:root {
  --paper: #ded8c9;
  --paper-light: #f2eddf;
  --paper-bright: #fbf7eb;
  --ink: #171813;
  --ink-soft: #2a2b24;
  --muted: #6c6b60;
  --rule: rgba(23, 24, 19, 0.22);
  --rule-strong: rgba(23, 24, 19, 0.55);
  --acid: #e9ff43;
  --vermillion: #ff553e;
  --cobalt: #2664ff;
  --lagoon: #13c4a3;
  --orchid: #d845ff;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Figtree", sans-serif;
  --mono: "Martian Mono", monospace;
  --shadow: 8px 8px 0 var(--ink);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--paper);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(23, 24, 19, 0.045) 1px, transparent 1px),
    linear-gradient(rgba(23, 24, 19, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 28px 28px;
  font-family: var(--sans);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  content: "";
  opacity: 0.18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.72' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.23'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

button,
input,
summary {
  font: inherit;
}

button,
summary,
input[type="color"] {
  cursor: pointer;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible,
summary:focus-visible,
canvas:focus-visible,
a:focus-visible {
  outline: 3px solid var(--cobalt);
  outline-offset: 3px;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 66px;
  padding: 9px clamp(14px, 2.4vw, 38px);
  color: var(--paper-bright);
  background: rgba(23, 24, 19, 0.96);
  border-bottom: 1px solid rgba(242, 237, 223, 0.2);
  backdrop-filter: blur(12px);
}

.back-link,
.masthead,
.local-status {
  display: inline-flex;
  align-items: center;
}

.back-link {
  gap: 9px;
  width: max-content;
  color: rgba(242, 237, 223, 0.75);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 160ms ease, transform 160ms ease;
}

.back-link:hover {
  color: var(--paper-bright);
  transform: translateX(-2px);
}

.back-link > span:first-child {
  color: var(--acid);
  font-size: 18px;
  line-height: 1;
}

.masthead {
  justify-self: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.masthead-mark {
  width: 30px;
  height: 30px;
  overflow: visible;
}

.masthead-mark path {
  fill: none;
  stroke: var(--acid);
  stroke-linecap: round;
  stroke-width: 2;
}

.masthead-mark circle {
  fill: var(--vermillion);
  stroke: var(--ink);
  stroke-width: 1;
}

.local-status {
  justify-self: end;
  gap: 8px;
  color: var(--paper-bright);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.status-light {
  width: 8px;
  height: 8px;
  background: var(--acid);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(233, 255, 67, 0.12), 0 0 14px rgba(233, 255, 67, 0.66);
  animation: status-pulse 1.8s ease-in-out infinite;
}

.local-status.is-paused .status-light {
  background: var(--paper);
  box-shadow: 0 0 0 4px rgba(222, 216, 201, 0.12);
  animation: none;
}

.status-detail {
  padding-left: 9px;
  color: rgba(242, 237, 223, 0.45);
  border-left: 1px solid rgba(242, 237, 223, 0.28);
}

@keyframes status-pulse {
  0%, 100% { transform: scale(0.85); opacity: 0.68; }
  50% { transform: scale(1); opacity: 1; }
}

main {
  width: 100%;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.72fr);
  gap: clamp(28px, 5vw, 90px);
  align-items: end;
  width: min(1600px, calc(100% - clamp(28px, 5vw, 76px)));
  margin: 0 auto;
  padding: clamp(46px, 7vw, 104px) 0 clamp(36px, 5vw, 70px);
}

.eyebrow,
.metric-label,
.microcopy,
.proof-strip,
.chart-axis,
.fit-badge,
.coordinate-readout,
.keyboard-note,
.panel-number {
  font-family: var(--mono);
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.075em;
  text-transform: uppercase;
}

.intro .eyebrow::before {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 9px;
  background: var(--vermillion);
  content: "";
}

.intro h1 {
  max-width: 1050px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(48px, 6.3vw, 106px);
  font-weight: 300;
  line-height: 0.86;
  letter-spacing: -0.065em;
}

.intro h1 em {
  color: var(--cobalt);
  font-weight: 300;
}

.intro-note {
  padding: 0 0 5px clamp(20px, 3vw, 52px);
  border-left: 2px solid var(--ink);
}

