/* ---- Tokens ------------------------------------------------------------ */
:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #ffffff;
  --chart-surface: #fcfcfb;
  --text: #0b0b0b;
  --text-2: #52514e;
  --muted: #7a7873;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.12);
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --accent-wash: rgba(42, 120, 214, 0.1);

  --status-good: #0ca30c;
  --status-warning: #fab219;
  --status-serious: #ec835a;
  --status-critical: #d03b3b;
  --good-ink: #006300;
  --warning-ink: #8a5a00;
  --critical-ink: #b42323;

  /* Chart series (validated categorical palette, stack order). */
  --series-nuclear: #e87ba4;
  --series-coal: #4a3aa7;
  --series-gas: #eb6834;
  --series-hydro: #2a78d6;
  --series-wind: #1baf7a;
  --series-solar: #eda100;
  --series-storage: #9856a7;
  --series-other: #e34948;

  --radius: 12px;
  --radius-s: 8px;
  --gap: 16px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --chart-surface: #1a1a19;
    --text: #ffffff;
    --text-2: #c3c2b7;
    --muted: #9a988f;
    --grid: #2c2c2a;
    --axis: #45453f;
    --border: rgba(255, 255, 255, 0.12);
    --accent: #3987e5;
    --accent-wash: rgba(57, 135, 229, 0.16);
    --good-ink: #3ccf3c;
    --warning-ink: #fab219;
    --critical-ink: #ff7a7a;
    --series-nuclear: #d55181;
    --series-coal: #9085e9;
    --series-gas: #d95926;
    --series-hydro: #3987e5;
    --series-wind: #199e70;
    --series-solar: #c98500;
    --series-storage: #a32ebb;
    --series-other: #e66767;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --chart-surface: #1a1a19;
  --text: #ffffff;
  --text-2: #c3c2b7;
  --muted: #9a988f;
  --grid: #2c2c2a;
  --axis: #45453f;
  --border: rgba(255, 255, 255, 0.12);
  --accent: #3987e5;
  --accent-wash: rgba(57, 135, 229, 0.16);
  --good-ink: #3ccf3c;
  --warning-ink: #fab219;
  --critical-ink: #ff7a7a;
  --series-nuclear: #d55181;
  --series-coal: #9085e9;
  --series-gas: #d95926;
  --series-hydro: #3987e5;
  --series-wind: #199e70;
  --series-solar: #c98500;
  --series-storage: #a32ebb;
  --series-other: #e66767;
}

/* ---- Base ---------------------------------------------------------------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  background: var(--page);
  color: var(--text);
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 12px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); }
h2 { font-size: 1.1rem; }
h3 { font-size: 0.95rem; }
p { margin: 0 0 12px; }
[hidden] { display: none !important; }

.skip-link { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 50; }
.skip-link:focus { left: 8px; }

button {
  min-height: 44px;
  min-width: 44px;
  padding: 0 16px;
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.link { background: none; border: none; color: var(--text-2); text-decoration: underline; }
button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--gap);
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; margin-top: var(--gap); }
.hint { color: var(--text-2); font-size: 0.85rem; margin: 0; }

/* ---- Header and steps ------------------------------------------------------ */
.app-header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.brand-mark {
  width: 22px; height: 22px; border-radius: 6px; background: var(--accent);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 32 32'%3E%3Crect width='32' height='32' rx='7'/%3E%3C/svg%3E");
}
.version { margin-left: auto; font-size: 0.75rem; color: var(--muted); text-decoration: none; white-space: nowrap; font-variant-numeric: tabular-nums; }
.version:hover { color: var(--accent); text-decoration: underline; }
.version span + span::before { content: " · "; }
.lang-btn { min-height: 36px; padding: 0 12px; font-weight: 500; }
.steps ol { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.steps li { display: flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; color: var(--muted); font-size: 0.9rem; }
.steps li[aria-current="step"] { color: var(--text); background: var(--accent-wash); font-weight: 600; }
.step-n {
  display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%;
  font-size: 0.75rem; border: 1px solid currentColor;
}
.steps li[aria-current="step"] .step-n { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

main { max-width: 1280px; margin: 0 auto; padding: var(--gap); }
.screen-message { padding: 48px 0; text-align: center; }
.screen-message pre { text-align: left; white-space: pre-wrap; background: var(--surface); border: 1px solid var(--border); padding: 12px; border-radius: var(--radius-s); }

