@import url('https://cdn.jsdelivr.net/gh/fonts-archive/Paperlogy/Paperlogy.css');

/* ✨ 테마별 색상 변수 정의 시작 */
/* Theme 0: Elegant Purple (NEW DEFAULT) */
body, body.theme-elegant-purple {
    --bg-color: #1a1625;
    --sidebar-bg: #221c30;
    --card-bg: #2a2438;
    --panel-bg: #1e1a2a;
    --primary-text: #e8e4f0;
    --secondary-text: #a39bb8;
    --accent-gradient: linear-gradient(135deg, #8b5cf6, #ec4899);
    --accent-color: #8b5cf6;
    --highlight-color: #ec4899;
    --border-color: rgba(139, 92, 246, 0.15);
    --glow-color: rgba(139, 92, 246, 0.4);
    --add-color: #10b981;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
}

/* Theme 1: Original (Rocket) */
body.theme-original {
    --bg-color: #0d1117; 
    --sidebar-bg: #161b22; 
    --card-bg: #21262d;
    --panel-bg: #1c2128;
    --primary-text: #e6edf3; 
    --secondary-text: #8b949e;
    --accent-gradient: linear-gradient(90deg, #32cd32, #adff2f);
    --accent-color: #32cd32;
    --highlight-color: #adff2f;
    --border-color: rgba(255, 255, 255, 0.1);
    --glow-color: rgba(50, 205, 50, 0.5);
    --add-color: #2ea043;
    --danger-color: #f85149;
    --success-color: #2ea043;
    --warning-color: #d29922;
    --info-color: #1f6feb;
}
/* Theme 2: Prestige */
body.theme-prestige {
    --bg-color: #1a1a1a; 
    --sidebar-bg: #1f1f1f; 
    --card-bg: #2a2a2a;
    --panel-bg: #252525;
    --primary-text: #f0f0f0; 
    --secondary-text: #a0a0a0;
    --accent-gradient: linear-gradient(90deg, #a792c7, #8e82a2);
    --accent-color: #a792c7;
    --highlight-color: #d4af37;
    --border-color: rgba(255, 255, 255, 0.1);
    --glow-color: rgba(167, 146, 199, 0.5);
    --add-color: #82c993;
    --danger-color: #d9534f;
    --success-color: #82c993;
    --warning-color: #e6a23c;
    --info-color: #5b9bd5;
}
/* Theme 3: Retro Blue (Old Original) */
body.theme-retro-blue {
    --bg-color: #1a1a2e; 
    --sidebar-bg: #16213e; 
    --card-bg: #1f2847;
    --panel-bg: #1a2340;
    --primary-text: #e0e0e0; 
    --secondary-text: #a0a0c0;
    --accent-gradient: linear-gradient(90deg, #e94560, #f87a8f);
    --accent-color: #e94560;
    --highlight-color: #6beac9;
    --border-color: rgba(100, 150, 255, 0.15);
    --glow-color: rgba(58, 123, 213, 0.5);
    --add-color: #43e97b;
    --danger-color: #e94560;
    --success-color: #43e97b;
    --warning-color: #feca57;
    --info-color: #54a0ff;
}
/* Theme 4: Modern Light */
body.theme-light {
    --bg-color: #f4f6f8; 
    --sidebar-bg: #ffffff; 
    --card-bg: #ffffff;
    --panel-bg: #e9ecef;
    --primary-text: #212529; 
    --secondary-text: #6c757d;
    --accent-gradient: linear-gradient(90deg, #0d6efd, #6c757d);
    --accent-color: #0d6efd;
    --highlight-color: #0d6efd;
    --border-color: rgba(0, 0, 0, 0.1);
    --glow-color: rgba(13, 110, 253, 0.5);
    --add-color: #198754;
    --danger-color: #dc3545;
    --success-color: #198754;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

/* Theme 5: Cultt Gradient (Pastel Dream) */
body.theme-cultt-gradient {
    --bg-color: linear-gradient(135deg, #ffecd2 0%, #fcb69f 25%, #a8edea 50%, #fed6e3 75%, #ffecd2 100%);
    --sidebar-bg: rgba(255, 255, 255, 0.25);
    --card-bg: rgba(255, 255, 255, 0.35);
    --panel-bg: rgba(255, 255, 255, 0.2);
    --primary-text: #2d2d2d;
    --secondary-text: #5a5a5a;
    --accent-gradient: linear-gradient(135deg, #ffecd2, #fcb69f, #a8edea, #fed6e3);
    --accent-color: #fcb69f;
    --highlight-color: #a8edea;
    --border-color: rgba(252, 182, 159, 0.2);
    --glow-color: rgba(252, 182, 159, 0.4);
    --add-color: #7fd8be;
    --danger-color: #ff9a8b;
    --success-color: #7fd8be;
    --warning-color: #ffd89b;
    --info-color: #a8edea;
    
    /* 글래스모피즘 효과 */
    --glass-backdrop: blur(10px);
    --glass-border: rgba(255, 255, 255, 0.4);
}

/* Cultt 테마 전용 배경 그라데이션 */
body.theme-cultt-gradient {
    background: linear-gradient(135deg, 
        #ffecd2 0%, 
        #fcb69f 25%, 
        #a8edea 50%, 
        #fed6e3 75%, 
        #ffecd2 100%);
    background-size: 400% 400%;
    animation: culttGradient 15s ease infinite;
}

@keyframes culttGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Cultt 테마 카드 글래스모피즘 + 굵은 검정 테두리 */
body.theme-cultt-gradient .card,
body.theme-cultt-gradient .sidebar,
body.theme-cultt-gradient .modal {
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 4px solid #000000;
    box-shadow: 0 8px 32px 0 rgba(252, 182, 159, 0.15);
    border-radius: 16px;
}

/* Cultt 테마 학생 리스트 아이템 */
body.theme-cultt-gradient .student-item {
    border: 3px solid #000000 !important;
    border-radius: 12px;
}

/* Theme 6: Nord (Nordic Blue) */
body.theme-nord {
    --bg-color: #2e3440;
    --sidebar-bg: #3b4252;
    --card-bg: #434c5e;
    --panel-bg: #3b4252;
    --primary-text: #eceff4;
    --secondary-text: #d8dee9;
    --accent-gradient: linear-gradient(135deg, #88c0d0, #81a1c1);
    --accent-color: #88c0d0;
    --highlight-color: #81a1c1;
    --border-color: rgba(136, 192, 208, 0.15);
    --glow-color: rgba(136, 192, 208, 0.4);
    --add-color: #a3be8c;
    --danger-color: #bf616a;
    --success-color: #a3be8c;
    --warning-color: #ebcb8b;
    --info-color: #5e81ac;
}

/* Theme 7: Tokyo Night */
body.theme-tokyo-night {
    --bg-color: #1a1b26;
    --sidebar-bg: #16161e;
    --card-bg: #24283b;
    --panel-bg: #1f2335;
    --primary-text: #c0caf5;
    --secondary-text: #9aa5ce;
    --accent-gradient: linear-gradient(135deg, #7aa2f7, #bb9af7);
    --accent-color: #7aa2f7;
    --highlight-color: #bb9af7;
    --border-color: rgba(122, 162, 247, 0.15);
    --glow-color: rgba(187, 154, 247, 0.5);
    --add-color: #9ece6a;
    --danger-color: #f7768e;
    --success-color: #9ece6a;
    --warning-color: #e0af68;
    --info-color: #7dcfff;
}

/* Theme 8: Monokai Pro */
body.theme-monokai-pro {
    --bg-color: #2d2a2e;
    --sidebar-bg: #221f22;
    --card-bg: #403e41;
    --panel-bg: #38353a;
    --primary-text: #fcfcfa;
    --secondary-text: #939293;
    --accent-gradient: linear-gradient(135deg, #ffd866, #ff6188);
    --accent-color: #ffd866;
    --highlight-color: #ff6188;
    --border-color: rgba(255, 216, 102, 0.15);
    --glow-color: rgba(255, 97, 136, 0.4);
    --add-color: #a9dc76;
    --danger-color: #ff6188;
    --success-color: #a9dc76;
    --warning-color: #fc9867;
    --info-color: #78dce8;
}

body.theme-cultt-gradient .student-item.active {
    border: 4px solid #000000 !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Cultt 테마 입력 필드 */
body.theme-cultt-gradient input,
body.theme-cultt-gradient select,
body.theme-cultt-gradient textarea {
    border: 3px solid #000000 !important;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.5);
}

body.theme-cultt-gradient input:focus,
body.theme-cultt-gradient select:focus,
body.theme-cultt-gradient textarea:focus {
    border: 3px solid #000000 !important;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
}

/* Cultt 테마 버튼 스타일 + 굵은 테두리 */
body.theme-cultt-gradient .btn,
body.theme-cultt-gradient .btn-primary {
    background: linear-gradient(135deg, #fcb69f, #ffecd2);
    color: #2d2d2d;
    border: 3px solid #000000 !important;
    font-weight: 600;
    border-radius: 10px;
    box-shadow: 3px 3px 0 #000000;
    transition: all 0.2s ease;
}

body.theme-cultt-gradient .btn:hover,
body.theme-cultt-gradient .btn-primary:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 #000000;
}

body.theme-cultt-gradient .btn:active,
body.theme-cultt-gradient .btn-primary:active {
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 #000000;
}

body.theme-cultt-gradient .btn-success {
    background: linear-gradient(135deg, #7fd8be, #a8edea);
    color: #2d2d2d;
    border: 3px solid #000000 !important;
    font-weight: 600;
    border-radius: 10px;
    box-shadow: 3px 3px 0 #000000;
}

body.theme-cultt-gradient .btn-success:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 #000000;
}

body.theme-cultt-gradient .btn-danger {
    background: linear-gradient(135deg, #ff9a8b, #fed6e3);
    color: #2d2d2d;
    border: 3px solid #000000 !important;
    font-weight: 600;
    border-radius: 10px;
    box-shadow: 3px 3px 0 #000000;
}

body.theme-cultt-gradient .btn-danger:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 #000000;
}

body.theme-cultt-gradient .btn-secondary {
    background: rgba(255, 255, 255, 0.6);
    color: #2d2d2d;
    border: 3px solid #000000 !important;
    font-weight: 600;
    border-radius: 10px;
    box-shadow: 3px 3px 0 #000000;
}

body.theme-cultt-gradient .btn-warning {
    background: linear-gradient(135deg, #ffd89b, #ffecd2);
    color: #2d2d2d;
    border: 3px solid #000000 !important;
    font-weight: 600;
    border-radius: 10px;
    box-shadow: 3px 3px 0 #000000;
}

/* Cultt 테마 검색창 */
body.theme-cultt-gradient .search-filter-box input {
    border: 3px solid #000000 !important;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 1rem;
}

/* Cultt 테마 모달 배경 */
body.theme-cultt-gradient .modal-backdrop {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
}

/* Cultt 테마 테이블 */
body.theme-cultt-gradient table {
    border: 4px solid #000000;
    border-radius: 12px;
    overflow: hidden;
}

body.theme-cultt-gradient th,
body.theme-cultt-gradient td {
    border: 2px solid #000000 !important;
}

/* Cultt 테마 뱃지 */
body.theme-cultt-gradient .badge {
    border: 2px solid #000000;
    font-weight: 600;
    padding: 4px 10px;
}

/* Cultt 테마 테마 프리뷰 박스 */
body.theme-cultt-gradient .theme-preview {
    border: 3px solid #000000 !important;
    border-radius: 8px;
}

