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

:root {
  --bg: #101010;
  --surface: #1a1a1a;
  --surface2: #222222;
  --text: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.45);
  --text-dim: rgba(255, 255, 255, 0.2);
  --radius: 20px;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: ui-rounded, -apple-system, "SF Pro Rounded", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── HERO ─── */
.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 100px 40px 80px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  margin-top: 24px;
}

.hero-sub {
  font-size: clamp(17px, 2.5vw, 22px);
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 48px;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  margin-bottom: 80px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  padding: 16px 28px;
  border-radius: 100px;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-primary svg {
  width: 18px;
  height: 18px;
}

.testflight-note {
  font-size: 13px;
  color: var(--text-muted);
}

.hero-image {
  display: flex;
  justify-content: center;
}

.hero-image img {
  width: 120px;
  height: auto;
  display: block;
  border-radius: 20px;
}

/* ─── SECTIONS ─── */
section {
  max-width: 800px;
  margin: 0 auto;
  padding: 100px 40px;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 48px;
}

/* ─── HOW IT WORKS ─── */
.steps {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.step {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 36px 40px;
  display: flex;
  gap: 28px;
  align-items: flex-start;
  transition: background 0.2s;
}

.step:hover {
  background: var(--surface2);
}

.step-number {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  min-width: 24px;
  padding-top: 3px;
  font-variant-numeric: tabular-nums;
}

.step-content h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.3px;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ─── ANTI-FEATURES ─── */
.anti-section {
  background: var(--surface);
  border-radius: 32px;
  padding: 64px;
  max-width: 800px;
  margin: 0 auto 100px;
}

.anti-section .section-label {
  margin-bottom: 24px;
}

.anti-section h2 {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.8px;
  margin-bottom: 48px;
  line-height: 1.2;
  color: var(--text-muted);
}

.anti-section h2 strong {
  color: var(--text);
}

.anti-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.anti-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text-muted);
}

.anti-list li::before {
  content: "x";
  font-size: 11px;
  font-weight: 700;
  color: var(--text-dim);
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 1px solid var(--text-dim);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── PRIVACY ─── */
.privacy-section {
  text-align: center;
  padding: 80px 40px;
  max-width: 600px;
}

.privacy-section h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.privacy-section p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ─── FOOTER ─── */
footer {
  padding: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo {
  width: 48px;
  height: 48px;
  display: block;
}

.footer-right {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.footer-link {
  color: var(--text);
  text-decoration: none;
}

.footer-link:hover {
  text-decoration: underline;
}

/* ─── FADE IN ─── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── RESPONSIVE ─── */
@media (max-width: 600px) {
  .hero {
    padding: 72px 24px 60px;
  }

  section {
    padding: 72px 24px;
  }

  .anti-section {
    padding: 40px 28px;
    margin: 0 24px 80px;
  }

  .anti-list {
    grid-template-columns: 1fr;
  }

  .step {
    padding: 28px 24px;
  }

  footer {
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
  }
}