/* Ride-Hailing Simulator (MVP)
   - No build step, no dependencies.
   - Works on file:// and GitHub Pages.
*/

:root {
  --bg: #0b1220;
  --panel: #0f172a;
  --panel2: #0b1324;
  --text: #e5e7eb;
  --muted: rgba(229, 231, 235, 0.7);
  --border: rgba(148, 163, 184, 0.18);
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.26);

  --accent: #60a5fa;
  --accent2: #34d399;
  --warn: #fbbf24;
  --danger: #fb7185;

  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  background: radial-gradient(1200px 700px at 20% 0%, rgba(96,165,250,0.12), transparent 60%),
              radial-gradient(900px 600px at 80% 10%, rgba(52,211,153,0.10), transparent 65%),
              var(--bg);
  color: var(--text);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 15, 30, 0.78);
  backdrop-filter: blur(10px);
}

.brand__title {
  font-size: 16px;
  font-weight: 750;
  letter-spacing: 0.2px;
}
.brand__subtitle {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.topbar__right {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.seed {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.6);
}
.seed__label {
  font-size: 12px;
  color: var(--muted);
}
.seed__input {
  width: 120px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(3, 7, 18, 0.6);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  outline: none;
}
.seed__input:focus { border-color: rgba(96, 165, 250, 0.7); }

.topbar__buttons {
  display: flex;
  gap: 10px;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  padding: 9px 12px;
  border-radius: 12px;
  font-weight: 650;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  background: rgba(15, 23, 42, 0.8);
  transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease;
  user-select: none;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: linear-gradient(180deg, rgba(96,165,250,0.95), rgba(59,130,246,0.85));
  border-color: rgba(96,165,250,0.6);
  color: #071122;
}
.btn--primary:hover { filter: brightness(1.02); }
.btn--outline {
  background: rgba(15, 23, 42, 0.6);
  border-color: rgba(148, 163, 184, 0.22);
}
.btn--outline:hover { border-color: rgba(96,165,250,0.5); }
.btn--ghost {
  background: rgba(3, 7, 18, 0.25);
  border-color: rgba(148, 163, 184, 0.18);
  font-weight: 600;
}
.btn--ghost:hover { border-color: rgba(148, 163, 184, 0.32); }

.page {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr) 360px;
  gap: 14px;
  padding: 14px;
  align-items: start;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.62);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.panel__header {
  padding: 14px 14px 10px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(2, 6, 23, 0.2);
}
.panel__title {
  font-weight: 750;
  font-size: 13px;
  letter-spacing: 0.2px;
}
.panel__hint {
  margin-top: 3px;
  font-size: 12px;
  color: var(--muted);
}

.panel--left, .panel--right {
  position: sticky;
  top: 76px;
  max-height: calc(100vh - 90px);
  overflow: auto;
}

.control-group { padding: 12px 14px; }
.control-group + .control-group { border-top: 1px solid rgba(148, 163, 184, 0.12); }
.control-group__title {
  font-size: 12px;
  font-weight: 750;
  color: rgba(229, 231, 235, 0.9);
  margin-bottom: 10px;
  letter-spacing: 0.2px;
}

.field { margin-bottom: 12px; }
.field:last-child { margin-bottom: 0; }
.field__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
}
.field__label {
  font-size: 12px;
  color: rgba(229, 231, 235, 0.9);
}
.field__value {
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(229, 231, 235, 0.85);
  font-variant-numeric: tabular-nums;
}
.field__hint {
  margin-top: 5px;
  font-size: 11px;
  color: rgba(229, 231, 235, 0.6);
}

input[type="range"] {
  width: 100%;
  accent-color: rgba(96,165,250,0.95);
}
select {
  width: 100%;
  padding: 9px 10px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(3, 7, 18, 0.35);
  color: var(--text);
  font-size: 13px;
  outline: none;
}
select:focus { border-color: rgba(96, 165, 250, 0.6); }

.toggle-row {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(3, 7, 18, 0.18);
}
.toggle-row__label { font-size: 12px; color: rgba(229,231,235,0.9); }
.toggle-row input { transform: translateY(1px); }

