* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  /* Berkeley theme: deep Berkeley-blue backdrop fading to California-gold accent. */
  background: linear-gradient(180deg, #001a33 0%, #002a52 55%, #003262 100%);
  background-attachment: fixed;
  color: #e6e8ef;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
#app {
  max-width: 1240px;
  margin: 16px auto;
  padding: 0 16px;
}
h1 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.4px;
  color: #ffffff;
}
h1::before {
  content: '🐻 ';
  color: #FDB515;  /* California Gold */
}
h1 .subtitle {
  color: #FDB515;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-left: 8px;
}
#hud {
  display: flex;
  gap: 24px;
  align-items: center;
  font-size: 16px;
  padding: 8px 0;
}
#lives { font-weight: 600; }
#status { color: #ffcf6b; flex: 1; text-align: center; }
#fps { color: #8a93a6; margin-left: auto; font-variant-numeric: tabular-nums; }
canvas {
  display: block;
  background: #0e1116;
  border: 1px solid #2a2f3a;
  border-radius: 6px;
  width: 1200px;
  max-width: 100%;
  height: auto;
}
canvas#game.hidden { display: none; }
#fast-sim-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1200px;
  max-width: 100%;
  height: 500px;
  background: #0e1116;
  border: 1px solid #2a2f3a;
  border-radius: 6px;
  color: #ffcf6b;
  font-size: 22px;
  font-weight: 600;
}
#fast-sim-placeholder.hidden { display: none; }
#fast-sim-progress {
  color: #ffcf6b;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
button.hidden { display: none; }
canvas#qchart {
  margin-top: 12px;
}
#banner {
  margin-top: 12px;
  min-height: 28px;
  font-size: 20px;
  font-weight: 700;
  text-align: center;
}

#mode-bar {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding: 10px 12px;
  background: #20242d;
  border: 1px solid #2a2f3a;
  border-radius: 6px;
}
.mode-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: #8a93a6;
}
.mode-field > span,
.mode-field > legend {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #8a93a6;
}
.mode-field select {
  background: #0e1116;
  color: #e6e8ef;
  border: 1px solid #2a2f3a;
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 14px;
  min-width: 140px;
}
.mode-field select option:disabled {
  color: #555;
}
.mode-field.qfor {
  border: 1px solid #2a2f3a;
  border-radius: 4px;
  padding: 4px 10px 6px;
  margin: 0;
}
.mode-field.qfor legend {
  padding: 0 4px;
}
.mode-field.qfor label {
  font-size: 13px;
  color: #e6e8ef;
  margin-right: 8px;
}
.mode-field.speed {
  min-width: 220px;
}
.mode-field.speed input[type=range] {
  width: 100%;
}
.mode-field.speed output {
  font-variant-numeric: tabular-nums;
  color: #e6e8ef;
}

#controls {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
#controls p {
  margin: 0;
  color: #8a93a6;
  font-size: 14px;
}
button {
  /* California Gold primary action color on Berkeley Blue text. */
  background: #FDB515;
  color: #003262;
  border: none;
  padding: 8px 18px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: #FFD773; }
button:disabled { background: #2a3550; color: #6a7388; cursor: default; }

#loading {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 12, 16, 0.85);
  font-size: 22px;
  color: #ffcf6b;
  z-index: 10;
}
#loading.hidden { display: none; }

/* --- Ladder mode UI ----------------------------------------------------- */

.mode-field.mode-toggle,
.mode-field.ladder-strategy {
  border: 1px solid #2a2f3a;
  border-radius: 4px;
  padding: 4px 10px 6px;
  margin: 0;
}
.mode-field.mode-toggle legend,
.mode-field.ladder-strategy legend {
  padding: 0 4px;
}
.mode-field.mode-toggle label,
.mode-field.ladder-strategy label {
  font-size: 13px;
  color: #e6e8ef;
  margin-right: 8px;
}

.mode-field select:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#ladder-panel {
  margin-top: 12px;
  padding: 10px 12px;
  background: #20242d;
  border: 1px solid #2a2f3a;
  border-radius: 6px;
}
#ladder-panel.hidden,
canvas#qchart.hidden { display: none; }

#ladder-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 10px;
}
#ladder-controls button {
  padding: 6px 14px;
  font-size: 13px;
}
#ladder-status {
  margin-left: auto;
  color: #ffcf6b;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

#ladder-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
#ladder-table th,
#ladder-table td {
  padding: 6px 10px;
  text-align: left;
  border-bottom: 1px solid #2a2f3a;
}
#ladder-table th {
  color: #8a93a6;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-size: 11px;
}
#ladder-table td:nth-child(1),
#ladder-table td:nth-child(3),
#ladder-table td:nth-child(4),
#ladder-table td:nth-child(5) {
  text-align: right;
  width: 1%;
  white-space: nowrap;
}
#ladder-table tr.human td { color: #ffcf6b; }
#ladder-table tr.unavailable td {
  color: #555;
  text-decoration: line-through;
}
#ladder-table .tag {
  color: #8a93a6;
  font-size: 11px;
  text-decoration: none;
}

/* --- Replay mode UI ---------------------------------------------------- */

#replay-panel {
  margin-top: 12px;
  padding: 10px 12px;
  background: #20242d;
  border: 1px solid #2a2f3a;
  border-radius: 6px;
}
#replay-panel.hidden { display: none; }

#replay-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
#replay-controls .replay-select-label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #8a93a6;
}
#replay-controls select {
  background: #0e1116;
  color: #e6e8ef;
  border: 1px solid #2a2f3a;
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 13px;
  min-width: 380px;
}
#replay-controls button {
  padding: 6px 14px;
  font-size: 13px;
}
#replay-controls input[type=range] {
  flex: 1;
  min-width: 200px;
}
#replay-frame-info {
  color: #ffcf6b;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
#replay-outcome {
  margin-left: auto;
  color: #ffcf6b;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}