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

:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-gradient: linear-gradient(135deg, #000000 0%, #09090b 50%, #121214 100%);
    --card-bg: rgba(20, 20, 20, 0.6);
    
    --card-text-title: #ffffff;
    --card-text-desc: #a1a1aa;
    --card-text-meta: #71717a;
    
    --nav-bg: #121214;
    --nav-border: rgba(255, 255, 255, 0.08);
    --nav-text: #ffffff;
    --nav-text-muted: #a1a1aa;
    
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.8);
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --accent-blue: #10b981;
    --accent-blue-hover: #059669;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --sidebar-w: 260px;
    --navbar-h: 64px;
    
    --t-fast: 0.15s ease;
    --t-base: 0.3s ease;
}

[data-theme="light"] {
    --bg-primary: #08303b;
    --bg-secondary: #0e4a55;
    --bg-gradient: linear-gradient(135deg, #08303b 0%, #0e4a55 50%, #12646f 100%);
    --card-bg: #f3f4f6;
    
    --card-text-title: #111827;
    --card-text-desc: #4b5563;
    --card-text-meta: #6b7280;
    
    --nav-bg: #eceff1;
    --nav-border: rgba(0, 0, 0, 0.04);
    --nav-text: #111827;
    --nav-text-muted: #6b7280;
    
    --glass-bg: rgba(24, 148, 155, 0.1);
    --glass-border: rgba(24, 148, 155, 0.25);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    --text-primary: #ffffff;
    --text-secondary: #bce3e8;
    --text-muted: #82b2b8;
    
    --accent-blue: #10b981;
}

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

html {
    scroll-behavior: smooth;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}
[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
}
[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.25);
}

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

body {
    font-family: 'Outfit', sans-serif;
    font-weight: 400;
    line-height: 1.5;
    background: var(--bg-gradient);
    background-color: var(--bg-primary);
    background-size: 400% 400%;
    animation: gradientBG 20s ease infinite;
    background-attachment: fixed;
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
}

/* Orbs completely removed per strict design requirements */
body::before, body::after {
    display: none !important;
}

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

ul {
    list-style: none;
}

input, select, textarea, button {
    font-family: inherit;
    outline: none;
    border: none;
    background: none;
}

.hidden {
    display: none !important;
}

/* ========== GLOBAL FORM STYLES ========== */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px var(--space-md);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    background-color: rgba(255, 255, 255, 0.04);
    transition: border-color var(--t-fast), background-color var(--t-fast), box-shadow var(--t-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-blue);
    background-color: rgba(99, 102, 241, 0.05);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
    outline: none;
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 90px;
}

.error-banner {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--accent-red);
    font-size: 0.875rem;
    text-align: center;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}


.brand-gradient {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.navbar {
    position: fixed;
    top: 20px;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: 95%;
    max-width: 1200px;
    height: var(--navbar-h);
    z-index: 50;
    background: var(--nav-bg) !important;
    border-radius: 100px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border: 1px solid var(--nav-border) !important;
    color: var(--nav-text) !important;
    transition: all var(--t-base);
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
}

.navbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    letter-spacing: -0.02em;
    color: var(--nav-text) !important;
}

.brand-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-blue);
    box-shadow: 0 0 10px var(--accent-blue);
}

.navbar-links {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--nav-text-muted) !important;
    transition: color 0.3s ease, font-weight 0.3s ease;
}

.nav-link:hover {
    color: var(--nav-text) !important;
}

.nav-link.active {
    color: var(--nav-text) !important;
    font-weight: 700;
    text-shadow: none !important;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Dynamic Nav Icons */
html[lang="en"] #lang-toggle-nav::before {
    content: "AR";
    font-weight: 700;
    font-size: 0.9rem;
}
html[lang="ar"] #lang-toggle-nav::before {
    content: "EN";
    font-weight: 700;
    font-size: 0.9rem;
}

[data-theme="dark"] #theme-toggle-nav::before {
    content: "☀️";
    font-size: 1.1rem;
}
[data-theme="light"] #theme-toggle-nav::before {
    content: "🌙";
    font-size: 1.1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--t-fast);
}

.btn-primary {
    background-color: var(--accent-blue);
    color: #ffffff;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.15);
}

.btn-icon {
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.btn-icon:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.8125rem;
}

#public-site {
    padding-top: var(--navbar-h);
}

.hero-section {
    min-height: calc(100vh - var(--navbar-h));
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-xl);
    align-items: center;
    position: relative;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(var(--glass-border) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
}

.hero-badge {
    display: inline-flex;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    border: 1px solid var(--glass-border);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    background-color: rgba(255, 255, 255, 0.02);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
}

.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-card {
    position: absolute;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    animation: float 6s ease-in-out infinite;
}

.floating-card strong {
    font-size: 0.875rem;
    display: block;
}

.floating-card small {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.fc-1 { top: 15%; left: 10%; animation-delay: 0s; }
.fc-2 { top: 50%; right: 5%; animation-delay: -2s; }
.fc-3 { bottom: 15%; left: 20%; animation-delay: -4s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.features-section, .about-section {
    padding: var(--space-3xl) var(--space-xl);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-blue);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    transition: transform var(--t-base);
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: var(--space-lg) 0 var(--space-sm);
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about-desc {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.stack-pill {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    border: 1px solid var(--glass-border);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 0 var(--space-xs) var(--space-sm) 0;
}

.about-card {
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
}

.about-role-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--glass-border);
    font-size: 0.875rem;
}

.about-role-row:last-child {
    border-bottom: none;
}

.site-footer {
    border-top: 1px solid var(--glass-border);
    padding: var(--space-xl);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ========== LOGIN PAGE — PREMIUM GLASSMORPHISM ========== */

.login-page {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    background-color: #06060f;
    z-index: 100;
    overflow: hidden;
}

/* Animated Mesh Gradient Orbs */
.login-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.login-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.45;
    animation: orbFloat 12s ease-in-out infinite alternate;
}

.orb-1 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, #4f46e5, transparent 70%);
    top: -120px; left: -100px;
    animation-duration: 10s;
}

.orb-2 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, #7c3aed, transparent 70%);
    bottom: -80px; right: -80px;
    animation-duration: 14s;
    animation-delay: -4s;
}

.orb-3 {
    width: 300px; height: 300px;
    background: radial-gradient(circle, #2563eb, transparent 70%);
    top: 50%; left: 55%;
    animation-duration: 18s;
    animation-delay: -8s;
}

