:root {
  --bg: #fbfbfd;
  --bg-alt: #f2f2f5;
  --card: #ffffff;
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #86868b;
  --line: rgba(0, 0, 0, 0.08);
  --accent: #6b4ff0;
  --accent-hover: #5a3fe0;
  --accent-text: #ffffff;
  --music: #ff9500;
  --voice: #7c66ff;
  --clean: #28c840;
  --nav-bg: rgba(251, 251, 253, 0.72);
  --shadow-lg: 0 30px 80px -20px rgba(40, 20, 120, 0.28), 0 12px 30px -12px rgba(0, 0, 0, 0.18);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px -8px rgba(0, 0, 0, 0.08);

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", system-ui, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", system-ui, sans-serif;
  --gutter: max(16px, env(safe-area-inset-left));
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-alt: #0b0b0f;
    --card: #141418;
    --text: #f5f5f7;
    --text-2: #a1a1a6;
    --text-3: #86868b;
    --line: rgba(255, 255, 255, 0.1);
    --accent: #8a74ff;
    --accent-hover: #9c89ff;
    --music: #ff9f0a;
    --voice: #9d8cff;
    --clean: #30d158;
    --nav-bg: rgba(0, 0, 0, 0.66);
    --shadow-lg: 0 30px 80px -20px rgba(110, 80, 255, 0.35), 0 12px 30px -12px rgba(0, 0, 0, 0.6);
    --shadow-sm: 0 0 0 1px rgba(255, 255, 255, 0.06);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 64px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.47 var(--font);
  letter-spacing: -0.022em;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); text-wrap: balance; }
.lede, .sub, .step, .stat-label { text-wrap: balance; }
p { margin: 0; }

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 8px 14px; border-radius: 10px; background: var(--card); box-shadow: var(--shadow-sm);
}
.skip:focus { top: 12px; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 60%, transparent); outline-offset: 3px; }

.wrap { width: min(1080px, 100% - 2 * var(--gutter)); margin-inline: auto; }
.narrow { width: min(760px, 100% - 2 * var(--gutter)); text-align: center; }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease, background-color 300ms ease;
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav.is-dark {
  --nav-bg: rgba(0, 0, 0, 0.66); --text: #f5f5f7; --text-2: #a1a1a6; --text-3: #86868b;
  --line: rgba(255, 255, 255, 0.12); --accent: #8a74ff; --accent-hover: #9c89ff;
}
.nav-links a, .nav-brand, .nav-icon, .lang { transition: color 300ms ease, border-color 300ms ease; }
.nav-inner {
  display: flex; align-items: center; gap: 24px;
  width: min(1080px, 100% - 2 * var(--gutter)); margin-inline: auto; height: 52px;
}
.nav-brand { display: flex; align-items: center; gap: 8px; color: var(--text); font-weight: 600; font-size: 1.0625rem; }
.nav-brand:hover { text-decoration: none; }
.nav-brand img { border-radius: 6px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; font-size: 0.8125rem; }
.nav-links a { color: var(--text-2); letter-spacing: -0.01em; transition: color 150ms ease; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.lang {
  border: 1px solid var(--line); background: transparent; border-radius: 8px;
  height: 26px; padding: 0 8px; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em;
  color: var(--text-2); cursor: pointer; transition: color 150ms ease, border-color 150ms ease;
}
.lang:hover { color: var(--text); border-color: var(--text-3); }
.nav-icon { color: var(--text-2); display: flex; }
.nav-icon:hover { color: var(--text); }

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-actions { margin-left: auto; }
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 24px; border-radius: 999px;
  background: var(--accent); color: var(--accent-text);
  font-size: 1.0625rem; font-weight: 500; letter-spacing: -0.01em;
  transition: background-color 150ms ease, transform 120ms var(--ease-out);
}
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn:active { transform: scale(0.97); }
.btn-small { height: 28px; padding: 0 12px; font-size: 0.8125rem; }
.link { font-size: 1.0625rem; }

