/*
 * Slatoland — "drafting table" theme.
 * Warm paper, ink lines, and one colour per slat axis (x teal, y violet,
 * z vermilion) used the same way in the 3D view and in the interface.
 *

 */

:root {
  --paper: #f4f1e8;
  --vellum: #fbfaf5;
  --ink: #1f2a37;
  --ink-2: #4a5563;
  --pencil: #7a8494;
  --rule: #cfc8b4;
  --rule-soft: #e3ddcc;
  --grid: rgba(31, 42, 55, 0.045);
  --grid-major: rgba(31, 42, 55, 0.08);
  --x: #0f8b8d;
  --y: #6c4ab6;
  --z: #d9480f;
  --ochre: #c98a00;
  --ok: #2e7d4f;
  --warn: #9a6a00;
  --bad: #b3261e;
  --sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "IBM Plex Serif", Georgia, serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  font: 14px/1.5 var(--sans);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
}
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.25; }
h1 { font-size: 22px; }
h2 { font-size: 17px; }
h3 { font-size: 13px; font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); margin: 0 0 8px; }
h4 { font-size: 13px; margin: 10px 0 4px; font-family: var(--mono); }
p { margin: 0 0 10px; }
a { color: var(--ink); text-underline-offset: 3px; }
a:hover { color: var(--z); }
[hidden] { display: none !important; }
.mono, .num { font-family: var(--mono); }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.note { color: var(--ink-2); font-size: 12.5px; margin: 6px 0 0; }
.good { color: var(--ok); }
.bad { color: var(--bad); }
.plain { list-style: none; margin: 0; padding: 0; }
.plain li { padding: 3px 0; }

/* ── Layout ─────────────────────────────────────────────────────────── */
.app { display: grid; grid-template-columns: 292px minmax(0, 1fr); height: 100vh; }
.app--code { grid-template-columns: 292px minmax(0, 1fr) auto; }
.sidebar {
  background: var(--vellum);
  border-right: 1px solid var(--ink);
  box-shadow: 4px 0 0 -3px var(--ink);
  padding: 14px;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 14px;
}
.sheet { display: flex; flex-direction: column; min-width: 0; height: 100vh; }
.page { padding: 28px 32px 48px; overflow-y: auto; height: 100vh; }
.page__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--ink); padding-bottom: 10px; margin-bottom: 20px; }
.page__head p { margin: 0; color: var(--ink-2); }

/* Title block, as in the corner of an engineering drawing */
.titleblock { border: 1.5px solid var(--ink); display: grid; grid-template-columns: 1fr 1fr; font-family: var(--mono); background: var(--vellum); text-decoration: none; }
.titleblock__name { grid-column: 1 / -1; padding: 8px 10px 6px; font-size: 19px; font-weight: 600; letter-spacing: 0.22em; border-bottom: 1px solid var(--ink); display: flex; align-items: center; gap: 10px; }
.titleblock__mark { display: inline-grid; grid-template-columns: repeat(3, 5px); grid-template-rows: repeat(3, 5px); gap: 2px; }
.titleblock__mark i { background: var(--ink); }
.titleblock__mark i:nth-child(5) { background: transparent; }
.titleblock__mark i:nth-child(2), .titleblock__mark i:nth-child(8) { background: var(--x); }
.titleblock__mark i:nth-child(4), .titleblock__mark i:nth-child(6) { background: var(--y); }
.titleblock__mark i:nth-child(1), .titleblock__mark i:nth-child(9) { background: var(--z); }
.titleblock__cell { padding: 4px 10px; font-size: 10.5px; color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.06em; }
.titleblock__cell + .titleblock__cell { border-left: 1px solid var(--ink); }
.titleblock__cell b { display: block; color: var(--ink); font-weight: 500; text-transform: none; letter-spacing: 0; font-size: 12px; }