/* Cultt 테마 세리프 헤드라인 */
body.theme-cultt-gradient h1,
body.theme-cultt-gradient h2,
body.theme-cultt-gradient h3 {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* ========== 테마별 버튼 스타일 ========== */

/* Elegant Purple 테마 버튼 */
body.theme-elegant-purple .btn-primary {
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    border-color: #8b5cf6;
    color: white;
}

body.theme-elegant-purple .btn-primary:hover {
    background: linear-gradient(135deg, #7c3aed, #db2777);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

body.theme-elegant-purple .btn-success {
    background: #10b981;
    border-color: #059669;
    color: white;
}

body.theme-elegant-purple .btn-success:hover {
    background: #059669;
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

body.theme-elegant-purple .btn-danger {
    background: #ef4444;
    border-color: #dc2626;
    color: white;
}

body.theme-elegant-purple .btn-danger:hover {
    background: #dc2626;
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
}

body.theme-elegant-purple .btn-warning {
    background: #f59e0b;
    border-color: #d97706;
    color: white;
}

body.theme-elegant-purple .btn-info {
    background: #3b82f6;
    border-color: #2563eb;
    color: white;
}

body.theme-elegant-purple .btn-secondary {
    background: rgba(139, 92, 246, 0.2);
    border-color: rgba(139, 92, 246, 0.3);
    color: #e8e4f0;
}

/* Original 테마 버튼 */
body.theme-original .btn-primary {
    background: linear-gradient(90deg, #32cd32, #adff2f);
    border-color: #32cd32;
    color: #0d1117;
    font-weight: 600;
}

body.theme-original .btn-primary:hover {
    background: linear-gradient(90deg, #2eb82e, #9aeb2a);
    box-shadow: 0 0 20px rgba(50, 205, 50, 0.5);
}

body.theme-original .btn-success {
    background: #2ea043;
    border-color: #2ea043;
    color: white;
}

body.theme-original .btn-danger {
    background: #f85149;
    border-color: #f85149;
    color: white;
}

body.theme-original .btn-secondary {
    background: rgba(50, 205, 50, 0.15);
    border-color: rgba(50, 205, 50, 0.3);
    color: #e6edf3;
}

/* Prestige 테마 버튼 */
body.theme-prestige .btn-primary {
    background: linear-gradient(90deg, #a792c7, #8e82a2);
    border-color: #a792c7;
    color: white;
}

body.theme-prestige .btn-primary:hover {
    background: linear-gradient(90deg, #9580b8, #7d7193);
    box-shadow: 0 0 20px rgba(167, 146, 199, 0.5);
}

body.theme-prestige .btn-success {
    background: #82c993;
    border-color: #82c993;
    color: #1a1a1a;
}

body.theme-prestige .btn-danger {
    background: #d9534f;
    border-color: #d9534f;
    color: white;
}

body.theme-prestige .btn-warning {
    background: #d4af37;
    border-color: #d4af37;
    color: #1a1a1a;
}

body.theme-prestige .btn-secondary {
    background: rgba(167, 146, 199, 0.2);
    border-color: rgba(167, 146, 199, 0.3);
    color: #f0f0f0;
}

/* Retro Blue 테마 버튼 */
body.theme-retro-blue .btn-primary {
    background: linear-gradient(90deg, #e94560, #f87a8f);
    border-color: #e94560;
    color: white;
}

body.theme-retro-blue .btn-primary:hover {
    background: linear-gradient(90deg, #d73d54, #e76b80);
    box-shadow: 0 0 20px rgba(233, 69, 96, 0.5);
}

body.theme-retro-blue .btn-success {
    background: #43e97b;
    border-color: #43e97b;
    color: #1a1a2e;
    font-weight: 600;
}

body.theme-retro-blue .btn-danger {
    background: #e94560;
    border-color: #e94560;
    color: white;
}

body.theme-retro-blue .btn-info {
    background: #6beac9;
    border-color: #6beac9;
    color: #1a1a2e;
    font-weight: 600;
}

body.theme-retro-blue .btn-secondary {
    background: rgba(233, 69, 96, 0.2);
    border-color: rgba(233, 69, 96, 0.3);
    color: #e0e0e0;
}

/* Light 테마 버튼 */
body.theme-light .btn-primary {
    background: #0d6efd;
    border-color: #0d6efd;
    color: white;
}

body.theme-light .btn-primary:hover {
    background: #0b5ed7;
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

body.theme-light .btn-success {
    background: #198754;
    border-color: #198754;
    color: white;
}

body.theme-light .btn-danger {
    background: #dc3545;
    border-color: #dc3545;
    color: white;
}

body.theme-light .btn-warning {
    background: #ffc107;
    border-color: #ffc107;
    color: #212529;
}

body.theme-light .btn-info {
    background: #0dcaf0;
    border-color: #0dcaf0;
    color: #212529;
}

body.theme-light .btn-secondary {
    background: #6c757d;
    border-color: #6c757d;
    color: white;
}

/* Theme 6: Nord 버튼 */
body.theme-nord .btn-primary {
    background: linear-gradient(135deg, #88c0d0, #81a1c1);
    border-color: #88c0d0;
    color: #2e3440;
}

body.theme-nord .btn-success {
    background: #a3be8c;
    border-color: #a3be8c;
    color: #2e3440;
}

body.theme-nord .btn-danger {
    background: #bf616a;
    border-color: #bf616a;
    color: #eceff4;
}

body.theme-nord .btn-warning {
    background: #ebcb8b;
    border-color: #ebcb8b;
    color: #2e3440;
}

body.theme-nord .btn-info {
    background: #5e81ac;
    border-color: #5e81ac;
    color: #eceff4;
}

body.theme-nord .btn-secondary {
    background: #4c566a;
    border-color: #4c566a;
    color: #eceff4;
}

/* Theme 7: Tokyo Night 버튼 */
body.theme-tokyo-night .btn-primary {
    background: linear-gradient(135deg, #7aa2f7, #bb9af7);
    border-color: #7aa2f7;
    color: #1a1b26;
}

body.theme-tokyo-night .btn-success {
    background: #9ece6a;
    border-color: #9ece6a;
    color: #1a1b26;
}

body.theme-tokyo-night .btn-danger {
    background: #f7768e;
    border-color: #f7768e;
    color: #1a1b26;
}

body.theme-tokyo-night .btn-warning {
    background: #e0af68;
    border-color: #e0af68;
    color: #1a1b26;
}

body.theme-tokyo-night .btn-info {
    background: #7dcfff;
    border-color: #7dcfff;
    color: #1a1b26;
}

body.theme-tokyo-night .btn-secondary {
    background: #565f89;
    border-color: #565f89;
    color: #c0caf5;
}

/* Theme 8: Monokai Pro 버튼 */
body.theme-monokai-pro .btn-primary {
    background: linear-gradient(135deg, #ffd866, #ff6188);
    border-color: #ffd866;
    color: #2d2a2e;
}

body.theme-monokai-pro .btn-success {
    background: #a9dc76;
    border-color: #a9dc76;
    color: #2d2a2e;
}

body.theme-monokai-pro .btn-danger {
    background: #ff6188;
    border-color: #ff6188;
    color: #fcfcfa;
}

body.theme-monokai-pro .btn-warning {
    background: #fc9867;
    border-color: #fc9867;
    color: #2d2a2e;
}

body.theme-monokai-pro .btn-info {
    background: #78dce8;
    border-color: #78dce8;
    color: #2d2a2e;
}

body.theme-monokai-pro .btn-secondary {
    background: #727072;
    border-color: #727072;
    color: #fcfcfa;
}

/* ========== 테마별 버튼 스타일 끝 ========== */

/* ✨ 테마별 색상 변수 정의 끝 */

* { margin: 0; padding: 0; box-sizing: border-box; }

/* 스크롤바 스타일 - 부드럽고 덜 튀게 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Firefox 스크롤바 */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

body { 
    font-family: 'Paperlogy', sans-serif; 
    color: var(--primary-text);
    background-color: var(--bg-color);
}

.hidden { display: none !important; }

/* Login Styles */
#login-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; display: flex; justify-content: center; align-items: center; z-index: 2000; transition: opacity 0.5s ease; background-color: var(--bg-color); }
#login-modal { background-color: var(--card-bg); padding: 40px; border-radius: 15px; text-align: center; box-shadow: 0 10px 30px rgba(0,0,0,0.5); border: 1px solid var(--border-color); width: 90%; max-width: 400px; }
#login-modal h2 { background: var(--accent-gradient); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; margin-bottom: 10px; font-size: 1.8rem; }
#login-modal p { color: var(--secondary-text); margin-bottom: 20px; }
#login-form input { width: 100%; padding: 12px; margin-bottom: 20px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: 8px; color: var(--primary-text); font-size: 1rem; text-align: center; }
#login-form button { width: 100%; padding: 12px; border: none; border-radius: 10px; font-size: 1rem; font-weight: 700; cursor: pointer; background: var(--accent-gradient); color: white; transition: all 0.3s ease; }
#login-form button:hover { transform: translateY(-2px); }
.error-message { color: var(--danger-color); margin-top: 15px; height: 20px; font-weight: 500; }

/* Dashboard Styles */
.dashboard-container { 
    display: flex; 
    width: 100%; 
    max-width: 1600px;
    height: 100vh;
    margin: 0 auto;
    background-color: var(--sidebar-bg); 
    box-shadow: 0 10px 30px rgba(0,0,0,0.3); 
    overflow: hidden; 
}
body.theme-light .dashboard-container {
    background-color: #e9ecef;
}

.student-list { 
    width: 300px; 
    padding: 20px; 
    border-right: 1px solid var(--border-color); 
    display: flex; 
    flex-direction: column; 
    flex-shrink: 0;
    background-color: var(--sidebar-bg);
}

.list-header { margin-bottom: 15px; }
#sidebar-header-content { 
    min-height: 60px; 
    margin-bottom: 15px; 
    display: flex; 
    justify-content: center; 
    align-items: center; 
    gap: 8px;
    padding: 8px; 
    border-radius: 10px;
    cursor: pointer; 
    position: relative; 
    overflow: hidden; 
    transition: background-color 120ms ease-in-out; 
}

#sidebar-header-content:hover { background-color: rgba(255, 255, 255, 0.06); }
#sidebar-header-content:active { background-color: rgba(255, 255, 255, 0.1); }

/* Ripple for header click */
#sidebar-header-content .ripple { 
    position: absolute; 
    border-radius: 9999px; 
    background: rgba(255, 255, 255, 0.25); 
    transform: scale(0); 
    animation: sidebarHeaderRipple 550ms ease-out; 
    pointer-events: none; 
}

@keyframes sidebarHeaderRipple { 
    to { transform: scale(3.5); opacity: 0; } 
}

