.hero {
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(rgba(23, 77, 93, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 77, 93, 0.045) 1px, transparent 1px),
    var(--color-surface);
  background-size: 28px 28px;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  padding-block: clamp(3.5rem, 9vw, 7.5rem);
}

.hero h1 {
  max-width: 850px;
  margin-bottom: 1rem;
}

.hero h1 span {
  display: block;
  margin-top: 0.55rem;
  color: var(--color-primary);
  font-size: clamp(1.05rem, 2.2vw, 1.5rem);
  font-weight: 650;
  letter-spacing: 0;
}

.open-learning-entry {
  display: grid;
  gap: 0.35rem;
  max-width: 720px;
  margin: 0 0 1.15rem;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(23, 77, 93, 0.22);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: rgba(244, 249, 249, 0.92);
}

.open-learning-entry strong {
  color: var(--color-primary);
  font-size: 1.05rem;
}

.hero__copy .lead {
  max-width: 720px;
}

.hero__actions {
  margin-top: 1.6rem;
}

.hero__panel {
  position: relative;
  padding: 1.2rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-soft);
}

.hero__panel::before {
  position: absolute;
  inset: 0.75rem auto 0.75rem 0;
  width: 4px;
  border-radius: 2px;
  background: var(--color-accent);
  content: "";
}

.hero__panel-label {
  margin-bottom: 0.25rem;
  color: var(--color-ink-soft);
  font-size: 0.75rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__panel-value {
  margin-bottom: 0.9rem;
  color: var(--color-primary-dark);
  font-size: 1.45rem;
  font-weight: 800;
}

.hero__panel p:last-child {
  margin-bottom: 0;
}

.badge-row {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  padding: 0.24rem 0.52rem;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  font-size: 0.75rem;
  font-weight: 740;
  line-height: 1.35;
}

.badge--accent {
  background: var(--color-accent-soft);
  color: #7a3c29;
}

.badge--success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.badge--muted {
  background: #e9edef;
  color: #5e6c72;
}

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

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

.info-card {
  padding: 1.25rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: 0 3px 12px rgba(27, 61, 73, 0.045);
}

.info-card h3 {
  margin-bottom: 0.45rem;
}

.info-card p:last-child,
.info-card ul:last-child {
  margin-bottom: 0;
}

.info-card--available {
  border-top: 4px solid var(--color-primary);
}

.info-card--planned {
  border-top: 4px solid var(--color-line-strong);
  background: #f7f9f9;
}

/* Batch A: compact Dashboard and task-oriented hub pages */
.dashboard-hero {
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(rgba(23, 77, 93, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 77, 93, 0.035) 1px, transparent 1px),
    var(--color-surface);
  background-size: 32px 32px;
}

.dashboard-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(285px, 0.55fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  padding-block: clamp(3.2rem, 7vw, 6rem);
}

.dashboard-hero h1 span {
  display: block;
  margin-top: 0.5rem;
  color: var(--color-primary);
  font-size: clamp(1rem, 2vw, 1.4rem);
  font-weight: 650;
}

.dashboard-hero__actions {
  margin-top: 1.5rem;
}

.dashboard-resume {
  padding: 1.35rem;
  border: 1px solid var(--color-line);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-soft);
}

.dashboard-resume h2 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
}

.dashboard-resume .button {
  margin-top: 0.35rem;
}

.dashboard-status {
  border-bottom: 1px solid var(--color-line);
  background: #fff;
}

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

.dashboard-status article {
  display: grid;
  gap: 0.2rem;
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--color-line);
}

.dashboard-status article:first-child {
  border-left: 1px solid var(--color-line);
}

.dashboard-status span {
  color: var(--color-ink-soft);
  font-size: 0.78rem;
}

.dashboard-status strong {
  color: var(--color-primary-dark);
  font-size: 1.25rem;
}

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

.task-entry-card {
  position: relative;
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 1.35rem;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.task-entry-card--priority {
  border-top: 4px solid var(--color-primary);
}

.task-entry-card__index {
  position: absolute;
  top: 0.75rem;
  right: 0.9rem;
  color: rgba(23, 77, 93, 0.16);
  font-size: 2.2rem;
  font-weight: 850;
}

.task-entry-card h3 {
  margin-bottom: 0.55rem;
}

.task-entry-card > a {
  margin-top: auto;
  color: var(--color-primary);
  font-weight: 760;
  text-decoration: none;
}

.reasoning-section,
.subtle-section {
  border-block: 1px solid var(--color-line);
  background: #f5f9f9;
}

.reasoning-section__grid {
  display: grid;
  grid-template-columns: minmax(230px, 0.6fr) minmax(0, 1.4fr);
  gap: var(--space-5);
  align-items: start;
}

.reasoning-track {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.reasoning-track li {
  display: grid;
  gap: 0.2rem;
  padding: 0.9rem;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background: #fff;
}

