/* Course ledger: follows the book's paper, ink and teal palette. */
.course-shell {
  --course-button-ink: var(--panel);
  width: min(1280px, calc(100% - 3rem));
  margin: 3rem auto 5rem;
}
.course-masthead {
  border-top: 4px solid var(--accent);
  border-bottom: 1px solid var(--border);
  padding: 1.8rem 0 1.4rem;
}
.course-masthead h1 {
  font: 400 clamp(2rem, 4vw, 3.6rem)/1.1 var(--font-serif);
  margin: 0.7rem 0;
  letter-spacing: -0.035em;
}
.course-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
[data-course-notice] {
  font-size: 0.88rem;
  min-height: 1.5em;
  padding: 0.8rem 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}
[data-course-notice].course-error {
  color: var(--danger);
  font-weight: 600;
}
.course-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.3rem;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--border);
  padding: 0.4rem 0 1rem;
}
.course-toolbar label {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-right: auto;
}
.course-heading {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  align-items: end;
  margin: 1.8rem 0;
}
.course-heading h2 {
  font: 400 clamp(1.8rem, 3vw, 2.7rem)/1.2 var(--font-serif);
  margin: 0.4rem 0 0;
  letter-spacing: -0.03em;
}
.course-identity {
  font-size: 0.8rem;
  color: var(--muted);
}
.course-shell button,
.course-shell .course-button {
  font: 600 0.86rem/1.3 var(--font-ui);
  border: 1px solid var(--accent-strong);
  border-radius: 3px;
  background: var(--accent-strong);
  color: var(--course-button-ink);
  padding: 0.65rem 1rem;
  cursor: pointer;
  text-decoration: none;
}
[data-theme="dark"] .course-shell,
[data-theme="contrast"] .course-shell {
  --course-button-ink: var(--bg);
}
.course-shell button:hover,
.course-button:hover {
  filter: brightness(1.1);
}
.course-shell button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.course-shell button.course-quiet,
.course-shell button.course-secondary {
  color: var(--accent-strong);
  border-color: var(--border);
  background: transparent;
}
.course-shell :is(button, a, input, select, textarea):focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}
.course-phases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 1rem 0 0;
}
.course-phases button {
  text-align: left;
  border-radius: 0;
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
  font-size: 1rem;
  padding: 1rem 1.2rem;
}
.course-phases button + button {
  border-left: 0;
}
.course-phases button[aria-pressed="true"] {
  background: var(--panel);
  border-top: 3px solid var(--accent);
  padding-top: calc(1rem - 2px);
}
.course-phases span {
  font: 0.75rem var(--font-mono);
  color: var(--accent);
  margin-right: 0.6rem;
}
.course-phases small {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 0.72rem;
  margin: 0.45rem 0 0 2rem;
}
.course-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.8rem;
  padding: 0.7rem 0 0;
}
.course-tabs button {
  background: none;
  color: var(--muted);
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  padding: 0.8rem 0.1rem;
}
.course-tabs button[aria-current] {
  color: var(--accent-strong);
  border-bottom-color: var(--accent);
}
.course-section {
  padding: 1.5rem 2rem 2rem;
  background: var(--panel);
  border: 1px solid var(--border);
  overflow-wrap: anywhere;
}
.course-administration-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0 0 1.5rem;
}
.course-administration-nav > span {
  margin-right: 0.5rem;
}
.course-administration-nav button[aria-current] {
  color: var(--text);
  background: var(--panel);
  border-color: var(--accent);
}
.course-group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 1rem;
}
.course-roster-mapping {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 0 1rem;
}
.course-group-row {
  border: 1px solid var(--border);
  padding: 0.5rem 1.2rem 1.2rem;
  min-width: 0;
}
.course-section h3 {
  margin: 0 0 1rem;
  font: 400 1.6rem/1.25 var(--font-serif);
  letter-spacing: -0.02em;
}
.course-section h4 {
