:root {
  --bg: #0a0d14;
  --panel: #131a2a;
  --panel-edge: #1e2940;
  --key: #1a2338;
  --key-edge: #2a3856;
  --text: #e8ecf4;
  --text-dim: #8a94ab;
  --accent: #22d3ee;
  --correct: #34d399;
  --hold: #fbbf24;
  --error: #f87171;
  --radius: 10px;
  --mono: 'JetBrains Mono', 'Cascadia Code', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background:
    radial-gradient(1200px 600px at 70% -10%, rgba(34, 211, 238, 0.08), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(251, 191, 36, 0.05), transparent 60%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

#app { width: min(1100px, 94vw); padding: 3rem 0 4rem; }
.hidden { display: none !important; }
.screen { animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } }

/* ---------- menu ---------- */
h1 {
  font-size: 2.6rem; font-weight: 800; letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.subtitle { color: var(--text-dim); margin: 0.4rem 0 2.2rem; }

#stage-list { list-style: none; display: grid; gap: 0.7rem; }
.stage-card {
  display: flex; align-items: center; gap: 1.1rem;
  background: linear-gradient(180deg, var(--panel), rgba(19, 26, 42, 0.6));
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius);
  padding: 1rem 1.3rem;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.stage-card:hover:not(.locked) {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(34, 211, 238, 0.12);
}
.stage-card.locked { opacity: 0.45; cursor: default; }
.stage-num { font-family: var(--mono); color: var(--accent); font-size: 0.9rem; }
.stage-info { display: flex; flex-direction: column; gap: 0.15rem; flex: 1; }
.stage-name { font-weight: 600; }
.stage-hint { color: var(--text-dim); font-size: 0.85rem; }
.stage-stats { font-family: var(--mono); color: var(--text-dim); font-size: 0.85rem; }

#btn-reset {
  margin-top: 1.6rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}
#btn-reset.armed {
  border-color: var(--error);
  color: var(--error);
  box-shadow: 0 0 16px rgba(248, 113, 113, 0.15);
}

/* ---------- game ---------- */
#game-header { display: flex; align-items: center; gap: 1.2rem; margin-bottom: 2.5rem; }
#game-stage-name { flex: 1; font-size: 1.1rem; font-weight: 600; }
#live-stats { display: flex; gap: 1.2rem; font-family: var(--mono); color: var(--text-dim); font-size: 0.9rem; }
#live-stats #live-wpm { color: var(--accent); }

button {
  font: inherit; color: var(--text);
  background: var(--key); border: 1px solid var(--key-edge);
  border-radius: 8px; padding: 0.5rem 1rem; cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
button:hover { border-color: var(--accent); box-shadow: 0 0 16px rgba(34, 211, 238, 0.15); }

#prompt {
  font-family: var(--mono); font-size: 2.2rem; letter-spacing: 0.06em;
  text-align: center; min-height: 3.2rem; margin-bottom: 2.5rem;
}
.ch { display: inline-block; min-width: 0.6ch; transition: color 0.1s ease; }
.ch.typed { color: var(--correct); }
.ch.current {
  color: var(--text);
  border-bottom: 3px solid var(--accent);
  animation: pulse 1.2s ease-in-out infinite;
}
.ch.pending { color: var(--text-dim); opacity: 0.5; }
.ch.space { opacity: 0.35; }
@keyframes pulse { 50% { border-color: transparent; } }
.ch.error-flash { animation: shake 0.25s ease; color: var(--error); }
@keyframes shake {
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

/* ---------- keyboard diagram ---------- */
#keyboard { display: flex; justify-content: center; align-items: flex-start; gap: 4.5rem; padding: 1.5rem 0 0.5rem; user-select: none; }

/* One continuous case per half: an SVG outline that steps with the column
   stagger and wraps the thumb fan, like the physical board. Keys are
   absolutely positioned over it by the renderer's geometry table. */
.kb-half {
  position: relative;
  filter: drop-shadow(0 22px 38px rgba(0, 0, 0, 0.45));
}
.kb-half-L { transform: rotate(-3deg); }
.kb-half-R { transform: rotate(3deg); }

.kb-case { position: absolute; inset: 0; width: 100%; height: 100%; }

.kb-key {
  position: absolute;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 0.95rem;
  color: #cdd4e2;
  background: linear-gradient(180deg, #3c4353 0%, #2c323d 55%, #262b34 100%);
  border: 1px solid #454d5e;
  border-radius: 8px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.09),
    inset 0 -3px 4px rgba(0, 0, 0, 0.4),
    0 2px 3px rgba(0, 0, 0, 0.35),
    0 0 12px 1px var(--glow, transparent);
  transform: translateY(calc(var(--lift, 0px) + var(--dy, 0px))) rotate(var(--rot, 0deg));
  transition: background 0.1s ease, box-shadow 0.15s ease, border-color 0.1s ease, transform 0.1s ease;
}
.kb-key-wide-legend { font-size: 0.62rem; color: var(--text-dim); }
.kb-key-blank { opacity: 0.3; }
.kb-key.kb-target {
  --lift: -2px;
  background: var(--correct); color: #06281c; border-color: var(--correct);
  box-shadow: 0 0 22px rgba(52, 211, 153, 0.55);
  font-weight: 700;
}
.kb-key.kb-hold {
  background: var(--hold); color: #2d2005; border-color: var(--hold);
  box-shadow: 0 0 22px rgba(251, 191, 36, 0.5);
  font-weight: 700;
}
#layer-hint { text-align: center; color: var(--text-dim); margin-top: 1.6rem; font-size: 0.9rem; }

/* ---------- results ---------- */
#screen-results { text-align: center; padding-top: 4rem; }
#results-title { font-size: 2rem; margin-bottom: 2rem; }
#results-stats { display: flex; justify-content: center; gap: 3rem; margin-bottom: 2.5rem; }
.stat { display: flex; flex-direction: column; }
.stat-value { font-family: var(--mono); font-size: 3rem; font-weight: 700; color: var(--accent); }
.stat-label { color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.75rem; }
#results-mistakes { margin-bottom: 2.5rem; color: var(--text-dim); }
#results-mistakes h3 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.8rem; }
.miss { display: inline-block; margin: 0.2rem 0.4rem; font-family: var(--mono); }
.miss kbd {
  background: var(--key); border: 1px solid var(--error); border-radius: 6px;
  padding: 0.15rem 0.5rem; color: var(--error);
}
.flawless { color: var(--correct); }
#results-actions { display: flex; justify-content: center; gap: 1rem; }
#btn-next { border-color: var(--accent); color: var(--accent); }

/* ---------- portrait / narrow screens (phone) ---------- */
@media (max-width: 760px) {
  html { font-size: 11px; }
  #app { width: 94vw; padding: 1.4rem 0 2.5rem; }
  h1 { font-size: 2.2rem; }
  #keyboard { flex-direction: column; align-items: center; gap: 2rem; }
  .kb-half-L { transform: rotate(-1.5deg); }
  .kb-half-R { transform: rotate(1.5deg); }
  #game-header { flex-wrap: wrap; row-gap: 0.6rem; }
  #prompt { font-size: 1.9rem; min-height: 2.8rem; margin-bottom: 1.6rem; }
  #layer-hint { margin-top: 1rem; }
  #results-stats { gap: 2rem; }
}