/* ---------- tokens ----------
   Motion tokens are driven live by the Motion desk.
   Chrome tokens theme the studio itself: Paper (default) and Graphite.
   Content (paper sheets, documents, specimens, stages) keeps its own fixed colors. */
:root {
  --dur: 520ms;
  --ease: cubic-bezier(0.22, 1.35, 0.32, 1);
  --travel: 8px;
  --press: 0.96;
  --blur: 16px;
  --glass: 0.28;
  --glow: 0.65;
  --radius: 32px;
  --accent: #19d3ee;

  --ink: #17181d;
  --paper: #e7e3db;
  --paper-2: #f6f3ed;
  --raised: #ffffff;
  --field: rgba(255, 255, 255, 0.72);
  --chip: rgba(255, 255, 255, 0.6);
  --hover: rgba(255, 255, 255, 0.55);
  --panel-wash: rgba(255, 255, 255, 0.35);
  --line: rgba(23, 24, 29, 0.1);
  --line-strong: rgba(23, 24, 29, 0.18);
  --muted: #5e646e;
  --inverse: #17181d;
  --on-inverse: #f6f3ed;
  --brand: #0aa8c4;
  --focus: #0a7f95;
  --glass-bg: rgba(255, 255, 255, 0.62);
  --glass-line: rgba(255, 255, 255, 0.55);
  --shadow-1: 0 4px 12px rgba(30, 24, 16, 0.08);
  --shadow-2: 0 10px 24px rgba(40, 32, 20, 0.08);
  --shadow-3: 0 18px 50px rgba(30, 24, 16, 0.16);
  --well: #d8d3c9;
  --track: rgba(23, 24, 29, 0.16);
  --font-ui: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  --font-num: Bahnschrift, "DIN Alternate", "DIN Next", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "Cascadia Mono", Consolas, "SF Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}
html[data-theme="graphite"] {
  --ink: #ece8e1;
  --paper: #141519;
  --paper-2: #1b1c21;
  --raised: #2a2c33;
  --field: rgba(255, 255, 255, 0.06);
  --chip: rgba(255, 255, 255, 0.06);
  --hover: rgba(255, 255, 255, 0.07);
  --panel-wash: rgba(255, 255, 255, 0.025);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --muted: #9ba1ab;
  --inverse: #ece8e1;
  --on-inverse: #141519;
  --brand: #19d3ee;
  --focus: #19d3ee;
  --glass-bg: rgba(32, 34, 40, 0.74);
  --glass-line: rgba(255, 255, 255, 0.1);
  --shadow-1: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-2: 0 10px 24px rgba(0, 0, 0, 0.32);
  --shadow-3: 0 18px 50px rgba(0, 0, 0, 0.5);
  --well: #0e0f12;
  --track: rgba(255, 255, 255, 0.16);
  color-scheme: dark;
}

/* ---------- derived chrome tokens (shell-owned) ---------- */
:root {
  --thumb: #ffffff;
  --thumb-line: rgba(23, 24, 29, 0.2);
  --ok: #1f8a5c;
  --warn: #9c3a18;
  --scrim: rgba(23, 24, 29, 0.26);
  --kbd-bg: rgba(255, 255, 255, 0.78);
  --kbd-ink: #5e646e;
  --seg-bg: rgba(23, 24, 29, 0.045);
  --code-bg: #15161b;
  --menu-bg: rgba(251, 250, 247, 0.86);
  --sheet-bg: rgba(250, 248, 244, 0.95);
  --tilt: 6deg;
  --hit: 36px;
  --header-h: 64px;
}
html[data-theme="graphite"] {
  --thumb: #ece8e1;
  --thumb-line: rgba(0, 0, 0, 0.45);
  --ok: #4fd39a;
  --warn: #ff8a65;
  --scrim: rgba(0, 0, 0, 0.52);
  --kbd-bg: rgba(255, 255, 255, 0.07);
  --kbd-ink: #bcc2cc;
  --seg-bg: rgba(255, 255, 255, 0.04);
  --code-bg: #0c0d10;
  --menu-bg: rgba(36, 38, 44, 0.88);
  --sheet-bg: rgba(30, 32, 37, 0.95);
}
html.has-pen { --hit: 44px; }
@media (pointer: coarse) { :root { --hit: 44px; } }

/* ---------- base ---------- */
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; background: var(--paper); }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.4;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}
input, textarea, select, [contenteditable="true"], [contenteditable=""],
.reading, .status, .css-box pre, .prompt-read, .selftest {
  -webkit-user-select: text;
  user-select: text;
  -webkit-touch-callout: default;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1, h2, h3, p { margin: 0; }
::selection { background: color-mix(in srgb, var(--accent) 34%, transparent); }
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--kbd-bg);
  color: var(--kbd-ink);
  font: 600 11px/1 var(--font-ui);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.btn-ico, .tab-ico { display: inline-grid; place-items: center; flex: 0 0 auto; }
.btn-ico svg, .tab-ico svg { width: 16px; height: 16px; }

/* ---------- app frame ---------- */
.app {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  grid-template-columns: minmax(0, 1fr);
  height: 100vh;
  height: 100dvh;
  min-height: 0;
}
.desks {
  min-width: 0;
  min-height: 0;
  display: grid;
  grid-template: minmax(0, 1fr) / minmax(0, 1fr);
}
.desks > .desk-view { grid-area: 1 / 1 !important; min-width: 0; min-height: 0; }

