:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #151a2d;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-primary: #4facfe;
    --accent-secondary: #00f2fe;
    --gradient-main: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-gemini: linear-gradient(135deg, #4b90ff 0%, #ff5546 100%); /* Gemini-ish colors */
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --radius-md: 12px;
    --radius-lg: 24px;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

header {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 15, 25, 0.8);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-gemini);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 172, 254, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    background: var(--gradient-main);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(79, 172, 254, 0.3);
    color: #fff;
}

/* Sections */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.step-list {
    list-style: none;
    counter-reset: step-counter;
}

.step-list li {
    position: relative;
    padding-left: 50px;
    margin-bottom: var(--spacing-md);
}

.step-list li::before {
    counter-increment: step-counter;
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 32px;
    height: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--accent-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--accent-primary);
}

/* Code blocks */
pre {
    background: #000;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-top: var(--spacing-md);
    border: 1px solid var(--card-border);
}

code {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: #a5b3ce;
}

/* Footer */
footer {
    border-top: 1px solid var(--card-border);
    padding: var(--spacing-lg) 0;
    text-align: center;
    color: var(--text-secondary);
    margin-top: var(--spacing-xl);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}