/* ===============================================
   CSS Variables & Base Styles
   =============================================== */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #242424;
    --bg-card-hover: #2a2a2a;

    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;

    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-success: #22c55e;
    --accent-error: #ef4444;
    --accent-warning: #f59e0b;

    --border-color: #333333;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);

    /* Typography */
    --font-en: 'Inter', sans-serif;
    --font-ar: 'Cairo', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* ===============================================
   Reset & Base
   =============================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-en);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* RTL Support */
html[dir="rtl"] body {
    font-family: var(--font-ar);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-secondary);
}

/* ===============================================
   Language Toggle
   =============================================== */
.lang-toggle {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.lang-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

html[dir="rtl"] .lang-toggle {
    right: auto;
    left: var(--spacing-md);
}

/* ===============================================
   Hero Section
   =============================================== */
.hero {
    padding: var(--spacing-2xl) var(--spacing-md);
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-bottom: 1px solid var(--border-color);
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-lg);
    font-size: 2.5rem;
    color: white;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--text-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slogan {
    font-size: 1.25rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-ar);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===============================================
   Container
   =============================================== */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* ===============================================
   Stats Section
   =============================================== */
.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-card i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===============================================
   Sections
   =============================================== */
.section {
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

/* ===============================================
   Subject Cards
   =============================================== */
.subjects-grid {
    display: grid;
    gap: var(--spacing-md);
}

.subject-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.subject-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.subject-card.coming-soon {
    opacity: 0.6;
    cursor: default;
}

.subject-card.coming-soon:hover {
    transform: none;
    border-color: var(--border-color);
}

.subject-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.subject-info {
    flex: 1;
}

.subject-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.subject-code {
    display: inline-block;
    padding: 2px 8px;
    background: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.subject-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.subject-meta {
    display: flex;
    gap: var(--spacing-lg);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.meta-item i {
    color: var(--accent-primary);
}

.subject-arrow {
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.subject-card:hover .subject-arrow {
    transform: translateX(4px);
    color: var(--accent-primary);
}

html[dir="rtl"] .subject-card:hover .subject-arrow {
    transform: translateX(-4px);
}

html[dir="rtl"] .subject-arrow i {
    transform: rotate(180deg);
}

/* ===============================================
   About Section
   =============================================== */
.about-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.about-card i {
    font-size: 2rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.about-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.about-card .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

/* ===============================================
   Buttons
   =============================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
}

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

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

.btn-secondary {
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
}

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

.btn-secondary i {
    color: inherit;
}

/* ===============================================
   Footer
   =============================================== */
.footer {
    text-align: center;
    padding: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.footer-note {
    font-family: var(--font-ar);
    color: var(--accent-primary);
    margin-top: var(--spacing-sm);
}

/* ===============================================
   Responsive
   =============================================== */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }

    .stats {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }

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

    .stat-number {
        font-size: 1.5rem;
    }

    .subject-card {
        flex-direction: column;
        text-align: center;
    }

    .subject-meta {
        justify-content: center;
    }

    .subject-arrow {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .lang-toggle .lang-text {
        display: none;
    }

    .hero {
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .logo {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }

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