.intro-note > p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(20px, 1.7vw, 28px);
  font-weight: 300;
  line-height: 1.22;
  letter-spacing: -0.025em;
}

.proof-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 24px;
}

.proof-strip span {
  padding: 7px 9px 6px;
  color: var(--ink-soft);
  background: rgba(242, 237, 223, 0.62);
  border: 1px solid var(--rule);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.025em;
  text-transform: uppercase;
}

.workbench {
  display: grid;
  grid-template-columns: 282px minmax(460px, 1fr) 314px;
  width: min(1600px, calc(100% - clamp(28px, 5vw, 76px)));
  margin: 0 auto;
  overflow: hidden;
  background: var(--paper-light);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow);
}

.tool-panel,
.telemetry-panel {
  min-width: 0;
  padding: 22px;
  background: var(--paper-light);
}

.tool-panel {
  border-right: 1px solid var(--ink);
}

.telemetry-panel {
  border-left: 1px solid var(--ink);
}

.panel-heading {
  display: grid;
  grid-template-columns: 27px 1fr;
  gap: 11px;
  align-items: start;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--rule-strong);
}

.panel-number {
  display: grid;
  width: 27px;
  height: 27px;
  place-items: center;
  color: var(--paper-bright);
  background: var(--ink);
  font-size: 9px;
  font-weight: 700;
}

.panel-heading .eyebrow {
  margin: 0 0 5px;
  color: var(--muted);
}

.panel-heading h2,
.field-toolbar h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.04em;
}

.control-section {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}

.control-section:last-child {
  border-bottom: 0;
}

.control-title-row,
.loss-heading-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.control-title-row h3 {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.015em;
  text-transform: uppercase;
}

.control-title-row output,
.microcopy {
  color: var(--muted);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.025em;
  text-align: right;
  text-transform: uppercase;
}

.swatch-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(42px, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.swatch,
.custom-swatch {
  position: relative;
  min-width: 44px;
  height: 44px;
  border: 1px solid var(--ink);
}

.swatch {
  background: var(--swatch);
}

.swatch[data-color="#ff553e"] { --swatch: #ff553e; }
.swatch[data-color="#2664ff"] { --swatch: #2664ff; }
.swatch[data-color="#161823"] { --swatch: #161823; }

.swatch::after {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 12px;
  height: 7px;
  border-bottom: 2px solid white;
  border-left: 2px solid white;
  content: "";
  opacity: 0;
  transform: translate(-50%, -62%) rotate(-45deg);
  filter: drop-shadow(0 1px 0 rgba(0, 0, 0, 0.5));
}

.swatch[aria-pressed="true"] {
  box-shadow: inset 0 0 0 3px var(--paper-light), inset 0 0 0 5px var(--ink);
}

.swatch[aria-pressed="true"]::after {
  opacity: 1;
}

.custom-swatch {
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    conic-gradient(from 45deg, #ff553e, #e9ff43, #13c4a3, #2664ff, #d845ff, #ff553e);
}

.custom-swatch input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  opacity: 0;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 13px;
  border: 1px solid var(--ink);
}

.segmented button {
  display: flex;
  min-width: 0;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 5px;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.015em;
  text-transform: uppercase;
  transition: color 140ms ease, background 140ms ease;
}

.segmented button:last-child {
  border-right: 0;
}

.segmented button:hover,
.segmented button.is-active {
  color: var(--paper-bright);
  background: var(--ink);
}

.brush-dot {
  display: inline-block;
  flex: 0 0 auto;
  background: currentColor;
  border-radius: 50%;
}

.brush-dot-small { width: 4px; height: 4px; }
.brush-dot-medium { width: 8px; height: 8px; }
.brush-dot-large { width: 12px; height: 12px; }

.preset-list {
  display: grid;
  gap: 7px;
  margin-top: 13px;
}

.preset-button {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 11px;
  align-items: center;
  width: 100%;
  min-height: 57px;
  padding: 6px;
  text-align: left;
  background: rgba(251, 247, 235, 0.45);
  border: 1px solid var(--rule);
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.preset-button:hover {
  background: var(--paper-bright);
  border-color: var(--ink);
  transform: translateX(2px);
}

.preset-button.is-active {
  background: var(--paper-bright);
  border-color: var(--ink);
  box-shadow: inset 3px 0 0 var(--vermillion);
}

