:root {
  color-scheme: light;
  --bg: #ffffff;
  --ink: #202124;
  --muted: #666a70;
  --line: #dedede;
  --soft: #f5f5f3;
  --link: #245f7a;
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
  text-decoration-thickness: 0.06em;
  text-underline-offset: 0.18em;
}

a:hover { color: var(--ink); }
img { display: block; max-width: 100%; }

.masthead {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.masthead-inner {
  width: min(var(--max-width), calc(100% - 2rem));
  min-height: 4.5rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-title {
  color: var(--ink);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  text-decoration: none;
}

.masthead nav {
  display: flex;
  gap: 1.6rem;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.95rem;
}

.masthead nav a {
  color: var(--muted);
  text-decoration: none;
}

.masthead nav a.active {
  color: var(--ink);
  font-weight: 700;
}

.page-grid {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 3.6rem 0 5rem;
  display: grid;
  grid-template-columns: minmax(13rem, 16rem) minmax(0, 1fr);
  gap: clamp(3rem, 7vw, 6rem);
  align-items: start;
}

.author-profile {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.author-avatar {
  width: 11rem;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  background: var(--soft);
  border: 1px solid var(--line);
}

.author-content h2 {
  margin: 1.25rem 0 0.2rem;
  font-size: 1.18rem;
  line-height: 1.25;
}

.author-content p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

.author-links {
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  list-style: none;
  font-size: 0.9rem;
  line-height: 1.45;
}

.author-links a { text-decoration: none; }
.author-links span {
  display: inline-block;
  width: 1.35rem;
  color: var(--muted);
}

.page-content { width: min(100%, 760px); }

.page-title {
  margin: 0 0 2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.page-content p { margin: 0 0 1.2rem; }

.page-content h2 {
  margin: 2.6rem 0 1rem;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.55rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.interest-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.86rem;
}

.interest-list li {
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  background: var(--soft);
}

.section-heading-row {
  margin-top: 2.8rem;
  padding-bottom: 0.7rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
}

.section-heading-row h2 { margin: 0; }
.section-heading-row a {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.88rem;
}

.archive-list,
.course-list { display: grid; }

.archive-item,
.course-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}

.archive-item h2,
.archive-item h3,
.course-item h2 {
  margin: 0 0 0.35rem;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1.08rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.archive-item p,
.course-item p {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

.empty-state {
  margin-top: 1.5rem;
  padding: 1.2rem 1.3rem;
  border-left: 3px solid var(--ink);
  background: var(--soft);
  color: var(--muted);
}

.edit-link {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.85rem;
}

.site-footer {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.4rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 0.82rem;
}

@media (max-width: 760px) {
  .masthead-inner {
    padding: 1rem 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.7rem;
  }

  .masthead nav { gap: 1rem; }

  .page-grid {
    padding-top: 2.2rem;
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .author-profile {
    display: grid;
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 0 1.2rem;
  }

  .author-avatar {
    width: 7rem;
    grid-row: 1 / span 2;
  }

  .author-content h2 { margin-top: 0; }
  .author-links { margin-top: 0.7rem; }
}

@media (max-width: 480px) {
  .author-profile { grid-template-columns: 1fr; }
  .author-avatar { grid-row: auto; }
  .author-content h2 { margin-top: 1rem; }
}