/* ---- Step 1: intro ---------------------------------------------------------- */
.intro { max-width: 880px; margin: 0 auto; }
.intro-hero { padding: 24px 0 8px; }
.eyebrow { color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.8rem; margin-bottom: 6px; }
.lead { font-size: 1.15rem; }
.intro-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--gap); margin-top: 8px; }
.goal-list { margin: 0; padding-left: 1.2em; display: grid; gap: 8px; }
.card-accent { background: var(--accent-wash); }
.mini-gauge { display: grid; grid-template-columns: 10fr 3fr 4fr 3fr 10fr; height: 12px; border-radius: 6px; overflow: hidden; margin-top: 12px; }
.mini-gauge .z-ok { background: var(--status-good); }
.mini-gauge .z-warn { background: var(--status-warning); }
.mini-gauge .z-crit { background: var(--status-critical); }
.mini-gauge-labels { display: flex; justify-content: space-between; color: var(--text-2); font-size: 0.8rem; margin-top: 4px; }

/* ---- Step 2: setup ------------------------------------------------------------ */
.setup-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: var(--gap); align-items: start; }
.setup-options { display: grid; gap: var(--gap); }
fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: var(--gap); margin: 0; background: var(--surface); min-width: 0; }
legend { font-weight: 700; padding: 0 6px; }
.choice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 10px; }
.choice-grid-3 { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.choice-grid-4 { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.sub-legend { margin: 16px 0 8px; font-size: 0.95rem; }
.choice {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  text-align: left; padding: 12px; min-height: 64px; height: 100%;
  font-weight: 400;
}
.choice strong { font-size: 1rem; }
.choice small { color: var(--text-2); line-height: 1.35; }
.choice .badge { margin-top: auto; }
.choice .facts { color: var(--text); font-weight: 600; font-size: 0.8rem; margin: 4px 0 6px; }
.choice[aria-checked="true"] { border: 2px solid var(--accent); background: var(--accent-wash); color: var(--text); padding: 11px; }
.badge { display: inline-block; font-size: 0.72rem; font-weight: 600; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--text-2); }
.toggle { display: flex; gap: 12px; align-items: flex-start; margin-top: 14px; cursor: pointer; }
.toggle-all { padding-bottom: 10px; border-bottom: 1px solid var(--grid); }
.toggle input { width: 22px; height: 22px; margin-top: 2px; accent-color: var(--accent); flex: none; }
.toggle small { display: block; color: var(--text-2); }
.custom-base { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--text-2); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button { min-height: 36px; padding: 0 12px; font-weight: 500; }
.sliders { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px 20px; }
.slider { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 2px 8px; }
.slider label { display: flex; align-items: center; gap: 6px; font-size: 0.9rem; }
.slider output { font-variant-numeric: tabular-nums; font-weight: 600; }
.slider input { grid-column: 1 / -1; width: 100%; height: 32px; accent-color: var(--accent); }
.setup-summary { position: sticky; top: 12px; }
.summary-rows { display: grid; gap: 6px; margin: 0 0 12px; }
.summary-rows div { display: flex; justify-content: space-between; gap: 12px; }
.summary-rows dt { color: var(--text-2); }
.summary-rows dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.summary-rows .sub { font-size: 0.85rem; margin-top: -2px; }
.summary-rows .sub dt { display: flex; align-items: center; gap: 6px; padding-left: 12px; }
.summary-rows .sub dd { font-weight: 500; color: var(--text-2); }
.meter { position: relative; height: 14px; border-radius: 7px; background: var(--grid); overflow: hidden; margin: 18px 0 4px; }
.meter span { position: absolute; top: 0; bottom: 0; }
.meter .m-firm { left: 0; background: var(--series-hydro); }
.meter .m-flex { background: var(--series-storage); border-left: 2px solid var(--surface); }
.meter-peak { position: relative; height: 0; }
.meter-peak i { position: absolute; top: -26px; width: 2px; height: 22px; background: var(--text); }
.meter-legend { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 0.8rem; color: var(--text-2); }
.meter-legend span { display: inline-flex; align-items: center; gap: 6px; }
.warning-text { color: var(--critical-ink); font-weight: 600; font-size: 0.9rem; margin-top: 8px; }
.system-cost { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--grid); }
.system-cost h3 { margin: 0 0 4px; }
.cost-total { font-size: 1.35rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.cost-central { font-size: 0.85rem; color: var(--text-2); font-variant-numeric: tabular-nums; }
.cost-source { font-size: 0.8rem; margin: 6px 0 0; }
.cost-source a { color: var(--accent); }
.cost-note { font-size: 0.8rem; color: var(--text-2); margin: 4px 0 8px; }
.cost-rate { margin-bottom: 6px; }
.cost-details summary { cursor: pointer; font-weight: 600; font-size: 0.85rem; min-height: 32px; }
.cost-table { width: 100%; border-collapse: collapse; font-size: 0.78rem; font-variant-numeric: tabular-nums; }
.cost-table th { text-align: left; color: var(--text-2); font-weight: 600; padding: 4px 4px 4px 0; border-bottom: 1px solid var(--grid); }
.cost-table td { padding: 4px 4px 4px 0; border-bottom: 1px solid var(--grid); white-space: nowrap; }
.cost-table th:not(:first-child), .cost-table td:not(:first-child) { text-align: right; }
.cost-table td:first-child { white-space: normal; }
.data-notes { margin-top: 12px; font-size: 0.85rem; color: var(--text-2); }
.data-notes summary { cursor: pointer; font-weight: 600; color: var(--text); min-height: 32px; }
.data-notes a { color: var(--accent); overflow-wrap: anywhere; }
.data-notes ul { padding-left: 1.2em; margin: 6px 0; }

