:root {
  --ink: #191919;
  --green: #114514;
  --purple: #364364;
  --paper: #f3f0e7;
  --white: #fffdf7;
  --lime: #c9ff35;
  --muted: #a8aaa2;
  --line: rgba(25, 25, 25, .18);
  --max: 1440px;
  --pad: clamp(20px, 4vw, 64px);
  --font-sans: "Inter", "Noto Sans JP", system-ui, sans-serif;
  --font-mono: "Noto Sans Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

body.menu-open { overflow: hidden; }

img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; font: inherit; }
a { color: inherit; }

::selection { color: var(--ink); background: var(--lime); }

.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;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 16px;
  color: white;
  background: var(--green);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  padding: 0 var(--pad);
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, .18);
  transition: background .3s ease, height .3s ease, backdrop-filter .3s ease;
}

.site-header.scrolled {
  height: 64px;
  background: rgba(25, 25, 25, .88);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  line-height: 1;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--ink);
  background: var(--lime);
  border-radius: 50%;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: -.04em;
}

.brand-name { font-weight: 800; letter-spacing: -.06em; }
.brand-name span { color: var(--lime); }

.global-nav {
  display: flex;
  align-items: center;
  gap: clamp(22px, 3vw, 48px);
  font-size: 13px;
  font-weight: 700;
}

.global-nav a {
  position: relative;
  text-decoration: none;
}

.global-nav > a:not(.nav-cta)::after {
  position: absolute;
  right: 0;
  bottom: -7px;
  left: 0;
  height: 1px;
  background: var(--lime);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .25s ease;
}

.global-nav > a:hover::after { transform: scaleX(1); transform-origin: left; }

.nav-cta {
  padding: 9px 16px;
  color: var(--ink);
  background: var(--white);
  border-radius: 100px;
}

.menu-button { display: none; }

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr);
  min-height: 820px;
  max-height: 980px;
  height: 100svh;
  padding: 140px var(--pad) 80px;
  color: var(--white);
  background:
    radial-gradient(circle at 20% 80%, rgba(17, 69, 20, .55), transparent 32%),
    linear-gradient(118deg, #191919 0 62%, #222 62% 100%);
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  z-index: -1;
  inset: 0;
  opacity: .1;
  background-image:
    linear-gradient(rgba(255,255,255,.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.5) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(to bottom, black, transparent 85%);
}

.hero::after {
  position: absolute;
  z-index: -1;
  top: 14%;
  right: -6vw;
  width: 36vw;
  height: 36vw;
  border: 1px solid rgba(201, 255, 53, .25);
  border-radius: 50%;
  box-shadow: 0 0 0 6vw rgba(201,255,53,.025), 0 0 0 12vw rgba(201,255,53,.018);
  content: "";
}

.hero-copy {
  align-self: center;
  position: relative;
  z-index: 2;
  padding-bottom: 30px;
}

.eyebrow, .section-label {
  margin: 0 0 28px;
  color: #6b6f67;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  line-height: 1.4;
}

.eyebrow { color: rgba(255,255,255,.54); }
.eyebrow span { margin-right: 10px; padding: 5px 9px; color: var(--ink); background: var(--lime); }

.hero h1 {
  margin: 0;
  font-size: clamp(58px, 7.3vw, 118px);
  font-weight: 900;
  letter-spacing: -.085em;
  line-height: .95;
}

.hero h1 em { color: var(--lime); font-style: normal; }

.hero-lead {
  margin: 28px 0 34px;
  color: rgba(255,255,255,.66);
  font-size: clamp(15px, 1.25vw, 19px);
  font-weight: 500;
  line-height: 1.7;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

.button, .sound-chip {
  min-height: 56px;
  border-radius: 100px;
  font-weight: 700;
  text-decoration: none;
}

.button { display: inline-flex; align-items: center; gap: 24px; padding: 0 26px; }
.button-primary { color: var(--ink); background: var(--lime); }
.button-primary span { transition: transform .2s ease; }
.button-primary:hover span { transform: translateY(4px); }

