:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --surface: #12161b;
  --surface-2: #1b2128;
  --ink: #f1f4f7;
  --muted: #98a4af;
  --grid: rgba(218, 228, 236, .13);
  --border: #313a44;
  --request: #9aa7b4;
  --execute: #5ad1c9;
  --measure: #ffaf5c;
  --positive: #5ad1c9;
  --negative: #ff7c9d;
  --warning: #ffb45e;
  --safe: #66cf88;
  --bx: #62a5ff;
  --by: #ff8a5b;
  --bz: #55d69b;
  --cycle: #55d69b;
  --cut: #a98af2;
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f2f0ea;
    --surface: #fbfaf6;
    --surface-2: #e8e5dc;
    --ink: #16191c;
    --muted: #667078;
    --grid: rgba(27, 34, 40, .14);
    --border: #c9c6bc;
    --request: #646d78;
    --execute: #006d77;
    --measure: #a14a00;
    --positive: #006d77;
    --negative: #a6405c;
    --warning: #8a4b00;
    --safe: #2b6d41;
    --bx: #1b62b2;
    --by: #bf4d22;
    --bz: #147451;
    --cycle: #147451;
    --cut: #654ca3;
  }
}

* { box-sizing: border-box; }

html { background: var(--bg); color: var(--ink); }

body {
  margin: 0;
  font-family: var(--font-ui);
  background:
    radial-gradient(circle at 82% 0%, color-mix(in srgb, var(--execute) 8%, transparent), transparent 32rem),
    var(--bg);
}

button, select, input { font: inherit; }

button, select {
  min-height: 2.25rem;
  border: 1px solid var(--border);
  border-radius: .35rem;
  background: var(--surface);
  color: var(--ink);
  padding: .42rem .72rem;
}

button { cursor: pointer; }
button:hover { border-color: var(--execute); }
button[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
button.quiet { background: transparent; }
button:focus-visible, select:focus-visible, input:focus-visible { outline: 2px solid var(--execute); outline-offset: 2px; }

.scope-shell { width: min(1480px, 100%); margin: 0 auto; padding: 1rem clamp(.75rem, 2vw, 2rem) 2rem; }

.public-nav { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1rem; padding-bottom: .7rem; border-bottom: 1px solid var(--border); }
.public-nav a { color: var(--ink); text-decoration: none; }
.public-brand { font: 700 1.15rem var(--font-ui); letter-spacing: -.03em; }
.public-brand span { color: var(--execute); font-weight: 500; }
.public-actions { display: flex; align-items: center; gap: .6rem; }
.about-link { padding: .55rem .75rem; color: var(--muted) !important; font: .7rem var(--font-mono); letter-spacing: .06em; text-transform: uppercase; }
.about-link:hover { color: var(--ink) !important; }
.nihongo-button { display: inline-flex; align-items: center; justify-content: center; min-height: 3rem; padding: .65rem 1.15rem; border: 1px solid var(--execute); border-radius: .4rem; background: var(--execute); color: #07110f !important; font-size: 1.05rem; font-weight: 750; box-shadow: 0 0 0 .3rem color-mix(in srgb, var(--execute) 10%, transparent); }
.nihongo-button:hover { filter: brightness(1.08); transform: translateY(-1px); }

.scope-header { display: flex; justify-content: space-between; align-items: end; gap: 1rem; margin-bottom: .8rem; }
.scope-header h1 { margin: 0; font-size: clamp(1.85rem, 4vw, 3.5rem); font-weight: 500; letter-spacing: -.045em; }
.scope-thesis { max-width: 66rem; margin: .35rem 0 0; color: var(--muted); line-height: 1.45; font-size: .9rem; }
.eyebrow, .strip-label { margin: 0 0 .22rem; color: var(--muted); font-family: var(--font-mono); font-size: .68rem; letter-spacing: .13em; }
.connection { display: flex; gap: .5rem; align-items: center; text-transform: uppercase; font-family: var(--font-mono); font-size: .78rem; }
.state-dot { width: .62rem; height: .62rem; border-radius: 50%; background: var(--muted); }
.state-dot.running { background: var(--execute); box-shadow: 0 0 0 .28rem color-mix(in srgb, var(--execute) 18%, transparent); }
.state-dot.safe { background: var(--safe); }
.state-dot.error { background: var(--negative); }

