/* Layout: a question-led guide. Each topic page is headed by the question people search for,
   answered in two lines, then explored in 3D, then the related questions people also ask. */
:root {
  --bg: #f4ecdc;          /* warm drawing-paper */
  --bg-2: #ebe0c9;        /* recessed bands */
  --card: #fbf6ea;
  --ink: #33281c;
  --ink-soft: #6a5a46;
  --line: #d2c19f;
  --accent: #2c5a7a;      /* deep ink blue, the color of the pen notes */
  --accent-ink: #fbf6ea;
  --accent-soft: #dce6ec;
  --flash: #f1d98f;
  --good: #3f6b3a; --bad: #9a3b2c;
  --stage: #ece2cb;
  --font-head: "Young Serif", Georgia, "Times New Roman", serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, sans-serif;
  --r: 10px;
}
:root[data-theme="dark"] {
  --bg: #1b1814; --bg-2: #24201a; --card: #29241d; --ink: #efe6d3; --ink-soft: #bfb19a; --line: #4a4134;
  --accent: #93bfdc; --accent-ink: #1b1814; --accent-soft: #233340; --flash: #5a4b1f; --good: #9fcf8f; --bad: #f0a08e; --stage: #221e18; color-scheme: dark }

[hidden] { display: none !important }
* { box-sizing: border-box }
body { background: var(--bg); color: var(--ink); font-family: var(--font-body); font-size: 17px; line-height: 1.55;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); padding-block: 0 40px }
.wrap { max-width: 1160px; margin: 0 auto }
h1, h2, h3 { font-family: var(--font-head); font-weight: 400; text-wrap: balance; margin: 0; line-height: 1.15 }
a { color: var(--accent) }
button { font: inherit; color: inherit; cursor: pointer }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px }
p { margin: 0 }

/* top bar */
.top { position: relative; display: flex; gap: 12px; align-items: center; justify-content: space-between; padding-block: 12px; border-bottom: 1px solid var(--line) }
.head-actions { display: flex; gap: 8px; align-items: center; flex: none }
.menu-btn { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 7px 14px; min-height: 40px; font-weight: 700; font-size: .95rem }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap }
.logo span { white-space: nowrap }
.menu-btn .short { display: none }
.menu-btn svg { width: 18px; height: 18px; fill: var(--accent) }
.menu-btn[aria-expanded="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent) }
.menu-btn[aria-expanded="true"] svg { fill: var(--accent-ink) }
.lang select { font: inherit; font-size: .92rem; font-weight: 700; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 7px 10px; min-height: 40px; cursor: pointer }
.menu { position: absolute; top: calc(100% + 6px); right: 0; z-index: 20; width: min(640px, 100%); max-height: min(78vh, 760px); overflow-y: auto; overscroll-behavior: contain; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); box-shadow: 0 18px 40px -18px rgba(40,25,10,.45); padding: 12px; display: grid; gap: 10px }
.menu-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 6px }
.menu a { display: flex; gap: 10px; align-items: center; text-decoration: none; color: var(--ink); border-radius: 8px; padding: 6px }
.menu a:hover, .menu a[aria-current="page"] { background: var(--accent-soft) }
.menu a img { width: 46px; height: 32px; object-fit: cover; border-radius: 5px; flex: none; background: var(--bg-2) }
.menu a b { font-weight: 700; font-size: .95rem }
.menu .menu-home { font-weight: 700; color: var(--accent); padding: 4px 6px }
.logo { font-family: var(--font-head); font-size: 1.35rem; text-decoration: none; color: var(--ink); min-width: 0; display: inline-flex; align-items: center; gap: 8px }
.logo svg { width: 26px; height: 26px; flex: none }
.theme-btn { width: 40px; height: 40px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--ink); display: inline-grid; place-items: center; padding: 0; flex: none }
.theme-btn svg { width: 20px; height: 20px }
.theme-btn .moon { display: none }
:root[data-theme="dark"] .theme-btn .sun { display: none } :root[data-theme="dark"] .theme-btn .moon { display: block }
:root[data-theme="dark"] .illus img, :root[data-theme="dark"] .topic .pic img, :root[data-theme="dark"] .menu-grid img, :root[data-theme="dark"] .faq .ans img { filter: brightness(.88) }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--card) }
.seg button { border: 0; background: transparent; padding: 6px 13px; font-size: .92rem; min-height: 38px }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); font-weight: 700 }

