:root {
  color-scheme: light;
  font-family: "Yu Gothic UI", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", system-ui, sans-serif;
  color: #202431;
  background: #f1ede4;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --ink: #202431;
  --muted: #6b6c73;
  --paper: #fffdf8;
  --paper-deep: #f8f4ea;
  --blue: #3858d4;
  --blue-dark: #243b93;
  --coral: #e76151;
  --mint: #52a889;
  --yellow: #e9b949;
  --line: rgb(32 36 49 / 13%);
  --shadow: 0 1.4rem 4rem rgb(54 45 29 / 11%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 8% 4%, rgb(56 88 212 / 10%), transparent 25rem),
    radial-gradient(circle at 93% 20%, rgb(231 97 81 / 9%), transparent 26rem),
    linear-gradient(90deg, transparent 49.8%, rgb(32 36 49 / 2%) 50%, transparent 50.2%), #f1ede4;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  background-image: radial-gradient(rgb(32 36 49 / 7%) 0.7px, transparent 0.7px);
  background-size: 13px 13px;
  content: "";
  opacity: 0.34;
  pointer-events: none;
}

a {
  color: inherit;
}

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

button {
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.62;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  z-index: 20;
  inset: 0 auto auto 0;
  padding: 0.75rem 1rem;
  color: white;
  background: var(--ink);
  transform: translateY(-110%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
footer,
main {
  width: min(76rem, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header,
footer,
.site-header nav,
.brand,
.home-heading,
.panel-heading,
.form-bottom,
.preview-top,
.sheet-rule,
.map-labels,
.practice-heading,
.practice-card-heading,
.typing-toolbar,
.result-celebration,
.result-actions,
.owner-heading,
.owner-actions,
.attempt-identity,
.attempt-numbers,
.dialog-heading {
  display: flex;
  align-items: center;
}

.site-header {
  min-height: 4.4rem;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.site-header nav {
  gap: 1.15rem;
  font-size: 0.82rem;
  font-weight: 700;
}

.site-header nav a {
  text-decoration: none;
}

.brand {
  gap: 0.72rem;
  font-size: 1.02rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 1.7rem;
  padding: 0.25rem;
  align-items: end;
  background: var(--ink);
  border-radius: 0.43rem;
  box-shadow: 0.18rem 0.18rem 0 var(--yellow);
  grid-template-columns: repeat(4, 1fr);
  gap: 0.12rem;
  transform: rotate(-2deg);
}

.brand-mark i {
  display: block;
  height: 36%;
  background: white;
  border-radius: 0.08rem;
}

.brand-mark i:nth-child(2) {
  height: 66%;
  background: #8ca3ff;
}

.brand-mark i:nth-child(3) {
  height: 46%;
  background: #f09084;
}

.brand-mark i:nth-child(4) {
  height: 88%;
  background: #74c8aa;
}

.nav-cta {
  min-height: 2.45rem;
  padding: 0.58rem 0.9rem;
  color: white;
  background: var(--ink);
  border-radius: 0.55rem;
}

.home-shell,
.practice-shell,
.owner-shell {
  padding-block: 1.7rem 4rem;
}

.home-heading {
  min-height: 5.4rem;
  padding: 0.2rem 0.15rem 1.25rem;
  justify-content: space-between;
  gap: 2rem;
}

.home-heading > p {
  max-width: 29rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.75;
}

.eyebrow,
.panel-kicker,
.preview-top p,
.map-labels {
  margin: 0 0 0.35rem;
  color: var(--blue);
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  max-width: 48rem;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.04em;
}

h1 {
  font-size: clamp(1.5rem, 2.4vw, 2.05rem);
  line-height: 1.2;
}

h2 {
  font-size: 1rem;
}

h3 {
  font-size: 0.86rem;
}

.builder-workspace {
  display: grid;
  overflow: hidden;
  min-height: 39rem;
  background: rgb(255 253 248 / 92%);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
  grid-template-columns: minmax(20rem, 0.83fr) minmax(0, 1.17fr);
}

