:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #dbe4ee;
  --blue: #2563eb;
  --mint: #10b981;
  --amber: #f59e0b;
  --rose: #f43f5e;
  --violet: #7c3aed;
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.1);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(37, 99, 235, 0.08), transparent 32%),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  color: var(--ink);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.55);
  outline-offset: 3px;
}

.skip-link {
  background: var(--ink);
  color: #fff;
  left: 16px;
  padding: 10px 12px;
  position: fixed;
  top: -52px;
  z-index: 10;
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  align-items: center;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(219, 228, 238, 0.8);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: space-between;
  left: 0;
  padding: 12px 18px;
  position: sticky;
  right: 0;
  top: 0;
  z-index: 5;
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: 10px;
}

.brand-mark {
  align-items: center;
  background: var(--ink);
  border-radius: 8px;
  color: #fff;
  display: inline-flex;
  font-weight: 800;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 0.95rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.72rem;
  margin-top: 1px;
}

.site-nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-bottom: 2px;
}

.site-nav a {
  border-radius: 999px;
  color: var(--muted);
  flex: 0 0 auto;
  font-size: 0.88rem;
  padding: 9px 12px;
}

.site-nav a.is-active,
.site-nav a:hover {
  background: #eef4ff;
  color: var(--blue);
}

main {
  margin: 0 auto;
  max-width: 1120px;
  padding: 0 18px 72px;
}

.home-hero,
.list-hero,
.lesson-title-panel {
  padding: 44px 0 28px;
}

.home-hero {
  align-items: center;
  display: grid;
  gap: 26px;
  min-height: calc(100svh - 88px);
}

.hero-copy h1,
.list-hero h1,
.lesson-title-panel h1 {
  font-size: clamp(2.25rem, 10vw, 4.8rem);
  line-height: 1.04;
  margin: 8px 0 18px;
  max-width: 840px;
}

.lesson-title-panel h1 {
  color: var(--accent);
}

.hero-lead,
.list-hero p,
.lesson-title-panel p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 680px;
}

.eyebrow,
.section-label {
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 800;
  margin: 0;
  text-transform: uppercase;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.primary-button,
.secondary-button,
.next-button,
.ghost-button {
  align-items: center;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 48px;
  padding: 13px 18px;
  text-align: center;
}

.primary-button {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
}

.primary-button.compact {
  min-width: 112px;
}

.secondary-button,
.next-button,
.ghost-button {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
}

.ghost-button.danger {
  border-color: #fecdd3;
  color: #be123c;
}

.next-button {
  margin-top: 22px;
}

.hero-visual {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
  padding: 12px;
}

.hero-visual svg {
  display: block;
  width: 100%;
}

.hero-route {
  fill: none;
  stroke: url("#heroLine");
  stroke-dasharray: 8 10;
  stroke-linecap: round;
  stroke-width: 8;
}

.hero-node rect {
  fill: #eff6ff;
  stroke: #bfdbfe;
}

.hero-node.mint rect {
  fill: #ecfdf5;
  stroke: #a7f3d0;
}

.hero-node.amber rect {
  fill: #fffbeb;
  stroke: #fde68a;
}

.hero-node.rose rect {
  fill: #fff1f2;
  stroke: #fecdd3;
}

.hero-node text {
  dominant-baseline: middle;
  fill: var(--ink);
  font-size: 18px;
  font-weight: 800;
  text-anchor: middle;
}

.hero-browser rect:first-child {
  fill: #fff;
  stroke: var(--line);
  stroke-width: 2;
}

.hero-browser circle {
  fill: #cbd5e1;
}

.hero-browser rect:not(:first-child) {
  fill: #dbeafe;
}

.hero-packet {
  fill: #f97316;
}

.section-band {
  padding: 34px 0;
}

.section-band.tight {
  padding-top: 18px;
}

.understanding-map {
  margin: 18px 0 30px;
}

.understanding-grid,
.lesson-group-stack {
  display: grid;
  gap: 14px;
}

.understanding-card {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--blue);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
  display: grid;
  gap: 14px;
  padding: 16px;
}

.understanding-card.needs-review {
  border-left-color: var(--rose);
}

.understanding-card.is-next-action {
  border-color: #93c5fd;
  box-shadow: 0 18px 42px rgba(37, 99, 235, 0.18);
}

.understanding-card span,
.lesson-group-heading span {
  color: var(--muted);
  display: block;
  font-size: 0.76rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.understanding-card h3,
.lesson-group-heading h3 {
  font-size: 1.1rem;
  line-height: 1.35;
  margin: 0;
}