.reasoning-track span {
  color: var(--color-ink-soft);
  font-size: 0.82rem;
}

.compact-resource-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.compact-resource-row h2,
.compact-resource-row p {
  margin-bottom: 0;
}

.hub-hero {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface);
}

.hub-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: var(--space-5);
  align-items: center;
  padding-block: clamp(2.8rem, 6vw, 5rem);
}

.hub-hero__inner > aside {
  padding: 1.2rem;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: #fff;
}

.hub-card-grid,
.system-entry-grid,
.review-entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.hub-card,
.system-entry-grid article,
.review-entry-grid article {
  padding: 1.2rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.hub-card > span {
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.08em;
}

.hub-card > a,
.system-entry-grid article > a {
  color: var(--color-primary);
  font-weight: 740;
  text-decoration: none;
}

.system-entry-grid article p {
  color: var(--color-ink-soft);
  font-size: 0.82rem;
}

.review-entry-grid article:first-child {
  grid-column: span 2;
}

.reviewer-path {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.reviewer-path li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1.2rem;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.reviewer-path h3 {
  margin: 0.5rem 0 0.35rem;
}

.reviewer-path p {
  margin-bottom: 0;
}

@media (max-width: 820px) {
  .dashboard-hero__grid,
  .hub-hero__inner,
  .reasoning-section__grid {
    grid-template-columns: 1fr;
  }

  .task-entry-grid,
  .hub-card-grid,
  .system-entry-grid,
  .review-entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .review-entry-grid article:first-child {
    grid-column: auto;
  }
}

@media (max-width: 560px) {
  .dashboard-status__grid,
  .task-entry-grid,
  .hub-card-grid,
  .system-entry-grid,
  .review-entry-grid,
  .reasoning-track {
    grid-template-columns: 1fr;
  }

  .dashboard-status article,
  .dashboard-status article:first-child {
    border-right: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
    border-left: 1px solid var(--color-line);
  }

  .compact-resource-row,
  .reviewer-path li {
    align-items: stretch;
    flex-direction: column;
    grid-template-columns: 1fr;
  }
}

.learning-principle {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  gap: var(--space-5);
  align-items: start;
}

.layer-stack {
  display: grid;
  gap: 0.55rem;
  counter-reset: layers;
}

.layer-stack__item {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: center;
  padding: 0.72rem 0.85rem;
  border: 1px solid var(--color-line);
  border-left: 4px solid color-mix(in srgb, var(--color-primary) calc(42% + var(--layer) * 7%), white);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transform: translateX(calc(var(--layer) * 3px));
}

.layer-stack__item::before {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  content: counter(layers);
  counter-increment: layers;
  font-size: 0.78rem;
  font-weight: 820;
}

.layer-stack__item strong {
  font-size: 0.94rem;
}

.reasoning-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.35rem;
  margin-top: var(--space-4);
}

.reasoning-flow__step {
  position: relative;
  padding: 0.8rem 0.5rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-primary-dark);
  text-align: center;
  font-size: 0.8rem;
  font-weight: 760;
}

.embedded-terminology {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: #f7faf9;
}

.core-entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
  margin-top: 1.1rem;
}

.core-entry-grid a {
  display: grid;
  gap: 0.15rem;
  min-height: 96px;
  align-content: center;
  padding: 0.85rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-ink);
  text-decoration: none;
}

.core-entry-grid a:hover,
.core-entry-grid a:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.core-entry-grid strong { color: var(--color-primary-dark); }
.core-entry-grid span { font-size: 0.76rem; font-weight: 760; letter-spacing: 0.04em; }
.core-entry-grid small { color: var(--color-ink-soft); line-height: 1.35; }

.embedded-terminology__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
}

.embedded-terminology__grid article {
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background: #fff;
}

.embedded-terminology__grid h4 {
  margin: 0 0 0.3rem;
  color: var(--color-ink-soft);
  font-size: 0.73rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.embedded-terminology__grid p,
.embedded-terminology__note { margin: 0; line-height: 1.55; }

.embedded-terminology__note {
  margin-top: 0.65rem;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
}

.embedded-terminology .button-row { margin-top: 0.75rem; }

@media (max-width: 720px) {
  .core-entry-grid { grid-template-columns: 1fr 1fr; }
  .embedded-terminology__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .core-entry-grid { grid-template-columns: 1fr; }
  .embedded-terminology__grid { grid-template-columns: 1fr; }
}

.reasoning-flow__step:not(:last-child)::after {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: -0.42rem;
  color: var(--color-accent);
  content: "›";
  font-size: 1.15rem;
  transform: translateY(-53%);
}

.callout {
  padding: 1rem 1.1rem;
  border-left: 5px solid var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout--warning {
  border-left-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: #703a29;
}