@keyframes orbFloat {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(30px, -20px) scale(1.05); }
    100% { transform: translate(-20px, 30px) scale(0.95); }
}

/* The Glass Card */
.login-card {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 420px;
    padding: 44px 40px 36px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 24px 64px rgba(0, 0, 0, 0.55),
        0 0 0 1px rgba(255, 255, 255, 0.04) inset,
        0 1px 0 rgba(255, 255, 255, 0.1) inset;
    animation: cardIn 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes cardIn {
    from { opacity: 0; transform: translateY(24px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* Back Button */
.login-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    padding: 4px 0;
    margin-bottom: var(--space-lg);
    transition: color var(--t-fast);
}

.login-back-btn:hover { color: var(--text-primary); }

/* Brand area */
.login-logo {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-brand-icon {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-sm);
}

.brand-dot-lg {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    display: block;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.login-logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 4px;
}

.login-logo p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    font-weight: 500;
}

/* Input with Icon */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 13px;
    color: var(--text-muted);
    pointer-events: none;
    transition: color var(--t-fast);
    flex-shrink: 0;
}

.input-wrapper input {
    padding-left: 40px;
}

.input-wrapper:focus-within .input-icon {
    color: var(--accent-blue);
}

/* Premium Login Button */
.btn-login-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 13px var(--space-lg);
    border-radius: var(--radius-sm);
    border: none;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    letter-spacing: 0.01em;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: #fff;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s;
    margin-top: var(--space-xs);
}

.btn-login-primary:hover {
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.55);
}

.btn-login-primary:active {
    transform: scale(0.99);
}

.btn-login-primary:disabled {
    opacity: 0.6;
    transform: none;
    cursor: not-allowed;
}

/* Divider */
.login-divider {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0 var(--space-md);
    color: var(--text-muted);
    font-size: 0.75rem;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

/* Student Registration Link */
.btn-register-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 100%;
    padding: 11px var(--space-lg);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(99, 102, 241, 0.3);
    background: rgba(99, 102, 241, 0.06);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 400;
    text-decoration: none;
    text-align: center;
    transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
    cursor: pointer;
}

.btn-register-link:hover {
    background: rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.5);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.btn-register-link strong {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Hint text */
.login-hint {
    margin-top: var(--space-xl);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.login-hint code {
    background: rgba(255,255,255,0.06);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    border: 1px solid var(--glass-border);
}



.dashboard {
    display: flex;
    min-height: 100vh;
    height: auto;
    padding-top: var(--navbar-h);
}

.sidebar {
    width: var(--sidebar-w);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: var(--navbar-h);
    height: calc(100vh - var(--navbar-h));
    overflow-y: auto;
}

.sidebar-brand {
    height: var(--navbar-h);
    display: flex;
    align-items: center;
    padding: 0 var(--space-xl);
    font-weight: 600;
    border-bottom: 1px solid var(--glass-border);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all var(--t-fast);
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.02);
}

.nav-item.active {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

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

.main-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: visible;
}

/* Compact footer strip inside dashboard panels */
.dashboard-footer {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1.5rem;
    border-top: 1px solid var(--glass-border);
    background: var(--bg-secondary);
    font-size: 0.75rem;
    color: var(--text-muted);
    gap: 1rem;
    flex-wrap: wrap;
}

.dashboard-footer a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 1rem;
    transition: color var(--t-fast);
}

.dashboard-footer a:hover {
    color: var(--text-primary);
}

.top-bar {
    height: var(--navbar-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: var(--navbar-h);
    z-index: 10;
    background: var(--nav-bg);
}

.top-bar h2 {
    font-size: 1rem;
    font-weight: 500;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.role-badge {
    padding: 2px var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.625rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.badge-admin { background: rgba(139, 92, 246, 0.1); color: var(--accent-purple); border: 1px solid rgba(139, 92, 246, 0.2); }
.badge-teacher { background: rgba(16, 185, 129, 0.1); color: var(--accent-green); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-student { background: rgba(245, 158, 11, 0.1); color: var(--accent-orange); border: 1px solid rgba(245, 158, 11, 0.2); }

.tab-content {
    flex: 1;
    overflow-y: visible;
    padding: var(--space-xl);
}

.card {
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.stat-num {
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

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

th {
    text-align: left;
    padding: var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.01);
}

td {
    padding: var(--space-md);
    font-size: 0.875rem;
    border-bottom: 1px solid var(--glass-border);
    transition: background-color var(--t-fast);
}

tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

.item-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.item-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-sm);
    background-color: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--glass-border);
    transition: transform var(--t-fast), background-color var(--t-fast), box-shadow var(--t-fast);
}

.item-row:hover {
    transform: translateY(-2px);
    background-color: rgba(255, 255, 255, 0.03);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.item-row-info {
    font-weight: 500;
    font-size: 0.875rem;
}

.item-row-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--space-xs);
}

.groups-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-md);
}

/* =========================================
   SUBJECT ICON CARDS
   ========================================= */
.subject-icon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.subject-icon-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 1.4rem 1rem;
    border-radius: var(--radius-lg);
    border: 2px solid transparent;
    background: rgba(255,255,255,0.03);
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
    user-select: none;
}

.subject-icon-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--card-accent, rgba(139,92,246,0.08));
    opacity: 0.6;
    transition: opacity 0.25s ease;
}

.subject-icon-card:hover {
    transform: translateY(-4px);
    border-color: var(--card-accent-border, rgba(139,92,246,0.4));
    box-shadow: 0 8px 28px var(--card-accent-shadow, rgba(139,92,246,0.2));
}

.subject-icon-card:hover::before {
    opacity: 1;
}

.subject-icon-card.active {
    border-color: var(--card-accent-border, rgba(139,92,246,0.6));
    box-shadow: 0 0 0 3px var(--card-accent-shadow, rgba(139,92,246,0.25)),
                0 8px 28px var(--card-accent-shadow, rgba(139,92,246,0.2));
    transform: translateY(-2px);
}

.subject-icon-card.active::before {
    opacity: 1;
}

.subject-card-emoji {
    font-size: 2.4rem;
    line-height: 1;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 2px 6px rgba(0,0,0,0.25));
}

.subject-card-label {
    font-size: 0.82rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.subject-card-count {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
    background: rgba(255,255,255,0.06);
    padding: 2px 8px;
    border-radius: 20px;
}