.understanding-lessons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.understanding-lessons small {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 5px 8px;
}

.understanding-status,
.lesson-group-status {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.understanding-status strong,
.lesson-group-status strong {
  font-size: 1.35rem;
  line-height: 1;
}

.understanding-status em,
.lesson-group-status em {
  background: #eef4ff;
  border-radius: 999px;
  color: var(--blue);
  font-size: 0.76rem;
  font-style: normal;
  font-weight: 900;
  padding: 6px 8px;
}

.understanding-card.needs-review .understanding-status em,
.lesson-group-section.needs-review .lesson-group-status em {
  background: #fff1f2;
  color: #be123c;
}

.next-map-pill {
  background: #ecfdf5 !important;
  color: #047857 !important;
}

.lesson-group-section {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
  padding: 18px;
  scroll-margin-top: 92px;
}

.lesson-group-section:focus {
  outline: 3px solid rgba(37, 99, 235, 0.26);
  outline-offset: 3px;
}

.lesson-group-heading {
  align-items: start;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 14px;
}

.group-order {
  color: var(--blue) !important;
  margin: -2px 0 6px !important;
}

.dashboard-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
  margin: 0 0 28px;
  padding: 20px;
}

.dashboard-heading h2 {
  font-size: clamp(1.45rem, 5vw, 2.25rem);
  line-height: 1.15;
  margin: 6px 0 0;
}

.growth-dashboard {
  display: grid;
  gap: 12px;
}

.overall-growth-card,
.growth-goals,
.domain-growth-card,
.weak-domain-summary,
.completion-growth-card,
.progress-section,
.domain-progress-row,
.achievement-item,
.growth-history-item {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.overall-growth-card {
  display: grid;
  gap: 12px;
}

.overall-growth-card span,
.growth-goals > span,
.domain-growth-card span,
.weak-domain-summary > span,
.completion-growth-card > span {
  color: var(--muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.overall-growth-card h3,
.completion-growth-card h3 {
  font-size: clamp(1.35rem, 5vw, 2rem);
  line-height: 1.15;
  margin: 0;
}

.overall-growth-card p,
.weak-domain-summary p,
.completion-growth-card p {
  color: var(--muted);
  line-height: 1.7;
  margin: 4px 0 0;
}

.overall-growth-card > strong {
  color: var(--blue);
  font-size: 0.92rem;
}

.exp-bar,
.mini-exp-bar {
  background: #e2e8f0;
  border-radius: 999px;
  height: 12px;
  overflow: hidden;
}

.exp-bar span,
.mini-exp-bar span {
  background: linear-gradient(90deg, #2563eb, #10b981);
  display: block;
  height: 100%;
  min-width: 4px;
}

.mini-exp-bar {
  height: 8px;
}

.growth-goals ul {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.growth-goals li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-weight: 800;
  line-height: 1.45;
  padding: 9px 10px;
}

.domain-growth-grid,
.domain-progress-list,
.achievement-list,
.growth-history-list {
  display: grid;
  gap: 10px;
}

.domain-growth-card {
  display: grid;
  gap: 9px;
}

.domain-growth-card > div:first-child,
.domain-progress-row > div:first-child {
  align-items: baseline;
  display: flex;
  gap: 8px;
  justify-content: space-between;
}

.domain-growth-card strong,
.domain-progress-row strong {
  font-size: 1.35rem;
  line-height: 1;
}

.domain-growth-card p,
.domain-progress-row p,
.achievement-item p,
.growth-history-item p {
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
}

.weak-domain-summary {
  border-left: 5px solid var(--rose);
}

.weak-domain-summary.is-clear {
  border-left-color: var(--mint);
}

.dashboard-metrics {
  display: grid;
  gap: 10px;
}

.dashboard-metrics div,
.dashboard-weakness,
.dashboard-export,
.exam-history-panel {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.dashboard-metrics span,
.dashboard-weakness > span,
.dashboard-export span,
.exam-history-panel > span {
  color: var(--muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.dashboard-metrics strong {
  display: block;
  font-size: 1.7rem;
  line-height: 1;
}

.dashboard-weakness p,
.dashboard-export p,
.exam-history-panel p {
  color: var(--muted);
  margin: 0;
}

.dashboard-export {
  display: grid;
  gap: 12px;
}

.export-fallback {
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font: 0.82rem ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  min-height: 180px;
  padding: 12px;
  resize: vertical;
  width: 100%;
}

