/* progress-calendar.css — the dashboard's preparation calendar
   (assets/js/progress-calendar.js + assets/js/lib/activity-calendar.js).

   Colour: intensity is ONE hue (blue), light→dark on the light theme and
   flipped to dark→bright on the dark theme, so "more" always reads as "more
   ink" against the surface. Exam dates use a different hue (orange) as a
   ring, never a fill, so a milestone can never be mistaken for a busy day.
   Identity is never colour alone: every cell has an aria-label and a
   tooltip, and the day panel lists everything in text. */

.pc-card {
  --pc-cell: 12px;
  --pc-gap: 3px;
  --pc-l0: #e9edf3;
  --pc-l1: #b7d3f6;
  --pc-l2: #6da7ec;
  --pc-l3: #2a78d6;
  --pc-l4: #184f95;
  --pc-ms: #eb6834;
  --pc-today: #0f172a;
  --pc-future: #d4dae3;

  background: var(--card-bg);
  border: 1px solid var(--divider-light);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  margin-bottom: 14px;
  position: relative;
  min-width: 0;
}
[data-theme="dark"] .pc-card {
  --pc-l0: #1c2433;
  --pc-l1: #184f95;
  --pc-l2: #2a78d6;
  --pc-l3: #5598e7;
  --pc-l4: #9ec5f4;
  --pc-ms: #d95926;
  --pc-today: #f1f5f9;
  --pc-future: #2a3447;
  border-color: var(--card-border);
}

/* ── Header ── */
.pc-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 10px;
}
.pc-kicker { margin-bottom: 4px; }
.pc-summary {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}
.pc-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.pc-seg {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 2px;
  background: var(--bg-tertiary);
}
.pc-seg button {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
}
.pc-seg button.active {
  background: var(--card-bg);
  color: var(--text);
  box-shadow: 0 1px 3px var(--shadow);
}
.pc-select {
  font: inherit;
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  max-width: 100%;
}
.pc-monthnav {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.pc-monthnav[hidden], .pc-select[hidden] { display: none; }
.pc-month-title {
  min-width: 118px;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}
.pc-icon-btn, .pc-text-btn {
  font: inherit;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.pc-icon-btn { width: 30px; height: 30px; font-size: 1.1rem; line-height: 1; }
.pc-text-btn { font-size: 0.78rem; font-weight: 600; padding: 6px 10px; color: var(--primary); }
.pc-icon-btn:hover, .pc-text-btn:hover, .pc-seg button:hover { background: var(--surface-hover); }

.pc-notice {
  margin: 0 0 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--clr-info-bg);
  border: 1px solid var(--clr-info-border);
  color: var(--text);
  font-size: 0.8rem;
  line-height: 1.45;
}
.pc-loading { color: var(--text-secondary); font-size: 0.85rem; margin: 18px 0; }

/* ── Heatmap ── */
.pc-body-wrap { position: relative; }
/* Cells size to the card: 53+ weeks fill a desktop width, and on a phone the
   floor (10px) wins and the grid scrolls sideways inside .pc-scroll instead.
   Browsers without container units drop the declaration and keep 12px. */
.pc-body { container-type: inline-size; }
.pc-heatmap { --pc-cell: clamp(10px, calc((100cqw - 40px) / var(--pc-weeks) - var(--pc-gap)), 18px); }
.pc-scroll {
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}
.pc-heatmap {
  display: grid;
  grid-template-columns: 28px auto;
  grid-template-rows: 16px auto;
  column-gap: 6px;
  width: max-content;
  /* Room for the 2px exam-date ring on the outermost cells, which a scroll
     container would otherwise clip. */
  padding: 2px 4px 2px 0;
}
.pc-hm-months {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(var(--pc-weeks), var(--pc-cell));
  column-gap: var(--pc-gap);
  font-size: 0.68rem;
  color: var(--text-secondary);
}
.pc-hm-months span { white-space: nowrap; }
.pc-hm-days {
  grid-column: 1;
  grid-row: 2;
  display: grid;
  grid-template-rows: repeat(7, var(--pc-cell));
  row-gap: var(--pc-gap);
  font-size: 0.66rem;
  line-height: var(--pc-cell);
  color: var(--text-secondary);
}
.pc-hm-grid {
  grid-column: 2;
  grid-row: 2;
  display: grid;
  grid-template-rows: repeat(7, var(--pc-cell));
  grid-auto-flow: column;
  grid-auto-columns: var(--pc-cell);
  gap: var(--pc-gap);
}
.pc-cell {
  display: block;
  width: var(--pc-cell);
  height: var(--pc-cell);
  padding: 0;
  border: 0;
  border-radius: 3px;
  background: var(--pc-l0);
  cursor: pointer;
  position: relative;
}
.pc-cell[data-level="1"] { background: var(--pc-l1); }
.pc-cell[data-level="2"] { background: var(--pc-l2); }
.pc-cell[data-level="3"] { background: var(--pc-l3); }
.pc-cell[data-level="4"] { background: var(--pc-l4); }
.pc-cell.pc-pad { background: transparent; cursor: default; }
.pc-cell.is-future { background: transparent; box-shadow: inset 0 0 0 1px var(--pc-future); }
.pc-cell.is-today { box-shadow: inset 0 0 0 1.5px var(--pc-today); }
.pc-cell.has-ms { box-shadow: 0 0 0 2px var(--pc-ms); }
.pc-cell.has-ms.has-exam::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--pc-ms);
}
.pc-cell.is-selected { outline: 2px solid var(--primary); outline-offset: 1px; z-index: 1; }
.pc-cell:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; z-index: 2; }
.pc-hm-grid .pc-cell:not(.pc-pad):hover { filter: brightness(1.08); outline: 1px solid var(--text-secondary); outline-offset: 1px; }

