/* Fold Landing · Nocturne Theme */
:root {
  --bg: #0a0e1f;
  --panel: #0f1530;
  --surface: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.14);
  --fg: #eef1f7;
  --muted: #9aa3c0;
  --faint: #6b7398;
  --accent: #e9b770;
  --accent-soft: rgba(233, 183, 112, 0.17);
  --emo-anx: #3b5bdb;
  --emo-ang: #9b2c2c;
  --emo-tired: #6b7280;
  --emo-sad: #7c6f9c;
  --emo-stress: #1f5d4c;
  --emo-lonely: #34408c;
  --font-display: "Iowan Old Style", Charter, Georgia, "Songti SC", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: radial-gradient(120% 70% at 50% 0%, #1b2452 0%, #101635 48%, #0a0e1f 100%);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(80% 35% at 80% 0%, rgba(233, 183, 112, 0.08), transparent 60%),
    radial-gradient(65% 42% at 8% 18%, rgba(124, 111, 156, 0.18), transparent 55%);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--fg);
}

h1 {
  font-size: clamp(30px, 6vw, 48px);
  line-height: 1.12;
}

h2 {
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.18;
}

h3 {
  font-size: 18px;
}

p, .fine {
  color: var(--muted);
  line-height: 1.65;
}

.fine {
  font-size: 13px;
  color: var(--faint);
}

.container {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 22px;
}

/* Hero */
.hero {
  padding: clamp(60px, 12vh, 120px) 0 clamp(30px, 6vh, 60px);
  text-align: center;
}

.hero-mark {
  width: clamp(72px, 12vw, 100px);
  height: clamp(72px, 12vw, 100px);
  border-radius: 50%;
  background: radial-gradient(circle at 36% 34%, #fff5df, var(--accent) 56%, #a77638);
  box-shadow: 0 0 80px rgba(233, 183, 112, 0.4);
  display: grid;
  place-items: center;
  color: #5a3b15;
  font: 600 clamp(32px, 5vw, 48px) var(--font-display);
  margin: 0 auto 28px;
}

.hero-mark::after {
  content: "F";
}

.hero .kicker {
  color: var(--accent);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 8px;
}

.hero h1 {
  margin-bottom: 16px;
}

.hero .sub {
  color: var(--muted);
  font-size: clamp(15px, 2.5vw, 18px);
  max-width: 28em;
  margin: 0 auto 32px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 28px;
  border-radius: 999px;
  border: 0;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(180deg, #f2cc8f, var(--accent));
  color: #34240e;
  box-shadow: 0 16px 36px rgba(233, 183, 112, 0.24);
  font-weight: 800;
}

.btn-secondary {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--fg);
}

/* Sections */
.section {
  padding: clamp(40px, 8vh, 80px) 0;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header .kicker {
  color: var(--accent);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  backdrop-filter: blur(10px);
}

.feature-card .icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.feature-card .icon.anx { background: rgba(59, 91, 219, 0.2); color: var(--emo-anx); }
.feature-card .icon.peach { background: rgba(233, 183, 112, 0.2); color: var(--accent); }
.feature-card .icon.purple { background: rgba(124, 111, 156, 0.2); color: var(--emo-sad); }
.feature-card .icon.green { background: rgba(31, 93, 76, 0.2); color: var(--emo-stress); }

.feature-card h3 {
  margin-bottom: 8px;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
}

/* Privacy banner */
.privacy-banner {
  background: var(--panel);
  border: 1px solid rgba(233, 183, 112, 0.25);
  border-radius: 12px;
  padding: clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
}

.privacy-banner .lock {
  font-size: 40px;
  line-height: 1;
  color: var(--accent);
}

.privacy-banner h3 {
  margin-bottom: 8px;
}

.privacy-banner p {
  margin: 0;
  font-size: 14px;
}

.privacy-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.privacy-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--muted);
  list-style: none;
}

.privacy-list .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 7px;
  flex: none;
  opacity: 0.6;
}

/* Download section */
.download-section {
  text-align: center;
  padding-bottom: clamp(50px, 10vh, 100px);
}

.download-section .cta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: clamp(24px, 4vw, 40px);
  display: inline-block;
  min-width: min(100%, 400px);
}

.version {
  color: var(--faint);
  font-size: 12px;
  margin-bottom: 20px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 22px;
  text-align: center;
}

.footer .links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.footer a {
  color: var(--faint);
  text-decoration: none;
  font-size: 13px;
}

.footer a:hover {
  color: var(--muted);
}

.footer .copy {
  color: var(--faint);
  font-size: 12px;
}

/* Responsive */
@media (max-width: 640px) {
  .privacy-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 40px 0 30px;
  }

  .hero .actions {
    flex-direction: column;
    align-items: center;
  }

  .hero .actions .btn {
    width: 100%;
    max-width: 320px;
  }
}