/* Amplan — warm graphite instrument panel with a copper/amber accent.
   Both themes are defined as the same token set, so components never branch on
   theme: only these variables change. */

:root, [data-theme="dark"] {
  color-scheme: dark;

  --bg: #171613;
  --surface: #1e1d1a;
  --surface-2: #262420;
  --elevated: #2e2c27;

  --ink: #f2eee6;
  --ink-soft: #a09889;
  --ink-faint: #6d665c;

  --line: #34312b;
  --line-soft: #2a2823;

  --primary: #c8683c;
  --primary-hi: #e08048;
  --primary-ink: #14130f;
  --accent: #d9a441;
  --focus-ring: color-mix(in srgb, var(--primary) 22%, transparent);

  --ok: #6fae7d;
  --warn: #d9a441;
  --bad: #d1553f;

  --bminus: #d1553f;
  --bplus: #6fae7d;
  --series: #d9a066;
  --weld: #b0392a;
  --holder: #2b2b2b;

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --topbar-h: 60px;

  /* Controls panel: wide (default) uses half the page; compact is the narrow mode. */
  --sidebar-w: 50%;
  --lattice-max-h: min(420px, 46vh);

  --viewport-bg: #1c1b18;
  --grid-line: #8a7f6c;
  --viewcube-face: #f3ece0;
  --viewcube-edge: #b9ac97;
  --viewcube-ink: #3a352f;
}

[data-theme="light"] {
  color-scheme: light;

  --bg: #f4f1ea;
  --surface: #fffdf8;
  --surface-2: #eae5da;
  --elevated: #e1dbcd;

  --ink: #23211c;
  --ink-soft: #5d564a;
  --ink-faint: #8c8375;

  --line: #d6cfc0;
  --line-soft: #e3ddd0;

  --primary: #b05628;
  --primary-hi: #97481f;
  --primary-ink: #fffdf8;
  --accent: #a5761c;
  --focus-ring: color-mix(in srgb, var(--primary) 20%, transparent);

  --ok: #3d7a4d;
  --warn: #97701a;
  --bad: #b23c26;

  --bminus: #b23c26;
  --bplus: #3d7a4d;
  --series: #a5761c;
  --weld: #9a3020;
  --holder: #3a352f;

  --shadow: 0 8px 24px rgba(70, 60, 45, 0.14);

  --viewport-bg: #e8e3d8;
  --grid-line: #b3a892;
  --viewcube-face: #fffdf8;
  --viewcube-edge: #c4b9a4;
  --viewcube-ink: #23211c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ------------------------------------------------------------------ icons */

.icon {
  width: 16px;
  height: 16px;
  flex: none;
  display: block;
}
.icon-sm { width: 14px; height: 14px; }
.icon-lg { width: 18px; height: 18px; }

.btn-with-icon,
.summary-with-icon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.group > summary .section-icon {
  width: 15px;
  height: 15px;
  flex: none;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------------ focus */

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
button:focus-visible,
summary:focus-visible,
.link-btn:focus-visible,
.fit-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ------------------------------------------------------------------ topbar */

.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
/* On the tools, the brand doubles as the way back to the landing page. */
a.brand { text-decoration: none; color: inherit; border-radius: 9px; }
a.brand:hover h1 { color: var(--primary); }
a.brand:hover .logo { background: var(--primary-hi); }
a.brand:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.brand .logo {
  width: 32px; height: 32px; border-radius: 8px;
  display: grid; place-items: center; flex: none;
  background: var(--primary); color: var(--primary-ink);
  text-decoration: none;
}
.brand .logo svg { width: 22px; height: 22px; display: block; }
.brand a.logo:hover { background: var(--primary-hi); }
.brand h1 {
  margin: 0; font-size: 15px; font-weight: 650; letter-spacing: 0.02em;
}
.brand p {
  margin: 0; font-size: 11px; color: var(--ink-faint);
  text-transform: uppercase; letter-spacing: 0.1em;
}

.topbar-right { display: flex; align-items: center; gap: 16px; min-width: 0; }

.theme-btn {
  display: flex; align-items: center; gap: 8px; flex: none;
  padding: 6px 12px;
  font: inherit; font-size: 12px; color: var(--ink-soft);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}
.theme-btn:hover { color: var(--ink); border-color: var(--ink-faint); }
.theme-btn .theme-icon { width: 16px; height: 16px; flex: none; overflow: visible; }

.theme-icon g {
  transform-box: fill-box; transform-origin: center;
  transition: opacity 180ms ease, transform 260ms cubic-bezier(0.34, 1.3, 0.64, 1);
}
.theme-icon .i-sun { opacity: 1; }
.theme-icon .i-moon { opacity: 0; transform: rotate(-70deg) scale(0.5); }
[data-theme="light"] .theme-icon .i-sun { opacity: 0; transform: rotate(70deg) scale(0.5); }
[data-theme="light"] .theme-icon .i-moon { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .theme-icon g { transition: none; }
}
.theme-btn .theme-label { font-variant-numeric: tabular-nums; letter-spacing: 0.04em; }