.export-status {
  font-size: 0.88rem;
}

.exam-history-panel {
  display: grid;
  gap: 10px;
}

.exam-history-panel.is-standalone {
  background: #fff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
  margin: 18px 0;
}

.exam-history-metrics {
  align-items: baseline;
  display: flex;
  gap: 10px;
}

.exam-history-metrics strong {
  font-size: 1.8rem;
  line-height: 1;
}

.exam-history-metrics em {
  color: var(--blue);
  font-style: normal;
  font-weight: 900;
}

.exam-history-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.exam-history-panel small,
.exam-history-tags small {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  display: inline-flex;
  font-size: 0.76rem;
  font-weight: 800;
  gap: 6px;
  padding: 6px 8px;
}

.exam-history-tags b {
  color: #be123c;
}

.dashboard-weakness ol {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.dashboard-weakness li {
  align-items: center;
  display: flex;
  gap: 10px;
  justify-content: space-between;
}

.dashboard-weakness li strong {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 8px;
  white-space: nowrap;
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading.inline {
  align-items: start;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
}

.section-heading h2,
.lesson-section h2 {
  font-size: clamp(1.65rem, 6vw, 2.8rem);
  line-height: 1.12;
  margin: 6px 0 8px;
}

.section-heading p,
.lesson-section p {
  color: var(--muted);
  line-height: 1.75;
}

.lesson-grid {
  display: grid;
  gap: 14px;
}

.lesson-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.06);
  display: flex;
  flex-direction: column;
  min-height: 248px;
  min-width: 0;
  padding: 18px;
  position: relative;
}

.lesson-card::before {
  background: var(--accent);
  content: "";
  height: 4px;
  left: 18px;
  position: absolute;
  right: 18px;
  top: 0;
}

.lesson-card-top,
.lesson-meta {
  align-items: center;
  color: var(--muted);
  display: flex;
  font-size: 0.82rem;
  justify-content: space-between;
}

.lesson-number {
  color: var(--accent);
  font-weight: 900;
}

.lesson-card h3 {
  font-size: 1.34rem;
  margin: 18px 0 8px;
}

.lesson-card p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0 0 18px;
}

.lesson-card a {
  align-items: center;
  background: color-mix(in srgb, var(--accent) 11%, white);
  border-radius: 8px;
  color: var(--accent);
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  margin-top: auto;
  min-height: 44px;
}

.duration-pill {
  background: #eef4ff;
  border-radius: 999px;
  color: var(--blue);
  display: inline-flex;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 7px 10px;
}

.back-link {
  color: var(--muted);
  display: inline-flex;
  font-weight: 700;
  margin-bottom: 20px;
}

.step-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
  padding-bottom: 8px;
}

.step-pills a {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  flex: 0 0 auto;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 9px 12px;
}

.lesson-section {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
  margin: 18px 0;
  min-height: min(720px, calc(100svh - 92px));
  padding: 24px 18px;
}

.lesson-section h2 {
  max-width: 820px;
}

.hook-section h2,
.quiz-section h2,
.exam-section h2 {
  font-size: clamp(1.9rem, 7vw, 3.5rem);
}

.choice-panel {
  margin-top: 24px;
}

.choice-grid {
  display: grid;
  gap: 10px;
}

.choice-button {
  align-items: center;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  cursor: pointer;
  display: grid;
  gap: 12px;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  min-height: 62px;
  min-width: 0;
  padding: 12px;
  text-align: left;
  overflow-wrap: anywhere;
}

.choice-button span {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: inline-flex;
  font-weight: 900;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.choice-button:hover:not(:disabled) {
  border-color: var(--blue);
  transform: translateY(-1px);
}

.choice-button.is-correct {
  background: #ecfdf5;
  border-color: #34d399;
}

.choice-button.is-wrong {
  background: #fff1f2;
  border-color: #fb7185;
}

.choice-button.is-correct::after,
.choice-button.is-wrong::after {
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 900;
  padding: 5px 7px;
  white-space: nowrap;
}

.choice-button.is-correct::after {
  background: #d1fae5;
  color: #047857;
  content: "正解";
}

.choice-button.is-wrong::after {
  background: #ffe4e6;
  color: #be123c;
  content: "選択";
}

.choice-feedback {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: none;
  margin: 14px 0 0;
  padding: 14px;
}

.choice-feedback.is-visible {
  display: block;
}

.answer-growth-feedback {
  display: grid;
  gap: 10px;
}

.answer-growth-feedback strong {
  display: block;
  font-size: 1.05rem;
}

.answer-growth-feedback p {
  color: var(--ink);
  line-height: 1.7;
  margin: 0;
}

