/* ── reset ─────────────────────────────────────────────────────────── */

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

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--sub);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  transition: background 180ms ease, color 180ms ease;
}

h1, h2, h3, p, dl, dd, figure { margin: 0; }
ol, ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; }

kbd {
  font-family: inherit;
  font-size: 0.85em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05em 0.4em;
  color: var(--sub);
}

code {
  font-family: var(--mono);
  background: var(--surface-2);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

:root {
  --mono: ui-monospace, 'SF Mono', 'Cascadia Mono', 'Roboto Mono', Menlo,
          Consolas, 'DejaVu Sans Mono', monospace;
  --wrap: 1100px;
  --radius: 10px;
  --type-size: 1.75rem;
}

:focus-visible {
  outline: 2px solid var(--main);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--main);
  color: var(--bg);
  padding: 0.6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ── top bar ───────────────────────────────────────────────────────── */

.topbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: min(100% - 2rem, var(--wrap));
  margin: 0 auto;
  padding: 1.25rem 0 0.5rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--main);
}
.brand-mark { font-size: 1.6rem; line-height: 1; }
.brand-name { color: var(--sub); font-size: 1.05rem; letter-spacing: -0.01em; }
.brand-name b { color: var(--text); font-weight: 600; }

.nav {
  display: flex;
  gap: 1.15rem;
  margin-right: auto;
  flex-wrap: wrap;
}
.nav a {
  color: var(--sub);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
  transition: color 120ms ease, border-color 120ms ease;
}
.nav a:hover { color: var(--text); }
.nav a.is-active { color: var(--main); border-bottom-color: var(--main); }

.topbar-tools { display: flex; gap: 0.5rem; }

.chip {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  cursor: pointer;
  color: var(--sub);
  font-size: 0.85rem;
  transition: color 120ms ease, background 120ms ease;
}
.chip:hover { color: var(--text); background: var(--surface); }

/* ── views ─────────────────────────────────────────────────────────── */

main {
  width: min(100% - 2rem, var(--wrap));
  margin: 0 auto;
  padding: 1rem 0 4rem;
  flex: 1;
}

.view { display: none; }
.view.is-active { display: block; animation: fade 180ms ease; }

@keyframes fade {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: none; }
}

.view-head { margin-bottom: 1.5rem; }
.view-head h1 {
  color: var(--text);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.view-sub { color: var(--sub); font-size: 0.95rem; margin-top: 0.35rem; }

/* ── config bar ────────────────────────────────────────────────────── */

.config {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 0.45rem 0.7rem;
  margin: 0 auto 3rem;
  width: fit-content;
  max-width: 100%;
  font-size: 0.85rem;
  transition: opacity 200ms ease;
}
.config-group { display: flex; gap: 0.15rem; flex-wrap: wrap; }
.config-sep {
  width: 1px;
  align-self: stretch;
  background: var(--border);
  margin: 0.15rem 0.5rem;
}

.opt {
  background: none;
  border: 0;
  border-radius: 6px;
  padding: 0.3rem 0.65rem;
  cursor: pointer;
  color: var(--sub);
  white-space: nowrap;
  transition: color 120ms ease, background 120ms ease;
}
.opt:hover { color: var(--text); }
.opt.is-on { color: var(--main); }

/* ── first-visit control tour ────────────────────────────────────── */

.control-tour {
  position: fixed;
  z-index: 100;
  width: min(280px, calc(100vw - 16px));
  padding: 1rem;
  border: 1px solid var(--main);
  border-radius: var(--radius);
  background: var(--surface-2);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  color: var(--text);
}
.control-tour[hidden] { display: none; }
.control-tour-count {
  color: var(--main);
  font-family: var(--mono);
  font-size: 0.75rem;
}
.control-tour strong { display: block; margin-top: 0.25rem; }
.control-tour p { margin-top: 0.35rem; color: var(--sub); font-size: 0.9rem; }
.control-tour-actions {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1rem;
}
.control-tour-actions button { padding: 0.45rem 0.8rem; }
.config.tour-active .opt:not(.tour-target) { opacity: 0.35; }
.config .tour-target {
  position: relative;
  z-index: 101;
  background: var(--surface-2);
  outline: 2px solid var(--main);
  outline-offset: 2px;
}
body.tour-open .topbar,
body.tour-open .stage,
body.tour-open .keyboard-host { pointer-events: none; }

