/* The Breathing Room — AeraMax DX5 interactive manual */
@font-face { font-family: 'Fraunces'; src: url('fonts/fraunces.woff2') format('woff2'); font-weight: 100 900; font-display: swap; }
@font-face { font-family: 'Fraunces'; src: url('fonts/fraunces-italic.woff2') format('woff2'); font-weight: 100 900; font-style: italic; font-display: swap; }
@font-face { font-family: 'Manrope'; src: url('fonts/manrope.woff2') format('woff2'); font-weight: 200 800; font-display: swap; }

:root {
  --paper: #f5f1ea;
  --paper-2: #ece6dc;
  --paper-3: #e2dace;
  --ink: #26292e;
  --ink-2: #4b5058;
  --ink-3: #7b8089;
  --line: rgba(38, 41, 46, 0.12);
  --sky: #2f86d6;
  --sky-2: #7fbbe9;
  --clean: #5ab7a2;
  --amber: #e39b1b;
  --red: #d8483a;
  --blue-led: #2f9bff;
  --glass: rgba(250, 247, 242, 0.74);
  --glass-edge: rgba(255, 255, 255, 0.7);
  --shadow: 0 18px 50px -24px rgba(40, 32, 20, 0.35), 0 2px 6px rgba(40, 32, 20, 0.06);
  --radius: 18px;
  --serif: 'Fraunces', 'Iowan Old Style', 'Palatino Linotype', Georgia, serif;
  --sans: 'Manrope', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --gutter: clamp(16px, 4vw, 48px);
  --top: 60px;
  color-scheme: light;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: var(--top); -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 16px/1.6 var(--sans); overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }
h1, h2, h3 { font-family: var(--serif); font-weight: 420; letter-spacing: -0.01em; line-height: 1.08; margin: 0; font-variation-settings: 'SOFT' 100, 'opsz' 96; }
h1 em, h2 em { font-style: italic; color: var(--sky); font-weight: 380; }
h3 { font-size: 1.3rem; line-height: 1.2; }
p { margin: 0 0 0.8em; }
a { color: var(--sky); }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--sky); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--ink); color: #fff; padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; }
.eyebrow { font: 700 0.72rem/1 var(--sans); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 0.9rem; }
.lede { font-size: clamp(1rem, 1.6vw, 1.14rem); color: var(--ink-2); max-width: 44rem; }
.note { font-size: 0.86rem; color: var(--ink-3); }
.link { background: none; border: 0; padding: 0; color: var(--sky); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; font-size: inherit; }

/* ---------- top bar ---------- */
.topbar {
  position: fixed; inset: 0 0 auto 0; height: var(--top); z-index: 50;
  display: flex; align-items: center; gap: 16px; padding: 0 var(--gutter);
  background: linear-gradient(to bottom, rgba(245, 241, 234, 0.92), rgba(245, 241, 234, 0.7));
  backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand-mark { width: 16px; height: 30px; border-radius: 7px; background: linear-gradient(90deg, #f7f5f0 0 20%, #1c1d20 20% 80%, #f7f5f0 80%); box-shadow: inset 0 0 0 1.5px var(--ink); position: relative; flex: none; }
.brand-mark::after { content: ''; position: absolute; left: 50%; top: 6px; width: 5px; height: 5px; margin-left: -2.5px; border-radius: 50%; background: var(--blue-led); box-shadow: 0 0 6px var(--blue-led); animation: breathe 4s ease-in-out infinite; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand-text b { font: 500 1.02rem var(--serif); white-space: nowrap; }
.brand-text small { font-size: 0.7rem; color: var(--ink-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chapters { display: flex; gap: 2px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.chapters::-webkit-scrollbar { display: none; }
.chapters a { font-size: 0.82rem; font-weight: 600; color: var(--ink-2); text-decoration: none; padding: 7px 10px; border-radius: 999px; white-space: nowrap; transition: background 0.3s, color 0.3s; }
.chapters a:hover { background: rgba(0, 0, 0, 0.05); }
.chapters a.is-on { background: var(--ink); color: var(--paper); }
.audio-ctl { display: flex; gap: 4px; flex: none; }
.icon-btn { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.6); cursor: pointer; transition: background 0.2s, transform 0.2s; }
.icon-btn:hover { background: #fff; }
.icon-btn:active { transform: scale(0.94); }
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
#btnMute .i-off, #btnMute[aria-pressed='true'] .i-on { display: none; }
#btnMute[aria-pressed='true'] .i-off { display: block; }
#btnSound[aria-pressed='false'] { opacity: 0.45; }
@media (max-width: 980px) {
  :root { --top: 98px; }
  .topbar { flex-wrap: wrap; height: auto; min-height: var(--top); padding-top: 8px; padding-bottom: 6px; row-gap: 6px; align-content: center; }
  .audio-ctl { margin-left: auto; }
  .chapters { order: 3; width: 100%; margin: 0 calc(var(--gutter) * -1); padding: 0 var(--gutter); mask-image: linear-gradient(90deg, transparent, #000 12px, #000 calc(100% - 24px), transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12px, #000 calc(100% - 24px), transparent); }
  .chapters a { padding: 5px 10px; font-size: 0.8rem; }
}