.answer-growth-feedback ul {
  display: grid;
  gap: 7px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.answer-growth-feedback li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  line-height: 1.45;
  padding: 9px 10px;
}

.answer-growth-feedback small {
  color: var(--blue);
  font-weight: 900;
}

.answer-growth-feedback.status-correct li:first-child {
  background: #ecfdf5;
  border-color: #a7f3d0;
  color: #047857;
}

.answer-growth-feedback.status-wrong li:nth-child(2),
.answer-growth-feedback.status-wrong li:nth-child(3) {
  background: #fff1f2;
  border-color: #fecdd3;
  color: #be123c;
}

.point-flow {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.point-item {
  align-items: center;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 14px;
  grid-template-columns: 42px 1fr;
  padding: 14px;
}

.point-item span {
  align-items: center;
  background: var(--ink);
  border-radius: 8px;
  color: #fff;
  display: inline-flex;
  font-weight: 900;
  height: 42px;
  justify-content: center;
  width: 42px;
}

.point-item p {
  color: var(--ink);
  margin: 0;
}

.video-shell {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 14px;
  margin-top: 18px;
  overflow: hidden;
  padding: 12px;
}

.video-visual,
.diagram-svg {
  display: block;
  width: 100%;
}

.video-path {
  fill: none;
  stroke: url("#videoGradient");
  stroke-dasharray: 10 10;
  stroke-linecap: round;
  stroke-width: 8;
}

.video-node {
  fill: #fff;
  stroke: #cbd5e1;
  stroke-width: 2;
}

.video-label {
  fill: var(--ink);
  font-size: 13px;
  font-weight: 900;
}

.packet-dot {
  fill: #f97316;
}

.packet-dot.secondary {
  fill: #2563eb;
  opacity: 0.75;
}

.beat-list {
  counter-reset: beat;
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.beat-list li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  line-height: 1.65;
  padding: 10px 12px;
}

.experience-steps {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 14px;
  padding: 16px;
}

.experience-step-top {
  align-items: center;
  display: flex;
  gap: 10px;
  justify-content: space-between;
}

.experience-step-top span {
  background: #eef4ff;
  border-radius: 999px;
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 900;
  padding: 7px 10px;
}

.experience-step-top strong {
  font-size: 0.95rem;
}

.experience-step-body {
  min-height: 112px;
}

.experience-step {
  color: var(--ink) !important;
  display: none;
  font-size: 1.16rem;
  font-weight: 800;
  line-height: 1.7;
  margin: 0;
}

.experience-step.is-active {
  display: block;
}

.experience-step-dots {
  display: flex;
  gap: 7px;
}

.experience-step-dots span {
  background: #cbd5e1;
  border-radius: 999px;
  height: 8px;
  width: 24px;
}

.experience-step-dots span.is-active {
  background: var(--blue);
}

.experience-step-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.experience-step-actions button:disabled {
  cursor: default;
  opacity: 0.72;
}

.experience-step-actions [data-step-diagram].is-ready {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.18);
}

.interactive-demo {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 14px;
  margin-top: 14px;
  padding: 16px;
}

.interactive-demo-heading {
  display: grid;
  gap: 6px;
}

.interactive-demo-heading span {
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.interactive-demo-heading h3 {
  font-size: 1.25rem;
  line-height: 1.3;
  margin: 0;
}

.interactive-demo-heading p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}

.demo-step-track {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
}

.demo-step-track.is-packet-flow {
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.demo-step-card,
.demo-choice-card {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 8px;
  min-height: 146px;
  opacity: 0.44;
  padding: 14px;
}

.demo-choice-card {
  display: none;
  min-height: 154px;
  opacity: 1;
}

.demo-step-card.is-revealed,
.demo-choice-card.is-active {
  opacity: 1;
}

.demo-step-card.is-active,
.demo-choice-card.is-active {
  border-color: #93c5fd;
  display: grid;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.14);
}

.demo-step-card span,
.demo-choice-card span {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--blue);
  display: inline-flex;
  font-size: 0.76rem;
  font-weight: 900;
  height: 30px;
  justify-content: center;
  width: 40px;
}

.demo-step-card strong,
.demo-choice-card strong {
  font-size: 0.95rem;
}

.demo-step-card small {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  display: inline-flex;
  font-size: 0.74rem;
  font-weight: 900;
  line-height: 1.4;
  padding: 5px 8px;
  width: fit-content;
}

