/* Weekly course schedule (kursschema.html). Uses tokens from tokens.css. */

/* Loading / error text shown before the schedule is ready */
.schedule-message {
  padding: var(--space-5);
  text-align: center;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

/* Schedule (left) + group filter (right) */
.schedule-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 15rem;
  column-gap: var(--space-4);
  align-items: start;
}

/* Toolbar and grid join the layout grid directly, so the filter panel
   always lines up with the top of the schedule box — however tall the title is */
.schedule-layout__main {
  display: contents;
}

.schedule-layout .schedule-toolbar {
  grid-column: 1;
  grid-row: 1;
}

.schedule-layout .schedule {
  grid-column: 1;
  grid-row: 2;
}

/* Group filter panel */
.group-filter {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  padding: var(--space-4);
  min-width: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.group-filter__title {
  float: left; /* lets the legend sit inside the panel like a normal heading */
  width: 100%;
  padding: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
}

.group-filter__hint {
  clear: both;
  margin-bottom: var(--space-3);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.group-filter__options {
  display: grid;
  gap: var(--space-2);
}

.group-filter__option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background-color 0.15s;
}

.group-filter__option:hover {
  border-color: var(--color-secondary);
}

.group-filter__option:has(input:checked) {
  border-color: var(--color-secondary);
  background: rgb(0 0 0 / 0.05);
  font-weight: 600;
}

.group-filter__option input {
  width: 1rem;
  height: 1rem;
  margin: 0;
  flex-shrink: 0;
  accent-color: var(--color-secondary);
}

.group-filter__clear {
  margin-top: var(--space-3);
  padding: 0;
  background: none;
  border: 0;
  font: inherit;
  font-size: var(--text-sm);
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}

/* Narrower screens: filter moves above the schedule as a row of chips */
@media (max-width: 64rem) {
  .schedule-layout {
    grid-template-columns: 1fr;
  }

  .schedule-layout .schedule-toolbar,
  .schedule-layout .schedule,
  .group-filter {
    grid-column: 1;
    grid-row: auto;
  }

  .group-filter {
    order: -1;
    margin-bottom: var(--space-4);
  }

  .group-filter__options {
    display: flex;
    flex-wrap: wrap;
  }

  .group-filter__option {
    border-radius: 999px;
  }
}

/* Week number (left) + week navigation (right) above the grid */
.schedule-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.schedule-toolbar__title {
  font-size: var(--text-xl);
}

.schedule-toolbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Current week number between the arrows (a label, not a button) */
.schedule-toolbar__week {
  min-width: 6.5rem;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
}

.icon-btn:hover {
  border-color: var(--color-secondary);
  transform: translateY(-1px);
}

.icon-btn svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.schedule {
  --hour-height: 4.5rem;
  --day-header: 3.25rem;
  --grid-line: rgb(0 0 0 / 0.08);

  display: grid;
  grid-template-columns: 3.5rem repeat(7, 1fr);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Time labels down the left side */
.schedule__times {
  position: relative;
  margin-top: var(--day-header);
  height: calc(var(--hours) * var(--hour-height));
}

.schedule__time {
  position: absolute;
  top: calc(var(--at) * var(--hour-height));
  right: var(--space-2);
  transform: translateY(-50%);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.schedule__time:first-child {
  transform: none;
}

/* One column per day */
.schedule__day {
  border-left: 1px solid var(--color-border);
  min-width: 0;
}

.schedule__day-name {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: var(--day-header);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.3;
  border-bottom: 1px solid var(--color-border);
}

.schedule__date {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.schedule__day.is-today .schedule__date {
  color: inherit;
  opacity: 0.8;
}

.schedule__empty-week {
  display: none;
}

.schedule__day.is-today .schedule__day-name {
  background: var(--color-secondary);
  color: var(--color-on-secondary);
}

.schedule__day:last-child .schedule__day-name {
  border-top-right-radius: var(--radius);
}

.schedule__slots {
  position: relative;
  height: calc(var(--hours) * var(--hour-height));
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent calc(var(--hour-height) - 1px),
    var(--grid-line) calc(var(--hour-height) - 1px),
    var(--grid-line) var(--hour-height)
  );
}

.schedule__none {
  display: none;
}

/* A course slot */
.slot {
  position: absolute;
  top: calc(var(--start) * var(--hour-height));
  height: calc(var(--length) * var(--hour-height));
  left: 4px;
  right: 4px;
  padding-block: 2px;
}

.slot__button {
  display: flex;
  flex-direction: column;
  gap: 1px;
  width: 100%;
  height: 100%;
  padding: var(--space-2);
  overflow: hidden;
  text-align: left;
  font: inherit;
  font-size: 0.8125rem;
  line-height: 1.3;
  /* --slot-bg / --slot-fg are set per course by js/schedule.js */
  color: var(--slot-fg, var(--color-on-secondary));
  background: var(--slot-bg, var(--color-secondary));
  border: 0;
  border-left: 4px solid rgb(0 0 0 / 0.25);
  border-radius: calc(var(--radius) / 2);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.slot:hover .slot__button,
.slot__button:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.slot__time {
  font-size: 0.75rem;
  opacity: 0.8;
}