.pack-summary { display: flex; gap: 4px; flex-wrap: wrap; }
.pack-summary .kpi {
  display: flex; flex-direction: column; gap: 2px;
  padding: 4px 14px;
  border-left: 1px solid var(--line);
}
.pack-summary .kpi:first-child { border-left: none; }
.pack-summary .kpi span {
  font-size: 10px; color: var(--ink-faint);
  text-transform: uppercase; letter-spacing: 0.09em;
}
.pack-summary .kpi b {
  font-family: var(--mono); font-size: 15px; font-weight: 600;
  color: var(--ink); font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------------ layout */

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: calc(100vh - var(--topbar-h));
  position: relative;
}

.panel.controls {
  position: relative;
  background: var(--surface);
  border-right: none;
  padding: 16px 18px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.panel.controls::-webkit-scrollbar { width: 9px; }
.panel.controls::-webkit-scrollbar-thumb {
  background: var(--line); border-radius: 9px; border: 3px solid var(--surface);
}

/* -------------------------------------------------- sidebar width settings */

[data-sidebar="wide"] {
  --sidebar-w: 50%;
  --lattice-max-h: min(420px, 46vh);
}

[data-sidebar="compact"] {
  --sidebar-w: min(336px, 92vw);
  --lattice-max-h: 220px;
}
[data-sidebar="compact"] .panel.controls { padding: 14px; }

/* Splitter handle centred on the panel/viewport seam. */
.sidebar-edge-toggle {
  position: fixed;
  z-index: 8;
  top: calc(var(--topbar-h) + (100vh - var(--topbar-h)) * 0.5);
  left: var(--sidebar-w);
  transform: translate(-50%, -50%);
  width: 14px;
  height: 56px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 0 7px 7px 0;
  border-left-color: color-mix(in srgb, var(--line) 70%, transparent);
  background: color-mix(in srgb, var(--surface) 92%, var(--elevated));
  color: var(--ink-faint);
  cursor: pointer;
  box-shadow: 1px 0 0 color-mix(in srgb, var(--line-soft) 80%, transparent);
  transition: color 0.15s, background 0.15s, border-color 0.15s, left 0.2s ease;
}
.sidebar-edge-toggle:hover {
  color: var(--ink);
  background: var(--elevated);
  border-color: var(--ink-faint);
}
.sidebar-edge-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.sidebar-edge-toggle svg {
  width: 14px;
  height: 14px;
}

/* A grid cell is only as wide as its widest child unless min-width is cleared,
   so a long select label would otherwise push the column and clip its sibling. */
.grid-2 > *, .grid-3 > * { min-width: 0; }
input[type="number"], select { min-width: 0; }

/* Text that sits opposite a label in a space-between row needs somewhere to
   shrink to, or the two collide. */
.layout-suggestions .layout-opt .layout-meta,
.cc-candidates .cc-candidate-opt .cc-meta {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.layout-suggestions .layout-opt .layout-dims,
.cc-candidates .cc-candidate-opt .cc-label {
  flex: none;
}

/* Wide mode keeps variant rows on one line; compact stacks them. */
.layout-suggestions .layout-opt,
.cc-candidates .cc-candidate-opt {
  flex-wrap: nowrap;
}
[data-sidebar="compact"] .layout-suggestions .layout-opt,
[data-sidebar="compact"] .cc-candidates .cc-candidate-opt {
  flex-wrap: wrap;
}

.layout-lattice-wrap { max-height: var(--lattice-max-h); }

/* Wide mode has room for the toolbar on one row; compact stacks it. */
.pack-layout-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}
[data-sidebar="compact"] .pack-layout-toolbar {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.check-row {
  flex-direction: row;
  align-items: flex-start;
  gap: 8px;
  text-transform: none;
  letter-spacing: 0;
  font-size: 11.5px;
  color: var(--ink-soft);
  cursor: pointer;
}
.check-row input[type="checkbox"] {
  flex: none;
  width: 15px;
  height: 15px;
  margin-top: 1px;
  accent-color: var(--primary);
  cursor: pointer;
}
.check-row .hint-inline {
  display: block;
  margin-top: 2px;
  font-size: 10.5px;
  line-height: 1.45;
  color: var(--ink-faint);
}

/* Splitter chevron: collapse (←) when wide, expand (→) when compact. */
.sidebar-icon { fill: none; stroke: currentColor; stroke-width: 2; }
[data-sidebar="wide"] .sidebar-icon .i-collapse { display: inline; }
[data-sidebar="wide"] .sidebar-icon .i-expand { display: none; }
[data-sidebar="compact"] .sidebar-icon .i-collapse { display: none; }
[data-sidebar="compact"] .sidebar-icon .i-expand { display: inline; }

