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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: #f9f9f9;
  color: #111;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── Header ─────────────────────────────── */

header {
  background: #0a0a0a;
  border-bottom: 1px solid #1f1f1f;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  gap: 36px;
}

.app-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
  padding: 20px 0;
  flex-shrink: 0;
}

.app-name .green {
  color: #39FF14;
}

nav.tabs {
  display: flex;
}

a.tab {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: #777;
  padding: 20px 18px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

a.tab:hover {
  color: #fff;
}

a.tab.active {
  color: #39FF14;
  border-bottom-color: #39FF14;
}

/* ─── Hero ────────────────────────────────── */

.hero {
  background: #0a0a0a;
  color: #ffffff;
  padding: 72px 40px 64px;
}

.hero-inner {
  max-width: 760px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #39FF14;
  margin-bottom: 20px;
}

.hero-eyebrow::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: #39FF14;
  border-radius: 2px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
  color: #ffffff;
}

.hero p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.55);
  max-width: 500px;
  line-height: 1.7;
}

/* ─── Page wrapper ────────────────────────── */

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 40px 100px;
}

/* ─── Section ─────────────────────────────── */

.section {
  padding: 60px 0;
  border-bottom: 1px solid #e5e5e5;
}

.section:last-child {
  border-bottom: none;
}

.section-eyebrow {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #39FF14;
  background: #0a0a0a;
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.section > h2 {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #0a0a0a;
  margin-bottom: 12px;
  line-height: 1.2;
}

.section > p {
  font-size: 1rem;
  color: #555;
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 600px;
}

/* ─── Steps ───────────────────────────────── */

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid #e5e5e5;
  border-radius: 14px;
  overflow: hidden;
  margin-top: 32px;
}

.step {
  display: flex;
  gap: 0;
  align-items: stretch;
  border-bottom: 1px solid #e5e5e5;
  background: #fff;
}

.step:last-child {
  border-bottom: none;
}

.step-num {
  flex-shrink: 0;
  width: 64px;
  background: #0a0a0a;
  color: #39FF14;
  font-size: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.02em;
}

.step-body {
  padding: 24px 28px;
}

.step-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #0a0a0a;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.step-body p {
  font-size: 0.93rem;
  color: #555;
  line-height: 1.65;
  margin: 0;
}

/* ─── FAQ ─────────────────────────────────── */

.faq {
  display: flex;
  flex-direction: column;
  border: 1px solid #e5e5e5;
  border-radius: 14px;
  overflow: hidden;
  margin-top: 32px;
  background: #fff;
}

.faq-item {
  padding: 26px 32px;
  border-bottom: 1px solid #f0f0f0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 0.97rem;
  font-weight: 700;
  color: #0a0a0a;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.faq-item p {
  font-size: 0.92rem;
  color: #555;
  line-height: 1.7;
  margin: 0;
}

/* ─── Troubleshooting ─────────────────────── */

.trouble-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 32px;
}

.trouble-item {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 12px;
  padding: 24px 28px;
  border-left: 4px solid #0a0a0a;
}

.trouble-item h3 {
  font-size: 0.97rem;
  font-weight: 700;
  color: #0a0a0a;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.trouble-item p {
  font-size: 0.92rem;
  color: #555;
  line-height: 1.7;
  margin: 0;
}

/* ─── Contact card ────────────────────────── */

.contact-card {
  background: #0a0a0a;
  border-radius: 16px;
  padding: 44px 40px;
  color: #fff;
  margin-top: 32px;
}

.contact-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.contact-card p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 440px;
}

.contact-card a.email-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #39FF14;
  color: #0a0a0a;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.93rem;
  padding: 14px 26px;
  border-radius: 10px;
  letter-spacing: -0.01em;
  transition: opacity 0.15s;
}

.contact-card a.email-btn:hover {
  opacity: 0.85;
}

/* ─── Privacy: no-collect grid ────────────── */

.no-collect-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 28px;
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 14px;
  padding: 28px 28px;
}

.no-collect-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: #444;
  padding: 8px 0;
}

.no-collect-item::before {
  content: '';
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #39FF14;
  outline: 2px solid #0a0a0a;
  outline-offset: 1px;
}

/* ─── Privacy: bullet list ────────────────── */

.policy-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 28px;
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 14px;
  padding: 28px 32px;
}

.policy-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  font-size: 0.93rem;
  color: #555;
  line-height: 1.65;
}

.policy-list li::before {
  content: '';
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #39FF14;
  outline: 2px solid #0a0a0a;
  outline-offset: 1px;
  margin-top: 7px;
}

/* ─── Highlight box ───────────────────────── */

.highlight-box {
  background: #0a0a0a;
  color: #fff;
  border-radius: 14px;
  padding: 36px 36px;
  margin-top: 28px;
}

.highlight-box p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 1rem;
  line-height: 1.75;
  margin: 0;
}

.highlight-box strong {
  color: #39FF14;
  font-weight: 700;
}

/* ─── Inline note ─────────────────────────── */

.note {
  font-size: 0.83rem !important;
  color: #999 !important;
  margin-top: 16px !important;
}

/* ─── Footer ──────────────────────────────── */

footer {
  background: #0a0a0a;
  border-top: 1px solid #1f1f1f;
  padding: 36px 40px;
}

.footer-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-brand {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

.footer-brand .green {
  color: #39FF14;
}

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

.footer-links a {
  font-size: 0.8rem;
  color: #555;
  text-decoration: none;
  transition: color 0.15s;
}

.footer-links a:hover {
  color: #999;
}

.footer-copy {
  font-size: 0.78rem;
  color: #333;
}

/* ─── Responsive ──────────────────────────── */

@media (max-width: 680px) {
  .hero {
    padding: 52px 24px 44px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .header-inner,
  .page {
    padding-left: 24px;
    padding-right: 24px;
  }

  .hero-inner {
    padding: 0;
  }

  .no-collect-grid {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 32px 26px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding-left: 24px;
    padding-right: 24px;
  }
}