.preset-button strong,
.preset-button small {
  display: block;
}

.preset-button strong {
  margin-bottom: 2px;
  font-size: 12px;
  line-height: 1.1;
}

.preset-button small {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 7px;
  letter-spacing: 0.025em;
  text-transform: uppercase;
}

.segmented.compact button {
  min-height: 40px;
}

.help-copy {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.45;
}

.field-panel {
  display: flex;
  min-width: 0;
  flex-direction: column;
  color: var(--paper-bright);
  background: var(--ink);
}

.field-toolbar {
  display: flex;
  min-height: 82px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 19px;
  border-bottom: 1px solid rgba(242, 237, 223, 0.24);
}

.field-toolbar .eyebrow {
  margin-bottom: 6px;
  color: rgba(242, 237, 223, 0.52);
}

.field-toolbar h2 {
  color: var(--paper-bright);
  font-size: 31px;
}

.field-status {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  color: var(--acid);
  border: 1px solid rgba(233, 255, 67, 0.42);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.training-indicator {
  width: 7px;
  height: 7px;
  background: var(--acid);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(233, 255, 67, 0.8);
  animation: status-pulse 1.2s ease-in-out infinite;
}

.field-status.is-paused {
  color: rgba(242, 237, 223, 0.62);
  border-color: rgba(242, 237, 223, 0.24);
}

.field-status.is-paused .training-indicator {
  background: rgba(242, 237, 223, 0.55);
  box-shadow: none;
  animation: none;
}

.field-frame {
  position: relative;
  min-height: 590px;
  flex: 1 1 auto;
  margin: 18px 18px 0;
  overflow: hidden;
  background: #22242b;
  border: 1px solid rgba(242, 237, 223, 0.55);
  isolation: isolate;
}

.field-frame::after {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  content: "";
  opacity: 0.13;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.3) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.3) 1px, transparent 1px);
  background-size: 48px 48px;
  mix-blend-mode: overlay;
}

#field-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
}

.coordinate-readout {
  position: absolute;
  z-index: 5;
  right: 15px;
  bottom: 14px;
  display: flex;
  gap: 9px;
  padding: 7px 8px;
  color: rgba(251, 247, 235, 0.8);
  background: rgba(23, 24, 19, 0.54);
  border: 1px solid rgba(251, 247, 235, 0.22);
  font-size: 7px;
  letter-spacing: 0.02em;
  pointer-events: none;
  backdrop-filter: blur(5px);
}

.field-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(242, 237, 223, 0.2);
}

.action-group {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.action-button {
  min-height: 40px;
  padding: 9px 12px;
  color: var(--paper-bright);
  background: transparent;
  border: 1px solid rgba(242, 237, 223, 0.36);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.025em;
  text-transform: uppercase;
  transition: color 140ms ease, background 140ms ease, border-color 140ms ease;
}

.action-button:hover:not(:disabled) {
  color: var(--ink);
  background: var(--paper-bright);
  border-color: var(--paper-bright);
}

.action-button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.primary-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  background: var(--acid);
  border-color: var(--acid);
}

.pause-icon {
  display: block;
  width: 8px;
  height: 11px;
  border-right: 3px solid currentColor;
  border-left: 3px solid currentColor;
}

.primary-action.is-paused .pause-icon {
  width: 0;
  height: 0;
  border: 0;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-left: 9px solid currentColor;
}

.text-action {
  min-height: 38px;
  padding: 5px 3px;
  color: rgba(242, 237, 223, 0.68);
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(242, 237, 223, 0.3);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.025em;
  text-transform: uppercase;
}

.text-action:hover {
  color: var(--acid);
  border-color: var(--acid);
}

.canvas-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding: 13px 18px 15px;
  color: rgba(242, 237, 223, 0.6);
  font-size: 10px;
}

.canvas-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend-example {
  width: 10px;
  height: 10px;
  background: var(--vermillion);
  border: 2px solid var(--paper-bright);
  border-radius: 50%;
}

.legend-field {
  width: 14px;
  height: 8px;
  background: linear-gradient(90deg, var(--cobalt), var(--orchid), var(--vermillion));
}