/* ---------- the room ---------- */
.room { position: relative; height: 100vh; height: 100svh; min-height: 560px; overflow: hidden; background: #e9e4dc; }
#roomCanvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; outline: none; }
.room-veil { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(120% 90% at 20% 30%, rgba(245, 241, 234, 0.0) 40%, rgba(245, 241, 234, 0.45) 100%); }
.room.is-intro .room-veil { background: linear-gradient(100deg, rgba(245, 241, 234, 0.92) 0%, rgba(245, 241, 234, 0.55) 45%, rgba(245, 241, 234, 0) 75%); }
.intro { position: absolute; left: var(--gutter); top: calc(var(--top) + 8vh); max-width: 34rem; z-index: 5; transition: opacity 0.8s, transform 0.8s; }
.intro h1 { font-size: clamp(2.5rem, 6.4vw, 5rem); margin-bottom: 1.2rem; }
.intro .lede { max-width: 30rem; }
.intro-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 1.6rem 0 0.9rem; }
.intro-note { font-size: 0.8rem; color: var(--ink-3); }
.room:not(.is-intro) .intro { opacity: 0; transform: translateY(-16px); pointer-events: none; }
.btn { display: inline-flex; align-items: center; gap: 9px; border-radius: 999px; padding: 12px 20px; border: 1px solid var(--line); background: #fff; font-weight: 700; font-size: 0.95rem; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s, background 0.2s; text-decoration: none; color: var(--ink); }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn:disabled { opacity: 0.45; cursor: default; transform: none; box-shadow: none; }
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-ghost { background: rgba(255, 255, 255, 0.55); }
.btn-small { padding: 8px 14px; font-size: 0.84rem; }
.dot-live { width: 8px; height: 8px; border-radius: 50%; background: var(--blue-led); box-shadow: 0 0 0 0 rgba(47, 155, 255, 0.7); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(47, 155, 255, 0.6); } 70% { box-shadow: 0 0 0 10px rgba(47, 155, 255, 0); } 100% { box-shadow: 0 0 0 0 rgba(47, 155, 255, 0); } }
@keyframes breathe { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }
.scroll-cue { position: absolute; left: 50%; bottom: 18px; width: 22px; height: 36px; margin-left: -11px; border: 1.5px solid rgba(38, 41, 46, 0.35); border-radius: 12px; }
.scroll-cue span { position: absolute; left: 50%; top: 7px; width: 3px; height: 7px; margin-left: -1.5px; background: var(--ink-2); border-radius: 2px; animation: cue 2s infinite; }
@keyframes cue { 0% { transform: translateY(0); opacity: 1; } 80% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }
.room:not(.is-intro) .scroll-cue { display: none; }

.card-glass { background: var(--glass); border: 1px solid var(--glass-edge); border-radius: var(--radius); box-shadow: var(--shadow); backdrop-filter: blur(18px) saturate(1.3); -webkit-backdrop-filter: blur(18px) saturate(1.3); }
.hud { position: absolute; inset: calc(var(--top) + 12px) 14px 14px 14px; pointer-events: none; z-index: 6; }
.hud > * { pointer-events: auto; }
.hud-air { position: absolute; left: 0; top: 0; width: 300px; padding: 16px 16px 10px; }
.aq-head { display: flex; gap: 12px; align-items: center; }
.aq-ring { width: 44px; height: 44px; border-radius: 50%; flex: none; --c: #9aa3ad; background: conic-gradient(var(--c) 0 110deg, transparent 110deg 125deg, var(--c) 125deg 235deg, transparent 235deg 250deg, var(--c) 250deg 345deg, transparent 345deg); -webkit-mask: radial-gradient(circle, transparent 13px, #000 14px); mask: radial-gradient(circle, transparent 13px, #000 14px); transition: --c 0.6s; filter: drop-shadow(0 0 6px var(--c)); }
.aq-ring[data-c='blue'] { --c: var(--blue-led); } .aq-ring[data-c='amber'] { --c: var(--amber); } .aq-ring[data-c='red'] { --c: var(--red); }
.aq-label { margin: 0; font-weight: 700; font-size: 0.95rem; }
.aq-value { margin: 0; font-size: 0.8rem; color: var(--ink-3); }
.aq-value b { font: 500 1.7rem/1 var(--serif); color: var(--ink); }
.meters { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; margin: 12px 0 8px; }
.meters div { display: flex; align-items: center; gap: 8px; font-size: 0.78rem; }
.meters dt { color: var(--ink-3); width: 44px; }
.meters dd { margin: 0; flex: 1; }
meter { width: 100%; height: 8px; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; border-top: 1px solid var(--line); padding-top: 10px; }
.stat-row .k { display: block; font-size: 0.66rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-3); }
.stat-row .v { font: 500 1.05rem var(--serif); }
.stat-foot { font-size: 0.72rem; color: var(--ink-3); margin: 8px 0 4px; }
.spark { width: 100%; height: 44px; display: block; }