.hero {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: clamp(56px, 10vw, 112px) var(--gutter) clamp(72px, 10vw, 130px);
  --fade: min(420px, 62vw);
  background: linear-gradient(to bottom,
    var(--bg) calc(100% - var(--fade)),
    color-mix(in srgb, var(--bg) 55%, #000) calc(100% - var(--fade) * 0.55),
    color-mix(in srgb, var(--bg) 16%, #000) calc(100% - var(--fade) * 0.2),
    #000 100%);
}
.hero-icon {
  width: clamp(88px, 12vw, 112px); height: auto; margin-bottom: 20px;
  filter: drop-shadow(0 18px 30px rgba(80, 50, 200, 0.35));
}
.eyebrow {
  font-size: clamp(1.0625rem, 1.6vw, 1.3125rem); font-weight: 600; color: var(--accent);
  letter-spacing: -0.01em; margin-bottom: 10px;
}
.display {
  font-size: clamp(3rem, 9vw, 6.25rem); font-weight: 700; line-height: 1.02;
  letter-spacing: -0.045em; font-optical-sizing: auto;
}
.muted {
  background: linear-gradient(100deg, #8b6cff 0%, #c56cf0 45%, #ff8a3d 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede {
  max-width: 640px; margin-top: 22px;
  font-size: clamp(1.1875rem, 2vw, 1.5rem); line-height: 1.38; color: var(--text-2);
  letter-spacing: -0.02em;
}
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 14px 28px; margin-top: 34px; }
.fine { margin-top: 16px; font-size: 0.8125rem; color: var(--text-3); letter-spacing: -0.01em; }
.js-version:not(:empty)::before { content: " · "; }

.desk {
  position: relative; width: min(1100px, 100%); margin-top: clamp(48px, 7vw, 80px);
  aspect-ratio: 2940 / 1240; border-radius: 18px; overflow: hidden;
  box-shadow: var(--shadow-lg); background: #1b1830;
}
.desk-shot { width: 100%; height: 100%; object-fit: cover; }
.menu {
  position: absolute; left: 59.048%; top: 5.645%; width: 21.769%; height: auto;
  transform-origin: 94.7% -2%;
  filter: drop-shadow(0 16px 32px rgba(0, 0, 0, 0.45));
  transition: opacity 220ms var(--ease-out), transform 220ms var(--ease-out);
}
.menu.is-closed { opacity: 0; transform: scale(0.96) translateY(-4px); pointer-events: none; }
.desk-hit {
  position: absolute; left: 78.23%; top: 0; width: 2.9%; height: 5.24%;
  padding: 0; border: 0; background: transparent; cursor: pointer;
}
@media (max-width: 600px) {
  .desk { aspect-ratio: 1400 / 1300; border-radius: 16px; }
  .menu { left: 14%; top: 5.385%; width: 45.714%; }
  .desk-hit { left: 54.3%; width: 6.1%; height: 5%; }
}

.js [data-intro] { opacity: 0; transform: translateY(16px); }
.js .is-loaded [data-intro], .js.is-loaded [data-intro] {
  opacity: 1; transform: none;
  transition: opacity 900ms var(--ease-out), transform 900ms var(--ease-out);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.js.is-loaded .desk[data-intro] { transition-duration: 1200ms; }

.js [data-reveal] { opacity: 0; transform: translateY(28px); }
.js [data-reveal].is-in {
  opacity: 1; transform: none;
  transition: opacity 800ms var(--ease-out), transform 800ms var(--ease-out);
  transition-delay: calc(var(--i, 0) * 70ms);
}

.section { padding: clamp(96px, 14vw, 160px) 0; }
.headline {
  font-size: clamp(2.25rem, 5.6vw, 4rem); font-weight: 700; line-height: 1.06; letter-spacing: -0.04em;
}
.sub { margin-top: 18px; font-size: clamp(1.1875rem, 2vw, 1.375rem); color: var(--text-2); line-height: 1.4; }
.listen .narrow, .how .eyebrow, .how .headline, .setup .wrap { text-align: center; }
.how .headline { max-width: 720px; margin-inline: auto; }