/* --------------------------------------------------- collapsible sections */

.group {
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: var(--surface-2);
  margin-bottom: 10px;
  overflow: hidden;
}
.group > summary {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 13px;
  font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.group > summary::-webkit-details-marker { display: none; }
.group > summary:hover { background: var(--elevated); }
.group > summary .idx {
  font-family: var(--mono); font-size: 10px; font-weight: 500;
  color: var(--ink-faint); letter-spacing: 0;
}
.group > summary .chev, .subgroup > summary .chev {
  margin-left: auto; width: 7px; height: 7px; flex: none;
  border-right: 1.5px solid var(--ink-faint);
  border-bottom: 1.5px solid var(--ink-faint);
  transform: rotate(45deg);
  transition: transform 0.18s ease;
}
.group[open] > summary .chev, .subgroup[open] > summary .chev { transform: rotate(-135deg); }
.group[open] > summary { border-bottom: 1px solid var(--line-soft); }

.group-body {
  display: flex; flex-direction: column; gap: 11px;
  padding: 13px;
}
.group-body h3 {
  margin: 3px 0 -2px;
  font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--ink-faint);
}

/* ------------------------------------------------------------------ inputs */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }

label {
  display: flex; flex-direction: column; gap: 5px;
  font-size: 11px; color: var(--ink-soft);
  text-transform: uppercase; letter-spacing: 0.07em;
}
label .u {
  color: var(--ink-faint); text-transform: none; letter-spacing: 0;
}

input[type="number"], select {
  width: 100%;
  min-height: 36px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  text-transform: none; letter-spacing: 0;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

select {
  appearance: none;
  cursor: pointer;
  padding-right: 32px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236d665c' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 12px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}
[data-theme="light"] select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238c8375' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}
select option, select optgroup {
  background: var(--surface);
  color: var(--ink);
}

input[type="number"]:hover:not(:disabled), select:hover:not(:disabled) {
  border-color: var(--ink-faint);
}
input[type="number"]:focus, select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--focus-ring);
}
input[type="number"][aria-invalid="true"] {
  border-color: var(--bad);
  background: color-mix(in srgb, var(--bad) 7%, var(--surface));
}
input[type="number"][aria-invalid="true"]:focus {
  border-color: var(--bad);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--bad) 20%, transparent);
}
input[type="number"]:disabled, select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ------------------------------------------------ visual terminal location */

.terminal-picker {
  min-width: 0;
  margin: 2px 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg);
}
.terminal-picker legend {
  padding: 0 6px;
  color: var(--ink-soft);
  font-size: 10.5px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.terminal-toolbar {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 7px;
}
.polarity-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line-soft);
  border-radius: 7px;
  background: var(--surface-2);
}
.polarity-toggle button {
  padding: 6px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--ink-faint);
  font: 700 11px var(--mono);
  cursor: pointer;
}
.polarity-toggle button[data-terminal="minus"][aria-selected="true"] {
  border-color: var(--bminus);
  background: color-mix(in srgb, var(--bminus) 13%, var(--elevated));
  color: var(--bminus);
}
.polarity-toggle button[data-terminal="plus"][aria-selected="true"] {
  border-color: var(--bplus);
  background: color-mix(in srgb, var(--bplus) 13%, var(--elevated));
  color: var(--bplus);
}

.face-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line-soft);
  border-radius: 7px;
  background: var(--surface-2);
}
.face-toggle button {
  padding: 6px 5px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--ink-faint);
  font: inherit;
  font-size: 10.5px;
  font-weight: 600;
  cursor: pointer;
}
.face-toggle button:hover { color: var(--ink); }
.face-toggle button[aria-pressed="true"] {
  border-color: var(--line);
  background: var(--elevated);
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.terminal-map {
  position: relative;
  height: 126px;
  margin-top: 9px;
  border-radius: 8px;
  background:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 12px 12px;
  overflow: hidden;
}
.terminal-pack {
  position: absolute;
  inset: 23px 28px;
  border: 1px solid var(--ink-faint);
  border-radius: 5px;
  background:
    radial-gradient(circle, var(--ink-faint) 0 2px, transparent 2.5px)
    8px 8px / 18px 18px,
    var(--surface-2);
  box-shadow: inset 0 0 0 3px color-mix(in srgb, var(--surface-2) 72%, transparent);
}
.terminal-pack-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  pointer-events: none;
}
.terminal-orientation {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  color: var(--ink-faint);
  font-size: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.terminal-rear { top: -18px; }
.terminal-front { bottom: -18px; }