.keyboard-note {
  margin-left: auto;
  font-size: 6px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.telemetry-panel .panel-heading {
  margin-bottom: 20px;
}

.loss-card {
  padding: 15px;
  color: var(--paper-bright);
  background: var(--ink);
  border: 1px solid var(--ink);
}

.metric-label {
  margin: 0 0 3px;
  color: rgba(242, 237, 223, 0.5);
  font-size: 7px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

#loss-value {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 300;
  letter-spacing: -0.04em;
}

.fit-badge {
  padding: 6px 7px;
  color: var(--acid);
  border: 1px solid rgba(233, 255, 67, 0.36);
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

#loss-canvas {
  display: block;
  width: 100%;
  height: 82px;
  margin-top: 12px;
}

.chart-axis {
  display: flex;
  justify-content: space-between;
  color: rgba(242, 237, 223, 0.38);
  font-size: 6px;
  letter-spacing: 0.025em;
  text-transform: uppercase;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 13px 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}

.stat-grid > div {
  min-width: 0;
  padding: 12px;
  background: rgba(251, 247, 235, 0.32);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.stat-grid dt {
  margin-bottom: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.stat-grid dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 24px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
}

.probe-card,
.architecture-card {
  padding: 14px;
  background: rgba(251, 247, 235, 0.35);
  border: 1px solid var(--rule-strong);
}

.probe-comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 8px;
  align-items: center;
  margin-top: 13px;
}

.probe-comparison > div {
  min-width: 0;
}

.color-chip {
  display: block;
  width: 100%;
  height: 37px;
  margin-bottom: 7px;
  border: 1px solid var(--ink);
}

.predicted-chip {
  background: #5c5c5c;
}

.example-chip {
  background: #161823;
  background-image: repeating-linear-gradient(135deg, transparent 0 5px, rgba(255, 255, 255, 0.16) 5px 7px);
}

.probe-comparison p {
  margin: 0 0 2px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.probe-comparison strong {
  display: block;
  overflow: hidden;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.probe-arrow {
  color: var(--muted);
  font-size: 17px;
}

.architecture-card {
  margin-top: 13px;
}

.network-diagram {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  margin: 15px 0 13px;
}

.network-diagram span {
  display: grid;
  min-width: 37px;
  height: 48px;
  padding: 5px;
  align-content: center;
  text-align: center;
  background: var(--paper-bright);
  border: 1px solid var(--ink);
}

.network-diagram span:nth-of-type(3),
.network-diagram span:nth-of-type(4) {
  color: var(--paper-bright);
  background: var(--cobalt);
}

.network-diagram .rgb-node {
  color: var(--ink);
  background: linear-gradient(180deg, var(--vermillion) 0 33%, var(--lagoon) 33% 66%, var(--cobalt) 66%);
}

.network-diagram b {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  line-height: 1;
}

.network-diagram small {
  margin-top: 2px;
  font-family: var(--mono);
  font-size: 5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.network-diagram i {
  height: 1px;
  flex: 1 1 8px;
  background: var(--ink);
}

.architecture-copy,
.method-note p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.5;
}

.method-note {
  margin-top: 13px;
  background: var(--acid);
  border: 1px solid var(--ink);
}

.method-note summary {
  position: relative;
  padding: 12px 31px 12px 13px;
  font-size: 10px;
  font-weight: 700;
  list-style: none;
}

.method-note summary::-webkit-details-marker {
  display: none;
}

.method-note summary::after {
  position: absolute;
  top: 50%;
  right: 13px;
  content: "+";
  font-family: var(--mono);
  font-size: 15px;
  transform: translateY(-50%);
}

.method-note[open] summary::after {
  content: "−";
}

.method-note p {
  padding: 0 13px 13px;
  color: var(--ink-soft);
}

.method-footer {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  width: min(1600px, calc(100% - clamp(28px, 5vw, 76px)));
  margin: 0 auto;
  padding: 34px 0 48px;
  color: var(--muted);
  font-size: 11px;
}

.method-footer p {
  margin: 0;
}

.method-footer span {
  margin-right: 10px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

@media (max-width: 1220px) {
  .workbench {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .telemetry-panel {
    display: grid;
    grid-column: 1 / -1;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 14px;
    border-top: 1px solid var(--ink);
    border-left: 0;
  }