/* =========================================
   SUBJECT GROUPS PANEL (accordion)
   ========================================= */
.subject-groups-panel {
    display: none;
    flex-direction: column;
    gap: var(--space-md);
    animation: panelSlideIn 0.3s ease;
}

.subject-groups-panel.open {
    display: flex;
}

@keyframes panelSlideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.subject-panel-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    background: var(--panel-header-bg, rgba(139,92,246,0.08));
    border-left: 4px solid var(--card-accent-border, rgba(139,92,246,0.6));
    margin-bottom: 4px;
}

.subject-panel-header .panel-emoji {
    font-size: 1.6rem;
}

.subject-panel-header .panel-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.subject-panel-header .panel-subtitle {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* =========================================
   GROUP MINI-DASHBOARD
   ========================================= */
.group-mini-dash {
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    background: var(--bg-secondary);
    overflow: hidden;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.group-mini-dash:hover {
    box-shadow: 0 6px 24px rgba(0,0,0,0.18);
    border-color: rgba(139,92,246,0.3);
}

.group-mini-dash-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.1rem;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--glass-border);
}

.group-mini-dash-name {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
}

.group-mini-dash-body {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0;
}

.mini-dash-stat {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 0.75rem 1rem;
    border-right: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.mini-dash-stat:last-child {
    border-right: none;
}

.mini-dash-stat-icon {
    font-size: 1.1rem;
    line-height: 1;
}

.mini-dash-stat-label {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mini-dash-stat-value {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-primary);
    word-break: break-word;
}

[data-theme="light"] .subject-icon-card {
    background: rgba(0,0,0,0.02);
}

[data-theme="light"] .group-mini-dash {
    background: var(--bg-secondary);
}

[data-theme="light"] .group-mini-dash-header {
    background: rgba(0,0,0,0.02);
}


.group-card {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    transition: transform var(--t-fast), box-shadow var(--t-fast), border-color var(--t-fast);
    cursor: pointer;
}

.group-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    border-color: rgba(139, 92, 246, 0.35);
}

/* Grade selection cards in "My Classes" drill-down */
.grade-card {
    text-align: center;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.06), rgba(59, 130, 246, 0.06));
    border-color: rgba(139, 92, 246, 0.15);
}

.grade-card:hover {
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.15);
}

/* Student course-ad cards in Explore Courses */
.course-ad-card {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(16, 185, 129, 0.05));
    border-color: rgba(59, 130, 246, 0.15);
}

.course-ad-card:hover {
    border-color: rgba(59, 130, 246, 0.45);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.15);
}

.group-card-subject {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.group-card-grade {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.group-card-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    width: 100%;
    max-width: 500px;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.form-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--glass-border);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: var(--space-xl) auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

.qr-display-card {
    text-align: center;
    max-width: 400px;
    margin: var(--space-xl) auto;
}

.qr-code-container {
    width: 200px;
    height: 200px;
    margin: var(--space-lg) auto;
    background-color: white;
    border-radius: var(--radius-md);
    display: grid;
    place-items: center;
}

.qr-token-box {
    margin: var(--space-md) 0;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    background-color: rgba(255, 255, 255, 0.05);
}

.qr-token-box code {
    font-family: monospace;
    color: var(--accent-blue);
}

.announcement-feed {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.ann-item {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-left: 2px solid var(--accent-blue);
}

.ann-item-title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.ann-item-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.ann-item-meta {
    font-size: 0.75rem;
    display: flex;
    gap: var(--space-md);
    color: var(--text-muted);
}

/* =======================================
   RTL (Arabic) Layout Support
   ======================================= */
[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .sidebar {
    border-right: 1px solid var(--glass-border);
    border-left: none;
}

[dir="rtl"] .top-bar-right,
[dir="rtl"] .navbar-actions {
    margin-right: auto;
    margin-left: 0;
}

[dir="rtl"] .navbar-links {
    margin-right: var(--space-xl);
    margin-left: auto;
}

[dir="rtl"] .back-to-home {
    left: auto;
    right: var(--space-md);
}

[dir="rtl"] th, [dir="rtl"] td {
    text-align: right;
}

[dir="rtl"] .ann-item {
    border-right: 2px solid var(--accent-blue);
    border-left: 1px solid var(--glass-border);
}

.hidden {
    display: none !important;
}

/* ========== PROFILE WIDGET & SETTINGS ========== */
.sidebar-profile-widget {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    margin: var(--space-md) var(--space-md) 0 var(--space-md);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.2s;
}

.sidebar-profile-widget:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.profile-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-blue);
}

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

.profile-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.profile-role {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.profile-settings-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.avatar-upload-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.profile-avatar-large {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-blue);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.profile-forms-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.profile-info-form, .profile-password-form {
    background: rgba(255, 255, 255, 0.02);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.profile-info-form h4, .profile-password-form h4 {
    margin-top: 0;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: var(--space-sm);
}

.msg-box {
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    text-align: center;
}
.msg-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}
.msg-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }

/* Checklist Container (replaces multiple selects) */
.checklist-container {
    max-height: 150px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) 0;
}

.checklist-container::-webkit-scrollbar {
    width: 6px;
}
.checklist-container::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background-color var(--t-fast);
}

.checkbox-item:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.checkbox-item input[type="checkbox"],
.checkbox-item input[type="radio"] {
    appearance: none;
    background-color: rgba(255, 255, 255, 0.1);
    margin-right: 10px;
    width: 16px;
    height: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: grid;
    place-content: center;
    cursor: pointer;
    transition: all var(--t-fast);
}

.checkbox-item input[type="checkbox"] {
    border-radius: 4px;
}

.checkbox-item input[type="radio"] {
    border-radius: 50%;
}

.checkbox-item input[type="checkbox"]::before {
    content: "";
    width: 10px;
    height: 10px;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    box-shadow: inset 1em 1em var(--accent-blue);
    background-color: var(--accent-blue);
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}

.checkbox-item input[type="radio"]::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    background-color: var(--accent-blue);
}

.checkbox-item input[type="checkbox"]:checked,
.checkbox-item input[type="radio"]:checked {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: var(--accent-blue);
}

.checkbox-item input[type="checkbox"]:checked::before,
.checkbox-item input[type="radio"]:checked::before {
    transform: scale(1);
}

@media (max-width: 768px) {
    .profile-forms-grid {
        grid-template-columns: 1fr;
    }
}