/* ---------- header ---------- */
.top {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  min-height: 60px;
  padding: max(8px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 8px max(16px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 0 0 auto; }
.mark { width: 30px; height: 30px; color: var(--brand); flex: 0 0 auto; }
.brand strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.15;
  letter-spacing: 0.18em;
  font-weight: 650;
}
.brand em {
  display: block;
  margin-top: 1px;
  font-style: normal;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}
.top-study {
  margin: 0 auto;
  min-width: 0;
  max-width: 30ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.top-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
  margin-left: auto;
  min-width: 0;
}
.search-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 196px;
  min-height: var(--hit);
  padding: 0 7px 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--field);
  color: var(--muted);
  text-align: left;
}
.search-btn:hover { border-color: var(--line-strong); color: var(--ink); }
.search-btn .search-label { flex: 1 1 auto; }
.save-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 4px;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.save-chip i { width: 7px; height: 7px; border-radius: 50%; background: var(--line-strong); flex: 0 0 auto; }
.save-chip.is-saved i { background: var(--ok); }
.save-chip.is-failed { color: var(--warn); }
.save-chip.is-failed i { background: var(--warn); }
.live {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 70%, transparent);
  animation: ping 1.8s ease-out infinite;
}
.icon-btn {
  display: inline-grid;
  place-items: center;
  min-width: var(--hit);
  height: var(--hit);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
}
.icon-btn:hover { background: var(--hover); border-color: var(--line-strong); }
.icon-btn[aria-pressed="true"], .icon-btn[aria-expanded="true"] { background: var(--raised); box-shadow: var(--shadow-1); }
.icon-btn svg { width: 18px; height: 18px; }
.project-btn { display: inline-flex; align-items: center; gap: 6px; padding: 0 13px 0 11px; }

/* ---------- segmented controls ---------- */
.seg { display: flex; padding: 3px; border-radius: 999px; gap: 2px; }
.seg button {
  border: 1px solid transparent;
  border-radius: 999px;
  min-height: calc(var(--hit) - 2px);
  padding: 0 14px;
  background: transparent;
  color: inherit;
}
.top .seg { background: var(--seg-bg); border: 1px solid var(--line); }
.top .seg button:hover { background: var(--hover); }
.top .seg button.is-on { background: var(--raised); color: var(--ink); box-shadow: var(--shadow-1); }
.desk-seg button { display: inline-flex; align-items: center; justify-content: center; gap: 7px; }
.desk-seg button .tab-ico { color: var(--muted); }
.desk-seg button.is-on .tab-ico { color: var(--brand); }

/* ---------- shared controls ---------- */
.section-label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin: 0 0 10px; }
.section-head .section-label { margin: 0; }
.group { margin-top: 14px; }
.group-label { margin: 0 0 8px; font-size: 12px; color: var(--muted); }
.row { display: flex; gap: 8px; margin-top: 10px; }
.row.wrap { flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: var(--hit);
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--raised);
  color: var(--ink);
  white-space: nowrap;
}
.btn:hover { border-color: var(--line-strong); }
.btn.ink { background: var(--inverse); color: var(--on-inverse); border-color: var(--inverse); }
.btn.ink:hover { box-shadow: var(--shadow-1); }
.btn.ink:active { transform: translateY(1px) scale(0.98); }
.btn.ghost { background: transparent; }
.btn.ghost:hover { background: var(--hover); }
textarea, select,
input[type="text"], input[type="search"], input[type="number"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--field);
  color: var(--ink);
  padding: 10px 12px;
}
textarea:hover, select:hover, input[type="text"]:hover, input[type="search"]:hover { border-color: var(--line-strong); }
textarea::placeholder, input::placeholder { color: var(--muted); opacity: 1; }
textarea { min-height: 118px; resize: vertical; line-height: 1.45; }
select {
  -webkit-appearance: none;
  appearance: none;
  min-height: 40px;
  padding-right: 34px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235e646e' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9.5l6 6 6-6'/></svg>");
  background-repeat: no-repeat;
  background-position: right 13px center;
  background-size: 12px;
}
html[data-theme="graphite"] select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ba1ab' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9.5l6 6 6-6'/></svg>");
}
select option { background: var(--paper-2); color: var(--ink); }
input[type="search"]::-webkit-search-cancel-button { -webkit-appearance: none; }
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  margin: 0;
  background: transparent;
  touch-action: pan-y;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--accent) var(--pct, 30%), var(--track) var(--pct, 30%));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -7.5px;
  border-radius: 50%;
  background: var(--thumb);
  border: 1px solid var(--thumb-line);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.14);
}
input[type="range"]::-moz-range-track { height: 3px; border-radius: 99px; background: var(--track); }
input[type="range"]::-moz-range-progress { height: 3px; border-radius: 99px; background: var(--accent); }
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--thumb);
  border: 1px solid var(--thumb-line);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.14);
}
input[type="range"]:focus-visible { outline: none; }
input[type="range"]:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--focus); outline-offset: 2px; }
input[type="range"]:focus-visible::-moz-range-thumb { outline: 2px solid var(--focus); outline-offset: 2px; }
@media (pointer: coarse) {
  input[type="range"] { height: 32px; }
  input[type="range"]::-webkit-slider-thumb { width: 26px; height: 26px; margin-top: -11.5px; }
  input[type="range"]::-moz-range-thumb { width: 26px; height: 26px; }
}

