:root {
  --bg: #0a0a14;
  --bg-2: #11122440;
  --panel: #14152a;
  --panel-2: #1b1d38;
  --ink: #e8e9f5;
  --ink-dim: #9aa0c5;
  --accent: #7c5cff;
  --accent-2: #28d8c8;
  --goal: #ffd166;
  --danger: #ff5d73;
  --line: #2a2c52;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 800px at 15% -10%, #1b1148 0%, transparent 55%),
    radial-gradient(1000px 700px at 110% 120%, #07343a 0%, transparent 50%),
    var(--bg);
  min-height: 100%;
}

.app {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px clamp(14px, 3vw, 32px) 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100vh;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

.brand h1 {
  font-size: clamp(20px, 3vw, 30px);
  margin: 0;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-orb {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff 0%, var(--accent) 45%, #2a1c66 100%);
  box-shadow: 0 0 18px rgba(124, 92, 255, 0.8), inset 0 0 8px rgba(255, 255, 255, 0.4);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

.level-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
}

.level-label {
  text-align: center;
  min-width: 130px;
  line-height: 1.1;
}

.level-label span {
  display: block;
  font-weight: 600;
}

.level-label small {
  color: var(--ink-dim);
  font-size: 12px;
}

/* Stage */
.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 18px;
  align-items: start;
}

.canvas-wrap {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow);
}

#viewport {
  display: block;
  width: 100%;
  height: min(68vh, 620px);
  border-radius: 10px;
  overflow: hidden;
  background:
    radial-gradient(900px 600px at 50% 50%, #10122b 0%, #070713 100%);
  cursor: grab;
  touch-action: none;
}

#viewport:active {
  cursor: grabbing;
}

#viewport canvas {
  display: block;
}

.status-pill {
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  background: rgba(20, 21, 42, 0.85);
  border: 1px solid var(--line);
  color: var(--ink-dim);
  backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.status-pill.show {
  opacity: 1;
}

.status-pill.win {
  color: var(--goal);
  border-color: var(--goal);
}

.status-pill.fail {
  color: var(--danger);
  border-color: var(--danger);
}

/* Telemetry HUD */
.hud {
  position: absolute;
  top: 22px;
  left: 22px;
  width: 210px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(12, 13, 28, 0.72);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-variant-numeric: tabular-nums;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

.hud.show {
  opacity: 1;
  transform: translateY(0);
}

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

.hud-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.hud-value small {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-dim);
  margin-left: 2px;
}

.hud-speed {
  margin-bottom: 12px;
}

.hud-bar {
  height: 5px;
  margin-top: 6px;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.18);
  overflow: hidden;
}

.hud-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.08s linear, background 0.2s ease;
}

.hud-bar-fill.hot {
  background: linear-gradient(90deg, var(--goal), var(--danger));
}

.hud-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 12px;
}

.hud-cell .hud-value {
  font-size: 15px;
}

@media (max-width: 640px) {
  .hud {
    width: 168px;
    top: 16px;
    left: 16px;
    padding: 10px;
  }
  .hud-value {
    font-size: 17px;
  }
}

/* Panel */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: var(--shadow);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.stat-row-2 {
  grid-template-columns: repeat(2, 1fr);
  margin-top: 10px;
}

.stat {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px;
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--ink-dim);
}

.stat-value {
  display: block;
  font-size: 22px;
  font-weight: 700;
  margin-top: 2px;
}

.controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.btn {
  font: inherit;
  font-weight: 600;
  border-radius: 12px;
  border: 1px solid var(--line);
  padding: 12px 16px;
  cursor: pointer;
  color: var(--ink);
  background: var(--panel-2);
  transition: transform 0.08s ease, background 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
  border-color: var(--accent);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(90deg, var(--accent), #5a8bff);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 18px rgba(124, 92, 255, 0.35);
}

.btn-ghost {
  background: transparent;
}

.btn-sm {
  padding: 8px 10px;
  font-size: 12.5px;
}

/* Tool rows (placement height, assist) */
.tool-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  color: var(--ink-dim);
}

.tool-row > span {
  white-space: nowrap;
}

.tool-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}

.tool-row-buttons {
  justify-content: flex-start;
}

.tool-note {
  font-size: 12px;
  color: var(--ink-dim);
}

/* Audio bar */
.audio-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.audio-bar .btn-sm[aria-pressed="false"] {
  opacity: 0.6;
}

.volume-control {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 90px;
  font-size: 12px;
  color: var(--ink-dim);
}

.volume-control input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}

.rules h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--ink-dim);
  margin: 0 0 8px;
}

.rules ol {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  color: var(--ink);
}

.hint {
  margin: 10px 0 0;
  font-size: 12.5px;
  color: var(--ink-dim);
}

.footer {
  text-align: center;
  color: var(--ink-dim);
  font-size: 12.5px;
  margin-top: auto;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(5, 5, 14, 0.7);
  backdrop-filter: blur(4px);
  z-index: 20;
}

.modal[hidden] {
  display: none;
}

.modal-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  width: min(380px, 90vw);
  text-align: center;
  box-shadow: var(--shadow);
  animation: pop 0.25s ease;
}

@keyframes pop {
  from { transform: scale(0.92); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-card h2 {
  margin: 0 0 8px;
  color: var(--goal);
}

.modal-card p {
  margin: 0 0 20px;
  color: var(--ink-dim);
}

.win-score {
  margin: -8px 0 20px;
  font-size: 20px;
  font-weight: 700;
  color: var(--goal);
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

/* Responsive */
@media (max-width: 820px) {
  .stage {
    grid-template-columns: 1fr;
  }
  .panel {
    order: 2;
  }
}