/* ---------- CSS Variables ---------- */
:root {
    /* Premium Red Theme Palette */
    --bg-main: #000000;
    --bg-card: rgba(10, 10, 10, 0.7);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent: #ff3131; /* Neon Red */
    --accent-hover: #ff1a1a;
    --sidebar-bg: rgba(5, 5, 5, 0.85);
    --sidebar-text: #f8fafc;
    --sidebar-hover: rgba(50, 50, 50, 0.4);
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
    --border: rgba(255, 49, 49, 0.2);
    --shadow: 0 8px 32px 0 rgba(255, 0, 0, 0.15);
    --radius: 16px;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* ---------- Global Resets ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-color: #000;
}

body {
    background-color: transparent;
    color: var(--text-primary);
    transition: var(--transition);
    overflow-x: hidden;
}

ul { list-style: none; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; outline: none; transition: var(--transition); }

.page-section {
    display: none;
    animation: fadeUp 0.4s ease forwards;
}

.page-section.active {
    display: block;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- Layout Architecture ---------- */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-brand {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 2px;
    font-size: 1.4rem;
    font-weight: 700;
    border-bottom: 1px solid var(--border);
}

.sidebar-brand i { color: var(--accent); filter: drop-shadow(0 0 8px var(--accent)); }

.mobile-toggle {
    display: none;
    background: none;
    color: inherit;
    font-size: 1.5rem;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 16px 24px;
    gap: 16px;
    font-size: 1.05rem;
    color: rgba(255,255,255,0.7);
    border-left: 4px solid transparent;
}

.nav-link:hover {
    background-color: var(--sidebar-hover);
    color: #fff;
}

.nav-link.active {
    background-color: var(--sidebar-hover);
    color: #fff;
    border-left-color: var(--accent);
    box-shadow: inset 8px 0 20px -10px var(--accent);
}

.sidebar-footer {
    padding: 20px 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.theme-btn {
    background: none;
    color: rgba(255,255,255,0.7);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    width: 100%;
}

.theme-btn:hover { color: #fff; }

/* ---------- Main Content ---------- */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 24px 40px;
    transition: var(--transition);
    background: transparent;
}

/* Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.header-left { display: flex; align-items: center; gap: 16px; }

.header-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.global-search {
    background-color: var(--bg-card);
    padding: 10px 16px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    backdrop-filter: blur(5px);
    transition: var(--transition);
}

.global-search:hover { transform: scale(1.02); }

.global-search kbd {
    background-color: var(--bg-main);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.auth-container {
    display: flex;
    align-items: center;
    gap: 16px;
}

.profile-badge {
    display: flex;
    align-items: center;
    gap: 12px;
}

.profile-badge img {
    border-radius: 50%;
    width: 40px;
    height: 40px;
    box-shadow: var(--shadow);
}

.profile-name {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* Auth Modal Specifics */
.auth-tabs {
    display: flex;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border);
}

.auth-tab {
    flex: 1;
    background: none;
    padding: 12px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

.auth-tab:hover {
    color: var(--text-primary);
}

.auth-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.auth-form {
    display: none;
    animation: fadeUp 0.3s ease;
}

.auth-form.active {
    display: block;
}

/* Password Toggle Specifics */
.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-wrapper input {
    padding-right: 40px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: color 0.2s;
}

.toggle-password:hover {
    color: var(--accent);
}

.forgot-link {
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

.forgot-link:hover {
    text-decoration: underline;
    color: var(--accent-hover);
}

.btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    background-color: var(--bg-main);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-google:hover {
    background-color: var(--table-stripe);
    border-color: var(--text-secondary);
}

.btn-google img {
    width: 20px;
    height: 20px;
}

.auth-divider {
    text-align: center;
    margin: 20px 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background-color: var(--border);
    z-index: 1;
}

.auth-divider span {
    background-color: var(--bg-card);
    padding: 0 16px;
    color: var(--text-secondary);
    position: relative;
    z-index: 2;
    font-size: 0.9rem;
}

.btn-block {
    width: 100%;
}

/* Buttons */
.btn-primary {
    background-color: var(--accent);
    color: #fff;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 0 20px rgba(255, 49, 49, 0.4);
    transform: translateY(-2px);
}

