* { box-sizing: border-box; }

html { font-family: var(--font-ui); background: var(--bg); color: var(--text); }

body { margin: 0; min-height: 100vh; background: var(--bg); }

button, input, select, textarea { font: inherit; }

button { color: inherit; }

button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 34%, transparent);
  outline-offset: 2px;
}

svg { width: 18px; height: 18px; stroke-width: 1.9; }

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent-soft) 36%, transparent) 0, transparent 150px),
    var(--surface);
  border-right: 1px solid var(--separator);
  padding: var(--s5) var(--s3);
  display: flex;
  flex-direction: column;
  gap: var(--s6);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 var(--s2);
  min-height: 48px;
}

.brand-mark {
  position: relative;
  width: 46px;
  height: 38px;
  flex: none;
  display: grid;
  place-items: center;
}

.brand-mark-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-mark-image--dark { display: none; }

.brand-copy { min-width: 0; flex: 1; max-width: 156px; }

.brand-name {
  font-size: 17px;
  line-height: 1.05;
  font-weight: 760;
  letter-spacing: -0.035em;
  white-space: nowrap;
}

.brand-type { color: var(--brand-navy); }
.brand-stride { color: var(--brand-blue); }

.brand-meta {
  margin-top: 4px;
  font-size: 10px;
  line-height: 1.2;
  color: var(--text-3);
  text-transform: none;
  letter-spacing: .04em;
  white-space: normal;
  overflow-wrap: anywhere;
}

.nav-list { display: grid; gap: var(--s1); }

.nav-item, .icon-text-button {
  border: 0;
  background: transparent;
  cursor: pointer;
  border-radius: var(--r-sm);
}

.nav-item {
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: var(--s3);
  padding: 0 var(--s3);
  color: var(--text-2);
  text-align: left;
}

.nav-item:hover { background: var(--surface-hover); color: var(--text); }
.nav-item.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 650; }

.sidebar-footer {
  margin-top: auto;
  padding: var(--s3) var(--s2);
  display: grid;
  gap: 8px;
}

.beta-chip {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, var(--separator));
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.sidebar-note { color: var(--text-3); font-size: 12px; }

.app-column { min-width: 0; }

.topbar {
  min-height: 86px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s4);
  padding: var(--s4) clamp(20px, 5vw, 56px);
  border-bottom: 1px solid var(--separator);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar h1 { margin: 2px 0 0; font-size: 26px; letter-spacing: -0.03em; }
.topbar h1:focus { outline: none; }
.eyebrow { margin: 0; color: var(--text-3); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-selector {
  position: relative;
}

.header-selector-button {
  min-height: 46px;
  border: 1px solid var(--separator);
  border-radius: 11px;
  background: var(--surface);
  color: var(--text);
  padding: 6px 9px 6px 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  min-width: 112px;
}

.header-selector-button:hover,
.header-selector-button[aria-expanded="true"] {
  background: var(--surface-hover);
  border-color: color-mix(in srgb, var(--accent) 26%, var(--separator));
}

.header-selector-copy {
  display: grid;
  gap: 1px;
  text-align: left;
  min-width: 0;
}

.header-selector-copy small {
  color: var(--text-3);
  font-size: 9px;
  font-weight: 650;
  line-height: 1.1;
  letter-spacing: .035em;
  white-space: nowrap;
}

.header-selector-copy strong {
  color: var(--text);
  font-size: 13px;
  line-height: 1.15;
  white-space: nowrap;
}

.selector-chevron {
  width: 14px;
  height: 14px;
  margin-left: auto;
  color: var(--text-3);
  transition: transform .16s ease;
}

.header-selector-button[aria-expanded="true"] .selector-chevron {
  transform: rotate(180deg);
}

.header-selector-menu {
  position: absolute;
  z-index: 80;
  top: calc(100% + 7px);
  right: 0;
  min-width: 172px;
  padding: 5px;
  border: 1px solid var(--separator);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow-popover);
}

.header-selector-menu[hidden] { display: none; }

.header-option {
  width: 100%;
  min-height: 38px;
  border: 0;
  border-radius: 8px;
  padding: 0 10px;
  background: transparent;
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  text-align: left;
}

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

.header-option.is-selected {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 680;
}

.header-option .lucide-check {
  width: 15px;
  height: 15px;
  opacity: 0;
}

.header-option.is-selected .lucide-check { opacity: 1; }

.icon-text-button {
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--separator);
  background: var(--surface);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.icon-text-button:hover { background: var(--surface-hover); }

main {
  width: min(var(--content), calc(100% - 40px));
  margin: 0 auto;
  padding: var(--s8) 0 var(--s16);
}


.page-intro {
  display: grid;
  gap: 7px;
  padding: 2px 0 4px;
}

.page-intro h2 {
  margin: 0;
  font-size: clamp(25px, 3.1vw, 34px);
  line-height: 1.1;
  letter-spacing: -.035em;
}

.page-intro p {
  margin: 0;
  max-width: 760px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.6;
}

.page-stack { display: grid; gap: var(--s8); }

.hero-block {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr);
  gap: var(--s8);
  align-items: end;
  padding: var(--s4) 0 var(--s4);
}

.hero-block h2 {
  margin: 0;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.hero-block p {
  margin: 14px 0 0;
  max-width: 720px;
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-2);
}

.hero-side {
  border: 1px solid var(--separator);
  border-radius: var(--r-lg);
  padding: var(--s5);
  background: var(--surface);
}

.hero-side-label { color: var(--text-3); font-size: 13px; }
.hero-side-value { margin-top: 6px; font-size: 26px; font-weight: 700; letter-spacing: -.03em; }

.hero-settings-summary { display: grid; gap: 12px; }
.hero-setting-line { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; font-size: 14px; }
.hero-setting-line span { color: var(--text-3); }
.hero-setting-line strong { color: var(--text); font-size: 17px; font-weight: 720; letter-spacing: -.015em; }

.section { display: grid; gap: var(--s4); }

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--s4);
}

.section-header h2, .section-header h3 { margin: 0; letter-spacing: -.025em; }
.section-header p { margin: 4px 0 0; color: var(--text-3); }

.panel {
  background: var(--surface);
  border: 1px solid var(--separator);
  border-radius: var(--r-lg);
  padding: var(--s6);
}

.panel.compact { padding: var(--s5); }

.recommendation {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--s6);
}

.recommendation h3 { margin: 0 0 8px; font-size: 20px; }
.recommendation p { margin: 0; color: var(--text-2); line-height: 1.6; }
.reason { margin-top: 8px !important; color: var(--text-3) !important; font-size: 13px; }

.button-row { display: flex; flex-wrap: wrap; gap: var(--s2); }

.btn {
  min-height: 42px;
  border-radius: 10px;
  padding: 0 15px;
  border: 1px solid transparent;
  cursor: pointer;
  font-weight: 650;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--surface); border-color: var(--separator); }
.btn-secondary:hover { background: var(--surface-hover); }
.btn-ghost { background: transparent; color: var(--text-2); }
.btn-ghost:hover { background: var(--surface-hover); color: var(--text); }
.btn-danger { background: var(--danger); color: white; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--separator);
  background: var(--surface);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.metric {
  min-width: 0;
  padding: var(--s5);
  border-right: 1px solid var(--separator);
}
.metric:last-child { border-right: 0; }
.metric-label { font-size: 12px; color: var(--text-3); font-weight: 650; text-transform: uppercase; letter-spacing: .05em; }
.metric-value { margin-top: 7px; font-size: 28px; font-weight: 700; letter-spacing: -.04em; }
.metric-sub { margin-top: 4px; font-size: 12px; color: var(--text-3); }

.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--s3);
}

.quick-action {
  min-height: 118px;
  padding: var(--s5);
  border: 1px solid var(--separator);
  border-radius: var(--r-md);
  background: var(--surface);
  cursor: pointer;
  text-align: left;
  display: grid;
  align-content: space-between;
  gap: var(--s4);
}

.quick-action:hover { background: var(--surface-hover); }
.quick-action strong { font-size: 17px; }
.quick-action span { color: var(--text-3); font-size: 13px; line-height: 1.5; }

.list { border: 1px solid var(--separator); border-radius: var(--r-lg); overflow: hidden; background: var(--surface); }
.list-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--s4);
  padding: var(--s4) var(--s5);
  border-bottom: 1px solid var(--separator);
  align-items: center;
}
.list-row:last-child { border-bottom: 0; }
.list-row h4 { margin: 0; font-size: 15px; }
.list-row p { margin: 4px 0 0; font-size: 13px; color: var(--text-3); }
.list-meta { color: var(--text-2); font-variant-numeric: tabular-nums; }

.form-grid { display: grid; gap: var(--s5); }
.field { display: grid; gap: 8px; }
.field label, .field legend { font-weight: 650; font-size: 14px; }
.field small { color: var(--text-3); line-height: 1.5; }

select, input[type="text"], input[type="number"] {
  min-height: 44px;
  border: 1px solid var(--separator-strong);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  padding: 0 12px;
}

.segmented {
  display: inline-grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  padding: 3px;
  border-radius: 11px;
  background: var(--surface-2);
  border: 1px solid var(--separator);
  width: fit-content;
  max-width: 100%;
}

.segmented button {
  min-height: 36px;
  border: 0;
  border-radius: 8px;
  padding: 0 13px;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
}

.segmented button.is-selected {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
  font-weight: 650;
}

.toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s6);
  padding: 14px 0;
  border-bottom: 1px solid var(--separator);
}
.toggle-row:last-child { border-bottom: 0; }
.toggle-copy strong { display: block; }
.toggle-copy span { color: var(--text-3); font-size: 13px; display: block; margin-top: 4px; }

.switch {
  position: relative;
  width: 46px;
  height: 28px;
  flex: none;
}
.switch input { opacity: 0; position: absolute; }
.switch span {
  position: absolute; inset: 0;
  border-radius: 999px;
  background: var(--separator-strong);
  cursor: pointer;
  transition: background .18s ease;
}
.switch span::after {
  content: "";
  position: absolute;
  width: 22px; height: 22px;
  left: 3px; top: 3px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 1px 4px rgba(0,0,0,.22);
  transition: transform .18s ease;
}
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::after { transform: translateX(18px); }

.notice {
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--separator);
  color: var(--text-2);
  line-height: 1.6;
  font-size: 14px;
}
.notice.warning { background: var(--warning-soft); }
.notice.success { background: var(--success-soft); }

.session-layer {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 100;
  overflow: auto;
}