/* =========================================
   FEATURED COURSES & ANNOUNCEMENTS SECTION
   ========================================= */
.announcements-section {
    padding: var(--space-3xl) 0;
    position: relative;
    z-index: 1;
}

.ad-marquee-container {
    width: 100%;
    overflow: hidden;
    padding: 2rem 0;
    position: relative;
    background: transparent;
}

.ad-marquee-track {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    align-items: stretch !important;
    gap: 2rem !important;
    width: max-content !important;
    animation: marqueeScroll 30s linear infinite !important;
}

.ad-marquee-track:hover {
    animation-play-state: paused;
}

@keyframes marqueeScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ad-card {
    flex: 0 0 350px !important;
    width: 350px !important;
    display: flex !important;
    flex-direction: column !important;
    white-space: normal;
    background: rgba(0, 0, 0, 0.25) !important;
    backdrop-filter: blur(10px);
    border-radius: 16px !important;
    padding: 12px !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1.5px solid rgba(255, 255, 255, 0.15) !important;
    transition: all 0.3s ease;
}

[data-theme="light"] .ad-card {
    background: rgba(255, 255, 255, 0.9) !important;
    border: 1.5px solid rgba(0, 0, 0, 0.08) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.ad-image {
    width: 100% !important;
    height: 180px !important;
    object-fit: contain !important;
    display: block !important;
    border-radius: 10px !important;
}

.ad-body {
    padding: 12px 4px 8px 4px !important;
}

.ad-footer {
    padding: 8px 4px 4px 4px !important;
    margin-top: auto;
}

.ad-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow);
}

.ad-badge {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
    padding: 4px 10px;
    border-radius: var(--radius-full);
}

.ad-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--card-text-title);
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

.ad-card p {
    color: var(--card-text-desc);
    font-size: 0.9rem;
    line-height: 1.4;
    margin-bottom: 0.75rem;
}

/* Card metadata & author (screenshot design) */
.ad-meta-info {
    font-size: 0.85rem;
    color: var(--card-text-meta);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.ad-author {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 0.75rem;
}

.ad-author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.ad-author-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--card-text-meta);
}

/* =========================================
   PROFESSIONAL SAAS FOOTER
   ========================================= */
.saas-footer {
    border-top: 1px solid var(--glass-border);
    padding: 0;
    background-color: var(--bg-secondary);
    margin-top: var(--space-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.footer-col h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.brand-col p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 300px;
    line-height: 1.6;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.links-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.links-col a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--t-fast);
}

.links-col a:hover {
    color: var(--accent-blue);
}

.subscribe-form {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.subscribe-form input {
    flex-grow: 1;
    background: var(--bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.subscribe-form .btn {
    padding: 10px 16px;
}

.social-icons {
    display: flex;
    gap: var(--space-sm);
}

.social-icons span {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--t-fast);
}

.social-icons span:hover {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.legal-links {
    display: flex;
    gap: var(--space-md);
}

.legal-links a:hover {
    color: var(--text-primary);
}

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

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}
.switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
  margin: 0;
}
.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);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: .3s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 2px;
  background-color: var(--text-primary);
  transition: .3s;
}
input:checked + .slider {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
}
input:checked + .slider:before {
  transform: translateX(22px);
  background-color: #fff;
}
.slider.round {
  border-radius: 24px;
}
.slider.round:before {
  border-radius: 50%;
}

/* ========== SESSION LIVE STATUS STYLES ========== */
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 6px #10b981; }
    50%       { opacity: 0.6; transform: scale(1.3); box-shadow: 0 0 14px #10b981; }
}

/* Pulsing dot shown in the "waiting for instructor" indicator */
.session-pulse-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.25);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
    animation: waiting-pulse 2s ease-in-out infinite;
}

@keyframes waiting-pulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50%       { opacity: 0.9; transform: scale(1.15); }
}

/* Scan button wrapper — slides in + fades when session goes live */
.scan-btn-appear {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.scan-btn-appear.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Active session: accent the section icon with a green live-pulse glow */
.group-attendance.active .section-icon {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.25);
    animation: icon-live-pulse 2.5s ease-in-out infinite;
}

@keyframes icon-live-pulse {
    0%, 100% { box-shadow: 0 0 8px rgba(16, 185, 129, 0.2); }
    50%       { box-shadow: 0 0 20px rgba(16, 185, 129, 0.45); }
}

/* Inactive attendance section: lock icon muted */
.group-attendance.inactive .section-icon {
    opacity: 0.5;
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.07);
    box-shadow: none;
    animation: none;
}


/* Student name rows — ensure text is always visible (white) */
.item-row .item-row-info,
#workspace-manual-list .item-row-info {
    color: #ffffff !important;
    font-weight: 500;
}

#workspace-manual-list .item-row {
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
#workspace-manual-list .item-row:last-child {
    border-bottom: none;
}

/* --- Group Addons (Attendance & Posts) --- */
.group-expanded-section {
    padding: var(--space-xl);
    border-top: 1px solid var(--glass-border);
    animation: fadeIn var(--t-fast) ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.group-mini-section {
    background: rgba(255, 255, 255, 0.03); /* Glass look */
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: var(--t-fast);
}

.group-mini-section:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

.section-icon {
    font-size: 2rem;
    padding: 12px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
}

.section-content {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.group-attendance.active {
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
    background: linear-gradient(145deg, rgba(16, 185, 129, 0.05) 0%, rgba(255, 255, 255, 0.03) 100%);
}

.group-attendance.inactive, .group-posts.inactive {
    background: transparent;
    border: 1px dashed var(--glass-border);
}

.posts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-height: 250px;
    overflow-y: auto;
    padding-right: 8px;
    scroll-behavior: smooth;
}

.posts-list::-webkit-scrollbar {
    width: 4px;
}
.posts-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

.group-post-item {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    border-left: 3px solid var(--primary-color);
}

.group-post-item .post-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.group-post-item .post-content {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    white-space: pre-wrap;
}

.group-post-item .post-date {
    font-size: 0.75rem;
    color: var(--accent-blue);
    margin-top: 8px;
    text-align: right;
}

/* Custom Override for Card Color Requested by User */
.course-ad-card, .ad-card,
[data-theme="light"] .course-ad-card, [data-theme="light"] .ad-card,
[data-theme="dark"] .course-ad-card, [data-theme="dark"] .ad-card {
    background: #13444e !important;
    background-color: #13444e !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
}