.group { border-top: 1px solid var(--rule); padding-top: 10px; }
.group > h3 { display: flex; justify-content: space-between; align-items: center; }
.nav { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; }
.nav a, .nav button { display: flex; align-items: center; gap: 8px; width: 100%; padding: 5px 8px; border: 0; background: none; font: inherit; color: var(--ink); text-align: left; text-decoration: none; cursor: pointer; border-left: 2px solid transparent; }
.nav a::before, .nav button::before { content: ""; width: 6px; height: 6px; border: 1px solid var(--ink); flex: none; }
.nav a:hover, .nav button:hover { background: var(--paper); border-left-color: var(--ink); }
.nav .is-active { border-left-color: var(--z); font-weight: 600; }
.nav .is-active::before { background: var(--z); border-color: var(--z); }
.stack { display: grid; gap: 6px; }
.row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.account { margin-top: auto; border-top: 1px solid var(--rule); padding-top: 10px; font-size: 13px; }

/* ── Controls ───────────────────────────────────────────────────────── */
.btn {
  font: 500 13px/1 var(--sans); color: var(--ink); background: var(--vellum);
  border: 1px solid var(--ink); border-radius: 2px; padding: 8px 12px; cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  transition: transform 80ms ease, box-shadow 80ms ease;
}
.btn:hover:not(:disabled) { box-shadow: 2px 2px 0 var(--ink); transform: translate(-1px, -1px); color: var(--ink); }
.btn:active:not(:disabled) { box-shadow: none; transform: none; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn--primary { background: var(--ink); color: var(--vellum); }
.btn--primary:hover:not(:disabled) { color: var(--vellum); box-shadow: 2px 2px 0 var(--z); }
.btn--accent { background: var(--z); border-color: var(--z); color: #fff; }
.btn--accent:hover:not(:disabled) { color: #fff; }
.btn--quiet { border-color: var(--rule); padding: 6px 9px; font-size: 12.5px; }
.btn--danger { color: var(--bad); }
.btn--block { width: 100%; }
.btn[aria-pressed="true"] { background: var(--ink); color: var(--vellum); }
.link { border: 0; background: none; padding: 0; font: inherit; color: var(--ink); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.link:hover { color: var(--z); }
.link:disabled { color: var(--pencil); text-decoration: none; cursor: default; }
.icon { border: 0; background: none; font: 16px/1 var(--mono); color: var(--pencil); cursor: pointer; padding: 2px 5px; }
.icon:hover { color: var(--bad); }

.field { display: grid; gap: 3px; min-width: 0; }
.field > span, .field > label { font: 500 10.5px/1.3 var(--mono); text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-2); }
input[type="text"], input[type="email"], input[type="password"], input[type="number"], input[type="search"], select, textarea {
  font: 13px/1.3 var(--mono); color: var(--ink); background: #fff; border: 1px solid var(--rule); border-radius: 2px; padding: 6px 8px; width: 100%; min-width: 0;
}
input:focus, select:focus, textarea:focus, .btn:focus-visible, .link:focus-visible { outline: 2px solid var(--x); outline-offset: 1px; border-color: var(--x); }
input:disabled, select:disabled { background: var(--paper); color: var(--pencil); }
input[type="range"] { width: 100%; accent-color: var(--ink); }
input[type="checkbox"] { accent-color: var(--ink); }
.check { display: flex; align-items: center; gap: 7px; font-size: 13px; }
.segmented { display: inline-flex; }
.segmented .btn { border-radius: 0; margin-left: -1px; padding: 6px 10px; font-size: 12.5px; }
.form-row .segmented .btn { padding-top: 7px; padding-bottom: 7px; }
.segmented .btn:first-child { margin-left: 0; border-radius: 2px 0 0 2px; }
.segmented .btn:last-child { border-radius: 0 2px 2px 0; }
.segmented .btn:hover:not(:disabled) { transform: none; box-shadow: none; background: var(--paper); }
.segmented .btn[aria-pressed="true"]:hover { background: var(--ink); }

.chip { display: inline-block; font: 500 10.5px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; padding: 3px 6px; border: 1px solid var(--rule); color: var(--ink-2); border-radius: 2px; }
.chip--ok { border-color: var(--ok); color: var(--ok); }
.chip--warn { border-color: var(--warn); color: var(--warn); }
.chips { display: flex; gap: 5px; flex-wrap: wrap; margin: 6px 0; }
.swatch { display: inline-block; width: 10px; height: 10px; vertical-align: -1px; margin-right: 3px; background: var(--pencil); }
.swatch--x { background: var(--x); } .swatch--y { background: var(--y); } .swatch--z { background: var(--z); } .swatch--seed { background: var(--ochre); }

