@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800;900&display=swap');

:root {
    --primary: #1B2A6B;
    --primary-light: #2E3E85;
    --primary-dark: #0F1A4A;
    --accent: #F5A623;
    --accent-hover: #D98E18;
    --bg-main: #F8FAFC;
    --bg-sidebar: #0E183E;
    --card-bg: #FFFFFF;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --text-white: #FFFFFF;
    --border-color: #E2E8F0;
    
    --success: #10B981;
    --success-light: #E6F4EA;
    --danger: #EF4444;
    --danger-light: #FCE8E6;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.04);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode overrides (optional and setting-based) */
.dark-theme {
    --bg-main: #0B0F19;
    --card-bg: #151D30;
    --text-main: #F1F5F9;
    --text-muted: #94A3B8;
    --border-color: #1E293B;
}

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

body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: var(--transition);
}

a {
    color: inherit;
    text-decoration: none;
}

button, input, select, textarea {
    font-family: inherit;
}

/* ─────────────────────────────────────────────────────────────────────────
   LAYOUTS
   ───────────────────────────────────────────────────────────────────────── */

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

.admin-sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-logo {
    height: 40px;
    width: auto;
}

.sidebar-brand {
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text-white);
    letter-spacing: 0.5px;
    display: flex;
    flex-direction: column;
}

.sidebar-brand span {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--accent);
    letter-spacing: 1px;
}

.sidebar-menu {
    list-style: none;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-grow: 1;
    overflow-y: auto;
}

.sidebar-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.925rem;
    font-weight: 500;
    transition: var(--transition);
}

.sidebar-item a:hover {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-white);
}

.sidebar-item.active a {
    background-color: var(--accent);
    color: var(--primary-dark);
    font-weight: 600;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.admin-content {
    flex-grow: 1;
    margin-left: 260px;
    padding: 30px 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.admin-header-title h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.admin-header-title p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 2px;
}

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

.admin-user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: var(--radius-full);
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
}

.admin-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: var(--primary);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

/* Student Layout (Mobile First Container) */
.student-layout {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    background-color: var(--bg-main);
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 0 0 40px rgba(15, 23, 42, 0.06);
}

.student-header {
    background-color: var(--primary);
    color: var(--text-white);
    padding: 24px 20px 48px 20px;
    border-bottom-left-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
    position: relative;
}

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

.student-udinus-badge {
    display: flex;
    align-items: center;
    gap: 8px;
}

.student-udinus-badge img {
    height: 28px;
    width: auto;
}

.student-udinus-badge span {
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.student-profile-summary {
    display: flex;
    align-items: center;
    gap: 16px;
}

.student-profile-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    border: 3px solid rgba(255, 255, 255, 0.2);
    object-fit: cover;
}

.student-profile-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.student-profile-info p {
    font-size: 0.825rem;
    color: rgba(255, 255, 255, 0.7);
}

.student-body {
    flex-grow: 1;
    padding: 20px;
    margin-top: -30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 100px; /* Space for bottom nav */
}

.student-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 480px;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    z-index: 100;
    box-shadow: 0 -4px 12px rgba(15, 23, 42, 0.03);
}

.student-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 0.725rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
}

.student-nav-item i {
    font-size: 1.25rem;
}

.student-nav-item:hover, .student-nav-item.active {
    color: var(--primary);
}

.student-nav-item.active {
    font-weight: 700;
}

/* ─────────────────────────────────────────────────────────────────────────
   COMPONENTS
   ───────────────────────────────────────────────────────────────────────── */

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary);
}

.card-body {
    padding: 24px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-white);
}

.btn-primary:hover {
    background-color: var(--primary-light);
}

.btn-accent {
    background-color: var(--accent);
    color: var(--primary-dark);
}

.btn-accent:hover {
    background-color: var(--accent-hover);
}

.btn-secondary {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--bg-main);
}

.btn-danger {
    background-color: var(--danger);
    color: var(--text-white);
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-full {
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-main);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.15);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-present {
    background-color: var(--success-light);
    color: var(--success);
}

.badge-late {
    background-color: var(--warning-light);
    color: var(--warning);
}

.badge-rejected {
    background-color: var(--danger-light);
    color: var(--danger);
}

.badge-active {
    background-color: var(--success-light);
    color: var(--success);
}

.badge-inactive {
    background-color: var(--border-color);
    color: var(--text-muted);
}

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

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.table th {
    padding: 14px 20px;
    background-color: rgba(27, 42, 107, 0.03);
    color: var(--primary);
    font-weight: 700;
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background-color: rgba(27, 42, 107, 0.01);
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.pagination-info {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.pagination-links {
    display: flex;
    gap: 6px;
}

/* Stats Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.stat-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-val {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-dark);
    line-height: 1.2;
    margin-top: 2px;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