/* ---------- Motion desk layout ---------- */
#view-motion:not([hidden]) {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 360px;
}
.library {
  min-height: 0;
  padding: 16px 12px 16px max(14px, env(safe-area-inset-left));
  overflow: auto;
  border-right: 1px solid var(--line);
}
.lib {
  display: grid;
  grid-template-columns: 28px 52px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  width: 100%;
  margin: 0 0 4px;
  padding: 8px;
  border: 0;
  border-radius: 14px;
  background: transparent;
  color: inherit;
  text-align: left;
}
.lib:hover { background: var(--hover); }
.lib.is-on { background: var(--raised); box-shadow: var(--shadow-2); }
.lib-index { font-size: 11px; letter-spacing: 0.08em; color: var(--muted); font-variant-numeric: tabular-nums; }
.lib-words { min-width: 0; }
.lib strong { display: block; font-size: 14px; font-weight: 600; }
.lib small { display: block; margin-top: 2px; color: var(--muted); font-size: 12px; }
.lib-preview {
  position: relative;
  width: 52px;
  height: 34px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px var(--line);
}
.pv-nav { background: linear-gradient(180deg, #3148ad, #e15a36); }
.pv-nav::before, .pv-nav::after {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  width: 9px;
  border-radius: 6px;
}
.pv-nav::before { left: 12px; background: rgba(255, 255, 255, 0.8); }
.pv-nav::after { right: 12px; background: #16181e; }
.pv-button { background: linear-gradient(180deg, #f7f7f8, #dedee4); }
.pv-button::before {
  content: "";
  position: absolute;
  left: 8px; right: 8px; top: 9px;
  height: 16px;
  border-radius: 99px;
  background: linear-gradient(180deg, #fff, rgba(255, 255, 255, .35));
  box-shadow: 0 6px 10px rgba(20, 20, 30, 0.12), inset 0 1px 0 #fff;
}
.pv-icon { background: #d9dde6; }
.pv-icon::before {
  content: "";
  position: absolute;
  left: 15px; top: 4px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .75);
  box-shadow: inset 0 0 0 1.5px #1c2438;
}
.pv-pointer { background: #24345a; }
.pv-pointer::before {
  content: "";
  position: absolute;
  left: 18px; top: 10px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 5px rgba(255, 255, 255, .25);
}
.pv-weather { background: #eceae4; }
.pv-weather::before {
  content: "";
  position: absolute;
  left: 8px; top: 6px;
  width: 22px; height: 22px;
  border-radius: 5px;
  background: #1c1e24;
}
.pv-weather::after {
  content: "";
  position: absolute;
  left: 18px; top: 12px;
  width: 16px; height: 10px;
  border-radius: 8px;
  background: #fff;
}
.pv-glow { background: #12141a; }
.pv-glow::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 6px;
  box-shadow: inset 0 0 0 1.5px #19d3ee, 0 0 10px rgba(232, 160, 74, 0.8);
}
.pv-command { background: linear-gradient(180deg, #f4f7ff, #f3e9f1); }
.pv-command::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px;
  width: 14px; height: 8px;
  border-radius: 2px;
  background: #fff;
  box-shadow: 18px 0 0 #fff, 0 12px 0 #fff, 18px 12px 0 #fff;
}
.pv-dial { background: #eceae4; }
.pv-dial::before {
  content: "";
  position: absolute;
  left: 11px; top: 3px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: conic-gradient(#1c1e24 0 40deg, #c8c6c0 40deg 360deg);
  -webkit-mask: radial-gradient(circle, transparent 8px, #000 9px);
  mask: radial-gradient(circle, transparent 8px, #000 9px);
}

.stage-wrap {
  min-width: 0;
  min-height: 0;
  padding: 14px 12px max(14px, env(safe-area-inset-bottom)) 0;
}
.stage-frame {
  position: relative;
  height: 100%;
  border-radius: 28px;
  overflow: hidden;
  isolation: isolate;
  color: #fff;
  box-shadow: var(--shadow-2), 0 0 0 1px var(--line);
}
.atmosphere { position: absolute; inset: 0; }
.atmosphere[data-skin="horizon"] {
  background:
    radial-gradient(90% 50% at 50% -8%, rgba(255, 255, 255, .42), transparent 48%),
    linear-gradient(180deg, #243e9c 0%, #4c5cae 20%, #7c6da3 42%, #b06984 60%, #d85a52 78%, #e3532c 100%);
}
.atmosphere[data-skin="atelier"] {
  background:
    radial-gradient(48% 36% at 50% 40%, #fff, transparent 72%),
    linear-gradient(180deg, #f4f2ed, #e3dfd8);
}
.atmosphere[data-skin="void"] {
  background:
    radial-gradient(42% 32% at 50% 46%, rgba(36, 48, 70, 0.55), transparent 70%),
    #07080b;
}
.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.12;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}
.stage-frame[data-skin="atelier"] { color: #17181d; }

.slate {
  position: absolute;
  z-index: 2;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px 0;
  pointer-events: none;
}
.kicker {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.78;
}
#slate-title {
  margin-top: 4px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 560;
  letter-spacing: -0.03em;
}
.slate-readout {
  align-self: flex-start;
  padding-top: 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  opacity: 0.86;
  white-space: nowrap;
}

.specimen {
  position: absolute;
  z-index: 1;
  inset: 78px 28px 74px;
  display: grid;
  place-items: center;
}

.dock {
  position: absolute;
  z-index: 2;
  left: 16px; right: 16px; bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.dock > button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  min-height: var(--hit);
  padding: 0 14px 0 11px;
  background: rgba(255, 255, 255, 0.16);
  color: inherit;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.stage-frame .seg {
  background: rgba(0, 0, 0, 0.14);
  border: 1px solid rgba(255, 255, 255, .14);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.stage-frame .seg button {
  min-height: calc(var(--hit) - 2px);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: inherit;
}
.stage-frame .seg button.is-on { background: #fff; color: #17181d; border-color: #fff; }
.stage-frame[data-skin="atelier"] .dock > button,
.stage-frame[data-skin="atelier"] .seg button {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(23, 24, 29, 0.1);
  color: #17181d;
}
.stage-frame[data-skin="atelier"] .seg { background: rgba(255, 255, 255, .4); border-color: rgba(23, 24, 29, .08); }
.stage-frame[data-skin="atelier"] .seg button.is-on { background: #17181d; color: #f6f3ed; border-color: #17181d; }
.stage-frame :focus-visible { outline-color: #fff; }
.stage-frame[data-skin="atelier"] :focus-visible { outline-color: #0a7f95; }

/* ---------- bench ---------- */
.bench {
  min-height: 0;
  overflow: auto;
  padding: 16px max(16px, env(safe-area-inset-right)) 28px 16px;
  border-left: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel-wash), transparent 120px);
}
.bench > section + section { margin-top: 24px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 0 2px; }
.chips button {
  flex: 0 0 auto;
  min-height: 30px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--chip);
  color: var(--ink);
  font-size: 12px;
}
.chips button:hover { border-color: var(--line-strong); background: var(--raised); }
.reading { margin-top: 2px; color: var(--ink); font-size: 13px; }
.status { min-height: 1.2em; margin-top: 8px; color: var(--muted); font-size: 12px; }
.bench .group-label { margin-top: 14px; }
.bench .field { display: grid; gap: 6px; margin: 0 0 12px; }
.field-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  font-size: 12px;
}
.field-top span:last-child:not(:first-child) { color: var(--muted); font-variant-numeric: tabular-nums; }
.bench [data-show] { display: none; }
.bench[data-study="icon"] [data-show~="icon"],
.bench[data-study="nav"] [data-show~="nav"],
.bench[data-study="button"] [data-show~="button"],
.bench[data-study="command"] [data-show~="command"] { display: grid; }
.bench [data-show-easing] { display: none; }
.bench[data-easing="spring"] [data-show-easing~="spring"] { display: grid; }
.hint { margin: 4px 0 0; color: var(--muted); font-size: 12px; }