.session-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.session-toolbar {
  position: sticky;
  top: 0;
  z-index: 120;
  min-height: 68px;
  border-bottom: 1px solid var(--separator);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 clamp(16px, 4vw, 42px);
  gap: var(--s4);
  background: var(--surface);
}

.session-toolbar-center {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 18px;
}

.session-toolbar-right { justify-self: end; display: flex; gap: 8px; }

.session-body {
  flex: 1;
  width: min(980px, calc(100% - 40px));
  height: calc(100vh - 68px);
  margin: 0 auto;
  padding: 20px 0 18px;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 14px;
  overflow: hidden;
}

.session-kicker {
  text-align: center;
  color: var(--text-3);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.typing-wrap {
  max-width: 820px;
  margin: 0 auto;
  width: 100%;
  min-height: 0;
  position: relative;
  overflow-y: auto;
  padding: 6px 10px 18px;
  scroll-behavior: smooth;
}

.typing-text {
  font-size: clamp(23px, 2.7vw, 31px);
  line-height: 1.8;
  letter-spacing: .006em;
  user-select: none;
  overflow-wrap: break-word;
}

.typing-text.is-sentence-focus,
.typing-text.is-paragraph-focus,
.typing-text.is-word-focus {
  min-height: 100%;
  display: grid;
  align-content: center;
}

.focus-sentence,
.focus-paragraph,
.focus-word {
  animation: focus-enter 220ms ease-out;
}

.typing-text.is-word-focus {
  text-align: center;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.35;
  letter-spacing: .015em;
}

@keyframes focus-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.paragraph-break {
  display: block;
  height: 1.05em;
}


.char { color: color-mix(in srgb, var(--text) 54%, var(--bg)); border-radius: 3px; }
.char.correct { color: var(--text); }
.char.current {
  color: var(--text);
  text-decoration: underline 2px var(--accent);
  text-underline-offset: 5px;
}

.char.current[data-space="true"] {
  text-decoration: none;
}
.char.incorrect {
  color: var(--danger);
  background: var(--danger-soft);
  text-decoration: underline 2px var(--danger);
  text-underline-offset: 4px;
}

.typing-capture {
  /* Keep the native IME caret in the viewport, not after a long passage. */
  position: fixed;
  top: 80px;
  left: 24px;
  width: 1px; height: 1px;
  padding: 0; margin: 0; border: 0;
  font-size: 16px;
  resize: none;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.live-metrics {
  display: flex;
  justify-content: center;
  gap: var(--s8);
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
}

.live-metric strong { color: var(--text); font-size: 19px; margin-right: 5px; }

.session-assist {
  position: sticky;
  bottom: 0;
  z-index: 110;
  background: color-mix(in srgb, var(--bg) 96%, transparent);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--separator);
  padding: 12px 0 4px;
  display: grid;
  gap: 10px;
}

.visual-keyboard {
  width: min(760px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 5px;
  opacity: .96;
}

.visual-keyboard.is-staggered .key-row[data-row="1"] { transform: translateX(10px); }
.visual-keyboard.is-staggered .key-row[data-row="2"] { transform: translateX(22px); }
.visual-keyboard.is-staggered .key-row[data-row="3"] { transform: translateX(34px); }

.key.home-key {
  position: relative;
}

.key.home-key::after {
  content: "";
  position: absolute;
  bottom: 5px;
  left: 50%;
  width: 11px;
  height: 2px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: var(--text-3);
}

.key-row { display: flex; justify-content: center; gap: 6px; }
.key {
  min-width: 38px;
  height: 36px;
  padding: 0 8px;
  border: 1px solid var(--separator);
  background: var(--surface);
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 12px;
  color: var(--text-2);
}
.key.wide { min-width: 74px; }
.key.space { width: 260px; }
.key.target {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 700;
}

.session-hint {
  text-align: center;
  color: var(--text-3);
  font-size: 13px;
}

.result-shell { width: min(860px, calc(100% - 40px)); margin: 0 auto; padding: 54px 0 80px; }
.result-title { text-align: center; margin-bottom: var(--s8); }
.result-title h2 { font-size: 34px; margin: 0; letter-spacing: -.04em; }
.result-title p { color: var(--text-3); margin: 8px 0 0; }

.result-main {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--separator);
  background: var(--surface);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.result-main .metric { text-align: center; }

.fingerprint {
  display: grid;
  gap: var(--s3);
}
.fingerprint-row {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: var(--s3);
  align-items: center;
}
.bar {
  height: 8px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}
.bar > span { display: block; height: 100%; background: var(--text-2); border-radius: inherit; }

.analysis-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s4);
}

.table-wrap { overflow-x: auto; border: 1px solid var(--separator); border-radius: var(--r-lg); background: var(--surface); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--separator); }
th { color: var(--text-3); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }
td { font-size: 14px; }
tr:last-child td { border-bottom: 0; }

.empty-state { padding: 48px 24px; text-align: center; color: var(--text-3); }


.result-section-header {
  align-items: flex-start;
  gap: var(--s4);
}

.mistyped-keys {
  display: grid;
  gap: 10px;
}

.mistyped-key-row {
  display: grid;
  grid-template-columns: minmax(170px, 1.1fr) minmax(120px, 2fr) 92px 64px;
  gap: var(--s3);
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--separator);
}

.mistyped-key-row:last-child { border-bottom: 0; }

.mistyped-key-name {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.mistyped-key-name kbd {
  min-width: 38px;
  padding: 6px 8px;
  border: 1px solid var(--separator-strong, var(--separator));
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--text-1);
  font: inherit;
  font-weight: 760;
  text-align: center;
  box-shadow: inset 0 -1px 0 color-mix(in srgb, var(--text-1) 12%, transparent);
}

.mistyped-key-name span,
.mistyped-key-count span,
.result-footnote,
.result-material-progress span {
  color: var(--text-3);
  font-size: 12px;
}

.mistyped-key-count {
  display: grid;
  justify-items: end;
  line-height: 1.1;
}

.mistyped-key-count strong {
  font-size: 18px;
  color: var(--danger);
}

.mistyped-key-accuracy {
  text-align: right;
  color: var(--text-2);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.mistyped-key-row .bar > span { background: var(--danger); }

.result-footnote { margin: 12px 0 0; }

.result-material-progress {
  display: grid;
  justify-items: end;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}

.result-material-progress strong {
  font-size: 18px;
  color: var(--text-1);
}

.result-vocabulary-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 260px;
  overflow: auto;
  padding-right: 4px;
}

.result-vocabulary-item {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 10px;
  border: 1px solid var(--separator);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--text-1);
  font-size: 14px;
  line-height: 1.2;
}

.result-material-details {
  border: 1px solid var(--separator);
  border-radius: var(--r-md);
  background: var(--surface-2);
  overflow: hidden;
}

.result-material-details summary {
  cursor: pointer;
  padding: 12px 14px;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 700;
  user-select: none;
}

.result-material-text {
  max-height: 320px;
  overflow: auto;
  padding: 16px;
  border-top: 1px solid var(--separator);
  background: var(--surface);
  color: var(--text-1);
  font-size: 15px;
  line-height: 1.8;
  white-space: pre-wrap;
}

.result-material-meter {
  height: 4px;
  margin-top: 14px;
  background: var(--surface-2);
  overflow: hidden;
}

.result-material-meter > span {
  display: block;
  height: 100%;
  background: var(--accent);
}

@media (max-width: 900px) {
  .app-shell { grid-template-columns: 76px minmax(0, 1fr); }
  .sidebar { padding-inline: 10px; }
  .brand { justify-content: center; }
  .brand-copy, .nav-item span, .sidebar-note { display: none; }
  .nav-item { justify-content: center; padding: 0; }
  .sidebar-footer { justify-items: center; }
  .hero-block { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(-n+2) { border-bottom: 1px solid var(--separator); }
  .quick-grid { grid-template-columns: 1fr 1fr; }
  .analysis-two { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .app-shell { display: block; }
  .sidebar {
    position: fixed;
    left: 0; right: 0; bottom: 0; top: auto;
    z-index: 50;
    width: auto; height: 64px;
    border-right: 0; border-top: 1px solid var(--separator);
    padding: 6px 8px;
  }
  .brand, .sidebar-footer { display: none; }
  .nav-list { grid-template-columns: repeat(4, 1fr); gap: 2px; }
  .nav-item { min-height: 50px; }
  .nav-item span { display: none; }
  .topbar { min-height: 72px; padding: 12px 16px; }
  .topbar h1 { font-size: 21px; }
  main { width: min(100% - 28px, var(--content)); padding-bottom: 96px; }
  .hero-block { padding-top: 18px; }
  .hero-block h2 { font-size: 36px; }
  .hero-block p { font-size: 16px; }
  .metric-grid, .quick-grid, .result-main { grid-template-columns: 1fr; }
  .metric { border-right: 0; border-bottom: 1px solid var(--separator); }
  .metric:last-child { border-bottom: 0; }
  .recommendation { grid-template-columns: 1fr; }
  .session-toolbar { grid-template-columns: 1fr auto; }
  .session-toolbar-center { display: none; }
  .session-toolbar-right { grid-column: 2; }
  .live-metrics { gap: 16px; flex-wrap: wrap; }
  .visual-keyboard { display: none; }
  .fingerprint-row { grid-template-columns: 120px 1fr auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}


.conditional-field[hidden] { display: none !important; }

.practice-type-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s3);
}

.choice-card {
  border: 1px solid var(--separator);
  background: var(--surface);
  border-radius: var(--r-md);
  padding: var(--s5);
  cursor: pointer;
  text-align: left;
  display: grid;
  gap: 7px;
}
.choice-card:hover { background: var(--surface-hover); }
.choice-card.is-selected {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
  background: var(--accent-soft);
}
.choice-card strong { font-size: 17px; }
.choice-card span { color: var(--text-3); font-size: 13px; line-height: 1.5; }

.session-meta-note {
  text-align: center;
  color: var(--text-3);
  font-size: 12px;
}

@media (max-height: 760px) and (min-width: 641px) {
  .session-body { padding-top: 12px; gap: 9px; }
  .session-kicker { font-size: 11px; }
  .visual-keyboard { gap: 4px; }
  .key-row { gap: 4px; }
  .key { height: 31px; min-width: 34px; font-size: 11px; }
  .key.wide { min-width: 64px; }
  .key.space { width: 230px; }
  .session-assist { padding-top: 8px; gap: 7px; }
  .typing-text { font-size: clamp(21px, 2.3vw, 27px); line-height: 1.65; }
}