.demo-step-card p,
.demo-choice-card p {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 800;
  line-height: 1.55;
  margin: 0;
  overflow-wrap: anywhere;
}

.step-action-demo .demo-step-card p,
.packet-flow-demo .demo-step-card p {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.demo-choice-stage {
  min-height: 154px;
}

.demo-choice-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
}

.demo-choice-grid.is-layer-targets {
  grid-template-columns: repeat(auto-fit, minmax(172px, 1fr));
}

.demo-answer-button {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
  min-height: 46px;
  padding: 10px 12px;
}

.demo-answer-button:hover:not(:disabled) {
  border-color: var(--blue);
  transform: translateY(-1px);
}

.demo-answer-button.is-correct {
  background: #ecfdf5;
  border-color: #34d399;
  color: #047857;
}

.demo-answer-button.is-wrong {
  background: #fff1f2;
  border-color: #fb7185;
  color: #be123c;
}

.demo-answer-button:disabled {
  cursor: default;
}

.demo-status {
  align-items: start;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 8px;
  grid-template-columns: auto minmax(0, 1fr);
  padding: 12px;
}

.demo-status span {
  background: #eef4ff;
  border-radius: 999px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
  padding: 6px 8px;
  white-space: nowrap;
}

.demo-status p {
  color: var(--ink);
  line-height: 1.65;
  margin: 0;
}

.interactive-demo [data-demo-next]:disabled {
  cursor: default;
  opacity: 0.62;
}

.demo-completion {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 8px;
  color: #047857 !important;
  font-weight: 900;
  margin: 0;
  padding: 12px;
}

.interactive-demo.is-complete .demo-status {
  background: #ecfdf5;
  border-color: #a7f3d0;
}

.storyboard {
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-top: 12px;
  padding: 12px 14px;
}

.storyboard summary {
  cursor: pointer;
  font-weight: 800;
}

.storyboard li {
  color: var(--muted);
  line-height: 1.7;
  margin: 6px 0;
}

.diagram-frame {
  background: linear-gradient(180deg, #ffffff, #f8fafc);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-top: 18px;
  overflow: hidden;
  padding: 12px;
}

.diagram-svg {
  height: auto;
  min-width: 0;
}

.diagram-edge line {
  marker-end: url("#arrow");
  stroke: #334155;
  stroke-linecap: round;
  stroke-width: 2.2;
}

.diagram-edge text {
  fill: #475569;
  font-size: 12px;
  font-weight: 800;
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 5px;
  text-anchor: middle;
}

.diagram-node rect {
  stroke-width: 2;
}

.diagram-node text {
  fill: var(--ink);
  font-size: 14px;
  font-weight: 900;
  text-anchor: middle;
}

.tone-blue rect {
  fill: #eff6ff;
  stroke: #93c5fd;
}

.tone-mint rect {
  fill: #ecfdf5;
  stroke: #6ee7b7;
}

.tone-amber rect {
  fill: #fffbeb;
  stroke: #fcd34d;
}

.tone-rose rect {
  fill: #fff1f2;
  stroke: #fda4af;
}

.tone-violet rect {
  fill: #f5f3ff;
  stroke: #c4b5fd;
}

.tone-ink rect {
  fill: #f1f5f9;
  stroke: #94a3b8;
}

.diagram-notes {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.diagram-summary {
  display: none;
  margin-top: 12px;
}

.diagram-summary summary {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 900;
  padding: 12px;
}

.diagram-summary-grid {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.diagram-summary-grid article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

.diagram-summary-grid strong {
  display: block;
  margin-bottom: 4px;
}

.diagram-summary-grid p {
  color: var(--muted);
  line-height: 1.65;
  margin: 0;
}

.diagram-notes p,
.exam-tip {
  background: #f8fafc;
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  margin: 0;
  padding: 12px 14px;
}

.confusion-grid {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.confusion-card {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.confusion-pair {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.confusion-pair strong {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 10px;
}

.confusion-pair span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.confusion-card p {
  color: var(--ink);
  margin: 0 0 10px;
}

.confusion-card small {
  color: var(--blue);
  display: block;
  font-weight: 900;
  line-height: 1.5;
}

.related-review-tag {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  display: inline-flex;
  font-size: 0.74rem;
  font-weight: 900;
  margin: 6px 0 12px;
  padding: 6px 8px;
}

.confusion-exam-link {
  align-items: center;
  background: var(--ink);
  border-radius: 8px;
  color: #fff;
  display: inline-flex;
  font-size: 0.86rem;
  font-weight: 900;
  justify-content: center;
  min-height: 42px;
  padding: 10px 12px;
}