.terminal-anchor {
  position: absolute;
  left: var(--terminal-x);
  top: var(--terminal-y);
  width: 13px;
  height: 13px;
  padding: 0;
  transform: translate(-50%, -50%);
  border: 2px solid var(--surface-2);
  border-radius: 50%;
  background: var(--ink-faint);
  cursor: pointer;
  box-shadow: 0 0 0 1px var(--line);
  transition: transform 120ms ease, background 120ms ease, box-shadow 120ms ease;
}
.terminal-anchor:hover { transform: translate(-50%, -50%) scale(1.22); background: var(--ink); }
.terminal-anchor.selected {
  transform: translate(-50%, -50%) scale(1.18);
  background: var(--ink);
  border-color: var(--ink);
  box-shadow: 0 0 0 2px var(--primary);
}

.terminal-selection {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 10.5px;
  text-align: center;
}
.terminal-selection strong { color: var(--ink); font-weight: 600; }

.terminal-marker {
  position: absolute;
  left: var(--terminal-x);
  top: var(--terminal-y);
  z-index: 2;
  min-width: 22px;
  height: 17px;
  padding: 1px 4px;
  transform: translate(-50%, -50%);
  border: 2px solid var(--ink);
  border-radius: 5px;
  color: var(--primary-ink);
  font: 750 9px var(--mono);
  text-align: center;
  line-height: 11px;
  pointer-events: none;
  box-shadow: 0 2px 7px rgba(0, 0, 0, 0.45);
}
.terminal-marker.minus { background: var(--bminus); }
.terminal-marker.plus { background: var(--bplus); }
.terminal-marker.bottom { border-style: dashed; }
.terminal-marker.active { box-shadow: 0 0 0 2px var(--accent), 0 2px 8px rgba(0, 0, 0, 0.55); }
.terminal-marker.coincident.minus { transform: translate(-72%, -72%); }
.terminal-marker.coincident.plus { transform: translate(-28%, -28%); }

.terminal-readouts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 8px;
}
.terminal-readout {
  min-width: 0;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--ink-soft);
  font: 9.5px/1.35 var(--mono);
  text-align: left;
  cursor: pointer;
}
.terminal-readout strong {
  display: block;
  margin-bottom: 2px;
  font-size: 11px;
}
.terminal-readout.terminal-minus strong { color: var(--bminus); }
.terminal-readout.terminal-plus strong { color: var(--bplus); }
.terminal-readout[aria-pressed="true"] { border-color: var(--accent); }

.row-between { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.note-inline {
  margin: 0; font-size: 11px; line-height: 1.5; color: var(--ink-faint);
}

/* ------------------------------------------------------------- cell picker */

#cellSelect { font-family: var(--mono); font-size: 12px; }

/* ------------------------------------------------------- cell spec provenance */

.spec-readout {
  display: grid; grid-template-columns: 1fr auto;
  gap: 5px 12px;
  padding: 11px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg);
  font-size: 12px;
}
.spec-readout dt { color: var(--ink-faint); }
.spec-readout dd {
  margin: 0; text-align: right;
  font-family: var(--mono); font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.spec-readout dd.est::after {
  content: " †";
  color: var(--warn); font-weight: 700;
}
.spec-readout .est-note {
  grid-column: 1 / -1;
  margin: 6px 0 0; padding-top: 8px;
  border-top: 1px solid var(--line-soft);
  font-size: 10.5px; line-height: 1.5; color: var(--ink-faint);
}
.note-inline a { color: var(--primary); }
[data-theme="light"] .note-inline a { color: var(--primary-hi); }

/* --------------------------------------------------------- nested tweak group */

.subgroup {
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: var(--bg);
}
.subgroup > summary {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 11px;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.09em;
  color: var(--ink-soft);
  cursor: pointer;
  list-style: none;
}
.subgroup > summary::-webkit-details-marker { display: none; }
.subgroup > summary:hover { color: var(--ink); }
.subgroup[open] > summary { border-bottom: 1px dashed var(--line); }
.subgroup-body {
  display: flex; flex-direction: column; gap: 10px;
  padding: 11px;
}

/* ----------------------------------------------------------------- toggles */

.toggles { display: flex; flex-direction: column; gap: 7px; }
.switch {
  flex-direction: row; align-items: center; gap: 9px;
  font-size: 12.5px; color: var(--ink-soft);
  text-transform: none; letter-spacing: 0;
  cursor: pointer;
}
.switch input {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
  pointer-events: none;
}
.switch span {
  position: relative;
  padding-left: 36px;
  min-height: 20px;
  display: flex;
  align-items: center;
}
.switch span::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 30px; height: 17px;
  border-radius: 999px;
  background: var(--line);
  transition: background 0.15s;
}
.switch span::after {
  content: "";
  position: absolute;
  left: 2px; top: 50%;
  transform: translateY(-50%);
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--ink-soft);
  transition: transform 0.15s, background 0.15s;
}
.switch input:checked + span::before { background: color-mix(in srgb, var(--primary) 55%, var(--line)); }
.switch input:checked + span::after {
  transform: translate(13px, -50%);
  background: var(--primary);
}
.switch input:focus-visible + span::before {
  box-shadow: 0 0 0 2px var(--focus-ring);
}
.switch:hover { color: var(--ink); }

