/* Vivavoce site. Tokens match the app's design system (VVTokens.swift). */
:root {
  --paper: #F7F3EA;
  --card: #FFFDF8;
  --sunk: #EFE9DC;
  --rule: #E2DACA;
  --ink: #1D1B17;
  --ink-2: #5E584D;
  --accent: #2D4BF0;
  --accent-fill: #2D4BF0;
  --accent-wash: #E4E8FD;
  --success: #2F7D4F;
  --mistake: #A04B10;
  --mistake-wash: #F8E9DC;
  --highlight: #F7E27A;
  --shadow: 0 1px 2px rgba(45, 38, 24, .06), 0 8px 24px rgba(45, 38, 24, .08);
  --serif: ui-serif, "New York", "Iowan Old Style", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16140F; --card: #201D17; --sunk: #2A261F; --rule: #37322A;
    --ink: #F2ECDF; --ink-2: #B3AA99; --accent: #8EA0FF; --accent-fill: #4A63F5;
    --accent-wash: #232A4D; --success: #6CC08D; --mistake: #F0A066; --mistake-wash: #3A2A1C;
    --highlight: #6B5D1A; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #16140F; --card: #201D17; --sunk: #2A261F; --rule: #37322A;
  --ink: #F2ECDF; --ink-2: #B3AA99; --accent: #8EA0FF; --accent-fill: #4A63F5;
  --accent-wash: #232A4D; --success: #6CC08D; --mistake: #F0A066; --mistake-wash: #3A2A1C;
  --highlight: #6B5D1A; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 1.0625rem/1.6 var(--sans); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: .18em; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.15; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2.1rem, 6vw, 3.6rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 4vw, 2.3rem); letter-spacing: -.01em; }
h3 { font-size: 1.25rem; }
p { margin: 0; text-wrap: pretty; }
figure { margin: 0; }

.wrap { width: min(100% - 32px, 1080px); margin-inline: auto; }
.narrow { width: min(100% - 32px, 720px); margin-inline: auto; }
.eyebrow { font: 600 .75rem/1.2 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); }
.lede { font-size: 1.2rem; color: var(--ink-2); max-width: 36em; }
.note { font-size: .9rem; color: var(--ink-2); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; z-index: 10; background: var(--card); padding: 8px 12px; border-radius: 8px; }

/* Header */
.site-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font: 600 1.2rem var(--serif); }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.site-nav { display: flex; gap: 18px; font-size: .95rem; }
.site-nav a { color: var(--ink-2); text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
@media (max-width: 680px) { .site-nav { display: none; } }

.crumbs { font-size: .9rem; color: var(--ink-2); padding-top: 8px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0; }
.crumbs li + li::before { content: "›"; margin-right: 6px; }
.crumbs a { color: var(--ink-2); }

/* Hero */
.hero { display: grid; gap: 28px; padding-block: 24px 56px; }
.hero-art { position: relative; border-radius: 22px; overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 16 / 9; }
.hero-art img { width: 100%; height: 100%; object-fit: cover; }
.postmark {
  position: absolute; right: 16px; bottom: 16px; padding: 8px 14px; border-radius: 999px;
  background: rgba(20, 18, 14, .6); color: #fff; font: 600 .8rem/1.2 var(--sans); letter-spacing: .06em;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.hero-copy { display: grid; gap: 18px; align-content: center; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 6px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 22px;
  border-radius: 14px; font: 600 1rem var(--sans); text-decoration: none;
  transition: transform 140ms cubic-bezier(.23, 1, .32, 1);
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--accent-fill); color: #fff; }
.btn-secondary { background: var(--accent-wash); color: var(--accent); }
@media (min-width: 900px) {
  .hero { grid-template-columns: 1fr 1.15fr; align-items: center; gap: 48px; padding-block: 40px 80px; }
  .hero-art { order: 2; aspect-ratio: 4 / 3.4; }
}

/* Sections */
section { padding-block: 56px; }
.section-head { display: grid; gap: 12px; margin-bottom: 32px; max-width: 44em; }
.rule { border: 0; border-top: 1px solid var(--rule); margin: 0; }
.card { background: var(--card); border-radius: 18px; box-shadow: var(--shadow); padding: 22px; }
.split { display: grid; gap: 32px; align-items: center; }
@media (min-width: 860px) { .split { grid-template-columns: 1fr 1fr; gap: 56px; } .split.flip > :first-child { order: 2; } }
.stack { display: grid; gap: 14px; }

/* How it works */
.steps { display: grid; gap: 16px; counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: step; display: grid; gap: 8px; align-content: start; }
.steps li::before { content: counter(step); font: 600 2rem/1 var(--serif); color: var(--accent); }
@media (min-width: 760px) { .steps { grid-template-columns: repeat(3, 1fr); } }

/* Screenshots */
.shots { display: flex; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 8px 4px 24px; margin-inline: -4px; }
.shots figure { flex: 0 0 min(64vw, 240px); scroll-snap-align: start; display: grid; gap: 10px; }
.shots img { border-radius: 28px; box-shadow: var(--shadow); border: 1px solid var(--rule); aspect-ratio: 600 / 1304; object-fit: cover; }
.shots figcaption { font-size: .92rem; color: var(--ink-2); }
.shots figcaption b { color: var(--ink); display: block; font-family: var(--serif); font-size: 1.05rem; }
.phone { border-radius: 32px; box-shadow: var(--shadow); border: 1px solid var(--rule); max-width: 300px; justify-self: center; }