.sound-chip {
  display: inline-flex;
  gap: 13px;
  align-items: center;
  padding: 0 20px;
  color: var(--white);
  background: transparent;
  border: 1px solid rgba(255,255,255,.25);
  cursor: pointer;
}

.sound-chip:hover { border-color: var(--lime); }
.sound-bars { display: flex; gap: 3px; height: 16px; align-items: center; }
.sound-bars i { display: block; width: 2px; height: 50%; background: var(--lime); }
.sound-bars i:nth-child(2) { height: 100%; }
.sound-chip.playing .sound-bars i { animation: soundbar .6s ease-in-out infinite alternate; }
.sound-chip.playing .sound-bars i:nth-child(2) { animation-delay: -.3s; }
.sound-chip.playing .sound-bars i:nth-child(3) { animation-delay: -.15s; }

@keyframes soundbar { to { height: 18%; } }

.hero-visual {
  position: relative;
  align-self: center;
  justify-self: end;
  width: min(90%, 610px);
  margin-right: clamp(0px, 2vw, 28px);
}

.image-frame {
  position: relative;
  aspect-ratio: .82;
  padding: 12px;
  border: 1px solid rgba(255,255,255,.25);
  transform: rotate(2deg);
}

.image-frame::before {
  position: absolute;
  z-index: -1;
  inset: 25px -18px -18px 25px;
  background: var(--green);
  content: "";
}

.image-frame img {
  width: 100%;
  height: 100%;
  filter: grayscale(100%) contrast(1.18);
  object-fit: cover;
  object-position: 45% center;
}

.image-frame::after {
  position: absolute;
  inset: 12px;
  background: linear-gradient(to top, rgba(17,69,20,.48), transparent 50%);
  mix-blend-mode: multiply;
  content: "";
}

.image-index, .image-caption {
  position: absolute;
  z-index: 2;
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1.25;
}

.image-index { top: 28px; left: 28px; font-size: 11px; letter-spacing: .12em; }
.image-caption { right: 24px; bottom: 25px; color: var(--lime); font-size: 14px; }

.orbit-stamp {
  position: absolute;
  z-index: 4;
  right: -58px;
  bottom: 38px;
  display: grid;
  width: 126px;
  height: 126px;
  place-items: center;
  color: var(--lime);
  background: var(--purple);
  border-radius: 50%;
  box-shadow: 0 10px 40px rgba(0,0,0,.35);
}

.orbit-stamp svg { position: absolute; inset: 7px; width: calc(100% - 14px); height: calc(100% - 14px); animation: orbit 14s linear infinite; }
.orbit-stamp text { fill: currentColor; font: 700 10px var(--font-sans); letter-spacing: 1.2px; }
.orbit-stamp > span { font-size: 15px; font-weight: 900; letter-spacing: -.05em; }
@keyframes orbit { to { transform: rotate(360deg); } }

.hero-meta {
  position: absolute;
  right: var(--pad);
  bottom: 26px;
  left: var(--pad);
  display: flex;
  gap: 18px;
  align-items: center;
  color: rgba(255,255,255,.42);
  font: 700 9px var(--font-mono);
  letter-spacing: .18em;
}

.hero-meta-line { height: 1px; flex: 1; background: rgba(255,255,255,.14); }

.countdown-band {
  display: grid;
  grid-template-columns: .75fr 1.7fr .35fr;
  align-items: center;
  gap: 32px;
  padding: 42px var(--pad);
  color: var(--white);
  background: var(--green);
}

.countdown-band .section-label { margin: 0 0 3px; color: rgba(255,255,255,.45); }
.countdown-band h2 { margin: 0; font-size: clamp(21px, 2vw, 32px); line-height: 1.2; }

.countdown {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: clamp(8px, 1.4vw, 24px);
  font-family: var(--font-mono);
}

