:root {
  --bg: #f1efea;
  --surface: #ffffff;
  --surface-2: #f6f5f2;
  --text: #22211f;
  --muted: #858178;
  --line: #e6e3dc;
  --accent: #8d5b3c;
  --accent-hover: #7a4d31;
  --accent-ink: #ffffff;
  --err: #c2413a;
  --err-bg: #fbeceb;
  --grid: #e3e0d9;
  --syn-key: #8d3fbf;
  --syn-type: #1f6fb2;
  --syn-str: #2f7d4a;
  --syn-num: #b55a10;
  --syn-com: #9a958c;
  --radius: 14px;
  --radius-sm: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

:root:not([data-theme="light"]) {
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131315;
    --surface: #1c1c1f;
    --surface-2: #232327;
    --text: #ebe9e4;
    --muted: #8f8b84;
    --line: #2d2d32;
    --accent: #b07a55;
    --accent-hover: #c08a64;
    --accent-ink: #160f0a;
    --err: #f07a72;
    --err-bg: #3a1f1e;
    --grid: #2a2a2e;
    --syn-key: #c99bf0;
    --syn-type: #7db7ec;
    --syn-str: #8fcf9e;
    --syn-num: #f0a86a;
    --syn-com: #6f6b65;
  }
}

:root[data-theme="dark"] {
  --bg: #131315;
  --surface: #1c1c1f;
  --surface-2: #232327;
  --text: #ebe9e4;
  --muted: #8f8b84;
  --line: #2d2d32;
  --accent: #b07a55;
  --accent-hover: #c08a64;
  --accent-ink: #160f0a;
  --err: #f07a72;
  --err-bg: #3a1f1e;
  --grid: #2a2a2e;
  --syn-key: #c99bf0;
  --syn-type: #7db7ec;
  --syn-str: #8fcf9e;
  --syn-num: #f0a86a;
  --syn-com: #6f6b65;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 var(--font);
  -webkit-font-smoothing: antialiased;
}

button, select, input { font: inherit; color: inherit; }
button { cursor: pointer; }
.bar svg, .panel-head svg { width: 18px; height: 18px; flex: none; }
[hidden] { display: none !important; }

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 650;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.brand svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.actions {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.btn, .icon-btn, .select, .seg {
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 14px;
  font-weight: 600;
  white-space: nowrap;
}

.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn.primary:hover { background: var(--accent-hover); }
.btn.primary svg { fill: currentColor; }
.btn.primary .i-stop { display: none; }
.btn.primary.running .i-play { display: none; }
.btn.primary.running .i-stop { display: block; }

.btn.ghost {
  height: 30px;
  padding: 0 10px;
  font-weight: 550;
  font-size: 13px;
  color: var(--muted);
}
.btn.ghost:hover { background: var(--surface-2); color: var(--text); }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 34px;
  padding: 0;
  color: var(--muted);
}
.icon-btn:hover { background: var(--surface); color: var(--text); }
.panel .icon-btn { width: 30px; height: 30px; }
.panel .icon-btn:hover { background: var(--surface-2); }

.btn.ghost svg, .icon-btn svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-btn .i-check { display: none; }
.icon-btn.done .i-copy { display: none; }
.icon-btn.done .i-check { display: block; }

.select {
  max-width: 170px;
  padding: 0 28px 0 12px;
  color: var(--muted);
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%), linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 15px) 15px, calc(100% - 11px) 15px;
  background-size: 4px 4px;
  background-repeat: no-repeat;
  text-overflow: ellipsis;
}
.select:hover { background-color: var(--surface); color: var(--text); }

.seg {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  background: var(--surface);
  border-color: var(--line);
}
.seg button {
  border: 0;
  border-radius: 7px;
  padding: 0 9px;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}
.seg button.active { background: var(--surface-2); color: var(--text); }

.layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 34%);
  gap: 12px;
  padding: 0 12px 12px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

#workspace {
  position: relative;
  min-height: 0;
}

.side {
  display: grid;
  grid-template-rows: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 12px;
  min-height: 0;
}

.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 8px 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}
.panel-head .tools {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.mono { font-family: var(--mono); font-weight: 500; }

.badge {
  border: 0;
  border-radius: 999px;
  padding: 2px 9px;
  background: var(--err-bg);
  color: var(--err);
  font-size: 12px;
  font-weight: 600;
}

.code, .console {
  flex: 1;
  min-height: 0;
  margin: 0;
  overflow: auto;
  padding: 4px 16px 16px;
  font: 12.5px/1.6 var(--mono);
  tab-size: 4;
}

.code code { font: inherit; }
.code .k { color: var(--syn-key); }
.code .t { color: var(--syn-type); }
.code .s { color: var(--syn-str); }
.code .n { color: var(--syn-num); }
.code .c { color: var(--syn-com); font-style: italic; }

.console { cursor: text; }
#term {
  margin: 0;
  font: inherit;
  white-space: pre-wrap;
  word-break: break-word;
}
#term .sys { color: var(--muted); }
#term .err { color: var(--err); }
#term .problem {
  display: block;
  width: 100%;
  margin: 4px 0;
  padding: 6px 10px;
  border: 0;
  border-radius: 8px;
  background: var(--err-bg);
  color: var(--err);
  font: inherit;
  text-align: left;
  white-space: normal;
}

#ask { display: flex; }
#answer {
  flex: 1;
  min-width: 0;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font: inherit;
  caret-color: var(--accent);
}
#answer::placeholder { color: var(--muted); opacity: 0.6; }

/* Blockly */
.blocklyToolboxDiv {
  padding: 10px 8px;
  background: var(--surface) !important;
  border-right: 1px solid var(--line);
}
.blocklyTreeRow {
  height: 34px;
  line-height: 34px;
  margin: 2px 0;
  padding-right: 12px !important;
  border-radius: 9px;
  border-left-width: 4px !important;
}
.blocklyTreeRow:not(.blocklyTreeSelected):hover { background: var(--surface-2) !important; }
.blocklyTreeLabel {
  font: 550 13px var(--font);
  color: var(--text);
}
.blocklyTreeSelected .blocklyTreeLabel { color: #fff; }
.blocklyTreeIcon { display: none !important; }
pattern[id^="blocklyGridPattern"] line { stroke: var(--grid); }
.blocklyFlyoutButtonBackground { stroke: none; fill: var(--accent); }
.blocklyFlyoutButton .blocklyText { fill: var(--accent-ink); font-weight: 600; }
.blocklyFlyoutButtonShadow { display: none; }
.blocklyMainBackground { stroke: none; }
.blocklyWidgetDiv .blocklyMenu, .blocklyDropDownDiv { border-radius: 10px; }

@media (max-width: 860px) {
  body { height: auto; min-height: 100%; }
  .bar { padding: 10px 16px; }
  .select { max-width: 130px; }
  .layout {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 64vh auto;
    padding: 0 16px 16px;
  }
  .side { grid-template-rows: auto auto; }
  .code { max-height: 340px; }
  .console { min-height: 200px; max-height: 300px; }
}

@media (max-width: 560px) {
  .brand span, #run span { display: none; }
  .actions { gap: 2px; }
  .select { max-width: 96px; padding-left: 8px; }
  .btn.primary { padding: 0 11px; }
  .seg button { padding: 0 7px; }
}