/* 상태 배지 안내 + 퇴원생 토글 (아주 작은 폰트) */
.status-legend-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: 6px;
    margin-bottom: 8px;
    font-size: 11px;
    line-height: 1.2;
    color: var(--secondary-text);
    opacity: 0.9;
}
.status-legend-row .legend-left span { margin-right: 4px; }
.status-legend-row .legend-sep { opacity: 0.6; margin-right: 6px; }
.status-legend-row .legend-inactive-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
    color: var(--secondary-text);
}
.status-legend-row input[type="checkbox"] { transform: scale(0.9); accent-color: var(--accent-color); }
#sidebar-logo { max-width: 100%; max-height: 60px; object-fit: contain; }
#sidebar-title-text { font-size: 1.5rem; background: var(--accent-gradient); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; transition: opacity 0.2s; }
#sidebar-title-text:hover { opacity: 0.8; }
#name-search { width: 100%; padding: 10px; margin-bottom: 10px; background-color: var(--card-bg); color: var(--primary-text); border: 1px solid var(--border-color); border-radius: 8px; font-size: 0.9rem; transition: all 0.3s ease; }
#name-search:focus { border-color: var(--glow-color); box-shadow: 0 0 8px var(--glow-color); outline: none; }
.list-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }
.list-controls select, .list-controls button { width: 100%; padding: 10px; background-color: var(--card-bg); color: var(--primary-text); border: 1px solid var(--border-color); border-radius: 8px; font-size: 0.9rem; cursor: pointer; transition: all 0.3s ease; text-align: left; }
.list-controls select:hover, .list-controls button:hover { border-color: var(--glow-color); background-color: var(--bg-color); }
.list-controls .full-width { grid-column: 1 / -1; }
.checkbox-filter { grid-column: 1 / -1; display: flex; align-items: center; gap: 8px; padding: 5px; font-size: 0.9rem; }
.student-list ul { list-style: none; overflow-y: auto; flex-grow: 1; padding-right: 5px; }
.student-list li { padding: 8px 15px; margin-bottom: 5px; border-radius: 10px; cursor: pointer; transition: all 0.2s ease-in-out; font-weight: 500; border: 1px solid transparent; }
.student-list li:hover { background-color: rgba(255, 255, 255, 0.08); border-color: var(--secondary-text); transform: translateX(5px); }
body.theme-light .student-list li:hover { background-color: rgba(0,0,0,0.05); }
.student-list li.active { background: var(--accent-gradient); color: white; transform: translateX(5px); border-color: transparent; }
.student-list li.inactive-student { opacity: 0.5; font-style: italic; text-decoration: line-through; }
.sidebar-buttons2 { margin-top: 15px; display: flex; flex-direction: column; gap: 10px; }
.sidebar-buttons {
    margin-top: 15px;
    display: grid;
    grid-template-columns: 1fr 1fr; /* 2열 그리드 */
    gap: 10px;
}

.sidebar-buttons .full-width {
    grid-column: 1 / -1; /* 1개의 아이템이 2열을 모두 차지 */
}
/* 사이드바 버튼은 design-system.css의 .btn 클래스 사용 */
.sidebar-btn { 
  text-decoration: none;
  text-align: center;
  display: block;
  width: 100%;
}
/* 기존 클래스를 design-system.css의 클래스로 대체:
   .sidebar-btn.primary → .btn.btn-primary
   .sidebar-btn.restore → .btn.btn-secondary
   .sidebar-btn.logout-btn → .btn.btn-danger
*/
.main-content { flex-grow: 1; padding: 30px; overflow-y: auto; display: flex; flex-direction: column; min-width: 0; }
.main-content > .card { margin-bottom: 20px; }
.card { background-color: var(--card-bg); padding: 20px; border-radius: 15px; border: 1px solid var(--border-color); }
#growth-chart-card { grid-column: 1 / -1; min-height: 400px; }
h1 { font-size: 2.2rem; }
h3 { color: var(--primary-text); margin-bottom: 15px; font-weight: 500; }

.details-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 20px; 
    margin-bottom: 20px; 
}

/* 커스텀 레이아웃: 왼쪽 기본정보, 중간 레슨이력, 오른쪽 차트들 */
.details-grid-custom {
    display: grid;
    grid-template-columns: 1.8fr 1.1fr 0.9fr;
    gap: 20px;
    margin-bottom: 20px;
}

.basic-info-left {
    grid-row: span 1;
}

.lesson-history-card {
    display: flex;
    flex-direction: column;
}

.lesson-history-card h3 {
    margin-bottom: 15px;
}

.lesson-history-card #lesson-dates-list {
    flex: 1;
}

.charts-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.full-width-bottom {
    grid-column: 1 / -1;
}

@media (max-width: 1200px) {
    .details-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .details-grid-custom {
        grid-template-columns: 1fr;
    }
    
    .basic-info-left {
        grid-row: auto;
    }
}

@media (max-width: 768px) {
    .details-grid {
        grid-template-columns: 1fr;
    }
    
    .details-grid-custom {
        grid-template-columns: 1fr;
    }
}
.header-stats-card { display: flex; justify-content: space-around; padding: 25px 20px; text-align: center; margin-bottom: 20px; }
.header-stats-card .stat-item { border-right: 1px solid var(--border-color); flex-grow: 1; }
.header-stats-card .stat-item:last-child { border-right: none; }
.header-stats-card .stat-item h3 { font-size: 1rem; color: var(--secondary-text); }
.header-stats-card .stat-item .value { font-size: 2.5rem; font-weight: 700; color: var(--highlight-color); }
.overview-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.list-card { grid-column: 1 / -1; margin-top: 20px; }
.item-list { list-style: none; max-height: 150px; overflow-y: auto; }
.list-item { display: flex; justify-content: space-between; align-items: center; padding: 5px 10px; border-radius: 8px; margin-bottom: 4px; background-color: rgba(0,0,0,0.2); }
body.theme-light .list-item { background-color: rgba(0,0,0,0.05); }
.details-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; flex-shrink: 0; flex-wrap: wrap; gap: 15px;}
.details-header .profile { display: flex; align-items: center; gap: 20px; }
.details-header .profile-pic { display: none; } /* 프로필 이미지 숨김 */
.details-header-buttons { 
    display: flex; 
    gap: 8px; 
    flex-wrap: wrap; 
}

/* ✅ 탭 스타일 버튼 */
.header-action-btn {
    padding: 10px 18px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--secondary-text);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.header-action-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--glow-color);
    color: var(--primary-text);
    box-shadow: 0 0 8px rgba(76, 175, 80, 0.2);
}

/* ✅ 정보 수정 버튼 강조 (붉은색) */
#edit-student-btn {
    border: 2px solid var(--danger-color);
    color: var(--danger-color);
    font-weight: 600;
}

#edit-student-btn:hover {
    background: rgba(220, 53, 69, 0.1);
    border-color: var(--danger-color);
    color: var(--danger-color);
    box-shadow: 0 0 8px rgba(220, 53, 69, 0.3);
}

body.theme-light .header-action-btn {
    border-color: #d1d5db;
    color: #6b7280;
}

body.theme-light .header-action-btn:hover {
    background: rgba(0, 0, 0, 0.02);
    border-color: #4caf50;
    color: #1f2937;
}

body.theme-light #edit-student-btn {
    border: 2px solid #dc3545;
    color: #dc3545;
}

body.theme-light #edit-student-btn:hover {
    background: rgba(220, 53, 69, 0.05);
    border-color: #dc3545;
    color: #dc3545;
    box-shadow: 0 0 8px rgba(220, 53, 69, 0.2);
}
.stat-card { text-align: center; }
.stat-card .value { font-size: 2.5rem; font-weight: 700; color: var(--highlight-color); margin: 10px 0; }
.goal-card.value { font-size: 1.5rem; line-height: 1.5; color: var(--primary-text); }
.info-item { 
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px; 
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    transition: background-color 0.2s ease;
}
.info-item:hover {
    background-color: rgba(255, 255, 255, 0.02);
    padding-left: 8px;
    padding-right: 8px;
    border-radius: 6px;
}
.info-item .label {
    color: var(--secondary-text);
    font-weight: 500;
    font-size: 0.95rem;
    text-align: left;
}
.info-item > span:last-child,
.info-item > div:last-child {
    color: var(--primary-text);
    font-weight: 600;
    text-align: right;
}
.info-item.full-width {
    grid-template-columns: 1fr;
    align-items: start;
}
.info-item.full-width .label {
    margin-bottom: 6px;
    text-align: left;
}
.info-item.full-width > span:last-child {
    text-align: left;
}

/* Student detail info items - grid layout */
.student-info-item { 
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px; 
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    transition: background-color 0.2s ease;
}
.student-info-item:hover {
    background-color: rgba(255, 255, 255, 0.02);
    padding-left: 8px;
    padding-right: 8px;
    border-radius: 6px;
}
.student-info-item .label {
    color: var(--secondary-text);
    font-weight: 500;
    font-size: 0.95rem;
    text-align: left;
}
.student-info-item > span:last-child,
.student-info-item > div:last-child {
    color: var(--primary-text);
    font-weight: 600;
    text-align: right;
}
.student-info-item.full-width {
    grid-template-columns: 1fr;
    align-items: start;
}
.student-info-item.full-width .label {
    margin-bottom: 6px;
    text-align: left;
}
.student-info-item.full-width > span:last-child {
    text-align: left;
}
.contact-actions { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.contact-actions button { background: none; border: 1px solid var(--border-color); color: var(--secondary-text); border-radius: 5px; cursor: pointer; padding: 2px 6px; font-size: 1rem; line-height: 1; text-decoration: none; }
.contact-actions button:hover { border-color: var(--glow-color); color: var(--primary-text); }

.subject-list { display: flex; flex-wrap: wrap; gap: 8px; }
.subject-tag { background-color: var(--bg-color); padding: 5px 12px; border-radius: 15px; font-size: 0.9rem; border: 1px solid var(--border-color); }

/* Comment Section Styles */
.comment-section { grid-column: 1 / -1; display: flex; flex-direction: column; }
.comment-history { max-height: 300px; overflow-y: auto; flex-grow: 1; padding-right: 10px; margin-bottom: 20px; }
.comment-item { display: flex; justify-content: space-between; align-items: flex-start; gap: 15px; margin-bottom: 15px; padding-bottom: 15px; border-bottom: 1px solid var(--border-color); }
.comment-item:last-child { border-bottom: none; }
.comment-content { flex-grow: 1; }
.comment-date { font-size: 0.9rem; color: var(--secondary-text); margin-bottom: 5px; font-weight: 500; }
.comment-text { line-height: 1.6; white-space: pre-wrap; }
.delete-comment-btn { background-color: transparent; border: 1px solid var(--danger-color); color: var(--danger-color); padding: 4px 8px; border-radius: 5px; cursor: pointer; font-size: 0.8rem; transition: all 0.2s ease; flex-shrink: 0; }
.delete-comment-btn:hover { background-color: var(--danger-color); color: white; }
.add-comment-form { display: flex; flex-direction: column; gap: 10px; }
.add-comment-form textarea { width: 100%; min-height: 80px; padding: 12px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: 8px; color: var(--primary-text); font-size: 1rem; transition: all 0.3s ease; }
.add-comment-form button { align-self: flex-end; padding: 10px 20px; border: none; border-radius: 8px; cursor: pointer; font-weight: 500; transition: all 0.3s ease; background: var(--accent-gradient); color: white; }
.add-comment-form button:hover { transform: translateY(-2px); }

#calendar-card { display: flex; flex-direction: column; flex-grow: 1; }
#calendar { flex-grow: 1; --fc-border-color: var(--border-color); }
.fc-event.rescheduled-from, .fc-event.canceled { background-color: var(--danger-color) !important; border-color: var(--danger-color) !important; text-decoration: line-through; }
.fc-event.rescheduled-to { background-color: var(--highlight-color) !important; border-color: var(--highlight-color) !important; }
.fc-event.added { background-color: var(--add-color) !important; border-color: var(--add-color) !important; }