/* home */
.home-hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 28px; align-items: center; padding-block: 34px 10px }
.home-hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); margin-bottom: 12px }
.home-hero p.lede { font-size: 1.15rem; color: var(--ink-soft); max-width: 40ch }
.illus { margin: 0; border-radius: var(--r); overflow: hidden; background: var(--bg-2) }
.illus img { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2 }
.search { margin-top: 22px; position: relative; max-width: 560px }
.search input { width: 100%; font: inherit; font-size: 1.05rem; padding: 14px 16px 14px 46px; border-radius: 999px; border: 1.5px solid var(--line); background: var(--card); color: var(--ink) }
.search input:focus { outline: none; border-color: var(--accent) }
.search svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; color: var(--ink-soft) }
.results { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 4px; max-width: 560px }
.results a { display: block; padding: 10px 14px; border-radius: 8px; background: var(--card); border: 1px solid var(--line); text-decoration: none; color: var(--ink) }
.results a small { display: block; color: var(--ink-soft) }
.popular { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; max-width: 620px }
.popular a { text-decoration: none; border: 1px solid var(--line); border-radius: 999px; padding: 6px 13px; font-size: .92rem; color: var(--ink); background: transparent }
.section-title { font-size: 1.6rem; margin: 34px 0 14px }
.topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: 14px }
.topic { display: grid; grid-template-rows: auto 1fr; text-decoration: none; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden }
.topic .pic { aspect-ratio: 3 / 2; background: var(--bg-2); display: grid; place-items: center; color: var(--ink-soft); font-family: var(--font-head); font-size: 2.2rem }
.topic .pic img { width: 100%; height: 100%; object-fit: cover; display: block }
.topic .txt { padding: 12px 14px 14px; display: grid; gap: 4px; align-content: start }
.topic b { font-family: var(--font-head); font-weight: 400; font-size: 1.25rem }
.topic span { color: var(--ink-soft); font-size: .95rem }
.map-lede { color: var(--ink-soft); margin: -6px 0 14px; max-width: 70ch }
.map { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: 12px }
.sys { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px }
.sys h3 { font-size: 1.12rem; margin-bottom: 8px }
.sys ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px }
.sys a { color: var(--accent); font-weight: 700; text-decoration: none }
.sys a:hover { text-decoration: underline }
.sys li.later { display: flex; gap: 8px; align-items: baseline; justify-content: space-between; color: var(--ink-soft) }
.sys li.later small { font-size: .72rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; border: 1px dashed var(--line); border-radius: 999px; padding: 0 7px; flex: none }
.menu-top { display: flex; flex-wrap: wrap; gap: 6px; align-items: center }
.menu-sys h3 { font-family: var(--font-body); font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); margin: 2px 6px 4px }
.soon-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); gap: 10px }
.soon-list li { border: 1px dashed var(--line); border-radius: var(--r); padding: 12px 14px; display: grid; gap: 2px }
.soon-list b { font-family: var(--font-head); font-weight: 400; font-size: 1.15rem }
.soon-list span { color: var(--ink-soft); font-size: .93rem }
.badge { justify-self: start; font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; border-radius: 999px; padding: 2px 9px; background: var(--bg-2); color: var(--ink-soft) }
.badge.ready { background: var(--accent-soft); color: var(--accent) }

