/* ===================================================
   KlassKeep - Main Stylesheet
   "Keep it simple. Keep it secure."
   Design 3C - Teal/Multi-color Theme
   =================================================== */

/* ==================== CSS Variables ==================== */
:root {
    /* Brand Colors */
    --kk-dark-teal: #123038;
    --kk-teal: #46a8aa;
    --kk-teal-light: #5fc4c6;
    --kk-teal-dark: #0d9488;
    
    /* Accent Colors */
    --kk-purple: #7c3aed;
    --kk-purple-light: #a78bfa;
    --kk-pink: #f472b6;
    --kk-amber: #fbbf24;
    --kk-blue: #3b82f6;
    --kk-green: #22c55e;
    --kk-red: #ef4444;
    
    /* Neutrals */
    --kk-gray-50: #f9fafb;
    --kk-gray-100: #f3f4f6;
    --kk-gray-200: #e5e7eb;
    --kk-gray-300: #d1d5db;
    --kk-gray-400: #9ca3af;
    --kk-gray-500: #6b7280;
    --kk-gray-600: #4b5563;
    --kk-gray-700: #374151;
    --kk-gray-800: #1f2937;
    --kk-gray-900: #111827;

    /* Status Colors (used by alerts, badges, grades, kk-alert icons) */
    --kk-success-bg: #dcfce7;
    --kk-success-text: #166534;
    --kk-danger-bg: #fee2e2;
    --kk-danger-text: #991b1b;
    --kk-warning-bg: #fef3c7;
    --kk-warning-text: #92400e;
    --kk-info-bg: #dbeafe;
    --kk-info-text: #1e40af;

    /* Grade Colors */
    --kk-grade-excellent: #16a34a;
    --kk-grade-passing: #d97706;
    --kk-grade-failing: #dc2626;
    --kk-grade-absent: #9ca3af;

    /* Impersonation / Owner */
    --kk-gold: #ffd700;
    --kk-gold-dark: #ffaa00;

    /* Gradients */
    --gradient-sidebar: linear-gradient(180deg, var(--kk-dark-teal) 0%, #1a4a54 50%, #0d3a40 100%);
    --gradient-primary: linear-gradient(135deg, var(--kk-teal) 0%, var(--kk-teal-dark) 100%);
    --gradient-background: linear-gradient(135deg, #ecfdf5 0%, #f0f9ff 50%, #fdf4ff 100%);
    
    /* Typography */
    --font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --sidebar-width: 260px;
    --header-height: 70px;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 25px rgba(18, 48, 56, 0.15);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

/* ==================== Base Styles ==================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--gradient-background);
    color: var(--kk-gray-800);
    min-height: 100vh;
    line-height: 1.6;
}

/* ==================== App Layout ==================== */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content.full-width {
    margin-left: 0;
}

.content-wrapper {
    padding: 24px;
    flex: 1;
}

/* ==================== Sidebar ==================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--gradient-sidebar);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo img {
    height: 32px;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
    overflow-y: auto;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-section {
    padding: 16px 24px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.5);
}

.nav-item {
    margin: 4px 12px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    font-weight: 500;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-link.active {
    background: white;
    color: var(--kk-dark-teal);
}

.nav-link i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

/* ── Expandable Sidebar Groups (Accordion) ── */
.nav-group-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
    margin-top: 2px;
}

.nav-group-header:hover {
    color: rgba(255, 255, 255, 0.8);
}

.nav-group-header i.group-icon {
    font-size: 1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.nav-group-header .chevron {
    margin-left: auto;
    font-size: 0.6rem;
    transition: transform 0.3s ease;
    opacity: 0.6;
}

.nav-group-header.open .chevron {
    transform: rotate(90deg);
    opacity: 1;
}

.nav-group-header.open {
    color: rgba(255, 255, 255, 0.7);
}

.nav-group-items {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-group-items.open {
    max-height: 500px;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--kk-teal);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.sidebar .user-name {
    color: white;
    font-weight: 500;
    font-size: 0.875rem;
}

.user-role {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
}

.logout-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.install-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    text-decoration: none;
}