.builder-panel,
.trace-preview {
  min-width: 0;
  padding: clamp(1.2rem, 2.5vw, 1.9rem);
}

.builder-panel {
  display: flex;
  gap: 1.15rem;
  flex-direction: column;
  background: var(--paper);
  border-right: 1px solid var(--line);
}

.panel-heading {
  min-height: 2.2rem;
  justify-content: space-between;
  gap: 1rem;
}

.panel-heading .panel-kicker {
  margin-bottom: 0.25rem;
}

.privacy-chip,
.preview-top > span {
  display: inline-flex;
  min-height: 1.8rem;
  padding-inline: 0.7rem;
  align-items: center;
  color: #3b5d4e;
  background: #e7f3ec;
  border: 1px solid #c8e1d4;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 850;
}

.field-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 7rem;
  gap: 0.75rem;
}

.field {
  display: grid;
  gap: 0.45rem;
  color: #4e5059;
  font-size: 0.75rem;
  font-weight: 850;
}

.field small {
  color: #85858b;
  font-size: 0.67rem;
  font-weight: 650;
}

input,
select,
textarea {
  width: 100%;
  color: var(--ink);
  background: white;
  border: 1px solid #cfd0d4;
  border-radius: 0.64rem;
}

input,
select {
  min-height: 2.8rem;
  padding: 0.65rem 0.78rem;
}

textarea {
  padding: 0.82rem;
  resize: vertical;
  line-height: 1.7;
}

input::placeholder,
textarea::placeholder {
  color: #98989c;
}

fieldset {
  padding: 0;
  margin: 0;
  border: 0;
}

legend {
  margin-bottom: 0.5rem;
  color: #4e5059;
  font-size: 0.75rem;
  font-weight: 850;
}

.mode-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.mode-row label {
  position: relative;
  display: grid;
  min-height: 3.8rem;
  padding: 0.55rem 0.65rem;
  grid-template-columns: auto 1fr;
  align-content: center;
  align-items: center;
  background: white;
  border: 1px solid #cfd0d4;
  border-radius: 0.65rem;
  cursor: pointer;
  gap: 0.55rem;
}

.mode-row input {
  position: absolute;
  opacity: 0;
}

.mode-row label:has(input:checked) {
  background: #eef1ff;
  border-color: var(--blue);
  box-shadow: inset 0 0 0 1px var(--blue);
}

.mode-row span {
  display: grid;
  min-width: 2rem;
  height: 2rem;
  padding-inline: 0.3rem;
  place-items: center;
  color: white;
  background: var(--ink);
  border-radius: 0.36rem;
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 0.72rem;
  font-weight: 800;
}

.mode-row b {
  font-size: 0.68rem;
}

.task-field textarea {
  min-height: 10rem;
  font-family: "BIZ UDPGothic", "Yu Gothic UI", system-ui, sans-serif;
  font-size: 0.88rem;
}

.honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

.form-bottom {
  justify-content: space-between;
  gap: 1rem;
}

.form-bottom p {
  max-width: 18rem;
  margin: 0;
  color: #77787e;
  font-size: 0.65rem;
  line-height: 1.55;
}

.button {
  display: inline-flex;
  min-height: 2.75rem;
  padding-inline: 1rem;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  border: 1px solid var(--ink);
  border-radius: 0.62rem;
  font-size: 0.76rem;
  font-weight: 900;
  text-decoration: none;
}

.primary {
  color: white;
  background: var(--ink);
}

.primary:hover {
  background: #303746;
}

.secondary {
  color: var(--ink);
  background: white;
  border-color: #bfc1c7;
}

.form-message {
  min-height: 1.1rem;
  margin: 0;
  color: #ad3c31;
  font-size: 0.72rem;
  font-weight: 750;
}