.curve-read { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; text-align: right; }
.curve {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--field);
  padding: 6px 8px 2px;
}
.curve svg { display: block; width: 100%; height: auto; overflow: visible; }
.curve-guide { stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 3 4; }
.curve-axis { fill: var(--muted); font: 600 9px var(--font-ui); }
.curve-area { fill: color-mix(in srgb, var(--accent) 16%, transparent); }
.curve-line { fill: none; stroke: var(--ink); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.curve-peak { fill: var(--ink); }
.curve-peak-line { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 2 3; opacity: 0.45; }
.curve-note { fill: var(--ink); font: 650 10px var(--font-ui); }
.curve-time { stroke: var(--accent); stroke-width: 1.4; opacity: 0; }
.curve-dot { fill: var(--accent); stroke: var(--ink); stroke-width: 1.5; }
.curve svg.is-playing .curve-time { opacity: 0.8; }

.css-box { margin-top: 12px; }
.css-box summary { cursor: pointer; color: var(--muted); font-size: 12px; padding: 4px 0; }
.css-box summary:hover { color: var(--ink); }
.css-box pre {
  margin: 8px 0 0;
  max-height: 260px;
  overflow: auto;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--code-bg);
  color: #efeae2;
  font: 11px/1.5 var(--font-mono);
  white-space: pre-wrap;
  word-break: break-word;
}
.colophon { margin-top: 12px; color: var(--muted); font-size: 12px; }
.selftest { display: none; white-space: pre-wrap; }
.selftest.is-on {
  display: block;
  position: fixed;
  right: 12px;
  bottom: 12px;
  z-index: 90;
  max-width: 360px;
  max-height: 60vh;
  overflow: auto;
  margin: 0;
  padding: 14px 16px;
  border-radius: 14px;
  background: #fff;
  color: #111;
  font: 12px/1.5 var(--font-mono);
  box-shadow: var(--shadow-3);
}

/* ---------- study: side rails ---------- */
.rails-shell {
  height: min(620px, 100%);
  max-height: 100%;
  display: flex;
  gap: 14px;
  padding: 12px;
  border-radius: 48px;
  background: rgba(255, 255, 255, calc(var(--glass) * 0.7));
  border: 1px solid rgba(255, 255, 255, .42);
  box-shadow: 0 30px 70px rgba(20, 10, 40, 0.16), inset 0 1px 0 rgba(255, 255, 255, .45);
  -webkit-backdrop-filter: blur(calc(var(--blur) * 0.4));
  backdrop-filter: blur(calc(var(--blur) * 0.4));
}
.rail {
  position: relative;
  width: 108px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-radius: 38px;
}
.rail-light {
  color: #1a2040;
  background: linear-gradient(180deg, rgba(255, 255, 255, .78), rgba(190, 202, 245, .48) 55%, rgba(130, 120, 205, .36));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .85), inset 0 -24px 36px rgba(70, 50, 150, .12);
}
.rail-dark {
  color: #f4f1ea;
  background: linear-gradient(180deg, #2a2d36, #0d0e13 72%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .18), inset 0 -30px 40px rgba(0, 0, 0, .45);
}
.rail-item {
  position: relative;
  z-index: 1;
  width: 72px;
  height: 64px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 24px;
  background: transparent;
  color: inherit;
}
.rail-item svg { width: 26px; height: 26px; transition: translate var(--dur) var(--ease), scale calc(var(--dur) * 0.5) var(--ease); }
.rail-light .rail-item.is-active { color: #fff; }
.rail-dark .rail-item.is-active { color: #17181d; }
.specimen[data-trigger="hover"] .rail-item:hover svg { translate: 0 calc(var(--travel) * -0.5); }
.specimen[data-trigger="press"] .rail-item.is-pressed svg { scale: var(--press); }
.well, .cap {
  position: absolute;
  left: 50%;
  top: 0;
  width: 68px;
  height: 68px;
  margin-left: -34px;
  border-radius: 50%;
  transition: transform var(--dur) var(--ease);
}
.rail:not(.is-ready) .well,
.rail:not(.is-ready) .cap { transition: none; }
.rail-light .well {
  background: rgba(255, 255, 255, .38);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .75), 0 10px 20px rgba(40, 30, 80, .12);
}
.rail-dark .well { background: #f4f1ea; }
.rail-light .cap { background: rgba(255, 255, 255, .42); }
.rail-dark .cap { background: rgba(255, 255, 255, .08); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08); }
.well.is-squash { animation: squash var(--dur) var(--ease); }
.specimen.is-loop .well { box-shadow: 0 0 0 1px rgba(255, 255, 255, .3), 0 0 24px color-mix(in srgb, var(--accent) calc(var(--glow) * 60%), transparent); }