/* ----------------------------------------------------------------- buttons */

.btn-primary, .btn-solid {
  width: 100%; padding: 11px;
  border: none; border-radius: 8px;
  font-size: 13px; font-weight: 650;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, opacity 0.15s;
}

.btn-primary {
  background: transparent; color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-primary:hover:not(:disabled) { background: var(--primary); color: var(--primary-ink); }

.panel-action {
  position: sticky; top: 0; z-index: 4;
  margin: -16px -18px 10px;
  padding: 16px 18px;
  background: var(--surface);
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.2s, border-color 0.2s;
}
[data-sidebar="compact"] .panel-action {
  margin: -14px -14px 10px;
  padding: 14px;
}
.panel-action .btn-solid { margin: 0; }
.rebuild-status {
  margin: 7px 1px 0;
  color: var(--ink-faint);
  font-size: 11px;
  line-height: 1.35;
  transition: color 0.2s;
}
.panel-action.is-dirty {
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  border-bottom-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}
.panel-action.is-dirty .btn-solid {
  background: var(--accent);
  color: var(--primary-ink);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 55%, transparent),
    0 8px 22px color-mix(in srgb, var(--accent) 24%, transparent);
  animation: rebuild-attention 1.8s ease-in-out infinite;
}
.panel-action.is-dirty .rebuild-status { color: var(--warn); }
.panel-action.is-building .btn-solid .icon { animation: rebuild-spin 0.9s linear infinite; }
.panel-action.is-building .rebuild-status { color: var(--ink-soft); }

@keyframes rebuild-attention {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 22%, transparent); }
  50% { box-shadow: 0 0 0 5px transparent, 0 8px 22px color-mix(in srgb, var(--accent) 22%, transparent); }
}
@keyframes rebuild-spin { to { transform: rotate(360deg); } }

.btn-solid {
  background: var(--primary); color: var(--primary-ink);
  border: 1px solid transparent;
}
.btn-solid:hover:not(:disabled) { background: var(--primary-hi); }

.btn-row { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.btn-ghost {
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--ink-soft);
  font-size: 12px; font-weight: 550;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, opacity 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn-ghost:hover:not(:disabled) { color: var(--ink); border-color: var(--ink-faint); }

.link-btn {
  background: none; border: none; padding: 0;
  color: var(--primary);
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.07em;
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.link-btn:hover:not(:disabled) { color: var(--primary-hi); }

.pack-layout-panel {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.55rem;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 92%, var(--bg));
}

.pack-layout-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.pack-layout-toolbar .polarity-toggle,
.pack-layout-toolbar .face-toggle {
  display: inline-flex;
  gap: 0.2rem;
}

.layout-need {
  margin-left: 0.35rem;
  font-size: 10px;
  color: var(--ink-faint);
  font-weight: 500;
}

.layout-slot.is-readonly {
  cursor: default;
  pointer-events: none;
}

.layout-terminal-anchor {
  position: absolute;
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--ink-faint) 50%, transparent);
  background: var(--surface);
  padding: 0;
  cursor: pointer;
  opacity: 0.55;
  z-index: 2;
}

.layout-terminal-anchor.selected {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 35%, var(--surface));
  opacity: 1;
  transform: scale(1.2);
}

.layout-terminal-marker {
  position: absolute;
  transform: translate(-50%, -50%);
  font-size: 9px;
  font-weight: 700;
  padding: 0.1rem 0.28rem;
  border-radius: 4px;
  z-index: 3;
  pointer-events: none;
  white-space: nowrap;
}

.layout-terminal-marker.minus {
  color: #fff;
  background: #a64b3a;
}

.layout-terminal-marker.plus {
  color: #fff;
  background: #2f6f52;
}

.layout-terminal-marker.bottom {
  opacity: 0.75;
  outline: 1px dashed color-mix(in srgb, var(--ink-faint) 45%, transparent);
}

.layout-editor-intro {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.layout-start-btn {
  width: 100%;
  justify-content: center;
}

.layout-editor-panel {
  margin-top: 0.65rem;
  padding: 0.75rem;
  border: 1px solid color-mix(in srgb, var(--primary) 35%, var(--line-soft));
  border-radius: 10px;
  background: color-mix(in srgb, var(--primary) 6%, var(--surface-2));
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.layout-editor-panel[hidden] {
  display: none !important;
}

