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

:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --border: #1f1f1f;
  --text: #e8e8e8;
  --muted: #666666;
  --accent: #ffffff;
  --green: #30d158;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Nav ────────────────────────────────────────────────────────────────── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
}

.nav-logo {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 13px;
  color: var(--muted);
  transition: color 0.2s;
}

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

/* ── Sections ───────────────────────────────────────────────────────────── */
section {
  max-width: 960px;
  margin: 0 auto;
  padding: 80px 40px;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding-top: 100px;
  padding-bottom: 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 12px;
  margin-bottom: 28px;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.hero-badge span { color: var(--green); font-size: 8px; }

h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.08;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: clamp(16px, 2.5vw, 20px);
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.5;
  letter-spacing: -0.2px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #000;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 28px;
  border-radius: 100px;
  transition: opacity 0.2s, transform 0.15s;
  letter-spacing: -0.2px;
}

.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  padding: 13px 24px;
  border-radius: 100px;
  border: 1px solid var(--border);
  transition: color 0.2s, border-color 0.2s, transform 0.15s;
  letter-spacing: -0.2px;
}

.btn-secondary:hover {
  color: var(--text);
  border-color: #444;
  transform: translateY(-1px);
}

.hero-meta {
  margin-top: 28px;
  font-size: 12px;
  color: var(--muted);
}

/* ── Section heading ────────────────────────────────────────────────────── */
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

h2 {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--accent);
  line-height: 1.15;
  margin-bottom: 56px;
}

/* ── How it works ───────────────────────────────────────────────────────── */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.step {
  background: var(--surface);
  padding: 36px 28px;
  position: relative;
}

.step:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.step:last-child  { border-radius: 0 var(--radius) var(--radius) 0; }

.step-num {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--muted);
  margin-bottom: 16px;
}

.step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
  letter-spacing: -0.3px;
}

.step p { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* ── Features ───────────────────────────────────────────────────────────── */
.features { padding-top: 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.feature-card {
  background: var(--surface);
  padding: 28px;
  border-radius: 0;
  transition: background 0.2s;
}

/* rounded corners for grid corners */
.feature-card:nth-child(1) { border-radius: var(--radius) 0 0 0; }
.feature-card:nth-child(3) { border-radius: 0 var(--radius) 0 0; }
.feature-card:nth-child(4) { border-radius: 0 0 0 var(--radius); }
.feature-card:nth-child(6) { border-radius: 0 0 var(--radius) 0; }

.feature-card:hover { background: #161616; }

.feature-icon {
  width: 32px;
  height: 32px;
  line-height: 0;
  margin-bottom: 16px;
  display: block;
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.feature-card p { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ── Requirements ───────────────────────────────────────────────────────── */
.req-section { border-top: 1px solid var(--border); padding-top: 60px; padding-bottom: 60px; }

.req-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.req-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--muted);
}

.req-list li::before {
  content: "✓";
  color: var(--green);
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 100%;
}

.footer-left { font-size: 13px; color: var(--muted); }
.footer-right { font-size: 13px; color: var(--muted); }
.footer-right a { color: var(--muted); transition: color 0.2s; }
.footer-right a:hover { color: var(--text); }

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 720px) {
  nav { padding: 16px 20px; }
  .nav-links { display: none; }

  section { padding: 60px 20px; }
  .hero { padding-top: 64px; }

  .steps { grid-template-columns: 1fr; gap: 2px; }
  .step:first-child { border-radius: var(--radius) var(--radius) 0 0; }
  .step:last-child  { border-radius: 0 0 var(--radius) var(--radius); }

  .feature-grid { grid-template-columns: 1fr; gap: 2px; }
  .feature-card:nth-child(n) { border-radius: 0; }
  .feature-card:first-child  { border-radius: var(--radius) var(--radius) 0 0; }
  .feature-card:last-child   { border-radius: 0 0 var(--radius) var(--radius); }

  footer { flex-direction: column; gap: 8px; text-align: center; padding: 24px 20px; }
}