.exam-why-body {
  color: var(--ink) !important;
  font-size: 1.08rem;
  max-width: 820px;
}

.trap-list {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 8px;
  margin-top: 18px;
  padding: 16px;
}

.trap-list span {
  color: #92400e;
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  margin-bottom: 10px;
}

.trap-list ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
}

.trap-list li {
  line-height: 1.65;
}

.review-summary {
  color: var(--ink) !important;
  font-size: 1.15rem;
}

.lesson-feedback {
  border: 1px solid var(--line);
  border-left: 5px solid var(--blue);
  border-radius: 8px;
  margin: 18px 0;
  padding: 14px 16px;
}

.lesson-feedback strong {
  display: block;
  font-size: 1.02rem;
  margin-bottom: 4px;
}

.lesson-feedback p {
  color: var(--muted);
  margin: 0;
}

.lesson-feedback.status-done {
  background: #ecfdf5;
  border-left-color: #10b981;
}

.lesson-feedback.status-review {
  background: #fff1f2;
  border-left-color: #f43f5e;
}

.lesson-feedback.status-new,
.lesson-feedback.status-progress {
  background: #eff6ff;
}

.completion-growth-card {
  border-left: 5px solid var(--blue);
  display: grid;
  gap: 12px;
  margin: 18px 0;
}

.completion-growth-card.is-complete {
  border-left-color: var(--mint);
}

.achievement-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.achievement-chips strong,
.achievement-chips em {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 999px;
  color: #047857;
  display: inline-flex;
  font-size: 0.78rem;
  font-style: normal;
  font-weight: 900;
  line-height: 1.35;
  padding: 7px 9px;
}

.line-card {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 8px;
  margin: 20px 0;
  padding: 16px;
}

.line-card span {
  color: #047857;
  font-size: 0.8rem;
  font-weight: 900;
}

.line-card p {
  color: var(--ink);
  margin: 8px 0 14px;
}

.next-lessons {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.next-lesson-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 4px;
  padding: 14px;
}

.next-lesson-card span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.next-lesson-card strong {
  font-size: 1.1rem;
}

.next-action-panel {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 6px solid var(--accent, var(--blue));
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
  margin: 18px 0 28px;
  padding: 20px;
}

.next-action-panel h2 {
  font-size: clamp(1.4rem, 5vw, 2.2rem);
  line-height: 1.18;
  margin: 6px 0 8px;
}

.next-action-panel p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}

.next-action-tag {
  background: #fff1f2;
  border-radius: 999px;
  color: #be123c;
  display: inline-flex;
  font-size: 0.78rem;
  font-weight: 900;
  margin: 0 0 10px;
  padding: 6px 9px;
}

.next-action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.secondary-button.compact {
  min-width: 112px;
}

.progress-badge {
  align-self: flex-start;
  border-radius: 999px;
  display: inline-flex;
  font-size: 0.78rem;
  font-weight: 900;
  margin: 0 0 10px;
  padding: 7px 10px;
}

.status-new {
  background: #f1f5f9;
  color: #475569;
}

.status-progress {
  background: #eff6ff;
  color: #2563eb;
}

.status-done {
  background: #ecfdf5;
  color: #047857;
}

.status-review {
  background: #fff1f2;
  color: #be123c;
}

.progress-summary {
  align-items: center;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.8rem;
  gap: 8px;
  margin: 0 0 14px;
}

.progress-summary span {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 8px;
}

.title-progress {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.title-progress .progress-badge,
.title-progress .progress-summary {
  margin: 0;
}

.question-stack {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.question-card {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-width: 0;
  padding: 16px;
}

.question-card h3 {
  font-size: clamp(1.1rem, 4.5vw, 1.55rem);
  line-height: 1.3;
  margin: 6px 0 12px;
}

.question-kicker {
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0 10px;
}

.question-meta span {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 800;
  padding: 5px 8px;
}

.choice-button.was-correct {
  box-shadow: inset 0 0 0 2px rgba(16, 185, 129, 0.35);
}

.choice-button.was-wrong {
  box-shadow: inset 0 0 0 2px rgba(244, 63, 94, 0.35);
}

.compare-diagram {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.compare-column {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.compare-column h3 {
  font-size: 1.45rem;
  margin: 0 0 4px;
}

.compare-column p {
  color: var(--muted);
  margin: 0 0 12px;
}

.compare-column ul {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.compare-column li {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
}

.layer-diagram {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.layer-row {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 12px;
  grid-template-columns: 42px 1fr;
  padding: 12px;
}

