/* ============================================
   Modern Design System - Arisa Roleplay 2026
   ============================================ */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #0CAFE0;
    --primary-dark: #08a0c0;
    --primary-light: #4fd9f5;
    --dark-bg: #0a0e1a;
    --dark-surface: #121821;
    --dark-surface-light: #1a2332;
    --text-primary: #E6EDF3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    /* Spacing (8px grid system) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(12, 175, 224, 0.3);
    
    /* Typography */
    --font-display: 'Outfit', 'Segoe UI', system-ui, sans-serif;
    --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--dark-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Video Background */
.video-bg {
    position: fixed;
    inset: 0;
    z-index: -2;
    overflow: hidden;
}

.video-bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.6);
}

/* Overlay */
.overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 14, 26, 0.7) 0%,
        rgba(10, 14, 26, 0.85) 50%,
        rgba(10, 14, 26, 0.95) 100%
    );
    z-index: -1;
}

/* ============================================
   Navbar
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(10, 14, 26, 0.3);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(12, 175, 224, 0.1);
    transition: all var(--transition-normal);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(12, 175, 224, 0.05) 50%, 
        transparent 100%
    );
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    flex-shrink: 0;
}

.logo img {
    height: 56px;
    transition: transform var(--transition-normal), filter var(--transition-normal);
}

.logo img:hover {
    transform: scale(1.05);
    filter: drop-shadow(0 0 12px rgba(12, 175, 224, 0.5));
}

.nav-menu {
    display: flex;
    gap: var(--space-xs);
    align-items: center;
}

.nav-link {
    position: relative;
    padding: var(--space-sm) var(--space-lg);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--primary);
    transition: transform var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(12, 175, 224, 0.1);
}

.nav-link:hover::before {
    transform: translateX(-50%) scaleX(1);
}

.nav-link--discord {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: rgba(88, 101, 242, 0.1);
    border: 1px solid rgba(88, 101, 242, 0.3);
    color: #5865F2;
}

.nav-link--discord:hover {
    background: rgba(88, 101, 242, 0.2);
    border-color: #5865F2;
    color: #fff;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    position: relative;
}

.hero-content {
    max-width: 900px;
    animation: fadeInUp 1s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.hero-title-line {
    display: block;
    background: linear-gradient(135deg, #fff 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-line--accent {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 40px rgba(12, 175, 224, 0.5));
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    font-weight: 400;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 16px 32px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #000;
    box-shadow: var(--shadow-glow);
    font-weight: 700;
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(12, 175, 224, 0.6);
}

.btn--secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    backdrop-filter: blur(8px);
}

.btn--secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.scroll-indicator-line {
    width: 100%;
    height: 30%;
    background: var(--primary);
    animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% { transform: translateY(-100%); }
    50% { transform: translateY(300%); }
}

/* ============================================
   Features Section
   ============================================ */

.features {
    padding: var(--space-3xl) var(--space-xl);
    background: linear-gradient(180deg, transparent 0%, rgba(10, 14, 26, 0.6) 100%);
}

.features-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.feature-card {
    padding: var(--space-2xl);
    background: rgba(18, 24, 33, 0.4);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.feature-card:hover::before {
    transform: translateX(100%);
}

.feature-card:hover {
    transform: translateY(-8px);
    background: rgba(18, 24, 33, 0.6);
    border-color: rgba(12, 175, 224, 0.3);
    box-shadow: 0 12px 40px rgba(12, 175, 224, 0.15);
}

.feature-card--featured {
    background: rgba(12, 175, 224, 0.05);
    border-color: rgba(12, 175, 224, 0.3);
}

.feature-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, rgba(12, 175, 224, 0.1), rgba(12, 175, 224, 0.05));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    color: var(--primary);
    transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, rgba(12, 175, 224, 0.2), rgba(12, 175, 224, 0.1));
    box-shadow: var(--shadow-glow);
}

.feature-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.feature-description {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* ============================================
   Stats Section
   ============================================ */

.stats {
    padding: var(--space-3xl) var(--space-xl);
    background: rgba(0, 0, 0, 0.3);
}

.stats-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: 56px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--space-sm);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.stat-divider {
    width: 2px;
    height: 60px;
    background: linear-gradient(180deg, transparent, var(--primary), transparent);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--space-2xl) var(--space-xl);
    background: rgba(10, 14, 26, 0.9);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-text {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.footer-credit {
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-credit span {
    color: var(--primary);
    font-weight: 600;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--space-lg);
    }
    
    .nav-menu {
        gap: var(--space-xs);
    }
    
    .nav-link {
        padding: var(--space-sm) var(--space-md);
        font-size: 13px;
    }
    
    .logo img {
        height: 48px;
    }
    
    .hero {
        padding: var(--space-2xl) var(--space-lg);
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .features-container {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 15px;
    }
    
    .stat-divider {
        display: none;
    }
    
    .stat-number {
        font-size: 40px;
    }
}

@media (max-width: 480px) {
    .nav-link span {
        display: none;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================
   Animations & Effects
   ============================================ */

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

/* Smooth page transitions */
.page-transition {
    animation: fadeIn 0.5s ease;
}

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