/* TypeStride brand integration */

.btn-primary {
  box-shadow: 0 7px 20px color-mix(in srgb, var(--brand-blue) 18%, transparent);
}

:root[data-theme="dark"] .brand-mark-image--light { display: none; }
:root[data-theme="dark"] .brand-mark-image--dark { display: block; }
:root[data-theme="dark"] .brand-type { color: #f5f8fc; }

@media (prefers-color-scheme: dark) {
  :root[data-theme="system"] .brand-mark-image--light { display: none; }
  :root[data-theme="system"] .brand-mark-image--dark { display: block; }
  :root[data-theme="system"] .brand-type { color: #f5f8fc; }
}

.brand-lockup-preview {
  width: min(560px, 100%);
  height: auto;
  display: block;
}

.brand-lockup-preview--dark { display: none; }

:root[data-theme="dark"] .brand-lockup-preview--light { display: none; }
:root[data-theme="dark"] .brand-lockup-preview--dark { display: block; }

@media (prefers-color-scheme: dark) {
  :root[data-theme="system"] .brand-lockup-preview--light { display: none; }
  :root[data-theme="system"] .brand-lockup-preview--dark { display: block; }
}


/* β 0.1.5 interaction refinements */
.fingerprint-row.is-major { margin: 2px -10px; padding: 12px 10px; border-radius: 12px; background: var(--danger-soft); }
.fingerprint-name { min-width: 0; }
.fingerprint-row.is-major .fingerprint-name { color: var(--danger); font-weight: 780; font-size: 16px; }
.major-error-badge { display: block; margin-top: 3px; color: var(--danger); font-size: 10px; font-weight: 760; letter-spacing: .08em; text-transform: uppercase; }
.fingerprint-row.is-major .bar { height: 12px; background: color-mix(in srgb, var(--danger) 13%, var(--surface)); }
.fingerprint-row.is-major .bar > span { background: var(--danger); }
.fingerprint-row.is-major .fingerprint-count { color: var(--danger); font-size: 20px; font-weight: 820; }

.result-primary-actions { display: flex; flex-wrap: wrap; gap: var(--s2); margin-top: 20px; }
.result-navigation-actions { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3); margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--separator); }
.btn-navigation { min-height: 58px; justify-content: flex-start; text-align: left; padding: 10px 14px; border: 1px solid var(--separator); background: var(--surface-2); }
.btn-navigation:hover { border-color: color-mix(in srgb, var(--accent) 36%, var(--separator)); background: var(--accent-soft); }
.btn-navigation svg { color: var(--accent); flex: none; }
.btn-navigation span { display: grid; gap: 2px; }
.btn-navigation strong { color: var(--text); font-size: 14px; }
.btn-navigation small { color: var(--text-3); font-size: 11px; font-weight: 500; }

.modal-backdrop { position: fixed; inset: 0; z-index: 500; display: grid; place-items: center; padding: 24px; background: rgba(8, 15, 28, .42); backdrop-filter: blur(8px); }
.confirm-dialog { width: min(460px, 100%); padding: 24px; border: 1px solid var(--separator); border-radius: 18px; background: var(--surface); box-shadow: var(--shadow-popover); }
.confirm-dialog__header { display: grid; gap: 5px; }
.confirm-dialog__header h2 { margin: 0; font-size: 22px; line-height: 1.2; letter-spacing: -.025em; }
.confirm-dialog > p { margin: 14px 0 0; color: var(--text-2); line-height: 1.6; }
.confirm-dialog__actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px; margin-top: 22px; }

@media (max-width: 640px) {
  .hero-setting-line { align-items: flex-start; flex-direction: column; gap: 3px; }
  .result-navigation-actions { grid-template-columns: 1fr; }
  .result-primary-actions .btn, .result-navigation-actions .btn { width: 100%; }
}


/* β 0.1.6 recommendation ladder */
.recommendation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s3);
}

.recommendation-card {
  min-width: 0;
  min-height: 270px;
  border: 1px solid var(--separator);
  border-radius: var(--r-lg);
  background: var(--surface);
  padding: var(--s5);
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.recommendation-card h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -.02em;
}

.recommendation-card > p {
  margin: 0;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.55;
}

.recommendation-card .btn {
  width: 100%;
  margin-top: auto;
}

.recommendation-tier {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.recommendation-tier span {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  padding: 0 9px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: .025em;
}

.recommendation-tier small {
  color: var(--text-3);
  font-size: 10px;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: .07em;
}

.recommendation-card.is-steady {
  border-color: color-mix(in srgb, var(--steady) 28%, var(--separator));
  background: color-mix(in srgb, var(--steady-soft) 72%, var(--surface));
}

.recommendation-card.is-steady .recommendation-tier span {
  background: color-mix(in srgb, var(--steady) 14%, var(--surface));
  color: var(--steady);
}

.recommendation-card.is-steady .btn {
  border-color: var(--steady);
  background: var(--steady);
  color: #fff;
}

.recommendation-card.is-steady .btn:hover {
  background: var(--steady-hover);
  border-color: var(--steady-hover);
}

.recommendation-card.is-develop {
  border-color: color-mix(in srgb, var(--accent) 34%, var(--separator));
  background: color-mix(in srgb, var(--accent-soft) 64%, var(--surface));
}

.recommendation-card.is-develop .recommendation-tier span {
  background: var(--accent-soft);
  color: var(--accent);
}

.recommendation-card.is-develop .btn {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.recommendation-card.is-develop .btn:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.recommendation-card.is-challenge {
  border-color: color-mix(in srgb, var(--challenge) 34%, var(--separator));
  background: color-mix(in srgb, var(--challenge-soft) 76%, var(--surface));
}

.recommendation-card.is-challenge .recommendation-tier span {
  background: var(--challenge-soft);
  color: var(--challenge);
}

.recommendation-card.is-challenge .btn {
  border-color: var(--challenge);
  background: var(--challenge);
  color: #fff;
}

.recommendation-card.is-challenge .btn:hover {
  background: var(--challenge-hover);
  border-color: var(--challenge-hover);
}

.recommendation-reason {
  padding-top: 10px;
  border-top: 1px solid var(--separator);
  color: var(--text-3) !important;
  font-size: 12px !important;
}

/* Analysis fingerprint hierarchy */
.analysis-fingerprint-row.is-secondary {
  margin: 1px -7px;
  padding: 8px 7px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent-soft) 58%, transparent);
}

.analysis-fingerprint-row.is-secondary .fingerprint-name,
.analysis-fingerprint-row.is-secondary .fingerprint-count {
  color: var(--text);
  font-weight: 690;
}

.analysis-fingerprint-row.is-secondary .bar > span {
  background: color-mix(in srgb, var(--accent) 72%, var(--text-3));
}

/* Make the requested Space keystroke visibly targetable */
.char[data-space="true"] {
  position: relative;
  display: inline-block;
  width: .34em;
  min-width: .34em;
  height: 1em;
  vertical-align: baseline;
  box-sizing: border-box;
}

.char.current[data-space="true"] {
  width: .34em;
  min-width: .34em;
  border-radius: 0;
  background: transparent;
  text-decoration: none;
}

.char.current[data-space="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
}

/* Compact header quick settings */
@media (max-width: 1180px) {
  .header-selector-button {
    min-width: 86px;
  }

  .header-selector-copy small {
    display: none;
  }
}

@media (max-width: 900px) {
  .topbar {
    align-items: flex-start;
  }

  .topbar-actions {
    max-width: 58vw;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .header-selector-button {
    min-width: auto;
  }

  .header-selector-button > svg:first-child {
    display: none;
  }
}

@media (max-width: 720px) {
  .recommendation-grid {
    grid-template-columns: 1fr;
  }

  .recommendation-card {
    min-height: auto;
  }

  .header-selector-copy strong {
    font-size: 12px;
  }
}

@media (max-width: 640px) {
  .topbar-actions {
    max-width: 64vw;
  }

  .header-selector-button {
    padding-inline: 8px;
  }

  .selector-chevron {
    display: none;
  }

  .page-intro h2 {
    font-size: 25px;
  }
}


/* β 0.1.9 — result action icon polish */
.result-primary-actions .btn svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  stroke-width: 2;
  overflow: visible;
}

/* Nonblank startup fallback; renderHome() replaces this immediately. */
.app-startup-fallback {
  min-height: 220px;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 6px;
  color: var(--text-2);
  text-align: center;
}

.app-startup-fallback strong {
  color: var(--text);
  font-size: 16px;
}

.app-startup-fallback span {
  color: var(--text-3);
  font-size: 13px;
}


/* v0.2 shipping-first content loading */
.content-loading-shell{min-height:100%;display:grid;place-items:center;padding:24px;background:var(--color-canvas,#f7f9fc)}
.content-loading-card{width:min(440px,100%);display:grid;justify-items:center;gap:10px;padding:32px;border:1px solid var(--color-border,#dfe5ee);background:var(--color-surface,#fff);text-align:center}
.content-loading-card svg{width:24px;height:24px;animation:typestride-spin 1s linear infinite}
.content-loading-card span{color:var(--color-text-muted,#6b7280);font-size:14px}
@keyframes typestride-spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.content-loading-card svg{animation:none}}


@media (max-width: 700px) {
  .mistyped-key-row {
    grid-template-columns: minmax(0, 1fr) 70px 54px;
  }
  .mistyped-key-row .bar { display: none; }
  .mistyped-key-name { align-items: flex-start; }
  .mistyped-key-name span { line-height: 1.35; }
  .result-section-header { display: grid; grid-template-columns: 1fr; }
  .result-material-progress { justify-items: start; }
  .result-material-text { max-height: 260px; }
}

/* v0.2.0-alpha.3 — targeted weak-key practice */
.target-focus-strip {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  margin: 8px 0 18px;
  border: 1px solid var(--separator);
  background: var(--surface-2);
}

.target-focus-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text-2);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .02em;
  text-transform: uppercase;
}

.target-focus-label svg { width: 15px; height: 15px; }

.target-focus-keys {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.target-focus-keys kbd,
.targeted-result-summary kbd {
  min-width: 32px;
  padding: 5px 7px;
  border: 1px solid var(--separator-strong, var(--separator));
  border-radius: 7px;
  background: var(--surface);
  color: var(--text-1);
  font: inherit;
  font-size: 13px;
  font-weight: 760;
  text-align: center;
}

.target-focus-strip small {
  color: var(--text-3);
  font-size: 12px;
  line-height: 1.45;
}

.weak-key-action {
  display: grid;
  justify-items: end;
  gap: 8px;
}

.weak-key-action > span {
  color: var(--text-3);
  font-size: 12px;
  font-weight: 700;
}