/* ---------- study: glass button ---------- */
.glass-wrap { display: grid; justify-items: center; gap: 18px; }
.glass-btn {
  position: relative;
  min-width: 230px;
  height: 76px;
  padding: 0 36px;
  border-radius: calc(var(--radius) + 12px);
  border: 1px solid rgba(255, 255, 255, .72);
  background: linear-gradient(180deg, rgba(255, 255, 255, .7), rgba(255, 255, 255, .22) 46%, rgba(255, 255, 255, .08) 52%, rgba(255, 255, 255, .32));
  color: #243049;
  font-size: 22px;
  letter-spacing: -0.03em;
  box-shadow:
    0 18px 40px rgba(20, 16, 30, .18),
    inset 0 1px 0 rgba(255, 255, 255, .92),
    inset 0 -18px 30px color-mix(in srgb, var(--accent) calc(var(--glow) * 48%), transparent);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(1.35);
  backdrop-filter: blur(var(--blur)) saturate(1.35);
  overflow: hidden;
  transition: translate var(--dur) var(--ease), scale var(--dur) var(--ease), transform calc(var(--dur) * 0.6) var(--ease), box-shadow var(--dur) var(--ease);
}
.glass-btn::before {
  content: "";
  position: absolute;
  left: 12px; right: 12px; top: 3px;
  height: 42%;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .95), rgba(255, 255, 255, 0));
  pointer-events: none;
}
.glass-btn .sheen,
.sample .sheen {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 34%, rgba(255, 255, 255, .75) 50%, transparent 66%);
  transform: translateX(-130%);
  pointer-events: none;
}
.glass-btn .spec-light {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  pointer-events: none;
  background: radial-gradient(55% 90% at calc(50% + var(--px, 0) * 45%) calc(28% + var(--py, 0) * 40%), rgba(255, 255, 255, .8), transparent 62%);
  transition: opacity var(--dur) var(--ease);
}
.glass-label { position: relative; }
.specimen[data-trigger="hover"] .glass-btn:hover { translate: 0 calc(var(--travel) * -0.45); }
.specimen[data-trigger="hover"] .glass-btn:hover .sheen { animation: sheen calc(var(--dur) * 1.25) var(--ease); }
.specimen[data-trigger="press"] .glass-btn.is-pressed { scale: var(--press); transition-duration: calc(var(--dur) * 0.35); }
.specimen[data-trigger="pointer"] .glass-btn {
  transform: perspective(700px) rotateX(calc(var(--py, 0) * var(--tilt) * -1)) rotateY(calc(var(--px, 0) * var(--tilt)));
}
.specimen[data-trigger="pointer"] .glass-btn .spec-light { opacity: 1; }
.specimen.is-loop .glass-btn { animation: floaty calc(var(--dur) * 2.2) var(--ease) infinite; }
.specimen.is-loop .glass-btn .sheen { animation: sheen-loop calc(var(--dur) * 2.4) var(--ease) infinite; }
.specimen.is-replay .glass-btn { animation: squash var(--dur) var(--ease); }
.specimen.is-replay .glass-btn .sheen { animation: sheen calc(var(--dur) * 1.25) var(--ease); }
.notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin: 0; padding: 0; list-style: none; }
.notes li {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(0, 0, 0, .2);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.stage-frame[data-skin="atelier"] .notes li { background: rgba(255, 255, 255, .7); color: #17181d; }

/* ---------- study: icon well ---------- */
.icon-stage { display: grid; justify-items: center; gap: 22px; }
.icon-disc {
  position: relative;
  width: 132px;
  height: 132px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .45);
  background: rgba(255, 255, 255, var(--glass));
  color: inherit;
  box-shadow:
    0 16px 40px rgba(0, 0, 0, .16),
    inset 0 1px 0 rgba(255, 255, 255, .6),
    0 0 32px color-mix(in srgb, var(--accent) calc(var(--glow) * 55%), transparent);
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  transition: translate var(--dur) var(--ease), scale var(--dur) var(--ease), transform calc(var(--dur) * 0.6) var(--ease);
}
.disc-glyph { display: grid; place-items: center; transition: translate calc(var(--dur) * 0.6) var(--ease); }
.icon-disc svg { width: 42px; height: 42px; }
.icon-disc .ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0;
}
.specimen[data-trigger="hover"] .icon-disc:hover { translate: 0 calc(var(--travel) * -0.45); }
.specimen[data-trigger="hover"] .icon-disc:hover .ring { animation: ring var(--dur) var(--ease); }
.specimen[data-trigger="press"] .icon-disc.is-pressed { scale: var(--press); transition-duration: calc(var(--dur) * 0.35); }
.icon-disc.is-burst .ring { animation: ring var(--dur) var(--ease); }
.specimen[data-trigger="pointer"] .icon-disc {
  transform: perspective(600px) rotateX(calc(var(--py, 0) * var(--tilt) * -1.4)) rotateY(calc(var(--px, 0) * var(--tilt) * 1.4));
}
.specimen[data-trigger="pointer"] .icon-disc .disc-glyph { translate: calc(var(--px, 0) * 7px) calc(var(--py, 0) * 7px); }
.specimen.is-replay .icon-disc { animation: disc var(--dur) var(--ease); }
.specimen.is-replay .icon-disc .ring { animation: ring var(--dur) var(--ease); }
.specimen.is-loop .icon-disc { animation: floaty calc(var(--dur) * 2) var(--ease) infinite; }
.specimen.is-loop .icon-disc .ring { animation: ring calc(var(--dur) * 2) var(--ease) infinite; }
.icon-picker { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 320px; }
.icon-picker button {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .28);
  background: rgba(255, 255, 255, .12);
  color: inherit;
}
.stage-frame[data-skin="atelier"] .icon-picker button { border-color: rgba(23, 24, 29, .1); background: rgba(255, 255, 255, .7); }
.icon-picker button.is-on { background: #fff; color: #17181d; box-shadow: 0 0 0 2px var(--accent); }
.icon-picker svg { width: 18px; height: 18px; }

/* ---------- study: magnetic pointer ---------- */
.pointer-field {
  position: relative;
  width: min(560px, 100%);
  height: min(420px, 100%);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-content: center;
  justify-items: center;
}
.specimen[data-trigger="pointer"] .pointer-field,
.specimen[data-trigger="pointer"] .pointer-field * { cursor: none; }
.target {
  width: min(180px, 100%);
  height: 92px;
  border-radius: calc(var(--radius) * 0.6);
  border: 1px solid rgba(255, 255, 255, .32);
  background: rgba(255, 255, 255, calc(var(--glass) * 0.8));
  color: inherit;
  -webkit-backdrop-filter: blur(var(--blur));
  backdrop-filter: blur(var(--blur));
  display: grid;
  place-items: center;
  gap: 4px;
  transition: translate var(--dur) var(--ease), scale var(--dur) var(--ease);
}
.target svg { width: 22px; height: 22px; }
.target span { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.target.is-near,
.specimen[data-trigger="hover"] .target:hover { translate: 0 calc(var(--travel) * -0.35); scale: 1.04; }
.specimen[data-trigger="press"] .target.is-pressed { scale: var(--press); transition-duration: calc(var(--dur) * 0.35); }
.cursor {
  position: absolute;
  left: 0; top: 0;
  width: 22px; height: 22px;
  margin: -11px 0 0 -11px;
  pointer-events: none;
  z-index: 3;
  transition: opacity 200ms ease;
}
.specimen:not([data-trigger="pointer"]):not([data-trigger="loop"]):not(.is-touring) .cursor { opacity: 0; }
.cursor i {
  display: block;
  width: 8px; height: 8px;
  margin: 7px auto;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .3), 0 0 16px var(--accent);
}
.stage-frame[data-skin="atelier"] .cursor i { background: #17181d; box-shadow: 0 0 0 6px rgba(255, 255, 255, .7); }
.cursor b {
  position: absolute;
  inset: -7px;
  border-radius: 50%;
  border: 1px solid currentColor;
  opacity: 0.7;
}
.ripple {
  position: absolute;
  width: 14px; height: 14px;
  margin: -7px 0 0 -7px;
  border-radius: 50%;
  border: 1px solid currentColor;
  pointer-events: none;
  animation: ring 640ms var(--ease) forwards;
}

