:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --bg: #0a0a0b;
    --bg-card: #131316;
    --bg-elevated: #1a1a1f;
    --text: #ffffff;
    --text-muted: #a1a1aa;
    --text-dim: #71717a;
    --border: #27272a;
    --gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #d946ef);
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    color: var(--primary);
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--text);
}

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-elevated);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.github-link:hover {
    background: var(--bg-card);
    border-color: var(--text-dim);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--text-dim);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.hero-note {
    font-size: 0.875rem;
    color: var(--text-dim);
}

/* App Preview */
.hero-visual {
    display: flex;
    justify-content: center;
}

.app-preview {
    width: 100%;
    max-width: 500px;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
}

.preview-dots {
    display: flex;
    gap: 6px;
}

.preview-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border);
}

.preview-dots span:first-child { background: #ff5f57; }
.preview-dots span:nth-child(2) { background: #febc2e; }
.preview-dots span:last-child { background: #28c840; }

.preview-url {
    flex: 1;
    padding: 0.5rem 1rem;
    background: var(--bg);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.preview-content {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
}

.preview-recording {
    text-align: center;
}

.rec-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.5);
    border-radius: 20px;
    color: #ef4444;
    font-size: 0.875rem;
    font-weight: 600;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.rec-time {
    margin-top: 1rem;
    font-size: 2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.features h2,
.formats h2,
.download h2,
.cta h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Formats Section */
.formats {
    padding: 6rem 2rem;
    background: var(--bg-card);
}

.formats-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 3rem;
}

.platforms {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: 2rem;
}

.platform-group h4 {
    font-size: 0.875rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.platform-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.platform-tags span {
    padding: 0.5rem 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.2s;
}

.platform-tags span:hover {
    border-color: var(--primary);
    color: var(--text);
}

/* Download Section */
.download {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.download-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 3rem;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
}

.os-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.download-card p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.btn-download {
    display: block;
    padding: 0.875rem 1.5rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-download:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.linux-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-download-alt {
    display: block;
    padding: 0.75rem 1rem;
    background: var(--bg-elevated);
    color: var(--text);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.btn-download-alt:hover {
    border-color: var(--primary);
}

.download-note {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.download-note a {
    color: var(--primary-light);
    text-decoration: none;
}

.download-note a:hover {
    text-decoration: underline;
}

/* CTA Section */
.cta {
    padding: 6rem 2rem;
    text-align: center;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-card) 100%);
}

.cta p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-size: 1.125rem;
}

/* Footer */
footer {
    padding: 4rem 2rem;
    border-top: 1px solid var(--border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.footer-content > p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--text);
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-dim);
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 6rem;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        margin: 0 auto 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a:not(.github-link) {
        display: none;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .download-cards {
        grid-template-columns: 1fr;
    }
}

/* File size labels */
.file-size {
    display: block;
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.7;
    margin-top: 0.25rem;
}

.btn-download,
.btn-download-alt {
    display: flex;
    flex-direction: column;
    align-items: center;
}