/* 캘린더 이벤트 텍스트 폰트 크기 및 굵기 조정 (짤림 방지) */
.fc-event-title, .fc-event-time, .fc-list-event-title, .fc-list-event-time { font-size: 0.7rem !important; line-height: 1.2 !important; font-weight: 400 !important; }
.fc-daygrid-event-harness .fc-event { font-size: 0.65rem !important; padding: 1px 2px !important; font-weight: 400 !important; }
.fc-event-main { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 400 !important; }

/* Modal Styles */
.modal-backdrop { z-index: 1000; position: fixed; top: 0; left: 0; width: 100%; height: 100%; backdrop-filter: blur(5px); background-color: rgba(0,0,0,0.5); display: flex; justify-content: center; align-items: center; opacity: 0; visibility: hidden; transition: opacity 0.3s ease; }
.modal-backdrop.visible { opacity: 1; visibility: visible; }
.modal { background-color: var(--card-bg); padding: 30px; border-radius: 15px; width: 90%; max-width: 900px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); transform: scale(0.95); transition: transform 0.3s ease; display: flex; flex-direction: column; max-height: 95vh; }
.modal.modal-wide { max-width: 1000px; }
.modal h2 { flex-shrink: 0; margin-bottom: 20px; }
.modal form { display: flex; flex-direction: column; flex-grow: 1; min-height: 0; }
.modal-backdrop.visible .modal { transform: scale(1); }
.form-container { display: flex; gap: 30px; flex-grow: 1; min-height: 0; }
.form-fields { flex-grow: 1; overflow-y: auto; padding-right: 15px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label { margin-bottom: 8px; color: var(--secondary-text); font-size: 0.9rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: 8px; color: var(--primary-text); font-size: 1rem; transition: all 0.3s ease; }
.form-group input:read-only, .form-group select:disabled { background-color: var(--sidebar-bg); cursor: not-allowed; opacity: 0.7; }
body.theme-light .form-group input:read-only, body.theme-light .form-group select:disabled { background-color: #e9ecef; }
.form-group .address-group { display: flex; gap: 10px; }
.form-group .address-group button { flex-shrink: 0; padding: 0 15px; transition: all 0.3s ease; }
.form-group .address-group button:disabled { cursor: not-allowed; opacity: 0.7; }
.form-divider { grid-column: 1 / -1; border: none; border-top: 1px solid var(--border-color); margin: 10px 0; }
input:-webkit-autofill, input:-webkit-autofill:hover, input:-webkit-autofill:focus, input:-webkit-autofill:active { -webkit-text-fill-color: var(--primary-text) !important; -webkit-box-shadow: 0 0 0 1000px var(--bg-color) inset !important; }
.profile-pic-group { display: none; }
.profile-pic-preview { display: none; }
.modal-actions { margin-top: 20px; }
.modal-buttons { margin-top: 15px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--border-color); padding-top: 20px; flex-shrink: 0; }
.modal-buttons .right-buttons { display: flex; gap: 15px; }
.modal-buttons button { padding: 10px 20px; border: none; border-radius: 8px; cursor: pointer; font-weight: 500; transition: all 0.3s ease; }
.modal-buttons .save { background: var(--accent-gradient); color: white; }
.modal-buttons .save:hover { transform: translateY(-2px); }
.modal-buttons .cancel { background-color: var(--sidebar-bg); border: 1px solid var(--border-color); color: var(--primary-text); }
.modal-buttons button.danger { background: none; border: 1px solid var(--danger-color); color: var(--danger-color); }
.modal-buttons button.danger:hover { background: var(--danger-color); color: white; }


.schedule-periods-list .schedule-period-item { display: grid; grid-template-columns: 1.2fr 1fr 1.5fr auto; gap: 10px; align-items: center; background-color: var(--bg-color); padding: 10px; border-radius: 8px; margin-bottom: 10px; }
.schedule-periods-list .schedule-period-item .form-group { margin: 0; }
.schedule-periods-list .schedule-period-item .form-group label { font-size: 0.8rem; }
.schedule-periods-list .delete-period-btn { background-color: transparent; border: 1px solid var(--danger-color); color: var(--danger-color); width: 36px; height: 36px; border-radius: 5px; cursor: pointer; font-size: 1rem; transition: all 0.2s ease; align-self: end; margin-bottom: 0px; }
.schedule-periods-list .delete-period-btn:hover { background-color: var(--danger-color); color: white; }
.schedule-periods-list .delete-period-btn:disabled { cursor: not-allowed; opacity: 0.5; }

.modal.admin-modal-container { max-width: 800px; max-height: 85vh; height: auto; }
.modal-content { flex-grow: 1; overflow-y: auto; padding-right: 15px; background-color: transparent; }
.admin-section { 
    margin-bottom: 25px; 
    padding: 20px; 
    padding-bottom: 20px; 
    border-bottom: 1px solid var(--border-color); 
    background-color: var(--card-bg);
    border-radius: 12px;
}
.admin-section:last-of-type { border-bottom: none; margin-bottom: 0; }
.admin-section h3 { margin-bottom: 15px; color: var(--primary-text); }
.theme-selector { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 20px; 
    padding: 10px 0;
}
.theme-option { cursor: pointer; text-align: center; }
.theme-option .theme-preview { 
    width: 100%; 
    max-width: 140px; 
    height: 80px; 
    margin: 0 auto 8px; 
    border-radius: 8px; 
    border: 2px solid transparent; 
    transition: all 0.2s; 
    position: relative; 
    overflow: hidden; 
}
.theme-option .theme-preview::after { content: ''; position: absolute; width: 30%; height: 12px; left: 10px; top: 10px; border-radius: 5px; background: var(--accent); }
.theme-option.active .theme-preview { 
    border-color: var(--accent-color); 
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
    transform: scale(1.05);
}
.theme-option:hover .theme-preview {
    transform: scale(1.05);
    border-color: var(--border-color);
}
.theme-option span {
    display: block;
    font-size: 0.85rem;
    color: var(--secondary-text);
    font-weight: 500;
}
.logo-management { display: flex; align-items: center; gap: 20px; }
#logo-preview { width: 200px; height: 80px; object-fit: contain; border: 1px solid var(--border-color); border-radius: 8px; }
.logo-buttons { display: flex; flex-direction: column; gap: 10px; flex-grow: 1; }
.instructor-management-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.instructor-add-container form { display: flex; flex-direction: column; gap: 15px; }
#instructor-management-list { list-style: none; max-height: 200px; overflow-y: auto; padding-right: 5px; }
#instructor-management-list li { display: flex; justify-content: space-between; align-items: center; padding: 10px; background-color: var(--bg-color); border-radius: 8px; margin-bottom: 8px; gap: 10px; }
#instructor-management-list .instructor-info { display: flex; flex-direction: column; flex-grow: 1; min-width: 0;}
#instructor-management-list .instructor-info .signature-url { font-size: 0.8rem; color: var(--secondary-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#instructor-management-list .instructor-info .pin-display { font-size: 0.9rem; font-weight: 500; color: var(--highlight-color); letter-spacing: 1px; }
#instructor-management-list .instructor-actions { display: flex; flex-direction: column; gap: 5px; align-items: flex-end; }
#instructor-management-list .pin-btn { font-size: 0.75rem; padding: 3px 8px; border-radius: 5px; cursor: pointer; border: 1px solid var(--border-color); background-color: var(--card-bg); color: var(--secondary-text); }
#instructor-management-list .delete-instructor-btn { background-color: var(--danger-color); color: white; border: none; border-radius: 5px; padding: 5px 10px; cursor: pointer; transition: opacity 0.2s; flex-shrink: 0; font-size: 0.75rem; }
#instructor-management-list .delete-instructor-btn:hover { opacity: 0.8; }
.data-management-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.sidebar-btn.danger { grid-column: 1 / -1; background: none; border: 1px solid var(--danger-color); color: var(--danger-color); }
.sidebar-btn.danger:hover { background: var(--danger-color); color: white; }

/* 학원 정보 폼 스타일 */
.academy-info-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.academy-info-form .form-group {
    display: flex;
    flex-direction: column;
}

.academy-info-form .form-group label {
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: var(--secondary-text);
    font-weight: 500;
}

.academy-info-form .form-group input {
    padding: 10px;
    background-color: var(--sidebar-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--primary-text);
    font-size: 0.95rem;
}

.academy-info-form .form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.academy-info-form button[type="submit"] {
    grid-column: 1 / -1;
    margin-top: 5px;
}

/* Notification Styles */
#notification-bell-container { position: relative; margin-bottom: 15px; }
#notification-bell-btn { background: none; border: none; color: var(--secondary-text); font-size: 1.5rem; cursor: pointer; padding: 5px; width: 100%; text-align: right; }
#notification-badge { position: absolute; top: 0; right: 0; background-color: var(--danger-color); color: white; border-radius: 50%; width: 20px; height: 20px; font-size: 0.75rem; display: flex; justify-content: center; align-items: center; font-weight: 700; }
#notification-panel {
    position: absolute;
    top: 100%;
    right: 0;
    width: 100%; 
    max-height: 400px;
    overflow-y: auto;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    z-index: 100;
    padding: 10px;
}
body.theme-light #notification-panel {
    background-color: #ffffff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
#notification-panel h3 { margin: 5px 10px 15px; font-size: 1rem; color: var(--primary-text); }
body.theme-light #notification-panel h3 { color: #2a2e3a; }
#notification-list .notification-item { padding: 10px; border-bottom: 1px solid var(--border-color); font-size: 0.9rem; cursor: pointer; color: var(--primary-text); }
body.theme-light #notification-list .notification-item { color: #2a2e3a; }
#notification-list .notification-item:last-child { border-bottom: none; }
#notification-list .notification-item:hover { background-color: rgba(255, 255, 255, 0.05); }
body.theme-light #notification-list .notification-item:hover { background-color: rgba(0, 0, 0, 0.05); }
#notification-list .notification-item small { color: var(--secondary-text); font-size: 0.8rem; }
body.theme-light #notification-list .notification-item small { color: #6b7280; }
#notification-list .notification-item.unread { font-weight: 500; }

/* Lesson Management Notification Bar Styles */
.notification-bar-title {
    color: var(--primary-text);
}
body.theme-light .notification-bar-title {
    color: #2a2e3a;
}

#lesson-notification-panel {
    color: var(--primary-text);
}
body.theme-light #lesson-notification-panel {
    background: #ffffff !important;
    color: #2a2e3a;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
}

#lesson-notification-list .notification-item {
    color: var(--primary-text);
    background: rgba(255, 255, 255, 0.03);
    padding: 12px;
    margin-bottom: 8px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}
body.theme-light #lesson-notification-list .notification-item {
    color: #2a2e3a;
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.notification-loading {
    color: var(--secondary-text);
}
body.theme-light .notification-loading {
    color: #6b7280;
}

#lesson-management-notification-bar:hover {
    background: linear-gradient(135deg, rgba(255, 152, 0, 0.15) 0%, rgba(255, 193, 7, 0.08) 100%);
    border-color: rgba(255, 152, 0, 0.5);
    transform: translateY(-1px);
}

#lesson-notification-panel .notification-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
}
body.theme-light #lesson-notification-panel .notification-item:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

#lesson-notification-panel .notification-item:last-child {
    border-bottom: none;
}

#lesson-notification-panel .notification-item.unread {
    background: rgba(255, 193, 7, 0.05);
    border-left: 3px solid var(--accent-color);
}