/* topic page */
.crumb { font-size: .9rem; color: var(--ink-soft); padding-top: 18px }
.crumb a { color: var(--ink-soft) }
.topic-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 14px 24px; align-items: end; padding-block: 8px 16px }
.topic-head h1 { font-size: clamp(2rem, 4.6vw, 3.2rem) }
.level { display: grid; gap: 6px; justify-items: start }
.level small { color: var(--ink-soft); font-size: .82rem; max-width: 34ch }
.level-label { font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft) }
.quick { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: var(--r); padding: 16px 20px; display: grid; gap: 6px; max-width: 900px }
.quick .tag { font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent) }
.quick p { font-size: 1.12rem }
.flash { animation: flash 1.1s ease-out }
@keyframes flash { from { background-color: var(--flash) } to { background-color: transparent } }

.sexbar { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; padding-top: 16px }
.sexbar small { color: var(--ink-soft); font-size: .85rem }
.explorer { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 18px; padding-block: 18px; align-items: start }
.stage { position: relative; background: var(--stage); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden }
.view { position: relative }
.stage canvas { display: block; width: 100%; height: clamp(360px, 60vh, 600px); touch-action: none; cursor: grab }
.stage canvas.dragging { cursor: grabbing }
.loading { position: absolute; inset: 0; display: grid; place-items: center; color: var(--ink-soft); pointer-events: none; font-style: italic }
.loading[hidden] { display: none }
.hover { position: absolute; pointer-events: none; transform: translate(-50%, calc(-100% - 12px)); background: var(--ink); color: var(--bg); padding: 4px 10px; border-radius: 6px; font-size: .9rem; white-space: nowrap; opacity: 0; transition: opacity .12s }
.hover.on { opacity: 1 }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--line); background: var(--bg-2) }
.toolbar .views { display: flex; flex-wrap: wrap; gap: 6px; margin-right: auto }
.btn { border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 6px 13px; min-height: 38px; font-size: .92rem }
.btn:hover { border-color: var(--ink-soft) }
.btn[aria-pressed="true"], .btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent) }
.btn.primary { font-weight: 700 }
a.btn.go { justify-self: start; text-decoration: none; display: inline-flex; align-items: center }
.hint { padding: 9px 14px; font-size: .88rem; color: var(--ink-soft); border-top: 1px solid var(--line); background: var(--bg-2) }

.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 20px; display: grid; gap: 12px; min-width: 0 }
.panel h2 { font-size: 1.75rem }
.panel .tech { color: var(--ink-soft); font-size: .92rem; margin-top: -6px }
.does { display: inline-flex; gap: 8px; align-items: center; font-weight: 700; color: var(--accent) }
.dot { width: 13px; height: 13px; border-radius: 50%; border: 1px solid rgba(0,0,0,.2); flex: none; display: inline-block }
.fact { border-top: 1px dashed var(--line); padding-top: 10px; display: grid; gap: 3px }
.fact b { font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft) }
.parts { display: grid; gap: 12px; border-top: 1px solid var(--line); padding-top: 12px }
.parts h3 { font-family: var(--font-body); font-weight: 700; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft) }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px }
.chip { display: inline-flex; gap: 7px; align-items: center; border: 1px solid var(--line); background: transparent; border-radius: 999px; padding: 5px 11px 5px 8px; min-height: 34px; font-size: .9rem }
.chip[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent) }
.game { display: grid; gap: 10px }
.game .ask { font-size: 1.3rem; font-weight: 700 }
.score { font-variant-numeric: tabular-nums; font-size: .9rem; color: var(--ink-soft) }
.feedback { min-height: 1.5em; font-weight: 700 }
.feedback.good { color: var(--good) } .feedback.bad { color: var(--bad) }
.row { display: flex; flex-wrap: wrap; gap: 8px }

.faq { padding-block: 10px 0; max-width: 900px }
.faq h2 { font-size: 1.7rem; margin-bottom: 12px }
.faq details { border-bottom: 1px solid var(--line) }
.faq summary { cursor: pointer; list-style: none; padding: 14px 34px 14px 0; position: relative; font-weight: 700; font-size: 1.07rem }
.faq summary::-webkit-details-marker { display: none }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 10px; font-size: 1.4rem; color: var(--accent); font-weight: 400 }
.faq details[open] summary::after { content: "–" }
.faq .ans { padding: 0 0 16px; display: grid; gap: 10px; max-width: 70ch }
.faq .ans img { max-width: 420px; width: 100%; border-radius: 8px }
.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); gap: 12px }
footer { margin-top: 34px; padding-top: 14px; border-top: 1px solid var(--line); font-size: .82rem; color: var(--ink-soft); display: grid; gap: 6px; max-width: 85ch }