.scene {
  position: relative; height: 460vh; margin-top: -1px;
  background: #000; color: #f5f5f7;
  --music: #ff9f0a; --voice: #a594ff;
}
.scene-sticky {
  position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden;
  display: grid; grid-template-rows: auto 1fr;
}
.scene-steps {
  list-style: none; margin: 0; padding: clamp(84px, 13vh, 140px) var(--gutter) 0;
  display: grid; text-align: center;
}
.step {
  grid-area: 1 / 1; justify-self: center; max-width: 760px;
  font-family: var(--font-display); font-size: clamp(1.5rem, 3.6vw, 2.75rem); line-height: 1.12;
  letter-spacing: -0.035em; font-weight: 600; color: #86868b;
  opacity: 0; transform: translateY(18px); filter: blur(6px);
  transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out), filter 500ms var(--ease-out);
}
.step strong { color: #f5f5f7; font-weight: 600; }
.step.is-active { opacity: 1; transform: none; filter: none; }
.step.is-past { transform: translateY(-18px); }
.scene-stage { position: relative; }
.scene-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.tag {
  position: absolute; transform: translateY(-50%);
  font-size: 0.875rem; font-weight: 600; letter-spacing: -0.01em; white-space: nowrap;
  opacity: 0; transition: opacity 400ms var(--ease-out);
}
.tag.is-on { opacity: 1; }
.tag-music { color: var(--music); }
.tag-voice { color: var(--voice); }
.tag-out { color: #f5f5f7; transform: translate(-100%, -50%); text-align: right; }
.node {
  position: absolute; width: 76px; height: 76px; translate: -50% -50%;
  display: grid; place-items: center;
}
.node > * { grid-area: 1 / 1; }
.node-mic {
  display: grid; place-items: center; width: 64px; height: 64px; border-radius: 50%;
  background: #1c1c22; color: #d2d2d7; box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12);
  transition: opacity 300ms var(--ease-out), transform 300ms var(--ease-out);
}
.node-hush {
  width: 76px; height: 76px; opacity: 0; transform: scale(0.8);
  transition: opacity 450ms var(--ease-out), transform 600ms cubic-bezier(0.34, 1.4, 0.64, 1);
}
.node::after {
  content: ""; position: absolute; inset: -18px; border-radius: 50%; z-index: -1;
  background: radial-gradient(closest-side, rgba(124, 102, 255, 0.55), transparent);
  opacity: 0; transform: scale(0.6);
  transition: opacity 600ms var(--ease-out), transform 900ms var(--ease-out);
}
.node.is-on .node-mic { opacity: 0; transform: scale(0.9); }
.node.is-on .node-hush { opacity: 1; transform: none; }
.node.is-on::after { opacity: 1; transform: scale(1.4); }

