:root {
  --ink: #11110f;
  --paper: #f1efe8;
  --acid: #eaff38;
  --muted: #77766f;
  --line: rgba(17, 17, 15, 0.2);
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  min-height: 100svh;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, Arial, Helvetica, sans-serif;
  transition: background 240ms ease, color 240ms ease;
}

button, a { color: inherit; }
button { font: inherit; }

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.2;
  z-index: 10;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.topbar, footer {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 24px 32px;
}

.topbar { top: 0; }
footer { bottom: 0; align-items: flex-end; }

.brand {
  display: flex;
  gap: 10px;
  color: inherit;
  font-size: 12px;
  font-weight: 900;
  line-height: .88;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  width: 24px;
  height: 24px;
  display: block;
  border-radius: 6px;
}

.sound-toggle, .footer-actions button, .language-picker select {
  border: 0;
  background: transparent;
  cursor: pointer;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .12em;
}

.top-actions { display: flex; align-items: center; gap: 22px; }
.language-picker select {
  padding: 7px 24px 7px 9px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  appearance: auto;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sound-toggle { display: flex; align-items: center; gap: 7px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #a8a8a1; }
.sound-toggle[aria-pressed="true"] .status-dot { background: #38c95c; box-shadow: 0 0 0 4px rgba(56,201,92,.13); }

main { min-height: 100svh; }

.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px max(32px, 8vw) 110px;
  outline: none;
}

.eyebrow {
  display: flex;
  justify-content: space-between;
  margin: 0 0 26px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .16em;
}
.eyebrow span { width: 100%; }

.answer-wrap { max-width: 1160px; }

h1 {
  margin: 0;
  font-family: Impact, Haettenschweiler, "Arial Narrow Bold", sans-serif;
  font-size: clamp(132px, 28vw, 390px);
  line-height: .7;
  letter-spacing: -.055em;
  text-transform: uppercase;
}

#message {
  max-width: 900px;
  margin: 34px 0 10px;
  font-size: clamp(25px, 4vw, 62px);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.045em;
  text-wrap: balance;
}

#source {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

:is(html:lang(ja), html:lang(ko), html:lang(zh-CN)) h1 {
  font-family: "Arial Black", "Noto Sans CJK JP", "Noto Sans CJK KR", "Noto Sans CJK SC", sans-serif;
  font-size: clamp(110px, 20vw, 300px);
  line-height: .9;
  letter-spacing: -.08em;
}

:is(html:lang(ja), html:lang(ko), html:lang(zh-CN)) #message {
  margin-top: 24px;
  line-height: 1.08;
  letter-spacing: -.025em;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.next-button {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 38px;
  padding: 14px 16px;
  border: 1px solid var(--ink);
  background: transparent;
  cursor: pointer;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .12em;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.next-button:hover { background: var(--ink); color: var(--paper); transform: translateY(-2px); }
.arrow { font-size: 18px; line-height: .5; }

footer p { margin: 0; color: var(--muted); font-size: 9px; font-weight: 800; letter-spacing: .14em; }
kbd { padding: 4px 7px; border: 1px solid var(--line); border-radius: 3px; font-family: inherit; }
.footer-actions { display: flex; align-items: center; gap: 20px; }
.footer-actions > button { white-space: nowrap; }
.theme-switch {
  display: flex;
  flex: 0 0 auto;
  padding: 2px;
  border: 1px solid var(--line);
}
.theme-switch button {
  min-width: 52px;
  padding: 6px 9px;
  transition: background 180ms ease, color 180ms ease;
}
.theme-switch button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 76px;
  z-index: 20;
  padding: 12px 16px;
  background: var(--ink);
  color: var(--paper);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .12em;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 15px);
  transition: opacity 200ms ease, transform 200ms ease;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.consent-panel, .share-panel {
  position: fixed;
  right: 24px;
  bottom: 76px;
  z-index: 30;
  width: min(560px, calc(100vw - 48px));
  padding: 24px;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 10px 10px 0 var(--acid);
}
.consent-panel[hidden], .share-panel[hidden], .consent-preferences[hidden], .consent-actions [hidden] { display: none; }
.consent-kicker { margin: 0 0 10px; color: var(--muted); font-size: 9px; font-weight: 900; letter-spacing: .16em; }
.consent-panel h2 { margin: 0; font-size: clamp(22px, 4vw, 34px); line-height: .95; letter-spacing: -.04em; }
.consent-copy > p:not(.consent-kicker) { margin: 14px 0; color: var(--muted); font-size: 13px; line-height: 1.45; }
.consent-copy a { color: inherit; font-size: 9px; font-weight: 900; letter-spacing: .12em; }
.consent-preferences { margin-top: 20px; border-top: 1px solid var(--line); }
.consent-preferences label { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.consent-preferences strong, .consent-preferences small { display: block; }
.consent-preferences strong { font-size: 10px; letter-spacing: .1em; }
.consent-preferences small { margin-top: 4px; color: var(--muted); font-size: 10px; }
.consent-preferences input { width: 18px; height: 18px; accent-color: var(--ink); }
.consent-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 22px; }
.consent-actions button { padding: 10px 12px; border: 1px solid var(--ink); background: transparent; color: inherit; cursor: pointer; font-size: 9px; font-weight: 900; letter-spacing: .09em; }
.consent-actions .consent-primary { background: var(--ink); color: var(--paper); }