/* ── Designer ───────────────────────────────────────────────────────── */
.strip { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 4px 18px; padding: 10px 18px 0; border-bottom: 1px solid var(--ink); background: var(--vellum); container-type: inline-size; }
.tabs { display: flex; gap: 2px; }
.tab { font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; padding: 9px 14px; border: 1px solid var(--ink); border-bottom: 0; background: var(--paper); color: var(--ink-2); cursor: pointer; border-radius: 2px 2px 0 0; position: relative; top: 1px; }
.tab[aria-selected="true"] { background: var(--vellum); color: var(--ink); border-bottom: 1px solid var(--vellum); box-shadow: inset 0 2px 0 var(--z); }
.strip__name { flex: 1; max-width: 360px; margin-bottom: 7px; }
.strip__stats { margin-left: auto; display: flex; gap: 18px; padding-bottom: 8px; font-family: var(--mono); font-size: 12px; color: var(--ink-2); }
.strip__stats b { color: var(--ink); font-weight: 600; }
.panel { background: var(--vellum); border-bottom: 1px solid var(--rule); padding: 12px 18px; }
.panel--scroll { max-height: 46vh; overflow-y: auto; }
.panel--tall { max-height: 60vh; }
.form-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 10px 12px; align-items: end; }
.form-row + .form-row { margin-top: 10px; }
.span-2 { grid-column: span 2; }

.viewport { flex: 1; min-height: 0; position: relative; margin: 14px 18px 18px; border: 1px solid var(--ink); background: var(--paper); }
.viewport::before, .viewport::after { content: ""; position: absolute; width: 12px; height: 12px; border: 1px solid var(--ink); z-index: 2; pointer-events: none; }
.viewport::before { top: -6px; left: -6px; border-right: 0; border-bottom: 0; }
.viewport::after { bottom: -6px; right: -6px; border-left: 0; border-top: 0; }
.viewport--full { position: fixed; inset: 0; margin: 0; z-index: 50; }
.viewport__canvas { position: absolute; inset: 0; cursor: grab; }
.viewport__canvas:active { cursor: grabbing; }
.overlay { position: absolute; z-index: 3; background: rgba(251, 250, 245, 0.94); border: 1px solid var(--ink); padding: 8px 10px; font-size: 12.5px; }
.overlay--legend { top: 10px; left: 10px; display: grid; gap: 6px; }
.overlay--tools { top: 10px; right: 10px; display: flex; gap: 6px; padding: 6px; }
.overlay--growth { bottom: 10px; left: 10px; width: 280px; }
.overlay--growth .row { justify-content: space-between; font-family: var(--mono); font-size: 11.5px; }
.overlay--overlap { bottom: 10px; right: 10px; width: 268px; max-height: 70%; overflow-y: auto; }
.overlay--overlap header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.kv { display: flex; justify-content: space-between; margin: 0; font-family: var(--mono); font-size: 12px; }
.bars { display: grid; gap: 3px; margin-top: 8px; }
.bar { display: grid; grid-template-columns: 14px 1fr 52px; gap: 6px; align-items: center; font: 11px/1 var(--mono); }
.bar__track { height: 8px; background: var(--rule-soft); }
.bar__fill { display: block; height: 100%; }
.bar__fill--h1 { background: #2e7d4f; } .bar__fill--h2 { background: #8aa33a; } .bar__fill--h3 { background: #d9a400; }
.bar__fill--h4 { background: #e07b1a; } .bar__fill--h5 { background: #d9480f; } .bar__fill--h6 { background: #a3122a; }
.bar__n { text-align: right; color: var(--ink-2); }
.tooltip { position: absolute; z-index: 6; pointer-events: none; background: var(--ink); color: var(--vellum); padding: 6px 9px; font: 11.5px/1.45 var(--mono); max-width: 300px; white-space: nowrap; }
.tooltip i { color: #b9c0cb; font-style: normal; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(128px, 1fr)); gap: 8px; margin-bottom: 14px; }
.cards--tight { grid-template-columns: repeat(auto-fit, minmax(112px, 1fr)); }
.card { border: 1px solid var(--rule); background: #fff; padding: 8px 10px; display: grid; gap: 2px; }
.card__label { font: 500 10px/1.2 var(--mono); text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-2); }
.card__value { font: 600 18px/1.2 var(--mono); }
.card__sub { font: 11px/1.2 var(--mono); color: var(--pencil); }
.columns { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.table th, .table td { padding: 5px 6px; border-bottom: 1px solid var(--rule-soft); text-align: left; }
.table th { font: 500 10.5px/1.2 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-2); border-bottom-color: var(--ink); }
.table th.num, .table td.num { text-align: right; }
.defs { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; margin: 0 0 10px; font-size: 13px; }
.defs dt { font: 500 10.5px/1.6 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-2); }
.defs dd { margin: 0; overflow-wrap: anywhere; }
.defs--inline { display: flex; flex-wrap: wrap; gap: 2px 8px; align-items: baseline; }
.defs--inline dd { margin-right: 14px; font-family: var(--mono); }

