/* Not Buk — shared styles
   Warm paper aesthetic, system fonts, responsive, dark-mode aware. */

:root {
  --paper: #f7f2e7;
  --paper-raised: #fffdf6;
  --ink: #2b2620;
  --ink-muted: #6f675b;
  --rule: rgba(90, 120, 160, 0.22);
  --margin-line: rgba(168, 70, 42, 0.45);
  --accent: #a8462a;
  --accent-contrast: #ffffff;
  --divider: rgba(43, 38, 32, 0.14);
  --shadow: rgba(43, 38, 32, 0.10);
  --rule-gap: 32px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1d1a15;
    --paper-raised: #26221c;
    --ink: #ece5d8;
    --ink-muted: #a89e8e;
    --rule: rgba(140, 165, 200, 0.16);
    --margin-line: rgba(214, 122, 92, 0.40);
    --accent: #d67a5c;
    --accent-contrast: #1d1a15;
    --divider: rgba(236, 229, 216, 0.14);
    --shadow: rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header / nav ---------- */

header.site-header {
  border-bottom: 1px solid var(--divider);
  background: var(--paper);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  flex-wrap: wrap;
  padding-top: 8px;
  padding-bottom: 8px;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.brand .brand-dot {
  color: var(--accent);
}

nav.site-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

nav.site-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

nav.site-nav a:hover,
nav.site-nav a[aria-current="page"] {
  color: var(--accent);
}

/* ---------- Hero ---------- */

.hero {
  text-align: center;
  padding: 72px 0 56px;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

.hero .tagline {
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  color: var(--ink-muted);
  max-width: 34em;
  margin: 0 auto 32px;
}

.appstore-badge {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 12px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.3;
  box-shadow: 0 4px 14px var(--shadow);
}

.appstore-badge:hover {
  opacity: 0.9;
}

.appstore-badge .small {
  display: block;
  font-size: 0.72rem;
  font-weight: 400;
  opacity: 0.8;
}

/* ---------- Paper card motif ---------- */

.page-card {
  position: relative;
  background: var(--paper-raised);
  background-image: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent calc(var(--rule-gap) - 1px),
    var(--rule) calc(var(--rule-gap) - 1px),
    var(--rule) var(--rule-gap)
  );
  border: 1px solid var(--divider);
  border-radius: 12px;
  box-shadow: 0 6px 18px var(--shadow);
  padding: 28px 28px 28px 56px;
  overflow: hidden;
}

.page-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 36px;
  width: 1.5px;
  background: var(--margin-line);
}

/* ---------- Feature grid ---------- */

.features {
  padding: 16px 0 64px;
}

.features h2,
.section-title {
  font-size: 1.7rem;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.feature {
  background: var(--paper-raised);
  border: 1px solid var(--divider);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 3px 10px var(--shadow);
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.feature p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.97rem;
}

.feature .glyph {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 10px;
}

/* ---------- Privacy callout ---------- */

.privacy-callout {
  margin: 24px 0 64px;
}

.privacy-callout h2 {
  margin-top: 0;
}

.privacy-callout p {
  color: var(--ink-muted);
}

.privacy-callout a {
  color: var(--accent);
}

/* ---------- Content pages (support / privacy) ---------- */

main.content {
  padding: 48px 0 64px;
}

main.content h1 {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

main.content .subtitle {
  color: var(--ink-muted);
  margin: 0 0 36px;
}

main.content h2 {
  font-size: 1.3rem;
  margin: 36px 0 12px;
}

main.content p,
main.content li {
  color: var(--ink);
}

main.content a {
  color: var(--accent);
}

.faq-item {
  margin-bottom: 12px;
}

details.faq-item {
  background: var(--paper-raised);
  border: 1px solid var(--divider);
  border-radius: 10px;
  padding: 14px 18px;
}

details.faq-item summary {
  cursor: pointer;
  font-weight: 600;
}

details.faq-item p {
  margin: 12px 0 4px;
  color: var(--ink-muted);
}

/* ---------- Footer ---------- */

footer.site-footer {
  border-top: 1px solid var(--divider);
  padding: 28px 0 40px;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.site-footer nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--ink-muted);
  text-decoration: none;
}

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

/* ---------- Small screens ---------- */

@media (max-width: 520px) {
  .hero {
    padding: 48px 0 40px;
  }

  .page-card {
    padding: 22px 20px 22px 44px;
  }

  .page-card::before {
    left: 28px;
  }

  .site-footer .wrap {
    flex-direction: column;
    align-items: flex-start;
  }
}