:root, html[data-theme="light"] {
  --bg: #f7f8fb;
  --bg-grad-top: #fafcff;
  --bg-grad-bot: #eef3fb;
  --surface: #ffffff;
  --text: #1a2333;
  --muted: #5a6a83;
  --border: #d2d9e6;
  --focus: #0058cc;
  --enabled: #0d8f4a;
  --radius: 12px;
  --control-bg: #ffffff;
  --track: #e9edf5;
  --track-empty: #cfd8e8;
  --warn: #b54708;
  --danger: #b42318;
  --budget-ok: #0d8f4a;
}

html[data-theme="dark"] {
  --bg: #0d0f17;
  --bg-grad-top: #12151f;
  --bg-grad-bot: #0d0f17;
  --surface: #161925;
  --text: #e8eaf6;
  --muted: #9ca3af;
  --border: #2a2f45;
  --focus: #6c63ff;
  --enabled: #4ade80;
  --control-bg: #12141f;
  --track: #1e2233;
  --track-empty: #2a2f45;
  --warn: #fbbf24;
  --danger: #f87171;
  --budget-ok: #4ade80;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-grad-top) 0%, var(--bg-grad-bot) 100%);
}

html.embed-studio .tool-hub-back,
html.embed-studio .tool-title { display: none !important; }
html.embed-studio .app { padding: 0.65rem 0.85rem 1rem; max-width: none; }

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
}

.controls,
.metrics,
.panes article {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1rem;
}

.controls {
  display: grid;
  gap: 0.6rem;
}

.controls label {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-weight: 600;
}

.controls input:checked + * {
  color: var(--enabled);
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

button {
  border: 1px solid var(--border);
  background: var(--control-bg);
  color: var(--text);
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}

textarea, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem;
  font-family: Consolas, "Courier New", monospace;
  background: var(--control-bg);
  color: var(--text);
  color-scheme: light dark;
}

button:focus-visible,
textarea:focus-visible,
input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.panes {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.input-pane h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.35rem;
}

.preset-row label {
  font-weight: 700;
  font-size: 0.92rem;
}

#presetSel {
  min-width: 14rem;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  background: var(--surface);
}

.preset-hint {
  margin: 0 0 0.85rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.preset-hint code {
  font-size: 0.92em;
}

.blocks {
  display: grid;
  gap: 0.85rem;
}

.block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.block-head label {
  font-weight: 700;
  font-size: 0.95rem;
  margin: 0;
}

.blk-stat {
  font-size: 0.78rem;
  color: var(--muted);
  white-space: nowrap;
}

.breakdown-wrap {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
}

.breakdown-title {
  margin: 0 0 0.5rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.breakdown-bar {
  display: flex;
  gap: 2px;
  min-height: 14px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--track);
}

.break-muted {
  flex: 1;
  padding: 0.35rem 0.6rem;
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
}

.break-seg {
  transition: opacity 0.15s ease;
}

.break-seg:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

.breakdown-legend {
  list-style: none;
  margin: 0.65rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
}

.breakdown-legend li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.breakdown-legend li span:last-child {
  margin-left: auto;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.legend-swatch {
  display: inline-block;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 3px;
  flex-shrink: 0;
}

.legend-swatch--empty {
  background: var(--track-empty);
}

.output-pane h2 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.output-pane textarea {
  min-height: 22rem;
}

.budget-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1rem;
  display: grid;
  gap: 0.55rem;
}

.budget-title {
  margin: 0;
  font-size: 1.05rem;
}

.budget-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

.budget-controls label {
  font-weight: 700;
  font-size: 0.92rem;
}

#budgetModel {
  min-width: 14rem;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  background: var(--surface);
}

.budget-hint {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.budget-bar-track {
  min-height: 16px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--track);
}

.budget-bar-fill {
  height: 100%;
  min-height: 16px;
  width: 0;
  border-radius: 999px;
  background: var(--track-empty);
  transition: width 0.15s ease, background-color 0.15s ease;
}

.budget-bar-fill.budget-ok { background: var(--budget-ok); }
.budget-bar-fill.budget-warn { background: var(--warn); }
.budget-bar-fill.budget-danger { background: var(--danger); }

.budget-summary {
  margin: 0;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}

.budget-warning {
  min-height: 1.2rem;
  margin: 0;
  font-size: 0.85rem;
}

.budget-warning.budget-ok { color: var(--budget-ok); }
.budget-warning.budget-warn { color: var(--warn); }
.budget-warning.budget-danger { color: var(--danger); }

.soft-cta {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.45;
}

.soft-cta a {
  color: var(--focus);
}

html.embed-studio .soft-cta {
  display: none;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.7rem;
}

.metric {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6rem;
  display: grid;
  gap: 0.2rem;
}

.metric span {
  color: var(--muted);
  font-size: 0.92rem;
}

#status {
  min-height: 1.4rem;
  margin: 0;
}

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