.player {
  width: min(760px, 100% - 2 * var(--gutter)); margin: 48px auto 0;
  padding: clamp(20px, 4vw, 32px); border-radius: 28px;
  background: var(--card); box-shadow: var(--shadow-sm);
}
@media (prefers-color-scheme: light) { .listen { background: var(--bg-alt); } }
.player-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.player-label { margin-right: auto; }
.legend { display: flex; align-items: center; gap: 6px; font-size: 0.8125rem; color: var(--text-2); }
.legend span + .dot { margin-left: 8px; }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }
@media (max-width: 560px) { .legend { order: 3; width: 100%; } }
.dot-voice { background: var(--voice); }
.dot-music { background: var(--music); }
.player-label { font-weight: 600; font-size: 1.0625rem; }
.player-wave { display: block; width: 100%; height: 150px; margin: 20px 0 22px; }
.player-controls { display: flex; align-items: center; gap: 22px; }
.play {
  flex: none; display: grid; place-items: center; width: 60px; height: 60px; border-radius: 50%;
  border: 0; background: var(--text); color: var(--bg); cursor: pointer;
  transition: transform 120ms var(--ease-out), opacity 150ms ease;
}
.play:active { transform: scale(0.94); }
.play > svg { grid-area: 1 / 1; transition: opacity 150ms ease, transform 200ms var(--ease-out); }
.play .i-play { translate: 1px 0; }
.play .i-pause, .play.is-playing .i-play { opacity: 0; transform: scale(0.7); }
.play.is-playing .i-pause { opacity: 1; transform: none; }
.play.is-loading { opacity: 0.6; }
.switch-wrap { display: flex; align-items: center; gap: 16px; min-width: 0; }
.switch {
  flex: none; position: relative; width: 76px; height: 44px; padding: 0; border: 0; border-radius: 999px;
  background: color-mix(in srgb, var(--text) 16%, transparent); cursor: pointer;
  transition: background-color 250ms var(--ease-out);
}
.switch[aria-checked="true"] { background: var(--accent); }
.switch-knob {
  position: absolute; top: 3px; left: 3px; width: 38px; height: 38px; border-radius: 50%;
  background: #fff; box-shadow: 0 3px 8px rgba(0, 0, 0, 0.18), 0 1px 1px rgba(0, 0, 0, 0.12);
  transition: transform 320ms cubic-bezier(0.34, 1.25, 0.64, 1), width 160ms var(--ease-out);
}
.switch:active .switch-knob { width: 44px; }
.switch[aria-checked="true"] .switch-knob { transform: translateX(32px); }
.switch[aria-checked="true"]:active .switch-knob { transform: translateX(26px); }
.switch-text { display: grid; min-width: 0; }
.switch-label { font-weight: 700; font-size: 1.25rem; letter-spacing: -0.02em; }
.switch-state { display: grid; color: var(--text-2); font-size: 0.9375rem; }
.switch-state > span { grid-area: 1 / 1; transition: opacity 200ms ease, transform 250ms var(--ease-out); }
.state-on { opacity: 0; transform: translateY(6px); }
.is-hush .state-on { opacity: 1; transform: none; color: var(--accent); }
.is-hush .state-off { opacity: 0; transform: translateY(-6px); }
.player-note { margin-top: 22px; font-size: 0.8125rem; color: var(--text-3); line-height: 1.45; }
.credit { display: block; margin-top: 2px; font-size: 0.6875rem; opacity: 0.8; }

.bento {
  display: grid; gap: 20px; margin-top: 56px;
  grid-template-columns: repeat(6, 1fr);
}
.card {
  border-radius: 28px; padding: clamp(24px, 3.4vw, 40px);
  background: var(--card); box-shadow: var(--shadow-sm);
  overflow: hidden;
}
@media (prefers-color-scheme: light) { .how { background: var(--bg); } .card { background: var(--bg-alt); box-shadow: none; } }
.card h3 { font-size: clamp(1.5rem, 2.6vw, 2rem); line-height: 1.1; letter-spacing: -0.035em; font-weight: 700; }
.card p { margin-top: 12px; color: var(--text-2); font-size: 1.0625rem; line-height: 1.45; }
.card-menu {
  grid-column: span 6; display: grid; grid-template-columns: 1fr minmax(0, 340px); gap: 32px; align-items: center;
  background:
    radial-gradient(80% 120% at 100% 0%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%),
    var(--card);
}
@media (prefers-color-scheme: light) {
  .card-menu { background: radial-gradient(80% 120% at 100% 0%, rgba(107, 79, 240, 0.16), transparent 60%), var(--bg-alt); }
}
.card-menu .card-text { max-width: 420px; }
.card-menu img { border-radius: 16px; box-shadow: 0 30px 60px -24px rgba(40, 20, 120, 0.45); }
.card-apple { grid-column: span 3; }
.card-apps { grid-column: span 3; }
.card-auto, .card-level { grid-column: span 3; }
@media (max-width: 820px) {
  .bento { grid-template-columns: 1fr; }
  .bento > .card { grid-column: auto; }
  .card-menu { grid-template-columns: 1fr; }
  .card-menu picture { max-width: 320px; margin-inline: auto; }
}
.meters { display: grid; gap: 14px; margin-bottom: 28px; }
.meter { display: grid; gap: 7px; font-size: 0.875rem; font-weight: 600; }
.meter-bar { height: 8px; border-radius: 99px; background: color-mix(in srgb, var(--text) 10%, transparent); overflow: hidden; }
.meter-bar i { display: block; height: 100%; border-radius: inherit; transform-origin: left; }
.m-raw { background: linear-gradient(90deg, #f7a54a, var(--music)); animation: raw 2.4s linear infinite; }
.m-clean { background: var(--clean); transform: scaleX(0.06); animation: clean 2.4s linear infinite; }
@keyframes raw {
  0% { transform: scaleX(0.62); } 12% { transform: scaleX(0.8); } 25% { transform: scaleX(0.55); }
  37% { transform: scaleX(0.72); } 50% { transform: scaleX(0.84); } 62% { transform: scaleX(0.6); }
  75% { transform: scaleX(0.77); } 87% { transform: scaleX(0.58); } 100% { transform: scaleX(0.62); }
}
@keyframes clean {
  0%, 100% { transform: scaleX(0.05); } 30% { transform: scaleX(0.07); } 60% { transform: scaleX(0.04); }
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 24px 0 0; }
.chips li {
  padding: 7px 14px; border-radius: 999px; font-size: 0.875rem; font-weight: 500;
  background: color-mix(in srgb, var(--text) 7%, transparent);
}
.chips { gap: 10px; }
.chips li { display: grid; place-items: center; width: 52px; height: 52px; padding: 0; border-radius: 14px; }
.chip-ico { width: 26px; height: 26px; }
.states { display: flex; align-items: center; gap: 18px; margin-bottom: 28px; }
.state { display: grid; justify-items: center; gap: 8px; margin: 0; }
.state figcaption { font-size: 0.8125rem; font-weight: 500; color: var(--text-2); }
.mb-icon {
  width: 66px; height: 48px; padding: 14px 18px; box-sizing: content-box; border-radius: 16px;
  color: var(--text); background: color-mix(in srgb, var(--text) 7%, transparent);
}
.mb-icon .waves { opacity: 0.35; }
.state-arrow { width: 40px; height: 12px; color: var(--text-3); margin-bottom: 26px; }
.js .card-auto .is-live .waves { transition: opacity 500ms var(--ease-out) 700ms; }
.card-auto.is-in .is-live .waves, html:not(.js) .is-live .waves { opacity: 1; }

