:root {
  --bg: #070b14;
  --panel: rgba(10, 16, 28, 0.9);
  --line: rgba(255, 255, 255, 0.08);
  --text: #eef3ff;
  --muted: #8b97b0;
  --accent: #48e0ff;
  --accent-ink: #041018;
  --warm: #ff6a3d;
  --font-display: "Bebas Neue", sans-serif;
  --font-body: "Manrope", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(72, 224, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(72, 224, 255, 0.04) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse at 35% 40%, black 15%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  width: 50vw;
  height: 50vw;
  left: 5%;
  top: 8%;
  background: radial-gradient(circle, rgba(72, 224, 255, 0.16), transparent 65%);
  filter: blur(18px);
  pointer-events: none;
  z-index: 0;
  animation: drift 14s ease-in-out infinite alternate;
}

.bg-stars {
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 28% 62%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1.5px 1.5px at 70% 22%, rgba(72,224,255,0.7), transparent),
    radial-gradient(1px 1px at 82% 70%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 48% 40%, rgba(255,255,255,0.55), transparent);
  pointer-events: none;
  z-index: 0;
  opacity: 0.8;
}

@keyframes drift {
  from { transform: translate(-3%, -2%) scale(1); }
  to { transform: translate(5%, 3%) scale(1.08); }
}

.top {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  font-family: var(--font-display);
  font-size: 28px;
  letter-spacing: 0.06em;
  color: var(--text);
  text-decoration: none;
}

.brand span { color: var(--accent); }

.top-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

#config-code {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
}

.nav-btn {
  border: 1px solid var(--line);
  background: var(--accent);
  color: var(--accent-ink);
  padding: 8px 14px;
  font: 600 13px/1 var(--font-body);
  cursor: pointer;
  border-radius: 999px;
}

.stage {
  position: relative;
  z-index: 1;
  height: calc(100% - 65px);
  display: grid;
  grid-template-columns: 1.3fr 0.95fr;
}

.viewport { position: relative; min-height: 0; }

#rocket-canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#rocket-canvas:active { cursor: grabbing; }

.viewport-hint {
  position: absolute;
  left: 22px;
  bottom: 20px;
  font-size: 12px;
  color: var(--muted);
}

.floating-tag {
  position: absolute;
  top: 20px;
  left: 22px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.55);
  backdrop-filter: blur(8px);
  font-size: 12px;
  color: var(--muted);
  animation: fadeUp 0.8s ease both;
}

.hud {
  position: absolute;
  right: 18px;
  bottom: 18px;
  display: flex;
  gap: 10px;
}

.hud > div {
  min-width: 72px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.6);
  backdrop-filter: blur(8px);
}

.hud label {
  display: block;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hud strong {
  font-size: 14px;
  color: var(--accent);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel {
  border-left: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(16px);
  padding: 22px 22px 28px;
  overflow: auto;
  animation: panelIn 0.7s ease both;
}

@keyframes panelIn {
  from { opacity: 0; transform: translateX(16px); }
  to { opacity: 1; transform: translateX(0); }
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.panel h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 4.5vw, 52px);
  line-height: 0.95;
  margin-bottom: 10px;
}

.lead {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
  margin-bottom: 18px;
  max-width: 38ch;
}

.section { margin-bottom: 18px; }

.section h2 {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
  font-weight: 600;
}

.part-tabs,
.chip-row,
.preset-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.part-tab,
.chip,
.preset {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  padding: 8px 11px;
  font: 600 12px/1 var(--font-body);
  cursor: pointer;
  border-radius: 8px;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.part-tab:hover,
.chip:hover,
.preset:hover {
  border-color: rgba(72, 224, 255, 0.4);
}

.part-tab.active,
.chip.active {
  background: rgba(72, 224, 255, 0.14);
  border-color: var(--accent);
  color: var(--accent);
}

.preset {
  border-radius: 999px;
}

.preset:hover,
.preset.active {
  background: var(--warm);
  border-color: var(--warm);
  color: #fff;
}

.swatches {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.swatch {
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.12);
}

.swatch.active {
  border-color: #fff;
  box-shadow: 0 0 0 2px var(--accent);
}

.toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
}

.toggle input { accent-color: var(--accent); }

#flame-range {
  width: 100%;
  margin-bottom: 10px;
  accent-color: var(--accent);
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 8px;
  margin-top: 6px;
}

.btn {
  border: none;
  padding: 13px 12px;
  font: 700 12px/1 var(--font-body);
  letter-spacing: 0.04em;
  cursor: pointer;
  border-radius: 10px;
}

.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}

.note {
  margin-top: 14px;
  font-size: 11px;
  color: #66718a;
}

@media (max-width: 980px) {
  body { overflow: auto; }
  .stage { grid-template-columns: 1fr; height: auto; }
  .viewport { height: 48vh; }
  .panel { border-left: none; border-top: 1px solid var(--line); }
  .hud { display: none; }
  .actions { grid-template-columns: 1fr 1fr; }
  .actions .primary { grid-column: 1 / -1; }
}