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

/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
    /* Telegram-inspired colors */
    --primary-color: #3390ec;
    --primary-hover: #2b7dd1;
    --primary-active: #2479c7;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    
    /* Text colors */
    --text-primary: #222222;
    --text-secondary: #6c757d;
    --text-muted: #999999;
    --text-light: #ffffff;
    
    /* Background colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e8e8e8;
    --bg-overlay: rgba(0, 0, 0, 0.5);
    
    /* Gradient backgrounds */
    --gradient-primary: linear-gradient(90deg, #00BCD4, #004D56);
    --gradient-secondary: linear-gradient(135deg, #3390ec 0%, #54a0ff 100%);
    
    /* Border & Shadow */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-arabic: 'Cairo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Courier New', monospace;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #ffffff;
        --text-secondary: #b8b8b8;
        --text-muted: #8e8e8e;
        
        --bg-primary: #1e1e1e;
        --bg-secondary: #2d2d2d;
        --bg-tertiary: #3a3a3a;
        --border-color: #3a3a3a;
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--gradient-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: var(--spacing-lg);
    line-height: 1.6;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: 640px;
    margin: 0 auto;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Preview Card (Main Component)
   ============================================ */
.preview-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.preview-content {
    padding: var(--spacing-xl);
}

.app-icon {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.app-icon img {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    background: #fff;
}

/* ============================================
   Content Styles
   ============================================ */
.content-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.content-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

.content-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 400;
}

.preview-image-container {
    width: 100px;
    margin: 0 auto;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.preview-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    max-height: 400px;
}

.content-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* ============================================
   Content Meta Information
   ============================================ */
.content-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-lg);
}
.content-meta.col {
    flex-direction: column;
    align-items: flex-start;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 14px;
    color: var(--text-secondary);
}

.meta-icon {
    font-size: 18px;
}

.meta-text {
    font-weight: 500;
}

/* ============================================
   Action Buttons
   ============================================ */
.actions {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.primary-btn,
.secondary-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    font-family: var(--font-family);
    text-decoration: none;
}

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

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(51, 144, 236, 0.4);
}

.primary-btn:active {
    background: var(--primary-active);
    transform: translateY(0);
}

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

.secondary-btn:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

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

.btn-icon {
    width: 20px;
    height: 20px;
}

.link-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 14px;
    cursor: pointer;
    padding: var(--spacing-xs);
    font-family: var(--font-family);
    transition: var(--transition);
}

.link-btn:hover {
    text-decoration: underline;
}

/* ============================================
   App Store Links
   ============================================ */
.app-store-links {
    text-align: center;
    margin-top: var(--spacing-md);
}

.helper-text {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.store-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

.store-btn {
    display: inline-block;
    transition: var(--transition);
}

.store-btn:hover {
    transform: scale(1.05);
}

.store-btn img {
    height: auto;
    width: 150px;
}

/* ============================================
   Footer & Countdown
   ============================================ */
.footer {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: var(--spacing-sm);
}

#countdown {
    font-weight: 600;
    color: var(--primary-color);
}

/* ============================================
   Loading State
   ============================================ */
.loading-state {
    padding: var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-state p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ============================================
   Error State
   ============================================ */
.error-state {
    padding: var(--spacing-2xl);
    text-align: center;
}

.error-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
}

.error-state h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.error-state p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Toast Notification
   ============================================ */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #3a3a3a;
    color: var(--text-light);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    z-index: 1000;
    transition: transform 0.3s ease-out;
    max-width: 90%;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   Home Page Styles
   ============================================ */
.home-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
}

.hero-section {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.app-icon-large {
    margin-bottom: var(--spacing-lg);
}

.app-icon-large img {
    width: 120px;
    height: 120px;
    border-radius: 28px;
    box-shadow: var(--shadow-md);
    background: #fff;
}

.hero-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.features-section {
    margin-bottom: var(--spacing-2xl);
}

.features-section h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-sm);
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.feature-card code {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-family-mono);
    background: var(--bg-tertiary);
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
}

.cta-section {
    text-align: center;
}

.cta-section h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Error Page Styles
   ============================================ */
.error-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
    text-align: center;
}

.error-icon-large {
    font-size: 80px;
    margin-bottom: var(--spacing-lg);
}

.error-title {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.error-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.error-path {
    margin-bottom: var(--spacing-lg);
}

.error-path code {
    font-family: var(--font-family-mono);
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
}

.error-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.error-actions .primary-btn,
.error-actions .secondary-btn {
    width: auto;
    min-width: 140px;
}

.error-stack {
    text-align: left;
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    margin-top: var(--spacing-lg);
    overflow-x: auto;
}

.error-stack code {
    font-family: var(--font-family-mono);
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   Utility Classes
   ============================================ */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 640px) {
    body {
        padding: var(--spacing-md);
    }
    
    .preview-content {
        padding: var(--spacing-lg);
    }
    
    .actions {
        padding: 0;
    }
    
    .content-title {
        font-size: 20px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .store-btn img {
        height: auto;
        width: 120px;
    }
    .preview-image {
        max-height: 200px;
    }
    .primary-btn, .secondary-btn {
        padding: 10px 16px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .app-icon img {
        width: 64px;
        height: 64px;
    }
    
    .content-meta {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .error-actions {
        flex-direction: column;
    }
    
    .error-actions .primary-btn,
    .error-actions .secondary-btn {
        width: 100%;
    }
}

/* ============================================
   Language Switcher
   ============================================ */
.language-switcher {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1000;
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-primary);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-md);
}

[dir="rtl"] .language-switcher {
    right: auto;
    left: var(--spacing-lg);
}

.lang-btn {
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.lang-btn.active {
    color: var(--text-light);
    background: var(--primary-color);
    border-color: var(--primary-color);
}

/* ============================================
   RTL Support
   ============================================ */
[dir="rtl"] body {
    text-align: right;
    font-family: var(--font-family-arabic);
}

[dir="rtl"] * {
    font-family: var(--font-family-arabic);
}

[dir="rtl"] .meta-item {
    flex-direction: row;
}

[dir="rtl"] .btn-icon {
    margin-left: 8px;
    margin-right: 0;
}

[dir="rtl"] .content-meta {
    direction: rtl;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    body {
        background: white;
    }
    
    .actions,
    .footer,
    .toast,
    .language-switcher {
        display: none;
    }
}