.course-ad-card .group-card-subject,
.course-ad-card .group-card-grade,
.course-ad-card p,
.ad-card h3,
.ad-card p,
.ad-card .ad-meta-info,
.ad-card .ad-author-name {
    color: #ffffff !important;
}

.course-ad-card .group-card-meta span {
    color: #e2e8f0 !important;
}

/* ===================================================
   SITE FOOTER
   =================================================== */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 3rem 0 0;
    margin-top: 0;
    /* Hidden when inside a dashboard — only shown on the public site */
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem 2.5rem;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.8fr;
    gap: 2.5rem;
}

/* Brand column */
.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.15rem;
    font-weight: 700;
}

.footer-tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    max-width: 260px;
}

/* Column headings */
.footer-heading {
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

/* Link lists */
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--t-fast);
}

.footer-links a:hover {
    color: var(--accent-blue);
}

/* Newsletter form */
.footer-email-form {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.footer-email-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 0.65rem 0.9rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
}

.footer-email-input::placeholder {
    color: var(--text-muted);
}

.footer-email-btn {
    background: var(--accent-blue);
    border: none;
    color: #ffffff;
    padding: 0.65rem 0.9rem;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    transition: background var(--t-fast);
    line-height: 1;
}

.footer-email-btn:hover {
    background: var(--accent-blue-hover);
}

/* Social icons */
.footer-socials {
    display: flex;
    gap: 0.6rem;
}

.footer-social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    text-decoration: none;
    transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}

.footer-social-btn:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #ffffff;
}

/* Bottom bar */
.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    border-top: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

.footer-legal a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color var(--t-fast);
}

.footer-legal a:hover {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 900px) {
    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 560px) {
    .footer-inner {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* =====================================================
   TOP-BAR LAYOUT FIX (left + right)
   ===================================================== */
.top-bar-left {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* =====================================================
   HAMBURGER BUTTON (hidden on desktop)
   ===================================================== */
.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    padding: 8px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    background: transparent;
    transition: background var(--t-fast);
    flex-shrink: 0;
}

.hamburger-btn:hover {
    background: rgba(255, 255, 255, 0.06);
}

.hamburger-line {
    display: block;
    width: 16px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
}

body.mobile-nav-open .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
body.mobile-nav-open .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
body.mobile-nav-open .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* =====================================================
   SIDEBAR TOGGLE BUTTON (hidden on desktop)
   ===================================================== */
.sidebar-toggle-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 6px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    background: transparent;
    cursor: pointer;
    color: var(--text-primary);
    transition: background var(--t-fast);
    flex-shrink: 0;
}

.sidebar-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.06);
}

/* Student top-bar: invisible on desktop (no title/badge), visible on mobile */
.student-top-bar {
    visibility: hidden;
}

/* =====================================================
   SIDEBAR OVERLAY BACKDROP
   ===================================================== */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    z-index: 150;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    animation: fadeInOverlay 0.2s ease;
}

@keyframes fadeInOverlay {
    from { opacity: 0; }
    to   { opacity: 1; }
}

body.sidebar-open .sidebar-overlay {
    display: block;
}

/* =====================================================
   TABLET BREAKPOINT — ≤ 1024px
   ===================================================== */
@media (max-width: 1024px) {
    /* ---- Hero: single column ---- */
    .hero-section {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        padding: calc(var(--navbar-h) + 60px) var(--space-lg) var(--space-2xl);
        text-align: center;
        min-height: auto;
    }

    .hero-visual {
        display: none;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-subtitle {
        max-width: 100%;
    }

    /* ---- About: single column ---- */
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    /* ---- Dashboard sidebar becomes a drawer ---- */
    .sidebar-toggle-btn {
        display: flex;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: -280px;
        width: 280px;
        height: 100vh;
        z-index: 200;
        transition: left 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 4px 0 40px rgba(0, 0, 0, 0.6);
        padding-top: var(--navbar-h);
        overflow-y: auto;
    }

    [dir="rtl"] .sidebar {
        left: auto;
        right: -280px;
        transition: right 0.32s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -4px 0 40px rgba(0, 0, 0, 0.6);
    }

    body.sidebar-open .sidebar {
        left: 0;
    }

    [dir="rtl"] body.sidebar-open .sidebar {
        left: auto;
        right: 0;
    }

    /* ---- Dashboard layout: fill full width ---- */
    .dashboard {
        padding-top: var(--navbar-h);
    }

    .main-panel {
        width: 100%;
    }

    /* ---- Student top-bar: show on tablet/mobile ---- */
    .student-top-bar {
        visibility: visible;
    }
}

/* =====================================================
   MOBILE-L BREAKPOINT — ≤ 768px
   ===================================================== */
@media (max-width: 768px) {
    :root {
        --navbar-h: 56px;
    }

    /* ---- Navbar: pill shrinks, hamburger appears ---- */
    .navbar {
        top: 10px;
        width: calc(100% - 24px);
        border-radius: 14px;
    }

    .navbar-inner {
        padding: 0 var(--space-md);
    }

    /* Hide links, show as dropdown when open */
    .navbar-links {
        display: none;
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        background: var(--nav-bg);
        border: 1px solid var(--glass-border);
        border-radius: var(--radius-md);
        padding: var(--space-sm);
        flex-direction: column;
        gap: 2px;
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
        z-index: 100;
        animation: navSlideDown 0.2s ease;
    }

    @keyframes navSlideDown {
        from { opacity: 0; transform: translateY(-8px); }
        to   { opacity: 1; transform: translateY(0); }
    }

    body.mobile-nav-open .navbar-links {
        display: flex;
    }

    .navbar-links .nav-link {
        padding: 10px var(--space-md);
        border-radius: var(--radius-sm);
        font-size: 0.9rem;
        display: block;
    }

    .navbar-links .nav-link:hover,
    .navbar-links .nav-link.active {
        background: rgba(255, 255, 255, 0.05);
    }

    .hamburger-btn {
        display: flex;
    }

    .navbar-actions .btn {
        padding: 6px var(--space-sm);
        font-size: 0.8rem;
    }

    /* ---- Hero ---- */
    .hero-section {
        padding: calc(var(--navbar-h) + 40px) var(--space-md) var(--space-xl);
    }

    .hero-title {
        font-size: 2.1rem;
        letter-spacing: -0.02em;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-sm);
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
        padding: var(--space-sm) var(--space-lg);
    }

