:root {
  --bg: #0e0f13;
  --panel: #171922;
  --text: #e8e9ee;
  --muted: #8b90a1;
  --accent: #6ea8fe;
  --ok: #4ade80;
  --bad: #f87171;
  --border: #262a38;
}

* { box-sizing: border-box; }

html { height: 100%; }

body {
  margin: 0;
  min-height: 100%;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 1.5rem;
}

#app {
  width: min(760px, 100%);
  margin: 0 auto;
}

.panel {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}

h1 { margin: 0 0 0.25rem; font-size: 1.6rem; }
h2 { margin: 1.5rem 0 0.75rem; font-size: 1rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.sub { color: var(--muted); margin: 0.25rem 0 0; }
.warn { color: var(--bad); font-size: 0.85rem; }
.fineprint { color: var(--muted); font-size: 0.75rem; margin-top: 1.25rem; }

kbd {
  background: #23273a;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0.1em 0.45em;
  font-family: ui-monospace, monospace;
  font-size: 0.85em;
}

/* setup */
.dict-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 0.75rem; }
.dict-option {
  display: flex; flex-direction: column; gap: 0.25rem;
  border: 1px solid var(--border); border-radius: 10px;
  padding: 0.85rem; cursor: pointer; transition: border-color 0.15s, background 0.15s;
}
.dict-option:hover { border-color: var(--accent); }
.dict-option.on { border-color: var(--accent); background: rgba(110, 168, 254, 0.08); }
.dict-option input { position: absolute; opacity: 0; }
.dict-name { font-weight: 600; }
.dict-blurb { font-size: 0.8rem; color: var(--muted); }
.dict-count { font-size: 0.72rem; color: var(--accent); }

.setup-row { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; margin: 1.5rem 0 0; }
.setup-row label { display: flex; align-items: center; gap: 0.5rem; color: var(--muted); font-size: 0.9rem; }
.train-toggle { flex-wrap: wrap; }
select {
  background: #23273a; color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.4rem 0.6rem; font-size: 0.9rem;
}

.btn-big {
  background: var(--accent); color: #0b1020; border: none; border-radius: 10px;
  font-size: 1rem; font-weight: 700; padding: 0.75rem 1.5rem; cursor: pointer;
  margin-top: 1.25rem; transition: filter 0.15s;
}
.btn-big:hover { filter: brightness(1.1); }
.btn-big:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary { background: #2b3046; color: var(--text); }
.btn-quiet {
  background: none; border: none; color: var(--muted); cursor: pointer;
  font-size: 0.85rem; padding: 0.5rem;
}
.btn-quiet:hover { color: var(--text); }

.cat-row { margin-top: 0.75rem; }
.cat-label { color: var(--muted); font-size: 0.85rem; }
.cat-chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  border: 1px solid var(--border); border-radius: 999px;
  padding: 0.25rem 0.7rem; font-size: 0.8rem; color: var(--muted);
  cursor: pointer; transition: border-color 0.15s, color 0.15s;
}
.cat-chip.on { border-color: var(--accent); color: var(--text); background: rgba(110, 168, 254, 0.08); }
.cat-chip input { position: absolute; opacity: 0; }
.setup-row .btn-big { margin-top: 0; }

/* test */
.hud { display: flex; align-items: baseline; gap: 1.25rem; margin-bottom: 1rem; }
#timer { font-size: 1.5rem; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
#live-wpm { color: var(--muted); font-variant-numeric: tabular-nums; }
.hud .btn-quiet { margin-left: auto; }
.hud-target { color: var(--accent); font-size: 0.8rem; font-family: ui-monospace, monospace; }

.word-stream {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 1.35rem; line-height: 2.1;
  min-height: 8.4rem; max-height: 8.4rem; overflow: hidden;
  color: var(--muted); word-spacing: 0.35em;
  margin-bottom: 1rem; user-select: none;
}
.w.current { background: rgba(110, 168, 254, 0.12); border-radius: 6px; padding: 0.1em 0.2em; color: var(--text); }
.w .ok { color: var(--ok); }
.w .bad { color: var(--bad); text-decoration: underline; }

.typebox {
  width: 100%; font-size: 1.25rem; font-family: ui-monospace, monospace;
  background: #10121a; color: var(--text);
  border: 1px solid var(--border); border-radius: 10px; padding: 0.75rem 1rem;
  outline: none;
}
.typebox:focus { border-color: var(--accent); }

/* results */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 0.75rem; margin-top: 1.25rem; }
.stat {
  background: #10121a; border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem 0.5rem; text-align: center; display: flex; flex-direction: column; gap: 0.25rem;
}
.stat-num { font-size: 1.7rem; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.stat-label { font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }

.weak-key { display: flex; align-items: center; gap: 0.75rem; margin: 0.4rem 0; font-size: 0.85rem; color: var(--muted); }
.weak-key kbd { min-width: 2em; text-align: center; font-size: 1rem; color: var(--text); }
.weak-bar { flex: 1; max-width: 260px; height: 8px; background: #23273a; border-radius: 4px; overflow: hidden; }
.weak-bar div { height: 100%; background: var(--bad); border-radius: 4px; }

.key-trend { width: 72px; height: 20px; flex-shrink: 0; }
.key-trend polyline { fill: none; stroke: var(--accent); stroke-width: 1.5; }
.key-trend circle { fill: var(--accent); }

.weak-words { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.weak-word {
  background: #10121a; border: 1px solid var(--border); border-radius: 8px;
  padding: 0.3rem 0.6rem; font-family: ui-monospace, monospace; font-size: 0.85rem;
}
.weak-word em { color: var(--bad); font-style: normal; font-size: 0.75rem; }

/* progress chart */
.progress-chart { width: 100%; height: auto; margin-top: 0.25rem; }
.progress-chart .grid { stroke: var(--border); stroke-width: 1; }
.progress-chart .axis { fill: var(--muted); font-size: 10px; text-anchor: end; }
.progress-chart .wpm-line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linejoin: round; }
.progress-chart .acc-line { fill: none; stroke: var(--muted); stroke-width: 1.5; stroke-dasharray: 4 4; opacity: 0.7; }
.progress-chart .wpm-dots circle { fill: var(--accent); }