:root {
  --font-body: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;

  /* Primary — maroon */
  --maroon: #881c1c;
  --maroon-dark: #5c1010;
  --maroon-mid: #6b1515;
  --maroon-light: #f3e8e8;
  --maroon-soft: #faf6f6;
  --maroon-muted: #c48787;
  --maroon-tint: rgba(136, 28, 28, 0.07);
  --maroon-border: rgba(136, 28, 28, 0.14);

  /* Accent palettes — text variants meet WCAG AA (4.5:1) on their -50 backgrounds */
  --accent-bronze-50: #faf4ec;
  --accent-bronze-700: #6b4423;
  --accent-bronze-border: #dcc9a8;
  --accent-rust-50: #faf2ee;
  --accent-rust-700: #8a3f28;
  --accent-rust-border: #e8cfc4;
  --accent-plum-50: #f8f2f6;
  --accent-plum-700: #5c2f4e;
  --accent-plum-border: #e2d0dc;
  --accent-teal-50: #eff6f6;
  --accent-teal-700: #245959;
  --accent-teal-border: #c5dede;
  --accent-gold-50: #fdf6e8;
  --accent-gold-700: #6b5109;
  --accent-gold-border: #e8d49a;

  /* Warm neutrals */
  --cream: #faf9f7;
  --stone: #f0eeea;
  --stone-dark: #ddd9d4;
  --ink: #1a1a1a;
  --ink-muted: #4a4a4a;
  --ink-light: #6b6560;

  /* Semantic tokens */
  --slate: var(--accent-rust-50);
  --slate-border: var(--accent-rust-border);
  --text: var(--ink);
  --text-muted: var(--ink-muted);
  --text-on-dark: var(--maroon-light);
  --bg: var(--stone);
  --surface: #ffffff;
  --surface-raised: var(--cream);
  --surface-accent: var(--maroon-soft);
  --border: var(--stone-dark);
  --border-strong: #c4bdb4;
  --link: var(--maroon-mid);
  --link-hover: var(--maroon-dark);
  --link-visited: #5c1010;
  --note-bg: var(--accent-gold-50);
  --note-border: var(--accent-gold-border);
  --note-text: var(--accent-gold-700);
  --shadow: 0 1px 3px rgba(26, 26, 26, 0.06);
  --shadow-maroon: 0 2px 8px rgba(136, 28, 28, 0.08);
  --radius: 8px;
  --max-width: 1280px;
  --line-body: 1.55;
  --focus-ring: 0 0 0 3px rgba(136, 28, 28, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: var(--line-body);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--maroon);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 4px 0;
}

.skip-link:focus {
  left: 0;
  outline: none;
  box-shadow: var(--focus-ring);
}

a {
  color: var(--link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--link-hover);
}

a:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 2px;
}

a:visited {
  color: var(--link-visited);
}

.page-main a,
.page-guide a,
.breadcrumb a,
.textbook-banner a,
.details-body a {
  text-decoration: underline;
}

.nav-list a,
.quick-card,
.header-left h1 a,
.site-logo {
  text-decoration: none;
}

.site-header,
.site-top,
.page-main,
.site-footer {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.75rem 1rem 0.65rem;
  background: linear-gradient(to bottom, var(--cream) 0%, var(--surface) 100%);
  border-bottom: 3px solid var(--maroon);
  box-shadow: var(--shadow-maroon);
}

.header-left h1 {
  margin: 0 0 0.2rem;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.25;
}

.header-left h1 a {
  color: var(--maroon);
  text-decoration: none;
}

.header-left h1 a:hover,
.header-left h1 a:focus {
  color: var(--maroon-dark);
  text-decoration: underline;
}

.header-meta {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.header-left a {
  color: var(--text-muted);
  text-decoration: none;
}

.header-left a:hover,
.header-left a:focus {
  color: var(--maroon);
  text-decoration: underline;
}

.header-right {
  flex-shrink: 0;
}

.site-logo {
  display: block;
  width: 160px;
  max-width: 100%;
  height: auto;
}

.site-top {
  position: sticky;
  top: 0;
  z-index: 10;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
  background: var(--surface-raised);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(26, 26, 26, 0.04);
}