.weak-key-action .btn,
.weak-key-analysis .btn {
  white-space: nowrap;
}

.targeted-result-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 14px;
  margin-top: 14px;
  border: 1px solid var(--separator);
  background: var(--surface-2);
}

.targeted-result-summary > div {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.targeted-result-summary span {
  color: var(--text-3);
  font-size: 12px;
  font-weight: 740;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.targeted-result-summary strong {
  color: var(--text-1);
  font-size: 15px;
}

.targeted-result-summary small {
  color: var(--text-3);
  font-size: 12px;
  text-align: right;
}

.weak-key-analysis {
  margin-top: var(--s4);
}

.weak-key-analysis-list .mistyped-key-row .bar > span {
  background: var(--accent);
}

@media (max-width: 700px) {
  .target-focus-strip {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .weak-key-action {
    justify-items: start;
  }
  .targeted-result-summary {
    display: grid;
  }
  .targeted-result-summary > div {
    display: grid;
    gap: 4px;
  }
  .targeted-result-summary small {
    text-align: left;
  }
}

/* v0.2.1 — Student Pilot Readiness */
.content-delivery-status {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  margin: 12px 0 18px;
  border: 1px solid var(--line, #dfe5ee);
  background: var(--surface-soft, #f7f9fc);
  border-radius: 10px;
  color: var(--text, #17233d);
}
.content-delivery-status > i { flex: 0 0 auto; width: 17px; height: 17px; margin-top: 1px; }
.content-delivery-status div { display: grid; gap: 2px; }
.content-delivery-status strong { font-size: 13px; }
.content-delivery-status small { color: var(--muted, #667085); line-height: 1.45; }
.content-delivery-status.is-fallback { background: var(--warning-soft, #fff8e7); }
.result-content-source {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 18px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line, #e5e9f0);
  color: var(--muted, #667085);
  font-size: 12px;
}
.result-content-source small { max-width: 720px; line-height: 1.45; }

/* v0.3 Diagnostic Intelligence — use existing TypeStride surfaces and restraint. */
.check-entry, .check-summary, .diagnostic-next { display:flex; align-items:center; justify-content:space-between; gap:24px; }
.check-entry h3, .diagnostic-next h4, .diagnostic-selected h4 { margin:4px 0 8px; }
.check-entry p, .diagnostic-next p, .diagnostic-selected p { color:var(--text-2); line-height:1.65; margin:6px 0; }
.check-entry .btn, .diagnostic-next > .btn { flex-shrink:0; }
.check-copy { max-width:none; width:100%; }
.check-copy p { line-height:1.8; color:var(--text-2); }
.check-steps { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin:24px 0; }
.check-steps article { background:var(--surface-2); padding:20px; border-radius:var(--r-md); }
.check-steps article p { font-size:14px; }
.check-summary { padding:20px; border:1px solid var(--separator); border-radius:var(--r-md); margin:20px 0; }
.diagnostic-panel { min-width:0; }
.diagnostic-next { background:var(--surface-2); padding:20px; border-radius:var(--r-md); margin:24px 0; }
.diagnostic-next details, .diagnostic-method { margin-top:14px; line-height:1.7; font-size:14px; color:var(--text-2); }
.diagnostic-panel summary { cursor:pointer; font-weight:600; color:var(--text); }
.diagnostic-controls { display:flex; justify-content:space-between; align-items:center; gap:16px; flex-wrap:wrap; margin:24px 0 16px; }
.diagnostic-keyboard-scroll, .diagnostic-table-scroll { overflow-x:auto; max-width:100%; overscroll-behavior-x:contain; }
.diagnostic-keyboard { min-width:680px; padding:8px 4px 14px; }
.diagnostic-key-row { display:flex; justify-content:center; gap:5px; margin:5px 0; }
.diagnostic-key { appearance:none; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:6px; min-width:44px; flex:0 1 60px; min-height:62px; padding:8px 3px; background:var(--surface-2); color:var(--text); border:1px solid var(--separator-strong); border-radius:7px; cursor:pointer; }
.diagnostic-key strong { font-family:var(--font-mono); font-size:14px; }
.diagnostic-key small { font-size:10px; white-space:nowrap; }
.diagnostic-key.is-space { flex:0 1 320px; }
.diagnostic-key[data-sample="none"] { color:var(--text-2); border-style:dashed; }
.diagnostic-key[data-sample="low"] { background:var(--surface); border-style:dashed; }
.diagnostic-key[data-heat="1"] { background:var(--accent-soft); }
.diagnostic-key[data-heat="2"] { background:color-mix(in srgb,var(--accent) 24%,var(--surface)); }
.diagnostic-key[data-heat="3"] { background:var(--brand-blue); color:white; border-color:var(--brand-blue); }
.diagnostic-keyboard.is-staggered [data-row="1"] { padding-left:12px; }
.diagnostic-keyboard.is-staggered [data-row="2"] { padding-left:24px; }
.diagnostic-selected { display:flex; align-items:center; justify-content:space-between; gap:20px; padding:20px; background:var(--surface-2); border-radius:var(--r-md); margin:18px 0 26px; }
.diagnostic-selected .btn { flex-shrink:0; }
.diagnostic-evidence { font-size:12px; font-weight:500; color:var(--text-2); margin-left:10px; }
.diagnostic-pattern-heading { margin:24px 0 12px; }
.diagnostic-table { width:100%; border-collapse:collapse; font-size:13px; }
.diagnostic-table th, .diagnostic-table td { padding:12px 10px; text-align:left; border-bottom:1px solid var(--separator); white-space:nowrap; }
.diagnostic-table thead th { color:var(--text-2); font-weight:500; }
.diagnostic-pattern { font:600 14px var(--font-mono); padding:5px 0; background:transparent; border:0; color:var(--accent); cursor:pointer; }
.diagnostic-footnote { font-size:12px; line-height:1.7; color:var(--text-2); margin:14px 0; }
.diagnostic-scope { display:flex; align-items:center; gap:12px; margin:0 0 18px; flex-wrap:wrap; }
.diagnostic-scope select { padding:8px 12px; background:var(--surface); color:var(--text); border:1px solid var(--separator-strong); border-radius:var(--r-sm); }
.diagnostic-panel button:focus-visible, .diagnostic-panel summary:focus-visible { outline:3px solid var(--focus); outline-offset:3px; }
#result-diagnostics { margin-top:24px; }
@media (max-width: 760px) {
  .check-entry, .diagnostic-next, .diagnostic-selected, .check-summary { flex-direction:column; align-items:stretch; gap:16px; }
  .check-steps { grid-template-columns:1fr; }
}
@media (max-width: 640px) {
  .nav-list { grid-template-columns:repeat(5,1fr); }
  .nav-item { font-size:11px; padding:10px 3px; }
}

/* Keep variable-length session metadata out of the expanding typing row. */
.session-body { grid-template-rows:auto minmax(160px,1fr) auto; overflow:visible; }
.session-context { min-width:0; }
.session-context .content-delivery-status { margin-bottom:0; }
.content-delivery-status { background:var(--surface-2); border-color:var(--separator); color:var(--text); }
.content-delivery-status small { color:var(--text-2); }
.check-summary > .btn { flex-shrink:0; white-space:nowrap; }
/* Min-content tables/heatmaps must scroll locally, not widen their grid ancestors. */
.page-stack { grid-template-columns:minmax(0,1fr); }
.page-stack > *, .analysis-two > * { min-width:0; }

/* v0.3 beta — purpose, evidence and recheck without visual noise. */
.check-mode-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px; margin:20px 0; }
.check-mode-grid .choice-card { height:100%; text-align:left; }
.check-mode-grid .choice-card span { line-height:1.6; }
.check-plan-summary { padding:18px 20px; background:var(--surface-2); border-radius:var(--r-md); }
.check-plan-summary p { margin:8px 0 0; }
.check-baseline, .recheck-transfer { display:flex; gap:24px; align-items:center; justify-content:space-between; }
.check-baseline { padding-top:20px; border-top:1px solid var(--separator); }
.check-baseline p { margin-bottom:0; }
.check-baseline .btn, .recheck-transfer .btn, .check-comparison .section-header > .btn { flex-shrink:0; }
.recheck-transfer, #result-check-comparison { margin-top:24px; }
.check-comparison { min-width:0; }
.check-comparison > p { margin-top:16px; line-height:1.7; }
.comparison-dates { color:var(--text-2); font-size:13px; }
.comparison-metrics { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:16px; margin:24px 0; padding:20px; background:var(--surface-2); border-radius:var(--r-md); }
.comparison-metrics > div { display:flex; flex-direction:column; gap:8px; min-width:0; }
.comparison-metrics span, .comparison-metrics small { font-size:12px; color:var(--text-2); line-height:1.5; }
.comparison-metrics strong { font-size:24px; font-weight:600; font-variant-numeric:tabular-nums; }
.comparison-table small { display:block; color:var(--text-2); font-size:11px; margin-top:5px; }
.comparison-table th[scope="row"] { font-family:var(--font-mono); }
.check-copy button:focus-visible, .check-comparison button:focus-visible, .check-comparison summary:focus-visible, .diagnostic-table-scroll:focus-visible, .diagnostic-keyboard-scroll:focus-visible { outline:3px solid var(--focus); outline-offset:3px; }
@media (max-width:760px) {
  .check-mode-grid { grid-template-columns:1fr; }
  .comparison-metrics { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .check-baseline, .recheck-transfer { flex-direction:column; align-items:stretch; gap:16px; }
  .check-comparison .section-header { flex-direction:column; align-items:stretch; }
}
@media (prefers-reduced-motion: reduce) {
  .check-mode-grid *, .check-comparison *, .diagnostic-panel * { scroll-behavior:auto; transition:none; }
}

/* v0.3 beta.3 — visible, recoverable English-input warnings. */
.session-notice {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  padding: 18px 20px;
  text-align: center;
  color: var(--text);
  border: 1px solid var(--warning);
  overflow-wrap: anywhere;
}
.session-notice-message {
  display: block;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.6;
  font-weight: 750;
  text-align: center;
}
.session-notice-detail {
  max-width: 66ch;
  margin: 0;
  color: var(--text-2);
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
}
.session-notice .btn { min-width: 120px; }
@media (max-width: 640px) {
  .session-notice { padding: 14px 12px; }
  .session-notice-message { font-size: 15px; }
}