/* ---- Step 3: play --------------------------------------------------------------- */
.play-bar {
  position: sticky; top: 0; z-index: 10;
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 12px 20px;
  padding: 10px 14px; margin: calc(-1 * var(--gap)) calc(-1 * var(--gap)) var(--gap);
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.clock { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1; }
.day-label { color: var(--text-2); font-size: 0.85rem; }
.freq-block { display: grid; gap: 6px; max-width: 560px; width: 100%; justify-self: center; }
.freq-top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 12px; }
.freq-value { font-size: 2rem; font-weight: 700; line-height: 1; }
.freq-value small { font-size: 1rem; color: var(--text-2); font-weight: 600; }
.freq-imbalance { font-size: 0.85rem; font-weight: 600; color: var(--text-2); font-variant-numeric: tabular-nums; white-space: nowrap; margin-right: auto; margin-left: 12px; }
.freq-band { font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.85rem; padding: 2px 10px; border-radius: 999px; }
.freq-block[data-band="normal"] .freq-band { color: var(--good-ink); background: color-mix(in srgb, var(--status-good) 14%, transparent); }
.freq-block[data-band="warning"] .freq-band { color: var(--warning-ink); background: color-mix(in srgb, var(--status-warning) 22%, transparent); }
.freq-block[data-band="critical"] .freq-band,
.freq-block[data-band="blackout"] .freq-band { color: var(--critical-ink); background: color-mix(in srgb, var(--status-critical) 16%, transparent); }
/* Customers cut off: show the label as critical even if frequency has recovered. */
.freq-block[data-shed="true"] .freq-band { color: var(--critical-ink); background: color-mix(in srgb, var(--status-critical) 16%, transparent); }
.freq-band::before { content: "●"; margin-right: 6px; }
.freq-block[data-band="warning"] .freq-band::before { content: "▲"; }
.freq-block[data-band="critical"] .freq-band::before,
.freq-block[data-band="blackout"] .freq-band::before,
.freq-block[data-shed="true"] .freq-band::before { content: "■"; }
.gauge { position: relative; height: 12px; }
.gauge-zones { position: absolute; inset: 0; border-radius: 6px; overflow: hidden; display: flex; }
.gauge-zones span { height: 100%; }
.gauge-zones .z-ok { background: var(--status-good); }
.gauge-zones .z-warn { background: var(--status-warning); }
.gauge-zones .z-crit { background: var(--status-critical); }
.gauge-zones .z-out { background: var(--muted); }
.gauge-needle {
  position: absolute; top: -4px; bottom: -4px; width: 4px; margin-left: -2px;
  background: var(--text); border-radius: 2px; box-shadow: 0 0 0 2px var(--surface);
  transition: left 0.15s linear;
}
.controls { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
/* Compact chart in the sticky bar, shown only when the full chart is out of view. */
/* It floats just below the bar, so showing it never shifts the page. */
.mini-chart-wrap {
  display: none; position: absolute; top: calc(100% + 6px); left: 12px; right: 12px;
  max-width: 1256px; margin: 0 auto; padding: 0; min-height: 0;
  border: 1px solid var(--border); border-radius: var(--radius-s); background: var(--chart-surface);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.14); cursor: pointer; overflow: hidden;
}
.play-bar.show-mini .mini-chart-wrap { display: block; }
.mini-chart { display: block; width: 100%; height: 96px; }
.speeds { display: flex; gap: 4px; }
.speeds button { padding: 0 10px; }
.icon-btn { padding: 0; width: 44px; font-size: 1.1rem; }