/* icons: fine ink strokes; each body system gets its own watercolor wash (irregular, like a brush mark) */
.ic { width: 1.15em; height: 1.15em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; vertical-align: -.2em }
.wash { --c: #e6d8b8; display: inline-grid; place-items: center; width: 2.3em; height: 2.3em; flex: none; color: var(--ink);
  background: color-mix(in srgb, var(--c) 80%, transparent); border-radius: 46% 54% 58% 42% / 52% 44% 56% 48% }
.wash .ic { width: 1.35em; height: 1.35em }
.wash.sm { width: 1.75em; height: 1.75em } .wash.sm .ic { width: 1.05em; height: 1.05em }
:root[data-theme="dark"] .wash { background: color-mix(in srgb, var(--c) 46%, var(--card)) }
:root[data-theme="dark"] .topic .badge-sys { background: color-mix(in srgb, var(--c) 85%, transparent); color: #33281c }
.seg button { display: inline-flex; align-items: center; gap: 6px }
.btn { display: inline-flex; align-items: center; gap: 7px }
.quick .tag { display: inline-flex; align-items: center; gap: 6px }
.fact b { display: inline-flex; align-items: center; gap: 6px }
.with-ic { display: flex; align-items: center; gap: 10px }
.sys h3 { display: flex; align-items: center; gap: 10px }
.menu-sys h3 { display: flex; align-items: center; gap: 6px }
.menu-sys h3 .ic { width: 1.25em; height: 1.25em; color: var(--ink) }
.topic { position: relative }
.topic .badge-sys { position: absolute; top: 8px; left: 8px; font-size: .9rem }
.popular a { display: inline-flex; align-items: center; gap: 7px; padding-left: 6px }
.popular a .wash { font-size: .78rem }
.crumb .wash { font-size: .7rem; vertical-align: middle; margin-right: 4px }
.faq summary { display: flex; gap: 10px; align-items: flex-start }
.faq summary .ic { color: var(--accent); margin-top: .2em }
.faq details.flash { animation: flash 1.6s ease-out }
.game .ask .ic { color: var(--good) }
.seg .ic { width: 1.3em; height: 1.3em }
.section-title .wash, .faq h2 .wash { font-size: .62em }
.topic-head h1 { display: flex; align-items: center; gap: .3em }
.topic-head h1 .wash { font-size: .5em }

/* drawn animation stage (pages without a 3D model) */
.anim .view { padding: 10px }
.anim .view svg { display: block; width: 100%; height: auto; max-height: min(600px, 72vh); margin: 0 auto }
.anim .in text { fill: #3b2f22 } .anim .in .lead { stroke: #6a5a46 }
.anim .toolbar { align-items: center }
.anim .toolbar .seg { margin-right: auto }
@media (max-width: 560px) { .anim .toolbar .seg { width: 100%; margin: 0 } .anim .toolbar .seg button { flex: 1; justify-content: center; font-size: .86rem; padding-inline: 8px } }
.anim .ctrl { display: flex; gap: 6px; flex-wrap: wrap }
.anim .agebar { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: .92rem; flex: 1 1 220px }
.anim .agebar input { flex: 1; accent-color: var(--accent); min-width: 120px; height: 30px }
.anim .agebar output { min-width: 4.6em; font-variant-numeric: tabular-nums }
.anim text { font-family: var(--font-body); font-size: 12.5px; fill: var(--ink) }
.anim .lead { stroke: var(--ink-soft); stroke-width: 1; fill: none }
.anim .wob { animation: wob 1s ease-in-out infinite; transform-box: view-box; transform-origin: 200px 112px }
.anim .wob2 { animation: wob2 .9s ease-in-out infinite; transform-box: fill-box; transform-origin: center }
@keyframes wob { 0%, 100% { transform: rotate(-4deg) } 50% { transform: rotate(4deg) } }
@keyframes wob2 { 0%, 100% { transform: rotate(-9deg) } 50% { transform: rotate(9deg) } }
.tsteps { list-style: none; margin: 6px 0 0; padding: 0; display: grid; gap: 6px }
.tsteps .chip { width: 100%; justify-content: flex-start; text-align: left }
.tsteps .num { display: inline-grid; place-items: center; width: 1.6em; height: 1.6em; border-radius: 50%; background: var(--bg-2); font-weight: 700; font-size: .8rem; flex: none }
.tsteps .chip[aria-pressed="true"] .num { background: var(--accent-ink); color: var(--accent) }
.tcount { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px }
.tcount div { background: var(--bg-2); border-radius: 8px; padding: 8px 10px; display: grid; line-height: 1.2 }
.tcount b { font-family: var(--font-head); font-weight: 400; font-size: 1.7rem }
.tcount span { font-size: .82rem; color: var(--ink-soft) }
.tlegend { list-style: none; margin: 0; padding: 0; display: grid; gap: 5px; font-size: .9rem }
.tlegend li { display: flex; align-items: center; gap: 8px }
.tlegend i { width: 18px; height: 13px; border-radius: 4px; border: 1.3px solid var(--ink); flex: none }
.tnote { font-size: .85rem; color: var(--ink-soft) }

