:root {
  --bg-light: #f5f5f7;
  --bg-dark: #0b1220;
  --surface-light: #ffffff;
  --surface-dark: #1e293b;
  --text-light: #1d1d1f;
  --text-dark: #f8fafc;
  --muted-light: rgba(0, 0, 0, 0.64);
  --muted-dark: rgba(248, 250, 252, 0.72);
  --accent: #2dd4bf;
  --accent-deep: #0d9488;
  --accent-soft: rgba(45, 212, 191, 0.14);
  --hero-from: #0f172a;
  --hero-to: #132a3e;
  --border-light: rgba(0, 0, 0, 0.06);
  --border-dark: rgba(255, 255, 255, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}

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

img {
  display: block;
  max-width: 100%;
}

/* ── Nav ── */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(24px, calc((100% - 980px) / 2));
  height: 52px;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 600;
  font-size: 15px;
}

.nav-brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

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

.nav-links a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #fff;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 980px;
  background: var(--accent);
  color: #0b1220 !important;
  font-size: 12px;
  font-weight: 600;
}

.nav-cta:hover {
  filter: brightness(1.06);
}

@media (max-width: 640px) {
  .nav-links li:not(:last-child) {
    display: none;
  }
}

/* ── Hero ── */

.hero {
  background: linear-gradient(165deg, var(--hero-from) 0%, var(--hero-to) 55%, #0b1220 100%);
  color: #fff;
  padding: 72px 24px 96px;
  text-align: center;
  overflow: hidden;
  position: relative;
}

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(45, 212, 191, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 80% 70%, rgba(45, 212, 191, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.hero-logo {
  width: 96px;
  height: 96px;
  margin: 0 auto 28px;
  border-radius: 22px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.hero-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero h1 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", sans-serif;
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 600;
  line-height: 1.07;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.47;
  max-width: 520px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.15s, filter 0.15s;
}

.btn:hover {
  transform: scale(1.02);
}

.btn-primary {
  background: var(--accent);
  color: #0b1220;
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* ── Sections ── */

.section {
  padding: 80px 24px;
}

.section-light {
  background: var(--bg-light);
  color: var(--text-light);
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-dark);
}

.container {
  max-width: 980px;
  margin: 0 auto;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-head h2 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", sans-serif;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-head p {
  font-size: 17px;
  color: var(--muted-light);
  max-width: 560px;
  margin: 0 auto;
}

.section-dark .section-head p {
  color: var(--muted-dark);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--surface-light);
  border-radius: 20px;
  padding: 28px 24px;
  border: 1px solid var(--border-light);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.feature-card p {
  font-size: 14px;
  color: var(--muted-light);
  line-height: 1.5;
}

.privacy-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.12), rgba(45, 212, 191, 0.04));
  border: 1px solid rgba(45, 212, 191, 0.22);
  border-radius: 24px;
  padding: 36px 32px;
}

.privacy-banner h3 {
  font-size: 21px;
  font-weight: 600;
  margin-bottom: 8px;
}

.privacy-banner p {
  font-size: 15px;
  color: var(--muted-dark);
  max-width: 520px;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.pill {
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 980px;
  background: rgba(45, 212, 191, 0.15);
  color: var(--accent);
}

/* ── Support ── */

.support-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 40px;
  max-width: 560px;
  margin: 0 auto;
  padding: 36px 32px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(45, 212, 191, 0.22);
  border-radius: 24px;
}

.support-qr {
  width: 240px;
  height: 240px;
  border-radius: 16px;
  background: #fff;
  padding: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.24);
}

.support-note {
  flex: 1;
  min-width: 200px;
  text-align: center;
}

.support-title {
  font-size: 21px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.support-note p {
  font-size: 15px;
  color: var(--muted-dark);
  margin-bottom: 8px;
}

.section-light .support-card {
  background: var(--surface-light);
  border-color: var(--border-light);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.section-light .support-title {
  color: var(--text-light);
}

.section-light .support-note p {
  color: var(--muted-light);
}

.support-disclaimer {
  font-size: 12px !important;
  opacity: 0.72;
  margin-top: 12px !important;
}

.contact-actions {
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-email {
  color: #0b1220;
}

/* ── Footer ── */

.site-footer {
  background: #000;
  color: rgba(255, 255, 255, 0.64);
  padding: 48px 24px 32px;
  font-size: 12px;
}

.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand {
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

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

.footer-copy {
  max-width: 980px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

/* ── Legal page ── */

.legal-page {
  background: var(--bg-light);
  color: var(--text-light);
  min-height: 100vh;
}

@media (prefers-color-scheme: dark) {
  .legal-page {
    background: var(--bg-dark);
    color: var(--text-dark);
  }

  .section-light {
    background: var(--bg-dark);
    color: var(--text-dark);
  }

  .feature-card {
    background: var(--surface-dark);
    border-color: var(--border-dark);
  }

  .feature-card p {
    color: var(--muted-dark);
  }

  .section-head p {
    color: var(--muted-dark);
  }

  .section-light .support-card {
    background: var(--surface-dark);
    border-color: var(--border-dark);
  }

  .section-light .support-title {
    color: var(--text-dark);
  }

  .section-light .support-note p {
    color: var(--muted-dark);
  }
}

.legal-wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.legal-wrap .badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-deep);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 980px;
  margin-bottom: 12px;
}

@media (prefers-color-scheme: dark) {
  .legal-wrap .badge {
    color: var(--accent);
  }
}

.legal-wrap h1 {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.legal-wrap .subtitle {
  color: var(--muted-light);
  font-size: 15px;
}

@media (prefers-color-scheme: dark) {
  .legal-wrap .subtitle {
    color: var(--muted-dark);
  }
}

.legal-wrap .updated {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted-light);
}

@media (prefers-color-scheme: dark) {
  .legal-wrap .updated {
    color: var(--muted-dark);
  }
}

.legal-card {
  background: var(--surface-light);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;
  border: 1px solid var(--border-light);
}

@media (prefers-color-scheme: dark) {
  .legal-card {
    background: var(--surface-dark);
    border-color: var(--border-dark);
  }
}

.legal-card h2 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.legal-card p {
  font-size: 15px;
  color: var(--muted-light);
  margin-bottom: 12px;
}

@media (prefers-color-scheme: dark) {
  .legal-card p {
    color: var(--muted-dark);
  }
}

.legal-card p:last-child {
  margin-bottom: 0;
}

.legal-card ul {
  margin: 0 0 12px 1.1em;
}

.legal-card li {
  font-size: 15px;
  color: var(--muted-light);
  margin-bottom: 8px;
}

@media (prefers-color-scheme: dark) {
  .legal-card li {
    color: var(--muted-dark);
  }
}

.legal-card li strong {
  color: inherit;
  font-weight: 600;
}

.legal-card table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin-top: 8px;
}

.legal-card th,
.legal-card td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: top;
}

@media (prefers-color-scheme: dark) {
  .legal-card th,
  .legal-card td {
    border-color: var(--border-dark);
  }
}

.legal-card th {
  font-weight: 600;
  width: 28%;
}

.legal-card td {
  color: var(--muted-light);
}

@media (prefers-color-scheme: dark) {
  .legal-card td {
    color: var(--muted-dark);
  }
}

.legal-card a {
  color: var(--accent-deep);
}

@media (prefers-color-scheme: dark) {
  .legal-card a {
    color: var(--accent);
  }
}

.highlight {
  font-weight: 600;
}