:root {
    --bg: #0a0a0b;
    --bg-card: #141416;
    --bg-hover: #1c1c20;
    --border: #27272a;
    --text: #fafafa;
    --text-muted: #a1a1aa;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --green: #22c55e;
    --yellow: #eab308;
    --purple: #a855f7;
    --radius: 12px;
    --max-w: 1100px;
}

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

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ── Nav ──────────────────────────────── */
nav {
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    background: rgba(10, 10, 11, 0.9);
    backdrop-filter: blur(12px);
    z-index: 50;
}
nav .container { display: flex; align-items: center; justify-content: space-between; }
nav .logo { font-size: 1.25rem; font-weight: 700; color: var(--text); }
nav .logo span { color: var(--accent); }
nav .links { display: flex; gap: 24px; align-items: center; }
nav .links a { color: var(--text-muted); font-size: 0.9rem; }
nav .links a:hover { color: var(--text); text-decoration: none; }

/* ── Hero ─────────────────────────────── */
.hero {
    text-align: center;
    padding: 100px 0 80px;
}
.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}
.hero h1 span { color: var(--accent); }
.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); text-decoration: none; }
.btn-secondary { background: var(--bg-card); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-hover); text-decoration: none; }

/* ── Code example ─────────────────────── */
.code-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 700px;
    margin: 50px auto 0;
    text-align: left;
    overflow-x: auto;
}
.code-block pre {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-muted);
}
.code-block .comment { color: #6b7280; }
.code-block .string { color: var(--green); }
.code-block .key { color: var(--accent); }

/* ── How it works ─────────────────────── */
.section { padding: 80px 0; }
.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}
.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 48px;
    font-size: 1.05rem;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
}
.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 16px;
}
.step-num.blue { background: rgba(59, 130, 246, 0.15); color: var(--accent); }
.step-num.green { background: rgba(34, 197, 94, 0.15); color: var(--green); }
.step-num.purple { background: rgba(168, 85, 247, 0.15); color: var(--purple); }
.step h3 { font-size: 1.15rem; margin-bottom: 8px; }
.step p { color: var(--text-muted); font-size: 0.9rem; }

/* ── Pricing ──────────────────────────── */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}
.plan {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    display: flex;
    flex-direction: column;
}
.plan.featured { border-color: var(--accent); position: relative; }
.plan.featured::before {
    content: "Popular";
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    padding: 2px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}
.plan-name { font-size: 1.1rem; font-weight: 600; margin-bottom: 4px; }
.plan-price { font-size: 2.2rem; font-weight: 800; margin-bottom: 4px; }
.plan-price span { font-size: 0.9rem; font-weight: 400; color: var(--text-muted); }
.plan-desc { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 24px; }
.plan-features { list-style: none; margin-bottom: 32px; flex: 1; }
.plan-features li {
    padding: 6px 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.plan-features li::before { content: "✓ "; color: var(--green); font-weight: 700; }

/* ── Register ─────────────────────────── */
.register-box {
    max-width: 480px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
}
.register-box h3 { font-size: 1.3rem; margin-bottom: 8px; }
.register-box p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 24px; }
.register-form { display: flex; gap: 12px; }
.register-form input {
    flex: 1;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
}
.register-form input:focus { border-color: var(--accent); }
.register-result {
    margin-top: 16px;
    padding: 16px;
    border-radius: 8px;
    font-family: monospace;
    font-size: 0.85rem;
    word-break: break-all;
    display: none;
}
.register-result.success { background: rgba(34, 197, 94, 0.1); border: 1px solid rgba(34, 197, 94, 0.3); color: var(--green); display: block; }
.register-result.error { background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.3); color: #ef4444; display: block; }

/* ── Footer ───────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ── Responsive ───────────────────────── */
@media (max-width: 640px) {
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }
    .register-form { flex-direction: column; }
}