  .telemetry-panel .panel-heading {
    grid-column: 1 / -1;
    margin-bottom: 0;
  }

  .loss-card,
  .stat-grid,
  .probe-card,
  .architecture-card,
  .method-note {
    margin: 0;
  }

  .stat-grid {
    align-self: stretch;
  }

  .architecture-card {
    grid-column: span 2;
  }

  .method-note {
    align-self: start;
  }
}

@media (max-width: 900px) {
  .intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .intro-note {
    max-width: 620px;
  }

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

  .architecture-card {
    grid-column: auto;
  }

  .method-note {
    grid-column: 1 / -1;
  }

  .field-frame {
    min-height: 520px;
  }

  .field-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .secondary-actions {
    width: 100%;
  }
}

@media (max-width: 720px) {
  .topbar {
    grid-template-columns: auto 1fr auto;
    min-height: 58px;
    padding: 8px 12px;
  }

  .back-link span:last-child,
  .status-detail {
    display: none;
  }

  .back-link {
    width: 40px;
    height: 40px;
    justify-content: center;
  }

  .masthead {
    gap: 7px;
    justify-self: start;
    font-size: 22px;
  }

  .masthead-mark {
    width: 26px;
    height: 26px;
  }

  .local-status {
    font-size: 7px;
  }

  .intro,
  .workbench,
  .method-footer {
    width: calc(100% - 24px);
  }

  .intro {
    padding: 42px 0 34px;
  }

  .intro h1 {
    font-size: clamp(43px, 13vw, 68px);
    line-height: 0.91;
  }

  .intro-note {
    padding-left: 18px;
  }

  .workbench {
    display: flex;
    flex-direction: column;
    box-shadow: 5px 5px 0 var(--ink);
  }

  .field-panel {
    order: 1;
  }

  .tool-panel {
    order: 2;
    border-top: 1px solid var(--ink);
    border-right: 0;
  }

  .telemetry-panel {
    order: 3;
    display: grid;
    grid-template-columns: 1fr;
    padding: 18px;
  }

  .telemetry-panel .panel-heading,
  .method-note {
    grid-column: auto;
  }

  .field-toolbar {
    min-height: 75px;
    padding: 14px;
  }

  .field-toolbar h2 {
    font-size: 27px;
  }

  .field-frame {
    min-height: 430px;
    margin: 12px 12px 0;
  }

  .field-actions {
    padding: 12px;
  }

  .action-button {
    min-height: 44px;
  }

  .secondary-actions {
    justify-content: space-between;
  }

  .text-action {
    min-height: 44px;
  }

  .canvas-legend {
    padding: 12px;
  }

  .keyboard-note {
    display: none !important;
  }

  .swatch-list {
    grid-template-columns: repeat(7, minmax(38px, 1fr));
  }

  .swatch,
  .custom-swatch {
    min-width: 38px;
    height: 46px;
  }

  .tool-panel {
    padding: 18px;
  }

  .preset-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .preset-button {
    grid-template-columns: 1fr;
    align-content: start;
  }

  .method-footer {
    align-items: flex-start;
    flex-direction: column;
    padding-bottom: calc(32px + env(safe-area-inset-bottom));
  }
}

@media (max-width: 440px) {
  .local-status span:not(.status-light) {
    display: none;
  }

  .intro h1 {
    font-size: 44px;
  }

  .intro-note > p {
    font-size: 20px;
  }

  .proof-strip span {
    font-size: 6px;
  }

  .field-status {
    padding: 7px;
    font-size: 8px;
  }

  .field-frame {
    min-height: 390px;
  }

  .action-group:first-child {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
  }

  .primary-action {
    grid-column: 1 / -1;
    justify-content: center;
  }

  .swatch-list {
    grid-template-columns: repeat(4, 1fr);
  }

  .preset-list {
    grid-template-columns: 1fr;
  }

  .preset-button {
    grid-template-columns: 70px 1fr;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* Doodle Apprentice */

.intro-note .truth-note {
  margin-top: 17px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.025em;
  line-height: 1.55;
  text-transform: uppercase;
}

.tool-intro,
.telemetry-explainer {
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
}

.telemetry-explainer {
  margin: 0 0 16px;
}

.swatch[data-color="#13a98e"] { --swatch: #13a98e; }
.swatch[data-color="#b632d5"] { --swatch: #b632d5; }