.install-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

/* ==================== Top Header ==================== */
.top-header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--kk-gray-200);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
}

.menu-toggle {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--kk-gray-100);
    border-radius: var(--radius-sm);
    font-size: 1.5rem;
    color: var(--kk-gray-600);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.header-title h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--kk-dark-teal);
    margin: 0;
}

.header-actions {
    margin-left: auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

/* ==================== Flash Messages ==================== */
.flash-messages {
    padding: 16px 24px 0;
}

.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert i {
    font-size: 1.25rem;
}

.alert-success {
    background: var(--kk-success-bg);
    color: var(--kk-success-text);
}

.alert-danger {
    background: var(--kk-danger-bg);
    color: var(--kk-danger-text);
}

.alert-warning {
    background: var(--kk-warning-bg);
    color: var(--kk-warning-text);
}

.alert-info {
    background: var(--kk-info-bg);
    color: var(--kk-info-text);
}

/* ==================== Stats Cards ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.stat-card.stat-teal::before { background: var(--kk-teal); }
.stat-card.stat-purple::before { background: #7c8db5; }
.stat-card.stat-amber::before { background: #b8956a; }
.stat-card.stat-pink::before { background: #a8808c; }
.stat-card.stat-green::before { background: #6a9e7e; }

.stat-icon {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-teal .stat-icon { background: #e0f7f7; color: var(--kk-teal); }
.stat-purple .stat-icon { background: #e8ecf4; color: #5a6d8f; }
.stat-amber .stat-icon { background: #f5eddf; color: #8f6d3f; }
.stat-pink .stat-icon { background: #f2e6ea; color: #7d5566; }
.stat-green .stat-icon { background: #e2f0e8; color: #4a7a5e; }

.stat-content {
    flex: 1;
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--kk-gray-900);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--kk-gray-500);
}

.stat-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--kk-gray-100);
    color: var(--kk-gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.stat-link:hover {
    background: var(--kk-teal);
    color: white;
}

/* ==================== Dashboard Cards ==================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.dashboard-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--kk-gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--kk-dark-teal);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
}

.card-header h3 i {
    color: var(--kk-teal);
}

.view-all-link {
    font-size: 0.875rem;
    color: var(--kk-teal);
    text-decoration: none;
    font-weight: 500;
}

.view-all-link:hover {
    color: var(--kk-teal-dark);
}

.card-body {
    padding: 20px;
}

/* ==================== Quick Actions ==================== */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    background: var(--kk-gray-50);
    border-radius: var(--radius-md);
    color: var(--kk-gray-700);
    text-decoration: none;
    transition: all 0.2s ease;
    text-align: center;
}

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

.quick-action-btn i {
    font-size: 1.5rem;
}

.quick-action-btn span {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ==================== Recent Lists ==================== */
.recent-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--kk-gray-50);
    border-radius: var(--radius-md);
    transition: background 0.2s ease;
}

.recent-item:hover {
    background: var(--kk-gray-100);
}

.item-avatar {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

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

.item-name {
    display: block;
    font-weight: 500;
    color: var(--kk-gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.item-meta {
    display: block;
    font-size: 0.75rem;
    color: var(--kk-gray-500);
}

.item-action {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--kk-gray-400);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.item-action:hover {
    background: var(--kk-teal);
    color: white;
}

/* ==================== Empty States ==================== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--kk-gray-500);
}

.empty-state.small {
    padding: 20px;
}

.empty-state i {
    font-size: 2.5rem;
    margin-bottom: 12px;
    opacity: 0.5;
}

.empty-state p {
    margin-bottom: 16px;
}

/* ==================== Progress Bars ==================== */
.progress-bar-wrapper {
    margin-top: 12px;
}

.progress {
    height: 8px;
    background: var(--kk-gray-200);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    background: var(--gradient-primary);
    height: 100%;
    transition: width 0.3s ease;
}

.progress-label {
    display: block;
    font-size: 0.75rem;
    color: var(--kk-gray-500);
    margin-top: 6px;
}

/* ==================== Term Info ==================== */
.term-info h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--kk-dark-teal);
    margin-bottom: 4px;
}