/* v0.3 beta.4 — one recommended target, optional explicit-selection inspector. */
.diagnostic-next-title { display:flex; flex-wrap:wrap; align-items:baseline; gap:6px 14px; }
.diagnostic-next-title .diagnostic-evidence { margin-left:0; }
.diagnostic-selected[hidden] { display:none; }

/* v0.4 — a quiet, optional learner identity layer. */
.account-chip { display:inline-flex; align-items:center; margin-top:8px; max-width:200px; padding:5px 9px; border:1px solid var(--separator); border-radius:var(--r-sm); background:var(--surface); color:var(--text-2); font:600 12px var(--font-ui); cursor:pointer; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.account-chip:hover {color:var(--accent);border-color:var(--accent);}
.account-chip:focus-visible,.account-panel button:focus-visible,.account-panel input:focus-visible,.account-detail summary:focus-visible {outline:3px solid var(--focus);outline-offset:3px;}
.account-panel {min-width:0;scroll-margin-top:20px;}
.account-panel .section-header {align-items:flex-start;gap:16px;flex-wrap:wrap;}
.account-panel h3 {margin:4px 0 0;}
.account-status {display:inline-flex;max-width:100%;padding:6px 10px;border:1px solid var(--separator);border-radius:var(--r-sm);color:var(--text-2);font-size:12px;line-height:1.6;}
.account-intro {color:var(--text-2);line-height:1.7;margin:20px 0 12px;overflow-wrap:anywhere;}
.account-feedback {font-size:14px;color:var(--text);line-height:1.7;overflow-wrap:anywhere;}
.account-feedback:empty {display:none;}
.account-tabs {margin:18px 0;max-width:600px;}
.account-form {display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 24px;max-width:780px;margin:22px 0;align-items:start;}
.account-form .field {min-width:0;}
.account-form .field[hidden],.account-form [hidden] {display:none;}
.account-form input {display:block;width:100%;max-width:100%;border:1px solid var(--separator-strong);border-radius:var(--r-sm);background:var(--surface);color:var(--text);padding:12px 14px;font:inherit;}
.account-form small {line-height:1.7;}
.account-form > button {justify-self:start;grid-column:1/-1;}
.account-stats {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:22px 0;padding:20px;background:var(--surface-2);border-radius:var(--r-md);}
.account-stats div {display:flex;flex-direction:column;gap:8px;min-width:0;}
.account-stats span {font-size:12px;color:var(--text-2);}
.account-stats strong {font-size:22px;overflow-wrap:anywhere;font-variant-numeric:tabular-nums;}
.account-actions {flex-wrap:wrap;}
.account-import {display:flex;gap:24px;align-items:center;justify-content:space-between;margin:24px 0;padding:20px;border:1px solid var(--separator);border-radius:var(--r-md);}
.account-import p {color:var(--text-2);line-height:1.7;margin:8px 0 0;}
.account-import > button {flex-shrink:0;}
.account-detail {margin-top:22px;line-height:1.8;color:var(--text-2);}
.account-detail summary {color:var(--text);font-weight:600;cursor:pointer;}
.account-conflict {padding:20px;margin-top:20px;border:1px solid var(--warning);border-radius:var(--r-md);background:var(--surface-2);line-height:1.7;}
.account-recovery-dialog {width:min(580px,calc(100vw - 32px));max-height:85vh;overflow:auto;padding:28px;border:1px solid var(--separator);border-radius:var(--r-lg);color:var(--text);background:var(--surface);}
.account-recovery-dialog::backdrop {background:rgb(0 0 0 / .45);}
.account-recovery-dialog p {line-height:1.8;color:var(--text-2);}
.account-recovery-dialog pre {white-space:pre-wrap;overflow-wrap:anywhere;padding:16px;background:var(--surface-2);border-radius:var(--r-sm);}
.result-sync-status {font-size:13px;line-height:1.7;color:var(--text-2);}
@media (max-width:760px) {
  .account-form {grid-template-columns:minmax(0,1fr);}
  .account-import {flex-direction:column;align-items:stretch;gap:16px;}
  .account-stats {grid-template-columns:repeat(2,minmax(0,1fr));}
  .account-actions .btn {white-space:normal;}
}
@media (max-width:640px) {
  .account-chip {max-width:118px;font-size:11px;}
  .account-panel .section-header {flex-direction:column;}
}

/* v0.4 alpha.2 — portable Writing collection; no external chart library. */
.writing-picker { padding:20px; border:1px solid var(--separator); border-radius:var(--r-md); background:var(--surface-2); }
.writing-picker-controls { display:grid; grid-template-columns:minmax(180px,0.7fr) minmax(0,1.5fr); gap:16px; }
.writing-picker select { width:100%; min-width:0; }
.writing-picker-note { margin:2px 0 0; color:var(--text); font-size:14px; line-height:1.6; }
.writing-picker details > summary, .result-writing-reference > summary { cursor:pointer; color:var(--text); font-size:14px; font-weight:650; line-height:1.6; }
.writing-reference { min-width:0; color:var(--text); }
.writing-reference-head h3 { margin:8px 0 12px; font-size:20px; line-height:1.4; }
.writing-prompt { margin:0 0 18px; font-size:14px; line-height:1.75; color:var(--text-2); }
.writing-reference-note { margin:16px 0 0; font-size:12px; line-height:1.7; color:var(--text-2); }
#writing-preview { margin-top:18px; }
#writing-preview.writing-reference { background:var(--surface); padding:22px; border:1px solid var(--separator); border-radius:var(--r-md); }
.writing-visual { min-width:0; margin:16px 0; }
.writing-visual > figcaption { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.writing-chart { display:block; width:100%; height:auto; overflow:visible; font-family:var(--font-ui); }
.writing-chart-unit { margin:0 0 12px; font-size:12px; line-height:1.5; color:var(--text-2); }
.writing-axis { fill:var(--text-2); font-size:14px; font-variant-numeric:tabular-nums; }
.writing-axis-label { font-size:13px; }
.writing-gridline { stroke:var(--separator-strong); stroke-width:1; }
.writing-series-0 { --series:#1764c0; fill:var(--series); stroke:var(--series); color:var(--series); }
.writing-series-1 { --series:#207663; fill:var(--series); stroke:var(--series); color:var(--series); }
.writing-series-2 { --series:#97519e; fill:var(--series); stroke:var(--series); color:var(--series); }
.writing-series-3 { --series:#965719; fill:var(--series); stroke:var(--series); color:var(--series); }
.writing-series-4 { --series:#45577c; fill:var(--series); stroke:var(--series); color:var(--series); }
.writing-line { fill:none; stroke-width:3; }
.writing-legend { display:flex; flex-wrap:wrap; justify-content:center; gap:8px 18px; font-size:12px; line-height:1.6; margin:10px 0 8px; color:var(--text-2); }
.writing-legend > span { display:inline-flex; gap:7px; align-items:center; }
.writing-swatch { width:14px; height:14px; flex:0 0 14px; border-radius:2px; background:var(--series); display:inline-flex; align-items:center; justify-content:center; font-size:10px; color:white; }
.writing-data-disclosure { margin-top:16px; }
.writing-data-disclosure > summary { font-size:13px; font-weight:650; cursor:pointer; }
.writing-table-scroll { width:100%; overflow:auto; margin-top:10px; overscroll-behavior:contain; }
.writing-data-table { border-collapse:collapse; width:100%; font-size:13px; font-variant-numeric:tabular-nums; }
.writing-data-table caption { text-align:left; color:var(--text-2); font-size:12px; line-height:1.6; padding:0 0 10px; }
.writing-data-table th,.writing-data-table td { padding:12px 10px; border-bottom:1px solid var(--separator); text-align:right; }
.writing-data-table th { font-weight:600; line-height:1.5; }
.writing-data-table th:first-child { text-align:left; }
.writing-data-table thead { background:var(--surface-2); }
.writing-data-table td { white-space:nowrap; }
.writing-pies { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; }
.writing-pie-heading { font-size:17px; font-weight:650; fill:var(--text); }
.writing-pie-slice { stroke:var(--surface); stroke-width:1.5; }
.writing-pie-value { fill:white; font-size:17px; font-weight:650; }
.writing-answer-preview { margin-top:20px; }
.writing-answer-preview p { font-size:15px; line-height:1.8; color:var(--text-2); }
.writing-session-tools { display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:10px 16px; margin-top:14px; }
.writing-session-tools > span { font-size:12px; line-height:1.6; color:var(--text-2); }
.writing-session-tools > div { display:flex; gap:8px; flex-wrap:wrap; }
.writing-session-tools .btn { padding:8px 12px; font-size:12px; }
.has-writing-reference .session-body { width:min(1420px,calc(100% - 48px)); }
.writing-workspace { display:grid; grid-template-columns:minmax(0,0.9fr) minmax(0,1.1fr); align-items:stretch; gap:28px; min-height:0; }
.writing-workspace.reference-hidden { grid-template-columns:minmax(0,1fr); }
#writing-session-reference { padding:20px; background:var(--surface); border:1px solid var(--separator); border-radius:var(--r-md); overflow:auto; overscroll-behavior:contain; min-height:0; }
.writing-workspace .typing-wrap { width:100%; max-width:820px; padding:12px 12px 24px; }
.writing-workspace .typing-text { font-size:clamp(21px,2.2vw,27px); line-height:1.8; }
.result-writing-reference { margin-top:18px; }
#result-writing-reference { margin-top:16px; max-width:850px; }
.writing-reference summary:focus-visible,.writing-picker summary:focus-visible,.writing-table-scroll:focus-visible,.writing-session-tools .btn:focus-visible { outline:3px solid var(--focus); outline-offset:3px; }
@media (max-width:900px) {
  .has-writing-reference .session-body { height:auto; min-height:calc(100vh - 68px); width:calc(100% - 32px); grid-template-rows:auto auto auto; }
  .writing-workspace { grid-template-columns:minmax(0,1fr); gap:20px; }
  #writing-session-reference { max-height:72vh; min-height:220px; }
  .writing-workspace .typing-wrap { max-height:70vh; min-height:220px; }
}
@media (max-width:600px) {
  .writing-picker { padding:14px; }
  .writing-picker-controls { grid-template-columns:minmax(0,1fr); gap:12px; }
  #writing-preview.writing-reference { padding:14px; }
  #writing-session-reference { padding:14px; }
  .writing-pies { grid-template-columns:minmax(0,1fr); }
  .writing-pie { max-width:320px; margin:0 auto; }
  .writing-data-table { font-size:12px; }
  .writing-data-table th,.writing-data-table td { padding:10px 6px; }
  .writing-reference-head h3 { font-size:18px; }
}
@media (prefers-color-scheme:dark) {
  :root:not([data-theme="light"]) .writing-series-0 { --series:#77b8ff; }
  :root:not([data-theme="light"]) .writing-series-1 { --series:#60c4a4; }
  :root:not([data-theme="light"]) .writing-series-2 { --series:#d596dd; }
  :root:not([data-theme="light"]) .writing-series-3 { --series:#e5b178; }
  :root:not([data-theme="light"]) .writing-pie-value { fill:#142037; }
}
:root[data-theme="dark"] .writing-series-0 { --series:#77b8ff; }
:root[data-theme="dark"] .writing-series-1 { --series:#60c4a4; }
:root[data-theme="dark"] .writing-series-2 { --series:#d596dd; }
:root[data-theme="dark"] .writing-series-3 { --series:#e5b178; }
:root[data-theme="dark"] .writing-pie-value { fill:#142037; }
@media (prefers-reduced-motion:reduce) { .writing-workspace *, .writing-reference * { scroll-behavior:auto; transition:none; } }
/* Constrain the desktop grid itself; a flex auto-minimum would let the sticky
   assist area cover the bottom of the reference rather than allocate its row. */
@media (min-width:901px) {
  .has-writing-reference .session-body { flex:none; min-height:0; height:calc(100dvh - 68px); }
  .has-writing-reference .session-assist { position:relative; bottom:auto; }
}
.practice-setup-form { grid-template-columns:minmax(0,1fr); }
.practice-setup-form > *, .practice-setup-form .field { min-width:0; }
.practice-setup-form .field { grid-template-columns:minmax(0,1fr); }
.practice-setup-form select { max-width:100%; width:100%; min-width:0; }
@media (max-width:600px) {
  .practice-setup-form #family-segment { display:flex; flex-wrap:wrap; width:100%; }
  .practice-setup-form #family-segment button { flex:1 1 84px; }
}
@media (min-width:901px) {
  #writing-session-reference .writing-reference-head h3 { font-size:18px; }
  #writing-session-reference .writing-prompt { font-size:13px; line-height:1.65; margin-bottom:12px; }
  #writing-session-reference .writing-chart:not(.writing-pie) { max-height:240px; }
  #writing-session-reference .writing-chart-unit { margin-bottom:6px; }
  #writing-session-reference .writing-legend { margin-top:6px; }
}

