:root {
  --bg: #1e293b;
  --panel: #0f172a;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --correct: #4ade80;
  --wrong: #f87171;
  --key: #334155;
  --key-hover: #475569;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.game {
  width: 100%;
  max-width: 520px;
  margin: 2rem 1rem;
  padding: 1.5rem;
  background: var(--panel);
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  text-align: center;
}

.home-btn {
  display: block;
  margin: 1.5rem auto 0;
  max-width: 220px;
  border-radius: 10px;
  overflow: hidden;
  opacity: 0.8;
  transition: opacity 0.15s, transform 0.12s;
}
.home-btn img { display: block; width: 100%; }
.home-btn:hover { opacity: 1; transform: scale(1.04); }

h1 {
  margin: 0 0 1rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Score bar — 3 sections: player, best run, computer */
.score {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 1rem;
  padding: 0.6rem 1rem;
  background: var(--bg);
  border-radius: 12px;
}
.score-side, .score-middle {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 4.5rem;
  position: relative;
}
.score-label {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.name-btn {
  max-width: 7rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: inherit;
  font-weight: 600;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  border-bottom: 1px dashed var(--muted);
}
.name-btn:hover { color: var(--accent); border-bottom-color: var(--accent); }
.name-input {
  width: 7rem;
  font-family: inherit;
  font-size: 0.8rem;
  text-align: center;
  color: var(--text);
  background: var(--key);
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 0.1rem 0.3rem;
}
.name-input:focus { outline: none; }
.name-list {
  position: absolute;
  top: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  min-width: 7rem;
  max-height: 9rem;
  overflow-y: auto;
  margin: 0;
  padding: 0.2rem;
  list-style: none;
  text-align: left;
  background: var(--panel);
  border: 1px solid var(--key-hover);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}
.name-list li {
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
}
.name-list li:hover { background: var(--key); color: var(--accent); }
.name-list li.name-add-hint { color: var(--muted); font-style: italic; }
.name-list li.name-add-hint:hover { color: var(--accent); }
.score-num {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1.1;
}
.score-side:first-child .score-num { color: var(--correct); }
.score-side:last-child  .score-num { color: var(--wrong); }
.best-num { color: var(--accent); }

.status {
  min-height: 1.5rem;
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0.5rem 0 1rem;
}
.status.won  { color: var(--correct); }
.status.lost { color: var(--wrong); }

/* 2×2 Simon button grid */
.simon-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  width: fit-content;
  margin: 0 auto 1.5rem;
}

.simon-btn {
  width: clamp(100px, 38vw, 140px);
  height: clamp(100px, 38vw, 140px);
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: box-shadow 0.1s, transform 0.08s;
}
.simon-btn:disabled { cursor: default; }

/* Dark resting colors */
#btn-green  { background: #1a3a2a; border-color: #2d6648; }
#btn-red    { background: #3a1a1a; border-color: #6b2d2d; }
#btn-yellow { background: #3a3a1a; border-color: #6b6b2d; }
#btn-blue   { background: #1a1a3a; border-color: #2d2d6b; }

/* Lit (active) states with glow */
#btn-green.lit  { background: #4ade80; box-shadow: 0 0 28px #4ade80, 0 0 8px #4ade80; transform: scale(1.06); }
#btn-red.lit    { background: #f87171; box-shadow: 0 0 28px #f87171, 0 0 8px #f87171; transform: scale(1.06); }
#btn-yellow.lit { background: #fbbf24; box-shadow: 0 0 28px #fbbf24, 0 0 8px #fbbf24; transform: scale(1.06); }
#btn-blue.lit   { background: #60a5fa; box-shadow: 0 0 28px #60a5fa, 0 0 8px #60a5fa; transform: scale(1.06); }

/* Allow hover feedback when input is enabled */
#btn-green:not(:disabled):hover  { background: #2a5a3a; }
#btn-red:not(:disabled):hover    { background: #5a2a2a; }
#btn-yellow:not(:disabled):hover { background: #5a5a2a; }
#btn-blue:not(:disabled):hover   { background: #2a2a5a; }

.new-game {
  padding: 0.7rem 1.6rem;
  font-size: 1rem;
  font-weight: 700;
  color: #06351a;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: filter 0.15s;
}
.new-game:hover { filter: brightness(1.1); }

.level-btns {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin: 0.6rem 0 0;
}
.level-btn {
  padding: 0.3rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: var(--key);
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.level-btn:hover { color: var(--text); }
.level-btn.active { color: var(--accent); border-color: var(--accent); }