/* ---------- study: harbor card ---------- */
.weather-set { position: relative; width: min(420px, 100%); height: min(520px, 100%); perspective: 900px; }
.stack {
  position: absolute;
  inset: 0 0 92px 0;
  transform-style: preserve-3d;
  transition: transform var(--dur) var(--ease), translate var(--dur) var(--ease), scale var(--dur) var(--ease);
}
.specimen[data-trigger="hover"] .stack:hover { translate: 0 calc(var(--travel) * -0.5); }
.specimen[data-trigger="hover"] .stack:hover .cloud i { animation-duration: calc(var(--dur) * 3); }
.specimen[data-trigger="press"] .stack.is-pressed { scale: var(--press); transition-duration: calc(var(--dur) * 0.35); }
.wx.is-away .cloud,
.wx.is-away .temp-row { opacity: 0; transform: translateY(-8px); }
.wx .cloud, .wx .temp-row { transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease); }
.wx {
  position: absolute;
  left: 8px; top: 8px;
  width: 250px;
  min-height: 250px;
  padding: 16px 16px 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, #2a2d34, #14161b);
  color: #f4f1ea;
  box-shadow: 0 24px 50px rgba(0, 0, 0, .22);
  overflow: hidden;
}
.wx-top { display: flex; justify-content: space-between; align-items: flex-start; }
.city { font-size: 18px; font-weight: 600; }
.region, .wx-date, .forecast small { opacity: 0.7; font-size: 12px; }
.x {
  width: 32px; height: 32px;
  border: 0; border-radius: 50%;
  background: transparent;
  color: inherit;
  opacity: 0.75;
  font-size: 18px;
}
.cloud { position: relative; height: 74px; margin-top: 6px; }
.cloud i {
  position: absolute;
  background: #fff;
  border-radius: 50%;
  animation: drift calc(var(--dur) * 8) ease-in-out infinite;
}
.cloud i:nth-child(1) { width: 74px; height: 46px; left: 8px; top: 22px; }
.cloud i:nth-child(2) { width: 96px; height: 58px; left: 42px; top: 8px; animation-delay: -1.4s; }
.cloud i:nth-child(3) { width: 54px; height: 36px; left: 112px; top: 26px; animation-delay: -2.2s; }
.cloud.is-boost i { animation-name: drift-fast; animation-duration: calc(var(--dur) * 1.4); }
.temp-row { display: flex; align-items: flex-start; gap: 4px; margin-top: 8px; }
.temp { font-family: var(--font-num); font-size: 72px; line-height: 0.8; font-weight: 340; letter-spacing: -0.05em; }
.unit { margin-top: 8px; opacity: 0.7; }
.wx-date { margin-left: auto; align-self: flex-end; padding-bottom: 8px; font-variant-numeric: tabular-nums; }
.forecast {
  position: absolute;
  left: 92px; top: 228px;
  width: 270px;
  padding: 14px 14px 12px;
  border-radius: 16px;
  background: rgba(236, 234, 228, 0.94);
  color: #17181d;
  box-shadow: 0 16px 30px rgba(0, 0, 0, .12);
}
.forecast header { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 12px; }
.days { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; text-align: center; }
.days strong { display: block; font-size: 13px; font-weight: 600; }
.days span { font-size: 11px; color: #4c525b; }
.keys {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  display: flex;
  justify-content: center;
  gap: 28px;
}
.key {
  width: 64px;
  border: 0;
  background: transparent;
  color: inherit;
  display: grid;
  justify-items: center;
  gap: 8px;
}
.key i {
  width: 54px; height: 54px;
  border-radius: 50%;
  background: linear-gradient(180deg, #fff, #e4e1da);
  box-shadow: 0 8px 0 #1a1a1a, 0 14px 18px rgba(0, 0, 0, .22);
  transition: transform 90ms linear, box-shadow 90ms linear;
}
.key:active i { transform: translateY(6px); box-shadow: 0 2px 0 #1a1a1a, 0 6px 10px rgba(0, 0, 0, .2); }
.key span { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; }
.stack.is-nod { animation: nod var(--dur) var(--ease); }

/* ---------- study: edge light ---------- */
.tile {
  position: relative;
  width: min(420px, 92%);
  aspect-ratio: 1;
  border-radius: calc(var(--radius) + 10px);
  transition: translate var(--dur) var(--ease), scale var(--dur) var(--ease);
}
.halo {
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: conic-gradient(from 0deg, transparent 0 58%, var(--accent) 72%, transparent 82%, #e8a04a 91%, transparent 100%);
  filter: blur(calc(6px + var(--glow) * 16px));
  opacity: calc(0.35 + var(--glow) * 0.65);
  transition: rotate var(--dur) var(--ease), opacity var(--dur) var(--ease), filter var(--dur) var(--ease);
}
.face {
  position: absolute;
  inset: 3px;
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(80% 50% at 50% 0%, rgba(255, 255, 255, .05), transparent 46%),
    linear-gradient(180deg, #23262e, #0c0d11 64%);
  color: #f6f3ed;
  overflow: hidden;
}
.face .mark {
  position: absolute;
  left: 50%;
  top: 40%;
  width: 132px;
  height: 132px;
  transform: translate(-50%, -50%);
  color: rgba(255, 255, 255, .88);
}
.face .copy { position: absolute; left: 28px; right: 28px; bottom: 26px; }
.face h2 { font-family: var(--font-display); font-size: 20px; font-weight: 580; letter-spacing: -0.03em; }
.face p { margin-top: 6px; max-width: 34ch; color: rgba(246, 243, 237, .72); font-size: 13px; }
.specimen[data-trigger="hover"] .tile:hover { translate: 0 calc(var(--travel) * -0.4); }
.specimen[data-trigger="hover"] .tile:hover .halo { opacity: 1; }
.specimen[data-trigger="press"] .tile.is-pressed { scale: var(--press); transition-duration: calc(var(--dur) * 0.35); }
.specimen[data-trigger="press"] .tile.is-pressed .halo { opacity: 1; filter: blur(calc(4px + var(--glow) * 10px)) brightness(1.35); }
.specimen[data-trigger="pointer"] .halo { rotate: var(--ang, 0deg); opacity: 1; }
.specimen.is-loop .halo { animation: spin calc(var(--dur) * 14) linear infinite; }
.specimen.is-replay .halo { animation: spin-once calc(var(--dur) * 1.6) var(--ease); }