.layer-row span {
  align-items: center;
  background: var(--ink);
  border-radius: 8px;
  color: #fff;
  display: inline-flex;
  font-weight: 900;
  height: 42px;
  justify-content: center;
  width: 42px;
}

.layer-row strong {
  display: block;
  font-size: 1rem;
}

.layer-row p {
  color: var(--muted);
  margin: 2px 0 0;
}

.weakness-overview,
.today-review,
.review-group,
.exam-mode-panel,
.exam-result {
  margin: 18px 0;
}

.weakness-overview {
  display: grid;
  gap: 14px;
}

.priority-weakness,
.today-review,
.review-group,
.exam-mode-panel,
.exam-result {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
  padding: 18px;
}

.exam-progress {
  background: #eef4ff;
  border-radius: 999px;
  color: var(--blue);
  flex: 0 0 auto;
  font-size: 0.82rem;
  font-weight: 900;
  padding: 8px 10px;
}

.exam-question-card {
  scroll-margin-top: 92px;
}

.exam-result-metrics,
.exam-result-grid {
  display: grid;
  gap: 12px;
}

.exam-result-metrics {
  margin-bottom: 14px;
}

.exam-result-metrics div,
.exam-result-grid article {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.exam-result-metrics span {
  color: var(--muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.exam-result-metrics strong {
  font-size: 2rem;
  line-height: 1;
}

.exam-result-grid h3 {
  margin: 0 0 10px;
}

.exam-result-grid p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}

.exam-result-grid ul {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.exam-result-grid li {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  gap: 10px;
  justify-content: space-between;
  padding: 10px 12px;
}

.exam-result-grid li strong {
  background: #fff1f2;
  border-radius: 999px;
  color: #be123c;
  font-size: 0.78rem;
  padding: 5px 8px;
}

.exam-result-grid a {
  color: var(--blue);
  font-weight: 900;
}

.exam-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.priority-weakness {
  border-left: 6px solid var(--rose);
}

.priority-weakness > span,
.review-group-heading span {
  color: var(--muted);
  display: block;
  font-size: 0.76rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.priority-weakness h2,
.review-group-heading h2 {
  font-size: clamp(1.35rem, 5vw, 2.1rem);
  line-height: 1.15;
  margin: 0;
}

.priority-weakness p {
  color: var(--muted);
  line-height: 1.7;
  margin: 10px 0 0;
}

.weakness-list,
.today-review-list,
.review-group-list {
  display: grid;
  gap: 10px;
}

.weakness-list a,
.today-review-list a {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 4px;
  padding: 13px;
}

.weakness-list a {
  grid-template-columns: 1fr auto;
}

.weakness-list span,
.today-review-list strong {
  font-weight: 900;
}

.weakness-list strong {
  background: #fff1f2;
  border-radius: 999px;
  color: #be123c;
  font-size: 0.78rem;
  padding: 6px 8px;
  white-space: nowrap;
}

.today-review-list a {
  grid-template-columns: 34px 1fr;
}

.today-review-list a > span {
  align-items: center;
  background: var(--ink);
  border-radius: 8px;
  color: #fff;
  display: inline-flex;
  font-weight: 900;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.today-review-list small {
  color: var(--muted);
  grid-column: 2;
}

.review-group-heading {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 12px;
}

.review-group-heading strong {
  background: #fff1f2;
  border-radius: 999px;
  color: #be123c;
  padding: 7px 10px;
  white-space: nowrap;
}

.empty-review,
.wrong-review-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
  margin: 18px 0;
  padding: 22px;
}

.empty-review h2,
.wrong-review-card h2 {
  font-size: clamp(1.35rem, 5vw, 2rem);
  line-height: 1.2;
  margin: 8px 0 12px;
}

.empty-review p,
.wrong-review-card p {
  color: var(--muted);
  line-height: 1.75;
}

.empty-review-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.wrong-review-card strong {
  color: var(--ink);
}

.wrong-review-card.is-resolved {
  border-color: #a7f3d0;
}

.review-resolved {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 8px;
  margin-bottom: 14px;
  padding: 14px;
}

.review-resolved strong {
  color: #047857;
  display: block;
  margin-bottom: 4px;
}

.review-resolved p {
  color: #065f46;
  margin: 0;
}

.review-retry-area {
  border-top: 1px solid var(--line);
  margin-top: 16px;
  padding-top: 16px;
}