.countdown div { min-width: clamp(56px, 7vw, 104px); text-align: center; }
.countdown strong { display: block; font-size: clamp(38px, 5.2vw, 76px); letter-spacing: -.08em; line-height: 1; }
.countdown span { display: block; margin-top: 8px; color: rgba(255,255,255,.5); font-size: 8px; letter-spacing: .2em; }
.countdown b { color: var(--lime); font-size: clamp(30px, 4vw, 62px); line-height: .8; }
.countdown-date { margin: 0; text-align: right; font: 700 11px/1.05 var(--font-mono); letter-spacing: .18em; }
.countdown-date strong { color: var(--lime); font-size: clamp(38px, 4vw, 58px); letter-spacing: -.08em; }

.manifesto {
  display: grid;
  grid-template-columns: minmax(180px, .3fr) 1fr;
  gap: clamp(30px, 6vw, 100px);
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(100px, 12vw, 190px) var(--pad);
}

.manifesto-aside { font-size: 12px; font-weight: 600; }
.manifesto-aside .section-label { margin-bottom: 9px; }
.manifesto-aside > p:last-child { margin: 0; }
.manifesto-body h2, .sound-copy h2 {
  margin: 0;
  font-size: clamp(42px, 6vw, 88px);
  font-weight: 800;
  letter-spacing: -.075em;
  line-height: 1.14;
}
.manifesto-body h2 span, .sound-copy h2 span { color: var(--green); }
.manifesto-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; max-width: 900px; margin: 64px 0 70px; }
.manifesto-columns p { margin: 0; font-size: 15px; line-height: 2; }
.quote-strip { display: flex; justify-content: space-between; gap: 24px; padding: 21px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font: 800 clamp(13px, 1.4vw, 19px) var(--font-mono); letter-spacing: .05em; }
.quote-strip span:nth-child(2) { color: var(--green); }

.mystery {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  min-height: 700px;
  color: var(--white);
  background: var(--purple);
}

.mystery-image { position: relative; min-height: 560px; overflow: hidden; }
.mystery-image::after { position: absolute; inset: 0; background: linear-gradient(90deg, transparent 55%, rgba(54,67,100,.65)); content: ""; }
.mystery-image img { width: 100%; height: 100%; filter: grayscale(100%) contrast(1.15); object-fit: cover; }
.signal { position: absolute; z-index: 2; bottom: 30px; left: 30px; padding: 6px 10px; color: var(--lime); border: 1px solid currentColor; font: 700 10px var(--font-mono); letter-spacing: .18em; }
.mystery-copy { align-self: center; max-width: 680px; padding: 90px clamp(40px, 7vw, 120px); }
.section-label.light { color: rgba(255,255,255,.48); }
.mystery-copy h2 { margin: 0 0 48px; font-size: clamp(48px, 6vw, 90px); font-weight: 800; letter-spacing: -.075em; line-height: 1.1; }
.mystery-copy > p:not(.section-label) { max-width: 560px; margin: 0 0 20px; color: rgba(255,255,255,.68); font-size: 15px; line-height: 2; }
.status-row { display: grid; grid-template-columns: 10px auto 1fr; gap: 12px; align-items: center; margin-top: 45px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.2); font: 700 10px var(--font-mono); letter-spacing: .18em; }
.status-row i { width: 9px; height: 9px; background: var(--lime); border-radius: 50%; box-shadow: 0 0 0 4px rgba(201,255,53,.12); animation: blink 1.8s ease infinite; }
.status-row strong { justify-self: end; color: var(--lime); }
@keyframes blink { 50% { opacity: .35; } }