.share-panel h2 { max-width: 440px; margin: 0; font-size: clamp(22px, 4vw, 34px); line-height: .95; letter-spacing: -.04em; }
.share-options { margin-top: 20px; border-top: 1px solid var(--line); }
.share-options button { position: relative; display: block; width: 100%; padding: 15px 44px 15px 0; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: inherit; text-align: left; cursor: pointer; }
.share-options strong, .share-options small { display: block; }
.share-options strong { font-size: 10px; letter-spacing: .1em; }
.share-options small { margin-top: 4px; color: var(--muted); font-size: 10px; }
.share-options button > span { position: absolute; right: 4px; top: 50%; font-size: 20px; transform: translateY(-50%); transition: transform 160ms ease; }
.share-options button:hover > span { transform: translate(5px, -50%); }
.panel-close { position: absolute; top: 14px; right: 14px; width: 30px; height: 30px; border: 0; background: transparent; color: inherit; cursor: pointer; font-size: 24px; line-height: 1; }

.privacy-page { min-height: 100vh; padding: 56px 24px; }
.privacy-document { width: min(760px, 100%); margin: 0 auto; }
.privacy-document h1 { margin: 36px 0 28px; font-size: clamp(54px, 10vw, 110px); line-height: .8; }
.privacy-document h2 { margin-top: 38px; font-size: 22px; }
.privacy-document p, .privacy-document li { color: var(--muted); font-size: 15px; line-height: 1.65; }
.privacy-document a { color: inherit; }
.privacy-back { font-size: 10px; font-weight: 900; letter-spacing: .12em; }

body.dark {
  --ink: #f0eee7;
  --paper: #0c0d0b;
  --muted: #999a92;
  --line: rgba(240, 238, 231, .2);
}
body.dark .next-button:hover { background: var(--acid); color: #11110f; border-color: var(--acid); }
body.dark .noise { mix-blend-mode: screen; opacity: .08; }

.answer-wrap.switching { animation: punch .42s cubic-bezier(.2,.85,.3,1); }
@keyframes punch {
  0% { opacity: 0; transform: translateY(24px) skewY(1deg); }
  100% { opacity: 1; transform: none; }
}

@media (max-width: 640px) {
  .topbar, footer { padding: 20px; }
  .hero { padding: 110px 20px 105px; }
  h1 { font-size: clamp(116px, 46vw, 220px); }
  #message { margin-top: 28px; font-size: clamp(27px, 9vw, 42px); }
  :is(html:lang(ja), html:lang(ko), html:lang(zh-CN)) h1 { font-size: clamp(92px, 30vw, 160px); }
  :is(html:lang(ja), html:lang(ko), html:lang(zh-CN)) #message { margin-top: 18px; }
  .footer-actions {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px 10px;
  }
  .footer-actions > button { padding-inline: 2px; font-size: clamp(8px, 2.3vw, 10px); }
  .theme-switch button { min-width: 44px; padding-inline: 7px; font-size: clamp(8px, 2.3vw, 10px); }
  footer p { display: none; }
  footer { justify-content: flex-end; }
  .consent-panel, .share-panel { right: 12px; bottom: 88px; width: calc(100vw - 24px); padding: 18px; box-shadow: 6px 6px 0 var(--acid); }
  .consent-actions { justify-content: stretch; }
  .consent-actions button { flex: 1 1 30%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}