.toast {
  margin: 0 0 var(--gap); padding: 12px 16px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); border-left: 6px solid var(--status-serious);
  font-weight: 600;
}
.toast small { display: block; font-weight: 400; color: var(--text-2); margin-top: 4px; }

.play-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: var(--gap); align-items: start; }
.chart-card { padding: 12px 12px 8px; }
.chart-head { display: flex; justify-content: space-between; align-items: baseline; }
.chart-head h2 { margin: 0 0 6px 4px; }
.chart-wrap { position: relative; }
#chart { display: block; width: 100%; height: clamp(220px, 38vh, 380px); border-radius: var(--radius-s); }
.freq-chart { display: block; width: 100%; height: 72px; margin-top: 6px; border-radius: var(--radius-s); }
.chart-tooltip {
  position: absolute; z-index: 5; pointer-events: none; min-width: 180px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-s);
  padding: 8px 10px; font-size: 0.85rem; box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.tt-head { font-weight: 700; margin-bottom: 4px; }
.tt-row { display: grid; grid-template-columns: 14px auto 1fr; align-items: center; gap: 6px; }
.tt-row strong { font-variant-numeric: tabular-nums; }
.tt-row span:last-child { color: var(--text-2); }
.tt-row:not(:has(.key)) { grid-template-columns: 14px auto 1fr; }
.tt-row:not(:has(.key))::before { content: ""; }

.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; list-style: none; margin: 8px 4px 0; padding: 0; font-size: 0.8rem; color: var(--text-2); }
.legend li { display: inline-flex; align-items: center; gap: 6px; }
.key { display: inline-block; flex: none; }
.key-area { width: 12px; height: 12px; border-radius: 3px; background: var(--key); }
.key-wash { width: 12px; height: 12px; border-radius: 3px; background: color-mix(in srgb, var(--key) 35%, transparent); }
.key-line { width: 14px; height: 2px; background: var(--key); border-radius: 1px; }
.key-dash { width: 14px; height: 0; border-top: 2px dashed var(--key); }
.key-dot { width: 14px; height: 0; border-top: 2px dotted var(--key); }

