:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --ink: #000000;
  --ink-soft: #3d3d3d;
  --ink-faint: #8d8d8d;
  --accent: #0066ff;
  --error: #ff0000;
  --border: #99b3dc;
  --mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* topbar */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 40px 0;
  flex-wrap: wrap;
  gap: 16px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.5px;
}

.logo::before {
  content: "> ";
  color: var(--accent);
}

.option-group {
  display: flex;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px;
}

.option {
  font-family: var(--mono);
  font-size: 13px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
}

.option:hover {
  color: var(--ink);
}

.option.active {
  background: var(--ink);
  color: var(--bg);
}

/* main */

main {
  flex: 1;
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
  padding: 40px 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stats-row {
  display: flex;
  gap: 48px;
  margin-bottom: 36px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 6px;
  text-transform: lowercase;
}

/* typing area */

.type-area {
  position: relative;
  width: 100%;
  outline: none;
}

.text-display {
  font-size: 24px;
  line-height: 1.9;
  color: var(--ink-faint);
  letter-spacing: 0.3px;
  user-select: none;
  filter: blur(0);
  transition: filter 0.15s ease;
}

.type-area:not(:focus-within) .text-display {
  filter: blur(3px);
}

.type-area:not(:focus-within) .click-hint {
  opacity: 1;
  pointer-events: auto;
}

.click-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--ink-soft);
  background: rgba(243, 247, 250, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.text-display .char {
  position: relative;
}

.char.correct {
  color: var(--ink);
}

.char.incorrect {
  color: var(--error);
  text-decoration: underline;
  text-decoration-color: var(--error);
}

.char.current::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 2px;
  bottom: 2px;
  width: 2px;
  background: var(--accent);
  animation: blink 1s step-end infinite;
}

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

#hidden-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 1px;
  height: 1px;
}

/* actions */

.actions {
  margin-top: 32px;
}

.btn {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--surface);
  color: var(--ink-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
}

.btn:hover {
  color: var(--ink);
  border-color: var(--ink-faint);
}

.btn-primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
  margin-top: 8px;
}

.btn-primary:hover {
  color: var(--bg);
  opacity: 0.85;
}

kbd {
  font-family: var(--mono);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 12px;
}

/* results */

.results {
  width: 100%;
  margin-top: 40px;
  text-align: center;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.results h2, .best-scores h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--ink-soft);
  font-weight: 600;
  margin: 0 0 20px;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.result-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}

.result-label {
  font-size: 11px;
  color: var(--ink-soft);
}

/* personal bests */

.best-scores {
  width: 100%;
  margin-top: 48px;
  text-align: center;
}

.best-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.best-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 8px;
}

.best-card .best-time {
  font-size: 12px;
  color: var(--ink-soft);
  display: block;
  margin-bottom: 6px;
}

.best-card .best-wpm {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.best-card .best-wpm::after {
  content: " wpm";
  font-size: 11px;
  font-weight: 400;
  color: var(--ink-soft);
}

/* footer */

footer {
  text-align: center;
  padding: 20px;
  font-size: 12px;
  color: var(--ink-faint);
}

/* responsive */

@media (max-width: 600px) {
  .topbar {
    padding: 20px 20px 0;
  }

  .stats-row {
    gap: 28px;
  }

  .text-display {
    font-size: 19px;
    line-height: 1.8;
  }

  .results-grid, .best-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* accessibility */

@media (prefers-reduced-motion: reduce) {
  .char.current::before {
    animation: none;
  }
}

.type-area:focus-visible,
.btn:focus-visible,
.option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}