.term-dates {
    color: var(--kk-gray-500);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* ==================== Buttons ==================== */
.btn {
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-family: var(--font-family);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(70, 168, 170, 0.4);
    color: white;
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--kk-teal);
    color: var(--kk-teal);
}

.btn-outline-primary:hover {
    background: var(--kk-teal);
    color: white;
}

/* ==================== Forms ==================== */
.form-label {
    font-weight: 500;
    color: var(--kk-gray-700);
    margin-bottom: 6px;
}

.form-control {
    padding: 10px 14px;
    border: 1px solid var(--kk-gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.9375rem;
    transition: all 0.2s ease;
}

.form-control:focus {
    border-color: var(--kk-teal);
    box-shadow: 0 0 0 3px rgba(70, 168, 170, 0.2);
    outline: none;
}

.form-select {
    padding: 10px 14px;
    border: 1px solid var(--kk-gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    transition: all 0.2s ease;
}

.form-select:focus {
    border-color: var(--kk-teal);
    box-shadow: 0 0 0 3px rgba(70, 168, 170, 0.2);
    outline: none;
}

/* ==================== Auth Pages ==================== */
.auth-page {
    background: var(--gradient-background);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-container {
    position: relative;
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    position: relative;
    z-index: 10;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo {
    height: 48px;
    margin-bottom: 12px;
}

.auth-tagline {
    color: var(--kk-gray-500);
    font-size: 0.875rem;
    margin: 0;
}

.auth-form .form-group {
    margin-bottom: 20px;
}

.input-icon-wrapper {
    position: relative;
}

.input-icon-wrapper > i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--kk-gray-400);
}

.input-icon-wrapper .form-control {
    padding-left: 42px;
    padding-right: 42px;
}

.password-toggle {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--kk-gray-400);
    cursor: pointer;
    padding: 4px;
}

.password-toggle:hover {
    color: var(--kk-gray-600);
}

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

.forgot-link {
    color: var(--kk-teal);
    font-size: 0.875rem;
    text-decoration: none;
}

.forgot-link:hover {
    color: var(--kk-teal-dark);
}

.btn-login {
    width: 100%;
    padding: 12px 20px;
    font-size: 1rem;
}

.google-divider {
    display: flex;
    align-items: center;
    margin: 20px 0;
    color: var(--kk-gray-400);
    font-size: 0.875rem;
}
.google-divider::before,
.google-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--kk-gray-200);
}
.google-divider span {
    padding: 0 12px;
}

.btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 11px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    color: #3c4043;
    background: #fff;
    border: 1px solid #dadce0;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.2s, box-shadow 0.2s;
}
.btn-google:hover {
    background: #f7f8f8;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    color: #3c4043;
    text-decoration: none;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--kk-gray-100);
}

.auth-footer p {
    color: var(--kk-gray-400);
    font-size: 0.75rem;
    margin: 0;
}

.auth-footer .legal-links {
    margin-bottom: 8px;
}

.auth-footer .legal-links a {
    color: var(--kk-gray-500);
    text-decoration: none;
    transition: color 0.2s;
}

.auth-footer .legal-links a:hover {
    color: var(--kk-teal);
    text-decoration: underline;
}

.auth-footer .legal-links .separator {
    margin: 0 8px;
    color: var(--kk-gray-300);
}

/* Auth Decorations */
.auth-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.circle-1 {
    width: 200px;
    height: 200px;
    background: var(--kk-teal);
    top: -100px;
    right: -50px;
}

.circle-2 {
    width: 150px;
    height: 150px;
    background: var(--kk-purple);
    bottom: -75px;
    left: -50px;
}

.circle-3 {
    width: 100px;
    height: 100px;
    background: var(--kk-amber);
    top: 50%;
    right: -30px;
}

/* ==================== Tables ==================== */
.table-wrapper {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.table {
    margin: 0;
}

.table thead th {
    background: var(--kk-gray-50);
    border-bottom: 2px solid var(--kk-gray-200);
    font-weight: 600;
    color: var(--kk-gray-700);
    padding: 14px 16px;
    white-space: nowrap;
}

