:root {
  --bg: #05060a;
  --panel-bg: #11141d;
  --panel-border: #232838;
  --text: #d6dbe6;
  --accent: #5ad1ff;
  --accent-2: #ff7b5a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: radial-gradient(ellipse at 30% 20%, #0b1026 0%, #05060a 55%, #02030a 100%);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  overflow: hidden;
}

#app {
  position: relative;
  width: 100vw;
  height: 100vh;
}

#sim-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

.panel {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 280px;
  max-height: calc(100vh - 24px);
  overflow-y: auto;
  background: linear-gradient(160deg, rgba(20, 24, 40, 0.92), rgba(12, 14, 26, 0.94));
  border: 1px solid rgba(120, 150, 255, 0.18);
  border-radius: 12px;
  padding: 14px;
  backdrop-filter: blur(8px);
  box-shadow:
    0 0 30px rgba(90, 120, 255, 0.12),
    inset 0 0 24px rgba(90, 130, 255, 0.05);
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 15px;
  letter-spacing: 0.8px;
  background: linear-gradient(90deg, #7ad4ff, #b88dff, #ff8ad4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 18px rgba(120, 150, 255, 0.25);
}
.section-header {
  margin: 14px 0 8px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: #7e8bc5;
  border-bottom: 1px solid rgba(120, 150, 255, 0.15);
  padding-bottom: 4px;
}
.lock-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}
.lock-row .lock-name {
  flex: 1 1 auto;
  color: #aab2c5;
}
.lock-row .lock-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  color: #8893ad;
}
.lock-row button {
  background: #1c2438;
  color: var(--text);
  border: 1px solid rgba(120, 150, 255, 0.2);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.lock-row button:hover {
  background: #28335a;
  border-color: var(--accent);
  color: var(--accent);
}
.follow-select {
  width: 100%;
  background: #1c2233;
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 5px 6px;
  font-size: 12px;
  cursor: pointer;
}

.control-row {
  margin-bottom: 10px;
  font-size: 12px;
}

.control-row label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 3px;
  color: #aab2c5;
  align-items: center;
}

.control-row input[type='checkbox'] {
  accent-color: var(--accent);
  cursor: pointer;
}

.control-row input[type='range'] {
  width: 100%;
  accent-color: var(--accent);
}

.control-row .val {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}

.button-row button,
.preset-select {
  flex: 1 1 auto;
  background: linear-gradient(180deg, #232c47, #18203a);
  color: var(--text);
  border: 1px solid rgba(120, 150, 255, 0.22);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.button-row button:hover {
  background: linear-gradient(180deg, #2e3a63, #20294a);
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(90, 209, 255, 0.25);
}

.preset-select {
  width: 100%;
  margin-bottom: 8px;
}

.readouts {
  position: absolute;
  left: 12px;
  bottom: 12px;
  background: linear-gradient(160deg, rgba(20, 24, 40, 0.85), rgba(12, 14, 26, 0.88));
  border: 1px solid rgba(120, 150, 255, 0.18);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  line-height: 1.6;
  min-width: 180px;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 24px rgba(90, 120, 255, 0.1);
}

.readouts span {
  color: var(--accent);
  text-shadow: 0 0 8px rgba(90, 209, 255, 0.4);
}

.home-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  background: rgba(26, 29, 36, 0.92);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  backdrop-filter: blur(8px);
  transition: all 0.15s ease;
}

.home-link:hover {
  background: var(--card-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}