/* No BS Type Test — stable multi-line prompt + sentences + typed history */

:root {
  --bg: #0f1115;
  --bg-elevated: #171a21;
  --bg-hover: #1e232d;
  --border: #2a3140;
  --text: #e8eaed;
  --text-muted: #8b93a7;
  --text-dim: #5c6578;
  --correct: #7ee787;
  --incorrect: #ff7b72;
  --current: #e8eaed;
  --accent: #79b8ff;
  --accent-strong: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.15);
  --danger-soft: rgba(255, 123, 114, 0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
  --caret: #58a6ff;
  --line-height: 2.15rem;
  --prompt-lines: 3;
  --prompt-font-size: 1.4rem;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.app {
  max-width: 820px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */

.header {
  text-align: center;
  margin-bottom: 2rem;
}

.logo {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

.tagline {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Screens */

.screen {
  flex: 1;
  display: none;
  flex-direction: column;
  justify-content: center;
}

.screen--active,
.screen:not([hidden]) {
  display: flex;
}

.screen[hidden] {
  display: none !important;
}

/* Card */

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 1.5rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.card--results {
  text-align: center;
}

#screen-results {
  justify-content: flex-start;
  overflow-y: auto;
  padding: 0.5rem 0 1.5rem;
}

/* Controls */

.control-group {
  margin-bottom: 1.5rem;
}

.control-group label,
.label-text {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.duration-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.duration-row select {
  flex: 1;
  appearance: none;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
}

.duration-row select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.difficulty-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.hint {
  margin: 0.6rem 0 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.hint--center {
  text-align: center;
  margin-top: 1rem;
}

/* Buttons */

.btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.7rem 1.1rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
  background: var(--bg-hover);
  color: var(--text);
  border-color: var(--border);
}

.btn:hover {
  background: #252b38;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn--primary {
  background: var(--accent-strong);
  color: #0b1220;
  border-color: transparent;
}

.btn--primary:hover {
  background: #79b8ff;
}

.btn--secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn--secondary:hover {
  background: var(--bg-hover);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}

.btn--ghost:hover {
  color: var(--text);
  background: var(--bg-hover);
}

.btn--icon {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  font-size: 1.35rem;
  line-height: 1;
  flex-shrink: 0;
}

.btn--block {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.9rem;
  font-size: 1rem;
}

.btn--difficulty {
  padding: 0.75rem 0.5rem;
  font-size: 0.9rem;
}

.btn--difficulty.is-selected {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

/* Stats bar */

.stats-bar {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-bottom: 1.25rem;
}

.stat {
  text-align: center;
  min-width: 4.5rem;
}

.stat__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.stat__value {
  font-family: var(--mono);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ---------- Prompt (stable) ---------- */

.words-viewport {
  position: relative;
  height: calc(var(--line-height) * var(--prompt-lines));
  overflow: hidden;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1.5rem;
  cursor: text;
  outline: none;
  user-select: none;
  box-shadow: var(--shadow);
  /* Prevent any horizontal shift */
  overflow-x: hidden;
}

.words-viewport:focus,
.words-viewport.is-focused {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow);
}

.words-viewport.is-blurred .words-inner {
  filter: blur(3px);
  opacity: 0.75;
}

.words-inner {
  font-family: var(--mono);
  font-size: var(--prompt-font-size);
  line-height: var(--line-height);
  letter-spacing: 0.01em;
  /* Smooth only when jumping a full line — not per character */
  transition: transform 0.12s ease-out;
  will-change: transform;
  /* Keep left edge fixed; never scroll horizontally */
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
}

@media (prefers-reduced-motion: reduce) {
  .words-inner {
    transition: none;
  }
}

.word {
  display: inline-block; /* stable box for line metrics; no mid-word wrap */
  white-space: nowrap;
  margin-right: 0; /* spaces are real char nodes after each word */
}

.word::after {
  /* trailing space as its own char node is better; no ::after */
  content: none;
}

.char {
  position: relative;
  display: inline;
  color: var(--text-dim);
}

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

.char.incorrect {
  color: var(--incorrect);
  background: var(--danger-soft);
  border-radius: 2px;
}

.char.current {
  color: var(--current);
}

/* Caret sits on current char without shifting layout */
.char.current::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.2em;
  width: 2px;
  height: 1.1em;
  background: var(--caret);
  border-radius: 1px;
  animation: caret-blink 1s step-end infinite;
  pointer-events: none;
}

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

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

.char.space-char {
  /* keep width of a normal space */
}

.char.space-char.incorrect {
  background: var(--danger-soft);
  border-radius: 2px;
  /* show a visible underline for wrong space */
  box-shadow: inset 0 -2px 0 var(--incorrect);
}

/* ---------- Typed so far ---------- */

.typed-panel {
  margin-top: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.typed-panel__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

.typed-panel__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.typed-panel__count {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.typed-so-far {
  font-family: var(--mono);
  font-size: 0.95rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
  padding: 0.85rem 1rem;
  min-height: 4.5rem;
  max-height: 7.5rem;
  overflow-y: auto;
  overflow-x: hidden;
  word-break: break-word;
  color: var(--text-dim);
}

.typed-so-far:empty::before {
  content: "Your keystrokes will appear here…";
  color: var(--text-dim);
  font-style: italic;
  font-family: var(--font);
  font-size: 0.9rem;
}

.typed-so-far .t {
  color: var(--correct);
}

.typed-so-far .t.is-wrong {
  color: var(--incorrect);
  background: var(--danger-soft);
  border-radius: 2px;
  text-decoration: underline;
  text-decoration-color: rgba(255, 123, 114, 0.5);
}