.retry-focus-button {
  margin-bottom: 12px;
}

.review-list {
  display: grid;
  gap: 14px;
}

.progress-page-grid {
  display: grid;
  gap: 12px;
  margin: 18px 0;
}

.progress-section {
  background: #fff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
  margin: 18px 0;
  padding: 18px;
}

.domain-progress-row {
  display: grid;
  gap: 10px;
}

.domain-progress-row > span,
.achievement-item > span,
.growth-history-item > span {
  color: var(--muted);
  display: block;
  font-size: 0.76rem;
  font-weight: 900;
}

.achievement-item {
  background: #fff;
}

.achievement-item.is-unlocked {
  border-color: #a7f3d0;
  box-shadow: inset 5px 0 0 #10b981;
}

.achievement-item.is-locked {
  opacity: 0.7;
}

.achievement-item strong,
.growth-history-item strong {
  display: block;
  font-size: 1.05rem;
  margin: 4px 0;
}

.weak-domain-ranking {
  display: grid;
  gap: 10px;
}

.weak-domain-ranking article {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 12px;
  grid-template-columns: 38px 1fr;
  padding: 12px;
}

.weak-domain-ranking span {
  align-items: center;
  background: #fff1f2;
  border-radius: 8px;
  color: #be123c;
  display: inline-flex;
  font-weight: 900;
  height: 38px;
  justify-content: center;
  width: 38px;
}

.weak-domain-ranking strong {
  display: block;
  margin-bottom: 3px;
}

.weak-domain-ranking p,
.empty-progress-text {
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}

.growth-history-item {
  background: #fff;
  display: grid;
  gap: 5px;
}

@media (min-width: 720px) {
  .site-header {
    padding: 14px 28px;
  }

  main {
    padding-inline: 28px;
  }

  .home-hero {
    grid-template-columns: 0.96fr 1fr;
    padding: 40px 0 48px;
  }

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

  .dashboard-metrics {
    grid-template-columns: repeat(4, 1fr);
  }

  .growth-dashboard {
    grid-template-columns: 1fr 1fr;
  }

  .overall-growth-card,
  .domain-growth-grid,
  .weak-domain-summary {
    grid-column: span 2;
  }

  .domain-growth-grid,
  .domain-progress-list,
  .achievement-list,
  .growth-history-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .progress-page-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .lesson-group-heading {
    align-items: center;
    grid-template-columns: 1fr auto;
  }

  .weakness-overview {
    grid-template-columns: minmax(280px, 0.9fr) 1.1fr;
  }

  .today-review-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .next-action-panel {
    grid-template-columns: 1fr auto;
    padding: 24px;
  }

  .lesson-section {
    padding: 38px;
  }

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

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

  .video-shell {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    padding: 18px;
  }

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

  .confusion-grid,
  .exam-result-metrics,
  .exam-result-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .compare-diagram,
  .review-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 719px) {
  .site-header {
    align-items: flex-start;
  }

  .site-nav {
    justify-content: flex-start;
    width: 100%;
  }

  .site-nav a {
    padding-inline: 10px;
  }

  main {
    padding-inline: 14px;
  }

  .home-hero,
  .list-hero,
  .lesson-title-panel {
    padding-top: 28px;
  }

  .hero-copy h1,
  .list-hero h1,
  .lesson-title-panel h1 {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .dashboard-panel,
  .lesson-section,
  .priority-weakness,
  .today-review,
  .review-group,
  .exam-mode-panel,
  .exam-result,
  .progress-section,
  .empty-review,
  .wrong-review-card {
    padding: 16px;
  }

  .primary-button,
  .secondary-button,
  .next-button,
  .ghost-button,
  .confusion-exam-link,
  .lesson-card a {
    width: 100%;
  }

  .next-action-buttons,
  .hero-actions,
  .empty-review-actions,
  .exam-result-actions,
  .experience-step-actions {
    width: 100%;
  }

  .video-shell {
    padding: 10px;
  }

  .video-label {
    font-size: 12px;
  }

  .diagram-edge text {
    font-size: 10px;
  }

  .diagram-summary {
    display: grid;
  }

  .diagram-node text {
    font-size: 11px;
  }

  .lesson-card-top,
  .lesson-meta,
  .review-group-heading,
  .exam-result-grid li,
  .weakness-list a {
    align-items: flex-start;
    flex-direction: column;
  }

  .weakness-list a {
    grid-template-columns: 1fr;
  }

  .today-review-list a,
  .point-item,
  .layer-row {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .choice-button {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .choice-button.is-correct::after,
  .choice-button.is-wrong::after {
    grid-column: 2;
    justify-self: start;
  }
}