  font-size: 1rem;
  margin: 1.7rem 0 0.7rem;
}
.course-section p {
  line-height: 1.6;
}
.course-section-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.8rem;
}
.course-section-heading h3 {
  margin: 0;
}
.course-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 1.6rem 0;
  border-bottom: 1px solid var(--border);
}
.course-metrics > div {
  padding: 0.3rem 1.5rem 1.3rem 0;
}
.course-metrics > div + div {
  padding-left: 1.5rem;
  border-left: 1px solid var(--border);
}
.course-metrics strong {
  font: 400 2.7rem/1 var(--font-serif);
}
.course-metrics strong span {
  font: 400 1.1rem var(--font-ui);
  color: var(--muted);
}
.course-metrics p {
  font-size: 0.8rem;
  margin-bottom: 0;
  color: var(--muted);
}
.course-deadlines,
.course-deadline-inputs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}
.course-deadlines p {
  font-size: 0.84rem;
  margin: 0 0 1.5rem;
}
.course-deadlines strong {
  display: block;
  margin-bottom: 0.3rem;
}
.course-note {
  padding: 1rem 1.3rem;
  background: var(--bg);
  border-left: 3px solid var(--accent);
  margin: 1.5rem 0;
}
.course-note p:first-child,
.course-note h4:first-child {
  margin-top: 0;
}
.course-table-scroll {
  overflow-x: auto;
  margin: 1.5rem 0;
}
.course-table {
  min-width: 660px;
  overflow-wrap: normal;
  border-collapse: collapse;
  width: 100%;
  font-size: 0.84rem;
  text-align: left;
}
.course-table caption {
  text-align: left;
  font-weight: 700;
  margin-bottom: 0.8rem;
}
.course-table :is(th, td) {
  padding: 0.8rem 0.7rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.course-table thead th {
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.025em;
}
.course-table th:first-child {
  min-width: 9rem;
  padding-left: 0;
}
.course-table small {
  display: block;
  color: var(--muted);
  font-weight: 400;
  margin-top: 0.3rem;
}
.course-table button {
  white-space: nowrap;
  font-size: 0.8rem;
  padding: 0.4rem 0.65rem;
}
.course-table button[data-grade-student] {
  background: transparent;
  color: var(--accent-strong);
  border: 0;
  padding: 0;
  text-align: left;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}
.course-table td:not(:last-child) {
  white-space: nowrap;
}
.course-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.86rem;
  font-weight: 600;
  margin: 1.2rem 0;
}
.course-field small {
  font-weight: 400;
  color: var(--muted);
  line-height: 1.5;
}
.course-shell :is(input:not([type="checkbox"]), textarea, select) {
  font: 400 0.9rem/1.5 var(--font-ui);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.65rem 0.8rem;
  background: var(--bg);
  color: var(--text);
  min-width: 0;
  max-width: 100%;
}
.course-shell textarea {
  resize: vertical;
  width: 100%;
  box-sizing: border-box;
}
.course-shell input[type="file"] {
  width: 100%;
  box-sizing: border-box;
}
.course-field input,
.course-field select {
  box-sizing: border-box;
  width: 100%;
}
.course-inline-field {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0.3rem 0 1.5rem;
  font-size: 0.86rem;
}
.course-check {
  display: flex;
  align-items: start;
  gap: 0.65rem;
  margin: 1rem 0;
  font-size: 0.86rem;
}
.course-check input {
  margin-top: 0.25rem;
  accent-color: var(--accent);
}
.course-form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}
.course-form-actions small,
.course-muted {
  color: var(--muted);
  font-size: 0.85rem;
}
.course-evidence {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: var(--bg);
  padding: 1rem;
  font-size: 0.9rem;
  border-left: 2px solid var(--border);
}
.course-shell code {
  overflow-wrap: anywhere;
  font-size: 0.78rem;
}
.course-shell small code {
  display: block;
  margin-top: 0.3rem;
}
.course-shell details {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}
.course-shell summary {
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
}
.course-grade-form {
  border-top: 3px solid var(--accent);
  margin-top: 3rem;
  padding-top: 1rem;
}
.course-score-grid {
