/* ============================================
   PRISTINA - PREMIUM AI AGENCY
   2026 Modern Design
   ============================================ */

/* ============================================
   CSS VARIABLES - Design Tokens
   ============================================ */
:root {
    /* Colors - Premium Palette */
    --bg-primary: #000000;
    --bg-secondary: #0A0E27;
    --accent-cyan: #00D9FF;
    --accent-blue: #007AFF;
    --accent-purple: #6366F1;
    --text-primary: #FFFFFF;
    --text-secondary: #A8AABC;
    --text-muted: #6B7280;
    --border-color: #1F2937;
    --border-accent: rgba(0, 217, 255, 0.3);

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Helvetica Neue', sans-serif;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 48px;
    --font-size-5xl: 64px;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --spacing-3xl: 80px;
    --spacing-4xl: 120px;

    /* Animations */
    --transition-fast: 0.2s ease-in-out;
    --transition-base: 0.4s ease-in-out;
    --transition-slow: 0.6s ease-in-out;

    /* Effects */
    --blur-sm: blur(8px);
    --blur-md: blur(16px);
    --blur-lg: blur(24px);
    --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.2);
    --shadow-glow-strong: 0 0 30px rgba(0, 217, 255, 0.4);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
}

h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

p {
    color: var(--text-secondary);
    line-height: 1.7;
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: var(--blur-sm);
    border-bottom: 1px solid var(--border-accent);
    padding: var(--spacing-lg) 0;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
}

/* ============================================
   BUTTONS
   ============================================ */
.cta-button,
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 8px;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-family);
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.cta-button {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    border: 1px solid var(--accent-cyan);
}

.cta-button:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow-strong);
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    color: var(--bg-primary);
    border: 1px solid var(--accent-cyan);
}

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

.btn-secondary {
    background: transparent;
    color: var(--accent-cyan);
    border: 2px solid var(--accent-cyan);
}

.btn-secondary:hover {
    background: rgba(0, 217, 255, 0.1);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    transform: translateY(-3px);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    padding-top: calc(80px + var(--spacing-2xl));
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-30px);
    }
}

.hero-content {
    max-width: 900px;
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-in-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-headline {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.15;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subheading {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   SECTION CONTAINER
   ============================================ */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-3xl);
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
    padding: var(--spacing-4xl) var(--spacing-lg);
    background: var(--bg-primary);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 1px;
    height: 100%;
    background: linear-gradient(180deg, transparent, var(--border-accent), transparent);
    transform: translateX(-50%);
    pointer-events: none;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.service-card {
    padding: var(--spacing-2xl);
    background: rgba(10, 14, 39, 0.6);
    border: 1px solid var(--border-accent);
    border-radius: 16px;
    backdrop-filter: var(--blur-md);
    transition: all var(--transition-base);
    text-align: center;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 1s ease-in-out backwards;
}

.service-card:nth-child(1) {
    animation-delay: 0.1s;
}

.service-card:nth-child(2) {
    animation-delay: 0.2s;
}

.service-card:nth-child(3) {
    animation-delay: 0.3s;
}

.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.service-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

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

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
}

.service-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-2xl);
}

.service-card p {
    font-size: var(--font-size-base);
    line-height: 1.8;
}

/* ============================================
   STATS SECTION
   ============================================ */
.stats {
    padding: var(--spacing-4xl) var(--spacing-lg);
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-top: 1px solid var(--border-accent);
    border-bottom: 1px solid var(--border-accent);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    text-align: center;
}

.stat-item {
    animation: fadeInUp 1s ease-in-out backwards;
}

.stat-item:nth-child(1) {
    animation-delay: 0.1s;
}

.stat-item:nth-child(2) {
    animation-delay: 0.2s;
}

.stat-item:nth-child(3) {
    animation-delay: 0.3s;
}

.stat-number {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.stat-item p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* ============================================
   FINAL CTA SECTION
   ============================================ */
.final-cta {
    padding: var(--spacing-4xl) var(--spacing-lg);
    background: var(--bg-primary);
    text-align: center;
}

.final-cta h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.final-cta p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-accent);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.footer-section p {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: var(--text-secondary);
    transition: color var(--transition-base);
}

.footer-section ul li a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-accent);
    color: var(--text-muted);
    font-size: var(--font-size-base);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    h1 {
        font-size: var(--font-size-4xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

    .hero {
        min-height: auto;
        padding-top: calc(70px + var(--spacing-xl));
        padding-bottom: var(--spacing-2xl);
    }

    .hero-headline {
        font-size: 2.5rem;
    }

    .hero-subheading {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-xl);
    }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }

    .btn {
        width: 100%;
    }

    .services {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .final-cta {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .final-cta h2 {
        font-size: var(--font-size-2xl);
    }

    .stats {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .navbar-container {
        padding: 0 var(--spacing-md);
    }

    .logo {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .hero-headline {
        font-size: 2rem;
        margin-bottom: var(--spacing-md);
    }

    .hero-ctas {
        gap: var(--spacing-sm);
    }

    .cta-button,
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .stat-number {
        font-size: 2rem;
    }

    .hero::before {
        width: 400px;
        height: 400px;
        right: -30%;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .service-card {
        padding: var(--spacing-lg);
    }

    .service-icon {
        font-size: 2rem;
    }
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s ease-in-out forwards;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}