/* ==========================================
   CSS Custom Properties
   ========================================== */
:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #121212;
    --bg-card: #1a1a1a;
    --accent: #eb7150;
    --accent-hover: #f58567;
    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --grid-line: rgba(255, 255, 255, 0.03);
    --border-subtle: rgba(255, 255, 255, 0.08);

    /* Typography */
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 100px;
    --container-max: 1200px;
    --header-height: 72px;

    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================
   Background Effects
   ========================================== */
.bg-grid,
.bg-noise,
.bg-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.bg-grid {
    background-image:
        repeating-linear-gradient(
            0deg,
            var(--grid-line) 0px,
            var(--grid-line) 1px,
            transparent 1px,
            transparent 80px
        ),
        repeating-linear-gradient(
            90deg,
            var(--grid-line) 0px,
            var(--grid-line) 1px,
            transparent 1px,
            transparent 80px
        );
    opacity: 0.6;
}

.bg-noise {
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
}

.bg-glow {
    background: radial-gradient(
        ellipse 80% 50% at 50% 20%,
        rgba(235, 113, 80, 0.08) 0%,
        transparent 60%
    );
}

/* ==========================================
   Typography Utilities
   ========================================== */
.mono {
    font-family: var(--font-mono);
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* ==========================================
   Header / Navigation
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 100;
    transition: background-color var(--transition-base), backdrop-filter var(--transition-base);
}

.header.scrolled {
    background-color: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.nav-links {
    display: none;
    gap: 32px;
}

.nav-link {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--accent);
}

.nav-back {
    font-size: 0.8125rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.nav-back:hover {
    color: var(--accent);
}

/* ==========================================
   Layout
   ========================================== */
main {
    position: relative;
    z-index: 1;
}

.section {
    position: relative;
    padding: var(--section-padding) 24px;
    max-width: var(--container-max);
    margin: 0 auto;
}

/* Section Headers */
.section-header {
    margin-bottom: 60px;
    text-align: center;
}

.section-label {
    display: block;
    font-size: 0.75rem;
    color: var(--accent);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: calc(var(--header-height) + 40px) 24px 60px;
    position: relative;
}

.hero-content {
    max-width: 700px;
    margin-bottom: 48px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero-tagline {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    font-weight: 300;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 500px;
    margin: 0 auto 32px;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.hero-image {
    max-width: 600px;
    width: 100%;
}

.hero-image img {
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    box-shadow:
        0 4px 24px rgba(0, 0, 0, 0.4),
        0 0 60px rgba(235, 113, 80, 0.08);
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 6px;
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 500;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(235, 113, 80, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.0625rem;
}

/* ==========================================
   Features Section
   ========================================== */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.feature-card {
    padding: 28px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    transition:
        border-color var(--transition-base),
        transform var(--transition-base);
}

.feature-card:hover {
    border-color: rgba(235, 113, 80, 0.3);
    transform: translateY(-2px);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: rgba(235, 113, 80, 0.1);
    border-radius: 8px;
    margin-bottom: 20px;
    color: var(--accent);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.feature-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   Screenshots Section
   ========================================== */
.screenshots-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

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

.screenshot-wrapper {
    margin-bottom: 16px;
}

.screenshot-wrapper img {
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    margin: 0 auto;
}

.screenshot-caption {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ==========================================
   Download Section
   ========================================== */
.download {
    text-align: center;
    padding-top: 80px;
    padding-bottom: 80px;
}

.download-content {
    max-width: 500px;
    margin: 0 auto;
}

.download-title {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.download-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.download-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 16px;
}

.download-source {
    display: inline-block;
    margin-top: 24px;
    font-size: 0.8125rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.download-source:hover {
    color: var(--accent);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border-subtle);
    padding: 48px 24px;
}

.footer-content {
    max-width: var(--container-max);
    margin: 0 auto;
    text-align: center;
}

.footer-credit {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.footer-credit a {
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.footer-credit a:hover {
    color: var(--accent);
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 24px;
}

.footer-link {
    font-size: 0.8125rem;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--accent);
}

.footer-copyright {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ==========================================
   Animations
   ========================================== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.6s ease forwards;
    animation-delay: calc(var(--delay, 0) * 100ms + 200ms);
}

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

/* Scroll Animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity 0.6s ease,
        transform 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.features-grid .scroll-animate:nth-child(1) { transition-delay: 0ms; }
.features-grid .scroll-animate:nth-child(2) { transition-delay: 50ms; }
.features-grid .scroll-animate:nth-child(3) { transition-delay: 100ms; }
.features-grid .scroll-animate:nth-child(4) { transition-delay: 150ms; }
.features-grid .scroll-animate:nth-child(5) { transition-delay: 200ms; }
.features-grid .scroll-animate:nth-child(6) { transition-delay: 250ms; }

.screenshots-grid .scroll-animate:nth-child(1) { transition-delay: 0ms; }
.screenshots-grid .scroll-animate:nth-child(2) { transition-delay: 100ms; }
.screenshots-grid .scroll-animate:nth-child(3) { transition-delay: 200ms; }

/* ==========================================
   Responsive - Tablet
   ========================================== */
@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }

    .section {
        padding: var(--section-padding) 48px;
    }

    .hero-cta {
        flex-direction: row;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .screenshots-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }

    .screenshot-wrapper img {
        max-width: 100%;
    }
}

/* ==========================================
   Responsive - Desktop
   ========================================== */
@media (min-width: 1024px) {
    .nav {
        padding: 0 80px;
    }

    .section {
        padding: var(--section-padding) 80px;
    }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }

    .feature-card {
        padding: 32px;
    }
}

/* ==========================================
   Focus States (Accessibility)
   ========================================== */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

/* ==========================================
   Reduced Motion
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .scroll-animate {
        opacity: 1;
        transform: none;
    }

    .animate-fade-up {
        opacity: 1;
        transform: none;
        animation: none;
    }
}