/* Fades the chrome away while typing so only the words remain. The on-screen
 * keyboard deliberately stays put — it is the one thing a learner needs most
 * precisely while they are typing. */
.config, .stage-actions, .topbar { transition: opacity 250ms ease; }
body.is-typing .config,
body.is-typing .stage-actions,
body.is-typing .topbar { opacity: 0.12; }
body.is-typing .config:hover,
body.is-typing .topbar:hover { opacity: 1; }
body.is-typing .live { opacity: 1; }

/* ── typing stage ──────────────────────────────────────────────────── */

.stage { position: relative; }

.live {
  color: var(--main);
  font-family: var(--mono);
  display: flex;
  align-items: baseline;
  gap: 1rem;
  min-height: 2.4rem;
  margin-bottom: 0.25rem;
}
.live-primary { font-size: 1.9rem; line-height: 1; }
.live-secondary { font-size: 1rem; color: var(--sub); }

/* Caps Lock silently makes every keystroke wrong, and a beginner has no way to
 * tell why. This stays put even while the rest of the chrome fades out. */
.caps-alert {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--error);
  color: var(--bg);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  /* Its own keyframe: the toast's `rise` carries a translate(-50%) for
   * horizontal centring, which would drag this out of the content column. */
  animation: pop-in 200ms ease;
}
.caps-alert[hidden] { display: none; }

@keyframes pop-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

.typing { position: relative; }

.hidden-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  border: 0;
  padding: 0;
  margin: 0;
  z-index: 2;
  cursor: text;
  /* Keep the caret invisible; we draw our own. */
  caret-color: transparent;
  color: transparent;
  background: transparent;
  font-size: 16px; /* stops iOS zooming in on focus */
}

.words-window {
  position: relative;
  height: calc(var(--type-size) * 1.6 * 3);
  overflow: hidden;
  font-family: var(--mono);
  font-size: var(--type-size);
  line-height: 1.6;
}

.words {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 0 0.6ch;
  will-change: transform;
  transition: transform 180ms ease;
}

.word {
  display: inline-flex;
  border-bottom: 2px solid transparent;
  padding-bottom: 1px;
  white-space: nowrap;
}
.word.has-error { border-bottom-color: var(--error); }

.letter { color: var(--sub); transition: color 60ms ease; }
.letter.is-correct { color: var(--text); }
.letter.is-wrong { color: var(--error); }
.letter.is-extra { color: var(--error-extra); }

/* Blind mode: no per-letter feedback at all. */
body.blind .letter.is-correct,
body.blind .letter.is-wrong,
body.blind .letter.is-extra { color: var(--sub); }
body.blind .word.has-error { border-bottom-color: transparent; }

.caret {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: calc(var(--type-size) * 1.1);
  background: var(--main);
  border-radius: 1px;
  transform: translateY(calc(var(--type-size) * 0.22));
  transition: left 90ms ease, top 90ms ease;
  animation: blink 1s steps(1) infinite;
  pointer-events: none;
}
.caret.is-typing { animation: none; }
[data-caret='block'] .caret { width: 0.6ch; opacity: 0.45; }
[data-caret='underline'] .caret {
  width: 0.6ch;
  height: 2px;
  transform: translateY(calc(var(--type-size) * 1.15));
}
[data-caret='off'] .caret { display: none; }

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

@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; transition: none; }
  .words { transition: none; }
  .view.is-active { animation: none; }
}

.focus-veil {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  color: var(--sub);
  font-size: 0.95rem;
  z-index: 3;
  cursor: pointer;
}
.typing.is-blurred .focus-veil { display: flex; }

.quote-source {
  color: var(--sub);
  font-size: 0.9rem;
  font-style: italic;
  margin-top: 1rem;
  text-align: right;
}

/* ── hardest-words drill ───────────────────────────────────────────── */

.drill {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-top: 2rem;
}
.drill[hidden] { display: none; }

.drill-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
}
.drill-title { color: var(--text); font-size: 1rem; font-weight: 600; }
.drill-sub { color: var(--sub); font-size: 0.85rem; margin-top: 0.2rem; }