.radio {
  display: grid;
  gap: 8px;
}
.radio__item {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(3, 7, 18, 0.18);
}
.radio__item span { font-size: 12px; color: rgba(229,231,235,0.9); }

.center { min-width: 0; display: grid; gap: 14px; }

.city-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.62);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.city-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(2, 6, 23, 0.2);
}
.city-card__title {
  font-weight: 750;
  font-size: 13px;
  letter-spacing: 0.2px;
}
.city-card__badges { display: flex; gap: 8px; align-items: center; }

.city-card__summary {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  background: rgba(2, 6, 23, 0.10);
}

.top-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(3, 7, 18, 0.18);
  color: rgba(229,231,235,0.82);
  font-size: 12px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.pill b {
  font-weight: 800;
  color: rgba(229,231,235,0.92);
}
.pill--limiter {
  border-color: rgba(251,191,36,0.28);
  background: rgba(251,191,36,0.06);
}

.badge {
  font-size: 11px;
  font-weight: 750;
  padding: 6px 9px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(3, 7, 18, 0.25);
  color: rgba(229,231,235,0.9);
}
.badge--ok { border-color: rgba(52,211,153,0.35); background: rgba(52,211,153,0.10); }
.badge--warn { border-color: rgba(251,191,36,0.45); background: rgba(251,191,36,0.12); color: rgba(255,237,213,0.95); }
.badge--danger { border-color: rgba(251,113,133,0.55); background: rgba(251,113,133,0.12); }
.is-hidden { display: none !important; }

.city-card__canvasWrap {
  height: min(72vh, 760px);
  background: linear-gradient(180deg, rgba(2, 6, 23, 0.22), rgba(2, 6, 23, 0.08));
}
.city-card__canvasWrap canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

.city-card__footer {
  padding: 10px 14px;
  border-top: 1px solid rgba(148, 163, 184, 0.12);
  background: rgba(2, 6, 23, 0.16);
}
.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
}
.footer-kv {
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.kv__k { font-size: 11px; color: rgba(229,231,235,0.65); }
.kv__v {
  font-size: 12px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: rgba(229,231,235,0.9);
}

.metrics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 12px 14px;
}
.metric {
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(3, 7, 18, 0.20);
}
.metric__k {
  font-size: 11px;
  color: rgba(229,231,235,0.65);
  margin-bottom: 6px;
}
.metric__v {
  font-size: 16px;
  font-weight: 800;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.charts {
  padding: 0 14px 14px;
  display: grid;
  gap: 10px;
}
.chart-card {
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(3, 7, 18, 0.20);
  border-radius: 14px;
  overflow: hidden;
}
.chart-card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  padding: 10px 10px 6px;
}
.chart-card__title {
  font-size: 12px;
  font-weight: 750;
  color: rgba(229,231,235,0.85);
}
.chart-card__now {
  font-size: 12px;
  font-family: var(--mono);
  color: rgba(229,231,235,0.70);
  font-variant-numeric: tabular-nums;
}
.chart-card__canvasWrap {
  height: 92px;
  padding: 6px 8px 10px;
}
.chart-card__canvasWrap canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

.howto {
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.50);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.howto__summary {
  padding: 12px 14px;
  cursor: pointer;
  font-weight: 750;
  font-size: 13px;
  background: rgba(2, 6, 23, 0.14);
}
.howto__body { padding: 10px 14px 14px; }
.howto__list {
  margin: 0;
  padding-left: 18px;
  color: rgba(229, 231, 235, 0.78);
  font-size: 13px;
  line-height: 1.45;
}
.howto__list li + li { margin-top: 8px; }
.mono { font-family: var(--mono); color: rgba(229,231,235,0.9); }

@media (max-width: 1180px) {
  .page {
    grid-template-columns: 1fr;
  }
  .panel--left, .panel--right {
    position: relative;
    top: auto;
    max-height: none;
  }
  .city-card__canvasWrap { height: min(62vh, 620px); }
}