.btn-text {
    background: none;
    color: var(--text-secondary);
    font-weight: 500;
}
.btn-text:hover { color: var(--accent); }

/* ---------- Dashboard Utilities ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background-color: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    gap: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.stat-card:hover {
    transform: scale(1.03) translateY(-4px);
    box-shadow: 0 0 25px rgba(255, 49, 49, 0.3);
    border-color: var(--accent);
}


.icon-box {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.icon-box.blue { background-color: rgba(37, 99, 235, 0.1); color: #3b82f6; }
.icon-box.green { background-color: rgba(16, 185, 129, 0.1); color: #10b981; }
.icon-box.yellow { background-color: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.icon-box.purple { background-color: rgba(139, 92, 246, 0.1); color: #8b5cf6; }

.stat-content p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 4px; font-family: 'Inter', sans-serif;}
.stat-content h3 { font-size: 1.8rem; color: var(--text-primary); font-family: 'Orbitron', sans-serif; }

/* Split Layout */
.dashboard-split {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.card {
    background-color: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h2 { font-size: 1.2rem; font-family: 'Orbitron', sans-serif; letter-spacing: 1px; }

/* Animated Progress Bars CSS Setup */
.capacity-row {
    margin-bottom: 24px;
}
.capacity-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    margin-bottom: 8px;
    font-weight: 500;
}
.capacity-bar-bg {
    height: 10px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 5px;
    overflow: hidden;
    position: relative;
}
.capacity-bar-fill {
    height: 100%;
    border-radius: 5px;
    transition: width 1.5s cubic-bezier(0.1, 0.7, 0.1, 1);
}

.quick-notice-item {
    border-left: 3px solid var(--accent);
    padding: 12px 16px;
    background-color: var(--bg-main);
    border-radius: 6px;
    margin-bottom: 12px;
}

.quick-notice-item h4 { font-size: 1rem; margin-bottom: 4px; }
.quick-notice-item p { font-size: 0.85rem; color: var(--text-secondary); }

/* ---------- Action Bars ---------- */
.action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.action-bar h2 { font-size: 1.4rem; }

.filters, .search-box {
    display: flex;
    gap: 12px;
}

select, .search-box input {
    padding: 10px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    backdrop-filter: blur(5px);
}

.search-box {
    align-items: center;
    background-color: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border);
    padding: 0 16px;
}

.search-box input { border: none; padding: 10px 0; background: none; }
.search-box i { color: var(--text-secondary); margin-right: 8px; }

select:focus, .search-box:focus-within {
    border-color: var(--accent);
}

/* ---------- Grid and Tables ---------- */
.dept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.dept-card {
    background-color: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    border-top: 4px solid var(--accent);
}

.dept-card h3 {
    margin-bottom: 16px;
    font-size: 1.25rem;
}

.dept-stats {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.subject-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.subject-section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn-add-subject {
    background: none;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
}
.btn-add-subject:hover { text-decoration: underline; }

.subject-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.subject-tag {
    background-color: var(--bg-main);
    color: var(--text-primary);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--border);
}

.subject-tag button {
    background: none;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.subject-tag button:hover {
    color: var(--danger);
}

.sec-stat {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.sec-stat span strong { color: var(--text-primary); }

/* Table Styles */
.table-card { padding: 0; overflow-x: auto; }

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background-color: rgba(255,255,255,0.05);
    font-weight: 500;
    color: var(--text-secondary);
}

.data-table th.sortable { cursor: pointer; transition: color 0.2s; }
.data-table th.sortable:hover { color: var(--text-primary); }

.data-table tr { transition: var(--transition); }
.data-table tr:hover { background-color: rgba(255, 49, 49, 0.05); }

.badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
}
.badge-a { background-color: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-b { background-color: rgba(37, 99, 235, 0.1); color: var(--accent); }

.action-btn { background: none; color: var(--text-secondary); transition: color 0.2s; font-size: 1.1rem; }
.action-btn:hover { color: var(--danger); }

/* ---------- Notices Grid ---------- */
.notice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.notice-card {
    background-color: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    position: relative;
    display: flex;
    flex-direction: column;
}