.site-nav {
  padding: 0;
}

.site-nav .nav-list {
  margin-top: 0.4rem;
}

.textbook-banner {
  margin: 0.3rem 0 0.4rem;
  padding: 0;
}

.textbook-banner p {
  margin: 0;
  padding: 0.4rem 0.65rem;
  background: var(--accent-gold-50);
  border: 1px solid var(--accent-gold-border);
  border-radius: 4px;
  font-size: 0.875rem;
  line-height: 1.4;
  max-width: none;
}

.textbook-banner a {
  font-weight: 600;
}

.textbook-free {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--maroon);
  background: var(--maroon-light);
  border-radius: 4px;
}

.textbook-banner-compact p {
  padding: 0.3rem 0.55rem;
  font-size: 0.8rem;
  border: 1px solid var(--accent-gold-border);
  background: var(--accent-gold-50);
}

.page-main > .page-guide {
  margin: 0 0 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--maroon-light);
  border-left: 3px solid var(--maroon);
  border-radius: 0 4px 4px 0;
  font-size: 0.9375rem;
  line-height: 1.5;
  max-width: none;
}

.page-main > .page-guide a {
  font-weight: 600;
}

.breadcrumb {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.breadcrumb a {
  font-weight: 500;
}

.breadcrumb [aria-current="page"] {
  color: var(--text);
  font-weight: 600;
}

.nav-list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0.3rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.nav-list a {
  display: block;
  padding: 0.35rem 0.75rem;
  color: var(--text);
  text-decoration: none;
  border-radius: 4px;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-list a:hover {
  background: var(--maroon-light);
  color: var(--maroon);
}

.nav-list a:focus-visible {
  background: var(--maroon-light);
  color: var(--maroon);
  outline: 2px solid var(--maroon);
  outline-offset: 1px;
}

.nav-list a[aria-current="page"] {
  background: var(--maroon-dark);
  color: #fff;
  font-weight: 600;
}

.nav-list a[aria-current="page"]:hover,
.nav-list a[aria-current="page"]:focus {
  background: var(--maroon-dark);
  color: #fff;
}

.nav-list a.nav-key {
  font-weight: 600;
}

.page-main {
  padding: 0.5rem 1rem 1rem;
}

.page-main section {
  margin-bottom: 0.75rem;
  padding: 0.75rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.page-calendar .calendar-section {
  padding: 0.45rem 0.55rem;
  margin-bottom: 0;
  background: var(--slate);
  border-color: var(--slate-border);
}

.page-assignments section {
  background: var(--accent-bronze-50);
  border-color: var(--accent-bronze-border);
}

.page-home .essentials-section {
  background: var(--surface-raised);
}

.page-home .policies-section {
  background: var(--surface);
}

.page-staff section {
  background: var(--accent-plum-50);
  border-color: var(--accent-plum-border);
}

.page-main section:last-child {
  margin-bottom: 0;
}

h2 {
  margin: 0 0 0.5rem;
  padding-bottom: 0.3rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--maroon);
  border-bottom: 2px solid var(--maroon-light);
  line-height: 1.3;
}

h3,
.sub-heading {
  font-family: var(--font-heading);
}

.page-main p,
.page-main li,
.details-body p {
  max-width: 72ch;
}

.page-main section > ul,
.essentials-section ul {
  max-width: 72ch;
}

.page-main section:first-of-type h2 {
  margin-top: 0;
}

.page-main section.quick-access {
  background: var(--surface-accent);
  border: 1px solid var(--maroon-border);
  border-left: 3px solid var(--maroon);
  color: var(--text);
  box-shadow: none;
}

.page-main section.quick-access h2 {
  color: var(--maroon);
  border-bottom-color: var(--maroon-border);
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.35rem;
  margin-bottom: 0.35rem;
}

.quick-card {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  padding: 0.4rem 0.55rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius);
  color: #fff;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.15s ease;
}

.quick-card:hover,
.quick-card:focus-visible {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
  transform: translateY(-2px);
}

.quick-card:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* Each card carries its own accent, so reordering them in the HTML cannot
   shuffle the colours the way :nth-child() did. */
.quick-card-primary {
  --card-accent: var(--maroon);
  --card-tint: var(--maroon-light);
  background: var(--surface);
  border-color: var(--border);
  border-left: 3px solid var(--card-accent);
  color: var(--card-accent);
  box-shadow: var(--shadow);
}