@media (max-width: 860px) {
  .home-hero, .explorer { grid-template-columns: minmax(0, 1fr) }
  .home-hero .illus { order: -1 }
  .topic-head { grid-template-columns: minmax(0, 1fr) }
  .stage canvas { height: 380px }
  .logo { font-size: 1.15rem }
  .menu-btn .full { display: none }
  .menu-btn .short { display: inline }
  .logo svg { width: 22px; height: 22px }
  .menu { width: 100% }
}
@media (max-width: 440px) {
  .menu-btn .short { display: none }
  .toolbar .btn .lbl-spin, .toolbar #bExplode .lbl { display: none }
  .menu-btn { padding: 0; width: 40px; justify-content: center }
  .head-actions { gap: 6px }
  .logo { font-size: 1.02rem; gap: 6px }
  .logo span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important } }

/* multi-page site: skip link, language links, sources, contact form, language chooser, 404 */
.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 50; background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 999px; font-weight: 700 }
.skip-link:focus { left: 16px }
main:focus { outline: none }
.faq .ans img { height: auto }
.lang-links { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: center }
.lang-links .ic { color: var(--ink-soft) }
.lang-links a { font-weight: 700 }
.lang-links .later { opacity: .7 }
.sources { max-width: 900px; margin-top: 30px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 20px; display: grid; gap: 8px }
.sources h2 { font-size: 1.45rem; display: flex; gap: 10px; align-items: center }
.sources h2 .wash { font-size: .62em }
.sources ul { margin: 0; padding-left: 1.2em; display: grid; gap: 4px }
.sources li span, .sources li small { color: var(--ink-soft); font-size: .92rem }
.sources .review-note { color: var(--ink-soft); font-size: .88rem }
.sources .report { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center; border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 4px }
.sources .report small { color: var(--ink-soft); font-size: .85rem }
.btn { text-decoration: none; color: var(--ink) } .btn.primary { color: var(--accent-ink) }
.contact-page { max-width: 720px; padding-block: 8px 10px; display: grid; gap: 12px }
.contact-page h1 { font-size: clamp(1.9rem, 4.4vw, 2.8rem); display: flex; gap: 12px; align-items: center }
.contact-page h1 .wash { font-size: .55em; flex: none }
.contact-page .lede { font-size: 1.08rem; color: var(--ink-soft) }
.contact-form { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 20px; display: grid; gap: 16px }
.contact-form fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: 6px }
.contact-form legend, .contact-form .field > span { font-weight: 700; margin-bottom: 6px; padding: 0 }
.contact-form .opt, .contact-form .check { display: flex; gap: 10px; align-items: flex-start; cursor: pointer }
.contact-form input[type="radio"], .contact-form input[type="checkbox"] { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--accent); flex: none }
.contact-form .field { display: grid; gap: 4px }
.contact-form .field input, .contact-form textarea { font: inherit; color: var(--ink); background: var(--bg); border: 1.5px solid var(--line); border-radius: 8px; padding: 10px 12px; width: 100% }
.contact-form .field input:focus, .contact-form textarea:focus { outline: none; border-color: var(--accent) }
.contact-form textarea { resize: vertical; min-height: 140px }
.contact-form small, .contact-form .small { color: var(--ink-soft); font-size: .86rem }
.contact-form .warn { border-left: 4px solid var(--flash); background: var(--bg); border-radius: 6px; padding: 10px 12px; font-weight: 700; font-size: .95rem }
.contact-form .check { font-weight: 700 }
.contact-form .form-off { color: var(--bad); font-weight: 700 }
.choose { padding-block: 30px 10px; display: grid; gap: 14px }
.choose h1 { font-size: clamp(2rem, 5vw, 3.2rem) }
.choose h1 small { display: block; font-size: .55em; color: var(--ink-soft) }
.choose .lede { font-size: 1.1rem; color: var(--ink-soft) }
.choose-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); gap: 14px }
.choose-card .txt small { color: var(--ink-soft); font-size: .9rem }
.choose-card.suggested { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent) }
.notfound section { display: grid; gap: 8px; border-top: 1px solid var(--line); padding-top: 14px }