.slot__title {
  font-weight: 600;
}

.slot__group {
  opacity: 0.8;
}

/* Cancelled on this date: red cross over the slot */
.slot--cancelled .slot__button {
  position: relative;
  border-left-color: var(--color-danger);
}

.slot--cancelled .slot__button::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to top right, transparent calc(50% - 1.5px), var(--color-danger) calc(50% - 1.5px), var(--color-danger) calc(50% + 1.5px), transparent calc(50% + 1.5px)),
    linear-gradient(to bottom right, transparent calc(50% - 1.5px), var(--color-danger) calc(50% - 1.5px), var(--color-danger) calc(50% + 1.5px), transparent calc(50% + 1.5px));
}

.slot--cancelled .slot__time,
.slot--cancelled .slot__title,
.slot--cancelled .slot__group {
  text-decoration: line-through;
  opacity: 0.6;
}

/* Room at the top of the slot for the marker */
.slot--cancelled .slot__button {
  padding-top: calc(var(--space-2) + 1.125rem);
}

/* "Inställt" marker: centred at the top, drawn above the red cross */
.slot__cancelled {
  position: absolute;
  top: var(--space-1);
  left: 50%;
  z-index: 1;
  transform: translateX(-50%);
  padding: 0 var(--space-1);
  white-space: nowrap;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--color-danger);
  border-radius: 2px;
}

.slot__cancelled-note {
  display: grid;
  gap: 2px;
  margin-bottom: var(--space-3);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-danger);
  background: rgb(220 38 38 / 0.08);
  border-left: 3px solid var(--color-danger);
  border-radius: 2px;
}

.slot__cancelled-note span {
  color: var(--color-text);
}

/* specific_info for this date (shown instead of the description) */
.slot__details .slot__day-info {
  color: var(--color-text);
  font-weight: 600;
}

/* Details popup — shown on hover, keyboard focus or tap.
   Sits outside the slot, to the right, lined up with the slot's top. */
.slot__details {
  --popup-gap: var(--space-2);

  position: absolute;
  top: 0;
  left: calc(100% + var(--popup-gap));
  z-index: 10;
  width: 17rem;
  padding: var(--space-4);
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.18);
  visibility: hidden;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s, transform 0.15s, visibility 0.15s;
}

/* Invisible bridge over the gap, so the popup stays open while the mouse
   moves from the slot onto it */
.slot__details::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: 100%;
  width: calc(var(--popup-gap) + 2px);
}

/* Late courses: line the popup up with the slot's bottom instead, so it
   grows upwards and stays inside the schedule */
.slot--up .slot__details {
  top: auto;
  bottom: 0;
}

/* Last columns: open to the left of the slot instead of the right */
.schedule__day.is-end-of-week .slot__details {
  left: auto;
  right: calc(100% + var(--popup-gap));
  transform: translateX(4px);
}

.schedule__day.is-end-of-week .slot__details::before {
  right: auto;
  left: 100%;
}

.slot:hover .slot__details,
.slot:focus-within .slot__details {
  visibility: visible;
  opacity: 1;
  transform: none;
}

.slot__details h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.slot__details dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
}

.slot__details dt {
  font-weight: 600;
}

.slot__details p {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

@media (prefers-reduced-motion: reduce) {
  .slot__button,
  .slot__details {
    transition: none;
  }
}

/* Phones: a simple list per day, details always visible, empty days hidden */
@media (max-width: 48rem) {
  .schedule {
    display: block;
    background: none;
    border: 0;
    box-shadow: none;
  }

  .schedule__times,
  .schedule__day.is-empty {
    display: none;
  }

  .schedule__day {
    border: 0;
    margin-bottom: var(--space-4);
  }

  .schedule.is-empty-week .schedule__empty-week {
    display: block;
    color: var(--color-text-muted);
  }

  .schedule__day-name {
    flex-direction: row;
    align-items: baseline;
    justify-content: flex-start;
    gap: var(--space-2);
    height: auto;
    padding-bottom: var(--space-2);
    margin-bottom: var(--space-2);
    font-size: var(--text-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .schedule__day.is-today .schedule__day-name {
    background: none;
    color: inherit;
  }

  .schedule__slots {
    height: auto;
    background: none;
    display: grid;
    gap: var(--space-3);
  }

  .slot {
    position: static;
    height: auto;
    padding: 0;
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
  }

  .slot__button {
    height: auto;
    border-radius: 0;
    cursor: default;
  }

  .slot:hover .slot__button {
    transform: none;
    box-shadow: none;
  }

  .slot__details,
  .slot--up .slot__details,
  .schedule__day.is-end-of-week .slot__details {
    position: static;
    width: auto;
    visibility: visible;
    opacity: 1;
    transform: none;
    border: 0;
    box-shadow: none;
    border-radius: 0;
  }

  .slot__details h3,
  .slot__details::before {
    display: none;
  }
}