.drill-words { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.drill-word {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  background: var(--surface-2);
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 0.3rem 0.6rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text);
}
.drill-word b { font-weight: 400; }
.drill-word .drill-wpm { color: var(--sub); font-size: 0.75rem; }
/* Beat your starting speed on a word and it turns green. */
.drill-word.is-improved {
  border-color: var(--main);
}
.drill-word.is-improved .drill-wpm { color: var(--main); }

.drill-empty {
  color: var(--sub);
  font-size: 0.9rem;
  text-align: center;
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--surface);
  border-radius: var(--radius);
}
.drill-empty[hidden] { display: none; }

.stage-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}
.hint { font-size: 0.82rem; color: var(--sub-alt); }
.hint kbd { color: var(--sub-alt); }

/* ── buttons ───────────────────────────────────────────────────────── */

.ghost-btn, .primary-btn {
  border-radius: 8px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--sub);
  font-size: 0.9rem;
  transition: color 120ms ease, background 120ms ease, border-color 120ms ease;
}
.ghost-btn:hover { color: var(--text); border-color: var(--sub-alt); }
.ghost-btn.danger:hover { color: var(--error); border-color: var(--error); }

.primary-btn {
  background: var(--main);
  border-color: var(--main);
  color: var(--bg);
  font-weight: 600;
}
.primary-btn:hover { filter: brightness(1.08); }
.primary-btn kbd {
  background: color-mix(in srgb, var(--bg) 25%, transparent);
  border-color: transparent;
  color: inherit;
  margin-left: 0.4rem;
}

/* ── results ───────────────────────────────────────────────────────── */

.results { display: grid; gap: 1.75rem; }

.results-head {
  display: flex;
  align-items: flex-end;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.score-label { color: var(--sub); font-size: 0.9rem; }
.score-value {
  color: var(--main);
  font-family: var(--mono);
  font-size: 3.5rem;
  line-height: 1;
}
.results-meta {
  color: var(--sub);
  font-size: 0.9rem;
  margin-left: auto;
  text-align: right;
  font-family: var(--mono);
}

.chart-wrap {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
}
.chart-wrap canvas { display: block; width: 100%; height: auto; }

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1.25rem;
}
.results-grid dt { color: var(--sub); font-size: 0.82rem; }
.results-grid dd {
  color: var(--text);
  font-family: var(--mono);
  font-size: 1.35rem;
  margin-top: 0.15rem;
}
.results-grid dd small { color: var(--sub); font-size: 0.8rem; }

.results-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.results-note { color: var(--main); font-size: 0.9rem; }
.results-prev { color: var(--sub); font-size: 0.9rem; }

/* ── panels, tiles, tables ─────────────────────────────────────────── */

.panel {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.panel h2 {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}
.panel-sub { color: var(--sub); font-size: 0.88rem; margin-bottom: 1rem; }

/* Clickable stat cards: native <details> styled as panels, so they work with
 * the keyboard and no JavaScript. */
details.stat-card > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  user-select: none;
}
details.stat-card > summary::-webkit-details-marker { display: none; }
details.stat-card > summary h2 { margin-bottom: 0; }
details.stat-card > summary::after {
  content: '▸';
  color: var(--sub);
  transition: transform 150ms ease;
}
details.stat-card[open] > summary::after { transform: rotate(90deg); }
details.stat-card[open] > summary { margin-bottom: 0.8rem; }
details.stat-card > summary:hover h2 { color: var(--main); }
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: -0.4rem 0 0.9rem;
}
.history-table tr[data-lesson-id] { cursor: pointer; }
.history-table tr[data-lesson-id]:hover td { color: var(--main); }
.empty-note { color: var(--sub); font-size: 0.9rem; text-align: center; padding: 2rem 0; }

.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}
.tile {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem;
}
.tile-label { color: var(--sub); font-size: 0.8rem; }
.tile-value {
  color: var(--main);
  font-family: var(--mono);
  font-size: 1.9rem;
  line-height: 1.15;
  margin-top: 0.2rem;
}
.tile-sub { color: var(--sub-alt); font-size: 0.78rem; }

.pb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.85rem;
}
.pb {
  background: var(--surface-2);
  border-radius: 8px;
  padding: 0.85rem;
}
.pb-mode { color: var(--sub); font-size: 0.8rem; }
.pb-wpm { color: var(--text); font-family: var(--mono); font-size: 1.5rem; }
.pb-acc { color: var(--sub-alt); font-size: 0.78rem; }