.side h3 { margin: 16px 0 8px; }
.fuel-meters { display: grid; gap: 12px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--grid); }
.fuel-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.fuel-head span { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-2); font-weight: 600; }
.fuel-head strong { font-size: 1.1rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.hbar { display: flex; height: 12px; margin-top: 4px; border-radius: 6px; background: var(--grid); overflow: hidden; }
.hbar-seg { height: 100%; transition: width 0.3s linear; }
.hbar-seg + .hbar-seg { box-shadow: -2px 0 0 var(--surface); }
.hbar-scale { display: flex; justify-content: space-between; font-size: 0.7rem; color: var(--muted); margin-top: 2px; }
.fuel-meter small { display: block; color: var(--text-2); font-size: 0.8rem; margin-top: 2px; }
.fuel-rows summary { cursor: pointer; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-2); font-weight: 600; min-height: 32px; display: flex; align-items: center; }
.fuel-rows-head { display: flex; justify-content: space-between; gap: 8px; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); font-weight: 600; margin-bottom: 4px; }
.fuel-legend { display: grid; gap: 3px; list-style: none; margin: 0; padding: 0; font-size: 0.82rem; }
.fuel-legend li { display: grid; grid-template-columns: 12px minmax(0, 1fr) auto 3.2em; align-items: center; gap: 6px; }
.fuel-legend .swatch { width: 12px; height: 12px; border-radius: 3px; }
.fuel-name { color: var(--text-2); overflow-wrap: anywhere; }
.fuel-cost { font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; text-align: right; }
.fuel-share { color: var(--text-2); font-variant-numeric: tabular-nums; text-align: right; }
.fuel-legend li.idle .fuel-cost { color: var(--muted); font-weight: 400; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 0; }
.stats > div { min-width: 0; }
.stats .wide { grid-column: 1 / -1; }
.stats dt { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-2); font-weight: 600; }
.stats dd { margin: 0; font-size: 1.15rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.stats small { color: var(--text-2); font-size: 0.8rem; }
.stats .shed dd { color: var(--critical-ink); }
.imb-surplus, .imb-shortfall { font-size: 0.85rem; color: var(--text-2); font-weight: 500; margin-left: 4px; }
.low-inertia dd { color: var(--warning-ink); }
.log { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-height: 260px; overflow-y: auto; font-size: 0.85rem; }
.log li { display: grid; grid-template-columns: 44px 1fr; gap: 6px; }
.log time { color: var(--muted); font-variant-numeric: tabular-nums; }
.log .log-note { grid-column: 2; color: var(--text-2); font-size: 0.8rem; }
.log .empty { display: block; color: var(--muted); }
.log-toggle { min-height: 36px; padding: 0; margin-top: 6px; font-size: 0.85rem; font-weight: 600; }

.units-section { margin-top: var(--gap); }
.units-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 16px; margin-bottom: 10px; }
.units-head h2 { margin: 0; }
.units { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.unit {
  display: grid; gap: 6px; padding: 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
}
.unit.selected { border: 2px solid var(--accent); padding: 11px; }
.unit[data-status="offline"] { background: color-mix(in srgb, var(--surface) 70%, var(--page)); }
.unit-head { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 8px; min-width: 0; }
.swatch { width: 12px; height: 12px; border-radius: 3px; flex: none; background: var(--key); }
.unit-name { font-weight: 700; min-width: 0; }
.unit-key { color: var(--muted); font-size: 0.75rem; font-weight: 600; }
.status { margin-left: auto; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--text-2); white-space: nowrap; }
.status[data-status="online"] { color: var(--good-ink); border-color: color-mix(in srgb, var(--status-good) 45%, transparent); }
.status[data-status="starting"], .status[data-status="stopping"], .status[data-status="warming"] { color: var(--warning-ink); border-color: color-mix(in srgb, var(--status-warning) 60%, transparent); }
.status[data-status="standby"] { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.unit-type { color: var(--text-2); font-size: 0.8rem; margin-top: -4px; }
.unit-output { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 8px; }
.unit-output strong { font-size: 1.25rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.unit-output span { color: var(--text-2); font-size: 0.8rem; text-align: right; font-variant-numeric: tabular-nums; }
.bar { position: relative; height: 10px; background: var(--grid); border-radius: 5px; }
.bar-online { position: absolute; top: 0; bottom: 0; left: 0; background: color-mix(in srgb, var(--key) 22%, transparent); border-radius: 5px; }
.bar-fill { position: absolute; top: 0; bottom: 0; left: 0; background: var(--key); border-radius: 5px; }
.bar-fill.charging { background: repeating-linear-gradient(135deg, var(--key) 0 4px, color-mix(in srgb, var(--key) 45%, var(--surface)) 4px 7px); }
.bar-min { position: absolute; top: -2px; bottom: -2px; width: 2px; background: var(--muted); }
.bar-target { position: absolute; top: -4px; bottom: -4px; width: 4px; margin-left: -2px; background: var(--text); border-radius: 2px; box-shadow: 0 0 0 2px var(--surface); }
.unit-detail { font-size: 0.8rem; color: var(--text-2); min-height: 1.2em; font-variant-numeric: tabular-nums; }
.unit-buttons { display: grid; grid-template-columns: 1fr 1fr 1.3fr; gap: 6px; }
.unit-buttons .adj { font-size: 1.4rem; line-height: 1; padding: 0; }
.unit-buttons .power { font-size: 0.9rem; }
.unit-buttons .auto-btn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.counts { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 6px; }
.count {
  display: grid; grid-template-columns: 1fr 1fr; grid-template-areas: "label label" "pending pending" "minus plus";
  gap: 4px; align-items: center; padding: 6px; border: 1px solid var(--border); border-radius: var(--radius-s);
}
.count-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-2); font-weight: 600; }
.count-value { font-size: 1.1rem; font-variant-numeric: tabular-nums; }
.count .adj { min-height: 40px; font-size: 1.2rem; }
.count-head { grid-area: label; display: flex; justify-content: space-between; align-items: baseline; gap: 6px; }
.count-pending { grid-area: pending; font-size: 0.72rem; color: var(--warning-ink); min-height: 1em; margin-top: -2px; }
.flash { animation: flash 0.6s ease-out; border-radius: 4px; }
@keyframes flash { from { background: color-mix(in srgb, var(--accent) 30%, transparent); } to { background: transparent; } }
.count .adj:first-of-type { grid-area: minus; }
.count .adj:last-of-type { grid-area: plus; }

