:root {
  --panel-bg: rgba(18, 23, 32, 0.82);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text-main: #eef3f7;
  --text-dim: #9aa8b5;
  --accent: #2fb4c6;
  --accent-strong: #1fd0ff;
  --danger: #e0605b;
  --good: #5be07a;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a1420;
  color: var(--text-main);
}

#viewport {
  position: fixed;
  inset: 0;
  z-index: 0;
}
#viewport canvas { display: block; }

.panel {
  position: fixed;
  top: 84px;
  bottom: 16px;
  width: 232px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  backdrop-filter: blur(10px);
  padding: 14px;
  z-index: 10;
  overflow-y: auto;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#leftPanel { left: 16px; }
#rightPanel { right: 16px; }

.panelHeader {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 2px;
}
.panelHeader.spaced { margin-top: 10px; }

#titleBar {
  position: fixed;
  top: 14px;
  left: 16px;
  z-index: 10;
  pointer-events: none;
}
.titleMain { font-size: 17px; font-weight: 700; text-shadow: 0 2px 8px rgba(0,0,0,0.6); }
.titleSub { font-size: 11px; color: var(--text-dim); text-shadow: 0 2px 6px rgba(0,0,0,0.6); }

.banner {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 12px;
  backdrop-filter: blur(10px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  max-width: 60vw;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.banner button {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
  line-height: 1;
}
.banner.hidden { opacity: 0; transform: translateX(-50%) translateY(-12px); pointer-events: none; }

.toolGrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.toolBtn {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
  border-radius: 9px;
  color: var(--text-main);
  padding: 9px 6px;
  font-size: 11.5px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  transition: background 0.15s, border-color 0.15s;
}
.toolIcon { font-size: 13px; letter-spacing: 1px; opacity: 0.85; }
.toolBtn:hover { background: rgba(255,255,255,0.09); }
.toolBtn.active {
  background: rgba(47, 180, 198, 0.22);
  border-color: var(--accent);
  color: #d8f6fb;
}

.hint {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.4;
  min-height: 30px;
}

.rowBtns {
  display: flex;
  gap: 6px;
}
.miniBtn {
  flex: 1;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-border);
  color: var(--text-main);
  border-radius: 8px;
  padding: 8px 4px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s;
}
.miniBtn:hover { background: rgba(255,255,255,0.13); }
.miniBtn:disabled { opacity: 0.35; cursor: not-allowed; }
.miniBtn.wide { flex: 1; }
.miniBtn.danger { color: #ffb3af; border-color: rgba(224,96,91,0.4); }
.miniBtn.danger:hover { background: rgba(224,96,91,0.18); }

.fullBtn {
  width: 100%;
  border: none;
  border-radius: 9px;
  padding: 11px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 4px;
  transition: filter 0.15s, transform 0.1s;
}
.fullBtn:active { transform: scale(0.98); }
.fullBtn.primary {
  background: linear-gradient(135deg, #1fd0ff, #1f8fff);
  color: #05202b;
  font-size: 14px;
  padding: 13px;
  box-shadow: 0 4px 16px rgba(31,208,255,0.35);
}
.fullBtn.primary:hover { filter: brightness(1.08); }
.fullBtn.subtle {
  background: rgba(255,255,255,0.05);
  color: var(--text-main);
  border: 1px solid var(--panel-border);
}
.fullBtn.subtle:hover { background: rgba(255,255,255,0.1); }

.pillGroup {
  display: flex;
  gap: 6px;
  margin-bottom: 4px;
}
.pill {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  border-radius: 7px;
  padding: 7px 2px;
  font-size: 11.5px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.pill:hover { background: rgba(255,255,255,0.1); }
.pill.active {
  background: rgba(31,208,255,0.18);
  border-color: var(--accent-strong);
  color: #d8f6fb;
  font-weight: 600;
}

.toggleRow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  padding: 4px 2px;
  cursor: pointer;
  user-select: none;
}
.toggleRow input { accent-color: var(--accent-strong); width: 15px; height: 15px; cursor: pointer; }

.metrics {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.metricRow {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 12px;
  color: var(--text-dim);
  border-bottom: 1px dashed rgba(255,255,255,0.08);
  padding-bottom: 5px;
}
.metricRow b {
  color: var(--text-main);
  font-size: 13px;
  font-weight: 700;
}

#statusBar {
  position: fixed;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  font-size: 11.5px;
  color: var(--text-dim);
  background: rgba(10,16,24,0.6);
  padding: 5px 12px;
  border-radius: 20px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}
#statusBar.visible { opacity: 1; }

@media (max-width: 900px) {
  .panel { width: 190px; padding: 10px; }
}