:root {
  color-scheme: dark;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  --background: #0b0d12;
  --panel: rgba(19, 23, 32, 0.88);
  --panel-strong: #151a24;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f4f7ff;
  --muted: #98a2b5;
  --accent: #4f8cff;
  --accent-strong: #73a2ff;
  --good: #48d69b;
  --bad: #ff687d;
  --warning: #ffbd57;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(50, 97, 193, 0.2), transparent 34rem),
    radial-gradient(circle at 90% 80%, rgba(127, 64, 176, 0.12), transparent 32rem),
    var(--background);
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="range"],
input[type="color"] {
  accent-color: var(--accent);
}

.app-shell {
  width: min(1600px, 100%);
  margin: 0 auto;
  padding: 28px clamp(16px, 3vw, 44px) 36px;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 3.25rem);
  font-weight: 680;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

h1 span {
  color: var(--muted);
  font-weight: 430;
}

.status-stack {
  display: grid;
  justify-items: end;
  gap: 8px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 34px;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
  font-size: 0.82rem;
  font-weight: 650;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warning);
  box-shadow: 0 0 0 5px rgba(255, 189, 87, 0.12);
}

.status-pill[data-state="ready"] .status-dot {
  background: var(--good);
  box-shadow: 0 0 0 5px rgba(72, 214, 155, 0.12);
}

.status-pill[data-state="error"] .status-dot {
  background: var(--bad);
  box-shadow: 0 0 0 5px rgba(255, 104, 125, 0.12);
}

.version-line,
.canvas-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
  gap: 18px;
}

.control-panel,
.canvas-panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(18px);
}

.control-panel {
  display: flex;
  flex-direction: column;
  padding: 20px;
}

fieldset {
  display: grid;
  gap: 16px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

fieldset:disabled {
  opacity: 0.52;
}

.control-group {
  display: grid;
  gap: 8px;
}

.control-label,
.control-heading {
  color: #dfe6f4;
  font-size: 0.78rem;
  font-weight: 650;
}

.control-heading,
.color-control,
.range-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.control-heading output,
.range-row output,
.color-control output {
  color: var(--muted);
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
}

.control-grid {
  display: grid;
  gap: 14px;
}

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

select {
  width: 100%;
  height: 42px;
  padding: 0 38px 0 12px;
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  outline: none;
  background: #111620;
}

select:focus-visible,
button:focus-visible,
input:focus-visible,
.file-button:focus-within {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

input[type="range"] {
  width: 100%;
  min-width: 0;
}

.range-row.compact input {
  flex: 1 1 auto;
}

input[type="color"] {
  width: 44px;
  height: 36px;
  padding: 3px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #111620;
  cursor: pointer;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 10px;
}

.button {
  min-height: 40px;
  padding: 9px 14px;
  color: var(--text);
  border: 1px solid transparent;
  border-radius: 10px;
  font-weight: 680;
  cursor: pointer;
}

.button:disabled {
  cursor: wait;
}

.button.primary {
  background: linear-gradient(135deg, #397dfd, #655df7);
  box-shadow: 0 8px 24px rgba(61, 113, 246, 0.24);
}

.button.secondary {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.045);
}

.file-button {
  display: grid;
  gap: 3px;
  padding: 11px 12px;
  border: 1px dashed var(--line-strong);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.025);
  cursor: pointer;
}

.file-button span {
  font-size: 0.8rem;
  font-weight: 650;
}

.file-button small {
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.4;
}

#brushFileInput {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.notes {
  margin-top: auto;
  padding-top: 24px;
}

.notes h2 {
  margin: 0 0 8px;
  font-size: 0.8rem;
}

.notes p {
  margin: 0 0 9px;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.55;
}

.notes .warning-note {
  color: #c7ad7d;
}

.canvas-panel {
  min-width: 0;
  padding: 12px;
}

.canvas-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 3 / 2;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 13px;
  background-color: #f4f5f8;
  background-image:
    linear-gradient(45deg, #dfe2e8 25%, transparent 25%),
    linear-gradient(-45deg, #dfe2e8 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #dfe2e8 75%),
    linear-gradient(-45deg, transparent 75%, #dfe2e8 75%);
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  background-size: 20px 20px;
  isolation: isolate;
}

#paintCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

.telemetry {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 4px 12px;
  margin: 0;
  padding: 9px 11px;
  color: #d9e0ee;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: rgba(12, 15, 21, 0.78);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.22);
  pointer-events: none;
  backdrop-filter: blur(10px);
}

.telemetry div {
  display: flex;
  gap: 5px;
  font-size: 0.62rem;
  font-variant-numeric: tabular-nums;
}