.quick-card--work {
  --card-accent: var(--accent-bronze-700);
  --card-tint: var(--accent-bronze-50);
}

.quick-card--staff {
  --card-accent: var(--accent-plum-700);
  --card-tint: var(--accent-plum-50);
}

.quick-card-primary:hover,
.quick-card-primary:focus-visible {
  background: var(--card-tint);
  color: var(--card-accent);
}

.quick-card-primary:focus-visible {
  outline: 2px solid var(--card-accent);
  outline-offset: 2px;
}

.quick-label {
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.25;
}

.quick-desc {
  font-size: 0.78rem;
  opacity: 0.9;
  line-height: 1.3;
}

.quick-card-primary .quick-desc {
  color: var(--text-muted);
  opacity: 1;
}

.page-main section.quick-access .at-a-glance {
  list-style: none;
  margin: 0;
  padding: 0.35rem 0 0;
  border-top: 1px solid var(--maroon-border);
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.85rem;
  font-size: 0.85rem;
  line-height: 1.45;
  color: var(--text-muted);
  max-width: none;
}

.page-main section.quick-access .at-a-glance li {
  margin: 0;
  max-width: none;
  color: var(--text-muted);
}

.page-main section.quick-access .at-a-glance strong {
  color: var(--text);
  font-weight: 600;
}

.page-main section.quick-access .at-a-glance a {
  color: var(--link);
  font-weight: 600;
}

.page-main section.quick-access .at-a-glance a:hover,
.page-main section.quick-access .at-a-glance a:focus {
  color: var(--link-hover);
}

.staff-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.staff-instructor-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.staff-tas {
  margin-top: 0.15rem;
}

.staff-instructor {
  padding: 0.4rem 0.55rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.staff-instructor-list .staff-instructor:first-child {
  border-left: 3px solid var(--maroon);
}

.staff-instructor-list .staff-instructor:last-child {
  border-left: 3px solid var(--accent-plum-700);
}

.staff-instructor .staff-name {
  margin: 0 0 0.35rem;
}

.staff-instructor .staff-details dt {
  margin: 0.4rem 0 0.1rem;
}

.staff-instructor .staff-details dt:first-child {
  margin-top: 0;
}

.staff-instructor .staff-details dd {
  padding-bottom: 0.35rem;
}

.staff-instructor .staff-details dd:last-child {
  padding-bottom: 0;
}

.staff-name {
  margin: 0 0 0.5rem;
}

.grading-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem 1.25rem;
  align-items: start;
  margin-bottom: 0.5rem;
}

.grading-main p {
  margin-top: 0;
}

.grading-aside {
  padding: 0.55rem 0.7rem;
  background: var(--accent-rust-50);
  border: 1px solid var(--accent-rust-border);
  border-left: 3px solid var(--accent-rust-700);
  border-radius: 4px;
}

.grading-aside p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-muted);
  max-width: none;
}

.essentials-section ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.15rem 1rem;
  margin-bottom: 0;
  max-width: none;
}

.syllabus-extra {
  margin-top: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface-raised);
}

.syllabus-extra summary {
  padding: 0.45rem 0.65rem;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  color: var(--maroon-mid);
}

.syllabus-extra summary:hover {
  background: var(--maroon-tint);
}

.syllabus-extra .details-body {
  padding: 0.5rem 0.65rem 0.65rem;
  font-size: 0.88rem;
  border-top: 1px solid var(--border);
}

.page-home section.quick-access {
  padding: 0.45rem 0.6rem;
  margin-bottom: 0.6rem;
}

.page-home section.quick-access h2 {
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
  padding-bottom: 0;
  border-bottom: none;
}

.page-assignments .split-grid,
.page-detail section {
  margin-top: 0;
}

.page-detail section h2 {
  margin-top: 0;
}

.policies-intro {
  margin: 0 0 0.75rem;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.policies-section details {
  margin-bottom: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-raised);
}

.policies-section summary {
  padding: 0.7rem 1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  color: var(--maroon-mid);
}

.policies-section summary:hover {
  background: var(--maroon-tint);
}

.policies-section summary::-webkit-details-marker {
  display: none;
}

.policies-section summary::before {
  content: "+ ";
  color: var(--maroon);
  font-weight: 700;
}