.custom-swatch i {
  position: relative;
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  color: var(--ink);
  background: var(--paper-bright);
  border: 1px solid var(--ink);
  font-style: normal;
  font-weight: 700;
  line-height: 1;
}

.preset-doodles .preset-button {
  grid-template-columns: 52px 1fr;
}

.preset-doodle {
  display: grid;
  width: 44px;
  height: 42px;
  place-items: center;
  color: var(--paper-bright);
  background: var(--ink);
  border: 1px solid var(--ink);
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1;
}

.preset-heart { color: var(--vermillion); }
.preset-smiley { color: var(--acid); }
.preset-star { color: #6f91ff; }

.advanced-tools {
  margin-top: 15px;
  border: 1px solid var(--rule-strong);
}

.advanced-tools > summary {
  position: relative;
  padding: 12px 34px 12px 13px;
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.035em;
  list-style: none;
  text-transform: uppercase;
}

.advanced-tools > summary::-webkit-details-marker {
  display: none;
}

.advanced-tools > summary::after {
  position: absolute;
  top: 50%;
  right: 13px;
  content: "+";
  font-size: 16px;
  transform: translateY(-50%);
}

.advanced-tools[open] > summary::after {
  content: "−";
}

.advanced-tools-body {
  padding: 0 13px;
  border-top: 1px solid var(--rule);
}

.advanced-tools .control-section {
  padding: 16px 0;
}

.learning-loop {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 9px;
  align-items: center;
  margin: 0;
  padding: 14px 18px;
  color: rgba(242, 237, 223, 0.48);
  border-bottom: 1px solid rgba(242, 237, 223, 0.2);
  list-style: none;
}

.mobile-tool-note {
  display: none;
}

.learning-loop li:not(.loop-arrow) {
  display: grid;
  grid-template-columns: 25px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  min-width: 0;
}

.learning-loop li > span {
  display: grid;
  width: 25px;
  height: 25px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 700;
}

.learning-loop strong,
.learning-loop small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.learning-loop strong {
  color: inherit;
  font-size: 10px;
}

.learning-loop small {
  margin-top: 1px;
  font-family: var(--mono);
  font-size: 6px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.learning-loop .is-active {
  color: var(--acid);
}

.learning-loop .is-complete {
  color: var(--paper-bright);
}

.learning-loop .is-complete > span {
  color: var(--ink);
  background: var(--acid);
  border-color: var(--acid);
}

.loop-arrow {
  color: rgba(242, 237, 223, 0.26);
  font-size: 17px;
}

.lesson-card {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 3px 14px;
  align-items: baseline;
  margin: 14px 18px 0;
  padding: 12px 14px;
  color: var(--ink);
  background: var(--acid);
  border: 1px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.28);
  transform: rotate(-0.25deg);
}

.lesson-card > span {
  grid-row: 1 / 3;
  align-self: stretch;
  padding-right: 13px;
  border-right: 1px solid rgba(23, 24, 19, 0.38);
  font-family: var(--mono);
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lesson-card strong {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.025em;
}

.lesson-card p {
  margin: 0;
  font-size: 9px;
  line-height: 1.35;
}

.lesson-card.is-complete {
  background: var(--paper-bright);
}

.canvas-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 42px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 18px;
}

.canvas-pane {
  min-width: 0;
}

.canvas-pane-heading {
  display: grid;
  grid-template-columns: 27px minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  min-height: 47px;
  padding: 7px 8px;
  color: var(--ink);
  background: var(--paper-light);
  border: 1px solid var(--ink);
  border-bottom: 0;
}

.pane-number {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  color: var(--paper-bright);
  background: var(--ink);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 700;
}

.canvas-pane-heading p,
.canvas-pane-heading h3 {
  margin: 0;
}

.canvas-pane-heading p {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.025em;
  text-transform: uppercase;
}

.canvas-pane-heading h3 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.035em;
}

.canvas-pane-heading output {
  padding: 5px 6px;
  color: var(--muted);
  border: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 6px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.teaching-frame,
.prediction-frame {
  position: relative;
  width: 100%;
  min-height: 0;
  aspect-ratio: 4 / 3;
  margin: 0;
  overflow: hidden;
  background: #ede7d6;
  border: 1px solid rgba(242, 237, 223, 0.55);
  isolation: isolate;
}