.trace-preview {
  display: grid;
  position: relative;
  overflow: hidden;
  min-height: 39rem;
  gap: 1.1rem;
  align-content: start;
  background:
    linear-gradient(rgb(255 255 255 / 26%), rgb(255 255 255 / 26%)),
    repeating-linear-gradient(0deg, transparent, transparent 31px, rgb(32 36 49 / 4%) 32px), #e8e5dc;
}

.trace-preview::before {
  position: absolute;
  width: 6rem;
  height: 6rem;
  inset: -2.8rem -2rem auto auto;
  background: var(--coral);
  border-radius: 50%;
  content: "";
  opacity: 0.72;
}

.preview-top {
  position: relative;
  z-index: 1;
  justify-content: space-between;
  gap: 1rem;
}

.preview-top p {
  color: #696b74;
}

.preview-top strong {
  display: block;
  max-width: 24rem;
  overflow: hidden;
  font-size: 0.95rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.typing-sheet {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--paper);
  border: 1px solid rgb(32 36 49 / 14%);
  border-radius: 0.9rem;
  box-shadow: 0 0.9rem 2.3rem rgb(51 44 31 / 10%);
}

.typing-sheet::before {
  position: absolute;
  width: 0.62rem;
  inset: 0.8rem auto 0.8rem 0.7rem;
  background: repeating-linear-gradient(
    180deg,
    var(--blue) 0 0.9rem,
    transparent 0.9rem 1.35rem,
    var(--coral) 1.35rem 2.25rem,
    transparent 2.25rem 2.7rem
  );
  border-radius: 999px;
  content: "";
  opacity: 0.75;
}

.sheet-rule {
  justify-content: space-between;
  color: #7a7b82;
  font-size: 0.64rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.demo-line {
  min-height: 7.5rem;
  margin: 1.25rem 0 1rem;
  color: #8b8b8f;
  font-family: "BIZ UDPGothic", "Yu Gothic UI", sans-serif;
  font-size: clamp(1rem, 2vw, 1.24rem);
  line-height: 2.05;
}

.demo-line .typed {
  color: var(--ink);
}

.demo-line .stumble {
  padding: 0.12rem 0.22rem;
  color: #b63e33;
  background: #ffe5df;
  border-radius: 0.25rem;
}

.demo-line .cursor {
  position: relative;
  color: var(--ink);
}

.demo-line .cursor::after {
  position: absolute;
  width: 2px;
  inset: -0.1rem -0.14rem -0.1rem auto;
  background: var(--blue);
  content: "";
}

.progress-track {
  overflow: hidden;
  height: 0.42rem;
  background: #e3e2df;
  border-radius: 999px;
}

.progress-track span {
  display: block;
  width: 76%;
  height: 100%;
  background: linear-gradient(90deg, var(--blue), #7892ff);
  border-radius: inherit;
  transition: width 160ms ease;
}

.trace-map {
  position: relative;
  min-height: 10rem;
  padding: 1rem 1.1rem 0.8rem;
  background: #272d3a;
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: 0.9rem;
  box-shadow: 0 1rem 2.2rem rgb(32 36 49 / 15%);
}

.map-labels {
  justify-content: space-between;
  color: #aeb6ce;
  font-size: 0.54rem;
}

.bar-field {
  display: flex;
  height: 6.4rem;
  margin-top: 0.45rem;
  align-items: end;
  justify-content: stretch;
  gap: 0.38rem;
}

.bar-field i {
  display: block;
  width: 100%;
  height: var(--height);
  min-height: 0.28rem;
  background: linear-gradient(180deg, #8ca4ff, #405ac8);
  border-radius: 0.18rem 0.18rem 0 0;
}

.bar-field .bar-error {
  background: linear-gradient(180deg, #f6a196, var(--coral));
}

.map-axis {
  height: 1px;
  background: rgb(255 255 255 / 24%);
}

.preview-stats {
  display: grid;
  grid-template-columns: 0.82fr 0.9fr 1.35fr;
  gap: 0.72rem;
}