.table tbody td {
    padding: 14px 16px;
    vertical-align: middle;
    border-bottom: 1px solid var(--kk-gray-100);
}

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

.table tbody tr:hover {
    background: var(--kk-gray-50);
}

/* ==================== Badges ==================== */
.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.75rem;
}

.badge-success {
    background: var(--kk-success-bg);
    color: var(--kk-success-text);
}

.badge-warning {
    background: var(--kk-warning-bg);
    color: var(--kk-warning-text);
}

.badge-danger {
    background: var(--kk-danger-bg);
    color: var(--kk-danger-text);
}

.badge-info {
    background: var(--kk-info-bg);
    color: var(--kk-info-text);
}

/* ==================== Responsive ==================== */
@media (max-width: 991.98px) {
    html, body {
        overflow-x: hidden;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .menu-toggle {
        display: flex;
    }
}

@media (max-width: 767.98px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .content-wrapper {
        padding: 16px;
    }
    
    .auth-card {
        padding: 24px;
    }
}

@media (max-width: 575.98px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
}

/* ==================== Impersonation Banner ==================== */
.impersonation-banner {
    background: linear-gradient(135deg, var(--kk-gold) 0%, var(--kk-gold-dark) 100%);
    color: #000;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px rgba(255, 170, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

.impersonation-banner .banner-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.impersonation-banner i {
    font-size: 1.25rem;
}

.impersonation-banner .btn-light {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
}

.impersonation-banner .btn-light:hover {
    background: white;
}

/* ==================== D3/D4 Grade Utilities ==================== */
.grade-excellent { color: var(--kk-grade-excellent); }
.grade-passing { color: var(--kk-grade-passing); }
.grade-failing { color: var(--kk-grade-failing); }
.grade-absent { color: var(--kk-grade-absent); }
.grade-bg-excellent { background-color: var(--kk-success-bg); }
.grade-bg-passing { background-color: var(--kk-warning-bg); }
.grade-bg-failing { background-color: var(--kk-danger-bg); }
.grade-bg-absent { background-color: var(--kk-gray-100); }

.gradebook-table th { font-size: 0.75rem; white-space: nowrap; }
.gradebook-table td { text-align: center; padding: 0.25rem 0.5rem; }

/* ==================== Pagination Bar ==================== */
.pagination-bar .page-link {
    border: none;
    color: var(--kk-gray-600);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    margin: 0 1px;
}
.pagination-bar .page-item.active .page-link {
    background: var(--kk-teal);
    color: white;
}
.pagination-bar .page-link:hover {
    background: var(--kk-gray-100);
    color: var(--kk-gray-800);
}

/* Owner Badge in Sidebar */
.owner-badge {
    background: linear-gradient(135deg, var(--kk-gold) 0%, var(--kk-gold-dark) 100%);
    color: #000;
    font-size: 0.625rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    margin-left: auto;
}

/* ── Parent Sidebar: Child Selector ── */
.sidebar-child-selector {
    padding: 1rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: auto;
}
.child-selector-label {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    display: block;
}
.child-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.child-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: 8px;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.2s;
}
.child-item:hover {
    background: rgba(255,255,255,0.1);
    color: white;
}
.child-item.active {
    background: rgba(255,255,255,0.2);
    color: white;
}
.child-item .child-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

/* E3: Teacher Class Selector */
.sidebar-class-selector {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.sidebar-class-selector.single {
    padding: 0.6rem 1rem;
}
.class-selector-label {
    font-size: 0.7rem;
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    display: block;
}
.sidebar-class-selector.single .class-selector-label {
    margin-bottom: 0;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.8);
}
.class-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}
.class-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.65rem;
    border-radius: 8px;
    color: rgba(255,255,255,0.75);
    text-decoration: none;
    font-size: 0.8rem;
    transition: all 0.2s;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
}
.class-item:hover {
    background: rgba(255,255,255,0.15);
    color: white;
}
.class-item.active {
    background: rgba(255,255,255,0.2);
    color: white;
    border-color: rgba(255,255,255,0.3);
    font-weight: 600;
}
.class-badge {
    font-weight: 700;
}
.class-grade {
    font-size: 0.7rem;
    opacity: 0.75;
}