.notice-card h3 { font-size: 1.1rem; margin-bottom: 8px; line-height: 1.4; padding-right: 20px;}
.notice-card p.date { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 16px; }
.notice-card p.content { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.5; flex: 1; }

.del-notice {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    color: var(--text-secondary);
}
.del-notice:hover { color: var(--danger); }

/* ---------- Resources Grid ---------- */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.resource-card {
    background-color: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    backdrop-filter: blur(12px);
    position: relative;
    display: flex;
    flex-direction: column;
    border-left: 4px solid var(--accent);
}

.resource-card.pdf-type {
    border-left-color: var(--danger);
}

.resource-card h3 { font-size: 1.15rem; margin-bottom: 8px; line-height: 1.4; padding-right: 30px;}
.resource-card p.date { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 12px; }
.resource-card p.content { color: var(--text-primary); font-size: 0.95rem; line-height: 1.5; flex: 1; margin-bottom: 16px; white-space: pre-wrap; }

.resource-card .res-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-weight: 500;
    margin-top: auto;
}

.resource-card .res-link:hover { text-decoration: underline; }

.del-resource {
    position: absolute;
    top: 24px;
    right: 24px;
    background: none;
    color: var(--text-secondary);
}
.del-resource:hover { color: var(--danger); }

/* ---------- Attendance Styles ---------- */
.att-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.att-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-slider {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
    background-color: var(--danger);
    border-radius: 30px;
    transition: var(--transition);
    margin-right: 10px;
}

.toggle-slider::before {
    content: "";
    position: absolute;
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.att-toggle input:checked + .toggle-slider {
    background-color: var(--success);
}

.att-toggle input:checked + .toggle-slider::before {
    transform: translateX(30px);
}

.toggle-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--danger);
    transition: var(--transition);
    min-width: 60px;
    text-align: left;
}

.att-toggle input:checked ~ .toggle-label {
    color: var(--success);
}

.status-present { color: var(--success); font-weight: bold; }
.status-absent { color: var(--danger); font-weight: bold; }

/* ---------- Modals ---------- */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    backdrop-filter: blur(4px);
    transition: var(--transition);
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal-box {
    background-color: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: var(--transition);
}

.modal-backdrop.active .modal-box {
    transform: translateY(0) scale(1);
}

.modal-lg { max-width: 700px; }

.modal-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.close-btn { background: none; font-size: 1.2rem; color: var(--text-secondary); }
.close-btn:hover { color: var(--danger); }

.form-group { margin-bottom: 20px; }
.form-row { display: flex; gap: 16px; }
.form-row .form-group { flex: 1; }

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background-color: var(--bg-main);
    color: var(--text-primary);
    outline: none;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent);
}

.modal-foot {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 32px;
}

/* Global Search Modal Overlay */
.search-box-modal {
    padding: 0;
    overflow: hidden;
}

.search-box-modal .modal-head {
    margin: 0;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
    align-items: center;
    justify-content: flex-start;
}

.search-box-modal .search-icon { font-size: 1.2rem; color: var(--text-secondary); }

.search-box-modal input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.search-box-modal .close-btn { margin-left: auto; }

.search-results {
    max-height: 400px;
    overflow-y: auto;
}

.search-item {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.search-item:hover { background-color: var(--table-stripe); }
.search-item strong { color: var(--text-primary); }
.search-item span { font-size: 0.85rem; color: var(--text-secondary); }

/* ---------- Toasts ---------- */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background-color: var(--text-primary);
    color: var(--bg-main);
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.1, 0.7, 0.1, 1);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.error { background-color: var(--danger); color: white;}
.toast.success { background-color: var(--success); color: white;}

/* ---------- Empty States ---------- */
.empty-state {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ---------- Responsive Adjustments ---------- */
@media (max-width: 1024px) {
    .dashboard-split { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); width: 280px; }
    .sidebar.active { transform: translateX(0); }
    .main-content { margin-left: 0; padding: 16px; }
    .mobile-toggle { display: block; }
    .form-row { flex-direction: column; gap: 0; }
    .global-search { display: none; }
    .action-bar { flex-direction: column; align-items: stretch; }
}