/* ---- Leaderboard --------------------------------------------------------------- */
.lb { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--grid); }
.lb h3 { margin: 0 0 4px; }
.lb-note { font-size: 0.85rem; color: var(--text-2); margin: 0 0 8px; }
.lb-form label { font-size: 0.85rem; font-weight: 600; }
.lb-row { display: flex; gap: 8px; margin: 4px 0; }
.lb-row input { flex: 1; min-width: 0; min-height: 44px; padding: 0 10px; font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-s); }
.lb-form small { display: block; font-size: 0.75rem; color: var(--muted); }
.lb-status { font-size: 0.85rem; margin: 6px 0; min-height: 1em; }
.lb-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; font-size: 0.9rem; }
.lb-list li { display: grid; grid-template-columns: 2em minmax(0, 1fr) auto 5.5em; align-items: baseline; gap: 8px; padding: 3px 4px; border-radius: 4px; }
.lb-list li.lb-you { background: var(--accent-wash); font-weight: 600; }
.lb-list li.lb-empty { display: block; color: var(--muted); }
.lb-rank { color: var(--muted); font-variant-numeric: tabular-nums; }
.lb-name { display: flex; align-items: baseline; gap: 6px; min-width: 0; }
.lb-name > span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-tag { flex: none; font-size: 0.7rem; font-weight: 400; color: var(--muted); border: 1px solid var(--border); border-radius: 999px; padding: 0 6px; }
.lb-points { font-variant-numeric: tabular-nums; text-align: right; }
.lb-state { font-size: 0.75rem; }
.lb-kpis { grid-column: 2 / -1; margin-top: -2px; font-size: 0.75rem; font-weight: 400; color: var(--text-2); font-variant-numeric: tabular-nums; }
.lb-list .lb-verified { color: var(--good-ink); }
.lb-list .lb-pending { color: var(--warning-ink); }

/* ---- Footer ------------------------------------------------------------------ */
.app-footer {
  max-width: 1280px; margin: 24px auto 0; padding: 16px 16px 28px;
  border-top: 1px solid var(--border); color: var(--text-2); font-size: 0.85rem;
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 20px;
}
.app-footer p { margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 16px; list-style: none; margin: 0; padding: 0; }
.footer-links a { color: var(--accent); text-decoration: none; display: inline-block; min-height: 32px; line-height: 32px; }
.footer-links a:hover { text-decoration: underline; }
.footer-license { flex-basis: 100%; color: var(--muted); font-size: 0.78rem; }