/* ==================== KK Alert (custom alert replacement) ==================== */
.kk-alert-overlay {
    position: fixed;
    inset: 0;
    background: rgba(18, 48, 56, 0.45);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
    padding: 1rem;
}
.kk-alert-overlay.show { opacity: 1; }

.kk-alert-box {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(18, 48, 56, 0.25);
    max-width: 400px;
    width: 100%;
    transform: translateY(12px) scale(0.97);
    transition: transform 0.2s;
    overflow: hidden;
}
.kk-alert-overlay.show .kk-alert-box {
    transform: translateY(0) scale(1);
}

.kk-alert-stripe {
    height: 4px;
}
.kk-alert-stripe.error { background: var(--kk-red); }
.kk-alert-stripe.warning { background: var(--kk-amber); }
.kk-alert-stripe.success { background: var(--kk-green); }
.kk-alert-stripe.info { background: var(--kk-teal); }

.kk-alert-body {
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.kk-alert-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.125rem;
}
.kk-alert-icon.error { background: var(--kk-danger-bg); color: var(--kk-red); }
.kk-alert-icon.warning { background: var(--kk-warning-bg); color: var(--kk-warning-text); }
.kk-alert-icon.success { background: var(--kk-success-bg); color: var(--kk-green); }
.kk-alert-icon.info { background: rgba(70, 168, 170, 0.12); color: var(--kk-teal); }

.kk-alert-text {
    flex: 1;
    min-width: 0;
}
.kk-alert-title {
    font-weight: 600;
    color: var(--kk-dark-teal);
    margin-bottom: 0.25rem;
    font-size: 0.9375rem;
}
.kk-alert-message {
    color: var(--kk-gray-600);
    font-size: 0.875rem;
    line-height: 1.5;
}

.kk-alert-footer {
    padding: 0 1.5rem 1.25rem;
    display: flex;
    justify-content: flex-end;
}

/* ==================== Info Tooltips ==================== */
.info-tip {
    color: var(--kk-gray-400);
    cursor: help;
    font-size: 0.85rem;
    margin-left: 4px;
    transition: color 0.2s;
}

.info-tip:hover {
    color: var(--kk-teal);
}

/* ==================== Unsaved Changes Detection ==================== */
[data-settings-card].has-changes {
    box-shadow: 0 0 0 2px var(--kk-teal);
    transition: box-shadow 0.3s ease;
}

.card-unsaved-notice {
    display: none;
    background: var(--kk-warning-bg);
    border-bottom: 1px solid var(--kk-amber);
    padding: 8px 16px;
    font-size: 0.8rem;
    color: var(--kk-warning-text);
    align-items: center;
    gap: 6px;
}

[data-settings-card].has-changes .card-unsaved-notice {
    display: flex;
}

.unsaved-modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1050;
    align-items: center;
    justify-content: center;
}

.unsaved-modal-backdrop.show {
    display: flex;
}

.unsaved-modal {
    background: white;
    border-radius: var(--radius-xl);
    padding: 28px;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.unsaved-modal h4 {
    margin: 0 0 8px;
    font-size: 1.1rem;
    color: var(--kk-dark-teal);
}

.unsaved-modal p {
    margin: 0 0 20px;
    color: var(--kk-gray-600);
    font-size: 0.9rem;
}

.unsaved-modal .modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* ==================== Grade Template Responsive ==================== */
@media (max-width: 767.98px) {
    /* Stack filter bar controls vertically */
    .filter-bar {
        flex-direction: column;
        align-items: stretch !important;
    }
    .filter-bar select {
        max-width: 100% !important;
    }
    .filter-bar .view-tabs {
        justify-content: stretch;
        width: 100%;
    }
    .filter-bar .view-tabs .btn {
        flex: 1;
        font-size: 0.75rem;
        padding: 0.375rem 0.5rem;
    }

    /* Grade legend wraps */
    .grade-legend {
        flex-wrap: wrap;
        gap: 0.5rem;
        font-size: 0.75rem;
    }