.policies-section details[open] summary::before {
  content: "− ";
}

.policies-section details[open] summary {
  border-bottom: 1px solid var(--border);
}

.details-body {
  padding: 0.85rem 1rem 1rem;
}

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

.sub-heading {
  margin: 0 0 0.65rem;
  font-size: 1.1rem;
  color: var(--maroon);
}

.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}


.page-main p,
.page-main ul {
  margin: 0 0 0.55rem;
}

.page-main p:last-child,
.page-main ul:last-child {
  margin-bottom: 0;
}

.page-main ul {
  padding-left: 1.25rem;
}

.page-main li {
  margin-bottom: 0.35rem;
}

.link-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.link-list li {
  margin: 0;
}

.link-list a {
  display: block;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--maroon-muted);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.link-list a:hover,
.link-list a:focus {
  background: var(--maroon-light);
  border-color: var(--maroon);
  color: var(--maroon);
}

.page-assignments .split-grid > div:first-child .sub-heading {
  color: var(--maroon);
}

.page-assignments .split-grid > div:last-child .sub-heading {
  color: var(--accent-bronze-700);
}

.page-assignments .split-grid > div:first-child .link-list a {
  border-left-color: var(--maroon);
}

.page-assignments .split-grid > div:last-child .link-list a {
  border-left-color: var(--accent-bronze-700);
}

.page-assignments .split-grid > div:first-child .link-list a:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 1px;
}

.page-assignments .split-grid > div:last-child .link-list a:hover,
.page-assignments .split-grid > div:last-child .link-list a:focus-visible {
  background: var(--accent-bronze-50);
  border-color: var(--accent-bronze-700);
  color: var(--accent-bronze-700);
}

.page-assignments .split-grid > div:last-child .link-list a:focus-visible {
  outline: 2px solid var(--accent-bronze-700);
  outline-offset: 1px;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 0.35rem;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.table-caption {
  caption-side: top;
  padding: 0.4rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  text-align: left;
  color: var(--text-muted);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  max-width: none;
}

table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 0.9375rem;
  line-height: 1.45;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 0.4rem 0.55rem;
  vertical-align: top;
  text-align: left;
}

th {
  font-family: var(--font-heading);
  font-weight: 700;
  background: var(--maroon);
  color: #fff;
  border-bottom: none;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) {
  background: var(--cream);
}

tbody tr:hover td {
  background: var(--maroon-light);
}

td.week-cell {
  width: 4.5rem;
  min-width: 4.5rem;
  text-align: center;
  font-weight: 700;
  color: var(--maroon);
  background: var(--maroon-soft);
  vertical-align: middle;
}

.entry-date {
  display: inline-block;
  font-weight: 700;
  color: var(--maroon);
  font-size: 0.88rem;
}

.entry-content {
  margin-top: 0.1rem;
  line-height: 1.35;
}

.entry-line {
  margin-top: 0.2rem;
  font-size: 0.8rem;
}

.entry-line a {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--maroon);
  background: var(--maroon-light);
  border-radius: 4px;
  text-decoration: none;
}

.entry-line a:hover,
.entry-line a:focus {
  background: var(--maroon);
  color: #fff;
}

.note {
  display: inline-block;
  margin-top: 0.2rem;
  padding: 0.1rem 0.35rem;
  font-weight: 600;
  font-style: normal;
  font-size: 0.72rem;
  color: var(--note-text);
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: 4px;
}

.no-class {
  color: var(--text-muted);
  font-style: italic;
}

.staff-name {
  margin: 0 0 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}

.staff-details {
  margin: 0;
}

.staff-details dt {
  margin: 0.75rem 0 0.15rem;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.staff-details dt:first-child {
  margin-top: 0;
}

.staff-details dd {
  margin: 0;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  word-break: break-word;
}

.staff-details dd:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.back-link {
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
}

.back-link a {
  font-weight: 500;
}

.placeholder-msg {
  margin: 0;
  padding: 1rem;
  background: var(--maroon-tint);
  border: 1px dashed var(--maroon-muted);
  border-radius: var(--radius);
  color: var(--ink-light);
  text-align: center;
}

/* Calendar page — table is the focus */
.page-calendar-main {
  padding-top: 0.35rem;
}