.hud-controls { position: absolute; right: 0; top: 0; width: 330px; max-height: 100%; overflow: auto; padding: 14px 16px 14px; scrollbar-width: thin; }
.sheet-handle { display: none; }
.unit-row { display: flex; gap: 14px; align-items: stretch; margin-bottom: 12px; }
.mini-display { width: 92px; flex: none; }
.unit-side { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.ctl-title { font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 800; color: var(--ink-3); margin: 0 0 6px; display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.ctl-title output { font-weight: 700; letter-spacing: 0; text-transform: none; color: var(--ink); font-size: 0.82rem; }
.ctl-hint { font-size: 0.78rem; color: var(--ink-2); margin: 8px 0 0; }
.rocker { width: 84px; height: 44px; border-radius: 9px; border: 0; background: #1e1f22; padding: 4px; display: flex; cursor: pointer; box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.5), 0 1px 0 #fff; position: relative; }
.rocker span { flex: 1; display: grid; place-items: center; color: #d9d9d9; font: 700 1rem var(--sans); border-radius: 6px; transition: background 0.2s, transform 0.2s; }
.rocker .rocker-o { background: linear-gradient(#3a3c40, #2a2c2f); transform: perspective(80px) rotateY(12deg); }
.rocker[aria-checked='true'] .rocker-o { background: transparent; transform: none; }
.rocker[aria-checked='true'] .rocker-i { background: linear-gradient(#3a3c40, #2a2c2f); transform: perspective(80px) rotateY(-12deg); color: #fff; }
.events { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 12px; }
.chip { display: flex; align-items: center; gap: 7px; padding: 9px 11px; border-radius: 12px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.7); cursor: pointer; font-weight: 600; font-size: 0.84rem; text-align: left; transition: background 0.2s, border-color 0.2s, transform 0.15s; }
.chip:hover { background: #fff; }
.chip:active { transform: scale(0.97); }
.chip[aria-pressed='true'], .chip.is-active { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip.is-busy { background: linear-gradient(90deg, #ffe3c2, #fff); border-color: #eab77c; }
.slider { display: block; margin: 10px 0 14px; position: relative; }
.slider input { width: 100%; accent-color: var(--ink); }
.slider.sm { font-size: 0.8rem; color: var(--ink-2); margin: 6px 0; display: grid; grid-template-columns: 64px 1fr; align-items: center; gap: 6px 10px; }
.slider.sm output { grid-column: 1; font-weight: 700; color: var(--ink); font-size: 0.78rem; }
.slider.sm input { grid-column: 2; grid-row: 1 / span 2; }
.slider-marks { position: relative; display: block; height: 14px; font-size: 0.64rem; color: var(--ink-3); }
.slider-marks i { position: absolute; transform: translateX(-50%); font-style: normal; white-space: nowrap; }
.room-size summary { cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: baseline; padding: 6px 0; border-top: 1px solid var(--line); }
.room-size summary::-webkit-details-marker { display: none; }
.room-size summary output { font-weight: 700; font-size: 0.85rem; }
.toggles { display: flex; flex-wrap: wrap; gap: 14px; margin: 10px 0 8px; border-top: 1px solid var(--line); padding-top: 10px; }
.tog { display: flex; align-items: center; gap: 6px; font-size: 0.84rem; font-weight: 600; cursor: pointer; }
.tog input { accent-color: var(--sky); width: 16px; height: 16px; }
.legend { display: flex; flex-wrap: wrap; gap: 6px; }
.legend button { display: flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.6); border-radius: 999px; padding: 4px 10px 4px 6px; font-size: 0.74rem; font-weight: 600; cursor: pointer; }
.legend button i { width: 10px; height: 10px; border-radius: 50%; background: var(--c); box-shadow: 0 0 6px var(--c); }
.legend button[aria-pressed='false'] { opacity: 0.4; }
.legend button small { color: var(--ink-3); font-weight: 500; }

/* narrow screens: HUD becomes a compact strip + bottom sheet */
@media (max-width: 760px) {
  .room { height: 100svh; min-height: 600px; }
  .intro { top: calc(var(--top) + 3vh); right: var(--gutter); }
  .hud { inset: calc(var(--top) + 8px) 8px 8px 8px; }
  .hud-air { width: auto; left: 0; right: 0; padding: 10px 12px 6px; }
  .hud-air .meters, .hud-air .spark, .hud-air .stat-foot { display: none; }
  .hud-air .stat-row { border: 0; padding-top: 6px; }
  .aq-ring { width: 34px; height: 34px; -webkit-mask: radial-gradient(circle, transparent 10px, #000 11px); mask: radial-gradient(circle, transparent 10px, #000 11px); }
  .aq-value b { font-size: 1.35rem; }
  .hud-controls { top: auto; bottom: 0; left: 0; right: 0; width: auto; max-height: 62svh; padding: 0 14px 14px; border-radius: 22px 22px 16px 16px; transition: transform 0.4s cubic-bezier(.2, .8, .2, 1); }
  .hud-controls.is-collapsed { transform: translateY(calc(100% - 52px)); }
  .sheet-handle { display: flex; flex-direction: column; align-items: center; gap: 6px; width: 100%; padding: 8px 0 10px; border: 0; background: none; font-weight: 700; font-size: 0.8rem; color: var(--ink-2); cursor: pointer; position: sticky; top: 0; background: var(--glass); z-index: 2; }
  .sheet-handle span { width: 40px; height: 4px; border-radius: 4px; background: rgba(0, 0, 0, 0.18); }
  .mini-display { width: 74px; }
}