.levels { display: grid; gap: 12px; margin-bottom: 28px; }
.lv { display: grid; grid-template-columns: 72px 1fr; align-items: center; gap: 12px; }
.lv-name { font-size: 0.8125rem; font-weight: 500; color: var(--text-2); }
.lv-bars { display: flex; align-items: center; justify-content: space-between; height: 44px; min-width: 0; }
.lv-bars i { width: 3px; height: 100%; border-radius: 2px; transform: scaleY(var(--h)); }
.lv-raw i { background: color-mix(in srgb, var(--text) 30%, transparent); }
.lv-even i { background: var(--voice); }
.js .card-level .lv-bars i { transform: scaleY(0.04); transition: transform 600ms var(--ease-out); }
.js .card-level.is-in .lv-bars i { transform: scaleY(var(--h)); }
.js .card-level.is-in .lv-even i { transition-delay: 250ms; }

.stats { padding-top: 0; padding-bottom: clamp(64px, 9vw, 110px); }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; text-align: center; }
.stat { display: grid; gap: 10px; justify-items: center; }
.stat-num {
  font-family: var(--font-display); font-size: clamp(3.5rem, 8vw, 5.5rem); font-weight: 700;
  letter-spacing: -0.05em; line-height: 1;
  background: linear-gradient(180deg, var(--text) 30%, color-mix(in srgb, var(--text) 55%, transparent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}
.stat-num small { font-size: 0.4em; letter-spacing: -0.02em; margin-left: 4px; }
.stat-label { max-width: 230px; color: var(--text-2); font-size: 1.0625rem; line-height: 1.35; }
.stats-note { text-align: center; margin-top: 40px; }
@media (max-width: 700px) { .stats-row { grid-template-columns: 1fr; gap: 48px; } }