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
}
.course-score-grid legend {
  font-weight: 600;
  font-size: 0.86rem;
}
.course-score-grid label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.86rem;
}
.course-score-grid label:last-child {
  border: 0;
}
.course-score-grid label span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.course-score-grid input {
  width: 4.5rem;
}
.course-lecture,
.course-phase-setup {
  border: 1px solid var(--border);
  margin: 1.8rem 0;
  padding: 0.5rem 1.5rem 1.5rem;
}
.course-shell legend {
  font-weight: 700;
  padding: 0 0.5rem;
}
.course-result {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) 3fr;
  gap: 2rem;
  margin: 1.5rem 0;
}
.course-score {
  font: 400 3rem/1 var(--font-serif);
}
.course-score small {
  font: 400 1.2rem var(--font-ui);
  color: var(--muted);
}
.course-result p {
  font-size: 0.88rem;
}
.course-unmet {
  color: var(--danger);
  font-size: 0.86rem;
  line-height: 1.8;
}
.course-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.course-gallery article {
  border-top: 3px solid var(--accent);
  padding: 0.7rem 1rem 1.3rem;
  background: var(--bg);
}
.course-gallery h4 {
  font: 400 1.4rem var(--font-serif);
  margin: 0.5rem 0;
}
.course-course-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}
.course-course-list button.course-run {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  background: var(--panel);
  color: var(--text);
  border-color: var(--border);
  border-top: 3px solid var(--accent);
  text-align: left;
  padding: 1.5rem;
}
.course-run strong {
  font: 400 1.6rem var(--font-serif);
}
.course-run span {
  font-size: 0.8rem;
  color: var(--muted);
}
.course-shell dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 2rem;
  width: min(800px, calc(100% - 5rem));
  max-height: 80vh;
  overflow: auto;
}
.course-shell dialog::backdrop {
  background: rgb(0 0 0 / 55%);
}
.course-shell dialog pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.75rem;
}
@media (max-width: 760px) {
  .course-shell {
    width: calc(100% - 1.5rem);
    margin-top: 1.5rem;
  }
  .course-section {
    padding: 1.2rem 1rem;
  }
  .course-heading {
    flex-direction: column;
    align-items: start;
    gap: 0.5rem;
  }
  .course-phases button {
    padding: 0.8rem 0.6rem;
    font-size: 0.9rem;
  }
  .course-phases button[aria-pressed="true"] {
    padding-top: calc(0.8rem - 2px);
  }
  .course-phases span {
    display: block;
    margin-bottom: 0.4rem;
  }
  .course-phases small {
    margin-left: 0;
  }
  .course-tabs {
    gap: 0.2rem 0.9rem;
  }
  .course-tabs button {
    font-size: 0.8rem;
  }
  .course-metrics {
    grid-template-columns: 1fr;
  }
  .course-metrics > div + div {
    padding-left: 0;
    border-left: 0;
  }
  .course-deadlines,
  .course-deadline-inputs,
  .course-result,
  .course-gallery,
  .course-course-list {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .course-lecture,
  .course-phase-setup {
    padding: 0.5rem 0.8rem 1rem;
  }
  .course-score-grid {
    padding: 0.3rem 0.7rem;
  }
  .course-toolbar label {
    flex-wrap: wrap;
  }
}
.course-evidence-layout {
  display: grid;
  gap: 1.6rem;
  align-items: start;
}
.course-evidence-layout > * {
  min-width: 0;
}
.course-checklist {
  padding: 1rem;
  border: 1px solid var(--border);
}
.course-checkpoint {
  margin: 1rem 0;
  padding: 0.8rem;
  overflow-wrap: anywhere;
}
.course-checkpoint legend,
.course-checkpoint h5 {
  font-size: 0.9rem;
  font-weight: 650;
}
.course-checkpoint p {
  font-size: 0.84rem;
}
@media (min-width: 960px) {
  .course-evidence-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  }
}
.course-simulation {
  position: sticky;
  top: 0.5rem;
  z-index: 20;
  max-height: 75vh;
  overflow: auto;
  margin: 1rem 0;
  padding: 1rem;
  border: 2px solid var(--accent);
  background: var(--bg);
  box-shadow: 0 2px 10px rgb(0 0 0 / 8%);
}
.course-simulation p {
  margin: 0.35rem 0;
}
.course-simulation form {
  display: grid;
  gap: 0.75rem;
}