@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.65);
    --border-glass: rgba(255, 255, 255, 0.06);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --primary: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.4);
    --secondary: #a855f7;
    --accent: #ec4899;
    
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.2);
    --warning: #f59e0b;
    --warning-glow: rgba(245, 158, 11, 0.2);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.2);
    
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-premium: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --blur-glass: 16px;
    --bg-input: rgba(31, 41, 55, 0.5);
}

:root.light-mode {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --border-glass: rgba(0, 0, 0, 0.08);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --bg-input: rgba(255, 255, 255, 0.9);
    --shadow-premium: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

:root.light-mode body {
    background-image: 
        radial-gradient(at 10% 10%, rgba(99, 102, 241, 0.06) 0px, transparent 50%),
        radial-gradient(at 90% 80%, rgba(168, 85, 247, 0.06) 0px, transparent 50%);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(at 10% 10%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 90% 80%, rgba(168, 85, 247, 0.15) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(236, 72, 153, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
}

/* Glassmorphism Class */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(var(--blur-glass));
    -webkit-backdrop-filter: blur(var(--blur-glass));
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    box-shadow: var(--shadow-premium);
}

.glass-input {
    width: 100%;
    max-width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 10px 14px;
    outline: none;
    transition: var(--transition-fast);
}

.glass-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
    background: rgba(31, 41, 55, 0.8);
}

/* Custom Buttons */
.btn-premium {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
    filter: brightness(1.1);
}

.btn-premium:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #b91c1c);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
    filter: brightness(1.1);
}

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

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition-normal);
}

.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-glass);
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px var(--primary-glow);
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 20px;
    font-weight: 800;
    background: linear-gradient(to right, #ffffff, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-menu {
    list-style: none;
    padding: 20px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
    overflow-y: auto;
}

.menu-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 12px 16px;
    border-radius: 12px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.menu-item a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.05);
}

.menu-item.active a {
    color: #ffffff;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
    border: 1px solid rgba(99, 102, 241, 0.2);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.1);
}

.sidebar-footer {
    padding: 20px 14px;
    border-top: 1px solid var(--border-glass);
}

.user-profile-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
}

.profile-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-family: 'Outfit', sans-serif;
}

.profile-info {
    flex-grow: 1;
    min-width: 0;
}

.profile-name {
    font-size: 14px;
    font-weight: 600;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-role {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.logout-btn {
    color: var(--danger);
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Main Content Wrapper */
.main-wrapper {
    margin-left: 260px;
    width: calc(100% - 260px);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: var(--transition-normal);
}

.top-navbar {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    border-bottom: 1px solid var(--border-glass);
    background: rgba(11, 15, 25, 0.6);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 99;
}

.page-title h2 {
    font-size: 24px;
    color: #ffffff;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.main-content {
    flex-grow: 1;
    padding: 30px;
    animation: fadeInUp var(--transition-normal);
}

/* Animation Definition */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Metrics Dashboard Cards */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-fast);
}

.metric-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
}

.metric-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.metric-title {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.metric-icon-box {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.metric-card.primary .metric-icon-box { background: rgba(99, 102, 241, 0.15); color: var(--primary); }
.metric-card.success .metric-icon-box { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.metric-card.warning .metric-icon-box { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.metric-card.danger .metric-icon-box { background: rgba(239, 68, 68, 0.15); color: var(--danger); }

.metric-value {
    font-size: 32px;
    font-weight: 800;
    color: #ffffff;
    font-family: 'Outfit', sans-serif;
    line-height: 1;
    margin-bottom: 6px;
}

.metric-sub {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Dashboard Analytics Row */
.analytics-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 25px;
    margin-bottom: 30px;
}

@media (max-width: 1024px) {
    .analytics-row {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    padding: 24px;
}

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

.chart-title h3 {
    font-size: 18px;
    color: #ffffff;
}

/* Table styling */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.premium-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    margin-top: 10px;
}

.premium-table th {
    padding: 14px 20px;
    font-size: 12px;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
    border-bottom: 1px solid var(--border-glass);
    letter-spacing: 0.5px;
}

