:root {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #273449;
  --border: rgba(148, 163, 184, 0.16);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --faint: #475569;
  --accent: #06b6d4;
  --accent-strong: #22d3ee;
  --accent-soft: rgba(6, 182, 212, 0.14);
  --error: #f87171;
  --error-soft: rgba(248, 113, 113, 0.6);
  --chart-fill: rgba(6, 182, 212, 0.28);
  --chart-fill-end: rgba(6, 182, 212, 0);
  --chart-raw: #64748b;
  --chart-grid: rgba(148, 163, 184, 0.14);
  --radius: 12px;
  --radius-inner: 9px;
  --shadow: 0 12px 32px rgba(2, 6, 23, 0.45), 0 2px 6px rgba(2, 6, 23, 0.3);
  --speed: 200ms;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--bg);
  background-image: radial-gradient(ellipse 900px 380px at 50% -140px, rgba(6, 182, 212, 0.12), transparent 70%);
  background-repeat: no-repeat;
  color: var(--text);
  font: 16px/1.5 var(--font);
}

[hidden] {
  display: none !important;
}

button {
  color: inherit;
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.app {
  display: flex;
  flex-direction: column;
  max-width: 960px;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 0 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand__icon {
  flex: none;
  width: 34px;
  height: 34px;
}

.brand__frame {
  fill: var(--accent-soft);
  stroke: rgba(6, 182, 212, 0.45);
  stroke-width: 2;
}

.brand__typed {
  fill: var(--accent);
}

.brand__caret {
  fill: var(--accent-strong);
}

.brand__rest {
  fill: var(--faint);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  touch-action: manipulation;
  transition: color var(--speed) ease, border-color var(--speed) ease, transform var(--speed) ease;
}

.btn:hover {
  border-color: rgba(6, 182, 212, 0.6);
  color: var(--accent-strong);
}

.btn:active {
  transform: translateY(1px);
}

.btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.lang-toggle {
  min-width: 52px;
  padding: 0 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

/* Layout */

.main {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 20px;
  padding: 12px 0 24px;
}

/* Settings */

.config {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.seg {
  display: inline-flex;
  gap: 2px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 4px 14px rgba(2, 6, 23, 0.25);
}

.seg__btn {
  min-width: 44px;
  min-height: 40px;
  padding: 0 14px;
  border: 0;
  border-radius: var(--radius-inner);
  background: transparent;
  color: var(--muted);
  font-size: 0.95rem;
  cursor: pointer;
  touch-action: manipulation;
  transition: color var(--speed) ease, background-color var(--speed) ease;
}

.seg__btn:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.seg__btn[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 600;
}

/* Test */

.test {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.status {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  min-height: 40px;
  padding: 0 4px;
}

.status__counter {
  min-width: 2ch;
  color: var(--accent);
  font: 700 1.875rem/1.2 var(--mono);
  font-variant-numeric: tabular-nums;
}

.status__live {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.status__best {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.875rem;
}

.board {
  position: relative;
  padding: 26px 28px 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  touch-action: none;
  transition: border-color var(--speed) ease;
}

.board:focus-within {
  border-color: rgba(6, 182, 212, 0.35);
}

.progress {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: rgba(148, 163, 184, 0.1);
}

.progress__bar {
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}

.words {
  --lh: 44px;
  position: relative;
  height: calc(var(--lh) * 3);
  overflow: hidden;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 26px;
  line-height: var(--lh);
  transition: filter var(--speed) ease, opacity var(--speed) ease;
}

.words__track {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  column-gap: 0.6em;
  transition: transform var(--speed) ease;
}

.word {
  height: var(--lh);
  white-space: nowrap;
}

.word.is-error {
  text-decoration: underline 2px var(--error-soft);
  text-underline-offset: 8px;
}

.ch.is-correct {
  color: var(--text);
}

.ch.is-incorrect {
  color: var(--error);
}

.ch.is-extra {
  color: var(--error);
  opacity: 0.6;
}

.caret {
  position: absolute;
  top: calc((var(--lh) - 1.15em) / 2);
  left: -1px;
  width: 2px;
  height: 1.15em;
  border-radius: 1px;
  background: var(--accent-strong);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.55);
  transition: transform 150ms ease-out, opacity var(--speed) ease;
}

.board.is-ready .caret {
  animation: blink 1.1s ease-in-out infinite;
}

.board.is-blurred .caret {
  opacity: 0;
}

.board.is-blurred .words {
  filter: blur(5px);
  opacity: 0.4;
}

/* The real input sits invisibly over the words: a tap on the words focuses it and opens the on-screen keyboard. */
.field {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  font-size: 16px;
  opacity: 0;
  cursor: default;
}

.board__focus {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 16px;
  color: var(--text);
  font-weight: 600;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--speed) ease;
}

.board.is-blurred .board__focus {
  opacity: 1;
}

.note {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
}

/* Results */

.results {
  padding: 24px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  animation: rise 240ms ease-out;
}

.results__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  margin-bottom: 18px;
}

.results__title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
}

.results__type {
  margin: 0;
  color: var(--muted);
}

.results__best {
  margin: 0 0 0 auto;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 600;
}

.results__best.is-new {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.results__grid {
  display: grid;
  grid-template-columns: minmax(140px, max-content) minmax(0, 1fr);
  align-items: center;
  gap: 20px 32px;
}

.big-stats {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 0;
}

.stat {
  margin: 0;
}

.stat dt {
  color: var(--muted);
  font-size: 0.9rem;
}

.stat dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.stat--big dd {
  color: var(--accent);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.chart {
  min-width: 0;
  margin: 0;
}

.chart__box {
  position: relative;
  height: 210px;
}

.chart__box canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px 18px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.8125rem;
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend__line {
  width: 16px;
  height: 3px;
  border-radius: 2px;
}

.legend__item--wpm .legend__line {
  background: var(--accent);
}

.legend__item--raw .legend__line {
  background: var(--chart-raw);
}

.legend__cross {
  width: 10px;
  height: 10px;
  fill: none;
  stroke: var(--error);
  stroke-width: 2;
  stroke-linecap: round;
}

.small-stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px 12px;
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.small-stats dd {
  color: var(--text);
  font-size: 1.375rem;
  font-weight: 600;
  line-height: 1.3;
}

/* Actions and footer */

.actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.btn--restart {
  min-width: 170px;
}

.kbd-hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.8125rem;
}

kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: 600 0.75rem/1.5 var(--mono);
  text-align: center;
}

.footer {
  padding: 8px 0 24px;
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
}

.footer a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 4px;
  border-radius: 6px;
  color: var(--accent-strong);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

/* Touch screens have no Tab key to show. */
@media (hover: none) and (pointer: coarse) {
  .kbd-hint {
    display: none;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding-top: 12px;
  }

  .brand {
    font-size: 1.125rem;
  }

  .main {
    gap: 16px;
  }

  .board {
    padding: 20px 16px 18px;
  }

  .words {
    --lh: 36px;
    font-size: 21px;
  }

  .status__counter {
    font-size: 1.625rem;
  }

  .results {
    padding: 20px 16px;
  }

  .results__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .big-stats {
    flex-direction: row;
    justify-content: space-around;
    text-align: center;
  }

  .stat--big dd {
    font-size: 2.75rem;
  }

  .chart__box {
    height: 170px;
  }

  .legend {
    justify-content: center;
  }

  .small-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    text-align: center;
  }

  .results__best {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}