/* ---------- study: command field ---------- */
.command {
  width: min(680px, 100%);
  padding: 22px;
  border-radius: calc(var(--radius) * 0.8);
  background: linear-gradient(180deg, rgba(255, 255, 255, .9), rgba(255, 255, 255, .74));
  color: #17181d;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .16);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}
.command-head { display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.command h2 { font-family: var(--font-display); font-size: 28px; font-weight: 500; letter-spacing: -0.04em; }
.command .sub { margin-top: 4px; color: #545a63; font-size: 13px; }
.sample {
  position: relative;
  overflow: hidden;
  flex: 0 0 auto;
  min-width: 112px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  background: #17181d;
  color: #fff;
  transition: translate var(--dur) var(--ease), scale calc(var(--dur) * 0.5) var(--ease), transform calc(var(--dur) * 0.6) var(--ease), box-shadow var(--dur) var(--ease);
}
.sample-label { position: relative; }
.sample .sheen { background: linear-gradient(105deg, transparent 30%, rgba(255, 255, 255, .45) 50%, transparent 70%); }
.sample.m-glow { box-shadow: 0 0 24px color-mix(in srgb, var(--accent) calc(var(--glow) * 80%), transparent); }
.sample.m-lift.is-run, .sample.m-stagger.is-run { animation: lift var(--dur) var(--ease); }
.sample.m-sheen.is-run .sheen { animation: sheen var(--dur) var(--ease); }
.sample.m-squash.is-run { animation: squash var(--dur) var(--ease); }
.sample.m-glow.is-run { animation: glowpulse var(--dur) var(--ease); }
.sample.m-float.is-run { animation: floaty calc(var(--dur) * 1.6) var(--ease); }
.specimen.is-loop .sample.m-lift,
.specimen.is-loop .sample.m-stagger { animation: lift calc(var(--dur) * 1.8) var(--ease) infinite; }
.specimen.is-loop .sample.m-sheen .sheen { animation: sheen-loop calc(var(--dur) * 2.4) var(--ease) infinite; }
.specimen.is-loop .sample.m-squash { animation: squash calc(var(--dur) * 1.8) var(--ease) infinite; }
.specimen.is-loop .sample.m-glow { animation: glowpulse calc(var(--dur) * 1.8) var(--ease) infinite; }
.specimen.is-loop .sample.m-float { animation: floaty calc(var(--dur) * 1.8) var(--ease) infinite; }
.specimen[data-trigger="press"] .sample.is-pressed { scale: var(--press); }
.specimen[data-trigger="pointer"] .sample {
  transform: perspective(500px) rotateX(calc(var(--py, 0) * var(--tilt) * -1.6)) rotateY(calc(var(--px, 0) * var(--tilt) * 1.6));
}
.tile-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 18px; }
.motion-tile {
  min-height: 86px;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid rgba(23, 24, 29, .08);
  background: rgba(255, 255, 255, .76);
  color: #17181d;
  text-align: left;
  transition: translate var(--dur) var(--ease), background var(--dur) var(--ease);
}
.motion-tile strong { display: block; font-size: 14px; }
.motion-tile span { display: block; margin-top: 6px; color: #545a63; font-size: 12px; }
.motion-tile:hover { translate: 0 calc(var(--travel) * -0.35); }
.motion-tile.is-on { background: #17181d; color: #fff; }
.motion-tile.is-on span { color: rgba(255, 255, 255, .74); }
.specimen.is-replay .motion-tile,
.tile-grid.is-run .motion-tile { animation: rise var(--dur) var(--ease) both; animation-delay: calc(var(--i) * 60ms); }
.command :focus-visible { outline-color: #0a7f95; }

/* ---------- study: radial navigator ---------- */
.dial {
  position: relative;
  width: min(360px, 86vw, 100%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, #2a2d34, #101114 70%);
  box-shadow: 0 30px 60px rgba(0, 0, 0, .28), inset 0 1px 0 rgba(255, 255, 255, .12);
  color: #f4f1ea;
}
.dial-rotor {
  position: absolute;
  inset: 16px;
  border-radius: 50%;
  background: conic-gradient(from -30deg, rgba(255, 255, 255, .34) 0 60deg, transparent 0);
  -webkit-mask: radial-gradient(circle, transparent 54%, #000 55% 78%, transparent 79%);
  mask: radial-gradient(circle, transparent 54%, #000 55% 78%, transparent 79%);
  transition: rotate var(--dur) var(--ease);
}
.dial:not(.is-ready) .dial-rotor { transition: none; }
.dial-rotor.is-squash { animation: squash var(--dur) var(--ease); }
.dial-core {
  position: absolute;
  left: 50%; top: 50%;
  width: 46%; height: 46%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: #0c0d11;
  display: grid;
  place-items: center;
  align-content: center;
  text-align: center;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .05);
}
.dial-core strong { letter-spacing: 0.16em; font-size: 12px; font-weight: 600; }
.dial-core em { margin-top: 4px; font-style: normal; font-size: 12px; opacity: 0.72; }
.dial-item {
  position: absolute;
  left: 50%; top: 50%;
  width: 48px; height: 48px;
  margin: -24px 0 0 -24px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: rgba(244, 241, 234, .72);
  transition: scale var(--dur) var(--ease), color var(--dur) var(--ease);
}
.dial-item svg { width: 20px; height: 20px; }
.dial-item.is-on { color: #fff; }
.specimen[data-trigger="hover"] .dial-item:hover,
.dial-item.is-near { scale: 1.16; color: #fff; }
.specimen[data-trigger="press"] .dial-item.is-pressed { scale: var(--press); }

