:root {
    --bg-color: #050505;
    --card-bg: #0a0a0a;
    --card-hover: #0f0f0f;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --accent-blue: #0071e3;
    --accent-blue-hover: #0077ed;
    --accent-glow: rgba(0, 113, 227, 0.2);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --transition-snappy: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-smooth: 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    --transition-hover: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at 50% 0%, rgba(88, 166, 255, 0.08) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    overflow-x: hidden;
    letter-spacing: -0.01em;
}

.wrapper {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: opacity var(--transition-snappy);
}

.logo:hover {
    opacity: 0.8;
}

.logo img {
    width: 24px;
    height: 24px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-snappy);
}

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

.btn-github {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary) !important;
    font-size: 0.9rem !important;
    transition: all var(--transition-snappy) !important;
}

.btn-github:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-secondary);
}

/* Hero */
.hero {
    text-align: center;
    padding: 4vh 0;
    min-height: calc(100vh - 80px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
    line-height: 1.1;
    background: linear-gradient(to bottom, #ffffff, #e0e6ed);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-wrap: balance;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0 auto 2rem;
    font-weight: 400;
    text-wrap: balance;
}

.badge {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: inline-block;
    border: 1px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all var(--transition-snappy);
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-color);
}

.btn-primary:hover {
    background: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

.preview-container {
    margin-top: 2rem;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: #000;
    max-width: 900px;
    width: 100%;
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.preview-container:hover {
    transform: scale(1.01);
}

.preview-container img {
    width: 100%;
    display: block;
    opacity: 0.95;
}

/* Features */
.features {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
    text-wrap: balance;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    text-wrap: balance;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
    transition: transform var(--transition-hover), border-color var(--transition-hover), background var(--transition-hover);
}

.feature-card:hover {
    transform: translateY(-6px) !important;
    border-color: var(--border-hover);
    background: var(--card-hover);
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-wrap: balance;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Workflow */
.usage {
    padding: 6rem 0;
    border-top: 1px solid var(--border-color);
}

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

.step {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform var(--transition-hover), border-color var(--transition-hover);
}

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

.step-number {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 700;
    font-family: var(--font-mono);
    opacity: 0.5;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-wrap: balance;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.step-content code {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    color: var(--text-primary);
    font-size: 0.85em;
}

/* Footer */
footer {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

/* Animations */
.hidden-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
    will-change: opacity, transform;
}

.show-section {
    opacity: 1;
    transform: translateY(0);
}

/* Utilities */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    nav {
        padding: 1.5rem 0;
    }

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

    .hero {
        padding: 6rem 0 4rem;
    }

    .feature-grid,
    .usage-steps {
        grid-template-columns: 1fr;
    }
}