/* SPDX-License-Identifier: MPL-2.0 */
:root {
  color-scheme: dark;
  --background: #080b0b;
  --surface: #0d1111;
  --surface-raised: #121817;
  --surface-soft: #171e1d;
  --ink: #e4e9e6;
  --muted: #929f9b;
  --dim: #5f6c68;
  --line: #2c3734;
  --line-strong: #4a5a56;
  --canvas: #070a0a;
  --grid: #34403e;
  --axis: #82908d;
  --edge: #83918d;
  --fibre-edge: #d7a957;
  --fixed: #e2d6bf;
  --amber: #d7a957;
  --amber-bright: #f0c978;
  --amber-dark: #7d5f2d;
  --mineral: #6faaa2;
  --mineral-dark: #365d59;
  --oxide: #ba7059;
  --oxide-dark: #673c31;
  --danger: #d2705b;
  --success: #8caf92;
  --fibre-0: var(--amber);
  --fibre-1: var(--mineral);
  --fibre-2: var(--oxide);
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-width: 320px;
  background: var(--background);
  color: var(--ink);
  font-family: var(--sans);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at 78% 8%, rgba(111, 170, 162, 0.08), transparent 30rem),
    radial-gradient(circle at 24% 42%, rgba(215, 169, 87, 0.055), transparent 38rem),
    var(--background);
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="file"] {
  border: 1px solid var(--line);
  color: var(--ink);
  background: #0a0e0e;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 2px solid var(--amber-bright);
  outline-offset: 3px;
}

a {
  color: var(--amber-bright);
  text-decoration-color: var(--amber-dark);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--ink);
  text-decoration-color: var(--amber-bright);
}

h1,
h2,
p {
  margin-top: 0;
}

h1,
h2 {
  letter-spacing: -0.035em;
}

h1 {
  margin-bottom: 5px;
  font-size: clamp(24px, 3.2vw, 42px);
  line-height: 0.98;
  font-weight: 760;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(17px, 2vw, 23px);
  font-weight: 690;
}

code,
kbd {
  font-family: var(--mono);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.eyebrow {
  margin-bottom: 7px;
  color: var(--amber);
  font: 700 10px/1 var(--mono);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.muted {
  color: var(--muted);
}

.masthead {
  min-height: 106px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 19px clamp(18px, 3vw, 38px);
  background: rgba(8, 11, 11, 0.94);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
}

.brand-mark {
  width: 74px;
  height: 62px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  box-shadow:
    inset 0 0 0 5px var(--background),
    inset 0 0 0 6px #2c3633;
  color: var(--amber);
  position: relative;
  font: 680 19px/1 var(--mono);
  letter-spacing: -0.08em;
}

.brand-mark b {
  position: absolute;
  right: 8px;
  bottom: 7px;
  color: var(--muted);
  font-size: 8px;
  letter-spacing: 0.02em;
}

.brand-copy {
  min-width: 0;
}

.brand-copy > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.header-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
  font: 600 10px/1 var(--mono);
  letter-spacing: 0.04em;
}

.status-chip {
  padding: 8px 10px;
  border: 1px solid var(--line);
  color: var(--muted);
  text-transform: uppercase;
}

.status-chip i {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 9px rgba(140, 175, 146, 0.6);
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(320px, 370px) minmax(0, 1fr);
  min-height: calc(100vh - 106px);
}

.control-rack {
  min-width: 0;
  padding: 16px;
  background: rgba(10, 13, 13, 0.92);
  border-right: 1px solid var(--line);
}

.rack-section {
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-bottom: 0;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.017), transparent 42%),
    var(--surface);
}

.rack-section:last-child {
  border-bottom: 1px solid var(--line);
}

.section-label {
  margin-bottom: 15px;
  color: var(--muted);
  font: 720 10px/1 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-label span {
  color: var(--amber);
  padding-right: 7px;
}

.control-rack label {
  display: grid;
  gap: 7px;
  color: #b4bfbc;
  font: 650 10px/1.3 var(--mono);
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.control-rack label + label,
.control-rack label + .transport-row,
.control-rack .transport-row + label,
.control-rack .two-controls + label {
  margin-top: 15px;
}

.control-rack output {
  grid-row: 1;
  justify-self: end;
  color: var(--amber-bright);
  font-weight: 500;
}

.control-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

.model-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  padding: 0;
  margin: 0;
  border: 0;
}

.model-switch label {
  cursor: pointer;
}

.model-switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.model-switch span {
  min-height: 70px;
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 11px;
  border: 1px solid var(--line);
  background: var(--background);
  text-transform: none;
  transition: border-color 120ms ease, background 120ms ease;
}

.model-switch b {
  color: var(--ink);
  font-size: 13px;
}

.model-switch small {
  color: var(--muted);
  font: 500 9px/1.35 var(--mono);
}

.model-switch input:checked + span {
  border-color: var(--amber);
  background: rgba(215, 169, 87, 0.08);
  box-shadow: inset 3px 0 0 var(--amber);
}