/* ---------- keyframes ---------- */
@keyframes sheen { from { transform: translateX(-130%); } to { transform: translateX(130%); } }
@keyframes sheen-loop { 0% { transform: translateX(-130%); } 55%, 100% { transform: translateX(130%); } }
@keyframes lift { 0%, 100% { translate: 0 0; } 50% { translate: 0 calc(var(--travel) * -1); } }
@keyframes rise { from { opacity: 0; translate: 0 10px; } to { opacity: 1; translate: 0 0; } }
@keyframes squash { 0%, 100% { scale: 1; } 45% { scale: var(--press); } }
@keyframes floaty { 0%, 100% { translate: 0 0; } 50% { translate: 0 calc(var(--travel) * -0.7); } }
@keyframes drift { 0%, 100% { transform: translate3d(0, 0, 0); } 50% { transform: translate3d(10px, -6px, 0); } }
@keyframes drift-fast { 0% { transform: translate3d(0, 0, 0); } 45% { transform: translate3d(26px, -14px, 0); } 100% { transform: translate3d(0, 0, 0); } }
@keyframes disc { 0% { scale: 0.94; } 55% { scale: 1.05; } 100% { scale: 1; } }
@keyframes ring { from { scale: 0.72; opacity: 0.75; } to { scale: 1.45; opacity: 0; } }
@keyframes spin { from { rotate: 0deg; } to { rotate: 360deg; } }
@keyframes spin-once { from { rotate: -360deg; } to { rotate: 0deg; } }
@keyframes glowpulse {
  0%, 100% { box-shadow: 0 0 0 color-mix(in srgb, var(--accent) 0%, transparent); }
  50% { box-shadow: 0 0 28px color-mix(in srgb, var(--accent) calc(var(--glow) * 85%), transparent); }
}
@keyframes nod { 0% { rotate: x 8deg; } 100% { rotate: x 0deg; } }
@keyframes ping {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 65%, transparent); }
  100% { box-shadow: 0 0 0 8px transparent; }
}

html.motion-off .specimen *, html.motion-off .elem-canvas *,
html.motion-off .specimen *::before,
html.motion-off .specimen *::after,
html.motion-off .live-dot {
  animation: none !important;
  transition: none !important;
}

/* ---------- responsive ---------- */
@media (max-width: 1500px) {
  .top-study, .live { display: none; }
}
@media (max-width: 1280px) {
  .desk-seg .tab-ico { display: none; }
  .search-btn { min-width: 0; padding: 0; width: var(--hit); justify-content: center; }
  .search-btn .search-label, .search-btn kbd { display: none; }
  .save-chip span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .project-btn { padding: 0; width: var(--hit); justify-content: center; }
  .project-btn .project-label { display: none; }
}
@media (max-width: 1100px) {
  #view-motion:not([hidden]) { display: block; overflow: auto; -webkit-overflow-scrolling: touch; }
  .library {
    display: flex;
    gap: 8px;
    align-items: center;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 10px max(12px, env(safe-area-inset-left));
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .library .section-label { flex: 0 0 auto; margin: 0 6px 0 0; }
  #library { display: flex; gap: 6px; }
  .lib { min-width: 214px; margin: 0; }
  .stage-wrap { height: min(70dvh, 680px); min-height: 460px; padding: 12px; }
  .bench { overflow: visible; border-left: 0; border-top: 1px solid var(--line); padding: 18px max(16px, env(safe-area-inset-right)) max(28px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left)); }
  .bench > section { max-width: 760px; }
  .specimen { inset: 64px 12px 74px; overflow: hidden; }
  .dock { flex-wrap: wrap; justify-content: center; row-gap: 8px; }
  .tile-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .top { gap: 8px 10px; padding-left: max(12px, env(safe-area-inset-left)); padding-right: max(12px, env(safe-area-inset-right)); }
  .brand { order: 1; flex: 1 1 auto; }
  .top-tools { order: 2; margin-left: 0; gap: 6px; }
  .desk-seg { order: 3; flex: 1 1 100%; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .desk-seg button { padding: 0 4px; min-width: 0; }
  .skin-seg { order: 4; flex: 1 1 100%; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .skin-seg button { padding: 0 4px; }
  .top-tools { display: contents; }
  .search-btn, .save-chip, .icon-btn { order: 2; }
  .slate { flex-direction: column; gap: 2px; padding: 16px 16px 0; }
  .slate-readout { white-space: normal; }
  .specimen { top: 96px; bottom: 132px; }
  .rails-shell { height: 392px; scale: 0.86; }
  .weather-set { height: 520px; scale: 0.74; transform-origin: 50% 0; }
  .command { padding: 16px; }
  .command h2 { font-size: 22px; }
  .command .sub { display: none; }
  .tile-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin-top: 14px; }
  .motion-tile { min-height: 64px; padding: 10px; }
  .motion-tile span { display: none; }
  .pointer-field { gap: 12px; }
  .target { height: 76px; }
  #fullscreen { display: none; }
  .dock {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    left: 14px;
    right: 14px;
    bottom: 12px;
  }
  #replay { grid-column: 1; grid-row: 2; width: 100%; justify-content: center; }
  #motion-toggle { grid-column: 2; grid-row: 2; width: 100%; justify-content: center; }
  .dock .seg { grid-column: 1 / -1; grid-row: 1; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); width: 100%; }
  .dock .seg button, .dock > button { padding: 0 6px; min-width: 0; }
  .stage-wrap { height: min(76dvh, 640px); min-height: 520px; }
}
@media (max-width: 420px) {
  .brand em { display: none; }
  .brand strong { letter-spacing: 0.12em; }
  .save-chip { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html:not(.motion-on) *, html:not(.motion-on) *::before, html:not(.motion-on) *::after {
    animation: none !important;
    transition: none !important;
  }
}