.app-shell[data-view="landing"] {
  --mode-accent: #243B5A;
  --mode-accent-text: #FFFFFF;
  --mode-soft: #E9EEF5;
  --mode-soft-text: #243B5A;
}

.landing-page[hidden] {
  display: none;
}

.landing-page {
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  padding: clamp(var(--space-4), 2vw, var(--space-6));
  background:
    radial-gradient(circle at 10% 0%, color-mix(in srgb, var(--mode-accent) 9%, transparent), transparent 28rem),
    var(--surface-canvas);
}

.landing-page__inner {
  width: min(1220px, 100%);
  margin: 0 auto;
  display: grid;
  gap: clamp(var(--space-5), 2vw, var(--space-7));
  padding-bottom: var(--space-7);
}

.landing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: var(--space-5);
  align-items: stretch;
}

.landing-hero__main,
.landing-quick-start,
.landing-section {
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  background: var(--surface-base);
  box-shadow: var(--shadow-raised);
}

.landing-hero__main {
  padding: clamp(var(--space-5), 3vw, var(--space-8));
  display: grid;
  align-content: center;
  gap: var(--space-4);
}

.landing-hero__eyebrow,
.landing-section__eyebrow {
  margin: 0;
  color: var(--mode-soft-text);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.landing-hero h1 {
  margin: 0;
  max-width: 17ch;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.landing-hero__lead {
  margin: 0;
  max-width: 68ch;
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.35vw, 1.2rem);
  line-height: 1.65;
}

.landing-quick-start {
  padding: var(--space-5);
  display: grid;
  align-content: start;
  gap: var(--space-4);
}

.landing-quick-start h2,
.landing-section h2 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.7rem);
  letter-spacing: -0.025em;
}

.landing-quick-start p,
.landing-section__intro {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.55;
}

.landing-entry-list {
  display: grid;
  gap: var(--space-3);
}

.landing-entry {
  width: 100%;
  min-height: 56px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--surface-canvas);
  text-align: left;
  cursor: pointer;
}

.landing-entry:hover,
.landing-entry:focus-visible {
  border-color: var(--mode-accent);
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--mode-accent) 15%, transparent);
}

.landing-entry__badge {
  min-width: 52px;
  min-height: 28px;
  display: inline-grid;
  place-items: center;
  padding-inline: var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
  font-size: 0.68rem;
  font-weight: var(--weight-bold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.landing-entry__copy {
  display: grid;
  gap: 2px;
}

.landing-entry__copy strong {
  font-size: var(--text-sm);
}

.landing-entry__copy span {
  color: var(--text-muted);
  font-size: var(--text-xs);
  line-height: 1.35;
}

.landing-entry__arrow {
  color: var(--mode-soft-text);
  font-size: var(--text-lg);
}

.landing-section {
  padding: clamp(var(--space-5), 2.5vw, var(--space-7));
  display: grid;
  gap: var(--space-5);
}

.landing-section__header {
  display: grid;
  gap: var(--space-2);
  max-width: 78ch;
}

.landing-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-3);
}

.landing-step {
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--surface-canvas);
  display: grid;
  align-content: start;
  gap: var(--space-2);
}

.landing-step__number {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--mode-accent);
  color: var(--mode-accent-text);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}

.landing-step strong {
  line-height: 1.25;
}

.landing-step p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.landing-mode-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-3);
}

.landing-mode-card {
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-top: 4px solid var(--mode-accent);
  border-radius: var(--radius-lg);
  background: var(--surface-canvas);
  display: grid;
  align-content: start;
  gap: var(--space-2);
}

.landing-mode-card__label {
  display: inline-flex;
  align-items: center;
  width: max-content;
  min-height: 26px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
}

.landing-mode-card h3 {
  margin: 0;
  font-size: var(--text-md);
}

.landing-mode-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.landing-mode-card__question {
  margin-top: var(--space-1);
  color: var(--text-primary);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  line-height: 1.4;
}

.landing-tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.landing-tool {
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  background: var(--surface-canvas);
  display: grid;
  align-content: start;
  gap: var(--space-2);
}

.landing-tool__icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--mode-soft);
  color: var(--mode-soft-text);
  font-weight: var(--weight-bold);
}

.landing-tool h3 {
  margin: 0;
  font-size: var(--text-md);
}

.landing-tool p {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.landing-note {
  padding: var(--space-4);
  border-left: 4px solid var(--feedback-info-accent);
  border-radius: var(--radius-md);
  background: var(--feedback-info-background);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.landing-note strong {
  color: var(--text-primary);
}

.app-shell[data-view="landing"] .topic-navigation-toggle {
  display: none !important;
}

@media (max-width: 1100px) {
  .landing-steps,
  .landing-mode-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .landing-mode-card:last-child,
  .landing-step:last-child {
    grid-column: span 2;
  }
}

@media (max-width: 780px) {
  .landing-page {
    padding: var(--space-3);
  }

  .landing-hero {
    grid-template-columns: 1fr;
  }

  .landing-hero h1 {
    max-width: 20ch;
    font-size: clamp(2rem, 10vw, 3.2rem);
  }

  .landing-steps,
  .landing-mode-grid,
  .landing-tool-grid {
    grid-template-columns: 1fr;
  }

  .landing-mode-card:last-child,
  .landing-step:last-child {
    grid-column: auto;
  }
}

@media (max-width: 520px) {
  .landing-hero__main,
  .landing-quick-start,
  .landing-section {
    border-radius: var(--radius-lg);
  }

  .landing-entry {
    grid-template-columns: 1fr auto;
  }

  .landing-entry__badge {
    grid-column: 1 / -1;
    justify-self: start;
  }
}