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

:root {
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Courier New", monospace;
  --hot: #FF4D2E;
  --violet: #7A4DFF;
  --gold: #FFB020;
  --mint: #35E0C0;
  --sky: #4DC4FF;
  --dim: #9AA8CC;
  --text: #EAF0FF;
  --bg: #070A1A;
}

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

#game {
  display: block;
  width: 100vw;
  height: 100vh;
}

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  background: radial-gradient(ellipse at center, rgba(10, 14, 34, 0.9) 0%, rgba(4, 6, 18, 0.96) 70%);
  backdrop-filter: blur(3px);
  text-align: center;
  padding: 2rem 1.5rem;
  overflow-y: auto;
}

.overlay.hidden {
  display: none;
}

.overlay h1 {
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  letter-spacing: 0.26em;
  font-weight: 700;
  background: linear-gradient(90deg, #4DC4FF 0%, #35E0C0 35%, #FFB020 70%, #FF4D2E 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 22px rgba(255, 77, 46, 0.45));
}

.tagline {
  font-size: 1rem;
  color: var(--dim);
  letter-spacing: 0.18em;
}

.howto {
  list-style: none;
  max-width: 38rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: #D6E2FF;
  line-height: 1.5;
}

.howto strong {
  color: var(--gold);
}

.menu-diff {
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  color: var(--mint);
  text-transform: uppercase;
}

.menu-best {
  font-size: 0.88rem;
  color: var(--dim);
  letter-spacing: 0.06em;
}

.start-hint {
  margin-top: 0.4rem;
  font-size: 1.1rem;
  color: var(--gold);
  animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.new-best {
  font-size: 0.95rem;
  font-weight: bold;
  letter-spacing: 0.25em;
  color: #070A1A;
  background: linear-gradient(90deg, var(--gold), var(--hot));
  padding: 0.35rem 1rem;
  border-radius: 999px;
  box-shadow: 0 0 26px rgba(255, 77, 46, 0.5);
}

.new-best.hidden {
  display: none;
}

#final-stats {
  display: grid;
  grid-template-columns: auto auto;
  gap: 0.35rem 1.8rem;
  font-size: 1.05rem;
  text-align: left;
}

#final-stats .label { color: var(--dim); }

#final-stats .value {
  color: #ffffff;
  text-align: right;
  font-weight: bold;
}

/* ---- High score table ---- */
.score-list { min-width: min(24rem, 88vw); }

.score-head {
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--dim);
  margin-bottom: 0.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(154, 168, 204, 0.25);
}

.score-list ol {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.score-list li {
  display: grid;
  grid-template-columns: 1.4rem 4.5rem 1fr;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.28rem 0.5rem;
  border-radius: 4px;
  font-size: 0.85rem;
  text-align: left;
}

.score-list li.me {
  background: rgba(255, 77, 46, 0.16);
  box-shadow: inset 0 0 0 1px rgba(255, 77, 46, 0.4);
}

.score-list .rank { color: var(--dim); }
.score-list .sc { color: #ffffff; font-weight: bold; text-align: right; }
.score-list .meta { color: var(--dim); font-size: 0.78rem; }

/* ---- Buttons & controls ---- */
.btn {
  font-family: inherit;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: var(--sky);
  background: rgba(77, 196, 255, 0.07);
  border: 1px solid rgba(77, 196, 255, 0.45);
  border-radius: 5px;
  padding: 0.55rem 1.4rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.btn:hover {
  background: rgba(77, 196, 255, 0.18);
  color: #ffffff;
  box-shadow: 0 0 18px rgba(77, 196, 255, 0.3);
}

a.btn {
  text-decoration: none;
  display: inline-block;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  align-items: center;
}

.btn-danger {
  color: #FF4D6D;
  background: rgba(255, 45, 110, 0.07);
  border-color: rgba(255, 45, 110, 0.45);
}

.btn-danger:hover {
  background: rgba(255, 45, 110, 0.18);
  box-shadow: 0 0 18px rgba(255, 45, 110, 0.25);
}

/* Second press confirms — guards against ending a good run by accident */
.btn-danger.armed {
  color: #070A1A;
  background: #FF4D6D;
  border-color: #FF4D6D;
  font-weight: bold;
}

.btn-danger.hidden { display: none; }

.settings-body {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  min-width: min(26rem, 90vw);
  max-width: 32rem;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.setting-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--dim);
  text-transform: uppercase;
}

.hint {
  font-size: 0.75rem;
  color: rgba(154, 168, 204, 0.75);
  text-align: left;
  line-height: 1.45;
}

.hint strong { color: var(--gold); }

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.chip {
  font-family: inherit;
  font-size: 0.85rem;
  color: var(--dim);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(154, 168, 204, 0.35);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.chip:hover {
  color: #ffffff;
  border-color: rgba(53, 224, 192, 0.7);
}

.chip.selected {
  color: #070A1A;
  background: linear-gradient(90deg, var(--mint), var(--sky));
  border-color: transparent;
  font-weight: bold;
  box-shadow: 0 0 18px rgba(53, 224, 192, 0.35);
}

.toggle {
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: bold;
  letter-spacing: 0.12em;
  min-width: 4rem;
  color: #070A1A;
  background: var(--mint);
  border: none;
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  cursor: pointer;
}

.toggle.off {
  color: var(--dim);
  background: rgba(154, 168, 204, 0.2);
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

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

.vol-num {
  min-width: 2.4rem;
  text-align: right;
  color: var(--text);
  font-size: 0.9rem;
}