.table-scroll { overflow-x: auto; }
.history-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.88rem;
  white-space: nowrap;
}
.history-table th {
  text-align: left;
  color: var(--sub);
  font-weight: 400;
  font-size: 0.78rem;
  padding: 0.4rem 0.8rem 0.4rem 0;
  border-bottom: 1px solid var(--border);
}
.history-table td {
  padding: 0.45rem 0.8rem 0.45rem 0;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.history-table tr:last-child td { border-bottom: 0; }
.history-table td.dim { color: var(--sub); }

.worst-keys {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.worst-key {
  background: var(--surface-2);
  border: 0;
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text);
  cursor: pointer;
  transition: background 120ms ease;
}
.worst-key:hover {
  background: color-mix(in srgb, var(--main) 20%, var(--surface-2));
}
.worst-key b { color: var(--error); font-weight: 600; }

/* Panel heading with a control on the right (the accuracy/speed switch). */
.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.panel-head h2 { margin-bottom: 0.35rem; }

/* ── lessons ───────────────────────────────────────────────────────── */

.lesson-progress {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.progress-bar {
  flex: 1;
  min-width: 160px;
  height: 8px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--main);
  border-radius: 999px;
  transition: width 300ms ease;
}
.progress-text { color: var(--sub); font-size: 0.88rem; font-family: var(--mono); }

.lesson-list { display: grid; gap: 0.6rem; }

.lesson {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  width: 100%;
  text-align: left;
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease;
}
.lesson:hover:not(:disabled) { border-color: var(--sub-alt); transform: translateX(2px); }
.lesson:disabled { cursor: not-allowed; opacity: 0.45; }

.lesson-num {
  font-family: var(--mono);
  color: var(--sub-alt);
  font-size: 0.9rem;
  min-width: 2ch;
}
.lesson-body { flex: 1; min-width: 0; }
.lesson-title { display: block; color: var(--text); font-size: 0.98rem; }
.lesson-desc {
  display: block;
  color: var(--sub);
  font-size: 0.82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lesson-target { color: var(--sub-alt); font-size: 0.78rem; font-family: var(--mono); }
.lesson-stars { color: var(--sub-alt); font-size: 0.95rem; letter-spacing: 0.1em; }
.lesson-stars .earned { color: var(--main); }
.lesson.is-locked .lesson-title { color: var(--sub); }

/* ── settings ──────────────────────────────────────────────────────── */

.settings-grid { display: grid; gap: 1.25rem; margin-bottom: 1.25rem; }

.setting {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}
.setting-head { margin-bottom: 0.7rem; }
.setting-name { color: var(--text); font-size: 0.98rem; }
.setting-desc { color: var(--sub); font-size: 0.85rem; }
.setting-options { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.seg {
  background: var(--surface-2);
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  color: var(--sub);
  font-size: 0.86rem;
  transition: color 120ms ease, border-color 120ms ease;
}
.seg:hover { color: var(--text); }
.seg.is-on { color: var(--main); border-color: var(--main); }

.settings-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.storage-warning { color: var(--error); font-size: 0.86rem; margin-top: 0.85rem; }

/* ── toast ─────────────────────────────────────────────────────────── */

.toast {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  z-index: 50;
  animation: rise 200ms ease;
}
@keyframes rise {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ── responsive ────────────────────────────────────────────────────── */

@media (max-width: 700px) {
  :root { --type-size: 1.35rem; }
  .topbar { gap: 0.75rem 1rem; padding-top: 1rem; }
  .nav { order: 3; width: 100%; justify-content: space-between; }
  .score-value { font-size: 2.5rem; }
  .results-head { gap: 1.5rem; }
  .results-meta { margin-left: 0; text-align: left; width: 100%; }
  .hint { display: none; }
}

@media (max-width: 420px) {
  :root { --type-size: 1.15rem; }
}

/* ── site footer ───────────────────────────────────────────────────── */

.sitefoot {
  width: min(100% - 2rem, var(--wrap));
  margin: 0 auto;
  padding: 1rem 0 1.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}

.sitefoot-line {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  color: var(--sub-alt);
}

.sitefoot a {
  color: var(--sub);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms ease, border-color 120ms ease;
}
.sitefoot a:hover { color: var(--main); border-bottom-color: var(--main); }

.sitefoot-gh {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.sitefoot-gh svg { display: block; }