/* Statistics Page Styles */
.stats-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; flex-wrap: wrap; gap: 10px; }
.stats-filters { display: flex; gap: 8px; align-items: center; }
.stats-filters button, .stats-filters input { padding: 6px 10px; background-color: var(--card-bg); color: var(--primary-text); border: 1px solid var(--border-color); border-radius: 6px; cursor: pointer; font-size: 0.9rem; }
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }
.kpi-card { text-align: center; padding: 12px; }
.kpi-card h3 { font-size: 0.8rem; color: var(--secondary-text); margin-bottom: 6px; font-weight: 500; }
.kpi-card .value { font-size: 1.6rem; font-weight: 700; color: var(--highlight-color); margin-bottom: 3px; line-height: 1.2; }
.kpi-card .sub-value { font-size: 0.7rem; color: var(--secondary-text); margin-top: 4px; min-height: 16px; line-height: 1.3; }
.kpi-card.highlight-card { background: linear-gradient(135deg, rgba(50, 205, 50, 0.1), rgba(173, 255, 47, 0.1)); border: 1px solid var(--accent-color); }
.kpi-card.warning-card { background: linear-gradient(135deg, rgba(255, 140, 0, 0.1), rgba(255, 69, 0, 0.1)); border: 1px solid var(--danger-color); }
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.chart-grid .card { padding: 15px; }
.chart-grid .card h3 { font-size: 0.95rem; margin-bottom: 10px; }
.chart-grid .card > div { height: 250px !important; }
.chart-grid.chart-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.chart-grid.chart-grid-2col .card > div {
  height: 200px !important;
}

/* 목표 금액 프로그레스 바 스타일 */
.progress-bar-wrap { width: 100%; margin: 8px 0; display: flex; justify-content: center; }
.progress-bar { width: 90%; max-width: 180px; height: 16px; background: var(--border-color); border-radius: 8px; overflow: hidden; position: relative; }
.progress-bar-fill { height: 100%; background: var(--accent-gradient); border-radius: 8px; transition: width 0.5s; color: #fff; text-align: right; padding-right: 6px; font-size: 0.9rem; font-weight: 700; line-height: 16px; }

/* Responsive Styles */
@media (max-width: 1600px) { .dashboard-container { max-width: 100%; border-radius: 0; } }
@media (max-width: 1024px) {
    .dashboard-container { flex-direction: column; height: auto; }
    .student-list { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
    .student-list ul { max-height: 250px; }
    .main-content { width: 100%; overflow-y: visible; padding: 20px; }
    .modal { max-width: 95%; }
    .form-container { flex-direction: column; align-items: center; }
    .profile-pic-group { width: 100%; }
    .form-grid { grid-template-columns: 1fr 1fr; }
    .chart-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .main-content { padding: 15px; }
    h1 { font-size: 1.8rem; }
    .details-header h1 { font-size: 1.5rem; }
    .header-stats-card { flex-direction: column; gap: 15px; padding: 15px; }
    .header-stats-card .stat-item { border-right: none; border-bottom: 1px solid var(--border-color); padding-bottom: 15px; }
    .header-stats-card .stat-item:last-child { border-bottom: none; padding-bottom: 0; }
    .list-controls { grid-template-columns: 1fr; }
    .details-header .profile { gap: 15px; }
    .details-header .profile-pic { display: none; } /* 모바일에서도 프로필 이미지 숨김 */
    #edit-student-btn, #deactivate-student-btn, #create-report-btn { padding: 8px 10px; font-size: 0.85rem; }
    .form-grid { grid-template-columns: 1fr; }
    .form-group.full-width, .form-group[style*="grid-column: 1 / -1;"] { grid-column: 1 / -1; }
    .schedule-periods-list .schedule-period-item { grid-template-columns: 1fr; }
    .instructor-management-grid { grid-template-columns: 1fr; }
    
    /* 테마 선택기 모바일 반응형 */
    .theme-selector {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    .theme-option .theme-preview {
        max-width: 120px;
        height: 70px;
    }
}

label.required::after { content: ' *'; color: var(--danger-color); font-weight: 700; margin-left: 2px; }
.time-select-group { display: flex; gap: 10px; }
.time-select-group select { flex-grow: 1; }

/* ✨ 라이트 테마 차트/캘린더 색상 보정 */
body.theme-light .apexcharts-text { fill: #333; }
body.theme-light .apexcharts-legend-text { color: #333 !important; }
body.theme-light .fc-daygrid-day-number, body.theme-light .fc-col-header-cell-cushion, body.theme-light .fc-timegrid-axis-cushion { color: #333; }
body.theme-light .fc-list-event-title a { color: #333; }
body.theme-light .fc-list-day-text, body.theme-light .fc-list-day-side-text { color: #333; }
.info-item.vertical-contact {
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
}

/* --- 강사용 대시보드 스타일 --- */
.dashboard-subtitle {
    font-size: 2rem;
    color: var(--secondary-text);
    margin-top: 30px;
    margin-bottom: 30px;
    line-height: 1.6;
}

.teacher-dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: start;
}

.teacher-student-list {
    list-style: none;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 5px;
}

.teacher-student-item {
    padding: 12px 15px;
    margin-bottom: 8px;
    border-radius: 8px;
    background-color: var(--bg-color);
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    border: 1px solid var(--border-color);
}

.teacher-student-item:hover {
    background-color: var(--sidebar-bg);
    border-color: var(--accent-color);
    transform: translateX(4px);
}

.teacher-student-item strong {
    font-size: 1.1rem;
}

.student-lesson-schedule {
    display: block;
    font-size: 0.9rem;
    color: var(--secondary-text);
    margin-top: 4px;
}

.no-data-message {
    text-align: center;
    padding: 30px;
    color: var(--secondary-text);
}

@media (max-width: 1024px) {
    .teacher-dashboard-grid {
        grid-template-columns: 1fr;
    }
}
/* 사이드바 상단 2열 버튼 레이아웃 */
.sidebar-buttons2 {
  display: grid;
  grid-template-columns: 1fr 1fr; /* 1:1 비율의 2열 */
  gap: 8px; /* 버튼 사이의 간격 */
  margin-bottom: 8px; /* 아래 4개 버튼과의 간격 */
}
/* ✨ [신규] 대시보드 리스트 3단 그리드 */
.list-grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 18px;
}

.list-card .item-list {
  /* (스크롤이 필요하면 이 높이를 조절하세요) */
  max-height: 300px;
  overflow-y: auto;
}

/* 모바일 반응형 (화면이 좁아지면 2열, 1열로 변경) */
@media (max-width: 1200px) {
  .list-grid-3col {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .list-grid-3col {
    grid-template-columns: 1fr;
  }
}
/* --- (style.css 맨 아래에 추가) --- */

/* 대시보드 카드 헤더 (시계 포함) */
.card-header-with-clock {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* 대시보드 시계 스타일 */
.dashboard-clock-display {
  font-size: 1.1rem; /* 시계 폰트 크기 */
  font-weight: 500;
  color: var(--secondary-text);
  letter-spacing: 1px;
}

/* 모바일 반응형 (화면이 좁아지면 폰트 작게) */
@media (max-width: 768px) {
  .dashboard-clock-display {
    font-size: 0.9rem;
  }
}

/* --- style.css 파일의 모달 섹션 (Modal Styles)에 정확히 이 코드가 적용되어 있어야 함 --- */

.modal { 
    /* 모달의 최대 높이를 화면의 95%로 제한 */
    max-height: 95vh;
    display: flex;
    flex-direction: column;
}

.modal form { 
    display: flex; 
    flex-direction: column; 
    /* 폼이 공간을 최대한 차지하도록 설정 */
    flex-grow: 1; 
    min-height: 0;
}

.form-container { 
    flex-grow: 1; 
    min-height: 0;
}

.form-fields { 
    /* 콘텐츠 영역에 스크롤 적용 */
    flex-grow: 1; 
    overflow-y: auto; 
    padding-right: 15px; 
    padding-bottom: 20px;
}

.modal-buttons {
    /* 버튼 영역은 줄어들지 않고 하단에 고정 */
    flex-shrink: 0; 
}
/* style.css 파일에 추가 또는 수정 */

.enrollment-item .delete-enrollment-btn.danger {
    background: none;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    padding: 5px 10px; /* 버튼 크기 조정 */
    font-size: 0.85rem; /* 폰트 크기 조정 */
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
    /* 기존 인라인 스타일 대신 여기서 정렬 */
    align-self: center;
    height: auto;
    margin-top: 0;
}

.enrollment-item .delete-enrollment-btn.danger:hover {
    background-color: var(--danger-color);
    color: white;
}

/* 버튼이 포함된 그리드 셀 정렬 (필요시) */
.enrollment-item .form-grid {
    align-items: center; /* 내부 요소들을 세로 중앙 정렬 */
}
/* 삭제 버튼이 있는 특정 form-group의 정렬 조정 (만약 버튼이 form-group 안에 있다면) */
/* 예시: .enrollment-item .form-group:has(.delete-enrollment-btn) { justify-content: flex-end; } */
/* style.css 파일에 추가 */

/* --- 학생 상세 정보 탭 메뉴 스타일 --- */
/* style.css 파일: 탭 버튼 디자인 최종 수정 */

/* --- 학생 상세 정보 탭 메뉴 스타일 --- */

.student-detail-tabs {
    display: flex;
    margin-top: 20px;
    margin-bottom: 20px;
    background-color: var(--card-background-color); 
    border-radius: var(--border-radius);
    padding: 0 5px; 
    border: 1px solid var(--border-color); 
    overflow: hidden; 
    box-shadow: var(--shadow-small); 
}

/* 탭 버튼 기본 스타일 */
.student-detail-tabs .tab-link {
    background: none;
    border: none;
    padding: 14px 22px; /* 패딩 증가 */
    cursor: pointer;
    font-size: 1.05rem; /* 폰트 크기 확대 */
    font-weight: 500;
    color: var(--secondary-text); 
    transition: color 0.2s, background-color 0.2s;
    border-right: 1px solid var(--border-color); 
}

/* 탭 버튼 호버 스타일 */
.student-detail-tabs .tab-link:hover {
    color: var(--primary-text);
    background-color: var(--card-hover-color);
}

/* 활성화된 탭 스타일 */
.student-detail-tabs .tab-link.active {
    color: var(--primary-text);
    font-weight: 700; /* 폰트 두께 강조 */
    background-color: var(--content-background-color); 
    border-bottom: none; 
}

/* 탭의 양 끝 구분선 제거 */
.student-detail-tabs .tab-link:last-child {
    border-right: none; 
}
/* style.css 파일에 추가 */

/* 작은 모달 크기 정의 (알림용) */
.small-modal {
    max-width: 450px;
    padding: 30px;
}
/* 모달 제목 아이콘 스타일 */
#alert-modal-title {
    color: var(--danger-color); /* 알림 아이콘 색상 강조 */
}
/* style.css 파일에 추가 (팝업 스타일 및 버튼 통일성) */

/* 작은 모달 크기 정의 (알림용) */
.small-modal {
    max-width: 450px;
    padding: 30px;
}
/* 모달 제목 아이콘 색상 강조 */
#alert-modal-title {
    color: var(--danger-color); /* 알림 아이콘 색상 강조 */
}