/* ---------- display replica ---------- */
.display-panel { --lamp: #e4f3ff; --unlit: #4a4f57; user-select: none; -webkit-user-select: none; }
.dp-svg { width: 100%; height: auto; display: block; filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.25)); }
.dp-ctl { cursor: pointer; outline: none; }
.dp-ctl:focus-visible .dp-hit { stroke: var(--sky-2); stroke-width: 1.4; }
.dp-hit { fill: rgba(255, 255, 255, 0.035); stroke: rgba(255, 255, 255, 0.14); stroke-width: 0.8; transition: fill 0.2s; }
.dp-ctl:hover .dp-hit, .dp-ctl.is-pressed .dp-hit { fill: rgba(255, 255, 255, 0.1); }
.dp-icon { stroke: var(--unlit); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; transition: stroke 0.3s; }
.dp-lamp { fill: none; stroke: none; }
.dp-txt { font: 800 6.4px var(--sans); fill: var(--unlit); text-anchor: middle; letter-spacing: 0.04em; transition: fill 0.3s; }
.dp-lbl { font: 700 5.6px var(--sans); fill: #8b9098; letter-spacing: 0.06em; }
.dp-seg { fill: none; stroke: #3a3e44; stroke-width: 4.2; stroke-linecap: butt; transition: stroke 0.5s; }
.dp-glow path { fill: none; stroke: transparent; stroke-width: 6; transition: stroke 0.5s; }
.dp-bar { fill: var(--unlit); transition: fill 0.3s; }
.dp-bar.is-lit { fill: var(--lamp); filter: drop-shadow(0 0 2px var(--lamp)); }
.dp-fanicon path { fill: var(--lamp); } .dp-hub { fill: #15171a; }
.dp-led rect, .dp-led circle { fill: #4a4f57; transition: fill 0.3s; }
.dp-led[data-state='amber'] rect, .dp-led[data-state='amber'] circle { fill: var(--amber); filter: drop-shadow(0 0 2px var(--amber)); }
.dp-led[data-state='red'] rect, .dp-led[data-state='red'] circle { fill: var(--red); filter: drop-shadow(0 0 2px var(--red)); }
.dp-sunring { stroke: var(--unlit); stroke-width: 1.2; } .dp-rays path, .dp-suncore { fill: var(--unlit); transition: fill 0.3s; }
.display-panel.plasma-on .dp-rays path, .display-panel.plasma-on .dp-suncore { fill: var(--lamp); }
.display-panel.plasma-on .dp-sunring { stroke: var(--lamp); }
.display-panel.auto-on [data-ctl=auto] .dp-icon, .display-panel.aeraplus-on [data-ctl=aeraplus] .dp-icon { stroke: var(--lamp); }
.display-panel.auto-on .dp-txt-auto { fill: var(--lamp); }
.display-panel[data-ring='blue'] .dp-seg { stroke: var(--blue-led); } .display-panel[data-ring='blue'] .dp-glow path { stroke: rgba(47, 155, 255, 0.6); }
.display-panel[data-ring='amber'] .dp-seg { stroke: var(--amber); } .display-panel[data-ring='amber'] .dp-glow path { stroke: rgba(227, 155, 27, 0.6); }
.display-panel[data-ring='red'] .dp-seg { stroke: var(--red); } .display-panel[data-ring='red'] .dp-glow path { stroke: rgba(216, 72, 58, 0.6); }
.display-panel.ring-dim .dp-seg { opacity: 0.55; }
.display-panel.is-off .dp-seg, .display-panel.is-off .dp-bar { stroke: #33363b; fill: #33363b; }
.display-panel.is-off .dp-seg { fill: none; }
.display-panel.is-off .dp-glow path { stroke: transparent; }
.display-panel.is-off .dp-fanicon path, .display-panel.is-off .dp-rays path, .display-panel.is-off .dp-suncore { fill: var(--unlit); }
.display-panel.is-off .dp-sunring { stroke: var(--unlit); }

.hold-ring { position: fixed; z-index: 90; width: 64px; height: 64px; margin: -32px 0 0 -32px; pointer-events: none; opacity: 0; transform: scale(0.7); transition: opacity 0.2s, transform 0.2s; }
.hold-ring.is-on { opacity: 1; transform: scale(1); }
.hold-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.hold-ring circle { fill: rgba(255, 255, 255, 0.35); stroke: var(--sky); stroke-width: 3; stroke-dasharray: 107; stroke-dashoffset: 107; }
.hold-ring.is-hit circle { stroke: var(--clean); }
.hold-ring span { position: absolute; inset: auto 0 -20px; text-align: center; font: 800 0.72rem var(--sans); color: var(--ink); text-shadow: 0 1px 0 #fff; }

/* ---------- chapters ---------- */
.chapter { padding: clamp(64px, 10vw, 120px) var(--gutter); position: relative; }
.chapter-head { max-width: 1180px; margin: 0 auto 36px; }
.chapter h2 { font-size: clamp(2rem, 4.6vw, 3.4rem); margin-bottom: 1rem; }
.chapter:nth-of-type(odd) { background: var(--paper-2); }