    /* Gradebook cells: smaller on tablet */
    .gradebook-table td { padding: 0.2rem 0.35rem; font-size: 0.75rem; }
    .gradebook-table th { font-size: 0.75rem; }

    /* Stats bar stacks */
    .stats-bar { gap: 0.75rem; }
    .stat-pill { font-size: 0.8125rem; padding: 0.375rem 0.75rem; }

    /* Pagination bar stacks */
    .pagination-bar { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 575.98px) {
    /* Tighter score inputs */
    .scores-table .score-input {
        font-size: 0.8125rem;
        padding: 0.25rem 0.125rem;
    }
    .scores-table th,
    .scores-table td {
        padding: 0.25rem 0.35rem;
        font-size: 0.75rem;
    }

    /* Smaller gradebook cells */
    .gradebook-table td { padding: 0.15rem 0.25rem; font-size: 0.75rem; }
    .avg-cell { padding: 1px 4px; font-size: 0.75rem; }

    /* Keyboard shortcuts hint hidden on mobile */
    .alert .flex-wrap kbd { font-size: 0.6875rem; padding: 1px 4px; }

    /* Chart container smaller */
    #chartContainer { min-height: 250px; }
}

/* ==================== Accessibility: Focus Visible ==================== */
*:focus-visible {
    outline: 2px solid var(--kk-teal);
    outline-offset: 2px;
}

.btn:focus-visible {
    box-shadow: 0 0 0 3px rgba(70, 168, 170, 0.4);
}

/* ==================== Auth Section Styles ==================== */
.auth-section {
    padding: 0 2rem;
    margin-bottom: 1.5rem;
}

.auth-section h5 {
    color: var(--kk-gray-800);
    margin-bottom: 0.5rem;
}

.auth-section p {
    color: var(--kk-gray-500);
    font-size: 0.9rem;
    margin: 0;
}

.auth-section .auth-section-detail {
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.auth-form-hint {
    color: var(--kk-gray-500);
    font-size: 0.8rem;
}

.auth-footer-link {
    text-align: center;
    padding: 0 2rem;
    margin-top: 1rem;
}

.auth-footer-link p {
    color: var(--kk-gray-500);
    font-size: 0.85rem;
}

.auth-footer-link a {
    color: var(--kk-teal);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer-link a:hover {
    color: var(--kk-teal-dark);
}

.auth-name-row {
    display: flex;
    gap: 12px;
    padding: 0 2rem;
    margin-bottom: 1rem;
}

.auth-name-col {
    flex: 1;
}

/* ==================== Maintenance Page ==================== */
.maintenance-page {
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient-background);
    padding: 2rem 1rem;
}

.maintenance-container {
    text-align: center;
    max-width: 480px;
    width: 100%;
}

.maintenance-logo {
    width: 150px;
    height: auto;
    margin-bottom: 1.5rem;
}

.maintenance-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.maintenance-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.maintenance-icon i {
    font-size: 1.75rem;
    color: white;
}

.maintenance-card h1 {
    color: var(--kk-gray-800);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.maintenance-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--kk-warning-bg);
    color: var(--kk-warning-text);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.maintenance-message {
    color: var(--kk-gray-500);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.maintenance-features {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.maintenance-feature {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--kk-gray-500);
    font-size: 0.85rem;
}

.maintenance-feature i {
    color: var(--kk-teal);
}

.maintenance-admin {
    padding-top: 1.5rem;
    border-top: 1px solid var(--kk-gray-200);
}

.maintenance-admin p {
    color: var(--kk-gray-400);
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
}

.maintenance-footer {
    margin-top: 1.5rem;
    color: var(--kk-gray-400);
    font-size: 0.8rem;
}

.maintenance-footer a {
    color: var(--kk-gray-400);
    text-decoration: none;
}

.maintenance-footer a:hover {
    color: var(--kk-teal);
}

@media (max-width: 480px) {
    .maintenance-card { padding: 1.5rem; }
    .maintenance-card h1 { font-size: 1.25rem; }
    .maintenance-features { flex-direction: column; gap: 0.5rem; }
}