.typed-so-far .t.is-space.is-wrong {
  box-shadow: inset 0 -2px 0 var(--incorrect);
  text-decoration: none;
  padding: 0 0.1em;
}

.test-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.hidden-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  height: 0;
  width: 0;
  border: 0;
  padding: 0;
}

/* Results */

.results-meta {
  margin: -0.75rem 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.result-stat {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 0.75rem;
}

.result-stat--hero {
  grid-column: 1 / -1;
  padding: 1.5rem;
  background: var(--accent-soft);
  border-color: rgba(88, 166, 255, 0.35);
}

.result-stat__value {
  display: block;
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.result-stat--hero .result-stat__value {
  font-size: 3rem;
  color: var(--accent);
}

.result-stat__label {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.results-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.results-actions .btn {
  min-width: 8.5rem;
}

/* ---------- Progress tracker ---------- */

.tracker {
  margin: 0 0 1.75rem;
  padding: 1.15rem 1.15rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: left;
}

.tracker__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.tracker__title {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.btn--tiny {
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.tracker__summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}

.tracker-stat {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.5rem;
  text-align: center;
}

.tracker-stat--best {
  border-color: rgba(126, 231, 135, 0.35);
  background: rgba(126, 231, 135, 0.08);
}

.tracker-stat__value {
  display: block;
  font-family: var(--mono);
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}

.tracker-stat--best .tracker-stat__value {
  color: var(--correct);
}

.tracker-stat__label {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.tracker-chart {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0.35rem 0.5rem;
  min-height: 11.5rem;
}

.tracker-chart__y {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0.15rem 0 1.55rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  text-align: right;
  user-select: none;
}

.tracker-chart__y [data-tier="pro"] { color: #9eeaf9; }
.tracker-chart__y [data-tier="fast"] { color: #79b8ff; }
.tracker-chart__y [data-tier="fluent"] { color: #7ee787; }
.tracker-chart__y [data-tier="average"] { color: #e3b341; }
.tracker-chart__y [data-tier="slow"] { color: #8b93a7; }

.tracker-chart__plot {
  position: relative;
  min-height: 11.5rem;
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.15rem 0.35rem 0;
}

.tracker-chart__grid {
  position: absolute;
  inset: 0.15rem 0.35rem 1.55rem 0;
  pointer-events: none;
}

.tracker-chart__line {
  position: absolute;
  left: 0;
  right: 0;
  /* Scale: 0–100 WPM maps to full height of grid */
  bottom: calc(var(--tier) * 1%);
  border-top: 1px dashed rgba(139, 147, 167, 0.35);
}

.tracker-chart__bars {
  position: absolute;
  inset: 0.15rem 0.15rem 0 0.1rem;
  display: flex;
  align-items: stretch;
  justify-content: space-around;
  gap: 0.4rem;
}

.tracker-bar {
  flex: 1 1 0;
  max-width: 3.1rem;
  min-width: 1.35rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 0;
  height: 100%;
}

.tracker-bar__body {
  position: relative;
  flex: 1 1 auto;
  width: 100%;
  min-height: 0;
}

.tracker-bar__meta {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.08rem;
  pointer-events: none;
  z-index: 1;
  /* bottom set inline just above the fill */
}

.tracker-bar__value {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.55);
}

.tracker-bar__crown {
  display: block;
  font-size: 0.85rem;
  line-height: 1;
  color: #e3b341;
  filter: drop-shadow(0 0 4px rgba(227, 179, 65, 0.45));
}

.tracker-bar__fill {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 8px 8px 4px 4px;
  background: linear-gradient(180deg, #7ee787 0%, #3fb950 100%);
  border: 1px solid rgba(126, 231, 135, 0.45);
  box-shadow: 0 0 12px rgba(63, 185, 80, 0.15);
  min-height: 4px;
  /* height set inline as % of .tracker-bar__body */
  transition: height 0.35s ease-out;
}

.tracker-bar.is-latest .tracker-bar__fill {
  background: linear-gradient(180deg, #79b8ff 0%, #58a6ff 100%);
  border-color: rgba(88, 166, 255, 0.5);
  box-shadow: 0 0 12px rgba(88, 166, 255, 0.2);
}

.tracker-bar.is-best .tracker-bar__fill {
  background: linear-gradient(180deg, #ffe08a 0%, #e3b341 100%);
  border-color: rgba(227, 179, 65, 0.55);
  box-shadow: 0 0 14px rgba(227, 179, 65, 0.25);
}

.tracker-bar.is-best.is-latest .tracker-bar__fill {
  background: linear-gradient(180deg, #ffe08a 0%, #e3b341 55%, #58a6ff 100%);
}

.tracker-bar__time {
  flex: 0 0 1.45rem;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--text-dim);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  padding-top: 0.25rem;
  line-height: 1.1;
}

.tracker__empty {
  margin: 0.5rem 0 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Responsive */

@media (max-width: 560px) {
  .difficulty-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-bar {
    gap: 1.25rem;
  }

  .stat__value {
    font-size: 1.35rem;
  }

  :root {
    --prompt-font-size: 1.15rem;
    --line-height: 1.95rem;
  }

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

  .result-stat--hero {
    grid-column: 1 / -1;
  }

  .result-stat--hero .result-stat__value {
    font-size: 2.4rem;
  }

  .tracker-chart {
    grid-template-columns: 2.6rem 1fr;
  }

  .tracker-stat__value {
    font-size: 1.25rem;
  }

  .tracker-bar__value {
    font-size: 0.68rem;
  }

  .tracker-bar__time {
    font-size: 0.55rem;
  }
}