.teaching-frame {
  border-color: var(--ink);
}

.field-frame::after {
  opacity: 0.055;
  background-size: 30px 30px;
  mix-blend-mode: multiply;
}

#teaching-canvas,
#field-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
}

#teaching-canvas {
  touch-action: none;
  cursor: crosshair;
}

#teaching-canvas.is-painting {
  cursor: none;
}

#field-canvas {
  touch-action: auto;
  cursor: default;
}

.canvas-empty,
.source-hidden {
  position: absolute;
  inset: 50% auto auto 50%;
  z-index: 5;
  display: grid;
  width: min(220px, calc(100% - 26px));
  padding: 13px;
  color: var(--ink);
  text-align: center;
  background: rgba(251, 247, 235, 0.94);
  border: 1px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(23, 24, 19, 0.4);
  pointer-events: none;
  transform: translate(-50%, -50%) rotate(-1deg);
}

.canvas-empty[hidden],
.source-hidden[hidden] {
  display: none;
}

.canvas-empty span,
.source-hidden span {
  margin-bottom: 4px;
  color: var(--cobalt);
  font-family: var(--mono);
  font-size: 6px;
  font-weight: 700;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.canvas-empty strong,
.source-hidden strong {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  line-height: 1.05;
}

.canvas-empty small,
.source-hidden small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 8px;
  line-height: 1.35;
}

.canvas-empty-dark {
  color: var(--paper-bright);
  background: rgba(23, 24, 19, 0.94);
  border-color: var(--paper-bright);
  box-shadow: 4px 4px 0 rgba(255, 85, 62, 0.82);
}

.canvas-empty-dark span { color: var(--acid); }
.canvas-empty-dark small { color: rgba(242, 237, 223, 0.68); }

.source-hidden {
  color: var(--paper-bright);
  background: var(--cobalt);
  border-color: var(--paper-bright);
}

.source-hidden span,
.source-hidden small {
  color: rgba(251, 247, 235, 0.82);
}

.prediction-stamp {
  position: absolute;
  z-index: 5;
  right: 10px;
  bottom: 10px;
  display: grid;
  padding: 7px 8px;
  color: var(--paper-bright);
  background: rgba(23, 24, 19, 0.84);
  border: 1px solid rgba(251, 247, 235, 0.55);
  pointer-events: none;
}

.prediction-stamp[hidden] {
  display: none;
}

.prediction-stamp span {
  color: rgba(251, 247, 235, 0.62);
  font-family: var(--mono);
  font-size: 5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.prediction-stamp strong {
  font-size: 9px;
}

.causal-arrow {
  display: grid;
  justify-items: center;
  color: var(--acid);
}

.causal-arrow span {
  font-family: var(--mono);
  font-size: 6px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.causal-arrow i {
  margin-top: 7px;
  font-size: 27px;
  font-style: normal;
  line-height: 1;
}

.pane-caption {
  display: flex;
  min-height: 35px;
  align-items: center;
  gap: 7px;
  margin: 0;
  padding: 7px 8px;
  color: rgba(242, 237, 223, 0.62);
  border: 1px solid rgba(242, 237, 223, 0.25);
  border-top: 0;
  font-size: 8px;
  line-height: 1.35;
}

.pane-caption .legend-example,
.pane-caption .legend-field {
  flex: 0 0 auto;
}

.legend-example {
  background: var(--ink);
  border-color: var(--vermillion);
}

.legend-field {
  background: linear-gradient(90deg, #ede7d6, #6475b7, var(--cobalt));
  border: 1px solid rgba(242, 237, 223, 0.45);
}

.field-actions {
  border-top: 1px solid rgba(242, 237, 223, 0.2);
}

.text-action:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.probe-comparison {
  grid-template-columns: 1fr auto 1fr;
}

@media (max-width: 1220px) {
  .telemetry-explainer {
    align-self: center;
    margin: 0;
  }

  .canvas-pair {
    padding: 15px;
  }
}

@media (max-width: 900px) {
  .learning-loop {
    gap: 5px;
  }

  .learning-loop li:not(.loop-arrow) {
    grid-template-columns: 21px minmax(0, 1fr);
    gap: 5px;
  }