/* ==================== D15: Attendance Print Styles ==================== */
/* Screen: hide print-only elements */
.d15-print-header,
.d15-print-legend,
.d15-print-col-blank,
.d15-print-col-filled,
.d15-print-col-notes {
    display: none;
}

/* Front Desk slip — hidden on screen */
.fd-slip { display: none; }

/* ===== MOBILE RESPONSIVENESS FIXES (v18.53+) ===== */

/* Header bar responsive height */
@media (max-width: 767.98px) {
    .top-header {
        height: auto;
        min-height: 56px;
        padding: 0.5rem 1rem;
    }
    .top-header .header-title h1 { font-size: 1.125rem; }
    .top-header .header-actions { gap: 0.375rem; }
    .top-header .header-actions .btn { font-size: 0.75rem; padding: 0.375rem 0.625rem; }
}

@media (max-width: 575.98px) {
    .top-header {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .top-header .header-title h1 { font-size: 1rem; }
    .top-header .header-actions .btn span { display: none; }
}

/* Content wrapper tighter on small phones */
@media (max-width: 575.98px) {
    .content-wrapper {
        padding: 12px;
        overflow-x: hidden;
    }
}

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

@media (max-width: 767.98px) {
    .page-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start !important;
    }
    .page-header .header-actions {
        width: 100%;
    }
}

/* Score inputs — enlarge for touch on mobile */
@media (max-width: 767.98px) {
    .scores-table .score-input {
        padding: 0.5rem 0.375rem;
        font-size: 1rem;
        min-height: 44px;
    }
}

/* Pagination buttons — enlarge for touch on mobile */
@media (max-width: 575.98px) {
    .pagination-btns button,
    .pagination-btns .btn {
        padding: 0.5rem 0.75rem;
        min-height: 44px;
        min-width: 44px;
    }
    .pagination-bar .page-link {
        padding: 8px 14px;
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

/* Form inputs — prevent iOS zoom (needs 16px font-size) */
@media (max-width: 767.98px) {
    .form-control,
    .form-select,
    textarea.form-control {
        font-size: 16px;
    }
}

/* Sidebar nav links — 44px touch targets on mobile */
@media (max-width: 991.98px) {
    .sidebar .nav-link {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
}

/* Card footer stack on mobile */
@media (max-width: 575.98px) {
    .card-footer.d-flex {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }
}

/* Table wrapper overflow fix — override overflow:hidden for mobile scroll */
@media (max-width: 767.98px) {
    .table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Schedule grid — allow horizontal scroll on phone */
@media (max-width: 575.98px) {
    .schedule-grid {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Fixed-width selects — full width on mobile */
@media (max-width: 575.98px) {
    select.form-select[style*="width"],
    select[style*="min-width"] {
        width: 100% !important;
        min-width: 100% !important;
    }
}

/* Keyboard shortcut hint bars — hide on touch devices */
@media (max-width: 767.98px) {
    .keyboard-shortcuts-bar { display: none !important; }
}

/* Dashboard stat cards — 2-column on phone */
@media (max-width: 575.98px) {
    .dashboard-grid .card { margin-bottom: 0.5rem; }
}

/* Filter bars — stack vertically on mobile */
@media (max-width: 575.98px) {
    .filter-bar,
    .filter-form {
        flex-direction: column;
        gap: 0.5rem;
    }
    .filter-bar select,
    .filter-bar .search-box {
        width: 100%;
        min-width: 100% !important;
        max-width: 100% !important;
    }
    .filter-select {
        width: 100% !important;
        min-width: 100% !important;
    }
}

/* Action button rows — wrap on mobile */
@media (max-width: 575.98px) {
    .d-flex.justify-content-between {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .action-buttons {
        flex-wrap: wrap;
    }
}

/* Alert banners — tighter on phone */
@media (max-width: 575.98px) {
    .alert .d-flex.justify-content-between {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Modal dialogs — full width on phone */
@media (max-width: 575.98px) {
    .modal-dialog {
        margin: 0.5rem;
    }
}

/* Empty state — compact on phone */
@media (max-width: 575.98px) {
    .empty-state {
        padding: 1.5rem 1rem;
    }
    .empty-state i {
        font-size: 2rem;
    }
}