.saved { list-style: none; margin: 6px 0 0; padding: 0; font-size: 13px; }
.saved li { display: grid; grid-template-columns: 1fr auto; gap: 0 6px; padding: 5px 0; border-bottom: 1px dotted var(--rule); align-items: center; }
.saved li a { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-decoration: none; }
.saved li.is-current a { font-weight: 600; }
.saved .meta { grid-column: 1; font: 10.5px/1.2 var(--mono); color: var(--pencil); }
.saved .icon { grid-row: 1 / span 2; grid-column: 2; }
.saved .empty { display: block; color: var(--pencil); border: 0; }
.pager { display: flex; justify-content: space-between; align-items: center; font: 11px var(--mono); color: var(--ink-2); margin-top: 6px; }

/* ── Plates ─────────────────────────────────────────────────────────── */
.plates { display: grid; grid-template-columns: 220px minmax(0, 1fr) 250px; gap: 18px; }
.plate-list { list-style: none; margin: 0 0 10px; padding: 0; }
.plate-list li { display: grid; grid-template-columns: 1fr auto; padding: 6px 8px; border: 1px solid var(--rule); margin-bottom: 4px; cursor: pointer; background: #fff; }
.plate-list li.is-current { border-color: var(--ink); box-shadow: inset 3px 0 0 var(--z); }
.plate-list .meta { grid-column: 1; font: 10.5px var(--mono); color: var(--pencil); }
.plate-list .icon { grid-row: 1 / span 2; grid-column: 2; }
.plate-list .empty { display: block; cursor: default; color: var(--pencil); border-style: dashed; background: none; }
.wells { display: grid; grid-template-columns: 20px repeat(var(--cols), minmax(0, 1fr)); gap: 2px; max-width: 760px; }
.wells--1536 { gap: 1px; max-width: 900px; }
.well-head { font: 9.5px/1 var(--mono); color: var(--pencil); display: grid; place-items: center; min-height: 12px; }
.well { aspect-ratio: 1; border: 1px solid var(--rule); border-radius: 50%; background: #fff; padding: 0; min-width: 0; }
.wells--1536 .well { border-radius: 1px; }
.well--full { background: var(--c); border-color: var(--ink); cursor: pointer; }
.well--full:hover, .well.is-selected { outline: 2px solid var(--ink); outline-offset: 1px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: end; margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--rule); }
.toolbar .field { min-width: 128px; }