/* ---- Overlays ------------------------------------------------------------------ */
.overlay { position: fixed; inset: 0; z-index: 40; display: grid; place-items: center; padding: 16px; background: rgba(0, 0, 0, 0.55); overflow-y: auto; }
.dialog { width: min(560px, 100%); background: var(--surface); border-radius: var(--radius); padding: 24px; border: 1px solid var(--border); }
.end h2 { font-size: 1.6rem; margin-bottom: 4px; }
.end-sub { color: var(--text-2); }
.end-score { display: flex; align-items: center; gap: 16px; margin: 12px 0; }
.stars { font-size: 1.8rem; letter-spacing: 4px; color: var(--status-warning); }
.stars .off { color: var(--grid); }
.points { font-size: 1.4rem; font-weight: 700; }
.kpis { list-style: none; margin: 0 0 14px; padding: 0; display: grid; gap: 10px; }
.kpi-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.kpi-label { font-weight: 600; }
.kpi-value { font-size: 1.15rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.kpi-bar { height: 8px; margin: 4px 0 2px; border-radius: 4px; background: var(--grid); overflow: hidden; }
.kpi-bar span { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.kpi-foot { display: flex; justify-content: space-between; gap: 8px; font-size: 0.8rem; color: var(--text-2); }
.kpi-score { white-space: nowrap; font-variant-numeric: tabular-nums; }
.end-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; margin: 0 0 12px; }
.end-metrics div { display: flex; justify-content: space-between; gap: 8px; border-bottom: 1px solid var(--grid); padding-bottom: 4px; }
.end-metrics dt { color: var(--text-2); font-size: 0.9rem; }
.end-metrics dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; text-align: right; }
.lesson { background: var(--accent-wash); border-radius: var(--radius-s); padding: 12px 14px; }
.lesson h3 { margin-bottom: 4px; }
.lesson p { margin: 0; }

.coach { position: fixed; inset: 0; z-index: 30; pointer-events: none; }
.coach-card {
  pointer-events: auto; position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%);
  width: min(460px, calc(100% - 32px)); background: var(--surface); border: 2px solid var(--accent);
  border-radius: var(--radius); padding: 16px; box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}
.coach-step { color: var(--accent); font-weight: 700; font-size: 0.8rem; text-transform: uppercase; margin-bottom: 4px; }
.coach .actions { margin-top: 8px; justify-content: space-between; }
.coach-target { position: relative; z-index: 31; outline: 3px solid var(--accent) !important; outline-offset: 4px; border-radius: var(--radius); }

/* ---- Responsive ------------------------------------------------------------- */
@media (max-width: 1000px) {
  .play-grid { grid-template-columns: 1fr; }
  .side .stats { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .setup-grid { grid-template-columns: 1fr; }
  .setup-summary { position: static; }
}

@media (max-width: 640px) {
  :root { --gap: 12px; }
  main { padding: var(--gap); }
  .app-header { padding: 8px 12px; }
  .steps { order: 3; flex-basis: 100%; }
  .version { display: grid; text-align: right; line-height: 1.25; font-size: 0.7rem; }
  .version span + span::before { content: none; }
  .lang-btn { min-height: 36px; padding: 0 10px; font-size: 0.9rem; }
  .steps li { padding: 2px 8px; font-size: 0.8rem; }
  .play-bar { grid-template-columns: auto minmax(0, 1fr); padding: 8px 12px; gap: 6px 14px; }
  .controls { grid-column: 1 / -1; justify-content: space-between; flex-wrap: nowrap; }
  .speeds button { padding: 0 8px; min-width: 40px; }
  .icon-btn { width: 40px; min-width: 40px; }
  .clock { font-size: 1.3rem; }
  .day-label { max-width: 34vw; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 0.75rem; }
  .freq-value { font-size: 1.5rem; }
  .freq-band { font-size: 0.72rem; padding: 1px 8px; }
  .mini-chart { height: 76px; }
  .freq-imbalance { order: 3; flex-basis: 100%; margin: 0; font-size: 0.8rem; }
  #chart { height: 220px; }
  .units { grid-template-columns: 1fr; }
  .end-metrics { grid-template-columns: 1fr; }
  .dialog { padding: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

@media (forced-colors: active) {
  .gauge-needle, .bar-target { background: CanvasText; }
  .bar-fill { background: Highlight; }
}