/* Modal Buttons - 높이 통일 및 정렬 (기존 sidebar-btn 스타일 보강) */
.modal-buttons {
    display: flex;
    justify-content: flex-end; /* 버튼을 오른쪽으로 정렬 */
    gap: 10px; /* 버튼 사이 간격 추가 */
    margin-top: 20px;
    border-top: 1px solid var(--border-color); /* 상단 구분선 */
    padding-top: 20px;
    flex-shrink: 0;
}

/* sidebar-btn 클래스에 일관된 높이 및 기본 스타일 부여 */
.sidebar-btn {
    height: 38px; /* 일관적인 높이 설정 */
    line-height: 38px;
    padding: 0 15px;
    font-size: 0.95rem;
    border-radius: 8px; 
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center; 
    justify-content: center;
}

/* 팝업 버튼 디자인 */
.modal-buttons .sidebar-btn.cancel {
    background-color: var(--sidebar-bg);
    color: var(--primary-text);
    border: 1px solid var(--border-color);
}

.modal-buttons .sidebar-btn.restore {
    background-color: var(--accent-color);
    color: white;
    border: none;
}
/* --- 학생 상세 탭 메뉴 (버튼 스타일) --- */
.student-detail-tabs-button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.student-detail-tabs-button-group .tab-link {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--secondary-text);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.student-detail-tabs-button-group .tab-link:hover {
    background: var(--sidebar-bg);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--primary-text);
}

.student-detail-tabs-button-group .tab-link.active {
    background: var(--sidebar-bg);
    color: var(--primary-text);
    border-color: rgba(255, 255, 255, 0.3);
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
/* --- 캘린더 '보강(rescheduled-to)' 이벤트 배경색 변경 --- */
.fc-event.rescheduled-to {
    background-color: #3a7bd5 !important; /* 중간 톤 파란색 */
    border-color: #3a7bd5 !important;
    color: white !important; /* 글자색 흰색 유지 */
}

/* --- (선택) 캘린더 '추가(added)' 이벤트 배경색도 변경 --- */
/* .fc-event.added {
    background-color: #6a5acd !important; /* 약간 보라색 계열 */
/* border-color: #6a5acd !important;
    color: white !important;
} */
/* --- 레슨 일정 탭: '현재 회차 진행' 줄 바꿈 방지 --- */
/* info-item 클래스를 가진 div 중 progress bar를 포함하는 특정 항목 식별 */
.info-item:has(div[style*="width: 100%; height: 10px;"]) {
    display: flex; /* Flexbox 레이아웃 확인 */
    align-items: center; /* 세로 중앙 정렬 */
}

.info-item:has(div[style*="width: 100%; height: 10px;"]) > .label {
    flex-shrink: 0; /* 라벨이 줄어들지 않도록 설정 */
    white-space: nowrap; /* 라벨 내 줄 바꿈 방지 */
    margin-right: 10px; /* 라벨과 프로그레스 바 사이 간격 */
}

.info-item:has(div[style*="width: 100%; height: 10px;"]) > div[style*="width: 100%; height: 10px;"] {
    flex-grow: 1; /* 프로그레스 바가 남은 공간을 채우도록 설정 */
    /* margin-left 제거 (label의 margin-right로 대체) */
}
/* --- 버튼 및 입력 요소에 Paperlogy 폰트 강제 적용 --- */
button,
input,
select,
textarea {
    font-family: 'Paperlogy', sans-serif;
}

/* (선택 사항) 검색창 플레이스홀더에도 적용 */
input::placeholder {
    font-family: 'Paperlogy', sans-serif;
}
textarea::placeholder {
    font-family: 'Paperlogy', sans-serif;
}

/* (선택 사항) 일부 브라우저의 기본 버튼 폰트 상속 문제 해결 */
button {
    font-family: inherit; /* body 폰트 상속 강제 */
}
select {
    font-family: inherit;
}
/* 강사(알림 권한 없음)일 때 알림 UI 전부 숨김 */
.no-notif #notification-bell,
.no-notif #notification-bell-btn,
.no-notif #notification-badge,
.no-notif #notification-panel { display: none !important; }

select[disabled],
button[disabled],
select:disabled,
button:disabled,
#instructor-filter:disabled,
#instructor-filter[disabled] {
  cursor: not-allowed !important;
  opacity: 0.5 !important;
  pointer-events: none !important;
}
button[disabled].danger {
  opacity: 0.5 !important;
  cursor: not-allowed !important;
  filter: grayscale(0.4);
}
/* --- 이름/과목 필터 레이아웃 --- */
.search-filter-row {
    display: grid;
    grid-template-columns: 1fr 1fr; /* 이름 검색과 과목 필터가 1:1 비율 */
    gap: 10px; /* 요소 사이 간격 */
    margin-bottom: 10px; /* 아래 컨트롤과의 간격 */
    align-items: center; /* 세로 중앙 정렬 */
}

/* 이름 검색창 스타일 조정 (기존 스타일 상속) */
#name-search {
    width: 100%; /* 부모 그리드 셀 너비 채움 */
    margin-bottom: 0; /* search-filter-row에서 간격 관리 */
}

/* --- 과목 필터 스타일 (list-controls 그리드에 맞게 수정) --- */
#subject-filter.filter-select {
    /* width: 100%; 삭제 (그리드가 너비 관리) */
    padding: 10px;
    /* margin-bottom: 10px; 삭제 (그리드 gap이 간격 관리) */
    background-color: var(--card-bg);
    color: var(--primary-text);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}
#subject-filter.filter-select:hover {
    border-color: var(--glow-color);
    background-color: var(--bg-color);
}
/* 기존 list-controls 레이아웃 유지 */
.list-controls {
    display: grid;
    grid-template-columns: 1fr 1fr; /* 2열 그리드 */
    gap: 10px;
    margin-bottom: 10px;
}
/* ... (기존 .list-controls select, button 스타일 유지) ... */

#notification-panel {
  max-width: 360px;
}
/* 출석/취소 버튼 사용자 피드백 향상 */
.mark-attended-btn,
.mark-absent-btn {
  cursor: pointer;
  transition: transform .1s ease, filter .12s ease;
}

.mark-attended-btn:hover,
.mark-absent-btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.08);
}
.subject-btn:hover {
  background: var(--accent-gradient);
  border-color: var(--glow-color);
  color: white;
  box-shadow: 0 0 10px var(--glow-color);
}
/* 과목 버튼 (업그레이드 버전) */
#subject-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* 기본 상태 */
#subject-buttons .subject-btn {
  width: 100%;
  max-width: 520px;
  padding: 16px 22px;
  border-radius: 14px;
  font-weight: 800;
  font-size: 1.25rem;             /* ← 텍스트 크게 */
  letter-spacing: 0.3px;
  background: linear-gradient(180deg, var(--accent-color, #2ecc71), #27ae60);
  border: none;
  color: #fff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.25);
  transition: transform 0.12s ease, box-shadow 0.2s ease, filter 0.2s ease;
  cursor: pointer;
}

/* 마우스 올렸을 때 (롤오버) */
#subject-buttons .subject-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 6px 16px rgba(0,0,0,0.3);
}

/* 클릭 시 눌림 */
#subject-buttons .subject-btn:active {
  transform: translateY(1px);
  filter: brightness(0.95);
}

/* 출석번호 입력과 동일한 폭/정렬 */
#attendance-form {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#attendance-form input,
#attendance-form button,
#attendance-form .submit-btn {
  width: 100%;
  max-width: 520px;     /* 입력창과 동일 */
}

/* 버튼 정확히 중앙 정렬 + 입력창과 같은 높이감 */
#attendance-form button,
#attendance-form .submit-btn {
  display: flex;                 /* 중앙 정렬 핵심 */
  align-items: center;           /* 수직 중앙 */
  justify-content: center;       /* 수평 중앙 */
  height: 56px;                  /* 고정 높이: 입력창 느낌 */
  padding: 0 22px;               /* 좌우만 패딩 */
  line-height: 1;                /* 라인하이트 초기화 */
  font-size: 1.2rem;
  font-weight: 800;
  border-radius: 14px;
  border: none;
  background: linear-gradient(180deg, var(--accent-color, #2ecc71), #27ae60);
  color: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,.25);
  transition: transform .1s ease, box-shadow .2s ease, filter .2s ease;
}

#attendance-form button:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 6px 18px rgba(0,0,0,.35);
}

#attendance-form button:active {
  transform: translateY(1px);
}

/* --- 1. 카드 보관 하이라이트 (학생 목록 및 대시보드 공용) --- */
/* 학생 목록 (sidebar)의 카드 보관 하이라이트 */
.student-list li.card-stored-highlight { 
    background-color: rgba(100, 200, 100, 0.2) !important; /* 연한 녹색 하이라이트 */
}

/* --- 2. 종합 레슨 관리 테이블 하이라이트 (행 전체) --- */
/* 테이블 행의 카드 보관 하이라이트 */
#dashboard-table tbody tr.card-stored-highlight td {
    background-color: rgba(100, 200, 100, 0.15) !important;
    /* prevent highlight background from bleeding into border */
    -webkit-background-clip: padding-box;
    background-clip: padding-box;
    /* add an inset stroke so the border remains visually consistent even with semi-transparent backgrounds */
    box-shadow: inset 0 0 0 1px var(--border-color) !important;
}

body.theme-light #dashboard-table tbody tr.card-stored-highlight td {
    background-color: #e6ffe6 !important; /* 라이트 테마용 연한 녹색 */
    -webkit-background-clip: padding-box;
    background-clip: padding-box;
    box-shadow: inset 0 0 0 1px var(--border-color) !important;
}

/* Also ensure other highlighted rows (yellow/blue) keep consistent borders */
#dashboard-table tbody tr.highlight-yellow td,
#dashboard-table tbody tr.highlight-blue td {
    -webkit-background-clip: padding-box;
    background-clip: padding-box;
    box-shadow: inset 0 0 0 1px var(--border-color) !important;
    border-color: var(--border-color) !important;
}

body.theme-light #dashboard-table tbody tr.highlight-yellow td,
body.theme-light #dashboard-table tbody tr.highlight-blue td {
    -webkit-background-clip: padding-box;
    background-clip: padding-box;
    box-shadow: inset 0 0 0 1px var(--border-color) !important;
    border-color: var(--border-color) !important;
}

/* --- 3. 결제 주기 뱃지 스타일 정의 --- */
.payment-cycle-badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem; /* 글자 크기 약간 키움 */
    font-weight: 700;
    margin-left: 6px;
    color: white; 
    white-space: nowrap;
    text-shadow: 0 0 2px rgba(0, 0, 0, 0.3); /* 가독성 확보 */
}

/* 결제 주기 색상 정의 (요청 기반) */
/* 매월 정기 결제: 푸른색 (Primary) */
.cycle-MONTHLY { 
    background-color: var(--highlight-color, #adff2f); 
    color: var(--bg-color, #0d1117); /* 대비되는 색상 */
    text-shadow: none;
}
/* 단위 결제 (횟수 차감): 주황색 (Warning) */
.cycle-UNIT { 
    background-color: #ff7a00; /* 주황색 (Danger/Warning 계열) */
}

/* 종합 레슨 관리 테이블 내부 스타일 조정 */
#dashboard-table .payment-cycle-badge {
    margin-left: 0; /* 테이블 셀에서는 왼쪽 마진 제거 */
}
.cycle-FREE, .cycle-OTHER { 
    background-color: var(--secondary-text, #6c757d);
}
/* 3개월 표시 (배경색 없이 텍스트만) */
.cycle-3개월 { 
    background-color: transparent; /* 배경색 제거 */
    color: #ff7a00; /* 주황색 텍스트 */
    border: 1px solid #ff7a00; /* 주황색 테두리 */
}
/* ===== ���ο� ��ú��� ��� ��Ÿ�� ===== */