/* ── Dialogs, toasts, flash ─────────────────────────────────────────── */
dialog { border: 1.5px solid var(--ink); background: var(--vellum); color: var(--ink); padding: 0; width: min(760px, 94vw); max-height: 90vh; box-shadow: 6px 6px 0 rgba(31, 42, 55, 0.18); }
dialog::backdrop { background: rgba(244, 241, 232, 0.78); }
dialog.dialog--small { width: min(460px, 94vw); }
.dialog__head { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--ink); }
.dialog__body { padding: 14px 16px; overflow-y: auto; max-height: calc(90vh - 118px); display: grid; gap: 14px; }
.dialog__foot { display: flex; justify-content: flex-end; gap: 8px; padding: 10px 16px; border-top: 1px solid var(--rule); }
fieldset { border: 1px solid var(--rule); padding: 10px 12px 12px; margin: 0; }
legend { font: 500 10.5px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-2); padding: 0 6px; }
.progress { height: 8px; background: var(--rule-soft); border: 1px solid var(--ink); }
.progress > span { display: block; height: 100%; width: 0; background: var(--z); transition: width 150ms linear; }
.toasts { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); z-index: 100; display: grid; gap: 6px; justify-items: center; }
.toast { background: var(--ink); color: var(--vellum); padding: 9px 14px; font-size: 13px; border-left: 4px solid var(--pencil); max-width: 560px; transition: opacity 250ms ease; }
.toast--ok { border-left-color: #5fbf8a; } .toast--warn { border-left-color: var(--ochre); } .toast--error { border-left-color: #ef6b5e; }
.toast--out { opacity: 0; }
.flash { position: fixed; bottom: 68px; left: 50%; transform: translateX(-50%); z-index: 90; background: var(--vellum); border: 1px solid var(--ink); border-left: 4px solid var(--ok); padding: 9px 14px; font-size: 13px; box-shadow: 3px 3px 0 rgba(31, 42, 55, 0.15); }
.flash--alert { border-left-color: var(--ochre); }

/* ── Catalog, synthesis, docs, account ──────────────────────────────── */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.tile { background: var(--vellum); border: 1px solid var(--ink); display: flex; flex-direction: column; }
.tile__preview { display: block; aspect-ratio: 16 / 11; background: var(--paper); border-bottom: 1px solid var(--rule); overflow: hidden; }
.tile__preview img { width: 100%; height: 100%; object-fit: cover; display: block; }
.tile__placeholder { display: grid; place-items: center; height: 100%; color: var(--pencil); font: 12px var(--mono); }
.tile__body { padding: 10px 12px 12px; display: grid; gap: 2px; }
.tile__body h3 { font: 600 15px/1.3 var(--sans); text-transform: none; letter-spacing: 0; color: var(--ink); margin: 0; }
.tile__body h3 a { text-decoration: none; }
.tile__body .meta { margin: 0; font: 11.5px/1.4 var(--mono); color: var(--ink-2); }
.tile__actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }
.offscreen { position: absolute; left: -9999px; top: 0; width: 520px; height: 358px; }

.run { background: var(--vellum); border: 1px solid var(--ink); margin-bottom: 14px; }
.run > summary { padding: 10px 14px; cursor: pointer; display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
.run > summary strong { font-size: 15px; }
.run > summary .meta { font: 11.5px var(--mono); color: var(--ink-2); }
.run__body { border-top: 1px solid var(--rule); padding: 12px 14px; display: grid; gap: 14px; }
.plate-map { max-width: 720px; }

.prose { max-width: 820px; }
.prose h2 { margin: 30px 0 8px; padding-top: 14px; border-top: 1px solid var(--ink); font-family: var(--mono); letter-spacing: 0.02em; }
.prose h3 { margin: 18px 0 6px; }
.prose p, .prose li { font-size: 14.5px; line-height: 1.62; }
.prose code { font-family: var(--mono); font-size: 12.5px; background: #fff; border: 1px solid var(--rule-soft); padding: 0 4px; }
.prose pre { background: #fff; border: 1px solid var(--rule); padding: 10px 12px; overflow-x: auto; font: 12.5px/1.5 var(--mono); }
.prose .table { margin: 8px 0 14px; background: #fff; border: 1px solid var(--rule); }
.toc { columns: 2; list-style: none; padding: 10px 14px; margin: 0 0 6px; border: 1px solid var(--rule); background: var(--vellum); font-family: var(--mono); font-size: 12.5px; }

