.overline {
  color: var(--color-brand);
  font-size: var(--text-label);
  font-weight: 600;
  letter-spacing: 0.03em;
}

.hero {
  display: grid;
  min-height: calc(100svh - 4.75rem);
  align-items: center;
  padding-block: var(--space-24);
}

.hero__grid,
.split-layout,
.trajectory-layout {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-12) var(--grid-gutter);
}

.hero__grid {
  align-items: center;
}

.hero__message,
.hero-summary,
.section-intro,
.problem-grid,
.trajectory-list,
.trajectory-layout > .section-actions {
  grid-column: 1 / -1;
}

.hero__name {
  margin-top: var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--text-lead);
  font-weight: 600;
}

.hero h1 {
  max-width: 18ch;
  margin-top: var(--space-3);
  font-size: var(--text-display);
}

.hero__description {
  max-width: 60ch;
  margin-top: var(--space-8);
  color: var(--color-text-secondary);
  font-size: var(--text-lead);
}

.hero__actions,
.section-actions,
.contact__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero-summary {
  align-self: center;
  padding: var(--space-6);
  border-top: var(--border-emphasis);
  background: var(--color-surface-secondary);
}

.summary-list {
  display: grid;
  gap: var(--space-6);
  margin: var(--space-6) 0 0;
}

.summary-list div,
.detail-list div,
.project-details div {
  display: grid;
  gap: var(--space-1);
}

.summary-list dt {
  color: var(--color-text-secondary);
  font-size: var(--text-metadata);
  font-weight: 500;
}

.detail-list dt,
.project-details dt {
  color: var(--color-text-muted);
  font-size: var(--text-metadata);
  font-weight: 500;
}

.summary-list dd,
.detail-list dd,
.project-details dd {
  margin: 0;
  color: var(--color-text-secondary);
}

.section-intro h2,
.section-heading h2 {
  max-width: 24ch;
  margin-top: var(--space-3);
}

.section-intro > p:not(.overline),
.section-heading > p:not(.overline) {
  max-width: 62ch;
  margin-top: var(--space-4);
  color: var(--color-text-secondary);
  font-family: var(--font-serif);
  font-size: var(--text-body-large);
}

.section-intro > .text-link {
  margin-top: var(--space-6);
}

.section-heading {
  max-width: var(--container-editorial);
  margin-bottom: var(--space-12);
}

.problem-grid {
  display: grid;
  align-items: start;
  gap: var(--space-12) var(--grid-gutter);
}

.problem-item {
  padding-top: var(--space-6);
  border-top: var(--border-standard);
}

.problem-item h3 {
  font-size: var(--text-h4);
}

.detail-list,
.project-details {
  display: grid;
  gap: var(--space-4);
  margin: var(--space-6) 0 0;
}

.section-transition {
  margin-top: var(--space-16);
  padding-left: var(--space-6);
  border-left: 2px solid var(--color-brand);
  color: var(--color-text-secondary);
  font-family: var(--font-serif);
  font-size: var(--text-lead);
}

.trajectory-list {
  display: grid;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  counter-reset: trajectory;
  list-style: none;
}

.trajectory-item {
  position: relative;
  padding: var(--space-6) var(--space-6) var(--space-6) var(--space-8);
  border-left: 2px solid var(--color-border-strong);
  counter-increment: trajectory;
}

.trajectory-item::before {
  position: absolute;
  top: var(--space-6);
  left: 0;
  width: 1.75rem;
  height: 1.75rem;
  border: var(--border-standard);
  border-radius: var(--radius-round);
  background: var(--color-canvas);
  color: var(--color-brand);
  content: counter(trajectory, decimal-leading-zero);
  font-size: var(--text-note);
  font-weight: 600;
  line-height: 1.625rem;
  text-align: center;
  transform: translateX(-50%);
}

.trajectory-item--key {
  border-left-color: var(--color-brand);
  background: var(--color-brand-soft);
}

.trajectory-item--key::before {
  border-color: var(--color-brand);
  background: var(--color-surface);
}

.trajectory-item h3 {
  margin-top: var(--space-1);
  font-size: var(--text-h4);
}

.trajectory-item > p:not(.metadata) {
  margin-top: var(--space-3);
  color: var(--color-text-secondary);
}

.trajectory-question {
  font-size: var(--text-compact);
}

.project-list {
  display: grid;
  align-items: start;
  gap: var(--grid-gutter);
}

.project-card {
  display: grid;
  gap: var(--space-6);
  padding: var(--space-8);
  border: var(--border-subtle);
  border-radius: var(--radius-3);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast);
}

.project-card:hover {
  border-color: var(--color-border-strong);
}

.project-card h3 {
  font-size: var(--text-h3);
}

.project-details {
  margin-top: 0;
}

.project-card__tools {
  margin-top: var(--space-2);
}

.project-empty {
  display: grid;
  gap: var(--space-4);
  max-width: var(--container-editorial);
  padding: var(--space-8);
  border: var(--border-standard);
  border-radius: var(--radius-3);
  background: var(--color-surface);
}