.model-switch input:focus-visible + span {
  outline: 2px solid var(--amber-bright);
  outline-offset: 2px;
}

button {
  min-height: 38px;
  padding: 9px 11px;
  cursor: pointer;
  font: 720 10px/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: border-color 120ms ease, color 120ms ease, background 120ms ease;
}

button:hover:not(:disabled) {
  color: var(--amber-bright);
  border-color: var(--amber);
}

button:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

button.primary {
  color: #17130d;
  background: var(--amber);
  border-color: var(--amber);
}

button.primary:hover:not(:disabled) {
  color: #0b0d0c;
  background: var(--amber-bright);
}

kbd {
  padding: 3px 5px;
  border: 1px solid rgba(0, 0, 0, 0.35);
  color: inherit;
  font-size: 8px;
}

.transport-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 7px;
}

.transport-row .primary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

select,
input[type="file"] {
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  border-radius: 0;
  font: 520 11px/1.2 var(--mono);
  text-transform: none;
}

select:hover,
input[type="file"]:hover {
  border-color: var(--line-strong);
}

input[type="range"] {
  width: 100%;
  height: 17px;
  margin: 1px 0 0;
  appearance: none;
  background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  background: #394340;
}

input[type="range"]::-webkit-slider-thumb {
  width: 13px;
  height: 17px;
  margin-top: -7px;
  appearance: none;
  border: 2px solid var(--surface);
  background: var(--amber);
}

input[type="range"]::-moz-range-track {
  height: 3px;
  background: #394340;
}

input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 14px;
  border: 2px solid var(--surface);
  border-radius: 0;
  background: var(--amber);
}

.check-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 15px;
}

.check-row {
  grid-template-columns: auto 1fr;
  align-items: center;
  padding: 9px;
  border: 1px solid var(--line);
  background: var(--background);
  cursor: pointer;
}

.check-row input {
  accent-color: var(--amber);
}

.two-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 15px;
}

.file-input input {
  padding: 5px;
}

.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.workspace {
  min-width: 0;
  padding: 22px clamp(16px, 2.5vw, 36px) 46px;
}

.model-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 16px;
}

.model-heading > p {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
  text-align: right;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  background: var(--line);
}

.metric-grid article {
  min-width: 0;
  padding: 15px 16px;
  background: var(--surface);
}

.metric-grid span,
.metric-grid small {
  display: block;
  color: var(--muted);
  font: 650 9px/1.3 var(--mono);
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.metric-grid strong {
  display: block;
  margin: 7px 0 5px;
  color: var(--amber-bright);
  font: 520 clamp(21px, 2.8vw, 34px)/1 var(--mono);
}

.metric-grid small {
  color: var(--dim);
  letter-spacing: 0.01em;
  text-transform: none;
}

.visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  gap: 16px;
}

.visual-panel,
.state-panel,
.spectrum-panel {
  min-width: 0;
  border: 1px solid var(--line);
  background: rgba(13, 17, 17, 0.91);
}

.panel-head {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.panel-head .eyebrow {
  margin-bottom: 6px;
}

.panel-head > span {
  flex: 0 0 auto;
  padding: 7px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
  font: 650 9px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.canvas-wrap,
.svg-wrap {
  height: clamp(390px, 39vw, 560px);
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at center, rgba(111, 170, 162, 0.035), transparent 56%),
    var(--canvas);
}

#atlasCanvas,
#spirograph {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

#atlasCanvas {
  cursor: grab;
  font-family: var(--mono);
}

#atlasCanvas:active {
  cursor: grabbing;
}

.canvas-hint {
  position: absolute;
  right: 12px;
  bottom: 10px;
  margin: 0;
  padding: 5px 7px;
  color: var(--dim);
  background: rgba(7, 10, 10, 0.78);
  font: 600 8px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
}

.legend-row {
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 9px 12px;
  border-top: 1px solid var(--line);
  color: #bdc6c3;
  font: 560 9px/1.2 var(--mono);
}

.legend-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend-mark {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-mark.fibre-0 {
  background: var(--fibre-0);
}

.legend-mark.fibre-1 {
  background: var(--fibre-1);
  border-radius: 0;
}

.legend-mark.fibre-2 {
  background: var(--fibre-2);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  border-radius: 0;
}

.spiro-guide {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
  opacity: 0.82;
}

.spiro-site {
  fill: var(--muted);
  opacity: 0.48;
}

.spiro-segment {
  fill: none;
  stroke: var(--line);
  stroke-width: 0.9;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.36;
}