.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.auth__card { width: min(420px, 100%); background: var(--vellum); border: 1.5px solid var(--ink); padding: 22px; display: grid; gap: 14px; box-shadow: 6px 6px 0 rgba(31, 42, 55, 0.14); }
.auth__card form { display: grid; gap: 12px; }
.errors { border: 1px solid var(--bad); color: var(--bad); padding: 8px 12px; font-size: 13px; background: #fff; }
.errors ul { margin: 4px 0 0; padding-left: 18px; }
.code { font: 600 22px/1 var(--mono); letter-spacing: 0.2em; padding: 10px 12px; border: 1px dashed var(--ink); background: #fff; display: inline-block; }
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.box { background: var(--vellum); border: 1px solid var(--ink); padding: 16px; display: grid; gap: 12px; align-content: start; }
.box form { display: grid; gap: 12px; }

/* When the strip is narrow (a small window, or the code panel open) the
   readouts take their own line, so the name field keeps its room. */
@container (max-width: 1000px) {
  .strip__stats { order: -1; width: 100%; margin-left: 0; padding-bottom: 0; flex-wrap: wrap; gap: 4px 18px; }
}

/* Assembly code: a panel on the right that folds away to a tab. The tab is
   dark so that it is found; on a wide window the open panel sits beside the
   3D view, on a narrower one it slides over it. */
.codepanel { display: flex; height: 100vh; min-width: 0; border-left: 1.5px solid var(--ink); background: var(--vellum); }
.codepanel__tab {
  flex: none; width: 34px; border: 0; background: var(--ink); color: var(--vellum); cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 16px 0;
}
.codepanel__tab:hover { background: #2c3a4b; }
.codepanel__tab:focus-visible { outline: 2px solid var(--z); outline-offset: -3px; }
.codepanel__chevron { width: 8px; height: 8px; border-left: 2px solid var(--vellum); border-bottom: 2px solid var(--vellum); transform: rotate(45deg); margin-left: 4px; }
.codepanel--open .codepanel__chevron { transform: rotate(-135deg); margin-left: -4px; }
.codepanel__tablabel { writing-mode: vertical-rl; font: 600 11.5px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.16em; }
.codepanel__body { width: clamp(340px, 30vw, 540px); display: flex; flex-direction: column; gap: 10px; padding: 14px 16px 16px; min-height: 0; }
.codepanel__body[hidden] { display: none; }
.codepanel__head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.codepanel__head h2 { margin: 0; font-size: 16px; }
.codepanel__body .note { margin: 0; }
.codepanel__body code { font: 12px/1 var(--mono); background: var(--paper); padding: 1px 4px; border: 1px solid var(--rule-soft); }
.codepanel__examples { width: auto; flex: 1; min-width: 120px; padding: 5px 6px; font-size: 12.5px; }
.codepanel__text {
  flex: 1; min-height: 180px; resize: none; white-space: pre-wrap; overflow-wrap: anywhere; overflow-y: auto; tab-size: 2;
  font: 11.5px/1.5 var(--mono); background: #fff; border: 1px solid var(--ink); padding: 10px;
}
.codepanel__status { font-size: 12.5px; line-height: 1.45; color: var(--ink-2); max-height: 30vh; overflow-y: auto; }
.codepanel__status:empty { display: none; }
.codepanel__status--ok { border-left: 3px solid var(--ok); padding-left: 9px; }
.codepanel__status--warn { border-left: 3px solid var(--ochre); padding-left: 9px; }
.codepanel__status--bad { border-left: 3px solid var(--bad); padding-left: 9px; color: var(--bad); }
.codepanel__status ul { margin: 4px 0 0; padding-left: 18px; }

/* Not wide enough for three columns: the tab stays pinned to the right edge of
   the window and the open panel lies over the page. */
@media (max-width: 1279px) {
  .app--code { grid-template-columns: 292px minmax(0, 1fr); padding-right: 34px; }
  .codepanel { position: fixed; top: 0; right: 0; z-index: 40; }
  .codepanel--open { box-shadow: -8px 0 0 rgba(31, 42, 55, 0.14); }
  .codepanel__body { width: min(540px, calc(100vw - 34px)); min-width: 0; }
}

@media (max-width: 980px) {
  .app { grid-template-columns: 1fr; height: auto; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--ink); }
  .sheet, .page { height: auto; }
  .viewport { min-height: 60vh; }
  .plates { grid-template-columns: 1fr; }
  .app--code { grid-template-columns: 1fr; }
}