:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent: #bb86fc;
    --accent-hover: #a370db;
    --container-width: 1000px;
    --border-radius: 12px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navigation */
nav {
    height: 80px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: -0.5px;
}

.links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 24px;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

/* Header */
header {
    padding: 100px 0 60px;
    text-align: center;
}

header h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    font-weight: 300;
}

.cta-group {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.btn {
    padding: 12px 28px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.btn-primary {
    background-color: #ffffff;
    color: #000000;
}

.btn-primary:hover {
    background-color: #e0e0e0;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Screenshots */
.screenshots {
    padding: 40px 0;
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    perspective: 1000px;
}

.screenshot-card {
    background: transparent;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.4s ease;
}

.screenshot-card img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--border-radius);
}

.screenshot-card:nth-child(even) {
    transform: translateY(20px);
}

/* Features */
.features {
    padding: 100px 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
}

.feature-item h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Vibe Check */
.vibe-check {
    padding: 60px 0 120px;
}

.vibe-card {
    background: linear-gradient(145deg, #1e1e1e, #121212);
    padding: 60px;
    border-radius: 24px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.vibe-card h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    font-style: italic;
    font-weight: 400;
}

.vibe-card p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Footer */
footer {
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    .screenshot-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .screenshot-card:nth-child(even) {
        transform: translateY(10px);
    }

    header h1 {
        font-size: 2.5rem;
    }

    .vibe-card {
        padding: 40px 20px;
    }
}