.preview-stats > div {
  min-width: 0;
  padding: 0.8rem 0.9rem;
  background: rgb(255 253 248 / 80%);
  border: 1px solid var(--line);
  border-radius: 0.72rem;
}

.preview-stats strong {
  display: block;
  font-size: 1.18rem;
  letter-spacing: -0.04em;
}

.preview-stats span {
  color: #74757b;
  font-size: 0.61rem;
  font-weight: 750;
}

.hotspot-card div {
  display: flex;
  margin-top: 0.3rem;
  gap: 0.3rem;
}

.hotspot-card b {
  display: grid;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  color: #a33d33;
  background: #ffe4df;
  border-radius: 0.3rem;
  font-size: 0.72rem;
}

.practice-heading,
.owner-heading {
  min-height: 6rem;
  padding: 0.2rem 0.1rem 1.35rem;
  justify-content: space-between;
  gap: 2rem;
}

.practice-heading > div:first-child > p:last-child,
.owner-heading > div:first-child > p:last-child {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.75rem;
}

.lesson-token {
  max-width: 23rem;
  padding: 0.8rem 1rem;
  background: rgb(255 253 248 / 75%);
  border: 1px solid var(--line);
  border-left: 0.32rem solid var(--yellow);
  border-radius: 0.55rem;
}

.lesson-token span,
.lesson-token strong {
  display: block;
}

.lesson-token span {
  margin-bottom: 0.22rem;
  color: #7b7c82;
  font-size: 0.61rem;
  font-weight: 800;
}

.lesson-token strong {
  font-size: 0.78rem;
}

.practice-stage {
  display: grid;
  overflow: hidden;
  min-height: 35rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 1.15rem;
  box-shadow: var(--shadow);
  grid-template-columns: minmax(0, 1fr) 18rem;
}

.practice-card,
.typing-room,
.result-room {
  display: flex;
  max-width: 43rem;
  min-height: 35rem;
  padding: clamp(1.4rem, 4vw, 3rem);
  justify-content: center;
  gap: 1.25rem;
  flex-direction: column;
}

.practice-card {
  margin-inline: auto;
}

.practice-card > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.83rem;
  line-height: 1.75;
}

.practice-card-heading {
  gap: 1rem;
}

.step-number {
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  color: white;
  background: var(--blue);
  border-radius: 0.75rem;
  font-family: ui-monospace, monospace;
  font-weight: 850;
}

.code-field {
  max-width: 20rem;
}

.code-field input {
  min-height: 3.25rem;
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.practice-card .button {
  width: fit-content;
}

.lesson-side {
  display: flex;
  position: relative;
  padding: 2rem 1.45rem;
  justify-content: space-between;
  gap: 1.5rem;
  flex-direction: column;
  color: white;
  background:
    linear-gradient(rgb(39 45 58 / 94%), rgb(39 45 58 / 94%)),
    repeating-linear-gradient(0deg, transparent, transparent 23px, rgb(255 255 255 / 5%) 24px);
}

.lesson-side h2 {
  margin-bottom: 0.8rem;
  font-size: 1.1rem;
}

.lesson-side p:not(.panel-kicker) {
  margin: 0;
  color: #c2c7d3;
  font-size: 0.76rem;
  line-height: 1.75;
}

.lesson-side .panel-kicker {
  color: #93a7ff;
}

.lesson-ruler {
  display: flex;
  height: 13rem;
  align-items: end;
  gap: 0.45rem;
}

.lesson-ruler i {
  display: block;
  width: 100%;
  height: 22%;
  background: #566074;
  border-radius: 0.18rem 0.18rem 0 0;
}

.lesson-ruler i:nth-child(2) {
  height: 41%;
}

.lesson-ruler i:nth-child(3) {
  height: 57%;
}

.lesson-ruler i:nth-child(4) {
  height: 45%;
}

.lesson-ruler i:nth-child(5) {
  height: 72%;
}

.lesson-ruler i:nth-child(6) {
  height: 84%;
}

.lesson-ruler i:nth-child(7) {
  height: 100%;
}

.lesson-ruler i.active {
  background: var(--coral);
}

.text-button,
.quiet-button,
.danger-button {
  padding: 0;
  background: transparent;
  border: 0;
  font-weight: 800;
}