.sound-feature {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: clamp(50px, 8vw, 130px);
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(100px, 12vw, 180px) var(--pad);
}
.sound-copy > p:not(.section-label) { max-width: 570px; margin: 40px 0 28px; font-size: 15px; line-height: 2; }
.warning { display: flex; gap: 14px; align-items: center; width: fit-content; padding: 12px 16px; background: rgba(17,69,20,.08); border-left: 3px solid var(--green); }
.warning > span { display: grid; width: 28px; height: 28px; place-items: center; color: white; background: var(--green); border-radius: 50%; font-weight: 800; }
.warning p { margin: 0; font-size: 11px; line-height: 1.5; }
.sound-player { position: relative; min-height: 580px; padding: 0; overflow: hidden; background: var(--ink); border: 0; cursor: pointer; }
.sound-player::after { position: absolute; inset: 0; background: linear-gradient(to top, rgba(25,25,25,.8), transparent 55%); content: ""; }
.sound-player img { width: 100%; height: 100%; min-height: 580px; filter: grayscale(1) contrast(1.25); object-fit: cover; transition: transform .5s ease, filter .4s ease; }
.sound-player:hover img, .sound-player.playing img { filter: grayscale(.1) contrast(1.15); transform: scale(1.035); }
.player-overlay { position: absolute; z-index: 2; inset: 50% auto auto 50%; display: grid; gap: 15px; justify-items: center; color: var(--white); font: 700 10px var(--font-mono); letter-spacing: .15em; transform: translate(-50%, -50%); }
.play-icon { display: block; width: 88px; height: 88px; background: var(--lime); border-radius: 50%; box-shadow: 0 0 0 0 rgba(201,255,53,.35); transition: transform .2s ease; }
.play-icon::after { position: absolute; top: 31px; left: 36px; width: 0; height: 0; border-top: 13px solid transparent; border-bottom: 13px solid transparent; border-left: 20px solid var(--ink); content: ""; }
.sound-player:hover .play-icon { transform: scale(1.08); }
.sound-player.playing .play-icon { animation: pulse 1s ease infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 14px rgba(201,255,53,0); } }
.player-time { position: absolute; z-index: 2; right: 22px; bottom: 18px; color: rgba(255,255,255,.6); font: 700 9px var(--font-mono); letter-spacing: .15em; }

.tools {
  padding: clamp(100px, 11vw, 160px) var(--pad);
  color: var(--white);
  background: var(--ink);
}
.tools-heading { display: flex; justify-content: space-between; align-items: end; max-width: var(--max); margin: 0 auto 60px; }
.tools-heading h2 { margin: 0; font-size: clamp(50px, 7vw, 100px); letter-spacing: -.08em; line-height: .9; }
.tools-heading > p { max-width: 270px; margin: 0; color: rgba(255,255,255,.5); font-size: 13px; }
.tool-list { display: grid; grid-template-columns: repeat(2, 1fr); max-width: var(--max); margin: 0 auto; border-top: 1px solid rgba(255,255,255,.16); }
.tool-card { display: grid; grid-template-columns: 45px 60px 1fr 30px; gap: 20px; align-items: center; min-height: 160px; padding: 28px 30px 28px 0; border-bottom: 1px solid rgba(255,255,255,.16); text-decoration: none; transition: color .25s ease, background .25s ease, padding .25s ease; }
.tool-card:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.16); }
.tool-card:nth-child(even) { padding-left: 30px; }
.tool-card:hover { color: var(--ink); background: var(--lime); padding-right: 24px; padding-left: 24px; }
.tool-number { align-self: start; color: rgba(255,255,255,.35); font: 700 9px var(--font-mono); letter-spacing: .1em; }
.tool-card:hover .tool-number, .tool-card:hover small { color: rgba(25,25,25,.6); }
.tool-icon { display: grid; width: 54px; height: 54px; place-items: center; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; font-size: 25px; }
.tool-card:hover .tool-icon { border-color: rgba(25,25,25,.3); }
.code-icon { font: 700 13px var(--font-mono); }
.tool-text { display: grid; gap: 8px; }
.tool-text strong { font-size: clamp(18px, 2vw, 26px); letter-spacing: -.04em; line-height: 1.25; }
.tool-text small { color: rgba(255,255,255,.48); font-size: 11px; line-height: 1.5; transition: color .25s ease; }
.tool-arrow { justify-self: end; color: var(--lime); font-size: 20px; }
.tool-card:hover .tool-arrow { color: var(--ink); }
.tool-card.app-card { color: var(--lime); }
.tool-card.app-card:hover { color: var(--ink); background: var(--purple); }
.tool-card.app-card:hover .tool-number, .tool-card.app-card:hover small, .tool-card.app-card:hover .tool-arrow { color: var(--white); }

