/* Lingo website: colors follow the app's "Paper" (light) and "Ink" (dark) themes. */
:root {
  --bg: #F7F3EC;
  --bg-2: #F1EBE1;
  --surface: #FFFDF9;
  --text: #1D1B18;
  --muted: #5E584F;
  --accent: #B4452C;
  --line: rgba(29, 27, 24, 0.12);
  --serif: ui-serif, "New York", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 18px;
  --max: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141517;
    --bg-2: #0D0E10;
    --surface: #1C1D20;
    --text: #F4F1EA;
    --muted: #A9A59C;
    --accent: #E8B55B;
    --line: rgba(244, 241, 234, 0.14);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 8px;
}
.skip:focus { left: 16px; top: 16px; z-index: 10; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 68px; flex-wrap: wrap;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--text); text-decoration: none; font: 600 20px/1 var(--serif);
}
.brand img { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line); }
.nav { display: flex; gap: 20px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 15px; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

/* Hero */
.hero { padding: 72px 0 56px; }
.hero .wrap {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center;
}
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--muted); margin: 0 0 14px;
}
h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.12; margin: 0; }
h1 { font-size: clamp(40px, 7vw, 68px); letter-spacing: -0.01em; }
.lead { font-size: 20px; color: var(--muted); margin: 20px 0 28px; max-width: 34ch; }

.badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 20px; border-radius: 999px;
  background: var(--text); color: var(--bg);
  font-weight: 600; font-size: 15px; text-decoration: none;
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.note { font-size: 14px; color: var(--muted); margin-top: 12px; }

/* Phone mock-up (pure CSS, mirrors the app's word card) */
.phone {
  justify-self: center;
  width: min(300px, 80vw); aspect-ratio: 9 / 19.5;
  border-radius: 44px; padding: 12px;
  background: #111; box-shadow: 0 0 0 1px var(--line), 0 30px 60px -20px rgba(0,0,0,0.35);
}
.screen {
  position: relative; height: 100%; border-radius: 34px; overflow: hidden;
  background: linear-gradient(#F7F3EC, #F1EBE1); color: #1D1B18;
  padding: 64px 22px 24px; display: flex; flex-direction: column; justify-content: center;
}
.screen .gear {
  position: absolute; top: 18px; right: 16px; width: 30px; height: 30px; border-radius: 50%;
  background: rgba(29,27,24,0.07); display: grid; place-items: center; font-size: 15px; color: #1D1B18;
}
.screen .age {
  align-self: flex-start; font-size: 11px; font-weight: 500; color: #5E584F;
  background: rgba(29,27,24,0.07); padding: 3px 8px; border-radius: 999px;
}
.screen .term { font: 400 46px/1.05 var(--serif); margin: 10px 0 4px; }
.screen .ipa { font-size: 13px; color: #5E584F; }
.screen .def { font: 400 16px/1.45 var(--serif); margin-top: 20px; max-width: 80%; }
.screen .rail {
  position: absolute; right: 12px; bottom: 58px; display: grid; gap: 10px;
}
.screen .rail span {
  width: 30px; height: 30px; border-radius: 50%; background: rgba(29,27,24,0.07);
  display: grid; place-items: center; font-size: 13px;
}
.screen .chev { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); color: #8a8378; font-size: 14px; }

/* Sections */
section { padding: 56px 0; }
.section-title { font-size: clamp(28px, 4vw, 38px); margin-bottom: 12px; }
.section-intro { color: var(--muted); max-width: 60ch; margin: 0 0 32px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px;
}
.card h3 { font-size: 22px; margin-bottom: 8px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.card .icon { font-size: 22px; color: var(--accent); margin-bottom: 12px; display: block; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.cta {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px; display: flex; gap: 20px; align-items: center; justify-content: space-between; flex-wrap: wrap;
}
.cta p { margin: 6px 0 0; color: var(--muted); }
.button {
  display: inline-block; padding: 12px 20px; border-radius: 999px;
  border: 1px solid var(--text); color: var(--text); text-decoration: none; font-weight: 600; font-size: 15px;
}
.button:hover { background: var(--text); color: var(--bg); }