.text-button {
  align-self: flex-start;
  color: #d2d7e0;
  font-size: 0.7rem;
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

.typing-room {
  max-width: none;
  padding: clamp(1rem, 2.6vw, 2rem);
  justify-content: flex-start;
}

.typing-toolbar {
  min-height: 2.8rem;
  justify-content: flex-start;
  gap: 2rem;
}

.typing-toolbar div {
  display: grid;
}

.typing-toolbar span {
  color: #818289;
  font-size: 0.61rem;
  font-weight: 800;
}

.typing-toolbar strong {
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 0.88rem;
}

.quiet-button {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.7rem;
}

.target-panel {
  position: relative;
  overflow: auto;
  max-height: 12rem;
  padding: 1.1rem 1.25rem;
  background: #f3f1eb;
  border: 1px solid var(--line);
  border-radius: 0.78rem;
}

.target-label {
  margin: 0 0 0.7rem;
  color: #77787f;
  font-size: 0.62rem;
  font-weight: 850;
}

.target-panel pre {
  margin: 0;
  color: #343740;
  font-family: "BIZ UDPGothic", "Yu Gothic UI", system-ui, sans-serif;
  font-size: 0.88rem;
  line-height: 1.85;
  white-space: pre-wrap;
  word-break: break-word;
}

.typing-input textarea {
  min-height: 11rem;
  background: white;
  border-width: 2px;
  font-family: "BIZ UDPGothic", "Yu Gothic UI", system-ui, sans-serif;
  font-size: 0.92rem;
}

.typing-input textarea[aria-invalid="true"] {
  background: #fff8f6;
  border-color: var(--coral);
}

.live-status p {
  min-height: 1.15rem;
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: 0.69rem;
}

.result-room {
  max-width: none;
  justify-content: flex-start;
}

.result-celebration {
  gap: 0.9rem;
}

.result-celebration > span {
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  color: white;
  background: var(--mint);
  border-radius: 50%;
  font-weight: 900;
}

.result-stats,
.owner-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: 0.8rem;
}

.result-stats > div,
.owner-summary > div {
  padding: 1rem 1.1rem;
}

.result-stats > div + div,
.owner-summary > div + div {
  border-left: 1px solid var(--line);
}

.result-stats strong,
.result-stats span,
.owner-summary strong,
.owner-summary span {
  display: block;
}

.result-stats strong,
.owner-summary strong {
  font-size: 1.28rem;
  letter-spacing: -0.04em;
}

.result-stats span,
.owner-summary span {
  margin-top: 0.18rem;
  color: #77787e;
  font-size: 0.61rem;
  font-weight: 750;
}

.result-graph {
  padding: 1rem;
  color: white;
  background: #272d3a;
  border-radius: 0.78rem;
}

.result-graph .panel-heading span {
  color: #aeb5c5;
  font-size: 0.62rem;
}

.result-bars {
  height: 7rem;
}

.result-hotspots h3 {
  margin-bottom: 0.6rem;
}

.result-hotspots > div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.result-hotspots span {
  display: inline-flex;
  min-height: 2rem;
  padding-inline: 0.65rem;
  align-items: center;
  color: #a33d33;
  background: #ffe7e2;
  border: 1px solid #f4c7c0;
  border-radius: 0.45rem;
  font-size: 0.7rem;
  font-weight: 850;
}

.result-hotspots .clean-run {
  color: #376b58;
  background: #e6f4ed;
  border-color: #c8e4d8;
}

.result-actions {
  flex-wrap: wrap;
  gap: 0.6rem;
}

.report-dialog {
  width: min(27rem, calc(100% - 2rem));
  padding: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  box-shadow: 0 2rem 5rem rgb(32 36 49 / 25%);
}