/* Alert Notification */
.alert {
    padding: 12px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-weight: 500;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background-color: var(--success-light);
    color: #065f46;
    border-left: 4px solid var(--success);
}

.alert-danger {
    background-color: var(--danger-light);
    color: #991b1b;
    border-left: 4px solid var(--danger);
}

/* ─────────────────────────────────────────────────────────────────────────
   FACE RECOGNITION WEBCAM SCANNER
   ───────────────────────────────────────────────────────────────────────── */
.scanner-viewfinder {
    position: relative;
    width: 100%;
    max-width: 380px;
    aspect-ratio: 4/3;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: #000000;
    border: 3px solid var(--primary-light);
    box-shadow: var(--shadow-lg);
}

.scanner-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1); /* mirror */
}

/* Oval overlay frame for face positioning */
.scanner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scanner-frame {
    width: 60%;
    height: 75%;
    border: 3px dashed var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 9999px rgba(15, 23, 42, 0.4);
    transition: var(--transition);
}

.scanner-overlay.active .scanner-frame {
    border-color: var(--success);
    border-style: solid;
    animation: scanner-pulse 1.5s infinite alternate;
}

.scanner-overlay.error .scanner-frame {
    border-color: var(--danger);
    border-style: solid;
}

/* Scan line moving effect */
.scanner-scanline {
    position: absolute;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, transparent, var(--accent), transparent);
    top: 0;
    left: 0;
    display: none;
    z-index: 10;
}

.scanner-overlay.active .scanner-scanline {
    display: block;
    animation: scanline-move 2.5s infinite linear;
}

@keyframes scanline-move {
    0% { top: 10%; }
    50% { top: 90%; }
    100% { top: 10%; }
}

@keyframes scanner-pulse {
    0% { box-shadow: 0 0 0 9999px rgba(16, 185, 129, 0.3), inset 0 0 15px rgba(16, 185, 129, 0.3); }
    100% { box-shadow: 0 0 0 9999px rgba(16, 185, 129, 0.5), inset 0 0 30px rgba(16, 185, 129, 0.5); }
}

/* ── Login Pages Style ────────────────────────────────────────────────── */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: radial-gradient(circle at 10% 20%, rgb(14, 24, 62) 0%, rgb(27, 42, 107) 90.1%);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    overflow: hidden;
}

.auth-header {
    background-color: var(--primary);
    padding: 30px 20px;
    text-align: center;
    color: var(--text-white);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.auth-logo {
    height: 64px;
    width: auto;
}

.auth-title {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.auth-subtitle {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: -6px;
}

.auth-body {
    padding: 30px;
}

/* ── Menu Grid Student ─────────────────────────────────────────────── */
.student-menu-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.student-menu-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 10px;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.student-menu-item:active, .student-menu-item:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.student-menu-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
}

.icon-blue { background-color: rgba(14, 165, 233, 0.1); color: #0ea5e9; }
.icon-orange { background-color: rgba(245, 166, 35, 0.1); color: #f5a623; }
.icon-green { background-color: rgba(16, 185, 129, 0.1); color: #10b981; }
.icon-purple { background-color: rgba(139, 92, 246, 0.1); color: #8b5cf6; }
.icon-red { background-color: rgba(239, 68, 68, 0.1); color: #ef4444; }

/* ── Custom Loader ─────────────────────────────────────────────────── */
.loader-spinner {
    border: 3px solid rgba(27, 42, 107, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: var(--primary);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ── Camera Flash Effect ───────────────────────────────────────────── */
.camera-flash {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    opacity: 0;
    pointer-events: none;
    z-index: 1000;
    transition: opacity 0.2s ease-out;
}
.camera-flash.flash-active {
    opacity: 1;
    transition: none; /* instant white flash */
}

/* ── STUDENT HISTORY RESPONSIVE SPLIT SCREEN & ELEVATION ─────────────────── */
.student-history-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.history-item {
    transition: all 0.2s ease-in-out;
}

.history-item:hover {
    background-color: rgba(27, 42, 107, 0.02);
    padding-left: 8px;
    padding-right: 8px;
    border-radius: var(--radius-sm);
}

.history-item:hover .thumbnail-wrapper {
    border-color: var(--primary) !important;
    box-shadow: 0 0 8px rgba(27, 42, 107, 0.15);
}

.history-item:hover .thumbnail-wrapper img {
    transform: scale(1.1);
}

/* Tablet & Desktop Layouts */
@media (min-width: 768px) {
    .student-layout {
        max-width: 900px !important;
        box-shadow: 0 0 50px rgba(15, 23, 42, 0.1);
    }
    
    .student-nav {
        max-width: 900px !important;
    }
    
    .student-header {
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    }
    
    .student-history-wrapper {
        display: grid;
        grid-template-columns: 280px 1fr;
        gap: 24px;
        align-items: start;
    }
    
    .student-history-sidebar {
        position: sticky;
        top: 20px;
    }
}