/* studio */
.studio { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.9fr); gap: 22px; align-items: start; }
.studio-stage { position: relative; height: min(76vh, 760px); min-height: 480px; border-radius: 26px; overflow: hidden; background: radial-gradient(90% 70% at 50% 40%, #fbf9f5 0%, #eee8df 60%, #e3dbcf 100%); box-shadow: inset 0 0 0 1px var(--line); position: sticky; top: calc(var(--top) + 14px); }
#studioCanvas { width: 100%; height: 100%; display: block; touch-action: none; cursor: grab; outline: none; }
#studioCanvas:active { cursor: grabbing; }
.label-layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.part-label { position: absolute; left: 0; top: 0; pointer-events: auto; display: flex; align-items: center; gap: 6px; border: 0; background: none; padding: 0; cursor: pointer; opacity: 0; transition: opacity 0.35s; font: 700 0.74rem var(--sans); color: var(--ink); white-space: nowrap; }
.part-label.is-on { opacity: 1; }
.part-label i { width: 12px; height: 12px; margin: -6px 0 0 -6px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 2px var(--sky), 0 0 0 6px rgba(47, 134, 214, 0.18); flex: none; }
.part-label span { background: rgba(255, 255, 255, 0.86); padding: 4px 9px; border-radius: 999px; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08); transform: translateY(-6px); }
.part-label.flip { flex-direction: row-reverse; } .part-label.flip span { transform: translate(calc(-100% - 24px), -6px); position: absolute; left: 0; }
.part-label.is-selected i { background: var(--sky); animation: pulse 2s infinite; }
.part-label.is-selected span { background: var(--ink); color: var(--paper); }
.studio-views { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; gap: 2px; padding: 4px; background: rgba(255, 255, 255, 0.72); border-radius: 999px; box-shadow: var(--shadow); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.studio-views button { border: 0; background: none; padding: 7px 13px; border-radius: 999px; font-weight: 700; font-size: 0.8rem; cursor: pointer; }
.studio-views button.is-on { background: var(--ink); color: var(--paper); }
.studio-flags { position: absolute; top: 14px; left: 14px; display: flex; flex-direction: column; gap: 6px; }
.studio-flags span { background: rgba(255, 255, 255, 0.85); border-radius: 10px; padding: 5px 10px; font-size: 0.74rem; font-weight: 700; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06); }
.studio-flags span.warn { background: #fff1dc; color: #7a4a06; }
.studio-hint { position: absolute; top: 14px; right: 14px; max-width: 220px; font-size: 0.74rem; color: var(--ink-3); text-align: right; margin: 0; }
.studio-panel { background: #fbf9f5; border-radius: 22px; box-shadow: inset 0 0 0 1px var(--line); padding: 16px; min-height: 480px; }
.tabs { display: flex; gap: 2px; background: var(--paper-2); padding: 4px; border-radius: 14px; margin-bottom: 16px; overflow-x: auto; }
.tabs button { flex: 1; border: 0; background: none; padding: 9px 8px; border-radius: 10px; font-weight: 700; font-size: 0.8rem; cursor: pointer; white-space: nowrap; }
.tabs button[aria-selected='true'] { background: #fff; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08); }
.part-card { padding: 16px; border-radius: 16px; background: #fff; box-shadow: 0 6px 20px -12px rgba(0, 0, 0, 0.25); margin-bottom: 12px; min-height: 180px; }
.part-card h3 { margin-bottom: 0.5rem; }
.part-card p { color: var(--ink-2); font-size: 0.93rem; }
.part-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.part-actions-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.part-actions-row .btn[aria-pressed='true'] { background: var(--ink); color: var(--paper); }
.part-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.part-list button { width: 100%; text-align: left; border: 0; background: none; padding: 7px 10px; border-radius: 10px; font-size: 0.82rem; font-weight: 600; cursor: pointer; color: var(--ink-2); }
.part-list button:hover { background: var(--paper-2); }
.part-list button.is-on { background: var(--ink); color: var(--paper); }
.badge { display: inline-flex; align-items: center; gap: 5px; font-size: 0.68rem; font-weight: 800; letter-spacing: 0.03em; padding: 3px 8px; border-radius: 999px; background: #e6f4ee; color: #1d6b55; white-space: nowrap; vertical-align: middle; }
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge-conflicting { background: #fff1dc; color: #8a5300; }
.badge-unconfirmed { background: #f1ecf7; color: #5b3f86; }
.badge-estimated { background: #e8f1fb; color: #1c5a93; }
.stages { list-style: none; padding: 0; margin: 12px 0; counter-reset: st; }
.stages li { position: relative; padding: 10px 12px 10px 44px; border-radius: 14px; margin-bottom: 6px; background: #fff; transition: box-shadow 0.3s, transform 0.3s; }
.stages li::before { counter-increment: st; content: counter(st); position: absolute; left: 12px; top: 11px; width: 22px; height: 22px; border-radius: 50%; background: var(--paper-2); display: grid; place-items: center; font-size: 0.75rem; font-weight: 800; }
.stages li.is-on { box-shadow: 0 0 0 2px var(--sky); }
.stages li b { display: block; font-size: 0.92rem; }
.stages li span { font-size: 0.84rem; color: var(--ink-2); }
.flow-count { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.flow-count div { background: #fff; border-radius: 12px; padding: 8px; text-align: center; }
.flow-count b { display: block; font: 500 1.2rem var(--serif); }
.flow-count small { font-size: 0.7rem; color: var(--ink-3); }

/* sequences (setup / replacement) */
.seq-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 10px; }
.seq-progress { display: flex; gap: 4px; flex: 1; }
.seq-progress i { flex: 1; height: 4px; border-radius: 3px; background: var(--paper-3); transition: background 0.3s; }
.seq-progress i.done { background: var(--clean); } .seq-progress i.now { background: var(--sky); }
.seq-step { background: #fff; border-radius: 16px; padding: 16px; box-shadow: 0 6px 20px -12px rgba(0, 0, 0, 0.25); min-height: 220px; }
.seq-step .num { font: 500 0.85rem var(--serif); color: var(--sky); }
.seq-step h3 { margin: 4px 0 8px; }
.seq-step p { color: var(--ink-2); font-size: 0.94rem; }
.seq-step .warnbox { background: #fff1dc; border-radius: 12px; padding: 10px 12px; font-size: 0.86rem; color: #6d4200; margin-bottom: 10px; }
.seq-step .quote { border-left: 3px solid var(--paper-3); padding-left: 10px; font-size: 0.84rem; color: var(--ink-3); font-style: italic; }
.seq-task { display: flex; align-items: center; gap: 10px; background: var(--paper); border-radius: 12px; padding: 10px 12px; font-size: 0.86rem; font-weight: 600; margin: 10px 0; }
.seq-task.done { background: #e6f4ee; color: #1d6b55; }
.seq-task .tick { width: 20px; height: 20px; border-radius: 50%; border: 2px solid currentColor; flex: none; display: grid; place-items: center; font-size: 0.7rem; }
.seq-nav { display: flex; justify-content: space-between; gap: 8px; margin-top: 12px; flex-wrap: wrap; }

