:root {
  --paper: #f3efe6;
  --paper-strong: #fbf8f1;
  --ink: #18221c;
  --ink-soft: #526057;
  --line: #d8d1c2;
  --line-strong: #b8b09f;
  --forest: #173f31;
  --forest-soft: #2e5c49;
  --lime: #d7ff63;
  --lime-soft: #edffc0;
  --warm: #f0a36b;
  --danger: #9f2f2f;
  --danger-bg: #fbe7e2;
  --success: #245e3e;
  --success-bg: #e5f5df;
  --shadow: 0 16px 48px rgba(24, 34, 28, 0.08);
  --radius: 18px;
  --radius-small: 12px;
  --max: 1180px;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(215, 255, 99, 0.24), transparent 28rem),
    linear-gradient(180deg, #f7f3ea 0%, var(--paper) 45%, #efeadd 100%);
  min-height: 100vh;
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--forest);
  text-underline-offset: 0.22em;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid #327a5a;
  outline-offset: 3px;
}

h1,
h2,
h3 {
  line-height: 1.16;
  letter-spacing: -0.025em;
  margin: 0 0 0.6rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 4.1rem);
  font-weight: 760;
}

h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.7rem);
}

p {
  margin: 0 0 1rem;
}

code,
.code-editor {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

.skip-link {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 100;
  background: var(--ink);
  color: white;
  padding: 0.7rem 1rem;
  border-radius: 8px;
}

.skip-link:focus-visible {
  top: 1rem;
}

.site-shell {
  width: min(calc(100% - 2.5rem), var(--max));
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  min-height: 88px;
  display: flex;
  align-items: center;
  gap: 2rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  text-decoration: none;
  flex: 0 0 auto;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 13px 13px 13px 4px;
  background: var(--forest);
  color: var(--lime);
  font-family: Georgia, serif;
  font-weight: 800;
  font-size: 1.35rem;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand strong {
  font-size: 1.08rem;
  letter-spacing: 0.04em;
}

.brand small {
  color: var(--ink-soft);
  font-size: 0.7rem;
  margin-top: 0.24rem;
}

.main-nav {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.main-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  background: rgba(23, 63, 49, 0.09);
  color: var(--forest);
}

.account-menu {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.account-menu form {
  margin: 0;
}

.account-name {
  max-width: 9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ink-soft);
  font-size: 0.86rem;
  text-decoration: none;
}

.account-name:hover {
  color: var(--forest);
  text-decoration: underline;
}

.main-content {
  flex: 1;
  padding: 3.2rem 0 4rem;
}

.site-footer {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.muted {
  color: var(--ink-soft);
}

.eyebrow {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--forest-soft);
  font-size: 0.72rem;
  font-weight: 800;
}

.lede {
  color: var(--ink-soft);
  font-size: clamp(1rem, 2vw, 1.16rem);
  max-width: 48rem;
}

.page-heading,
.lesson-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.page-heading h1,
.lesson-heading h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.72rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  font-weight: 750;
  font-size: 0.92rem;
  transition: transform 150ms ease, background 150ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

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

.button-primary:hover {
  background: var(--forest-soft);
}

.button-secondary {
  border-color: var(--line-strong);
  background: var(--paper-strong);
  color: var(--ink);
}

.button-quiet {
  border-color: transparent;
  background: transparent;
  color: var(--ink-soft);
}

.button-small {
  min-height: 34px;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
}

.button-wide {
  width: 100%;
}

.text-link {
  color: var(--forest);
  font-weight: 700;
  font-size: 0.9rem;
}

.status-chip,
.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.26rem 0.65rem;
  font-size: 0.74rem;
  line-height: 1.3;
  font-weight: 750;
  background: rgba(23, 63, 49, 0.08);
  color: var(--forest);
  white-space: nowrap;
}

.tag-warm {
  background: #fff0df;
  color: #8c4c1a;
}

.tag-quiet {
  background: rgba(24, 34, 28, 0.06);
  color: var(--ink-soft);
}

.status-done {
  background: var(--success-bg) !important;
  color: var(--success) !important;
}

.banner {
  border-radius: var(--radius-small);
  padding: 0.9rem 1.1rem;
  margin: 0 0 1.3rem;
  border: 1px solid var(--line);
  background: var(--paper-strong);
  font-size: 0.9rem;
}