    /* ---- Sections ---- */
    .features-section,
    .about-section {
        padding: var(--space-xl) var(--space-md);
    }

    .section-title {
        font-size: 1.75rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    /* ---- Dashboard content ---- */
    .tab-content {
        padding: var(--space-md);
    }

    .card {
        padding: var(--space-md);
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-sm);
    }

    .groups-grid {
        grid-template-columns: 1fr;
    }

    /* ---- Form grids collapse ---- */
    .form-grid-2 {
        grid-template-columns: 1fr !important;
    }

    /* ---- Tables: horizontal scroll ---- */
    .card,
    .tab-content > div,
    #admin-recent-users,
    #admin-users-list {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table {
        min-width: 560px;
    }

    /* ---- Modals: full-width sheet ---- */
    .modal {
        padding: var(--space-sm);
        align-items: flex-end;
    }

    .modal-content {
        width: 100% !important;
        max-width: 100% !important;
        max-height: 88vh;
        overflow-y: auto;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        margin: 0;
    }

    /* ---- Top-bar ---- */
    .top-bar {
        padding: 0 var(--space-md);
        gap: var(--space-sm);
    }

    .top-bar h2 {
        font-size: 0.9rem;
    }

    /* ---- Sidebar on mobile ---- */
    .sidebar {
        width: min(280px, 80vw);
    }

    .sidebar-profile-widget {
        padding: var(--space-sm) var(--space-md);
    }

    /* ---- Item rows ---- */
    .item-row {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    /* ---- Login card ---- */
    .login-card {
        padding: 32px 24px 28px;
        max-width: 100%;
        width: calc(100vw - 32px);
        border-radius: var(--radius-md);
    }

    /* ---- Workspace session ---- */
    .cards-container {
        flex-direction: column !important;
    }

    /* ---- Profile settings ---- */
    .profile-settings-container {
        flex-direction: column !important;
    }
}

/* =====================================================
   MOBILE-S BREAKPOINT — ≤ 480px
   ===================================================== */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.85rem;
    }

    .hero-badge {
        font-size: 0.7rem;
        padding: 4px var(--space-sm);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .top-bar h2 {
        font-size: 0.8rem;
    }

    .login-card {
        padding: 24px 16px 20px;
        width: calc(100vw - 24px);
    }

    .btn {
        font-size: 0.8125rem;
    }

    .subject-icon-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .sidebar {
        width: 100vw;
        border-radius: 0;
        left: -100vw;
    }

    [dir="rtl"] .sidebar {
        right: -100vw;
    }

    .navbar {
        top: 8px;
        border-radius: 12px;
    }

    td,
    th {
        padding: var(--space-sm);
        font-size: 0.8rem;
    }

    .card-title {
        font-size: 0.9rem;
    }

    .floating-card {
        display: none;
    }

    .btn-login-primary {
        font-size: 0.875rem;
        padding: 12px;
    }

    .feature-card {
        padding: var(--space-md);
    }
}

/* =====================================================
   RTL (Arabic) RESPONSIVE OVERRIDES
   ===================================================== */
@media (max-width: 768px) {
    [dir="rtl"] .input-icon {
        left: auto;
        right: 13px;
    }

    [dir="rtl"] .input-wrapper input {
        padding-left: var(--space-md);
        padding-right: 40px;
    }

    [dir="rtl"] .dashboard-footer a {
        margin-left: 0;
        margin-right: 1rem;
    }
}


/* ═══════════════════════════════════════════════════════════════════════════
   QUIZ SYSTEM STYLES
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Quiz Cards in teacher dashboard list ─────────────────────────────────── */
.quiz-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 14px;
    padding: 18px 20px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    transition: border-color 0.2s, background 0.2s;
}
.quiz-card:hover { border-color: rgba(16,185,129,0.4); background: rgba(16,185,129,0.04); }

.quiz-card-info h5 { margin: 0 0 4px; font-size: 1rem; font-weight: 600; color: #fff; }
.quiz-card-info .quiz-meta { font-size: 0.82rem; color: var(--text-secondary); display: flex; gap: 14px; }

.quiz-badge {
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em;
    text-transform: uppercase; padding: 3px 10px; border-radius: 20px;
}
.quiz-badge.published { background: rgba(16,185,129,0.2); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
.quiz-badge.draft     { background: rgba(245,158,11,0.15); color: #f59e0b; border: 1px solid rgba(245,158,11,0.3); }

.quiz-card-actions { display: flex; gap: 8px; flex-shrink: 0; }
.quiz-card-actions .btn { padding: 7px 14px; font-size: 0.82rem; }

/* ── Student quiz cards ────────────────────────────────────────────────────── */
.student-quiz-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    transition: border-color 0.2s;
}
.student-quiz-card:hover { border-color: rgba(16,185,129,0.35); }
.student-quiz-card.completed { border-color: rgba(16,185,129,0.2); background: rgba(16,185,129,0.03); }

/* ── Full-screen Quiz Builder Modal ───────────────────────────────────────── */
.quiz-modal-overlay {
    position: fixed; inset: 0; z-index: 1100;
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
    opacity: 0; pointer-events: none;
    transition: opacity 0.25s;
}
.quiz-modal-overlay.active { opacity: 1; pointer-events: all; }

.quiz-modal {
    background: var(--card-bg, #141414);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 20px;
    width: 100%; max-width: 900px;
    max-height: 90vh;
    overflow: hidden;
    display: flex; flex-direction: column;
    transform: scale(0.97) translateY(10px);
    transition: transform 0.25s;
}
.quiz-modal-overlay.active .quiz-modal { transform: scale(1) translateY(0); }

.quiz-modal-header {
    padding: 22px 28px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display: flex; align-items: center; justify-content: space-between;
}
.quiz-modal-header h3 { margin: 0; font-size: 1.2rem; color: #fff; }
.quiz-modal-close {
    background: none; border: none; color: var(--text-secondary);
    font-size: 1.4rem; cursor: pointer; padding: 4px; border-radius: 6px;
    transition: color 0.2s, background 0.2s;
}
.quiz-modal-close:hover { color: #fff; background: rgba(255,255,255,0.1); }

.quiz-modal-body { flex: 1; overflow-y: auto; padding: 28px; }
.quiz-modal-footer {
    padding: 18px 28px;
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex; gap: 12px; justify-content: flex-end;
    align-items: center;
}