/* Stats grid — 2-col on phone */
@media (max-width: 575.98px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

/* Touch target minimum on phone — btn-sm and checkboxes */
@media (max-width: 767.98px) {
    .btn-sm {
        min-height: 36px;
    }
    .form-check-input {
        width: 1.25em;
        height: 1.25em;
    }
}

@media print {
    /* Hide non-essential UI */
    .sidebar,
    .sidebar-toggle,
    .menu-toggle,
    .impersonation-banner,
    .flash-messages,
    .d15-no-print {
        display: none !important;
    }

    /* Front Desk receipt slip print mode */
    .fd-print-active .fd-no-print { display: none !important; }
    .fd-print-active .fd-slip {
        display: block !important;
        position: absolute;
        top: 0;
        left: 0;
    }
    .fd-print-active .fd-slip .slip-content {
        width: 80mm;
        font-family: 'Courier New', monospace;
        padding: 8px;
        font-size: 12px;
        line-height: 1.4;
    }
    .fd-print-active .sidebar,
    .fd-print-active .main-content > *:not(.fd-slip) {
        display: none !important;
    }
    .fd-print-active .fd-slip .slip-barcode svg {
        max-width: 70mm;
        height: auto;
    }

    /* Full-width content */
    .main-content {
        margin-left: 0 !important;
        padding: 0 !important;
    }
    .content-wrapper {
        padding: 0 !important;
    }

    /* Show print-only elements */
    .d15-print-header,
    .d15-print-legend {
        display: block !important;
    }

    /* Attendance page: hide interactive elements */
    .attendance-page .selection-bar,
    .attendance-page .stats-bar,
    .attendance-page .quick-actions,
    .attendance-page .form-actions,
    .attendance-page .workflow-hint,
    .attendance-page .future-date-banner,
    .attendance-page .excuse-required-hint,
    .attendance-page .status-legend,
    .attendance-page .d15-print-actions {
        display: none !important;
    }

    /* Hide interactive status columns and history */
    .attendance-page .col-status,
    .attendance-page .col-history {
        display: none !important;
    }
    .attendance-page th.col-status,
    .attendance-page th.col-history {
        display: none !important;
    }

    /* Table styling for print */
    .attendance-table-wrapper {
        box-shadow: none !important;
        border: 1px solid #999;
    }
    .attendance-table th {
        background: #f0f0f0 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
    .attendance-table td,
    .attendance-table th {
        padding: 0.4rem 0.5rem !important;
        font-size: 0.8rem;
    }
    .student-name { font-size: 0.85rem; }
    .student-hebrew { font-size: 0.75rem; }

    /* Print mode: blank sheet */
    .attendance-page.d15-print-blank .d15-print-col-blank,
    .attendance-page.d15-print-blank th.d15-print-col-blank {
        display: table-cell !important;
    }
    .attendance-page.d15-print-blank .d15-print-col-notes,
    .attendance-page.d15-print-blank th.d15-print-col-notes {
        display: table-cell !important;
    }
    .attendance-page.d15-print-blank .d15-print-col-filled,
    .attendance-page.d15-print-blank th.d15-print-col-filled {
        display: none !important;
    }

    /* Print mode: filled sheet */
    .attendance-page.d15-print-filled .d15-print-col-filled,
    .attendance-page.d15-print-filled th.d15-print-col-filled {
        display: table-cell !important;
    }
    .attendance-page.d15-print-filled .d15-print-col-notes,
    .attendance-page.d15-print-filled th.d15-print-col-notes {
        display: table-cell !important;
    }
    .attendance-page.d15-print-filled .d15-print-col-blank,
    .attendance-page.d15-print-filled th.d15-print-col-blank {
        display: none !important;
    }

    /* Checkbox columns sizing */
    .d15-print-col-blank {
        text-align: center;
        white-space: nowrap;
        font-size: 0.75rem !important;
    }
    .d15-print-col-notes {
        min-width: 120px;
    }

    /* Page layout */
    .attendance-page {
        max-width: none !important;
    }
    body { margin: 0; }

    @page {
        margin: 0.5in;
    }
}