.report-dialog::backdrop {
  background: rgb(32 36 49 / 62%);
  backdrop-filter: blur(3px);
}

.report-dialog form {
  display: grid;
  padding: 1.4rem;
  gap: 0.8rem;
}

.dialog-heading {
  justify-content: space-between;
}

.dialog-heading button {
  width: 2rem;
  height: 2rem;
  background: white;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.report-dialog p {
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.6;
}

.report-dialog label {
  display: flex;
  min-height: 2.4rem;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.76rem;
}

.report-dialog input {
  width: auto;
  min-height: 0;
}

.owner-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.6rem;
}

.owner-summary {
  margin-bottom: 1rem;
  background: rgb(255 253 248 / 84%);
  grid-template-columns: repeat(4, 1fr);
}

.owner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(16rem, 0.55fr);
  gap: 1rem;
}

.owner-panel {
  min-width: 0;
  padding: clamp(1.15rem, 2.4vw, 1.7rem);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: 0 1rem 2.6rem rgb(51 44 31 / 7%);
}

.owner-panel .panel-heading > span {
  color: var(--muted);
  font-size: 0.62rem;
}

.attempt-list {
  display: grid;
  margin-top: 1.2rem;
  gap: 0.5rem;
}

.empty-state {
  margin: 2rem 0;
  color: #8a8a8f;
  font-size: 0.78rem;
  text-align: center;
}

.attempt-row {
  display: grid;
  min-height: 4rem;
  padding: 0.7rem 0.8rem;
  align-items: center;
  background: #faf8f2;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  grid-template-columns: 7rem minmax(4rem, 1fr) 7rem 5.5rem;
  gap: 0.8rem;
}

.attempt-identity {
  min-width: 0;
  align-items: flex-start;
  flex-direction: column;
}

.attempt-identity strong {
  max-width: 100%;
  overflow: hidden;
  font-family: ui-monospace, "Cascadia Mono", monospace;
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.attempt-identity span,
.attempt-corrections {
  color: #85868b;
  font-size: 0.58rem;
}

.attempt-line {
  overflow: hidden;
  height: 0.55rem;
  background: #e5e4e0;
  border-radius: 999px;
}

.attempt-line i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--blue), #83a0ff);
  border-radius: inherit;
}

.attempt-numbers {
  justify-content: flex-end;
  gap: 0.25rem;
}

.attempt-numbers strong {
  font-size: 1rem;
}

.attempt-numbers span {
  color: #77787d;
  font-size: 0.55rem;
}

.attempt-numbers b {
  margin-left: 0.4rem;
  color: #35705a;
  font-size: 0.66rem;
}

.attempt-corrections {
  text-align: right;
}

.owner-controls {
  display: flex;
  gap: 1rem;
  flex-direction: column;
}

.owner-controls > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.69rem;
  line-height: 1.65;
}

.share-strip {
  padding: 0.75rem;
  background: #f0eee8;
  border-radius: 0.6rem;
}

.share-strip span,
.share-strip code {
  display: block;
}

.share-strip span {
  margin-bottom: 0.3rem;
  color: #77787e;
  font-size: 0.6rem;
  font-weight: 800;
}

.share-strip code {
  overflow: hidden;
  font-size: 0.65rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.danger-button {
  align-self: flex-start;
  color: #b13f35;
  font-size: 0.7rem;
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

.prose {
  margin-block: 2.5rem 5rem;
  padding: clamp(1.4rem, 4vw, 2.8rem);
  background: rgb(255 253 248 / 85%);
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: 0 1.2rem 3rem rgb(51 44 31 / 7%);
}

.prose > h1 {
  margin-bottom: 1.6rem;
}

.prose section + section {
  margin-top: 1.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}

.prose p {
  color: #5e6068;
  font-size: 0.86rem;
  line-height: 1.9;
}

.guide-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.guide-steps section {
  padding: 1rem;
  background: #f4f1e9;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
}