.premium-table td {
    padding: 16px 20px;
    font-size: 14px;
    border-bottom: 1px solid var(--border-glass);
    color: #e5e7eb;
}

.premium-table tr {
    transition: var(--transition-fast);
}

.premium-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge.success { background: rgba(16, 185, 129, 0.12); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge.warning { background: rgba(245, 158, 11, 0.12); color: var(--warning); border: 1px solid rgba(245, 158, 11, 0.2); }
.badge.danger { background: rgba(239, 68, 68, 0.12); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }

/* Rooms Visualizer Grid */
.rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.room-card {
    padding: 20px;
    border-radius: 16px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-fast);
}

.room-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-premium);
}

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

.room-number {
    font-size: 20px;
    font-weight: bold;
    color: #ffffff;
}

.room-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.room-detail-item {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
}

.capacity-indicator {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.capacity-progress {
    height: 100%;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 10px;
    transition: width 0.5s ease;
}

.capacity-progress.full {
    background: linear-gradient(to right, var(--danger), #dc2626);
}

/* Modals styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    width: 500px;
    max-width: 90%;
    transform: scale(0.9);
    transition: var(--transition-normal);
    padding: 30px;
}

.modal-overlay.active .modal-box {
    transform: scale(1);
}

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

.modal-title {
    font-size: 20px;
    color: #ffffff;
}

.modal-close {
    cursor: pointer;
    color: var(--text-secondary);
    background: none;
    border: none;
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: #ffffff;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* Student Profile Cards */
.students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.student-card {
    padding: 20px;
    display: flex;
    gap: 16px;
    align-items: center;
}

.student-avatar-box {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid var(--border-glass);
    background: rgba(31, 41, 55, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
}

.student-avatar-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.student-avatar-placeholder {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    font-family: 'Outfit', sans-serif;
}

.student-card-details {
    flex-grow: 1;
    min-width: 0;
}

.student-card-name {
    font-size: 16px;
    color: #ffffff;
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.student-card-roll {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.student-card-meta {
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Attendance Check-in Board */
.attendance-layout {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.attendance-card-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.attendance-student-card {
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    transition: var(--transition-fast);
}

.attendance-student-card:hover {
    transform: translateY(-2px);
    border-color: rgba(99, 102, 241, 0.2);
}

.attendance-student-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    margin-bottom: 12px;
    border: 2px solid var(--border-glass);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(31, 41, 55, 0.4);
}

.attendance-student-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.attendance-status-selector {
    display: flex;
    width: 100%;
    border-radius: 8px;
    background: rgba(31, 41, 55, 0.5);
    padding: 4px;
    margin-top: 15px;
    border: 1px solid var(--border-glass);
}

.status-option {
    flex: 1;
    text-align: center;
    font-size: 11px;
    font-weight: 600;
    padding: 6px 0;
    cursor: pointer;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.status-option.present.active { background: var(--success); color: #ffffff; box-shadow: 0 2px 8px var(--success-glow); }
.status-option.absent.active { background: var(--danger); color: #ffffff; box-shadow: 0 2px 8px var(--danger-glow); }
.status-option.late.active { background: var(--warning); color: #ffffff; box-shadow: 0 2px 8px var(--warning-glow); }

.attendance-remarks-input {
    width: 100%;
    margin-top: 10px;
    font-size: 12px;
    padding: 6px 10px;
}

/* Filter controls bar */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 20px;
    margin-bottom: 25px;
    align-items: flex-end;
}

.filter-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    min-width: 160px;
}

.filter-item label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Floating Actions Alert */
.success-alert {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--success);
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--success-glow);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideInRight 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Custom Checkbox toggle styling */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* Mobile responsive hamburger and controls */
.mobile-nav-toggle {
    display: none;
    cursor: pointer;
    color: #ffffff;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-wrapper {
        margin-left: 0;
        width: 100%;
    }
    
    .mobile-nav-toggle {
        display: block;
    }
    
    .top-navbar {
        padding: 0 20px;
    }
    
    .main-content {
        padding: 20px;
    }
}