@media (max-width: 980px) {
  .studio { grid-template-columns: 1fr; }
  .studio-stage { position: relative; top: 0; height: 64svh; min-height: 380px; }
  .studio-panel { min-height: 0; }
  .studio-hint { display: none; }
}

/* decoder */
.decoder { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: start; }
.decoder-panel { position: sticky; top: calc(var(--top) + 20px); padding: 26px 40px; background: linear-gradient(160deg, #26292e, #0f1012); border-radius: 30px; box-shadow: var(--shadow); }
.decoder-caption { color: #c9ccd1; font-size: 0.82rem; text-align: center; margin: 14px 0 0; min-height: 2.6em; }
.decoder-list { display: grid; gap: 8px; }
.decoder-item { text-align: left; display: grid; grid-template-columns: 34px 1fr; gap: 4px 14px; padding: 14px 16px; background: #fbf9f5; border: 1px solid var(--line); border-radius: 16px; cursor: pointer; transition: background 0.2s, box-shadow 0.2s; }
.decoder-item:hover { background: #fff; }
.decoder-item[aria-selected='true'] { background: #fff; box-shadow: 0 0 0 2px var(--ink); }
.decoder-item .sw { grid-row: span 2; width: 30px; height: 30px; border-radius: 50%; background: var(--sw, #999); box-shadow: 0 0 10px var(--sw, transparent); align-self: center; }
.decoder-item b { font-size: 0.98rem; }
.decoder-item span { font-size: 0.87rem; color: var(--ink-2); }
.decoder-item .src { grid-column: 2; font-size: 0.72rem; color: var(--ink-3); }
@media (max-width: 760px) {
  .decoder { grid-template-columns: 1fr; gap: 18px; }
  .decoder-panel { position: sticky; top: calc(var(--top) + 6px); z-index: 3; padding: 12px; display: flex; gap: 12px; align-items: center; border-radius: 20px; }
  .decoder-panel > div { width: 64px; flex: none; }
  .decoder-caption { text-align: left; margin: 0; }
}

/* everyday */
.modes { max-width: 1180px; margin: 0 auto 36px; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.mode-card { background: #fbf9f5; border-radius: 20px; padding: 20px; box-shadow: inset 0 0 0 1px var(--line); }
.mode-card h3 { margin-bottom: 6px; }
.mode-card p { font-size: 0.92rem; color: var(--ink-2); }
.mode-card .try { margin-top: 6px; }
.speed-table-wrap { max-width: 1180px; margin: 0 auto 36px; }
.speed-table-wrap h3 small { font: 500 0.85rem var(--sans); color: var(--ink-3); }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: 16px; box-shadow: inset 0 0 0 1px var(--line); background: #fbf9f5; margin: 12px 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); font-weight: 800; background: rgba(0, 0, 0, 0.02); }
tr:last-child td { border-bottom: 0; }
.speed-table td:first-child { font-weight: 800; }
.habits { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.habit { padding: 16px 18px; border-left: 3px solid var(--sky-2); background: rgba(255, 255, 255, 0.5); border-radius: 0 14px 14px 0; }
.habit b { display: block; margin-bottom: 4px; }
.habit p { font-size: 0.9rem; color: var(--ink-2); margin: 0; }

/* placement */
.place { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.9fr); gap: 26px; align-items: start; }
.plan-wrap { background: #fbf9f5; border-radius: 24px; box-shadow: inset 0 0 0 1px var(--line); padding: 14px; }
#plan { width: 100%; height: auto; display: block; touch-action: none; }
#plan .wall { fill: none; stroke: #4b5058; stroke-width: 5; stroke-linecap: square; }
#plan .open-side { stroke: #b9b2a6; stroke-dasharray: 5 6; stroke-width: 2; }
#plan .furn { fill: #e6ddcf; stroke: #cfc3b1; stroke-width: 1; }
#plan .furn-lbl { font: 700 8px var(--sans); fill: #8a7f70; text-anchor: middle; letter-spacing: 0.04em; text-transform: uppercase; }
#plan .win { stroke: #7fbbe9; stroke-width: 6; }
#plan .spot { cursor: pointer; }
#plan .spot circle { stroke-width: 1.5; }
#plan .spot.good circle { fill: rgba(90, 183, 162, 0.18); stroke: var(--clean); }
#plan .spot.bad circle { fill: rgba(216, 72, 58, 0.12); stroke: var(--red); }
#plan .spot text { font: 800 8px var(--sans); text-anchor: middle; }
#plan .spot.good text { fill: #1d6b55; } #plan .spot.bad text { fill: #9b2e23; }
#plan .clear-ring { fill: none; stroke: var(--sky); stroke-dasharray: 3 4; stroke-width: 1.2; }
#plan .unit { cursor: grab; outline: none; }
#plan .unit:focus-visible .unit-body { stroke: var(--sky); stroke-width: 2.5; }
#plan .unit-body { fill: #fff; stroke: #26292e; stroke-width: 1.6; }
#plan .unit-front { fill: #26292e; }
#plan .intake-cone { fill: rgba(47, 134, 214, 0.12); }
#plan .jet { fill: none; stroke: rgba(90, 183, 162, 0.7); stroke-width: 2; stroke-linecap: round; stroke-dasharray: 2 5; animation: dash 1.2s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -14; } }
.verdict { background: #fff; border-radius: 18px; padding: 18px; box-shadow: 0 6px 20px -12px rgba(0, 0, 0, 0.25); margin-bottom: 12px; }
.verdict .score { font: 500 2rem/1 var(--serif); }
.verdict.good .score { color: #1d6b55; } .verdict.ok .score { color: #8a5300; } .verdict.bad .score { color: #9b2e23; }
.verdict ul { margin: 10px 0 0; padding-left: 18px; font-size: 0.9rem; color: var(--ink-2); }
.verdict li.good::marker { color: var(--clean); } .verdict li.bad::marker { color: var(--red); }
.place-rules { font-size: 0.86rem; color: var(--ink-2); padding-left: 18px; margin-top: 16px; }
.place-rules li { margin-bottom: 6px; }
@media (max-width: 860px) { .place { grid-template-columns: 1fr; } }