.session-strip {
  display: grid;
  grid-template-columns: minmax(10rem, 1.05fr) minmax(14rem, 1.5fr) minmax(12rem, 1.15fr) minmax(12rem, 1fr);
  gap: 1px;
  border: 1px solid var(--border);
  background: var(--border);
}
.session-strip > div { min-width: 0; background: var(--surface); padding: .7rem .8rem; }
.session-strip strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .85rem; font-weight: 500; }
.truth-warning strong { color: var(--warning); }

.model-boundary {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1.2rem;
  margin: .8rem 0;
  padding: .65rem .8rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--warning);
  background: var(--surface);
  color: var(--muted);
  font-size: .75rem;
  line-height: 1.45;
}
.model-boundary strong, .model-boundary b { color: var(--ink); }

.behavior-panel { border: 1px solid var(--border); background: var(--surface); margin-top: .85rem; }
.behavior-heading { padding: .8rem; border-bottom: 1px solid var(--border); }
.behavior-heading h2 { font-size: 1.05rem; }
.behavior-controls { display: flex; gap: .5rem; min-width: min(26rem, 100%); }
.behavior-controls select { min-width: 0; flex: 1; }
.behavior-grid { display: grid; grid-template-columns: minmax(22rem, .82fr) minmax(34rem, 1.4fr); }
.behavior-score, .spatial-stack { min-width: 0; padding: .75rem; }
.behavior-score { border-right: 1px solid var(--border); }
#behavior-wave-canvas { display: block; width: 100%; height: 305px; }
.corner-objective-sockets { display: grid; grid-template-columns: repeat(4, auto) minmax(8rem, 1fr); gap: .35rem; align-items: center; margin: .3rem 0 .55rem; color: var(--muted); font: .62rem var(--font-mono); }
.corner-objective-sockets span { padding: .25rem .35rem; border: 1px dashed var(--border); text-align: center; }
.corner-objective-sockets strong { font-family: var(--font-ui); font-weight: 400; line-height: 1.3; }
.behavior-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-top: .7rem; background: var(--border); border: 1px solid var(--border); }
.behavior-summary > div { min-width: 0; padding: .55rem .65rem; background: var(--surface-2); }
.behavior-summary strong { display: block; font-size: .76rem; line-height: 1.35; }
.behavior-meaning { margin: .65rem 0 0; color: var(--muted); font-size: .75rem; line-height: 1.45; }
.spatial-head, .spatial-legend { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .35rem 1rem; color: var(--muted); font-size: .72rem; }
.spatial-source-control { display: flex; align-items: center; flex-wrap: wrap; gap: .4rem .65rem; }
.spatial-source-control select { min-width: 12.5rem; }
.spatial-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; margin: .5rem 0; }
.slice-card { position: relative; min-width: 0; margin: 0; border: 1px solid var(--border); background: #090c10; }
.slice-card canvas { display: block; width: 100%; height: 220px; }
.slice-card figcaption { position: absolute; left: .4rem; bottom: .35rem; padding: .12rem .3rem; color: #d9e3e9; background: rgba(4,7,10,.76); font: .66rem var(--font-mono); }

.section-divider { display: flex; align-items: center; gap: .7rem; margin: 1.35rem 0 .65rem; color: var(--muted); font: .68rem var(--font-mono); letter-spacing: .12em; }
.section-divider::before, .section-divider::after { content: ""; height: 1px; background: var(--border); flex: 1; }