.guide-steps section + section {
  margin: 0;
  padding-top: 1rem;
}

.guide-steps span {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  margin-bottom: 0.75rem;
  place-items: center;
  color: white;
  background: var(--blue);
  border-radius: 0.45rem;
  font-family: ui-monospace, monospace;
  font-size: 0.68rem;
  font-weight: 900;
}

.guide-steps p {
  margin-bottom: 0;
  font-size: 0.76rem;
}

.boundary-note {
  margin-top: 1.4rem;
  padding: 1.15rem;
  background: #fff5dc;
  border: 1px solid #ead7a2;
  border-radius: 0.7rem;
}

.not-found .button {
  margin-top: 0.8rem;
}

footer {
  min-height: 5.5rem;
  justify-content: space-between;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
}

footer nav {
  display: flex;
  gap: 1rem;
}

.button:focus-visible,
.text-button:focus-visible,
.quiet-button:focus-visible,
.danger-button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.mode-row label:has(input:focus-visible) {
  outline: 3px solid var(--yellow);
  outline-offset: 3px;
}

@media (max-width: 58rem) {
  .builder-workspace,
  .practice-stage,
  .owner-grid {
    grid-template-columns: 1fr;
  }

  .builder-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .trace-preview {
    min-height: 34rem;
  }

  .lesson-side {
    min-height: 15rem;
    display: grid;
    grid-template-columns: 10rem 1fr;
  }

  .lesson-ruler {
    height: 9rem;
    grid-row: span 2;
  }

  .text-button {
    grid-column: 2;
  }
}

@media (max-width: 42rem) {
  .site-header,
  footer,
  main {
    width: min(100% - 1rem, 76rem);
  }

  .site-header nav > a:first-child {
    display: none;
  }

  .home-heading,
  .practice-heading,
  .owner-heading {
    min-height: 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.7rem;
  }

  .home-heading > p {
    font-size: 0.8rem;
  }

  .builder-workspace {
    border-radius: 0.85rem;
  }

  .builder-panel,
  .trace-preview {
    padding: 1rem;
  }

  .field-grid,
  .mode-row,
  .preview-stats,
  .result-stats,
  .owner-summary,
  .guide-steps {
    grid-template-columns: 1fr;
  }

  .mode-row {
    grid-template-columns: repeat(3, 1fr);
  }

  .mode-row label {
    min-height: 4.5rem;
    padding: 0.45rem;
    justify-items: center;
    grid-template-columns: 1fr;
    gap: 0.32rem;
  }

  .mode-row b {
    text-align: center;
  }

  .form-bottom {
    align-items: stretch;
    flex-direction: column;
  }

  .form-bottom p {
    max-width: none;
  }

  .trace-preview {
    min-height: 30rem;
  }

  .demo-line {
    min-height: 6.5rem;
    font-size: 0.92rem;
  }

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

  .hotspot-card {
    grid-column: 1 / -1;
  }

  .practice-card,
  .typing-room,
  .result-room {
    min-height: 29rem;
    padding: 1rem;
  }

  .lesson-side {
    display: flex;
    min-height: 18rem;
  }

  .lesson-ruler {
    width: 100%;
    height: 7rem;
  }

  .text-button {
    grid-column: auto;
  }

  .typing-toolbar {
    gap: 1rem;
  }

  .result-stats > div + div,
  .owner-summary > div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

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

  .owner-summary > div:nth-child(3) {
    border-left: 0;
  }

  .owner-actions {
    width: 100%;
    justify-content: stretch;
  }

  .owner-actions .button {
    flex: 1;
  }

  .attempt-row {
    grid-template-columns: 1fr 4rem;
  }

  .attempt-line {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .attempt-numbers {
    grid-column: 2;
    grid-row: 1;
  }

  .attempt-corrections {
    grid-column: 1 / -1;
    grid-row: 3;
    text-align: left;
  }

  footer {
    padding-block: 1.3rem;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition-duration: 0.001ms !important;
  }
}

@media print {
  .site-header,
  footer,
  .lesson-side {
    display: none;
  }
}