:root {
  color-scheme: dark;
  --bg: #090d18;
  --surface: #111827;
  --surface-raised: #172033;
  --surface-soft: #1d2940;
  --text: #f8fafc;
  --text-muted: #b8c3d9;
  --stroke: #64748b;
  --stroke-soft: #2a3953;
  --brand: #78d9ff;
  --brand-strong: #0c789f;
  --focus: #fbbf24;
  --danger: #ff8d9c;
  --success: #62e2ba;
  --shadow: 0 16px 45px rgba(0, 0, 0, 0.28);
  --radius-sm: 8px;
  --radius-md: 16px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  font-family: Inter, "Segoe UI", "Microsoft YaHei UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 78% -10%, rgba(68, 125, 185, 0.2), transparent 35rem),
    linear-gradient(180deg, #0a0f1d, var(--bg));
  line-height: 1.5;
}

button,
select,
input {
  font: inherit;
}

button,
select,
input[type="range"],
summary,
.file-button {
  min-height: 48px;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible,
.file-button:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.app-header,
main,
footer {
  width: min(1440px, calc(100% - 48px));
  margin-inline: auto;
}

.app-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-5) var(--space-4);
}

.eyebrow {
  margin: 0 0 var(--space-1);
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: var(--space-1);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 4px;
  font-size: 1.2rem;
}

h3 {
  margin-bottom: var(--space-2);
  font-size: 1rem;
}

.lede,
.section-heading p,
.playfield-toolbar p {
  margin-bottom: 0;
  color: var(--text-muted);
}

.header-status {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 10px;
  min-height: 48px;
  padding: 0 var(--space-2);
  color: var(--text-muted);
  border: 1px solid var(--stroke);
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.72);
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 14px var(--success);
}

.header-status.is-error .status-dot {
  background: var(--danger);
  box-shadow: none;
}

.control-bar,
.playfield-panel,
.inspector {
  border: 1px solid var(--stroke-soft);
  border-radius: var(--radius-md);
  background: rgba(17, 24, 39, 0.88);
  box-shadow: var(--shadow);
}

.control-bar {
  padding: var(--space-3);
}

.section-heading,
.playfield-toolbar,
.inspector-heading,
.health-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.version-tabs,
.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.version-button,
.button,
.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-2);
  color: var(--text);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.version-button:hover,
.button.secondary:hover,
.file-button:hover {
  background: var(--surface-soft);
  border-color: var(--brand);
}

.version-button:active,
.button:active,
.file-button:active {
  transform: translateY(1px);
}

.version-button.is-active {
  color: #06131c;
  border-color: var(--brand);
  background: var(--brand);
  font-weight: 700;
}

.button.primary {
  color: #04151e;
  border-color: var(--brand);
  background: var(--brand);
  font-weight: 700;
}

.button.primary:hover {
  background: #a3e7ff;
}

.controls-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.45fr) minmax(150px, 0.7fr) minmax(210px, 1fr) auto;
  align-items: end;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.field {
  display: grid;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.field span {
  display: flex;
  justify-content: space-between;
  gap: var(--space-1);
}

select {
  width: 100%;
  padding: 0 40px 0 12px;
  color: var(--text);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
}

input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: var(--brand);
  cursor: pointer;
}

output {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.error-box {
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding: var(--space-2);
  color: #ffe7eb;
  border-left: 4px solid var(--danger);
  background: rgba(121, 33, 50, 0.28);
}

.error-box:not([hidden]) {
  display: flex;
  flex-wrap: wrap;
}

.file-button {
  position: relative;
  margin-left: auto;
  overflow: hidden;
}

.file-button input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
  align-items: start;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.playfield-panel {
  min-width: 0;
  overflow: hidden;
}

.playfield-toolbar {
  min-height: 90px;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--stroke-soft);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-1);
}

.tag,
.version-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 2px 10px;
  color: var(--brand);
  border: 1px solid #3c7990;
  border-radius: 999px;
  background: rgba(47, 151, 190, 0.12);
  font-size: 0.78rem;
  white-space: nowrap;
}

.canvas-wrap {
  position: relative;
  padding: var(--space-2);
  background: #070b15;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  border: 1px solid #52617a;
  border-radius: var(--radius-sm);
  background: #080d18;
  touch-action: none;
  cursor: crosshair;
}

.canvas-hint {
  position: absolute;
  right: var(--space-3);
  bottom: var(--space-3);
  padding: 6px 10px;
  color: #d9e2f2;
  border-radius: 6px;
  background: rgba(7, 11, 21, 0.78);
  font-size: 0.75rem;
  pointer-events: none;
}

.inspector {
  padding: var(--space-3);
}

.inspector-heading {
  margin-bottom: var(--space-3);
}

.inspector-heading h2 {
  margin: 0;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-1);
  margin: 0;
}

.metrics div {
  min-width: 0;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
}

.metrics dt {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.metrics dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
  font-size: 1.15rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.boss-health,
.config-summary,
.legend {
  margin-top: var(--space-3);
}

.health-label {
  margin-bottom: var(--space-1);
  color: var(--text-muted);
  font-size: 0.86rem;
}

.health-track {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #28364c;
}

.health-bar {
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #ff6578, #ffb15e);
  transition: width 160ms linear;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

th,
td {
  padding: 10px 8px;
  text-align: left;
  border-bottom: 1px solid var(--stroke-soft);
  white-space: nowrap;
}

th {
  color: var(--text-muted);
  font-weight: 700;
}

td {
  font-variant-numeric: tabular-nums;
}

.legend {
  border-top: 1px solid var(--stroke-soft);
}

.legend summary {
  display: flex;
  align-items: center;
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
}

.legend ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.legend li + li {
  margin-top: var(--space-1);
}

footer {
  padding-block: var(--space-4) var(--space-5);
  color: var(--text-muted);
  font-size: 0.86rem;
}

code {
  color: var(--brand);
}

@media (max-width: 1080px) {
  .controls-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .inspector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

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

  .boss-health,
  .config-summary,
  .legend {
    margin-top: 0;
  }
}

@media (max-width: 720px) {
  .app-header,
  main,
  footer {
    width: min(100% - 32px, 1440px);
  }

  .app-header,
  .section-heading,
  .playfield-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .app-header {
    padding-block: var(--space-4) var(--space-3);
  }

  .controls-grid,
  .inspector {
    grid-template-columns: 1fr;
  }

  .version-tabs,
  .button-group {
    width: 100%;
  }

  .version-button,
  .button {
    flex: 1 1 0;
  }

  .playfield-toolbar {
    padding: var(--space-2);
  }

  .tag-list {
    justify-content: flex-start;
  }

  .canvas-wrap {
    padding: var(--space-1);
  }

  .canvas-hint {
    position: static;
    padding: var(--space-1) 0 0;
    background: transparent;
    text-align: center;
  }
}

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