.toolbar { display: flex; align-items: end; flex-wrap: wrap; gap: .55rem; margin: .85rem 0 .55rem; }
.toolbar label { display: grid; gap: .2rem; flex: 1 1 18rem; min-width: 0; max-width: 34rem; color: var(--muted); font-size: .72rem; }
.toolbar select { width: 100%; min-width: 0; }
body.static-mode .toolbar { display: none; }

.legend-row { display: flex; flex-wrap: wrap; gap: .65rem 1rem; align-items: center; color: var(--muted); font-size: .75rem; margin: .5rem 0 .8rem; }
.legend-row span { display: inline-flex; align-items: center; gap: .4rem; }
.legend-line { display: inline-block; width: 1.45rem; height: .55rem; position: relative; }
.legend-line::after { content: ""; position: absolute; inset: 50% 0 auto; border-top: 2px solid; }
.legend-line.requested::after { border-color: var(--request); border-top-style: dashed; }
.legend-line.executed::after { border-color: var(--execute); }
.legend-line.measured::after { border-color: var(--measure); border-top-style: dotted; }
.sign-note { margin-left: auto; }

.main-grid { display: grid; grid-template-columns: minmax(0, 2.15fr) minmax(18rem, 1fr); gap: .85rem; align-items: stretch; }
.wave-panel, .geometry-panel, .instant-panel { background: var(--surface); border: 1px solid var(--border); }
.wave-panel, .geometry-panel { padding: .75rem; }
.panel-heading { min-height: 2rem; display: flex; justify-content: space-between; align-items: center; gap: .75rem; }
.panel-heading h2 { margin: 0; font-size: .88rem; font-weight: 500; letter-spacing: .01em; }
.panel-heading > span, .panel-heading > output { color: var(--muted); font-size: .74rem; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

#wave-canvas { display: block; width: 100%; height: 560px; background: var(--surface); }
#tetra-canvas { display: block; width: 100%; height: 510px; background: var(--surface); }
.cursor-control { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: .65rem; color: var(--muted); font-size: .73rem; }
.cursor-control input { width: 100%; }
.geometry-key { margin: .35rem 0 0; color: var(--muted); font-size: .72rem; line-height: 1.35; }

.instant-panel { margin-top: .85rem; padding: .75rem; }
.value-grid { display: grid; grid-template-columns: repeat(10, minmax(5.2rem, 1fr)); margin-top: .55rem; border-top: 1px solid var(--border); border-left: 1px solid var(--border); overflow-x: auto; }
.value-cell { min-width: 5.2rem; padding: .55rem .5rem; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.value-cell.disabled { color: var(--muted); background: var(--surface-2); }
.value-name { display: flex; justify-content: space-between; align-items: baseline; gap: .3rem; font-family: var(--font-mono); font-size: .73rem; }
.value-family { color: var(--muted); font-family: var(--font-ui); font-size: .62rem; }
.value-number { margin-top: .25rem; font-family: var(--font-mono); font-size: 1.03rem; font-variant-numeric: tabular-nums; }
.value-number.positive { color: var(--positive); }
.value-number.negative { color: var(--negative); }
.value-sub { margin-top: .13rem; color: var(--muted); font-size: .63rem; white-space: nowrap; }
.notice { padding: .7rem; border-left: 3px solid var(--negative); background: var(--surface); }