/* ���̵�� ���� */
.sidebar-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--danger-color);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.sidebar-btn {
    position: relative;
}

/* ����� ���� ��Ÿ�� */
#saved-views-list {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 5px 10px;
}

.saved-view-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
}

.saved-view-item:hover {
    background: var(--bg-color);
    border-color: var(--accent-color);
    transform: translateX(3px);
}

.saved-view-item .view-name {
    flex: 1;
    color: var(--primary-text);
}

.saved-view-item .view-delete {
    color: var(--danger-color);
    font-size: 0.9rem;
    padding: 0 5px;
    opacity: 0.6;
}

.saved-view-item .view-delete:hover {
    opacity: 1;
}

/* �ֱ� ���� �α� �г� */
#recent-changes-panel {
    max-height: 400px;
    overflow-y: auto;
}

.change-log-item {
    padding: 10px 15px;
    border-left: 3px solid var(--accent-color);
    margin-bottom: 10px;
    background: var(--bg-color);
    border-radius: 0 8px 8px 0;
}

.change-log-item .log-time {
    font-size: 0.75rem;
    color: var(--secondary-text);
    margin-bottom: 4px;
}

.change-log-item .log-content {
    font-size: 0.9rem;
    color: var(--primary-text);
}

.change-log-item.log-student {
    border-left-color: #3b82f6;
}

.change-log-item.log-payment {
    border-left-color: #10b981;
}

.change-log-item.log-attendance {
    border-left-color: #f59e0b;
}

/* �˸� ���� ��Ӵٿ� */
#notification-panel {
    position: absolute;
    top: 50px;
    right: 10px;
    width: 320px;
    max-height: 450px;
    overflow-y: auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    z-index: 1000;
    padding: 15px;
}

#notification-panel h3 {
    margin: 0 0 15px 0;
    font-size: 1rem;
    color: var(--primary-text);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.notification-item {
    padding: 10px;
    margin-bottom: 8px;
    background: var(--bg-color);
    border-radius: 8px;
    border-left: 3px solid var(--warning-color, #f59e0b);
    cursor: pointer;
    transition: all 0.2s;
}

.notification-item:hover {
    transform: translateX(3px);
    background: var(--sidebar-bg);
}

.notification-item .notif-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary-text);
    margin-bottom: 4px;
}

.notification-item .notif-desc {
    font-size: 0.8rem;
    color: var(--secondary-text);
}

.notification-item.notif-urgent {
    border-left-color: var(--danger-color);
}

.notification-item.notif-info {
    border-left-color: var(--accent-color);
}

/* ������ �׼� �ڽ� */
#today-actions-box {
    background: linear-gradient(135deg, var(--card-bg), var(--sidebar-bg));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
}

#today-actions-box h3 {
    margin: 0 0 12px 0;
    font-size: 1rem;
    color: var(--accent-color);
}

.action-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-color);
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.action-item:hover {
    background: var(--card-bg);
    transform: translateX(3px);
}

.action-item .action-label {
    font-size: 0.9rem;
    color: var(--primary-text);
}

.action-item .action-count {
    font-weight: 700;
    font-size: 1rem;
    color: var(--accent-color);
}

.action-item.action-urgent .action-count {
    color: var(--danger-color);
}

/* 2�� �׸��� ���̾ƿ� (������ ���� + �ֱ� �⼮) */
.dashboard-two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 1024px) {
    .dashboard-two-column {
        grid-template-columns: 1fr;
    }
}

/* ���� ���� ��ư */
#save-current-view-btn {
    font-size: 0.85rem;
    padding: 6px 12px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

#save-current-view-btn:hover {
    filter: brightness(1.2);
    transform: translateY(-1px);
}

/* ===== ���� ��ú��� ���� ��Ÿ�� ===== */

/* ��ü ��� ��ú��� (�ʱ� ȭ��) */
#overview-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    border-color: var(--accent-color);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.stat-card .stat-label {
    font-size: 0.9rem;
    color: var(--secondary-text);
    margin-bottom: 8px;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-text);
}

.stat-card.stat-urgent .stat-value {
    color: var(--danger-color);
}

.stat-card.stat-warning .stat-value {
    color: #f59e0b;
}

.stat-card.stat-success .stat-value {
    color: var(--add-color);
}

/* �ֱ� Ȱ�� Ÿ�Ӷ��� */
#recent-activity-timeline {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    max-height: 400px;
    overflow-y: auto;
}

.timeline-item {
    display: flex;
    gap: 15px;
    padding: 12px;
    border-left: 3px solid var(--border-color);
    margin-bottom: 10px;
    border-radius: 0 8px 8px 0;
    background: var(--bg-color);
    transition: all 0.2s;
}

.timeline-item:hover {
    background: var(--sidebar-bg);
    transform: translateX(3px);
}

.timeline-item .timeline-icon {
    font-size: 1.5rem;
    min-width: 30px;
}

.timeline-item .timeline-content {
    flex: 1;
}

.timeline-item .timeline-time {
    font-size: 0.75rem;
    color: var(--secondary-text);
    margin-bottom: 4px;
}

.timeline-item .timeline-desc {
    font-size: 0.9rem;
    color: var(--primary-text);
}

.timeline-item.timeline-enrollment {
    border-left-color: #3b82f6;
}

.timeline-item.timeline-payment {
    border-left-color: #10b981;
}

.timeline-item.timeline-attendance {
    border-left-color: #f59e0b;
}

/* ���ã�� �л� ���� */
#favorite-students-section {
    background: var(--card-bg);
    border: 1px solid var(--accent-color);
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 10px;
}

#favorite-students-section h4 {
    margin: 0 0 8px 0;
    font-size: 0.85rem;
    color: var(--accent-color);
    padding: 0 5px;
}

.favorite-student-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    background: var(--bg-color);
    border-radius: 6px;
    margin-bottom: 5px;
    cursor: pointer;
    transition: all 0.2s;
}

.favorite-student-item:hover {
    background: var(--sidebar-bg);
    transform: translateX(3px);
}

.favorite-student-item .star-icon {
    color: #fbbf24;
    font-size: 0.9rem;
}

/* �л� ��� ���� */
.student-status-badge {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 8px; /* 아이콘과 이름 사이 여백 */
    vertical-align: middle; /* 텍스트와 수직 정렬 */
}

.student-status-badge.badge-overdue {
    background: var(--danger-color);
    box-shadow: 0 0 6px var(--danger-color);
}

.student-status-badge.badge-payment-due {
    background: #f59e0b;
    box-shadow: 0 0 6px #f59e0b;
}

.student-status-badge.badge-low-attendance {
    background: #8b5cf6;
    box-shadow: 0 0 6px #8b5cf6;
}

.student-status-badge.badge-normal {
    background: var(--add-color);
}

/* 신규 학생 배지 */
.new-student-badge {
    display: inline-block;
    background: #ff4444;
    color: white;
    font-size: 8px;
    font-weight: 700;
    padding: 1px 4px;
    border-radius: 3px;
    margin-left: 4px;
    vertical-align: middle;
    animation: pulse-new 2s ease-in-out infinite;
    box-shadow: 0 0 6px rgba(255, 68, 68, 0.5);
    letter-spacing: 0.5px;
}

@keyframes pulse-new {
    0%, 100% { 
        opacity: 1; 
        transform: scale(1);
    }
    50% { 
        opacity: 0.8; 
        transform: scale(1.05);
    }
}

/* 오늘 할 일 체크리스트 */
#today-todo-checklist {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

.todo-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: var(--bg-color);
    border-radius: 8px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.todo-item:hover {
    background: var(--sidebar-bg);
    transform: translateX(3px);
}

.todo-item .todo-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--primary-text);
}

.todo-item .todo-icon {
    font-size: 1.2rem;
}

.todo-item .todo-count {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent-color);
}

.todo-item.todo-urgent .todo-count {
    color: var(--danger-color);
}

/* ���� �׼� ��ư �׷� */
.quick-actions-bar {
    display: flex;
    gap: 10px;
    padding: 15px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.quick-action-btn {
    flex: 1;
    min-width: 120px;
    padding: 10px 15px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    font-size: 0.9rem;
    color: var(--primary-text);
}

/* ── 메인 메뉴 바 (탭형) ───────────────────────── */
.main-menu-bar {
    display: flex;
    gap: 0;
    background: var(--bg-color);
    border-radius: 10px;
    padding: 5px;
    border: 1px solid var(--border-color);
    margin-bottom: 25px;
}
.main-menu-btn {
    flex: 1;
    padding: 14px 20px;
    background: none;
    border: none;
    color: var(--secondary-text);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-align: center;
}
.main-menu-btn:hover {
    color: var(--primary-text);
    background: var(--sidebar-bg);
}
.main-menu-btn.active {
    color: var(--primary-text);
    background: var(--card-bg);
}

/* ── 하단 학원 정보 요약 패널 ───────────────────────── */
/* ⚠️ 학원 정보 스타일은 academy-info.css 파일에서 관리됩니다. 
   수정이 필요하면 academy-info.css를 편집하세요. */

/* ── Todo 스타일 대시보드 ───────────────────────── */
.todo-dashboard-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
    width: 100%;
    box-sizing: border-box;
}

/* 빠른 통계 바 */
.quick-stats-bar {
    display: flex;
    gap: 15px;
    padding: 15px;
    background: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.stat-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 12px;
    border-radius: 8px;
    background: var(--sidebar-bg);
    transition: all 0.3s ease;
    cursor: pointer;
}

.stat-item:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.05);
}

.stat-item.primary {
    border-left: 3px solid #4A90E2;
}

.stat-item.success {
    border-left: 3px solid #4CAF50;
}

.stat-item.warning {
    border-left: 3px solid #FFA500;
}

.stat-item.danger {
    border-left: 3px solid var(--danger-color);
}

.stat-item.info {
    border-left: 3px solid var(--accent-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--secondary-text);
    font-weight: 500;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-text);
}

/* 오늘의 일정 테이블 카드 */
.today-schedule-card {
    width: 100%;
}

.today-schedule-card .card-header-with-clock {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.today-schedule-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-text);
    margin: 0;
}

.dashboard-clock-display {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--secondary-text);
}

.schedule-table-wrapper {
    overflow-x: auto;
    overflow-y: auto;
    max-height: 400px;
    border-radius: 8px;
}

.today-schedule-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.today-schedule-table thead {
    background: var(--sidebar-bg);
    position: sticky;
    top: 0;
    z-index: 10;
}

.today-schedule-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--primary-text);
    border-bottom: 2px solid var(--border-color);
    background: var(--sidebar-bg);
}

.today-schedule-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

.today-schedule-table tbody tr:hover {
    background: var(--sidebar-bg);
}

.today-schedule-table td {
    padding: 12px;
    color: var(--primary-text);
}

.today-schedule-table td:first-child {
    font-weight: 600;
    color: var(--accent-color);
}

/* Todo 카드 그리드 */
.todo-cards-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    width: 100%;
    box-sizing: border-box;
}

.todo-card {
    aspect-ratio: 1 / 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
    min-width: 0;
    box-sizing: border-box;
}

.todo-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.todo-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-text);
    margin: 0;
}

.todo-add-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: var(--accent-color);
    color: white;
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.todo-add-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px var(--glow-color);
}