/* Step indicator */
.quiz-steps {
    display: flex; gap: 0; margin-bottom: 28px;
}
.quiz-step {
    flex: 1; text-align: center; position: relative; padding-bottom: 14px;
    font-size: 0.82rem; color: var(--text-secondary);
    border-bottom: 2px solid rgba(255,255,255,0.1);
    transition: color 0.2s, border-color 0.2s;
}
.quiz-step.active { color: var(--primary, #10b981); border-bottom-color: var(--primary, #10b981); font-weight: 600; }
.quiz-step.done   { color: var(--primary, #10b981); border-bottom-color: var(--primary, #10b981); opacity: 0.7; }
.quiz-step-num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 24px; height: 24px; border-radius: 50%;
    background: rgba(255,255,255,0.08); font-size: 0.75rem; font-weight: 700;
    margin-bottom: 6px;
}
.quiz-step.active .quiz-step-num { background: var(--primary, #10b981); color: #000; }
.quiz-step.done  .quiz-step-num  { background: var(--primary, #10b981); color: #000; }

/* Mode selection cards */
.quiz-mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 8px; }
.quiz-mode-card {
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 14px; padding: 28px 22px;
    text-align: center; cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
    background: rgba(255,255,255,0.02);
}
.quiz-mode-card:hover { border-color: rgba(16,185,129,0.5); transform: translateY(-2px); background: rgba(16,185,129,0.06); }
.quiz-mode-card.selected { border-color: var(--primary, #10b981); background: rgba(16,185,129,0.08); }
.quiz-mode-icon { font-size: 2.8rem; margin-bottom: 14px; }
.quiz-mode-card h4 { margin: 0 0 8px; font-size: 1rem; color: #fff; }
.quiz-mode-card p  { margin: 0; font-size: 0.83rem; color: var(--text-secondary); line-height: 1.5; }

/* Processing spinner state */
.quiz-processing {
    text-align: center; padding: 50px 20px;
}
.quiz-processing .spinner-ring {
    width: 56px; height: 56px; border-radius: 50%;
    border: 4px solid rgba(16,185,129,0.2);
    border-top-color: var(--primary, #10b981);
    animation: spin 0.8s linear infinite;
    margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.quiz-processing h4 { color: #fff; margin: 0 0 8px; }
.quiz-processing p  { color: var(--text-secondary); margin: 0; font-size: 0.9rem; }

/* Question review editor */
.question-review-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 16px;
    transition: border-color 0.2s;
}
.question-review-card:hover { border-color: rgba(255,255,255,0.2); }

.question-review-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 12px;
}
.question-num-badge {
    background: rgba(16,185,129,0.15); color: #10b981;
    font-size: 0.78rem; font-weight: 700; padding: 3px 10px;
    border-radius: 20px; border: 1px solid rgba(16,185,129,0.3);
}

.question-text-input {
    width: 100%; background: rgba(0,0,0,0.3); border: 1px solid rgba(255,255,255,0.12);
    border-radius: 8px; color: #fff; padding: 10px 14px; font-size: 0.92rem;
    resize: vertical; min-height: 60px; margin-bottom: 14px;
    font-family: inherit; line-height: 1.5;
    transition: border-color 0.2s;
}
.question-text-input:focus { outline: none; border-color: rgba(16,185,129,0.5); }

.choices-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.choice-row {
    display: flex; align-items: center; gap: 8px;
}
.choice-label {
    width: 28px; height: 28px; border-radius: 50%;
    background: rgba(255,255,255,0.08); color: var(--text-secondary);
    font-size: 0.8rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.choice-input {
    flex: 1; background: rgba(0,0,0,0.25); border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px; color: #fff; padding: 8px 12px; font-size: 0.88rem;
    font-family: inherit;
    transition: border-color 0.2s;
}
.choice-input:focus { outline: none; border-color: rgba(16,185,129,0.4); }

.correct-answer-row {
    display: flex; align-items: center; gap: 12px; margin-bottom: 10px;
}
.correct-answer-row label { font-size: 0.82rem; color: var(--text-secondary); flex-shrink: 0; }
.correct-answer-select {
    background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.35);
    border-radius: 8px; color: #10b981; padding: 6px 12px; font-size: 0.88rem;
    font-weight: 600; cursor: pointer;
}

.explanation-input {
    width: 100%; background: rgba(0,0,0,0.2); border: 1px solid rgba(255,255,255,0.08);
    border-radius: 8px; color: var(--text-secondary); padding: 8px 12px; font-size: 0.85rem;
    resize: vertical; min-height: 44px; font-family: inherit;
}
.explanation-input:focus { outline: none; border-color: rgba(16,185,129,0.3); color: #fff; }

.delete-question-btn {
    background: none; border: none; color: rgba(239,68,68,0.5);
    cursor: pointer; font-size: 1.1rem; padding: 4px; border-radius: 6px;
    transition: color 0.2s, background 0.2s;
}
.delete-question-btn:hover { color: #ef4444; background: rgba(239,68,68,0.1); }

/* Quiz settings form */
.quiz-settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 20px; }
.quiz-settings-grid .form-group { display: flex; flex-direction: column; gap: 6px; }
.quiz-settings-grid label { font-size: 0.82rem; color: var(--text-secondary); font-weight: 500; }
.quiz-settings-grid input,
.quiz-settings-grid textarea {
    background: rgba(0,0,0,0.3); border: 1px solid rgba(255,255,255,0.12);
    border-radius: 8px; color: #fff; padding: 10px 14px; font-size: 0.92rem;
    font-family: inherit; transition: border-color 0.2s;
}
.quiz-settings-grid input:focus,
.quiz-settings-grid textarea:focus { outline: none; border-color: rgba(16,185,129,0.5); }

/* ── Full-screen Student Quiz Take Modal ─────────────────────────────────── */
.quiz-take-overlay {
    position: fixed; inset: 0; z-index: 1200;
    background: #05120e;
    display: flex; flex-direction: column;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s;
}
.quiz-take-overlay.active { opacity: 1; pointer-events: all; }