/* Chat demo */
.chat { display: grid; gap: 10px; }
.bubble { padding: 12px 16px; border-radius: 18px; max-width: 88%; }
.bubble .gloss { display: block; font-size: .9rem; color: var(--ink-2); margin-top: 2px; font-family: var(--sans); }
.tutor { background: var(--card); box-shadow: var(--shadow); font-family: var(--serif); font-size: 1.1rem; }
.you { background: var(--accent-fill); color: #fff; justify-self: end; }
.coach { background: var(--mistake-wash); color: var(--ink); font: italic 1rem/1.5 var(--serif); border-radius: 14px; max-width: 100%; }
.coach b { font-style: normal; color: var(--mistake); }

/* Story sample */
.story-art { border-radius: 18px 18px 0 0; overflow: hidden; margin: -22px -22px 18px; }
.story-text { font: 1.35rem/2.4 var(--serif); }
.story-text.plain { line-height: 1.7; }
ruby rt { font: .55em var(--sans); color: var(--ink-2); }
/* Jyutping is wider than the characters it sits over, so Cantonese words get a gap (as in the app). */
.story-text:lang(zh-HK) ruby { margin-inline: .3em; }
.story-text:lang(zh-HK) rt { font-size: .45em; }
mark { background: var(--highlight); color: inherit; border-radius: 4px; padding: 0 2px; }

/* Languages */
.langs { display: grid; gap: 20px; }
@media (min-width: 760px) { .langs { grid-template-columns: 1fr 1fr; } }
.lang { padding: 0; overflow: hidden; display: grid; align-content: start; }
.lang > img { aspect-ratio: 16 / 8; object-fit: cover; width: 100%; }
.lang-body { padding: 20px 22px 24px; display: grid; gap: 10px; }
.lang-body ul { margin: 0; padding-left: 1.1em; color: var(--ink-2); }
.lang h3 a { color: inherit; text-decoration: none; }
.lang h3 a:hover { text-decoration: underline; }
.levels { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: 600 .78rem var(--sans); padding: 4px 9px; border-radius: 8px; background: var(--sunk); color: var(--ink-2); }
.more { font-weight: 600; }

/* Tutors */
.tutors { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.tutors figure { background: var(--card); border-radius: 18px; box-shadow: var(--shadow); overflow: hidden; }
.tutors img { aspect-ratio: 360 / 400; object-fit: cover; object-position: top; width: 100%; }
.tutors figcaption { padding: 12px 14px 16px; font-size: .9rem; color: var(--ink-2); }
.tutors figcaption b { display: block; color: var(--ink); font: 600 1.05rem var(--serif); }

/* Level syllabus */
.syllabus { display: grid; gap: 16px; }
.syllabus details { background: var(--card); border-radius: 18px; box-shadow: var(--shadow); padding: 0 22px; }
.syllabus summary { cursor: pointer; list-style: none; padding: 18px 0; display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; }
.syllabus summary::-webkit-details-marker { display: none; }
.syllabus summary h3 { font-size: 1.3rem; }
.syllabus summary::after { content: "+"; margin-left: auto; color: var(--accent); font-size: 1.3rem; }
.syllabus details[open] summary::after { content: "–"; }
.units { list-style: none; padding: 0 0 18px; margin: 0; display: grid; gap: 0; }
.units li { padding: 14px 0; border-top: 1px solid var(--rule); display: grid; gap: 4px; }
.units .unit-title { font: 600 1.05rem var(--serif); }
.units .can { color: var(--ink-2); }
.units .mission { font-size: .95rem; }
.units .mission b { color: var(--accent); font-weight: 600; }

/* Goals */
.goals { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 0; }
.goals li { background: var(--card); box-shadow: var(--shadow); padding: 10px 16px; border-radius: 999px; font-weight: 600; }

/* FAQ */
.faq { display: grid; gap: 12px; max-width: 760px; }
.faq details { background: var(--card); border-radius: 14px; box-shadow: var(--shadow); padding: 4px 20px; }
.faq summary { cursor: pointer; font: 600 1.1rem/1.4 var(--serif); padding: 14px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--accent); font-family: var(--sans); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 16px; color: var(--ink-2); }

/* Long-form text: privacy, support, guides */
.prose { padding-block: 24px 64px; }
.prose > * + * { margin-top: 1em; }
.prose h1 { margin-bottom: .3em; }
.prose h2 { font-size: 1.6rem; margin-top: 2em; }
.prose h3 { margin-top: 1.5em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: .4em; }
.prose .callout { background: var(--card); border-radius: 14px; box-shadow: var(--shadow); padding: 16px 20px; }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.prose th, .prose td { text-align: left; padding: 10px 8px; border-top: 1px solid var(--rule); vertical-align: top; }
.prose th { font-family: var(--serif); }
.table-scroll { overflow-x: auto; }

.final { text-align: center; }
.final .section-head { margin-inline: auto; justify-items: center; }
.final .cta-row { justify-content: center; }
.final .icon { width: 96px; height: 96px; border-radius: 22px; box-shadow: var(--shadow); }

.site-foot { padding-block: 32px 48px; color: var(--ink-2); font-size: .9rem; display: grid; gap: 16px; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 10px 20px; }
.site-foot a { color: var(--ink-2); }