.question { padding: clamp(110px, 14vw, 210px) var(--pad); text-align: center; background: var(--lime); }
.question .section-label { margin-bottom: 15px; color: rgba(25,25,25,.55); }
.question h2 { margin: 0; font-size: clamp(64px, 10vw, 150px); font-weight: 900; letter-spacing: -.09em; line-height: 1; }
.question > p:not(.section-label):not(.retry-message) { margin: 27px 0 40px; font-size: 14px; }
.question-actions { display: flex; justify-content: center; gap: 12px; }
.answer { display: inline-flex; justify-content: space-between; align-items: center; width: min(260px, 42vw); min-height: 70px; padding: 0 24px; border: 1px solid var(--ink); border-radius: 0; font-weight: 800; text-decoration: none; cursor: pointer; }
.answer-yes { color: var(--white); background: var(--green); }
.answer-no { color: var(--ink); background: transparent; }
.answer span { font-size: 22px; transition: transform .2s ease; }
.answer:hover span { transform: translateX(5px); }
.answer-no:hover span { transform: rotate(90deg); }
.retry-message { min-height: 25px; margin: 20px 0 0; color: var(--green); font-weight: 800; }

.site-footer { padding: 70px var(--pad) 28px; color: var(--white); background: var(--purple); }
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; max-width: var(--max); margin: 0 auto 90px; }
.footer-brand { color: var(--white); }
.footer-top > p { margin: 0; text-align: right; font: 500 clamp(20px, 3vw, 40px)/1.2 var(--font-mono); letter-spacing: -.06em; }
.footer-top > p strong { color: var(--lime); font-size: 1.5em; }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; max-width: var(--max); margin: 0 auto; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.2); color: rgba(255,255,255,.5); font: 700 9px var(--font-mono); letter-spacing: .1em; }
.footer-bottom p { margin: 0; }
.footer-bottom nav { display: flex; flex-wrap: wrap; gap: 22px; justify-content: flex-end; }
.footer-bottom a { text-decoration: none; }
.footer-bottom a:hover { color: var(--lime); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1.1fr .9fr; min-height: 740px; }
  .hero-visual { width: 100%; }
  .orbit-stamp { right: -20px; }
  .countdown-band { grid-template-columns: .6fr 1.6fr; }
  .countdown-date { display: none; }
  .mystery-copy { padding-inline: 50px; }
  .sound-feature { gap: 50px; }
  .tool-card { grid-template-columns: 34px 48px 1fr 22px; gap: 13px; }
  .tool-icon { width: 44px; height: 44px; }
}

@media (max-width: 760px) {
  :root { --pad: 20px; }

  .site-header { height: 64px; }
  .brand-mark { width: 36px; height: 36px; }

  .menu-button {
    position: relative;
    z-index: 2;
    display: block;
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: 0;
    cursor: pointer;
  }
  .menu-button > span:not(.sr-only) { position: absolute; left: 9px; width: 26px; height: 2px; background: currentColor; transition: transform .25s ease, top .25s ease; }
  .menu-button > span:first-child { top: 16px; }
  .menu-button > span:nth-child(2) { top: 25px; }
  .menu-button[aria-expanded="true"] > span:first-child { top: 21px; transform: rotate(45deg); }
  .menu-button[aria-expanded="true"] > span:nth-child(2) { top: 21px; transform: rotate(-45deg); }

  .global-nav {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    color: var(--white);
    background: var(--ink);
    font-size: 28px;
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.76, 0, .24, 1);
  }
  .global-nav.open { transform: translateX(0); }
  .nav-cta { color: var(--ink); font-size: 16px; }