.page-calendar .table-caption {
  background: var(--slate);
  color: var(--ink-light);
}

.page-calendar .calendar-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.35rem;
}

.page-calendar .calendar-toolbar h2 {
  margin: 0;
  padding: 0;
  border: none;
  font-size: 1rem;
}

.page-calendar .schedule-compact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.page-calendar .schedule-highlight {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--maroon);
  background: var(--maroon-soft);
  border: 1px solid var(--maroon-border);
  border-radius: 4px;
}

.page-calendar .schedule-highlight--teal {
  color: var(--accent-teal-700);
  background: var(--accent-teal-50);
  border-color: var(--accent-teal-border);
}

.page-calendar .schedule-highlight strong {
  font-weight: 700;
}

.page-calendar .table-wrap-primary {
  margin-top: 0;
  border: 2px solid var(--maroon);
  border-radius: 4px;
}

.page-calendar .table-wrap-primary table {
  table-layout: auto;
  font-size: 1.05rem;
  line-height: 1.5;
}

.page-calendar .table-wrap-primary th,
.page-calendar .table-wrap-primary td {
  padding: 0.55rem 0.65rem;
}

/* ── Calendar day types ───────────────────────────────────────────────
   Each cell is tinted by what happens that day. The colour only repeats
   what the text already says ("Lab:", "No class"), so nothing depends on
   seeing it. Generic striping and row hover are switched off here because
   they would sit on top of these tints. */

.page-calendar .table-wrap-primary tbody tr:nth-child(even),
.page-calendar .table-wrap-primary tbody tr:hover td {
  background: none;
}

.page-calendar .table-wrap-primary td.week-cell {
  background: var(--maroon-soft);
}

.page-calendar td.day-lecture,
.page-calendar td.day-lab,
.page-calendar td.day-tba,
.page-calendar td.day-off,
.page-calendar td.day-exam {
  border-left: 4px solid transparent;
}

.page-calendar td.day-lecture {
  background: var(--surface);
  border-left-color: var(--maroon);
}

.page-calendar td.day-lab {
  background: var(--accent-teal-50);
  border-left-color: var(--accent-teal-700);
}

.page-calendar td.day-exam {
  background: var(--accent-bronze-50);
  border-left-color: var(--accent-bronze-700);
}

/* Dashed edge reads as "not settled yet" without spending another hue. */
.page-calendar td.day-tba {
  background: var(--cream);
  border-left-style: dashed;
  border-left-color: var(--border-strong);
}

.page-calendar td.day-off {
  background: var(--stone);
  border-left-color: var(--ink-light);
}

.page-calendar td.day-off .entry-date {
  color: var(--text-muted);
}

/* Week 15 has no Thursday meeting; keep the gap neutral rather than letting
   the table's warm tint make it look like something is scheduled. */
.page-calendar .table-wrap-primary td:empty {
  background: var(--stone);
}

.calendar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.1rem;
  margin: 0 0 0.4rem;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.calendar-legend li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.legend-swatch {
  width: 1.1rem;
  height: 0.85rem;
  border: 1px solid var(--border-strong);
  border-left-width: 4px;
  border-radius: 2px;
}

.legend-swatch--lecture {
  background: var(--surface);
  border-left-color: var(--maroon);
}

.legend-swatch--lab {
  background: var(--accent-teal-50);
  border-left-color: var(--accent-teal-700);
}

.legend-swatch--exam {
  background: var(--accent-bronze-50);
  border-left-color: var(--accent-bronze-700);
}

.legend-swatch--tba {
  background: var(--cream);
  border-left-style: dashed;
  border-left-color: var(--border-strong);
}

.legend-swatch--off {
  background: var(--stone);
  border-left-color: var(--ink-light);
}

.page-calendar .table-wrap-primary th:not(:last-child) {
  border-right: 1px solid rgba(255, 255, 255, 0.35);
}

.page-calendar .table-wrap-primary td:not(:last-child) {
  border-right: 1px solid var(--border-strong);
}

.page-calendar .table-wrap-primary th:first-child,
.page-calendar .table-wrap-primary td.week-cell {
  width: 4.5rem;
  min-width: 4.5rem;
  font-size: 1.1rem;
}