/* 3D: show that the model can be moved */
.badge3d { position: absolute; top: 12px; left: 12px; display: inline-flex; gap: 6px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 4px 11px 4px 8px; font-size: .85rem; color: var(--ink-soft); pointer-events: none; box-shadow: 0 4px 12px -8px rgba(40,25,10,.5) }
.badge3d b { color: var(--accent); font-weight: 700 }
.badge3d .ic { color: var(--accent); width: 1.3em; height: 1.3em }
.zoombtns { position: absolute; right: 12px; bottom: 12px; display: grid; gap: 6px }
.zoombtns .btn { width: 42px; height: 42px; min-height: 0; padding: 0; justify-content: center; font-size: 1.35rem; line-height: 1; font-weight: 700; box-shadow: 0 4px 12px -8px rgba(40,25,10,.5) }
.coach { position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); width: max-content; max-width: calc(100% - 90px); display: flex; gap: 10px; align-items: center; background: var(--ink); color: var(--bg); border-radius: 999px; padding: 8px 16px 8px 10px; font-size: .9rem; font-weight: 700; pointer-events: none; box-shadow: 0 10px 24px -12px rgba(0,0,0,.6); transition: opacity .35s }
.coach.bye { opacity: 0 }
.coach .hand { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--flash); color: #3b2f22; flex: none; animation: swipe 1.8s ease-in-out infinite }
.coach .hand .ic { width: 22px; height: 22px; stroke-width: 1.8 }
.coach .t-touch { display: none }
@media (pointer: coarse) { .coach .t-touch { display: inline } .coach .t-mouse { display: none } }
@keyframes swipe { 0%, 100% { transform: translateX(-6px) rotate(-8deg) } 50% { transform: translateX(6px) rotate(8deg) } }
@media (max-width: 560px) { .coach { font-size: .8rem; bottom: 10px; padding: 6px 12px 6px 8px; border-radius: 16px } .badge3d span { display: none } }

/* the page's own illustration, beside the quick answer */
.quick-row { display: grid; grid-template-columns: minmax(0, 900px) minmax(180px, 240px); gap: 18px; align-items: start }
.topic-fig { margin: 0; display: grid; gap: 6px }
.topic-fig img { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--r); border: 1px solid var(--line); background: var(--bg-2) }
.topic-fig figcaption { font-size: .8rem; color: var(--ink-soft) }
:root[data-theme="dark"] .topic-fig img { filter: brightness(.88) }
@media (max-width: 760px) {
  .quick-row { grid-template-columns: 1fr; gap: 10px }
  .topic-fig { grid-template-columns: 120px 1fr; align-items: center; gap: 12px }
}