  .hero {
    display: block;
    min-height: 800px;
    max-height: none;
    height: 100svh;
    padding-top: 115px;
    background: radial-gradient(circle at 50% 80%, rgba(17,69,20,.7), transparent 40%), var(--ink);
  }
  .hero-copy { position: relative; z-index: 3; padding: 0; }
  .eyebrow { margin-bottom: 18px; font-size: 9px; }
  .hero h1 { font-size: clamp(48px, 14vw, 64px); }
  .hero-lead { margin: 18px 0 22px; font-size: 13px; }
  .hero-actions { gap: 8px; }
  .button, .sound-chip { min-height: 48px; font-size: 12px; }
  .button { padding: 0 18px; gap: 14px; }
  .sound-chip { padding: 0 15px; }
  .hero-visual { position: absolute; right: -14vw; bottom: 20px; width: min(68vw, 390px); opacity: .68; }
  .image-frame { padding: 7px; }
  .image-frame::after { inset: 7px; }
  .image-index, .image-caption, .orbit-stamp { display: none; }
  .hero-meta { bottom: 18px; font-size: 7px; }
  .hero-meta span:last-child { display: none; }

  .countdown-band { display: block; padding-block: 34px; }
  .countdown-band > div:first-child { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
  .countdown-band .section-label { margin: 0; }
  .countdown-band h2 { font-size: 17px; }
  .countdown { gap: 7px; justify-content: space-between; }
  .countdown div { min-width: 51px; }
  .countdown strong { font-size: clamp(32px, 11vw, 47px); }
  .countdown b { font-size: 27px; }

  .manifesto { display: block; padding-block: 100px; }
  .manifesto-aside { margin-bottom: 42px; }
  .manifesto-body h2, .sound-copy h2 { font-size: clamp(39px, 12vw, 58px); }
  .manifesto-columns { grid-template-columns: 1fr; gap: 22px; margin: 42px 0; }
  .quote-strip { align-items: flex-start; flex-direction: column; gap: 12px; font-size: 13px; }

  .mystery { grid-template-columns: 1fr; }
  .mystery-image { min-height: 430px; }
  .mystery-image::after { background: linear-gradient(to bottom, transparent 65%, var(--purple)); }
  .mystery-copy { padding: 60px 20px 90px; }
  .mystery-copy h2 { margin-bottom: 34px; font-size: clamp(45px, 14vw, 68px); }

  .sound-feature { grid-template-columns: 1fr; padding-block: 100px; }
  .sound-copy > p:not(.section-label) { margin-top: 32px; }
  .sound-player, .sound-player img { min-height: 450px; }
  .play-icon { width: 72px; height: 72px; }
  .play-icon::after { top: 24px; left: 30px; border-top-width: 12px; border-bottom-width: 12px; border-left-width: 18px; }

  .tools { padding-block: 100px; }
  .tools-heading { display: block; margin-bottom: 45px; }
  .tools-heading > p { margin-top: 28px; }
  .tool-list { grid-template-columns: 1fr; }
  .tool-card, .tool-card:nth-child(even) { grid-template-columns: 28px 42px 1fr 20px; min-height: 128px; padding: 22px 0; border-right: 0; }
  .tool-card:hover { padding-inline: 14px; }
  .tool-icon { width: 38px; height: 38px; font-size: 19px; }
  .tool-text strong { font-size: 18px; }
  .tool-text small { font-size: 10px; }

  .question h2 { font-size: clamp(57px, 18vw, 90px); }
  .question > p:not(.section-label):not(.retry-message) { margin: 20px auto 30px; max-width: 270px; }
  .question-actions { gap: 8px; }
  .answer { width: calc(50% - 4px); min-height: 60px; padding: 0 17px; }

  .site-footer { padding-top: 55px; }
  .footer-top { margin-bottom: 60px; }
  .footer-top > p { font-size: 17px; }
  .footer-bottom { display: block; }
  .footer-bottom nav { justify-content: flex-start; margin-top: 22px; line-height: 2; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}