/* Schedule, assignment and milestone tables */

/* Wide tables scroll sideways inside this region on small screens. The
   region is focusable (tabindex="0" in the HTML) so keyboard users can
   scroll it too. */
.table-scroll {
  width: 100%;
  overflow-x: auto;
  margin: var(--spacing-md) 0 var(--spacing-lg);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.table-scroll:focus-visible {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

.data-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  background: var(--color-bg);
}

.data-table caption {
  text-align: left;
  padding: 0 0 var(--spacing-sm);
  color: var(--color-muted-text);
  font-size: 0.9rem;
}

/* A caption that repeats the h2 above it: kept for screen readers only */
.visually-hidden,
.data-table caption.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;
}

.data-table th,
.data-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid #e3e7ea;
}

/* Header row: primary slate, not accent blue (white on accent is 3.3:1) */
.data-table thead th {
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 600;
  border-bottom: none;
}

.data-table tbody tr:hover > * {
  background: var(--color-surface);
}

/* Date cells are row headers: read like body text, not like column headers */
.data-table tbody th[scope="row"] {
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

/* Week headers: one per <tbody> */
.data-table .week-row th {
  background: var(--color-accent-light);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1rem;
}

.data-table .cancelled > * {
  background: var(--color-cancel);
}

.data-table .cancelled:hover > * {
  background: var(--color-cancel);
}

.data-table .col-date { width: 8.5rem; }
.data-table .col-due  { width: 12rem; }

.data-table ul.due-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.data-table ul.due-list li + li {
  margin-top: var(--spacing-mini);
}

.data-table .empty {
  color: var(--color-muted-text);
  font-style: italic;
}

/* Phones: fit the width instead of scrolling, so the Assignments column
   (the one students most need) stays in view */
@media (max-width: 600px) {
  .data-table {
    min-width: 0;
    font-size: 0.9rem;
  }

  .data-table th,
  .data-table td {
    padding: var(--spacing-sm);
  }

  .data-table .col-date { width: 5.5rem; }
  .data-table .col-due  { width: auto; }

  .data-table tbody th[scope="row"] {
    white-space: normal;
  }

  .data-table .tag {
    white-space: normal;
  }
}

.data-table .exam > * {
  background: var(--color-exam);
}

.data-table .exam:hover > * {
  background: var(--color-exam);
}

.data-table .exam .tag-exam {
  background-color: var(--color-bg);
}