:root {
  --ink: #14201c;
  --muted: #5a6b64;
  --paper: #f3efe6;
  --paper-2: #e7e1d4;
  --line: #cfc6b6;
  --accent: #0f5c4c;
  --accent-soft: #d7ebe4;
  --lecture: #9b2c2c;
  --demo: #1d4f91;
  --training: #2f6b3a;
  --exam: #6b4c1e;
  --intro: #5a5a5a;
  --shadow: 0 1px 0 rgba(20, 32, 28, 0.06);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --max: 46rem;
  --wide: 68rem;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #dce8e2 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #efe6d4 0%, transparent 50%),
    var(--paper);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
}

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: #0a4035; }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  background: white;
  padding: 0.5rem 0.75rem;
}

.wrap {
  width: min(100% - 2rem, var(--wide));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--paper) 86%, white);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.4rem;
  background: var(--accent);
  color: #f7faf8;
  font-family: var(--font-display);
  font-weight: 650;
  letter-spacing: 0.02em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand-text strong { font-family: var(--font-display); font-weight: 650; }
.brand-text span { color: var(--muted); font-size: 0.9rem; }

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}
.nav a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}
.nav a[aria-current="page"],
.nav a:hover {
  border-bottom-color: var(--accent);
}

main.wrap { padding: 2rem 0 4rem; }

.page-header { margin-bottom: 1.75rem; max-width: var(--max); }
.page-header h1 {
  margin: 0.2rem 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.lede { margin: 0; color: var(--muted); font-size: 1.12rem; max-width: 40rem; }
.eyebrow {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}
.eyebrow a { color: inherit; }

.hero {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  max-width: 42rem;
}
.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}
.hero .lede { font-size: 1.2rem; }
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  border-radius: 0.35rem;
  background: var(--accent);
  color: #f4faf8;
  text-decoration: none;
  font-weight: 600;
}
.btn:hover { color: #fff; background: #0a4035; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: white; color: var(--ink); }

.section { margin: 2.5rem 0; }
.section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
}
.section > p { max-width: var(--max); color: var(--muted); }

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.9rem;
  margin-top: 1rem;
}
.card-link {
  display: block;
  padding: 1rem 1.1rem;
  background: color-mix(in srgb, white 70%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 0.45rem;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
}
.card-link:hover { border-color: var(--accent); }
.card-link strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}
.card-link span { color: var(--muted); font-size: 0.95rem; }

.panel {
  background: color-mix(in srgb, white 65%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  padding: 1rem 1.15rem;
  margin: 1.25rem 0;
  max-width: 48rem;
}
.panel h2, .panel h3 { margin-top: 0; font-family: var(--font-display); }

.meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 0.75rem 1rem;
  margin: 1rem 0 0;
  padding: 0;
}
.meta div {
  margin: 0;
  padding: 0.65rem 0.75rem;
  background: color-mix(in srgb, white 70%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  min-width: 0;
  overflow-wrap: anywhere;
}
.meta dt {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}
.meta dd { margin: 0.15rem 0 0; }
.meta dd a { overflow-wrap: anywhere; }

.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background: var(--paper-2);
  color: var(--ink);
}
.tag-lecture { background: #f3d6d6; color: var(--lecture); }
.tag-demo { background: #d6e3f5; color: var(--demo); }
.tag-training { background: #d7ead9; color: var(--training); }
.tag-exam { background: #efe0c4; color: var(--exam); }
.tag-mixed { background: #e5e0f0; color: #4a3f6b; }
.tag-guide { background: var(--accent-soft); color: var(--accent); }
.tag-introduce { background: #e8e8e8; color: var(--intro); }
.tag-foundation { background: #e8e4d8; color: #4d4635; }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0.75rem 0 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.schedule {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.98rem;
  background: color-mix(in srgb, white 75%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  overflow: hidden;
}
.schedule th,
.schedule td {
  text-align: left;
  vertical-align: top;
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--line);
}
.schedule th {
  background: #e8e2d5;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.schedule tr:last-child td { border-bottom: 0; }
.schedule tr.saturday { background: #fff8d9; }
.schedule a { font-weight: 600; text-decoration: none; }
.schedule a:hover { text-decoration: underline; }
.schedule .subject-list { margin: 0.35rem 0 0; padding-left: 1.1rem; color: var(--muted); }
.kind-lecture .subject-title { color: var(--lecture); }
.kind-demo .subject-title { color: var(--demo); }
.kind-training .subject-title { color: var(--training); }