.setup { background: var(--bg-alt); }
@media (prefers-color-scheme: dark) { .setup { background: var(--bg); } }
.rail-wrap { margin-top: 52px; }
.rail {
  display: flex; gap: 20px; list-style: none; margin: 0;
  padding: 4px max(var(--gutter), (100% - 1080px) / 2) 20px;
  overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none;
  scroll-padding-inline: max(var(--gutter), (100% - 1080px) / 2);
  overscroll-behavior-x: contain;
}
.rail::-webkit-scrollbar { display: none; }
.slide {
  flex: none; width: min(420px, 82vw); scroll-snap-align: start;
  border-radius: 28px; overflow: hidden; background: var(--card); box-shadow: var(--shadow-sm);
}
.slide picture { display: block; background: #fff; border-bottom: 1px solid var(--line); }
@media (prefers-color-scheme: dark) { .slide picture { background: #1e1e1e; } }
.slide-text { padding: 22px 26px 28px; }
.slide-n {
  display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: #fff; font-size: 0.8125rem; font-weight: 700; margin-bottom: 12px;
}
.slide h3 { font-size: 1.3125rem; letter-spacing: -0.025em; }
.slide p { margin-top: 6px; color: var(--text-2); }
.rail-nav {
  display: flex; justify-content: flex-end; gap: 12px;
  width: min(1080px, 100% - 2 * var(--gutter)); margin: 8px auto 0;
}
.round {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 0; cursor: pointer;
  background: color-mix(in srgb, var(--text) 9%, transparent); color: var(--text);
  transition: background-color 150ms ease, transform 120ms var(--ease-out), opacity 150ms ease;
}
.round:hover { background: color-mix(in srgb, var(--text) 14%, transparent); }
.round:active { transform: scale(0.94); }
.round:disabled { opacity: 0.35; cursor: default; }

.faq-list { margin-top: 48px; text-align: left; border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 22px 4px; cursor: pointer; list-style: none;
  font-size: clamp(1.125rem, 2vw, 1.3125rem); font-weight: 600; letter-spacing: -0.02em;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: ""; flex: none; width: 12px; height: 12px;
  border-right: 2px solid var(--text-3); border-bottom: 2px solid var(--text-3);
  transform: translateY(-3px) rotate(45deg); transition: transform 250ms var(--ease-out);
}
details[open] summary::after { transform: translateY(3px) rotate(225deg); }
details::details-content {
  block-size: 0; overflow: clip;
  transition: block-size 300ms var(--ease-out), content-visibility 300ms allow-discrete;
}
details[open]::details-content { block-size: auto; }
@supports (interpolate-size: allow-keywords) { :root { interpolate-size: allow-keywords; } }
.answer { padding: 0 4px 24px; color: var(--text-2); }
.answer ul { margin: 12px 0 0; padding-left: 20px; display: grid; gap: 8px; }
.answer strong { color: var(--text); font-weight: 600; }
.answer pre {
  margin: 12px 0 0; padding: 14px 16px; border-radius: 12px; overflow-x: auto;
  background: color-mix(in srgb, var(--text) 6%, transparent); color: var(--text);
  font: 0.875rem/1.5 ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: 0;
}

.final { padding-bottom: clamp(110px, 14vw, 170px); }
.final-icon { margin: 0 auto 28px; filter: drop-shadow(0 18px 30px rgba(80, 50, 200, 0.35)); }
.footer { border-top: 1px solid var(--line); padding: 22px 0 calc(22px + env(safe-area-inset-bottom)); font-size: 0.8125rem; color: var(--text-3); }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; }
.footer a { color: var(--text-2); }

@media (hover: hover) and (pointer: fine) {
  .slide { transition: transform 300ms var(--ease-out); }
  .slide:hover { transform: translateY(-4px); }
}

@media (prefers-reduced-motion: reduce) {
  .js [data-intro], .js [data-reveal] { transform: none; }
  .js.is-loaded [data-intro], .js [data-reveal].is-in { transition: opacity 300ms ease; }
  .step { transform: none; filter: none; transition: opacity 300ms ease; }
  .step.is-past { transform: none; }
  .m-raw, .m-clean { animation: none; }
  .js .card-level .lv-bars i { transition: none; }
  .m-raw { transform: scaleX(0.7); }
  .switch-knob, .node-hush, .node::after { transition-duration: 150ms; transition-timing-function: ease; }
  .slide:hover { transform: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .nav { background: var(--bg); backdrop-filter: none; -webkit-backdrop-filter: none; }
}