.project-empty h3 {
  font-size: var(--text-h4);
}

.project-empty p {
  color: var(--color-text-secondary);
}

.approach-list {
  display: grid;
  grid-column: 1 / -1;
  gap: 0;
  margin: 0;
  padding: 0;
  counter-reset: approach;
  list-style: none;
}

.approach-list li {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-8) 0;
  border-top: var(--border-subtle);
  counter-increment: approach;
}

.approach-list li::before {
  color: var(--color-brand);
  content: counter(approach, decimal-leading-zero);
  font-size: var(--text-label);
  font-weight: 600;
}

.approach-list h3 {
  font-size: var(--text-h4);
}

.approach-list p:not(.metadata) {
  color: var(--color-text-secondary);
}

.capability-grid,
.credential-grid {
  display: grid;
  align-items: start;
  gap: var(--space-8) var(--grid-gutter);
}

.capability-item,
.credential-grid article {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-8);
  border-top: var(--border-standard);
}

.capability-item--accent {
  border-top-color: var(--color-brand);
  background: var(--color-brand-soft);
}

.capability-item--exploration {
  border-top-color: var(--color-exploration);
  background: var(--color-exploration-soft);
}

.capability-item h3,
.credential-grid h3,
.learning-item h3 {
  font-size: var(--text-h4);
}

.capability-item > p:not(.metadata),
.credential-grid article > p:not(.metadata),
.learning-item p {
  color: var(--color-text-secondary);
}

.credential-list {
  display: grid;
  gap: var(--space-3);
  padding-left: var(--space-6);
  color: var(--color-text-secondary);
}

.credential-list li::marker {
  color: var(--color-brand);
}

.learning-item {
  display: grid;
  align-items: start;
  gap: var(--space-8) var(--grid-gutter);
  padding-block: var(--space-12);
  border-block: var(--border-standard);
}

.learning-item > div {
  display: grid;
  gap: var(--space-3);
}

.learning-evidence {
  padding: var(--space-6);
  background: var(--color-brand-soft);
}

.contact .overline {
  margin-bottom: var(--space-3);
}

.contact__copy {
  margin-top: var(--space-6);
  color: var(--color-text-secondary);
  font-family: var(--font-serif);
  font-size: var(--text-lead);
}

.contact__copy + p {
  margin-top: var(--space-4);
  color: var(--color-text-secondary);
}

.contact__actions {
  justify-content: center;
}

.contact__actions + p {
  margin-top: var(--space-6);
}

.contact__status {
  min-height: 1.75rem;
  margin-top: var(--space-3);
  color: var(--color-valid);
  font-size: var(--text-compact);
  font-weight: 500;
}

@media (min-width: 48rem) {
  .hero__grid,
  .split-layout,
  .trajectory-layout {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .hero__message {
    grid-column: span 5;
    padding-right: var(--space-4);
  }

  .hero-summary {
    grid-column: span 3;
  }

  .section-intro {
    grid-column: span 3;
  }

  .problem-grid,
  .trajectory-list {
    grid-column: span 5;
  }

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

  .trajectory-layout > .section-actions {
    grid-column: 4 / -1;
  }

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

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

  .learning-evidence {
    grid-column: span 2;
  }
}

@media (min-width: 64rem) {
  .hero__grid,
  .split-layout,
  .trajectory-layout {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .hero__message {
    grid-column: span 8;
    padding-right: var(--space-8);
  }

  .hero-summary {
    grid-column: span 4;
    padding: var(--space-8);
  }

  .section-intro {
    grid-column: span 4;
  }

  .problem-grid,
  .trajectory-list,
  .approach-list {
    grid-column: span 8;
  }

  .trajectory-layout > .section-actions {
    grid-column: 5 / -1;
  }

  .project-list {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .project-card--featured {
    grid-column: span 7;
  }

  .project-card:not(.project-card--featured) {
    grid-column: span 5;
  }

  .credential-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .credential-grid article:nth-child(1),
  .credential-grid article:nth-child(3),
  .credential-grid article:nth-child(6) {
    grid-column: span 4;
  }

  .credential-grid article:nth-child(2),
  .credential-grid article:nth-child(4),
  .credential-grid article:nth-child(5) {
    grid-column: span 8;
  }

  .learning-item {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .learning-item > div:first-child,
  .learning-item > div:last-child {
    grid-column: span 3;
  }

  .learning-evidence {
    grid-column: span 6;
  }
}

@media (max-width: 47.999rem) {
  .hero {
    min-height: auto;
    padding-block: var(--space-16);
  }

  .hero__actions,
  .contact__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero__actions .button,
  .hero__actions .text-link,
  .contact__actions .button,
  .contact__actions .text-link {
    width: 100%;
    justify-content: center;
  }

  .project-card {
    padding: var(--space-6);
  }

  .capability-item,
  .credential-grid article,
  .project-empty,
  .learning-evidence {
    padding: var(--space-6);
  }

  .approach-list li {
    padding-block: var(--space-6);
  }

  .section-transition {
    margin-top: var(--space-12);
  }
}

@media (max-width: 30rem) {
  .trajectory-item {
    padding-right: 0;
  }
}