.place-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 0.55rem;
}
.place-list a {
  display: block;
  padding: 0.7rem 0.85rem;
  background: color-mix(in srgb, white 70%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  text-decoration: none;
  color: inherit;
  font-weight: 600;
}
.place-list a:hover { border-color: var(--accent); }
.place-list .hint {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-weight: 400;
  font-size: 0.88rem;
}

.session-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.55rem;
}
.session-list a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem 1rem;
  align-items: start;
  padding: 0.85rem 1rem;
  background: color-mix(in srgb, white 70%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  text-decoration: none;
  color: inherit;
}
.session-list a:hover { border-color: var(--accent); }
.session-list .date {
  font-weight: 600;
  color: var(--muted);
  min-width: 7.5rem;
}
.session-list strong { font-family: var(--font-display); font-size: 1.08rem; }
.session-list .sub { color: var(--muted); font-size: 0.92rem; margin-top: 0.15rem; }

.empty {
  padding: 1rem 1.1rem;
  border: 1px dashed var(--line);
  border-radius: 0.4rem;
  background: color-mix(in srgb, white 50%, var(--paper));
  color: var(--muted);
}
.empty code {
  font-size: 0.88em;
  background: var(--paper-2);
  padding: 0.1rem 0.35rem;
  border-radius: 0.25rem;
}

.notes-body { max-width: var(--max); }
.notes-body h2 {
  font-family: var(--font-display);
  margin-top: 1.75rem;
}

.prose { max-width: var(--max); }
.prose h2, .prose h3 { font-family: var(--font-display); }
.prose ul { padding-left: 1.2rem; }
.muted { color: var(--muted); }
.note-callout {
  border-left: 3px solid var(--accent);
  padding: 0.35rem 0 0.35rem 0.9rem;
  margin: 1rem 0;
  color: var(--muted);
}

.contacts {
  display: grid;
  gap: 0.75rem;
  max-width: 32rem;
}
.contacts div {
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  background: color-mix(in srgb, white 70%, var(--paper));
}
.contacts strong { display: block; font-family: var(--font-display); }

.handout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}
.handout-grid a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  overflow: hidden;
  background: white;
  text-decoration: none;
  color: inherit;
}
.handout-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top;
}
.handout-grid span {
  display: block;
  padding: 0.55rem 0.7rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-top: 1px solid var(--line);
}

.cite {
  font-size: 0.75em;
  font-weight: 600;
  margin-left: 0.1em;
}
.cite a {
  text-decoration: none;
  color: var(--accent);
  padding: 0 0.15em;
  border-radius: 0.2rem;
  background: var(--accent-soft);
}
.cite a:hover { text-decoration: underline; }
.cite-missing {
  color: var(--lecture);
  background: #f3d6d6;
  padding: 0 0.2em;
  border-radius: 0.2rem;
}

.source-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.55rem;
}
.source-list a {
  display: block;
  padding: 0.85rem 1rem;
  background: color-mix(in srgb, white 70%, var(--paper));
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  text-decoration: none;
  color: inherit;
}
.source-list a:hover { border-color: var(--accent); }
.source-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.08rem;
}
.source-list .sub {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.sources-used { margin-top: 2.5rem; max-width: var(--max); }
.sources-used h2 { font-family: var(--font-display); }

.related-chips {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.related-chips a {
  display: inline-block;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  color: inherit;
  font-size: 0.9rem;
  background: white;
}
.related-chips a:hover { border-color: var(--accent); }

.cross-links h2 {
  margin-top: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.source-media { margin: 1.5rem 0; }
.source-media h2 { font-family: var(--font-display); }
.source-media .file-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
}
.source-media .file-list a { font-weight: 600; }
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  gap: 0.85rem;
  margin-top: 0.75rem;
}
.media-grid figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  overflow: hidden;
  background: white;
}
.media-grid img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}
.media-grid figcaption {
  padding: 0.5rem 0.7rem;
  font-size: 0.88rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}
.media-grid .file-link {
  display: block;
  padding: 1.25rem 1rem;
  font-weight: 600;
}

.tag-scan,
.tag-handwritten-photo,
.tag-text,
.tag-typed,
.tag-mixed { background: #e8e4d8; color: #4d4635; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-inner p { margin: 0.25rem 0; max-width: 40rem; }

.table-wrap { overflow-x: auto; margin: 1rem 0 1.5rem; }

@media (max-width: 640px) {
  .session-list a { grid-template-columns: 1fr; gap: 0.25rem; }
  .schedule th:nth-child(4),
  .schedule td:nth-child(4) { display: none; }
}