.page-calendar .entry-date {
  font-size: 1rem;
}

.page-calendar .entry-content {
  font-size: 1.05rem;
  line-height: 1.45;
}

.page-calendar .entry-line {
  font-size: 0.95rem;
}

.page-calendar .entry-line a {
  font-size: 0.95rem;
  padding: 0.2rem 0.6rem;
}

.page-calendar .note {
  font-size: 0.88rem;
}

.page-calendar .table-caption {
  font-size: 0.95rem;
}

.page-calendar .calendar-notes {
  margin-top: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.page-calendar .calendar-notes summary {
  cursor: pointer;
  font-weight: 500;
  padding: 0.2rem 0;
}

.page-calendar .calendar-notes p {
  margin: 0.25rem 0 0;
}

.page-calendar .site-footer {
  margin-top: 0.75rem;
  padding: 0.5rem;
}

.site-footer {
  margin-top: 0.75rem;
  padding: 0.65rem 1rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-on-dark);
  background: var(--maroon-dark);
  border-top: 3px solid var(--maroon);
}

.site-footer a {
  color: var(--maroon-light);
  font-weight: 600;
}

.site-footer a:hover,
.site-footer a:focus {
  color: var(--surface);
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  display: none;
}

@media (max-width: 900px) {
  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .split-grid,
  .grading-layout {
    grid-template-columns: 1fr;
  }

  .staff-instructor-list {
    grid-template-columns: 1fr;
  }

  .essentials-section ul {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .quick-card:hover,
  .quick-card:focus {
    transform: none;
  }

  .nav-list a,
  .quick-card {
    transition: none;
  }
}

@media (max-width: 720px) {
  .quick-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    flex-direction: column;
    padding: 0.65rem 0.75rem;
  }

  .header-left h1 {
    font-size: 1.2rem;
  }

  .header-right {
    align-self: flex-start;
  }

  .site-logo {
    width: 140px;
  }

  .site-top {
    padding: 0 0.75rem;
  }

  .textbook-banner p {
    font-size: 0.85rem;
  }

  .nav-list {
    justify-content: flex-start;
    gap: 0.15rem;
    padding: 0.4rem;
  }

  .nav-list a {
    padding: 0.4rem 0.65rem;
    font-size: 0.88rem;
  }

  .page-main {
    padding: 0.75rem;
  }

  .page-main section {
    padding: 1rem;
  }

  th,
  td {
    padding: 0.6rem;
    font-size: 0.85rem;
  }
}

/* ── Access gate: sign-in page and session controls ───────────────── */

.page-login .page-main {
  display: flex;
  justify-content: center;
  padding-top: 2.5rem;
}

.login-card {
  width: 100%;
  max-width: 26rem;
  padding: 1.5rem 1.5rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--maroon);
  border-radius: var(--radius);
  box-shadow: var(--shadow-maroon);
}

.login-card h2 {
  margin: 0 0 0.35rem;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--maroon-dark);
}

.login-intro {
  margin: 0 0 1.15rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.login-field {
  margin-bottom: 0.9rem;
}

.login-field label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.login-field input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  color: var(--text);
  background: var(--surface);
  font-family: inherit;
  font-size: 1rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

.login-field input:focus {
  border-color: var(--maroon);
  outline: none;
  box-shadow: var(--focus-ring);
}

.login-submit {
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.6rem 1rem;
  color: #fff;
  background: var(--maroon);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid var(--maroon-dark);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.login-submit:hover {
  background: var(--maroon-dark);
}

.login-submit:focus-visible {
  outline: 2px solid var(--maroon-dark);
  outline-offset: 2px;
}

.login-error {
  margin: 0 0 1rem;
  padding: 0.55rem 0.7rem;
  color: var(--accent-rust-700);
  background: var(--accent-rust-50);
  border: 1px solid var(--accent-rust-border);
  border-radius: 4px;
  font-size: 0.875rem;
}

.login-help {
  margin: 1.1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.nav-session {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  padding-left: 0.75rem;
}

.nav-session-user {
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.nav-session-signout {
  padding: 0.3rem 0.7rem;
  color: var(--maroon-mid);
  background: none;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  border: 1px solid var(--maroon-border);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-session-signout:hover {
  color: var(--maroon-dark);
  background: var(--maroon-light);
}

.nav-session-signout:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 1px;
}