/* Wide desktop: the task spans both the typing and assist rows. The graph is
   not squeezed out of view when the learner keeps the visual keyboard on. */
@media (min-width:1200px) {
  .has-writing-reference .session-body { grid-template-columns:minmax(0,0.9fr) minmax(0,1.1fr); column-gap:28px; }
  .has-writing-reference .session-context { grid-column:1/-1; }
  .has-writing-reference .writing-workspace { display:contents; }
  .has-writing-reference #writing-session-reference { grid-column:1; grid-row:2/4; }
  .has-writing-reference .typing-wrap { grid-column:2; grid-row:2; }
  .has-writing-reference .session-assist { grid-column:2; grid-row:3; min-width:0; }
  .has-writing-reference.reference-hidden .session-body { grid-template-columns:minmax(0,1fr); }
  .has-writing-reference.reference-hidden .typing-wrap,
  .has-writing-reference.reference-hidden .session-assist { grid-column:1; }
  .has-writing-reference .key-row { gap:4px; }
  .has-writing-reference .key { min-width:30px; padding:0 6px; }
  .has-writing-reference .key.wide { min-width:58px; }
  .has-writing-reference .key.space { width:230px; }
  #writing-session-reference .writing-chart:not(.writing-pie) { max-height:300px; }
}

/* v0.4 alpha.3 — finite untimed practice, explicit exit choice, quiet provenance. */
#family-segment { display:flex; flex-wrap:wrap; }
#family-segment button { white-space:normal; }
.session-length-note { margin:0; color:var(--text-2); font-size:14px; line-height:1.7; }
.session-toolbar-center.is-untimed-clock { display:flex; flex-direction:column; align-items:center; gap:2px; line-height:1.2; }
.is-untimed-clock small { font-size:11px; font-weight:500; color:var(--text-2); letter-spacing:0; white-space:nowrap; }
.is-untimed-clock [data-elapsed] { font-variant-numeric:tabular-nums; }
.session-finish-actions { display:grid; grid-template-columns:minmax(0,1fr); }
.session-finish-actions .btn { justify-content:center; white-space:normal; }
.session-finish-actions .btn:disabled { opacity:.5; cursor:not-allowed; }
.result-session-condition, .result-sample-note { line-height:1.7; font-size:13px; color:var(--text-2); }
#result-repeat-untimed { white-space:normal; }
.writing-reference { display:flex; flex-direction:column; }
.writing-reference > * { flex-shrink:0; }
.writing-reference-note { margin:24px 0 0; padding-top:12px; border-top:1px solid var(--separator); font-size:11px; line-height:1.7; }
#writing-session-reference .writing-reference-note { margin-top:auto; padding-top:12px; }
#writing-session-reference .writing-reference-head { margin-bottom:16px; }
/* Explicit layout must not override the HTML hidden attribute. */
.writing-reference[hidden] { display:none; }