.banner-error {
  border-color: #e7b9ae;
  background: var(--danger-bg);
  color: var(--danger);
}

.banner-success {
  border-color: #b7d8b0;
  background: var(--success-bg);
  color: var(--success);
}

.banner-warning {
  border-color: #e7cda8;
  background: #fff6e4;
  color: #7b4d13;
}

.banner-neutral {
  background: #edf6f1;
  color: var(--forest);
}

.auth-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: clamp(2rem, 7vw, 7rem);
  align-items: center;
  min-height: 65vh;
}

.auth-copy h1 {
  max-width: 12ch;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  display: grid;
  gap: 0.8rem;
}

.feature-list li {
  padding-left: 1.6rem;
  position: relative;
  color: var(--ink-soft);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 3px;
  background: var(--lime);
  box-shadow: inset 0 0 0 2px var(--forest);
}

.auth-card {
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 28px 28px 28px 8px;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--shadow);
}

.auth-card-wide {
  max-width: 600px;
  margin: 0 auto;
}

.narrow-page {
  display: grid;
  place-items: center;
  min-height: 55vh;
}

.stack-form {
  display: grid;
  gap: 1rem;
}

.stack-form label,
.artifact-form label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-soft);
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: #fffdf8;
  color: var(--ink);
  padding: 0.72rem 0.8rem;
  font-weight: 450;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--forest);
  outline: 3px solid rgba(23, 63, 49, 0.12);
}

.field-hint,
.form-hint {
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 450;
  margin: 0.2rem 0 0;
}

.form-hint {
  margin-top: 1.2rem;
}

.start-grid,
.support-grid,
.admin-grid,
.report-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.mode-card {
  padding: 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
}

.mode-card-primary {
  background: var(--forest);
  color: white;
  border-color: var(--forest);
  box-shadow: var(--shadow);
}

.mode-card-primary .eyebrow,
.mode-card-primary .muted {
  color: var(--lime);
}

.mode-card-primary p {
  color: rgba(255, 255, 255, 0.74);
}

.mode-card form {
  margin-top: 1.3rem;
}

.mode-card-primary .button-primary {
  background: var(--lime);
  color: var(--forest);
}

.task-stack {
  display: grid;
  gap: 0.9rem;
}

.task-card {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  align-items: center;
  gap: 1.2rem;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem;
  transition: transform 160ms ease, border-color 160ms ease;
}

.task-card:not(.task-completed):hover {
  transform: translateY(-2px);
  border-color: var(--forest-soft);
}

.task-completed {
  opacity: 0.66;
}

.task-index {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  font-family: Georgia, serif;
  font-size: 1.25rem;
  font-weight: 700;
}

.task-body h2 {
  font-size: 1.22rem;
  margin: 0.25rem 0;
}

.task-body p {
  margin: 0;
  font-size: 0.84rem;
}

.task-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink-soft);
  font-size: 0.76rem;
}

.task-action {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.4rem;
}

.support-grid {
  margin-top: 2.4rem;
}

.support-card {
  display: grid;
  gap: 0.25rem;
  padding: 1.2rem;
  text-decoration: none;
  color: var(--ink);
  border-top: 1px solid var(--line);
}

.support-card span:last-child {
  color: var(--ink-soft);
  font-size: 0.84rem;
}

.empty-state {
  max-width: 660px;
  text-align: center;
  padding: clamp(2rem, 6vw, 5rem);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: rgba(251, 248, 241, 0.7);
}

.compact-empty {
  padding: 2rem;
  text-align: left;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.lesson-heading {
  align-items: flex-end;
}

.lesson-brief {
  max-width: 850px;
  margin-bottom: 1.5rem;
  font-size: 1.03rem;
}

.criteria-list {
  padding-left: 1.2rem;
  margin: 0;
  display: grid;
  gap: 0.4rem;
  color: var(--ink-soft);
}

.practice-panel,
.build-panel,
.report-panel,
.table-panel {
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.2rem, 3vw, 2rem);
  box-shadow: 0 8px 30px rgba(24, 34, 28, 0.035);
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.predict-form fieldset {
  border: 0;
  padding: 0;
  margin: 0;
}

.predict-form legend {
  font-weight: 750;
  margin-bottom: 1rem;
}

.option-card {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  margin-bottom: 0.6rem;
  background: #fffdf8;
  cursor: pointer;
}