.callout--success {
  border-left-color: var(--color-success);
  background: var(--color-success-soft);
  color: #275a3f;
}

.route-notice {
  margin-bottom: 1.25rem;
}

.page-intro {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface);
}

.page-intro__inner {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-intro h1 {
  margin-bottom: 0.75rem;
  font-size: clamp(2rem, 4vw, 3rem);
}

.page-intro .lead {
  max-width: 800px;
  margin-bottom: 0;
}

.route-map {
  position: relative;
  display: grid;
  gap: 1rem;
}

.route-map::before {
  position: absolute;
  top: 1.6rem;
  bottom: 1.6rem;
  left: 2.05rem;
  width: 2px;
  background: var(--color-line);
  content: "";
}

.route-level {
  position: relative;
  display: grid;
  grid-template-columns: 4.1rem minmax(0, 1fr);
  gap: 1rem;
}

.route-level__marker {
  z-index: 1;
  display: grid;
  width: 4.1rem;
  height: 4.1rem;
  place-items: center;
  border: 4px solid var(--color-page);
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 820;
  line-height: 1.1;
  text-align: center;
}

.route-level--planned .route-level__marker {
  background: #7d8d93;
}

.route-level__card {
  padding: 1.3rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.route-level__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.route-level__header h2 {
  margin-bottom: 0.25rem;
  font-size: 1.45rem;
}

.route-level__header p {
  margin-bottom: 0;
  color: var(--color-ink-soft);
  font-size: 0.88rem;
}

.route-level__summary {
  margin: 1rem 0;
}

.route-module-note {
  display: inline-flex;
  align-items: center;
  color: var(--color-ink-soft);
  font-size: 0.78rem;
}

.route-level details {
  border-top: 1px solid var(--color-line);
  padding-top: 0.8rem;
}

.route-level summary {
  color: var(--color-primary);
  font-weight: 740;
  cursor: pointer;
}

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

.route-details section {
  padding: 0.9rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface-soft);
}

.route-details h3 {
  margin-bottom: 0.45rem;
  font-size: 0.94rem;
}

.route-details ul {
  margin-bottom: 0;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
}

.filter-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(190px, 0.32fr);
  gap: 0.8rem;
  margin-bottom: 1rem;
  padding: 1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.filter-field {
  display: grid;
  gap: 0.35rem;
}

.filter-field label {
  color: var(--color-ink-soft);
  font-size: 0.8rem;
  font-weight: 760;
}

.filter-field input,
.filter-field select {
  width: 100%;
  min-height: 44px;
  padding: 0.58rem 0.68rem;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-ink);
}

.result-count {
  margin-bottom: 0.8rem;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
}

.glossary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.term-card {
  align-self: start;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  overflow: clip;
}

.term-card summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.8rem;
  align-items: center;
  padding: 1rem;
  cursor: pointer;
  list-style: none;
}

.term-card summary::-webkit-details-marker {
  display: none;
}

.term-card summary::after {
  display: grid;
  width: 1.8rem;
  height: 1.8rem;
  place-items: center;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  content: "+";
  font-weight: 800;
}

.term-card[open] summary::after {
  content: "−";
}

.term-card__title {
  display: block;
  font-weight: 790;
}

.term-card__english {
  display: block;
  color: var(--color-primary);
  font-size: 0.9rem;
}

.term-card__body {
  display: grid;
  gap: 0.8rem;
  padding: 0 1rem 1rem;
}

.term-card__body section {
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-line);
}

.term-card__body h3 {
  margin-bottom: 0.25rem;
  color: var(--color-ink-soft);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.term-card__body p {
  margin-bottom: 0;
  font-size: 0.92rem;
}

@media (max-width: 960px) {
  .hero__inner,
  .learning-principle {
    grid-template-columns: 1fr;
  }

  .hero__panel {
    max-width: 620px;
  }

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

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

  .reasoning-flow__step:nth-child(3)::after {
    content: "";
  }

  .layer-stack__item {
    transform: none;
  }
}

@media (max-width: 720px) {
  .route-map::before {
    left: 1.55rem;
  }

  .route-level {
    grid-template-columns: 3.1rem minmax(0, 1fr);
    gap: 0.65rem;
  }

  .route-level__marker {
    width: 3.1rem;
    height: 3.1rem;
    border-width: 3px;
    font-size: 0.66rem;
  }

  .route-level__header {
    display: grid;
  }

  .route-details,
  .glossary-list {
    grid-template-columns: 1fr;
  }

  .filter-bar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .card-grid,
  .card-grid--two {
    grid-template-columns: 1fr;
  }

  .reasoning-flow {
    grid-template-columns: 1fr;
  }

  .reasoning-flow__step:not(:last-child)::after {
    top: auto;
    right: 50%;
    bottom: -1rem;
    transform: rotate(90deg);
  }

}