/* Sign-in call to action for visitors who are not logged in. */
.nav-login {
  padding: 0.3rem 0.8rem;
  color: #fff;
  background: var(--maroon-mid);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--maroon-mid);
  border-radius: 4px;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.nav-login:hover {
  color: #fff;
  background: var(--maroon-dark);
  border-color: var(--maroon-dark);
}

.nav-login:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 2px;
}

/* Stand-in shown to signed-out visitors where withheld detail would sit. */
.locked-hint {
  color: var(--text-muted);
  font-style: italic;
}

.locked-hint a {
  color: var(--maroon-mid);
  font-style: normal;
  font-weight: 600;
}

.locked-hint a:hover,
.locked-hint a:focus {
  color: var(--maroon-dark);
}

@media (prefers-reduced-motion: reduce) {
  .login-submit,
  .nav-session-signout,
  .nav-login {
    transition: none;
  }
}

@media (max-width: 720px) {
  .page-login .page-main {
    padding-top: 1.25rem;
  }

  .nav-session {
    margin-left: 0;
    padding-left: 0;
  }
}

/* ── Release gating: locked items and instructor markers ──────────── */

.gate-locked {
  color: var(--ink-light);
  font-style: italic;
}

.gate-when {
  margin-left: 0.35rem;
  padding: 0.05rem 0.35rem;
  color: var(--accent-bronze-700);
  background: var(--accent-bronze-50);
  border: 1px solid var(--accent-bronze-border);
  border-radius: 3px;
  font-size: 0.75rem;
  font-style: normal;
  white-space: nowrap;
}

.link-list li.is-locked {
  opacity: 0.85;
}

.gate-badge {
  margin-left: 0.35rem;
  padding: 0.05rem 0.35rem;
  color: var(--accent-plum-700);
  background: var(--accent-plum-50);
  border: 1px solid var(--accent-plum-border);
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
}

.gate-page-notice h2 {
  margin-top: 0;
  font-family: var(--font-heading);
  color: var(--maroon-dark);
}

.gate-page-message {
  padding: 0.6rem 0.8rem;
  color: var(--accent-bronze-700);
  background: var(--accent-bronze-50);
  border: 1px solid var(--accent-bronze-border);
  border-radius: 4px;
  font-weight: 600;
}

.gate-page-hint {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.gate-admin-notice {
  margin: 0 0 0.75rem;
  padding: 0.5rem 0.7rem;
  color: var(--accent-plum-700);
  background: var(--accent-plum-50);
  border: 1px solid var(--accent-plum-border);
  border-radius: 4px;
  font-size: 0.875rem;
}

.preview-banner {
  padding: 0.45rem 1rem;
  color: #fff;
  background: var(--maroon-mid);
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center;
}

.nav-manage,
.nav-preview {
  padding: 0.3rem 0.7rem;
  color: var(--maroon-mid);
  background: none;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--maroon-border);
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}

.nav-manage:hover,
.nav-preview:hover {
  color: var(--maroon-dark);
  background: var(--maroon-light);
}

.nav-manage:focus-visible,
.nav-preview:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 1px;
}

/* ── Instructor release panel ─────────────────────────────────────── */

.admin-summary {
  margin: 0.5rem 0 0;
  font-weight: 600;
}

.admin-dirty {
  margin: 0 0 0.75rem;
  padding: 0.6rem 0.8rem;
  color: var(--accent-bronze-700);
  background: var(--accent-bronze-50);
  border: 1px solid var(--accent-bronze-border);
  border-radius: 4px;
  font-size: 0.9375rem;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.admin-btn {
  padding: 0.45rem 0.85rem;
  color: var(--maroon-mid);
  background: var(--surface);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid var(--maroon-border);
  border-radius: 4px;
  cursor: pointer;
}

.admin-btn:hover {
  background: var(--maroon-light);
}

.admin-btn:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 1px;
}

.admin-btn-primary {
  color: #fff;
  background: var(--maroon);
  border-color: var(--maroon-dark);
}

.admin-btn-primary:hover {
  background: var(--maroon-dark);
}

.admin-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.admin-setup {
  margin: 1rem 0 1.25rem;
  padding: 0.75rem 0.9rem;
  background: var(--stone);
  border: 1px solid var(--border);
  border-radius: 4px;
}