.layout-editor-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.layout-mode-badge {
  font-size: 10px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.45rem;
  border-radius: 999px;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 28%, transparent);
}

.layout-editor-steps {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 11.5px;
  line-height: 1.45;
  color: var(--ink-muted);
}

.layout-editor-steps li {
  margin-bottom: 0.2rem;
}

.layout-progress {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line-soft);
}

.layout-progress[data-state="ok"] {
  color: var(--ok);
  border-color: color-mix(in srgb, var(--ok) 35%, transparent);
}

.layout-progress[data-state="warn"] {
  color: var(--warn);
  border-color: color-mix(in srgb, var(--warn) 35%, transparent);
}

.layout-expand-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.layout-expand-label {
  font-size: 10.5px;
  color: var(--ink-faint);
  margin-right: 0.15rem;
}

.btn-xs {
  padding: 0.2rem 0.45rem;
  font-size: 10.5px;
  min-height: 0;
}

.layout-lattice-wrap {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg);
  padding: 0.5rem;
  overflow: auto;
  max-height: 220px;
}

.layout-lattice-caption {
  margin: 0 0 0.4rem;
  font-size: 10px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.layout-lattice.rect,
.layout-lattice.honeycomb {
  position: relative;
  min-height: 80px;
  margin: 0 auto;
}

.layout-lattice .layout-slot {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px dashed color-mix(in srgb, var(--ink-faint) 55%, transparent);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: background 0.12s, border-color 0.12s, transform 0.1s;
}

.layout-lattice.honeycomb .layout-slot {
  width: 24px;
  height: 24px;
}

.layout-slot.is-active {
  border-style: solid;
  border-color: color-mix(in srgb, var(--primary) 70%, var(--line));
  background: color-mix(in srgb, var(--primary) 55%, var(--surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, #fff 20%, transparent);
}

.layout-slot.is-empty {
  opacity: 0.55;
}

.layout-slot.is-selected {
  border-color: var(--warn);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--warn) 35%, transparent);
  transform: scale(1.1);
}

.layout-slot.is-addable {
  border: 2px dashed color-mix(in srgb, var(--primary) 65%, var(--line));
  background: color-mix(in srgb, var(--primary) 10%, var(--surface));
  color: var(--primary);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  opacity: 1;
}

.layout-expand-btn {
  min-width: 3.2rem;
  padding: 0.28rem 0.5rem !important;
}

.layout-slot:hover {
  transform: scale(1.08);
  border-color: var(--primary);
}

.layout-slot.is-addable:hover {
  background: color-mix(in srgb, var(--primary) 22%, var(--surface));
}

.layout-slot:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.layout-editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.layout-editor-actions .btn-solid {
  flex: 1 1 auto;
  min-width: 8rem;
}

.layout-editor-hint {
  margin: 0;
}

.layout-editor-idle-hint {
  margin-top: 0.35rem;
}

.canvas-host.layout-editing {
  outline: 2px solid color-mix(in srgb, var(--primary) 45%, transparent);
  outline-offset: -2px;
}

.layout-canvas-tip {
  position: absolute;
  left: 50%;
  bottom: 12px;
  transform: translateX(-50%);
  z-index: 4;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  border: 1px solid var(--line-soft);
  pointer-events: none;
  white-space: nowrap;
}

button:disabled,
.btn-primary:disabled,
.btn-solid:disabled,
.btn-ghost:disabled,
.link-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* -------------------------------------------------------- status utilities */

.ok { color: var(--ok); }
.warn { color: var(--warn); }
.bad { color: var(--bad); }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: none;
}
.status-badge.ok {
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 12%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--ok) 30%, transparent);
}
.status-badge.warn {
  color: var(--warn);
  background: color-mix(in srgb, var(--warn) 12%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
}
.status-badge.bad {
  color: var(--bad);
  background: color-mix(in srgb, var(--bad) 12%, var(--surface-2));
  border: 1px solid color-mix(in srgb, var(--bad) 30%, transparent);
}

/* ---------------------------------------------------- layout suggestions */

.layout-suggestions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}
.layout-suggestions .layout-opt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  text-align: left;
  text-transform: none;
  letter-spacing: 0;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.layout-suggestions .layout-opt:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--surface-2);
}
.layout-suggestions .layout-opt.disabled,
.layout-suggestions .layout-opt:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}
.layout-suggestions .layout-opt .layout-dims {
  font-weight: 650;
  color: var(--ink);
}
.layout-suggestions .layout-opt .layout-meta {
  font-size: 10px;
  color: var(--ink-faint);
}