.quiz-take-header {
    padding: 16px 28px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    display: flex; align-items: center; justify-content: space-between;
    background: rgba(0,0,0,0.3);
    flex-shrink: 0;
}
.quiz-take-title { font-size: 1rem; font-weight: 600; color: #fff; }
.quiz-take-timer {
    font-size: 1.4rem; font-weight: 800; color: var(--primary, #10b981);
    font-variant-numeric: tabular-nums; letter-spacing: 0.04em;
    background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.3);
    border-radius: 10px; padding: 6px 16px;
}
.quiz-take-timer.warning { color: #f59e0b; background: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.3); }
.quiz-take-timer.danger  { color: #ef4444; background: rgba(239,68,68,0.12);  border-color: rgba(239,68,68,0.3);  animation: pulse-timer 1s ease-in-out infinite; }
@keyframes pulse-timer { 0%,100% { opacity:1; } 50% { opacity:0.6; } }

.quiz-take-body {
    flex: 1; overflow-y: auto;
    display: flex; align-items: flex-start; justify-content: center;
    padding: 36px 20px;
}
.quiz-take-card {
    width: 100%; max-width: 680px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 18px; padding: 32px;
}

.quiz-progress-bar-wrap { width: 100%; background: rgba(255,255,255,0.08); border-radius: 99px; height: 5px; margin-bottom: 28px; overflow: hidden; }
.quiz-progress-bar-fill { height: 100%; background: var(--primary, #10b981); border-radius: 99px; transition: width 0.4s; }

.quiz-q-counter { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 8px; }
.quiz-q-text { font-size: 1.12rem; font-weight: 600; color: #fff; line-height: 1.6; margin-bottom: 26px; }

.quiz-choices { display: flex; flex-direction: column; gap: 12px; }
.quiz-choice-btn {
    width: 100%; text-align: left;
    background: rgba(255,255,255,0.04); border: 2px solid rgba(255,255,255,0.1);
    border-radius: 12px; padding: 14px 18px;
    color: #fff; font-size: 0.95rem; font-family: inherit;
    cursor: pointer; display: flex; align-items: center; gap: 14px;
    transition: border-color 0.2s, background 0.2s;
}
.quiz-choice-btn:hover { border-color: rgba(16,185,129,0.5); background: rgba(16,185,129,0.07); }
.quiz-choice-btn.selected { border-color: var(--primary, #10b981); background: rgba(16,185,129,0.12); }
.quiz-choice-btn.correct  { border-color: #10b981; background: rgba(16,185,129,0.18); }
.quiz-choice-btn.wrong    { border-color: #ef4444; background: rgba(239,68,68,0.12); }

.quiz-choice-letter {
    width: 32px; height: 32px; border-radius: 50%;
    background: rgba(255,255,255,0.08); font-weight: 700; font-size: 0.85rem;
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.selected  .quiz-choice-letter { background: var(--primary, #10b981); color: #000; }
.correct   .quiz-choice-letter { background: #10b981; color: #000; }
.wrong     .quiz-choice-letter { background: #ef4444; color: #fff; }

.quiz-take-footer {
    padding: 18px 28px;
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex; justify-content: space-between; align-items: center;
    background: rgba(0,0,0,0.3); flex-shrink: 0;
}

/* ── Quiz Results Screen ─────────────────────────────────────────────────── */
.quiz-results-screen {
    width: 100%; max-width: 700px;
    text-align: center;
}
.quiz-score-ring {
    width: 140px; height: 140px; border-radius: 50%;
    background: conic-gradient(var(--primary, #10b981) calc(var(--pct, 0) * 1%), rgba(255,255,255,0.08) 0%);
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 24px;
    position: relative;
}
.quiz-score-inner {
    width: 110px; height: 110px; border-radius: 50%;
    background: #05120e;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.quiz-score-pct { font-size: 1.8rem; font-weight: 800; color: var(--primary, #10b981); }
.quiz-score-label { font-size: 0.75rem; color: var(--text-secondary); }

.quiz-grade-badge {
    display: inline-block; font-size: 1.5rem; font-weight: 800;
    padding: 8px 24px; border-radius: 12px; margin-bottom: 12px;
}
.quiz-grade-badge.A  { background: rgba(16,185,129,0.2); color: #10b981; }
.quiz-grade-badge.B  { background: rgba(59,130,246,0.2); color: #3b82f6; }
.quiz-grade-badge.C  { background: rgba(245,158,11,0.2); color: #f59e0b; }
.quiz-grade-badge.D  { background: rgba(249,115,22,0.2); color: #f97316; }
.quiz-grade-badge.F  { background: rgba(239,68,68,0.2);  color: #ef4444; }

.quiz-breakdown { text-align: left; margin-top: 28px; }
.breakdown-item {
    padding: 14px 18px; border-radius: 10px; margin-bottom: 10px;
    border: 1px solid rgba(255,255,255,0.06);
}
.breakdown-item.correct { background: rgba(16,185,129,0.07); border-color: rgba(16,185,129,0.2); }
.breakdown-item.wrong   { background: rgba(239,68,68,0.06);  border-color: rgba(239,68,68,0.18); }
.breakdown-q { font-size: 0.9rem; font-weight: 600; color: #fff; margin-bottom: 6px; }
.breakdown-meta { font-size: 0.8rem; color: var(--text-secondary); }
.breakdown-meta span { font-weight: 600; }
.breakdown-meta .correct-txt { color: #10b981; }
.breakdown-meta .wrong-txt   { color: #ef4444; }
.breakdown-explanation { font-size: 0.8rem; color: var(--text-secondary); margin-top: 6px; padding-left: 10px; border-left: 2px solid rgba(16,185,129,0.4); }

/* Results history row */
.result-history-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 16px; border-radius: 10px; margin-bottom: 8px;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07);
}
.result-history-row:hover { background: rgba(255,255,255,0.05); }

/* Upload area */
.quiz-upload-area {
    border: 2px dashed rgba(16,185,129,0.35);
    border-radius: 14px; padding: 36px 20px;
    text-align: center; cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    background: rgba(16,185,129,0.03);
}
.quiz-upload-area:hover { border-color: rgba(16,185,129,0.7); background: rgba(16,185,129,0.07); }
.quiz-upload-area.dragover { border-color: var(--primary, #10b981); background: rgba(16,185,129,0.1); }
.quiz-upload-icon { font-size: 2.5rem; margin-bottom: 12px; }
.quiz-upload-area h4 { color: #fff; margin: 0 0 6px; }
.quiz-upload-area p  { color: var(--text-secondary); font-size: 0.85rem; margin: 0; }

@media (max-width: 640px) {
    .quiz-mode-grid { grid-template-columns: 1fr; }
    .choices-grid   { grid-template-columns: 1fr; }
    .quiz-settings-grid { grid-template-columns: 1fr; }
}