  .learning-loop li > span {
    width: 21px;
    height: 21px;
  }

  .learning-loop small {
    display: none;
  }

  .canvas-pair {
    grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr);
    gap: 6px;
    padding: 13px;
  }

  .causal-arrow span {
    display: none;
  }

  .canvas-pane-heading {
    grid-template-columns: 23px minmax(0, 1fr);
  }

  .canvas-pane-heading output {
    display: none;
  }
}

@media (max-width: 720px) {
  .tool-panel {
    order: 2;
    border-top: 1px solid var(--ink);
    border-bottom: 0;
  }

  .field-panel {
    order: 1;
  }

  .telemetry-panel {
    order: 3;
  }

  .tool-intro {
    margin-top: 13px;
  }

  .control-section {
    padding: 16px 0;
  }

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

  .preset-doodles .preset-button {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .preset-doodle {
    width: 100%;
  }

  .field-toolbar {
    min-height: 68px;
  }

  .mobile-tool-note {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: 0;
    padding: 9px 12px;
    color: rgba(242, 237, 223, 0.72);
    border-bottom: 1px solid rgba(242, 237, 223, 0.2);
    font-family: var(--mono);
    font-size: 7px;
    letter-spacing: 0.025em;
    text-transform: uppercase;
  }

  .mobile-tool-note strong {
    color: var(--paper-bright);
  }

  .mobile-tool-note a {
    color: var(--acid);
    font-weight: 700;
    text-decoration: none;
  }

  .learning-loop {
    padding: 10px 12px;
  }

  .lesson-card {
    grid-template-columns: 1fr;
    gap: 3px;
    margin: 11px 12px 0;
    padding: 10px 11px;
  }

  .lesson-card > span {
    grid-row: auto;
    padding: 0 0 5px;
    border-right: 0;
    border-bottom: 1px solid rgba(23, 24, 19, 0.28);
  }

  .lesson-card strong {
    font-size: 17px;
  }

  .canvas-pair {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px;
    padding: 14px 12px;
  }

  .causal-arrow {
    display: none;
  }

  .canvas-pane-heading {
    min-height: 43px;
    padding: 6px;
  }

  .canvas-pane-heading p {
    display: none;
  }

  .canvas-pane-heading h3 {
    font-size: 15px;
  }

  .teaching-frame,
  .prediction-frame,
  .field-frame {
    min-height: 0;
    margin: 0;
    aspect-ratio: 4 / 3;
  }

  .canvas-empty,
  .source-hidden {
    width: calc(100% - 16px);
    padding: 8px 6px;
    box-shadow: 2px 2px 0 rgba(23, 24, 19, 0.42);
  }

  .canvas-empty strong,
  .source-hidden strong {
    font-size: 14px;
  }

  .canvas-empty small,
  .source-hidden small {
    display: none;
  }

  .coordinate-readout,
  .prediction-stamp {
    display: none;
  }

  .pane-caption {
    min-height: 38px;
    padding: 6px;
    font-size: 7px;
  }

  .field-actions {
    padding: 12px;
  }

  .secondary-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 440px) {
  .intro h1 {
    font-size: 42px;
  }

  .field-toolbar h2 {
    font-size: 23px;
  }

  .field-status {
    max-width: 104px;
  }

  .learning-loop strong {
    font-size: 8px;
  }

  .loop-arrow {
    font-size: 12px;
  }

  .lesson-card p {
    display: none;
  }

  .canvas-pair {
    grid-template-columns: 1fr;
    gap: 5px;
    padding: 11px 7px;
  }

  .teaching-frame,
  .prediction-frame {
    aspect-ratio: 4 / 3;
  }

  .pane-number {
    width: 20px;
    height: 20px;
  }

  .canvas-pane-heading {
    grid-template-columns: 20px minmax(0, 1fr);
    gap: 4px;
  }

  .canvas-pane-heading h3 {
    font-size: 13px;
  }

  .pane-caption {
    min-height: 32px;
    font-size: 8px;
  }

  .action-group:first-child {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .primary-action {
    grid-column: auto;
  }

  .action-button {
    padding: 8px 5px;
    font-size: 8px;
  }

  .pause-icon {
    display: none;
  }
}