/* Legal / document pages */
.doc { padding: 56px 0 80px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(36px, 6vw, 52px); margin-bottom: 8px; }
.doc .meta { color: var(--muted); font-size: 15px; margin: 0 0 32px; }
.doc h2 { font-size: 26px; margin: 44px 0 12px; }
.doc h3 { font-size: 20px; margin: 28px 0 8px; }
.doc p, .doc li { color: var(--text); }
.doc ul { padding-left: 1.2em; }
.doc li { margin: 6px 0; }
.summary {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 24px; margin: 0 0 8px;
}
.summary ul { margin: 8px 0 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; }

details {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 20px; margin: 10px 0;
}
summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 0; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0 48px; margin-top: 24px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--muted); }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

@media (max-width: 860px) {
  .hero { padding: 44px 0 32px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  .grid { grid-template-columns: 1fr; }
  .nav { gap: 14px; }
  .cta { padding: 24px; }
}
@media (prefers-reduced-motion: no-preference) {
  .button, .badge { transition: background 0.15s, color 0.15s; }
}

/* App screenshots in device frames */
.shot { display: block; height: auto; max-width: 100%; filter: drop-shadow(0 24px 40px rgba(0,0,0,0.22)); }
.shot-hero { justify-self: center; width: min(300px, 78vw); }
.gallery {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px;
}
.gallery figure { margin: 0; text-align: center; }
.gallery .shot { width: 100%; max-width: 260px; margin: 0 auto 14px; }
.gallery figcaption { font-size: 15px; color: var(--muted); }
@media (max-width: 860px) {
  .gallery {
    grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 62%;
    overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 12px;
    -webkit-overflow-scrolling: touch;
  }
  .gallery figure { scroll-snap-align: center; }
}

/* Sources page: search box, letter jump and word list */
.doc-wide .wrap { max-width: 900px; }

.srch { margin: 28px 0 8px; position: sticky; top: 0; z-index: 5; background: var(--bg); padding: 12px 0; }
.srch-label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.srch input {
  width: 100%; font: inherit; color: var(--text);
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 16px; -webkit-appearance: none; appearance: none;
}
.srch input::placeholder { color: var(--muted); }
.srch input:focus-visible { border-color: var(--accent); }
.srch-count { font-size: 14px; color: var(--muted); margin: 8px 0 0; min-height: 1.4em; }

.srch-jump { display: flex; flex-wrap: wrap; gap: 4px 10px; margin: 4px 0 28px; font-size: 14px; }
.srch-jump a { color: var(--muted); text-decoration: none; font-weight: 600; }
.srch-jump a:hover { color: var(--accent); }

.words-group { padding: 0; margin: 0 0 36px; scroll-margin-top: 150px; }
.words-letter {
  font-size: 15px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  font-family: var(--sans); color: var(--muted);
  margin: 0 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--line);
}
.words-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.word {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 20px; margin: 0;
}
.word-head { margin: 0; }
.word-term { font: 500 21px/1.2 var(--serif); }
.word-ipa { font-size: 14px; color: var(--muted); margin-left: 8px; white-space: nowrap; }
.word-topics { margin: 4px 0 0; font-size: 13px; color: var(--muted); }
.word-sources { margin: 10px 0 0; font-size: 15px; word-break: break-word; }
.word-nosource { color: var(--muted); font-style: italic; }
.word-note { margin: 8px 0 0; font-size: 14px; line-height: 1.5; color: var(--muted); }
.words-empty { color: var(--muted); }

@media (max-width: 560px) {
  .word { padding: 14px 16px; }
  .word-ipa { display: block; margin: 2px 0 0; }
}
a.badge:hover { opacity: 0.85; }