/* troubleshoot */
.flow { max-width: 860px; margin: 0 auto; }
.flow-card { background: #fbf9f5; border-radius: 22px; padding: 22px; box-shadow: inset 0 0 0 1px var(--line); animation: rise 0.4s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
.flow-crumbs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; font-size: 0.78rem; }
.flow-crumbs button { border: 0; background: var(--paper-2); border-radius: 999px; padding: 4px 10px; cursor: pointer; font-weight: 600; font-size: 0.78rem; }
.flow-q { font: 420 1.5rem/1.2 var(--serif); margin: 0 0 14px; }
.flow-opts { display: grid; gap: 8px; }
.flow-opts button { text-align: left; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--line); background: #fff; cursor: pointer; font-weight: 600; transition: transform 0.15s, box-shadow 0.2s; display: flex; justify-content: space-between; gap: 10px; }
.flow-opts button:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.flow-opts button::after { content: '→'; color: var(--ink-3); }
.flow-answer ol, .flow-answer ul { padding-left: 20px; }
.flow-answer li { margin-bottom: 6px; }
.flow-answer .src { font-size: 0.76rem; color: var(--ink-3); }
.flow-answer .actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

/* care */
.timeline { max-width: 1180px; margin: 0 auto 30px; background: #fbf9f5; border-radius: 22px; padding: 22px 22px 16px; box-shadow: inset 0 0 0 1px var(--line); }
.tl-track { position: relative; height: 96px; margin: 10px 8px 26px; }
.tl-axis { position: absolute; left: 0; right: 0; top: 48px; height: 2px; background: var(--paper-3); }
.tl-m { position: absolute; top: 56px; font-size: 0.68rem; color: var(--ink-3); transform: translateX(-50%); }
.tl-ev { position: absolute; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 4px; font-size: 0.7rem; font-weight: 700; white-space: nowrap; }
.tl-ev i { width: 14px; height: 14px; border-radius: 50%; border: 3px solid #fff; box-shadow: 0 0 0 1.5px currentColor; background: currentColor; }
.tl-ev.carbon { top: 8px; color: #3d4a3f; } .tl-ev.hepa { top: 8px; color: var(--sky); }
.tl-ev.carbon span, .tl-ev.hepa span { order: -1; }
.tl-legend { display: flex; flex-wrap: wrap; gap: 16px; font-size: 0.84rem; color: var(--ink-2); }
.care-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 14px; }
.care-card { background: #fbf9f5; border-radius: 20px; padding: 20px; box-shadow: inset 0 0 0 1px var(--line); }
.care-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.care-card ul { padding-left: 18px; margin: 0; font-size: 0.9rem; color: var(--ink-2); }
.care-card li { margin-bottom: 6px; }

/* specs */
.badge-key { display: flex; flex-wrap: wrap; gap: 8px; }
.spec-table { max-width: 1180px; }
.spec-table td:first-child { font-weight: 700; width: 24%; }
.spec-table .src-links a { font-size: 0.74rem; margin-right: 8px; }
.spec-table .n { display: block; font-size: 0.8rem; color: var(--ink-3); margin-top: 3px; }
#specs .table-scroll, .sim-notes, .sources, .sources-title, .disclaimer { max-width: 1180px; margin-left: auto; margin-right: auto; }
.sim-notes { background: #fbf9f5; border-radius: 16px; padding: 14px 18px; box-shadow: inset 0 0 0 1px var(--line); margin-top: 18px; }
.sim-notes summary { cursor: pointer; font-weight: 800; }
.sim-notes ul { font-size: 0.9rem; color: var(--ink-2); }
.sources-title { margin-top: 30px; }
.sources { font-size: 0.88rem; color: var(--ink-2); }
.sources li { margin-bottom: 6px; }
.disclaimer { font-size: 0.78rem; color: var(--ink-3); margin-top: 26px; }