.telemetry dt {
  color: #8792a7;
}

.telemetry dd {
  margin: 0;
}

.error-panel {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-content: center;
  justify-items: center;
  padding: 28px;
  color: var(--text);
  text-align: center;
  background: rgba(11, 13, 18, 0.9);
  backdrop-filter: blur(10px);
}

.error-panel[hidden] {
  display: none;
}

.error-panel strong {
  font-size: 1.1rem;
}

.error-panel p {
  max-width: 620px;
  margin: 10px 0 18px;
  color: #ff9baa;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.76rem;
  line-height: 1.5;
}

.canvas-hint {
  padding: 10px 5px 0;
  text-align: right;
}

.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;
}

@media (max-width: 920px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .status-stack {
    justify-items: start;
  }

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

  .control-panel {
    order: 2;
  }

  .notes {
    margin-top: 0;
  }
}

@media (max-width: 560px) {
  .app-shell {
    padding-inline: 10px;
  }

  .topbar {
    padding-inline: 6px;
  }

  h1 span {
    display: block;
    margin-top: 5px;
  }

  .telemetry {
    grid-template-columns: repeat(2, auto);
  }

  .canvas-hint {
    text-align: left;
  }
}




.brush-catalog {
  display: grid;
  gap: 10px;
  min-width: 0;
  padding-top: 2px;
}

.brush-catalog__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
}

.brush-catalog__header h2 {
  margin: 2px 0 0;
  color: var(--text);
  font-size: 0.96rem;
  font-weight: 720;
}

.brush-catalog__header output,
.brush-catalog__state {
  color: var(--muted);
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
}

.brush-catalog__filters {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 8px;
}

.brush-catalog input[type="search"] {
  width: 100%;
  height: 38px;
  padding: 0 11px;
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  outline: none;
  background: #111620;
}

.brush-catalog select {
  height: 38px;
  padding-left: 10px;
  font-size: 0.74rem;
}

.brush-catalog__verify {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 0.69rem;
  cursor: pointer;
}

.brush-catalog__verify input {
  margin: 0;
}

.brush-catalog__state {
  min-height: 1.15em;
}

.brush-catalog[data-state="error"] .brush-catalog__state {
  color: var(--bad);
}

.brush-catalog[data-state="loading"] .brush-catalog__state {
  color: var(--warning);
}

.brush-catalog__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  max-height: 300px;
  padding: 2px 5px 2px 2px;
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.brush-card {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  min-width: 0;
  min-height: 54px;
  padding: 4px;
  color: var(--text);
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
  cursor: pointer;
}

.brush-card:hover {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.055);
}

.brush-card[aria-pressed="true"] {
  border-color: var(--accent-strong);
  background: rgba(79, 140, 255, 0.14);
  box-shadow: inset 0 0 0 1px rgba(115, 162, 255, 0.2);
}

.brush-card:disabled {
  cursor: wait;
  opacity: 0.55;
}

.brush-card__preview,
.brush-catalog__selected img {
  display: block;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(45deg, #dfe2e8 25%, transparent 25%),
    linear-gradient(-45deg, #dfe2e8 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #dfe2e8 75%),
    linear-gradient(-45deg, transparent 75%, #dfe2e8 75%),
    #f4f5f8;
  background-position: 0 0, 0 6px, 6px -6px, -6px 0;
  background-size: 12px 12px;
}

.brush-card__preview {
  width: 48px;
  height: 48px;
}

.brush-card__copy {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.brush-card__name,
.brush-card__group {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brush-card__name {
  font-size: 0.72rem;
  font-weight: 670;
}

.brush-card__group {
  color: var(--muted);
  font-size: 0.61rem;
}

.brush-catalog__empty {
  grid-column: 1 / -1;
  margin: 20px 0;
  color: var(--muted);
  font-size: 0.74rem;
  text-align: center;
}

.brush-catalog__selected {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  min-height: 66px;
  margin: 0;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.025);
}

.brush-catalog__selected:has(img[hidden]) {
  grid-template-columns: 1fr;
}

.brush-catalog__selected img {
  width: 56px;
  height: 56px;
}

.brush-catalog__selected strong {
  display: block;
  overflow: hidden;
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brush-catalog__selected p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.63rem;
  line-height: 1.4;
}

@media (max-width: 420px) {
  .brush-catalog__filters,
  .brush-catalog__list {
    grid-template-columns: 1fr;
  }
}




.compact-control {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

@media (min-width: 1250px) {
  .two-columns {
    grid-template-columns: 1fr 1fr;
  }
}