.cc-candidates {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}
.cc-candidates .cc-candidate-opt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.cc-candidates .cc-candidate-opt:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--surface-2);
}
.cc-candidates .cc-candidate-opt.selected {
  border-color: var(--primary);
  background: var(--surface-2);
}
.cc-candidates .cc-candidate-opt:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.cc-candidates .cc-candidate-opt .cc-meta {
  font-size: 10px;
  color: var(--ink-faint);
}

/* ---------------------------------------------------------------- readouts */

.tab-readout {
  padding: 11px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg);
  font-size: 12px;
}
.tab-readout dl {
  display: grid; grid-template-columns: 1fr auto;
  gap: 6px 12px; margin: 0;
}
.tab-readout dt { color: var(--ink-faint); }
.tab-readout dd {
  margin: 0; text-align: right;
  font-family: var(--mono); font-weight: 600; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.tab-readout .note {
  margin: 10px 0 0; padding-top: 9px;
  border-top: 1px solid var(--line-soft);
  font-size: 10.5px; line-height: 1.5; color: var(--ink-faint);
}
.tab-readout dd.pass { color: var(--ok); }
.tab-readout dd.fail { color: var(--bad); }

.hint {
  margin: 0; font-size: 11px; color: var(--ink-faint);
  font-family: var(--mono);
}
.hint.error { color: var(--bad); }

/* ---------------------------------------------------------------- viewport */

.viewport {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-left: 1px solid var(--line);
}

.view-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px;
  padding: 9px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.legend { display: flex; gap: 16px; font-size: 11.5px; color: var(--ink-soft); flex-wrap: wrap; }
.legend .item { display: flex; align-items: center; gap: 6px; }
.legend .dot { width: 9px; height: 9px; border-radius: 2px; flex: none; }

.viewer-hint {
  display: flex; gap: 14px; flex: none;
  font-size: 10.5px; color: var(--ink-faint);
  text-transform: uppercase; letter-spacing: 0.07em;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.viewer-hint kbd {
  font-family: var(--mono); font-size: 10px;
  padding: 1px 5px; margin-left: 3px;
  border: 1px solid var(--line); border-radius: 4px;
  background: var(--surface-2); color: var(--ink-soft);
  text-transform: none; letter-spacing: 0;
}
.viewer-hint .touch-hint { display: none; }

#canvasHost {
  flex: 1;
  position: relative;
  min-height: 0;
  touch-action: none;
}
#canvasHost canvas {
  display: block;
  touch-action: none;
  cursor: grab;
}
#canvasHost canvas:active { cursor: grabbing; }

.build-loader {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 9px;
  padding: 24px;
  text-align: center;
  background: color-mix(in srgb, var(--viewport-bg) 72%, transparent);
  backdrop-filter: blur(7px) saturate(0.85);
  animation: loader-reveal 0.22s ease-out;
}
.build-loader[hidden] { display: none; }
.build-loader strong { font-size: 14px; letter-spacing: 0.01em; }
.build-loader small { color: var(--ink-soft); font-size: 11px; }
.build-loader-mark {
  position: relative;
  width: 58px;
  height: 58px;
  margin-bottom: 3px;
}
.build-loader-mark span {
  position: absolute;
  inset: 7px;
  border: 2px solid transparent;
  border-top-color: var(--primary);
  border-radius: 16px;
  animation: forge-orbit 1.15s cubic-bezier(0.55, 0.12, 0.45, 0.88) infinite;
}
.build-loader-mark span:nth-child(2) {
  inset: 14px;
  border-top-color: var(--accent);
  border-radius: 10px;
  animation-direction: reverse;
  animation-duration: 0.85s;
}
.build-loader-mark span:nth-child(3) {
  inset: 23px;
  border: 0;
  border-radius: 3px;
  background: var(--primary);
  transform: rotate(45deg);
  animation: forge-core 0.9s ease-in-out infinite;
}
.build-loader-track {
  width: min(250px, 48vw);
  height: 3px;
  margin-top: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink-faint) 22%, transparent);
}
.build-loader-track i {
  display: block;
  width: 45%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  animation: forge-progress 1.25s ease-in-out infinite;
}

