/* ===================================
   AzizWares Premium Design System
   ================================== */

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

/* CSS Variables - Design Tokens */
:root {
    /* Primary Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-600: #667eea;
    --primary-700: #5a67d8;
    --primary-800: #4c51bf;
    
    /* Accent Colors */
    --accent-green: #10b981;
    --accent-teal: #14b8a6;
    --accent-emerald-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
    
    /* Neutral Colors - Light Mode */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --surface-glass: rgba(255, 255, 255, 0.7);
    --surface-elevated: rgba(255, 255, 255, 0.9);
    
    /* Text Colors - Light Mode */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;
    
    /* Border Colors */
    --border-subtle: rgba(148, 163, 184, 0.2);
    --border-default: rgba(148, 163, 184, 0.3);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    
    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Dark Mode Variables */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --surface-glass: rgba(30, 41, 59, 0.8);
        --surface-elevated: rgba(51, 65, 85, 0.9);
        
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-tertiary: #64748b;
        
        --border-subtle: rgba(148, 163, 184, 0.1);
        --border-default: rgba(148, 163, 184, 0.15);
        
        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
    }
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background */
.bg-animated {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-animated::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 40% 60%, rgba(16, 185, 129, 0.1) 0%, transparent 40%);
    animation: bgPulse 15s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(-5%, -5%) scale(1.1);
        opacity: 0.8;
    }
}

/* Container */
.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-xl);
}

/* Glass Card Effect */
.card {
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2xl) var(--space-3xl);
    animation: cardFadeIn 0.6s ease-out;
}

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

/* Typography */
h1 {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--space-2xl) 0 var(--space-md);
    position: relative;
    padding-left: var(--space-lg);
}

h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--space-xl);
}

.date {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-xl);
}

.date::before {
    content: '📅';
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

/* Lists */
ul, ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-lg);
}

li {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    position: relative;
    padding-left: var(--space-sm);
}

li::marker {
    color: var(--primary-600);
}

/* Highlight Box */
.highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-left: 4px solid var(--primary-600);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
}

.highlight strong {
    color: var(--primary-600);
}

/* Links */
a {
    color: var(--primary-600);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

a:hover {
    color: var(--primary-700);
}

a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition-base);
}

a:hover::after {
    width: 100%;
}

/* App Cards Grid (for index page) */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.app-card {
    position: relative;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    background: var(--primary-gradient);
    color: var(--text-inverse);
    text-decoration: none;
    overflow: hidden;
    transition: var(--transition-spring);
    cursor: pointer;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition-base);
}

.app-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-glow);
}

.app-card:hover::before {
    opacity: 1;
}

.app-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.app-card p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    margin: 0;
}

.app-card .arrow {
    position: absolute;
    bottom: var(--space-xl);
    right: var(--space-xl);
    font-size: 1.5rem;
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition-base);
}

.app-card:hover .arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Salah App Card - Special Green Theme */
.app-card.salah {
    background: var(--accent-emerald-gradient);
}

/* Footer */
.footer {
    margin-top: var(--space-3xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-default);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.footer p {
    margin: 0;
    color: var(--text-tertiary);
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--space-xl);
    transition: var(--transition-fast);
}

.back-link:hover {
    color: var(--primary-600);
}

.back-link::before {
    content: '←';
    font-size: 1.1rem;
}

.back-link::after {
    display: none;
}

/* Header with Logo */
.header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.header .logo {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--space-md);
    }
    
    .card {
        padding: var(--space-xl);
        border-radius: var(--radius-lg);
    }
    
    h2 {
        padding-left: var(--space-md);
    }
    
    .app-grid {
        grid-template-columns: 1fr;
    }
}

/* 404 Page Specific */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    text-align: center;
}

.error-code {
    font-size: 8rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-md);
    animation: errorPulse 2s ease-in-out infinite;
}

@keyframes errorPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.02);
    }
}

.error-message {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--primary-gradient);
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-spring);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    color: var(--text-inverse);
}

.btn-primary::after {
    display: none;
}

/* Navigation Pills (for Privacy/Terms toggle) */
.nav-pills {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.nav-pill {
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    transition: var(--transition-fast);
}

.nav-pill:hover,
.nav-pill.active {
    background: var(--primary-gradient);
    color: var(--text-inverse);
}

.nav-pill::after {
    display: none;
}

/* Scroll Animation */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 0.6s ease forwards;
    }
    
    .fade-in:nth-child(1) { animation-delay: 0.1s; }
    .fade-in:nth-child(2) { animation-delay: 0.2s; }
    .fade-in:nth-child(3) { animation-delay: 0.3s; }
    .fade-in:nth-child(4) { animation-delay: 0.4s; }
    .fade-in:nth-child(5) { animation-delay: 0.5s; }
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}