.option-card:has(input:checked) {
  border-color: var(--forest);
  background: var(--lime-soft);
}

.option-card input {
  width: auto;
  margin-top: 0.32rem;
}

.option-card code {
  white-space: pre-wrap;
}

.predict-form button {
  margin-top: 1rem;
}

.code-editor {
  width: 100%;
  min-height: 360px;
  padding: 1rem;
  color: #eaf4e8;
  background: #12251c;
  border: 1px solid #2b4939;
  border-radius: var(--radius-small);
  font-size: 0.88rem;
  line-height: 1.55;
  tab-size: 4;
  caret-color: var(--lime);
}

.editor-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.9rem;
}

.editor-actions .muted {
  font-size: 0.76rem;
}

.test-results,
.result-panel {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: #fffdf8;
  padding: 1rem;
}

.result-panel.is-passed {
  border-color: #9fca99;
  background: var(--success-bg);
}

.result-panel.is-failed {
  border-color: #e4b9ae;
  background: var(--danger-bg);
}

.test-summary {
  display: grid;
  gap: 0.2rem;
  margin: 0;
}

.test-summary div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.82rem;
}

.test-summary dt {
  color: var(--ink-soft);
}

.test-summary dd {
  margin: 0;
  font-weight: 700;
}

.test-stdout {
  white-space: pre-wrap;
  overflow: auto;
  max-height: 240px;
  background: #12251c;
  color: #eaf4e8;
  border-radius: 8px;
  padding: 0.7rem;
  font-size: 0.72rem;
}

.test-list {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
  display: grid;
  gap: 0.5rem;
}

.test-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem;
  align-items: start;
  border-top: 1px solid var(--line);
  padding-top: 0.5rem;
  font-size: 0.84rem;
}

.test-badge {
  font-size: 0.7rem;
  font-weight: 800;
  border-radius: 5px;
  padding: 0.1rem 0.4rem;
  background: var(--danger-bg);
  color: var(--danger);
}

.test-item.passed .test-badge {
  background: var(--success-bg);
  color: var(--success);
}

.test-message {
  display: block;
  white-space: pre-wrap;
  font-family: monospace;
  font-size: 0.74rem;
  color: var(--ink-soft);
  margin-top: 0.25rem;
}

.hint-stack {
  margin-top: 1.8rem;
}

.hint-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  padding: 0.8rem 1rem;
  margin-bottom: 0.5rem;
  background: #faf6ed;
}

.hint-card summary {
  cursor: pointer;
  font-weight: 700;
}

.hint-card p {
  margin: 0.7rem 0 0;
  color: var(--ink-soft);
}

.build-panel {
  max-width: 900px;
}

.build-steps {
  display: grid;
  gap: 0.55rem;
  color: var(--ink-soft);
}

.artifact-inline {
  display: grid;
  gap: 0.4rem;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  margin-top: 1.4rem;
}

.track-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.track-card {
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.track-card header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.track-id {
  color: var(--forest-soft);
  font-family: monospace;
  font-size: 0.72rem;
  font-weight: 800;
}

.track-card h2 {
  font-size: 1.16rem;
  margin-top: 0.2rem;
}

.track-score {
  font-size: 1.7rem;
  line-height: 1;
}

.track-score small {
  font-size: 0.65rem;
  color: var(--ink-soft);
  font-weight: 500;
}

.progress-track {
  height: 7px;
  border-radius: 999px;
  background: #e8e2d5;
  overflow: hidden;
  margin: 0.9rem 0 1rem;
}

.progress-track span {
  display: block;
  height: 100%;
  background: var(--forest);
  border-radius: inherit;
}

.node-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.node-card {
  display: grid;
  gap: 0.12rem;
  padding: 0.65rem;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fffdf8;
}

.node-card strong {
  font-size: 0.8rem;
  line-height: 1.35;
}

.node-code,
.node-meta,
.node-deps {
  font-size: 0.67rem;
  color: var(--ink-soft);
}

.node-code {
  font-family: monospace;
  font-weight: 800;
}

.node-deps {
  opacity: 0.72;
}

.node-ready {
  border-color: #a7cba3;
  background: #f2faee;
}

.node-strong {
  border-color: var(--forest);
  background: var(--lime-soft);
}

.node-learning {
  border-color: #d7bf96;
  background: #fffaf0;
}

.node-untrained {
  opacity: 0.58;
}

.explain-panel {
  margin-top: 1.5rem;
  padding: 1.2rem;
  border-left: 3px solid var(--forest);
}