/* v0.5 — Learn: calm guidance, separate from measured Practice. */
.home-learn-entry { display:flex; align-items:center; justify-content:space-between; gap:24px; }
.home-learn-entry h3 { margin:5px 0 10px; }
.home-learn-entry p { color:var(--text-2); line-height:1.7; margin:0 0 8px; }
.home-learn-entry small { color:var(--text-2); }
.home-learn-entry > .btn { flex-shrink:0; }
.learn-page { line-height:1.65; }
.learn-page h2, .learn-page h3, .learn-page h4 { line-height:1.3; }
.learn-page .panel > p { color:var(--text-2); }
.learn-page h2:focus, .lesson-stage-result h2:focus { outline:none; }
.learn-hero { display:grid; grid-template-columns:minmax(0,1fr) minmax(220px, .45fr); gap:36px; align-items:center; padding:8px 0; }
.learn-hero h2 { font-size:clamp(26px,3vw,38px); letter-spacing:-.025em; margin:8px 0 16px; }
.learn-hero p { max-width:62ch; color:var(--text-2); }
.learn-actions { display:flex; flex-wrap:wrap; align-items:center; gap:12px; margin-top:20px; }
.learn-actions .btn { white-space:normal; }
.learn-summary { background:var(--surface); border:1px solid var(--separator); border-radius:var(--r-lg); padding:24px; display:flex; flex-direction:column; gap:8px; }
.learn-summary > strong { font-size:44px; line-height:1.2; font-weight:600; }
.learn-summary strong small { font-size:20px; color:var(--text-2); font-weight:400; }
.learn-summary p { font-size:13px; margin:0; }
.learn-summary progress, .lesson-progress-line progress { width:100%; height:7px; accent-color:var(--accent); border:0; }
.learn-sequence ol { list-style:none; display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:16px; padding:0; margin:22px 0; }
.learn-sequence li { display:flex; flex-direction:column; gap:4px; }
.learn-sequence li > span { color:var(--accent); font-weight:600; font-size:12px; }
.learn-sequence small { color:var(--text-2); }
.learn-lesson-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:18px; }
.learn-lesson-card { display:flex; flex-direction:column; gap:14px; padding:22px; border:1px solid var(--separator); border-radius:var(--r-md); background:var(--surface); }
.learn-card-top { display:flex; align-items:center; gap:12px; justify-content:space-between; }
.learn-number { font:600 14px var(--font-mono); color:var(--text-2); }
.lesson-status { font-size:11px; color:var(--text-2); border:1px solid var(--separator); padding:4px 8px; border-radius:6px; }
.lesson-status.is-done { color:var(--success); background:var(--success-soft); }
.learn-lesson-card h4 { margin:0; font-size:18px; }
.learn-lesson-card p { color:var(--text-2); font-size:14px; margin:0; flex:1; }
.learn-mini-stages { display:flex; gap:8px; }
.learn-mini-stages span { font:12px var(--font-mono); padding:5px 8px; border:1px solid var(--separator); border-radius:4px; min-width:26px; }
.learn-mini-stages .is-done { background:var(--success-soft); color:var(--success); }
.learn-back { justify-self:start; }
.learn-intro-copy { max-width:78ch; font-size:18px; line-height:1.8; }
.learn-callout { padding:20px 24px; background:var(--surface-2); border-radius:var(--r-md); margin-top:24px; }
.learn-callout p { margin:8px 0 0; }
.learn-tips { padding-left:20px; color:var(--text-2); line-height:1.8; max-width:82ch; }
.learn-tips li { margin-bottom:8px; }
.learn-stage-list > div { display:grid; grid-template-columns:28px minmax(0,1fr) auto; align-items:center; gap:18px; padding:20px 0; border-bottom:1px solid var(--separator); }
.learn-stage-list > div:last-child { border:0; }
.learn-stage-list h4 { margin:0 0 5px; }
.learn-stage-list p { margin:0 0 5px; color:var(--text-2); }
.learn-stage-list small, .lesson-local-note, .lesson-guide-footnote { font-size:12px; line-height:1.65; color:var(--text-2); }
.lesson-local-note { margin:0; }
/* The keyboard is an illustrative map, not a clickable alternative to physical keys. */
.lesson-guide { min-width:0; margin-top:18px; }
.lesson-finger-legend { display:grid; grid-template-columns:1fr 1fr; gap:28px; margin:0 auto 16px; max-width:880px; }
.lesson-finger-legend > div > strong { display:block; font-size:12px; margin-bottom:8px; color:var(--text-2); }
.lesson-finger-legend > div > div { display:flex; gap:5px; }
.lesson-finger-legend span { display:flex; align-items:center; flex-direction:column; gap:4px; flex:1; font-size:11px; padding:8px 3px; border:1px solid var(--separator); border-radius:6px; color:var(--text-2); }
.lesson-finger-legend span b { font:600 13px var(--font-mono); }
.lesson-keyboard-scroll { max-width:100%; overflow-x:auto; overscroll-behavior-x:contain; padding:5px 2px 12px; }
.lesson-keyboard { min-width:650px; max-width:1000px; margin:auto; }
.lesson-key-row { display:flex; justify-content:center; gap:5px; margin-bottom:6px; }
.lesson-key { display:flex; flex-direction:column; align-items:center; justify-content:center; gap:4px; min-width:39px; flex:0 1 61px; min-height:49px; padding:5px 2px; border:1px solid var(--separator-strong); border-radius:6px; background:var(--surface); }
.lesson-key b { font:600 15px var(--font-mono); }
.lesson-key small { font:10px var(--font-mono); color:var(--text-2); white-space:nowrap; }
.lesson-key.is-home { box-shadow:inset 0 -3px var(--separator-strong); }
.lesson-key.is-space { flex:0 1 290px; }
.lesson-key.is-wide { flex:0 1 92px; }
.lesson-guide.is-staggered [data-row="1"] { padding-left:15px; }
.lesson-guide.is-staggered [data-row="2"] { padding-left:28px; }
.lesson-edit-keys { display:flex; flex-wrap:wrap; justify-content:center; gap:6px; margin-top:2px; }
.lesson-edit-keys span { font-size:11px; padding:6px 9px; border:1px solid var(--separator); border-radius:5px; }
.lesson-guide .is-target { background:var(--accent-soft); border-color:var(--accent); outline:2px solid var(--accent); outline-offset:-2px; color:var(--text); }
.lesson-guide-footnote { margin:12px 0 0; }
/* Lesson sessions use their own finite, locally checkpointed engine. */
.is-lesson-layer { overflow:auto; background:var(--bg); }
.lesson-shell { max-width:1140px; margin:0 auto; padding:0 28px 32px; }
.lesson-toolbar { position:sticky; top:0; z-index:5; display:flex; align-items:center; justify-content:space-between; gap:18px; padding:18px 0; background:var(--bg); border-bottom:1px solid var(--separator); }
.lesson-toolbar > div { display:flex; flex-direction:column; gap:4px; text-align:center; }
.lesson-toolbar strong { font-size:15px; }
.lesson-main { display:grid; grid-template-columns:minmax(0,1fr); gap:20px; margin-top:24px; }
.lesson-main > * { min-width:0; }
.lesson-stage-track { list-style:none; display:flex; justify-content:center; gap:24px; padding:0; margin:0; flex-wrap:wrap; }
.lesson-stage-track li { display:flex; gap:8px; align-items:center; font-size:12px; color:var(--text-2); }
.lesson-stage-track li > span { border-radius:50%; width:24px; height:24px; display:inline-grid; place-items:center; background:var(--surface-2); }
.lesson-stage-track [aria-current] { font-weight:600; color:var(--accent); }
.lesson-stage-track [aria-current] > span { background:var(--accent-soft); }
.lesson-stage-intro { display:grid; grid-template-columns:minmax(0,1fr) minmax(230px,.8fr); gap:24px; align-items:start; }
.lesson-stage-intro h2 { margin:4px 0 10px; font-size:26px; }
.lesson-stage-intro p { color:var(--text-2); line-height:1.65; margin:0; }
.lesson-help { font-size:13px; line-height:1.7; color:var(--text-2); }
.lesson-help summary { font-weight:600; cursor:pointer; color:var(--text); padding:7px 0; }
.lesson-help p { margin:8px 0; }
.lesson-help ul { padding-left:18px; margin:8px 0 0; }
.lesson-help li { margin-top:7px; }
.lesson-work { padding:22px 26px; }
.lesson-next { display:flex; align-items:center; gap:24px; justify-content:space-between; margin-bottom:20px; }
.lesson-next > div { display:flex; align-items:center; gap:14px; }
.lesson-next kbd { background:var(--accent-soft); color:var(--text); border:1px solid var(--accent); border-radius:8px; padding:8px 12px; font:600 20px var(--font-mono); min-width:46px; text-align:center; }
.lesson-next p { font-size:13px; color:var(--text-2); max-width:60ch; line-height:1.65; margin:0; }
.lesson-target { font:clamp(22px,2.5vw,30px)/1.9 var(--font-mono); white-space:pre-wrap; overflow-wrap:anywhere; letter-spacing:.04em; margin:16px 0; }
.lesson-target [data-lesson-char] { border-radius:3px; }
.lesson-target [data-space] { display:inline; padding:0; }
.lesson-target .is-typed { color:var(--text-2); }
.lesson-target .has-first-error { text-decoration:underline; text-decoration-style:dotted; text-decoration-color:var(--warning); text-underline-offset:5px; }
.lesson-target .is-current { background:var(--accent-soft); color:var(--accent); outline:2px solid var(--accent); outline-offset:1px; }
.lesson-feedback { color:var(--text-2); font-size:13px; line-height:1.65; min-height:22px; margin:12px 0; }
.lesson-feedback.is-warning { color:var(--warning); }
.lesson-progress-line { display:flex; align-items:center; gap:20px; margin-top:16px; }
.lesson-progress-line span { font-size:12px; color:var(--text-2); flex-shrink:0; font-variant-numeric:tabular-nums; }
.lesson-capture { position:fixed; top:100px; left:40px; width:1px; height:1px; padding:0; margin:0; opacity:0; border:0; resize:none; overflow:hidden; }
.lesson-work:focus-within { outline:2px solid var(--focus); outline-offset:3px; }
.lesson-editor { font:clamp(22px,2.5vw,30px)/1.9 var(--font-mono); padding:16px 18px; min-height:85px; background:var(--surface-2); border:1px solid var(--separator-strong); border-radius:8px; white-space:pre-wrap; overflow-wrap:anywhere; }
.lesson-selection { background:var(--accent); color:var(--surface); }
.lesson-caret { display:inline-block; width:2px; height:1.1em; background:var(--text); vertical-align:middle; margin-left:-1px; margin-right:-1px; }
.lesson-edit-goal { font-size:13px; color:var(--text-2); line-height:1.7; }
.lesson-edit-goal samp { white-space:pre-wrap; color:var(--text); }
.lesson-controls-help { display:flex; gap:20px; align-items:center; justify-content:space-between; }
.lesson-controls-help p { font-size:12px; line-height:1.7; color:var(--text-2); margin:0; }
.lesson-controls-help .btn { flex-shrink:0; }
.lesson-result-metrics { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:24px; margin:28px 0; background:var(--surface-2); border-radius:12px; padding:24px; }
.lesson-result-metrics > div { display:flex; flex-direction:column; gap:8px; }
.lesson-result-metrics strong { font-size:32px; font-weight:600; }
.lesson-result-metrics span, .lesson-result-metrics small { font-size:12px; line-height:1.7; color:var(--text-2); }
.lesson-status-line { line-height:1.8; }
.lesson-stage-result h2 { margin:8px 0 16px; }
.lesson-stage-result > p { color:var(--text-2); line-height:1.8; }
.learn-page button:focus-visible, .learn-page summary:focus-visible, .lesson-main button:focus-visible, .lesson-main summary:focus-visible, .lesson-keyboard-scroll:focus-visible { outline:3px solid var(--focus); outline-offset:3px; }
@media (max-width:1000px) { .learn-lesson-grid { grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (max-width:760px) {
  .home-learn-entry { flex-direction:column; align-items:stretch; }
  .learn-hero { grid-template-columns:minmax(0,1fr); gap:20px; }
  .learn-summary { padding:20px; }
  .learn-sequence ol { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .lesson-stage-intro { grid-template-columns:minmax(0,1fr); gap:10px; }
  .lesson-next { flex-direction:column; align-items:flex-start; gap:12px; }
  .lesson-controls-help { flex-direction:column; align-items:stretch; gap:12px; }
  .lesson-finger-legend { gap:12px; }
  .lesson-finger-legend span { font-size:9px; }
  .lesson-stage-track { gap:10px 16px; }
  .lesson-shell { padding:0 16px 24px; }
  .lesson-toolbar { gap:10px; padding:12px 0; }
  .lesson-toolbar strong { font-size:12px; }
  .lesson-toolbar .btn { padding:9px 12px; }
  .lesson-work { padding:20px 16px; }
  .lesson-result-metrics { gap:16px; padding:16px; }
}
@media (max-width:640px) {
  .nav-list { grid-template-columns:repeat(6,minmax(0,1fr)); }
  .nav-item { font-size:10px; padding:10px 2px; }
  .learn-lesson-grid { grid-template-columns:minmax(0,1fr); }
  .learn-stage-list > div { grid-template-columns:20px minmax(0,1fr); gap:12px; }
  .learn-stage-list .btn { grid-column:2; justify-self:start; }
  .lesson-result-metrics { grid-template-columns:minmax(0,1fr); }
  .lesson-progress-line { gap:12px; }
}
@media (prefers-reduced-motion:reduce) { .lesson-main *, .learn-page * { scroll-behavior:auto; transition:none; animation:none; } }
.is-lesson-layer [hidden] { display:none !important; }

.lesson-key.is-ridge b { text-decoration:underline; text-underline-offset:3px; text-decoration-thickness:2px; }
.learn-summary progress, .lesson-progress-line progress { border-radius:8px; overflow:hidden; background:var(--separator); }
.learn-summary progress::-webkit-progress-bar, .lesson-progress-line progress::-webkit-progress-bar { background:var(--separator); }
.learn-summary progress::-webkit-progress-value, .lesson-progress-line progress::-webkit-progress-value { background:var(--accent); }
.lesson-finger-legend { grid-template-columns:repeat(2,minmax(0,1fr)); }
.lesson-finger-legend > div, .lesson-finger-legend span { min-width:0; }
@media (max-width:600px) {
  .lesson-finger-legend { grid-template-columns:minmax(0,1fr); gap:12px; }
  .lesson-finger-legend span { font-size:10px; }
}

.lesson-edit-effect { font-size:13px; line-height:1.7; color:var(--text-2); padding:10px 0; white-space:pre-wrap; }