.spiro-segment.is-visited {
  stroke-width: 1.8;
  opacity: 0.92;
}

.spiro-segment.is-visited[data-class="0"] {
  stroke: var(--fibre-0);
}

.spiro-segment.is-visited[data-class="1"] {
  stroke: var(--fibre-1);
}

.spiro-segment.is-visited[data-class="2"] {
  stroke: var(--fibre-2);
}

.spiro-event {
  opacity: 0.14;
}

.spiro-event.is-visited {
  opacity: 0.76;
}

.spiro-event[data-class="0"],
.spiro-ghost[data-class="0"],
.spiro-active-event[data-class="0"] {
  fill: var(--fibre-0);
}

.spiro-event[data-class="1"],
.spiro-ghost[data-class="1"],
.spiro-active-event[data-class="1"] {
  fill: var(--fibre-1);
}

.spiro-event[data-class="2"],
.spiro-ghost[data-class="2"],
.spiro-active-event[data-class="2"] {
  fill: var(--fibre-2);
}

.spiro-arm {
  stroke: var(--ink);
  stroke-width: 1;
  opacity: 0.66;
}

.spiro-active-site {
  fill: var(--canvas);
  stroke: var(--ink);
  stroke-width: 2;
}

.spiro-ghost {
  opacity: 0.22;
}

.spiro-ghost.is-current {
  opacity: 0.92;
}

.spiro-active-event {
  stroke: var(--canvas);
  stroke-width: 3;
}

.state-panel,
.spectrum-panel {
  margin-top: 16px;
}

.state-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: 0;
}

.state-grid div {
  min-width: 0;
  padding: 13px 14px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.state-grid div:nth-child(6) {
  border-right: 0;
}

.state-grid .root-vector {
  grid-column: 1 / -1;
  border-right: 0;
  border-bottom: 0;
}

.state-grid dt {
  margin-bottom: 7px;
  color: var(--muted);
  font: 650 8px/1 var(--mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.state-grid dd {
  min-width: 0;
  margin: 0;
  color: #c8d0cd;
  font: 560 10px/1.45 var(--mono);
  overflow-wrap: anywhere;
}

.root-vector dd {
  color: var(--amber-bright);
}

#spectrumCanvas {
  display: block;
  width: 100%;
  height: 92px;
}

.boundary-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  margin-top: 16px;
  padding: 21px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--oxide);
  background: rgba(18, 24, 23, 0.82);
}

.boundary-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--oxide-dark);
  color: var(--oxide);
  font: 500 25px/1 Georgia, serif;
}

.boundary-panel h2 {
  margin-bottom: 8px;
}

.boundary-panel p:last-child {
  max-width: 1120px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.68;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(18px, 3vw, 38px);
  border-top: 1px solid var(--line);
  color: var(--dim);
  background: var(--background);
  font: 560 9px/1.4 var(--mono);
}

footer p {
  margin: 0;
}

@media (max-width: 1260px) {
  .visual-grid {
    grid-template-columns: 1fr;
  }

  .visual-panel-spiro .svg-wrap {
    height: clamp(430px, 65vw, 620px);
  }

  .state-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .state-grid div:nth-child(3) {
    border-right: 0;
  }

  .state-grid div:nth-child(6) {
    border-right: 0;
  }
}

@media (max-width: 980px) {
  .masthead {
    position: relative;
  }

  .header-links a {
    display: none;
  }

  .app-shell {
    display: block;
  }

  .control-rack {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .rack-section,
  .rack-section:last-child {
    border: 1px solid var(--line);
  }

  .audio-controls {
    grid-row: span 2;
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .masthead {
    align-items: flex-start;
    padding: 15px;
  }

  .brand-mark {
    width: 58px;
    height: 52px;
  }

  .brand-copy > p:last-child,
  .header-links {
    display: none;
  }

  .control-rack {
    display: block;
    padding: 10px;
  }

  .rack-section {
    margin-bottom: 9px;
  }

  .workspace {
    padding: 15px 10px 34px;
  }

  .model-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .model-heading > p {
    text-align: left;
  }

  .metric-grid article {
    padding: 13px;
  }

  .panel-head {
    align-items: flex-start;
  }

  .panel-head > span {
    display: none;
  }

  .canvas-wrap,
  .svg-wrap,
  .visual-panel-spiro .svg-wrap {
    height: 390px;
  }

  .legend-row {
    justify-content: flex-start;
  }

  .state-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .state-grid div,
  .state-grid div:nth-child(3) {
    border-right: 1px solid var(--line);
  }

  .state-grid div:nth-child(even) {
    border-right: 0;
  }

  .boundary-panel {
    grid-template-columns: 1fr;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .model-switch,
  .check-grid,
  .two-controls,
  .export-grid {
    grid-template-columns: 1fr;
  }

  .metric-grid {
    grid-template-columns: 1fr 1fr;
  }

  .state-grid {
    grid-template-columns: 1fr;
  }

  .state-grid div,
  .state-grid div:nth-child(3),
  .state-grid div:nth-child(even) {
    border-right: 0;
  }
}

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