/* Onboarding stand-in for an empty viewport. Same overlay mechanics as the
   build loader, but it invites the first build instead of reporting one. */
.onboarding {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: grid;
  place-content: center;
  justify-items: start;
  gap: 13px;
  padding: 32px;
  overflow: auto;
  background: color-mix(in srgb, var(--viewport-bg) 84%, transparent);
  /* No reveal animation: this is the page's initial state, not a transition
     into it, and fading in leaves the viewport looking empty on arrival. */
}
.onboarding[hidden] { display: none; }
.ob-eyebrow {
  margin: 0;
  font-family: var(--mono); font-size: 10.5px;
  text-transform: uppercase; letter-spacing: 0.13em;
  color: var(--primary);
}
.onboarding h2 {
  margin: 0;
  font-size: 21px; font-weight: 640; letter-spacing: -0.01em;
}
.ob-lede {
  margin: 0; max-width: 46ch;
  font-size: 12.5px; line-height: 1.6; color: var(--ink-soft);
}
.ob-steps {
  display: grid; gap: 12px;
  margin: 4px 0 2px; padding: 0;
  list-style: none;
}
.ob-steps li { display: flex; align-items: flex-start; gap: 12px; }
.ob-num {
  flex: none; padding-top: 2px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em;
  color: var(--ink-faint);
}
.ob-steps strong { display: block; font-size: 13px; font-weight: 620; }
.ob-steps p {
  margin: 2px 0 0; max-width: 44ch;
  font-size: 12px; line-height: 1.5; color: var(--ink-soft);
}
.onboarding .btn-solid { width: auto; margin-top: 2px; }
.ob-foot { margin: 0; font-size: 11px; color: var(--ink-faint); }

@keyframes loader-reveal {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes forge-orbit { to { transform: rotate(360deg); } }
@keyframes forge-core {
  0%, 100% { transform: rotate(45deg) scale(0.72); opacity: 0.65; }
  50% { transform: rotate(135deg) scale(1); opacity: 1; }
}
@keyframes forge-progress {
  0% { transform: translateX(-110%); }
  55% { transform: translateX(120%); }
  100% { transform: translateX(245%); }
}

#viewcube {
  position: absolute; top: 14px; right: 14px;
  width: 110px; height: 110px; z-index: 5; cursor: pointer;
  border-radius: 10px;
  background: color-mix(in srgb, var(--surface) 75%, transparent);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
#viewcube canvas { display: block; border-radius: 10px; }

.fit-btn {
  position: absolute; bottom: 16px; right: 16px; z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  color: var(--ink-soft);
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  transition: color 0.15s, border-color 0.15s;
}
.fit-btn:hover { color: var(--ink); border-color: var(--ink-faint); }

/* ------------------------------------------------------------------ labels */

.cell-label {
  padding: 2px 7px; border-radius: 4px;
  font-family: var(--mono); font-size: 10px; font-weight: 600;
  color: var(--ink);
  background: color-mix(in srgb, var(--viewport-bg) 82%, transparent);
  border: 1px solid var(--line);
  white-space: nowrap; pointer-events: none;
}
.cell-label.bplus { border-color: var(--bplus); color: var(--bplus); }
.cell-label.bminus { border-color: var(--bminus); color: var(--bminus); }
.cell-label.under { border-style: dashed; }
.cell-label.bplus, .cell-label.bminus { font-size: 11px; padding: 3px 9px; }

/* ------------------------------------------------------------------ banner */

.banner {
  position: absolute; left: 50%; bottom: 22px;
  transform: translateX(-50%);
  display: flex; align-items: flex-start; gap: 10px;
  max-width: min(680px, 84%);
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink-faint);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface-2) 92%, transparent);
  color: var(--ink);
  font-size: 12.5px; line-height: 1.5;
  box-shadow: var(--shadow);
  white-space: pre-line;
  backdrop-filter: blur(8px);
}
.banner[hidden] { display: none; }
.banner::before {
  flex: none;
  font-family: var(--mono); font-weight: 700;
  color: var(--ink-faint);
  content: "i";
}
.banner.error { border-left-color: var(--bad); }
.banner.error::before { content: "✗"; color: var(--bad); }
.banner.ok { border-left-color: var(--ok); }
.banner.ok::before { content: "✓"; color: var(--ok); }
.banner.busy { border-left-color: var(--accent); }
.banner.busy::before { content: "…"; color: var(--accent); }
.banner.info { border-left-color: var(--primary); }
.banner.info::before { content: "i"; color: var(--primary); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .panel.controls { border-right: none; border-bottom: 1px solid var(--line); padding: 14px; }
  .viewport { height: 70vh; }
  .pack-summary { display: none; }
  .sidebar-edge-toggle { display: none; }
  .pack-layout-toolbar { display: flex; flex-wrap: wrap; }
  .terminal-toolbar { grid-template-columns: 1fr; }
  .viewer-hint .mouse-hint { display: none; }
  .viewer-hint .touch-hint { display: inline; }
}

@media (max-width: 900px) and (pointer: fine) {
  .viewer-hint .mouse-hint { display: inline; }
  .viewer-hint .touch-hint { display: none; }
}

/* Profile controls must stay hidden even when a grid/label has a display rule. */
#tweaks [hidden] { display: none !important; }

#individualParts { display: grid; gap: 8px; margin: 12px 0; }
#individualParts details { border: 1px solid var(--border, #5555); border-radius: 8px; padding: 8px; }
#individualParts summary { cursor: pointer; padding: 4px; }
#individualParts label { display: flex; padding: 5px 4px; }