:root {
    --primary: #FF6B6B;
    --primary-dark: #EE5A5A;
    --bg: #0F0F12;
    --surface: #1A1A1F;
    --surface-light: #25252C;
    --text: #F5F5F7;
    --text-secondary: #A0A0B0;
    --accent: #4ECDC4;
    --radius: 12px;
    --max-width: 1100px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(15, 15, 18, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero */
.hero {
    padding: 160px 0 120px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 0%, rgba(255,107,107,0.12) 0%, transparent 60%);
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin-bottom: 20px;
}

.subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 520px;
    margin: 0 auto 40px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255,107,107,0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(255,107,107,0.4);
}

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

.btn-secondary:hover {
    background: var(--surface-light);
    border-color: rgba(255,255,255,0.2);
}

.btn-large {
    padding: 16px 40px;
    font-size: 16px;
}

/* Sections */
section {
    padding: 100px 0;
}

section h2 {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.5px;
}

/* Features */
.features {
    background: var(--surface);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--bg);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    padding: 32px;
    transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,0.12);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* About */
.about p {
    text-align: center;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 24px;
    font-size: 16px;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 32px;
}

.tag {
    background: var(--surface);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    border: 1px solid rgba(255,255,255,0.08);
}

/* Download */
.download {
    background: var(--surface);
    text-align: center;
}

.download p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.download-btns {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.coming-soon {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Footer */
.footer {
    padding: 60px 0 32px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-brand .logo {
    margin-bottom: 4px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.copyright {
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    .hero {
        padding: 120px 0 80px;
    }
    section {
        padding: 64px 0;
    }
    section h2 {
        font-size: 28px;
        margin-bottom: 40px;
    }
    .nav {
        display: none;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}