.relations-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; margin-top: .85rem; }
.relation-panel, .departure-panel { min-width: 0; padding: .75rem; border: 1px solid var(--border); background: var(--surface); }
#response-canvas { display: block; width: 100%; height: 190px; }
#reach-canvas { display: block; width: 100%; height: 190px; background: var(--surface-2); }
.observer-readout { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); }
.observer-readout > div { padding: .45rem .55rem; background: var(--surface-2); }
.observer-readout span, .vertex-additions span { display: block; color: var(--muted); font: .63rem var(--font-mono); }
.observer-readout strong, .vertex-additions strong { font: .9rem var(--font-mono); }
.relation-note { margin: .6rem 0 0; color: var(--muted); font-size: .72rem; line-height: 1.45; }
.line-chip { display: inline-block; width: 1.2rem; vertical-align: middle; border-top: 2px solid var(--measure); }
.line-chip.estimate { border-color: var(--request); border-top-style: dashed; }
.splitbar { display: flex; height: 1.65rem; overflow: hidden; margin: .55rem 0 .35rem; border-radius: .2rem; background: var(--surface-2); }
.splitbar div { display: grid; place-items: center; overflow: hidden; color: #07100c; font: .66rem var(--font-mono); transition: width .12s; }
#cycle-fill { width: 50%; background: var(--cycle); }
#cut-fill { width: 50%; background: var(--cut); }
.split-values, .catalog-stats { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .35rem 1rem; color: var(--muted); font: .68rem var(--font-mono); }
.vertex-additions { display: grid; grid-template-columns: repeat(4, 1fr); gap: .4rem; margin-top: .55rem; }
.vertex-additions > div { padding: .5rem; text-align: center; background: var(--surface-2); }
.pair-table { width: 100%; margin-top: .45rem; border-collapse: collapse; font: .72rem var(--font-mono); }
.pair-table th, .pair-table td { padding: .45rem .25rem; border-bottom: 1px solid var(--border); text-align: left; }
.pair-table th:nth-child(n+2), .pair-table td:nth-child(n+2) { text-align: right; }
.pair-table th { color: var(--muted); font-weight: 400; }
.departure-panel { margin-top: .85rem; }
.departure-panel ul { list-style: none; margin: .5rem 0 0; padding: 0; }
.departure-panel li { display: flex; gap: .55rem; padding: .42rem 0; border-top: 1px solid var(--border); color: var(--muted); font-size: .75rem; line-height: 1.4; }
.departure-panel li::before { content: "BOUNDARY"; flex: none; color: var(--warning); font: .58rem var(--font-mono); letter-spacing: .06em; padding-top: .16rem; }
.provenance-footer { margin-top: 1rem; padding: .8rem 0; border-top: 1px solid var(--border); color: var(--muted); font-size: .7rem; line-height: 1.5; }

@media (max-width: 920px) {
  .session-strip { grid-template-columns: 1fr 1fr; }
  .main-grid { grid-template-columns: 1fr; }
  #wave-canvas { height: 520px; }
  #tetra-canvas { height: 390px; }
  .sign-note { margin-left: 0; width: 100%; }
  .behavior-grid { grid-template-columns: 1fr; }
  .behavior-score { border-right: 0; border-bottom: 1px solid var(--border); }
}

@media (max-width: 560px) {
  .scope-shell { padding-inline: .55rem; }
  .scope-header { align-items: center; }
  .session-strip { grid-template-columns: 1fr; }
  .toolbar { align-items: stretch; }
  .toolbar > * { flex: 1 1 100%; max-width: none; }
  #wave-canvas { height: 510px; }
  #tetra-canvas { height: 340px; }
  .value-grid { grid-template-columns: repeat(10, 5.6rem); }
  .behavior-heading { align-items: stretch; flex-direction: column; }
  .behavior-controls { min-width: 0; width: 100%; flex-direction: column; }
  .spatial-grid, .relations-grid { grid-template-columns: 1fr; }
  .slice-card canvas { height: 250px; }
  .behavior-summary { grid-template-columns: 1fr; }
  .corner-objective-sockets { grid-template-columns: repeat(4, 1fr); }
  .corner-objective-sockets strong { grid-column: 1 / -1; }
  .observer-readout { grid-template-columns: repeat(2, 1fr); }
  .public-nav { align-items: stretch; }
  .public-actions { gap: .25rem; }
  .about-link { display: none; }
  .nihongo-button { min-height: 2.65rem; padding-inline: .8rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}