/* v0.6 — private CBT writing, separate from transcription and guided Learn. */
.cbt-mode-cards { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px; }
.cbt-mode-cards .choice-card { text-align:left; }
.cbt-mode-cards span { display:block; margin-top:8px; line-height:1.6; }
.cbt-form { margin:24px 0; }
.cbt-setup textarea, .cbt-setup input:not([type=checkbox]) { width:100%; padding:12px; color:var(--text); background:var(--surface); border:1px solid var(--separator-strong); border-radius:var(--r-sm); font:inherit; }
.cbt-setup textarea { line-height:1.7; resize:vertical; }
.cbt-actions { display:flex; align-items:center; flex-wrap:wrap; gap:12px; }
.cbt-small { font-size:13px; line-height:1.7; color:var(--text-2); }
.cbt-small p { margin:10px 0; }
.cbt-condition-copy { padding:18px 20px; margin:0 0 20px; background:var(--surface-2); border-radius:var(--r-md); font-size:14px; line-height:1.75; }
.cbt-condition-copy p { margin:8px 0 0; }
.cbt-preview { margin-top:24px; }
.cbt-preview > summary, .cbt-review summary, .cbt-method > summary { cursor:pointer; font-size:14px; font-weight:600; }
.cbt-preview .writing-reference { margin-top:20px; padding:20px; border:1px solid var(--separator); border-radius:var(--r-md); }
.cbt-error { color:var(--danger, #bc3540); font-size:13px; line-height:1.6; }
.cbt-records { margin-top:20px; }
.cbt-record { display:flex; align-items:center; justify-content:space-between; gap:20px; padding:20px 0; border-bottom:1px solid var(--separator); }
.cbt-record:last-child { border:0; padding-bottom:0; }
.cbt-record p,.cbt-record small { color:var(--text-2); font-size:13px; line-height:1.7; margin:6px 0; }
.cbt-confirm { display:flex; align-items:flex-start; gap:10px; font-size:14px; line-height:1.8; margin:18px 0; }
.cbt-confirm input { margin-top:6px; }
.cbt-normalized-text, .cbt-source-text, .cbt-response-text { white-space:pre-wrap; overflow-wrap:anywhere; font:15px/1.85 var(--font-ui); }
.cbt-normalized-text { max-height:330px; overflow:auto; padding:20px; background:var(--surface-2); border-radius:var(--r-md); }
.cbt-response { padding:16px 0 24px; }
.cbt-response+.cbt-response { border-top:1px solid var(--separator); }
.cbt-response-text { padding:22px; background:var(--surface-2); border-radius:var(--r-md); min-height:80px; }
.cbt-review-metrics .metric-grid>div { display:flex; flex-direction:column; gap:8px; min-width:0; }
.cbt-review-metrics .metric-grid span { font-size:12px; color:var(--text-2); }
.cbt-review-metrics .metric-grid strong { font-size:26px; font-variant-numeric:tabular-nums; }
.cbt-review .section-header>span { color:var(--text-2); font-size:13px; }
.cbt-timeline-totals { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:20px; margin:22px 0; }
.cbt-timeline-totals>div { display:flex; flex-direction:column; gap:8px; padding:18px; background:var(--surface-2); border-radius:var(--r-md); }
.cbt-timeline-totals span { display:flex; gap:9px; align-items:center; font-size:13px; }
.cbt-timeline-totals strong { font-size:26px; font-variant-numeric:tabular-nums; }
.cbt-timeline-totals small { color:var(--text-2); }
.cbt-dot { display:inline-block; width:12px; height:12px; border-radius:3px; flex-shrink:0; }
.cbt-writing { background:#1069ea; }
.cbt-pausing { background:#a2aec2; }
.cbt-editing { background:repeating-linear-gradient(45deg,#375574,#375574 4px,#7194b6 4px,#7194b6 7px); }
.cbt-timeline-chart { position:relative; height:36px; background:var(--surface-2); border-radius:5px; overflow:hidden; }
.cbt-timeline-segment { display:block; position:absolute; top:0; height:100%; min-width:0; }
.cbt-timeline-axis { display:flex; justify-content:space-between; margin-top:8px; color:var(--text-2); font:12px var(--font-mono); }
.cbt-method { margin-top:20px; color:var(--text-2); font-size:13px; line-height:1.75; }
.cbt-method p { max-width:90ch; }
.cbt-interval-scroll { overflow:auto; max-height:300px; margin-top:12px; }
.cbt-analysis .section-header { margin-bottom:20px; }
.home-write-entry { display:flex; justify-content:space-between; align-items:center; gap:24px; }
.home-write-entry p { color:var(--text-2); line-height:1.7; }
.home-write-entry .btn { flex-shrink:0; }
.cbt-session-shell { min-height:100%; background:var(--bg); }
.cbt-toolbar { position:sticky; top:0; z-index:20; display:grid; grid-template-columns:1fr auto 1fr; align-items:center; gap:16px; padding:14px max(24px,calc((100vw - 1480px) / 2)); background:var(--surface); border-bottom:1px solid var(--separator); }
.cbt-toolbar>.btn { justify-self:start; }
.cbt-toolbar-actions { display:flex; gap:10px; align-items:center; justify-self:end; }
.cbt-clock { text-align:center; display:flex; flex-direction:column; gap:2px; line-height:1.3; }
.cbt-clock small { color:var(--text-2); font-size:11px; }
.cbt-clock strong { font-family:var(--font-mono); font-size:25px; font-variant-numeric:tabular-nums; }
.cbt-strict-badge { font-size:11px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color:var(--text-2); }
.cbt-session-main { max-width:1480px; padding:24px 32px 32px; margin:auto; }
.cbt-session-heading { display:flex; align-items:center; justify-content:space-between; gap:20px; margin:0 0 18px; }
.cbt-session-heading h2 { font-size:21px; line-height:1.4; margin:6px 0 0; }
.cbt-session-heading>.btn { flex-shrink:0; }
.cbt-task-tabs { display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin:12px 0 20px; }
.cbt-task-tabs .btn[aria-pressed=true] { border-color:var(--accent); background:var(--accent-soft); color:var(--accent); }
.cbt-task-tabs small { font-size:12px; color:var(--text-2); }
.cbt-workspace { display:grid; grid-template-columns:minmax(0,0.92fr) minmax(0,1.2fr); gap:24px; align-items:start; }
.cbt-workspace.is-reference-hidden { grid-template-columns:minmax(0,1fr); }
.cbt-reference-pane { max-height:calc(100dvh - 215px); overflow:auto; padding:24px; background:var(--surface); border:1px solid var(--separator); border-radius:var(--r-lg); min-width:0; }
.cbt-reference-pane.writing-reference { display:flex; flex-direction:column; }
.cbt-reference-pane .writing-reference-note { margin-top:20px; padding-top:14px; border-top:1px solid var(--separator); font-size:11px; }
.cbt-reference-pane .writing-prompt { font-size:15px; line-height:1.85; }
.cbt-editor-pane { min-width:0; padding:24px; border:1px solid var(--separator); background:var(--surface); border-radius:var(--r-lg); }
.cbt-editor-slot>label, .cbt-editor-pane>label { display:block; margin:0 0 10px; font-size:14px; font-weight:600; }
.cbt-answer { display:block; width:100%; height:clamp(290px,calc(100dvh - 400px),650px); resize:vertical; color:var(--text); background:var(--surface); padding:18px; font:16px/1.9 var(--font-ui); border:1px solid var(--separator-strong); border-radius:var(--r-sm); tab-size:4; }
.cbt-answer:focus { outline:2px solid var(--focus); outline-offset:2px; }
.cbt-editor-meta { display:flex; align-items:center; justify-content:space-between; gap:16px; margin-top:14px; font-size:13px; }
#cbt-save-status { text-align:right; color:var(--text-2); font-size:12px; }
#cbt-save-status.cbt-error { color:var(--danger,#bc3540); font-weight:600; }
.cbt-custom-progress { white-space:pre-wrap; overflow-wrap:anywhere; padding:20px 0; font:22px/1.9 var(--font-mono); max-height:380px; overflow:auto; }
.cbt-custom-progress .is-correct { color:var(--text-2); }
.cbt-custom-progress .is-incorrect { color:var(--danger,#bc3540); text-decoration:underline; }
.cbt-custom-progress .is-current { background:var(--accent-soft); outline:2px solid var(--accent); }
.cbt-custom-capture { width:100%; padding:12px; background:var(--surface-2); color:var(--text); font:14px/1.6 var(--font-ui); border:1px solid var(--separator-strong); border-radius:var(--r-sm); resize:vertical; }
.cbt-session-notice { display:flex; flex-direction:column; align-items:center; gap:8px; padding:18px 22px; border:1px solid var(--warning); border-radius:var(--r-md); background:var(--warning-soft,var(--surface-2)); text-align:center; margin:0 0 20px; }
.cbt-session-notice strong { font-size:16px; line-height:1.6; max-width:70ch; }
.cbt-session-notice p { margin:0; }
.cbt-dialog-actions { display:flex; flex-direction:column; gap:12px; margin-top:24px; }
.cbt-session-layer .cbt-exit-backdrop { z-index:100; }
.cbt-session-layer [hidden],.cbt-setup [hidden] { display:none!important; }
.cbt-setup button:focus-visible,.cbt-review button:focus-visible,.cbt-session-layer button:focus-visible,.cbt-session-layer summary:focus-visible,.cbt-method summary:focus-visible { outline:3px solid var(--focus); outline-offset:3px; }
@media(max-width:900px){
 .cbt-workspace { grid-template-columns:minmax(0,1fr); }
 .cbt-reference-pane { max-height:380px; }
 .cbt-session-main { padding:20px; }
 .cbt-answer { height:400px; }
 .cbt-toolbar { padding:12px 20px; }
}
@media(max-width:640px){
 .nav-list { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); }
 .cbt-mode-cards { grid-template-columns:minmax(0,1fr); }
 .cbt-record,.home-write-entry { flex-direction:column; align-items:stretch; }
 .cbt-session-main { padding:14px; }
 .cbt-toolbar { gap:8px; padding:10px; grid-template-columns:auto minmax(70px,1fr) auto; }
 .cbt-toolbar .btn { padding:9px 10px; font-size:12px; min-width:0; }
 .cbt-toolbar-actions { gap:6px; }
 .cbt-clock strong { font-size:21px; }
 .cbt-session-heading { flex-direction:column; align-items:flex-start; }
 .cbt-editor-pane,.cbt-reference-pane { padding:16px; }
 .cbt-editor-meta { align-items:flex-start; }
 .cbt-timeline-totals { gap:8px; }
 .cbt-timeline-totals>div { padding:12px 8px; }
 .cbt-timeline-totals strong { font-size:22px; }
 .cbt-timeline-totals span { gap:5px; font-size:11px; }
 .cbt-review .section-header { flex-direction:column; align-items:flex-start; }
 .cbt-session-notice { padding:14px; }
}
@media(prefers-reduced-motion:reduce){.cbt-session-layer *, .cbt-setup *, .cbt-review * { scroll-behavior:auto; transition:none; }}

.cbt-form { grid-template-columns:repeat(2,minmax(0,1fr)); }
.cbt-form .field { min-width:0; }
.cbt-form select { max-width:100%; width:100%; min-width:0; text-overflow:ellipsis; }
@media(max-width:760px){ .cbt-form { grid-template-columns:minmax(0,1fr); } }

.cbt-review-metrics .metric-grid>div { padding:18px; overflow-wrap:anywhere; }
.cbt-review-metrics .metric-grid strong { line-height:1.3; }
.cbt-review-metrics .metric-grid span { line-height:1.6; }