:root {
  --bg-deep: #070b14;
  --bg-mid: #10182a;
  --ink: #e8eefc;
  --muted: #8b9bb8;
  --accent: #7ec8ff;
  --accent-warm: #ffb454;
  --danger: #ff6b7a;
  --success: #6dffa8;
  --panel: rgba(10, 16, 28, 0.78);
  --line: rgba(126, 200, 255, 0.18);
  --control-panel-bg: rgba(4, 10, 20, 0.78);
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-deep);
  color: var(--ink);
  font-family: "Segoe UI", "Trebuchet MS", Geneva, Verdana, sans-serif;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
}

/* Full-viewport game window */
#game-shell {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: #05080f;
}

#game-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  border: none;
  border-radius: 0;
  background: #05080f;
}

/* Control panel sits on top of the playfield as a header bar */
#control-panel {
  position: absolute;
  top: var(--playfield-top, 0);
  left: var(--playfield-left, 0);
  width: var(--playfield-width, 100%);
  right: auto;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
  padding: 10px 18px 12px;
  margin: 0;
  background: linear-gradient(
    180deg,
    var(--control-panel-bg) 0%,
    rgba(4, 10, 20, 0.55) 70%,
    rgba(4, 10, 20, 0.05) 100%
  );
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  pointer-events: none;
}

#control-panel h1 {
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  color: var(--ink);
}

#level-label,
.hint,
.stat-label,
.meter-label {
  color: var(--muted);
  font-size: 0.8rem;
}

.level-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.level-nav #level-label {
  min-width: 0;
  margin: 0;
  text-align: center;
}

.level-nav-btn {
  pointer-events: auto;
  width: 26px;
  height: 26px;
  padding: 0;
  border-radius: 6px;
  border: 1px solid rgba(126, 200, 255, 0.28);
  background: rgba(20, 36, 60, 0.85);
  color: var(--ink);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

.level-nav-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(40, 70, 110, 0.95);
}

.level-nav-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.control-panel-center {
  display: flex;
  gap: 18px;
  align-items: center;
}

.meter {
  min-width: 150px;
}

.meter-track {
  margin-top: 4px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
  border: 1px solid var(--line);
}

.meter-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #3d8cff, #7ec8ff);
  transition: width 0.08s linear, background 0.2s ease;
}

.meter-fill.low {
  background: linear-gradient(90deg, #ff6b7a, #ffb454);
}

.stat {
  text-align: center;
  min-width: 56px;
}

.stat span:last-child {
  display: block;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
  color: var(--ink);
}

/* ---- Speed dial ---- */
.speed-dial {
  width: 100px;
  text-align: center;
  --dial-accent: var(--success);
}

.speed-dial-gauge {
  position: relative;
  width: 100px;
  height: 54px;
}

.speed-dial-svg {
  position: absolute;
  left: 0;
  top: 0;
  display: block;
  width: 100px;
  height: 52px;
  overflow: visible;
}

.dial-track {
  stroke: rgba(255, 255, 255, 0.12);
}

.dial-safe-arc {
  stroke: rgba(109, 255, 168, 0.55);
  transition: stroke-dasharray 0.2s ease;
}

.dial-needle-pivot {
  position: absolute;
  left: 50%;
  top: 48px;
  width: 0;
  height: 0;
}

.dial-needle {
  position: absolute;
  left: -1.5px;
  bottom: 0;
  width: 3px;
  height: 34px;
  border-radius: 2px;
  background: var(--dial-accent);
  transform-origin: 50% 100%;
  transform: rotate(-90deg);
  transition: transform 0.08s linear, background 0.15s ease;
}

.dial-hub {
  position: absolute;
  left: -4px;
  top: -4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  border: 1.5px solid var(--dial-accent);
  box-sizing: border-box;
}

.speed-dial-readout {
  position: absolute;
  left: 0;
  right: 0;
  top: 22px;
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 3px;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

#speed-value {
  font-size: 1rem;
  font-weight: 650;
  color: var(--ink);
  line-height: 1;
}

.speed-unit {
  font-size: 0.62rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.speed-status {
  margin-top: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--dial-accent);
  min-height: 1.1em;
  transition: color 0.15s ease;
}

