:root {
  --bg: #ffffff;
  --panel-bg: #ffffff;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #111827;
  --text-muted: #6b7280;
  --accent: #111827;
  --accent-soft: #f3f4f6;
  --rec: #ef4444;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.06);
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "Consolas", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

#app { position: fixed; inset: 0; }

#canvas { display: block; width: 100%; height: 100%; }

/* ---------- HUD ---------- */
#hud {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  user-select: none;
}

#hud-status { display: flex; gap: 6px; align-items: center; }

.chip {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-transform: uppercase;
}

.chip.hidden { display: none; }

#hud-rec { color: var(--rec); border-color: rgba(239,68,68,0.4); }

#hud-stats {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--mono);
  display: flex;
  gap: 12px;
}

/* ---------- Panel toggle ---------- */
#panelToggle {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s ease;
}
#panelToggle:hover { transform: scale(1.05); }

/* ---------- Panel ---------- */
#panel {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 340px;
  background: var(--panel-bg);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transform: translateX(0);
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1);
  z-index: 10;
}
#panel.closed { transform: translateX(100%); }

#panelHeader {
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
#panelHeader h1 { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
#panelHeader .subtitle { margin: 3px 0 0; font-size: 12px; color: var(--text-muted); }
#panelClose {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  padding: 4px;
}
#panelClose:hover { color: var(--text); }

#panelContent {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0 24px;
}

/* ---------- Sections ---------- */
.section { border-bottom: 1px solid var(--border); }
.section:last-child { border-bottom: none; }

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 14px 18px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
}
.section-head:hover { background: var(--accent-soft); }
.section-head .chev { transition: transform 0.2s ease; color: var(--text-muted); font-size: 10px; }
.section.closed .chev { transform: rotate(-90deg); }
.section.closed .section-body { display: none; }

.section-body { padding: 2px 18px 16px; }

.hint {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0 0 10px;
}

/* ---------- Controls ---------- */
.field { margin-bottom: 12px; }

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}
.field-label { font-size: 12px; color: var(--text); }
.field-value {
  font-size: 11px;
  font-family: var(--mono);
  color: var(--text-muted);
  background: var(--accent-soft);
  padding: 1px 6px;
  border-radius: 4px;
  min-width: 46px;
  text-align: right;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--border-strong);
  cursor: pointer;
}
input[type="range"]:hover::-webkit-slider-thumb { transform: scale(1.1); }

input[type="number"] {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--text);
  background: #fff;
}
input[type="number"]:focus { outline: none; border-color: var(--accent); }

input[type="text"] {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text);
}

select {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text);
  background: #fff;
  cursor: pointer;
}

/* checkbox */
.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 12px;
}
.switch input { display: none; }
.switch .track {
  width: 30px;
  height: 18px;
  border-radius: 999px;
  background: var(--border-strong);
  position: relative;
  transition: background 0.2s ease;
}
.switch .track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s ease;
}
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(12px); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}
.btn:hover { background: var(--accent-soft); }
.btn:active { transform: scale(0.97); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: #1f2937; }
.btn.danger { color: var(--rec); border-color: rgba(239,68,68,0.4); }
.btn.danger:hover { background: rgba(239,68,68,0.08); }
.btn.active { background: var(--rec); color: #fff; border-color: var(--rec); }
.btn.small { padding: 4px 9px; font-size: 11px; }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.btn-row .btn { flex: 1; }

/* ---------- Bot cards ---------- */
.bot-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 10px;
  background: #fafafa;
}
.bot-card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.bot-swatch {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  flex-shrink: 0;
}
.bot-name {
  font-size: 13px;
  font-weight: 600;
  flex: 1;
  border: 1px solid transparent;
  background: transparent;
  padding: 3px 5px;
  border-radius: 5px;
  color: var(--text);
  min-width: 0;
}
.bot-name:hover { border-color: var(--border); }
.bot-name:focus { outline: none; border-color: var(--accent); background: #fff; }

input[type="color"].bot-swatch {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  background: none;
  cursor: pointer;
  flex-shrink: 0;
}
input[type="color"].bot-swatch::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"].bot-swatch::-webkit-color-swatch { border: none; border-radius: 3px; }
input[type="color"].bot-swatch::-moz-color-swatch { border: none; border-radius: 3px; }
.bot-remove {
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 4px;
}
.bot-remove:hover { color: var(--rec); }

/* ---------- State list ---------- */
.state-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 6px;
  font-size: 12px;
}
.state-item .name { flex: 1; font-weight: 500; }
.state-item .meta { font-size: 10px; color: var(--text-muted); font-family: var(--mono); }

.sep { height: 1px; background: var(--border); margin: 12px 0; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; border: 2px solid #fff; }
::-webkit-scrollbar-track { background: transparent; }