.todo-list {
    list-style: none;
    padding: 0;
    margin: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
}

.todo-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    position: relative;
}

.todo-item-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: var(--primary-text);
    font-size: 0.85rem;
    line-height: 1.4;
    flex: 1;
}

.todo-text {
    outline: none;
    flex: 1;
    padding: 2px 4px;
    border-radius: 3px;
    transition: background 0.2s ease;
    cursor: text;
    color: var(--primary-text);
}

.todo-text:hover {
    background: rgba(255, 255, 255, 0.03);
}

.todo-text:focus {
    background: var(--sidebar-bg);
    cursor: text;
}

.todo-delete-btn {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: none;
    background: var(--danger-color);
    color: white;
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    flex-shrink: 0;
}

.todo-list li:hover .todo-delete-btn {
    opacity: 1;
}

.todo-delete-btn:hover {
    transform: scale(1.1);
}

.todo-list input[type="checkbox"] {
    margin-top: 3px;
    width: 16px;
    height: 16px;
    cursor: pointer;
    flex-shrink: 0;
    accent-color: var(--accent-color);
}

.todo-list input[type="checkbox"]:checked + .todo-text {
    text-decoration: line-through;
    color: var(--secondary-text);
}

/* Todo 사용법 힌트 */
.todo-usage-hint {
    font-size: 0.7rem;
    color: var(--secondary-text);
    margin-top: 10px;
    opacity: 0.6;
    text-align: right;
    line-height: 1.2;
}

/* 반응형 조정 */
@media (max-width: 1200px) {
    .todo-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .todo-cards-grid {
        grid-template-columns: 1fr;
    }
    
    .todo-card {
        aspect-ratio: auto;
        min-height: 250px;
    }
}

.quick-action-btn:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.quick-action-btn .action-icon {
    font-size: 1.2rem;
    display: block;
    margin-bottom: 5px;
}

/* �ֱ� �� �л� ���� */
#recent-viewed-section {
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 10px;
}

#recent-viewed-section h4 {
    margin: 0 0 8px 0;
    font-size: 0.85rem;
    color: var(--secondary-text);
    padding: 0 5px;
}

.recent-student-item {
    padding: 6px 10px;
    background: var(--bg-color);
    border-radius: 6px;
    margin-bottom: 5px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.85rem;
    color: var(--primary-text);
}

.recent-student-item:hover {
    background: var(--card-bg);
    transform: translateX(3px);
}

/* �л� ī�� �� ���� */
.student-card-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.student-mini-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.3s;
}

.student-mini-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    border-color: var(--accent-color);
}

.student-mini-card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.student-mini-card .card-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-text);
}

.student-mini-card .card-status {
    font-size: 0.8rem;
    padding: 3px 8px;
    border-radius: 12px;
    background: var(--add-color);
    color: white;
}

.student-mini-card .card-info {
    font-size: 0.85rem;
    color: var(--secondary-text);
    margin-bottom: 8px;
}

.student-mini-card .card-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.student-mini-card .stat-item {
    text-align: center;
}

.student-mini-card .stat-item .label {
    color: var(--secondary-text);
    display: block;
    margin-bottom: 3px;
}

.student-mini-card .stat-item .value {
    color: var(--primary-text);
    font-weight: 600;
}

/* 체크사항 모달 스타일 */
.checklist-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.checklist-modal-backdrop.visible {
    opacity: 1;
}

.checklist-modal {
    background: var(--card-background);
    border-radius: 12px;
    padding: 24px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.checklist-modal-backdrop.visible .checklist-modal {
    transform: scale(1);
}

.checklist-modal h3 {
    margin: 0 0 16px 0;
    color: var(--primary-text);
    font-size: 1.25rem;
}

.checklist-modal textarea {
    width: 100%;
    min-height: 150px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--primary-text);
    background: var(--sidebar-background);
    resize: vertical;
    margin-bottom: 16px;
}

.checklist-modal textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.checklist-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.checklist-buttons button {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.checklist-buttons .save-btn {
    background: var(--accent-color);
    color: white;
}

.checklist-buttons .save-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.checklist-buttons .cancel-btn {
    background: var(--border-color);
    color: var(--primary-text);
}

.checklist-buttons .cancel-btn:hover {
    background: var(--secondary-text);
}

/* 학원 정보 푸터 스타일 */
.academy-info-footer {
    margin-top: 20px;
    padding: 16px 24px;
    background: var(--card-background);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.academy-info-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    color: var(--secondary-text);
    font-size: 0.9rem;
    line-height: 1.6;
}

.academy-info-content strong {
    color: var(--primary-text);
    font-weight: 600;
}

.academy-info-content .separator {
    color: var(--border-color);
    margin: 0 4px;
}

@media (max-width: 768px) {
    .academy-info-content {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
    
    .academy-info-content .separator {
        display: none;
    }
}

/* 금액 관련 KPI 카드 4열 배치 */
.kpi-money-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

/* 수금 이력 탭 스타일 */
.payment-history-section {
    padding: 20px;
}

.payment-section {
    margin-bottom: 25px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.payment-section h4 {
    margin: 0 0 15px 0;
    color: var(--primary-text);
    font-size: 1.1rem;
}

.payment-current {
    margin-top: 10px;
}

.payment-current > p {
    margin: 5px 0;
    color: var(--secondary-text);
}

.payment-status-paid,
.payment-status-unpaid {
    margin-top: 15px;
    padding: 15px;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.2);
}

body.theme-light .payment-status-paid,
body.theme-light .payment-status-unpaid {
    background: rgba(0, 0, 0, 0.03);
}

.payment-status-paid {
    border-left: 4px solid var(--accent-color);
}

.payment-status-unpaid {
    border-left: 4px solid var(--danger-color);
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.payment-status-paid .status-badge {
    background: var(--accent-color);
    color: white;
}

.payment-status-unpaid .status-badge {
    background: var(--danger-color);
    color: white;
}

.payment-info p {
    margin: 5px 0;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.btn-payment-process {
    margin-top: 10px;
    padding: 8px 16px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-payment-process:hover {
    background: #45a049;
    transform: translateY(-1px);
}

.payment-history-list {
    margin-top: 20px;
}

/* ============================================
   그룹수업 카드 스타일
   ============================================ */

/* 그룹수업 페이지 컨테이너 */
.group-classes-container {
    background: var(--bg-color) !important;
    color: var(--primary-text) !important;
    padding: 20px;
    min-height: 100vh;
}

/* 페이지 헤더 */
.group-classes-container .page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.group-classes-container .page-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-text) !important;
    margin: 0 0 4px 0;
}

.group-classes-container .page-subtitle {
    font-size: 1rem;
    color: var(--secondary-text) !important;
    margin: 0;
}

.header-actions {
    display: flex;
    gap: 8px;
}

/* 필터 섹션 */
.group-classes-container .filter-section {
    background: var(--card-bg) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 20px;
}

.filter-row {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 250px;
}

.search-input {
    width: 100%;
    padding: 10px 16px;
    background: var(--panel-bg) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 8px;
    color: var(--primary-text) !important;
    font-size: 0.95rem;
}

.search-input::placeholder {
    color: var(--secondary-text) !important;
}

.filter-controls {
    display: flex;
    gap: 8px;
}

.filter-select {
    padding: 10px 16px;
    background: var(--panel-bg) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 8px;
    color: var(--primary-text) !important;
    font-size: 0.95rem;
}

.filter-select:not(:disabled) {
    cursor: pointer;
}

.filter-select:disabled {
    cursor: not-allowed !important;
    opacity: 0.5 !important;
}

/* 메인 레이아웃 */
.group-classes-layout {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 20px;
}

.group-classes-container .classes-list-panel,
.group-classes-container .class-detail-panel {
    background: var(--card-bg) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 12px;
    padding: 20px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-text) !important;
    margin: 0;
}

.badge {
    background: var(--accent-color) !important;
    color: white !important;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.classes-list {
    max-height: calc(100vh - 280px);
    overflow-y: auto;
}

/* 클래스 카드 */
.group-classes-container .class-card {
    background: var(--panel-bg) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.group-classes-container .class-card:hover {
    border-color: var(--accent-color) !important;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.15);
    transform: translateY(-2px);
}

.group-classes-container .class-card.active {
    border-color: var(--accent-color) !important;
    background: var(--sidebar-bg) !important;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
}

.class-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    gap: 12px;
}

.class-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-text) !important;
    margin: 0;
    flex: 1;
}

.class-status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}

.class-status-badge.active {
    background: rgba(16, 185, 129, 0.2) !important;
    color: #10b981 !important;
}

.class-status-badge.closed {
    background: rgba(245, 158, 11, 0.2) !important;
    color: #f59e0b !important;
}

.class-status-badge.archived {
    background: rgba(107, 114, 128, 0.2) !important;
    color: #6b7280 !important;
}

.class-card-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--secondary-text) !important;
}

.class-card-info > div {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 클래스 상세 패널 */
#class-detail-content {
    color: var(--primary-text) !important;
}

.class-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.class-detail-header h2 {
    color: var(--primary-text) !important;
    margin: 0;
    font-size: 1.5rem;
}

.detail-actions {
    display: flex;
    gap: 8px;
}

.detail-sections {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.detail-section {
    background: var(--panel-bg) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 8px;
    padding: 16px;
}

.detail-section h3 {
    color: var(--primary-text) !important;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0 0 16px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.info-grid .info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-grid .info-item label {
    font-size: 0.85rem;
    color: var(--secondary-text) !important;
    font-weight: 500;
}

.info-grid .info-item span {
    font-size: 1rem;
    color: var(--primary-text) !important;
}

.students-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.student-chip {
    background: var(--accent-color) !important;
    color: white !important;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.student-chip .remove-btn {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.text-secondary {
    color: var(--secondary-text) !important;
}

.text-success {
    color: var(--success-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.memo-text {
    background: var(--bg-color) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 8px;
    padding: 12px;
    color: var(--primary-text) !important;
    white-space: pre-wrap;
    line-height: 1.6;
    margin: 0;
}

/* 그룹수업 모달의 textarea */
.group-classes-container textarea,
#group-class-modal textarea {
    background: var(--bg-color) !important;
    border: 1px solid var(--border-color) !important;
    color: var(--primary-text) !important;
}

#group-class-modal textarea::placeholder {
    color: var(--secondary-text) !important;
}

/* 빈 상태 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--secondary-text) !important;
}

.empty-state p {
    font-size: 1rem;
    margin: 0 0 16px 0;
}

/* 미납 학생 행 색상 */
.payment-due-student {
    background-color: rgba(255, 165, 0, 0.15) !important; /* 주황색 - 1사이클 미납 */
    border-left: none !important; /* 좌측 라인 없음 */
}

.arrears-student {
    background-color: rgba(255, 107, 107, 0.2) !important; /* 빨간색 - 2사이클 이상 미납 */
    border-left: 4px solid var(--danger-color) !important; /* 빨간색 좌측 굵은 라인 */
}

/* 2사이클 이상 미납 시 이름 셀은 일반 테두리 (좌우 굵은 라인 없음) */
tr.arrears-student td.student-name-cell {
    border-left: 0 !important;
    border-right: 0 !important;
}

/* 관리자 수동 체납 체크 - 이름 셀에만 좌우 굵은 라인 */
tr.manual-arrears td.student-name-cell {
    border-left: 3px solid var(--danger-color) !important;
    border-right: 3px solid var(--danger-color) !important;
}