.speed-dial[data-status="safe"] {
  --dial-accent: var(--success);
}

.speed-dial[data-status="caution"] {
  --dial-accent: var(--accent-warm);
}

.speed-dial[data-status="danger"] {
  --dial-accent: var(--danger);
}

.control-panel-right {
  text-align: right;
}

#overlay {
  position: absolute;
  top: var(--playfield-top, 0);
  left: var(--playfield-left, 0);
  width: var(--playfield-width, 100%);
  height: var(--playfield-height, 100%);
  z-index: 3;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(ellipse 70% 55% at 50% 40%, rgba(30, 70, 120, 0.35), transparent 70%),
    rgba(4, 8, 16, 0.68);
  backdrop-filter: blur(6px);
  border-radius: 0;
}

#overlay.hidden {
  display: none;
}

.overlay-card {
  width: min(92%, 560px);
  padding: 36px 40px 28px;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(22, 36, 58, 0.96), rgba(10, 16, 28, 0.96));
  border: 1px solid rgba(126, 200, 255, 0.28);
  text-align: center;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.03),
    0 28px 70px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  pointer-events: auto;
}

.overlay-kicker {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.overlay-card h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin: 0 0 12px;
  letter-spacing: 0.03em;
  font-weight: 700;
  color: var(--ink);
}

.overlay-message {
  color: var(--muted);
  line-height: 1.5;
  margin: 0 auto 22px;
  max-width: 38ch;
  font-size: 1.02rem;
}

/* ---- Big score (win / lose summary) ---- */
.overlay-score-block {
  margin: 8px 0 22px;
  padding: 18px 16px 16px;
  border-radius: 14px;
  background: rgba(126, 200, 255, 0.06);
  border: 1px solid rgba(126, 200, 255, 0.18);
}

.overlay-score-block.hidden,
.overlay-howto.hidden,
.overlay-tips.hidden {
  display: none;
}

.score-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.score-value {
  margin: 4px 0 12px;
  font-size: clamp(2.6rem, 7vw, 3.6rem);
  font-weight: 750;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--success);
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 28px rgba(109, 255, 168, 0.25);
}

#overlay[data-mode="lost"] .score-value {
  color: var(--danger);
  text-shadow: 0 0 28px rgba(255, 107, 122, 0.22);
  font-size: clamp(1.8rem, 5vw, 2.4rem);
}

.overlay-stats {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

.overlay-stat {
  min-width: 72px;
}

.overlay-stat .stat-num {
  display: block;
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.overlay-stat .stat-cap {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---- Intro controls ---- */
.overlay-howto {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 20px;
  padding: 16px 18px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.06);
  text-align: left;
}

.howto-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.howto-label {
  margin-left: auto;
  color: var(--ink);
  font-weight: 600;
}

kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 3px 7px;
  border-radius: 6px;
  border: 1px solid rgba(126, 200, 255, 0.3);
  background: rgba(20, 36, 60, 0.9);
  color: var(--ink);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 650;
  text-align: center;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.35);
}

.overlay-tips {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  text-align: left;
  display: grid;
  gap: 8px;
}

.overlay-tips li {
  position: relative;
  padding: 8px 12px 8px 28px;
  border-radius: 8px;
  background: rgba(109, 255, 168, 0.04);
  border: 1px solid rgba(109, 255, 168, 0.1);
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.4;
}

.overlay-tips li::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px rgba(109, 255, 168, 0.5);
}

.overlay-tips strong {
  color: var(--accent-warm);
  font-weight: 650;
}

#overlay-button {
  margin-top: 4px;
  border: 1px solid rgba(126, 200, 255, 0.45);
  background: linear-gradient(180deg, #2a5080, #173052);
  color: var(--ink);
  padding: 12px 36px;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 8px 24px rgba(40, 100, 180, 0.25);
}

#overlay-button:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 10px 28px rgba(70, 140, 220, 0.35);
}

.overlay-footnote {
  margin: 14px 0 0;
  color: rgba(139, 155, 184, 0.75);
  font-size: 0.78rem;
}

.overlay-footnote kbd {
  min-width: 0;
  padding: 1px 5px;
  font-size: 0.7rem;
  box-shadow: none;
}

#overlay[data-mode="won"] .overlay-kicker {
  color: var(--success);
}

#overlay[data-mode="lost"] .overlay-kicker {
  color: var(--danger);
}

@media (max-width: 760px) {
  #control-panel {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px 12px 10px;
  }

  .control-panel-right {
    text-align: left;
  }

  .control-panel-center {
    flex-wrap: wrap;
  }

  #control-panel h1 {
    font-size: 1.05rem;
  }

  .hint {
    font-size: 0.72rem;
  }
}