/* baby teeth: the five watercolor pictures fade into each other */
.anim .view { padding: 0 }
.tframes { position: relative; aspect-ratio: 3 / 2; width: min(100%, calc(min(600px, 72vh) * 1.5)); margin: 0 auto; background: #f4ecdc; overflow: hidden }
.tframes img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .9s ease }
.tframes img.on { opacity: 1 }
:root[data-theme="dark"] .tframes img { filter: brightness(.92) }
.tlab { position: absolute; display: flex; align-items: center; transform: translateY(-50%); pointer-events: none; animation: tlabIn .6s .35s ease both }
.tlab i { width: 11px; height: 11px; margin-left: -5px; border-radius: 50%; background: #3b2f22; border: 2px solid #fbf6ea; flex: none }
.tlab b { position: relative; margin-left: 22px; font-size: .82rem; font-weight: 700; color: #3b2f22; background: rgba(251, 246, 234, .94); border: 1px solid #c9ad7c; padding: 2px 10px; border-radius: 999px; white-space: nowrap }
.tlab b::before { content: ""; position: absolute; right: 100%; top: 50%; width: 22px; border-top: 1.5px solid #3b2f22 }
.tlab.l { flex-direction: row-reverse; transform: translate(-100%, -50%) }
.tlab.l i { margin: 0 -5px 0 0 }
.tlab.l b { margin: 0 22px 0 0 }
.tlab.l b::before { right: auto; left: 100% }
@keyframes tlabIn { from { opacity: 0 } to { opacity: 1 } }
@media (max-width: 560px) { .tlab b { font-size: .7rem; padding: 1px 7px; margin-left: 12px } .tlab b::before { width: 12px } .tlab.l b { margin: 0 12px 0 0 } }
.anim .view svg.tmouth { display: block; width: 100%; height: auto; max-height: min(640px, 80vh); margin: 0 auto; background: #f4ecdc }
.tmouth .tpill rect { fill: rgba(251, 246, 234, .93); stroke: #c9ad7c; stroke-width: 2 }
.tmouth .tpill text { fill: #3b2f22; font-family: var(--font-body); font-weight: 700 }
.tmouth .tpulse { animation: tpulse 1.3s ease-in-out infinite; transform-box: fill-box; transform-origin: center }
@keyframes tpulse { 0%, 100% { transform: scale(1) } 50% { transform: scale(1.12) } }
:root[data-theme="dark"] .tmouth image { filter: brightness(.92) }
@media (max-width: 560px) { .coach { left: 10px; transform: none; max-width: calc(100% - 76px) } }

/* logo (assets/marca/logo.svg): brand brown on light pages, light ink in dark mode */
.logo { color: #35271b; line-height: 0 }
:root[data-theme="dark"] .logo { color: #efe6d3 }
.logo svg.brand { width: auto; height: 34px; max-width: 100% }
@media (max-width: 440px) { .logo svg.brand { height: 24px } }

/* install as an app (shown only when the browser offers it) */
.menu .menu-install { margin-left: auto; display: inline-flex; gap: 6px; align-items: center; border: 1px solid var(--accent); color: var(--accent); background: transparent; border-radius: 999px; padding: 6px 12px; font-weight: 700; font-size: .9rem }
.menu .menu-install:hover { background: var(--accent-soft) }

/* cookie notice */
.consent { position: fixed; left: 16px; bottom: 16px; z-index: 60; max-width: 520px; background: var(--card); color: var(--ink); border: 1px solid var(--line); border-radius: var(--r); box-shadow: 0 18px 40px -16px rgba(40,25,10,.5); padding: 14px 16px; display: grid; gap: 10px; font-size: .92rem }
.consent .row { display: flex; gap: 8px; flex-wrap: wrap }
@media (max-width: 560px) { .consent { left: 10px; right: 10px; bottom: 10px; max-width: none } }
.privacy-page section { display: grid; gap: 4px }
.privacy-page h2 { font-size: 1.3rem; margin-top: 6px }