/* captions & tour */
.captions { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); z-index: 60; max-width: min(760px, calc(100vw - 28px)); background: rgba(24, 26, 29, 0.86); color: #fbfaf7; padding: 12px 18px; border-radius: 16px; font-size: 1.02rem; line-height: 1.45; text-align: center; box-shadow: 0 16px 40px -16px rgba(0, 0, 0, 0.5); backdrop-filter: blur(8px); transition: opacity 0.4s, transform 0.4s; pointer-events: none; }
.captions.is-empty { opacity: 0; transform: translate(-50%, 8px); }
body.touring .captions { bottom: 84px; }
.tourbar { position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%); z-index: 61; display: flex; align-items: center; gap: 6px; padding: 6px; background: rgba(255, 255, 255, 0.9); border-radius: 999px; box-shadow: var(--shadow); backdrop-filter: blur(12px); max-width: calc(100vw - 20px); }
.tourbar .icon-btn { width: 40px; height: 40px; }
#tourPlay .i-play { display: none; } #tourPlay.is-paused .i-play { display: block; } #tourPlay.is-paused .i-pause { display: none; }
.tour-steps { display: flex; gap: 3px; margin: 0 6px; }
.tour-steps i { width: 14px; height: 4px; border-radius: 3px; background: var(--paper-3); }
.tour-steps i.done { background: var(--clean); } .tour-steps i.now { background: var(--sky); width: 24px; }
.tour-title { font-size: 0.8rem; font-weight: 700; padding-right: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 200px; }
@media (max-width: 600px) { .tour-title { display: none; } .tour-steps i { width: 8px; } .tour-steps i.now { width: 16px; } .captions { font-size: 0.94rem; } }
body.touring .hud-controls.is-collapsed { transform: translateY(calc(100% - 52px)); }
.toast-msg { position: fixed; top: calc(var(--top) + 12px); left: 50%; transform: translate(-50%, -10px); z-index: 70; background: var(--ink); color: var(--paper); padding: 9px 16px; border-radius: 999px; font-size: 0.86rem; font-weight: 600; opacity: 0; transition: opacity 0.3s, transform 0.3s; pointer-events: none; max-width: calc(100vw - 24px); text-align: center; }
.toast-msg.is-on { opacity: 1; transform: translate(-50%, 0); }
.noscript-card { position: fixed; inset: 0; z-index: 99; margin: 0; display: grid; place-content: center; gap: 18px; padding: 24px; background: var(--paper); text-align: center; }
.noscript-card img { width: min(720px, 100%); border-radius: 22px; box-shadow: var(--shadow); }
.noscript-card figcaption { max-width: 34rem; margin: 0 auto; color: var(--ink-2); }

/* ---------- graceful fallbacks (created by JS only on a real failure) ---------- */
.still { margin: 0; position: absolute; inset: 0; overflow: hidden; }
.still-room { z-index: 0; background: radial-gradient(120% 90% at 62% 30%, #fbf6ec 0%, #efe7da 45%, #e2d8c8 100%); }
.still-room img { width: 100%; height: 100%; object-fit: cover; display: block; animation: still-in 1.2s ease both; }
.still-room.no-image img { display: none; }
.still-studio img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: 0; transition: opacity 0.6s ease; }
.still-studio img.is-on { opacity: 1; }
.still-studio img.is-broken { display: none; }
.still-studio.is-wrapped::after { content: 'New filters still in their bags'; position: absolute; left: 14px; bottom: 64px; font-size: 0.72rem; font-weight: 700; background: rgba(255, 255, 255, 0.8); padding: 4px 10px; border-radius: 999px; }
.studio-stage.is-still .studio-hint { display: none; }
@keyframes still-in { from { opacity: 0; transform: scale(1.02); } }
.still-chip {
  position: absolute; left: 50%; bottom: 72px; transform: translateX(-50%); z-index: 3; margin: 0;
  padding: 6px 13px; border-radius: 999px; background: rgba(255, 255, 255, 0.7); color: var(--ink-2);
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.01em; white-space: nowrap;
  box-shadow: 0 6px 18px -10px rgba(40, 32, 20, 0.35); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  pointer-events: none;
}
.still-studio .still-chip { left: auto; right: 14px; top: 14px; bottom: auto; transform: none; }
@media (max-width: 600px) { .still-chip { white-space: normal; text-align: center; max-width: calc(100% - 40px); } .still-studio .still-chip { max-width: 55%; text-align: right; } }
.motes { position: absolute; inset: 0; z-index: 1; pointer-events: none; overflow: hidden; }
.motes i { position: absolute; left: var(--x); top: var(--y); width: var(--s); height: var(--s); border-radius: 50%; background: rgba(255, 250, 238, 0.9); box-shadow: 0 0 10px rgba(255, 236, 200, 0.9); opacity: 0; animation: drift var(--d) linear var(--delay) infinite; }
@keyframes drift { 0% { transform: translate(0, 24px); opacity: 0; } 15% { opacity: 0.75; } 80% { opacity: 0.5; } 100% { transform: translate(var(--dx), -110px); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .motes i { animation: none; opacity: 0.45; } }
.hud-air.is-resting .aq-head { align-items: flex-start; }
.rest-orb { width: 40px; height: 40px; flex: none; border-radius: 50%; background: radial-gradient(circle at 40% 35%, #ffffff 0%, #e8f3fb 40%, #cfe3f2 70%, rgba(207, 227, 242, 0) 72%); box-shadow: 0 0 0 1px rgba(47, 134, 214, 0.15), 0 0 24px rgba(127, 187, 233, 0.45); animation: breathe 6s ease-in-out infinite; }
.rest-text { font-size: 0.8rem; color: var(--ink-2); margin: 3px 0 0; line-height: 1.45; }
@media (max-width: 760px) { .rest-text { display: none; } }