/* ========================================
   ShadowTech - Styles
   ======================================== */

:root {
    --color-bg: #0a0a0b;
    --color-surface: #111113;
    --color-surface-hover: #1a1a1d;
    --color-border: rgba(255, 255, 255, 0.06);
    --color-text-primary: #f0f0f2;
    --color-text-secondary: rgba(240, 240, 242, 0.55);
    --color-text-tertiary: rgba(240, 240, 242, 0.35);
    --color-accent: #6366f1;
    --color-accent-soft: rgba(99, 102, 241, 0.15);
    --color-glow-1: #6366f1;
    --color-glow-2: #8b5cf6;
    --color-glow-3: #06b6d4;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

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

/* ========================================
   Navigation
   ======================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 2rem;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    background: rgba(10, 10, 11, 0.8);
    border-bottom: 1px solid var(--color-border);
    transition: background 0.3s ease;
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--color-text-primary);
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 4rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--color-glow-1);
    top: -200px;
    right: -100px;
    opacity: 0.2;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--color-glow-2);
    bottom: -150px;
    left: -100px;
    opacity: 0.15;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--color-glow-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.08;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.orb-3 {
    animation-name: float-center;
}

@keyframes float-center {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    33% { transform: translate(-45%, -55%) scale(1.1); }
    66% { transform: translate(-55%, -45%) scale(0.9); }
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    animation: fadeUp 1s var(--ease-out-expo) forwards;
    opacity: 0;
}

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

.hero-title {
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
}

.title-accent {
    background: linear-gradient(135deg, var(--color-glow-1), var(--color-glow-2), var(--color-glow-3));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    font-weight: 400;
    line-height: 1.7;
    max-width: 540px;
    margin: 0 auto 2.5rem;
    letter-spacing: -0.01em;
}

.hero-divider {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-glow-1), var(--color-glow-3));
    margin: 0 auto;
    border-radius: 1px;
    opacity: 0.6;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    opacity: 0.4;
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.2; transform: scaleY(0.6); }
    50% { opacity: 0.5; transform: scaleY(1); }
}

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

.features {
    padding: 6rem 2rem 8rem;
    position: relative;
}

.features-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    transition: all 0.4s var(--ease-out-expo);
    opacity: 0;
    transform: translateY(20px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    background: var(--color-surface-hover);
    border-color: rgba(99, 102, 241, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(99, 102, 241, 0.06);
}

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--color-accent-soft);
    color: var(--color-accent);
    margin-bottom: 1.25rem;
}

.feature-icon svg {
    width: 22px;
    height: 22px;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

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

.footer {
    padding: 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.footer-logo-icon {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    opacity: 0.7;
}

.footer-copy {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

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

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature-card {
        padding: 2rem 1.5rem;
    }

    .footer-inner {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .nav {
        padding: 0 1.25rem;
    }

    .hero {
        padding: 6rem 1.25rem 4rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }
}