:root {
    --bg-color: #050505;
    --text-color: #f5f5f5;
    --text-secondary: #888;
    --accent-color: #fff;
    --card-bg: #111;
    --card-border: #222;
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

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

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    margin-bottom: 4rem;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.03em;
}

/* Hero */
.hero {
    text-align: center;
    margin-bottom: 6rem;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
    color: #fff;
}

.gradient-text {
    background: linear-gradient(90deg, #30B0E8 0%, #8B5CF6 20%, #EC4899 45%, #F97316 75%, #FF6B35 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
    font-weight: 400;
}

.cta-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-bottom: 4rem;
}

.btn-primary {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: 1rem 2.5rem;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.version-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Visual Placeholder */
.hero-visual {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.window-frame {
    width: 600px;
    height: 380px;
    background: #000;
    border: 1px solid #333;
    border-radius: 12px;
    position: relative;
    box-shadow: 0 20px 80px rgba(255, 255, 255, 0.05);
    overflow: hidden;
}

.window-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40%;
    height: 60%;
    background: linear-gradient(45deg, #222, #111);
    border-radius: 8px;
    border: 1px solid #333;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 8rem;
}

@media (max-width: 900px) {
    .features {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 2rem;
    border-radius: 16px;
    transition: border-color 0.2s;
}

.feature-card:hover {
    border-color: #444;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

code {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
}

/* Privacy */
.privacy-statement {
    text-align: center;
    background: #0a0a0a;
    border: 1px solid #222;
    padding: 4rem 2rem;
    border-radius: 24px;
    margin-bottom: 6rem;
}

.privacy-statement h2 {
    font-size: 2rem;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

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

/* Footer */
footer {
    text-align: center;
    padding-bottom: 4rem;
    color: #444;
    font-size: 0.9rem;
}

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

    .window-frame {
        width: 100%;
        height: 250px;
    }
}