.score-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.2rem;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.score-legend b {
  color: var(--forest);
}

.artifact-list {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.artifact-card {
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.2rem, 3vw, 1.8rem);
}

.artifact-card h2 {
  margin-top: 0.5rem;
}

.artifact-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.78rem;
}

.artifact-nodes {
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.artifact-reflection {
  border-top: 1px solid var(--line);
  margin-top: 1rem;
  padding-top: 0.8rem;
}

.artifact-reflection summary,
.form-drawer > summary {
  cursor: pointer;
  font-weight: 750;
}

.compact-form {
  border-top: 1px solid var(--line);
  margin-top: 1rem;
  padding-top: 1rem;
}

.form-drawer {
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
}

.form-drawer > summary {
  font-size: 1.15rem;
}

.artifact-form {
  margin-top: 1.4rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.span-2 {
  grid-column: 1 / -1;
}

.node-picker {
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  padding: 1rem;
  max-height: 310px;
  overflow: auto;
}

.node-picker legend {
  padding: 0 0.4rem;
  font-weight: 700;
}

.node-check-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
}

.node-check {
  display: flex !important;
  gap: 0.5rem !important;
  align-items: flex-start;
  font-size: 0.78rem !important;
  color: var(--ink) !important;
  padding: 0.45rem;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.node-check input {
  width: auto;
  margin-top: 0.22rem;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.metric-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--paper-strong);
  padding: 1rem;
}

.metric-card > span {
  color: var(--ink-soft);
  font-size: 0.75rem;
}

.metric-card strong {
  display: block;
  font-size: 2rem;
  letter-spacing: -0.04em;
  margin: 0.35rem 0;
}

.metric-card strong small {
  font-size: 0.68rem;
  letter-spacing: 0;
  font-weight: 500;
  color: var(--ink-soft);
}

.metric-card p {
  font-size: 0.72rem;
  color: var(--ink-soft);
  margin: 0;
}

.radar-list {
  display: grid;
  gap: 0.9rem;
}

.radar-row {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.7rem;
  align-items: center;
}

.radar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  gap: 1rem;
}

.radar-row .progress-track {
  margin: 0.35rem 0 0;
}

.review-questions {
  color: var(--ink-soft);
  padding-left: 1.1rem;
  display: grid;
  gap: 0.8rem;
}

.invite-result {
  border: 1px solid #b5d3a8;
  background: var(--lime-soft);
  border-radius: var(--radius);
  padding: 1.4rem;
  margin-bottom: 1rem;
}

.copy-row {
  display: flex;
  gap: 0.5rem;
}

.copy-row input {
  flex: 1;
  min-width: 0;
  font-family: monospace;
  font-size: 0.8rem;
}

.copy-row button {
  flex: 0 0 auto;
  white-space: nowrap;
}

.table-panel {
  margin-top: 1rem;
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

th,
td {
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 0.7rem;
}

th {
  color: var(--ink-soft);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 960px) {
  .site-header {
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.8rem 0;
  }

  .account-menu {
    margin-left: auto;
  }

  .main-nav {
    order: 3;
    width: 100%;
    border-top: 1px solid var(--line);
    padding-top: 0.5rem;
  }

  .auth-layout {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .auth-copy h1 {
    max-width: 18ch;
  }

  .metric-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .track-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .site-shell {
    width: min(calc(100% - 1.25rem), var(--max));
  }

  .main-content {
    padding: 2rem 0 2.5rem;
  }

  .site-footer {
    display: grid;
    gap: 0.4rem;
  }

  .page-heading,
  .lesson-heading {
    display: grid;
    gap: 0.8rem;
  }

  .start-grid,
  .support-grid,
  .admin-grid,
  .report-grid {
    grid-template-columns: 1fr;
  }

  .task-card {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 0.8rem;
  }

  .task-index {
    width: 38px;
    height: 38px;
  }

  .task-action {
    grid-column: 2;
    align-items: stretch;
  }

  .task-action .button {
    width: 100%;
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .form-grid,
  .node-grid,
  .node-check-grid {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: auto;
  }

  .panel-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .code-editor {
    min-height: 46vh;
  }

  .copy-row {
    display: grid;
  }

  .account-name {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}