.admin-setup summary {
  cursor: pointer;
  font-weight: 600;
}

.admin-setup p {
  margin: 0.6rem 0;
  font-size: 0.9375rem;
}

.admin-token-label {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
}

.admin-token {
  display: block;
  width: min(36rem, 100%);
  margin-bottom: 0.5rem;
  padding: 0.35rem 0.5rem;
  font-family: inherit;
  font-size: 0.875rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

.admin-setup-steps {
  margin: 0.5rem 0 0.75rem 1.2rem;
  padding: 0;
  font-size: 0.9375rem;
}

.admin-setup-steps li {
  margin: 0.35rem 0;
}

.admin-publish-error {
  margin: 0.75rem 0 0;
  color: var(--accent-rust-700);
  font-size: 0.9375rem;
  font-weight: 600;
}

.admin-token-nudge {
  margin: 0.75rem 0 0;
  padding: 0.6rem 0.75rem;
  color: var(--accent-rust-700);
  background: var(--surface);
  border: 1px solid var(--accent-rust-700);
  border-radius: 4px;
  font-size: 0.9375rem;
  font-weight: 600;
}

.admin-toast {
  color: var(--accent-teal-700);
  font-size: 0.875rem;
  font-weight: 600;
}

.admin-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  max-width: 34rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.admin-row:last-child {
  border-bottom: none;
}

.admin-row-name {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1 1 12rem;
}

.admin-row-detail {
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.admin-row-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.admin-mode {
  padding: 0.3rem 0.6rem;
  color: var(--text-muted);
  background: var(--surface);
  font-family: inherit;
  font-size: 0.8125rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  cursor: pointer;
}

.admin-mode[aria-pressed="true"] {
  color: #fff;
  background: var(--maroon);
  border-color: var(--maroon-dark);
  font-weight: 600;
}

.admin-mode:focus-visible {
  outline: 2px solid var(--maroon);
  outline-offset: 1px;
}

.admin-date {
  padding: 0.25rem 0.4rem;
  font-family: inherit;
  font-size: 0.8125rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

.admin-date:disabled {
  color: var(--ink-light);
  background: var(--stone);
}

.admin-status {
  min-width: 10rem;
  font-size: 0.8125rem;
  font-weight: 600;
}

.admin-status.is-visible {
  color: var(--accent-teal-700);
}

.admin-week {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0 0 0.75rem;
}

.admin-session {
  min-width: 0;
  margin: 0;
  padding: 0.75rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--maroon);
  border-radius: 4px;
}

.admin-session.day-lab {
  border-left-color: var(--accent-teal-700);
  background: var(--accent-teal-50);
}

.admin-session.day-exam {
  border-left-color: var(--accent-bronze-700);
  background: var(--accent-bronze-50);
}

.admin-session.day-off {
  border-left-color: var(--ink-light);
  background: var(--stone);
}

.admin-session.day-tba {
  border-left-style: dashed;
  border-left-color: var(--border-strong);
  background: var(--cream);
}

.admin-session-title {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
}

.admin-session-grid {
  display: grid;
  grid-template-columns: 10.5rem minmax(8rem, 1fr);
  gap: 0.45rem 0.75rem;
  align-items: end;
  margin-bottom: 0.5rem;
}

.admin-session-grid .admin-field-title {
  grid-column: 1 / -1;
}

.admin-file-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.75rem;
  align-items: end;
  margin-bottom: 0.25rem;
}

.admin-field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.admin-title {
  width: 100%;
  max-width: 28rem;
  min-width: 0;
  box-sizing: border-box;
  padding: 0.3rem 0.45rem;
  font-family: inherit;
  font-size: 0.875rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

.admin-session .admin-title {
  max-width: none;
}

.admin-kind,
.admin-tag-add {
  padding: 0.3rem 0.4rem;
  font-family: inherit;
  font-size: 0.8125rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

.admin-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  margin: 0.35rem 0 0.5rem;
}

.admin-tag {
  padding: 0.15rem 0.45rem;
  color: var(--note-text);
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

.admin-file-name {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

@media (max-width: 720px) {
  .admin-week {
    grid-template-columns: 1fr;
  }

  .admin-row-controls {
    width: 100%;
  }

  .admin-status {
    min-width: 0;
  }
}