.pc-foot:empty { display: none; }
.pc-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 6px 16px;
  margin-top: 8px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}
.pc-legend-scale, .pc-legend-ms { display: inline-flex; align-items: center; gap: 3px; }
.pc-legend-ms { gap: 8px; }
.pc-legend-cell { cursor: default; width: 11px; height: 11px; }

/* ── Tooltip ── */
.pc-tip {
  position: absolute;
  z-index: 5;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
  max-width: 260px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  background: var(--text);
  color: var(--bg-secondary);
  font-size: 0.74rem;
  line-height: 1.35;
  box-shadow: 0 4px 14px var(--shadow);
}
.pc-tip[hidden] { display: none; }
.pc-tip strong { font-size: 0.82rem; }
.pc-tip .pc-tip-ms { font-weight: 600; }

/* ── Month view: a day grows to hold every activity it had ── */
.pc-month-head, .pc-month-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
}
.pc-month-head {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  padding: 0 4px;
}
.pc-mday {
  min-height: 78px;
  min-width: 0;
  border: 1px solid var(--divider-light);
  border-radius: var(--radius-sm);
  padding: 4px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 3px;
}
[data-theme="dark"] .pc-mday { background: var(--bg-secondary); border-color: var(--card-border); }
.pc-mday.is-out { background: transparent; border-color: transparent; }
.pc-mday.is-future { opacity: 0.85; }
.pc-mday.is-today { border-color: var(--primary); }
.pc-mday.is-selected { box-shadow: 0 0 0 2px var(--primary); }
.pc-mday-num {
  align-self: flex-start;
  border: 0;
  background: none;
  padding: 1px 4px;
  border-radius: 4px;
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
}
.pc-mday.is-today .pc-mday-num { background: var(--primary); color: #fff; }
.pc-mday-wd { display: none; }
.pc-mday-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.pc-chip {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  min-width: 0;
  border: 0;
  border-left: 3px solid var(--pc-l3);
  background: var(--primary-surface);
  color: var(--text);
  font: inherit;
  font-size: 0.7rem;
  line-height: 1.25;
  text-align: left;
  padding: 3px 5px;
  border-radius: 4px;
  cursor: pointer;
}
.pc-chip-study, .pc-chip-current_affairs { border-left-color: var(--pc-l1); background: var(--bg-tertiary); }
.pc-chip-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pc-chip-val { flex: none; font-weight: 600; color: var(--text-secondary); }
.pc-chip-icon { flex: none; }
.pc-more {
  border: 0;
  background: none;
  color: var(--primary);
  font: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  text-align: left;
  padding: 2px 4px;
  cursor: pointer;
}
.pc-ms-tag {
  display: inline-block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.66rem;
  font-weight: 700;
  padding: 2px 5px;
  border-radius: 4px;
  color: var(--text);
  border: 1px solid var(--pc-ms);
  background: color-mix(in srgb, var(--pc-ms) 12%, transparent);
}

/* ── Day detail ── */
.pc-detail {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg);
}
[data-theme="dark"] .pc-detail { background: var(--bg-secondary); }
.pc-detail[hidden] { display: none; }
.pc-detail-head { display: flex; align-items: baseline; gap: 10px; }
.pc-detail-date { margin: 0; font-size: 0.95rem; color: var(--text); }
.pc-detail-count { font-size: 0.78rem; color: var(--text-secondary); }
.pc-detail-close {
  margin-left: auto;
  border: 0;
  background: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  cursor: pointer;
  padding: 2px 6px;
}
.pc-detail-group {
  margin: 12px 0 6px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}
.pc-detail-list, .pc-detail-ms { list-style: none; margin: 0; padding: 0; }
.pc-detail-ms { margin-top: 8px; display: flex; flex-direction: column; gap: 4px; font-size: 0.82rem; color: var(--text); }
.pc-detail-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-top: 1px solid var(--divider-light);
}
.pc-detail-item:first-child { border-top: 0; }
.pc-detail-icon { flex: none; font-size: 1rem; }
.pc-detail-text { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.pc-detail-title { font-size: 0.86rem; font-weight: 600; color: var(--text); overflow-wrap: anywhere; }
.pc-detail-meta { font-size: 0.76rem; color: var(--text-secondary); }
.pc-detail-link {
  flex: none;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
}
.pc-detail-empty, .pc-detail-note { margin: 10px 0 0; font-size: 0.82rem; color: var(--text-secondary); }
.pc-detail-note { font-size: 0.74rem; }

/* ── Exam countdown ── */
.pc-exams-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
}
.pc-exams-head .section-label { margin: 0; }
.pc-exams {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 8px;
  margin-top: 8px;
}
.pc-exams-empty { grid-column: 1 / -1; margin: 0; font-size: 0.82rem; color: var(--text-secondary); }
.pc-exam-card {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--divider-light);
  border-left: 3px solid var(--pc-ms);
  background: var(--bg);
  min-width: 0;
}
[data-theme="dark"] .pc-exam-card { background: var(--bg-secondary); border-color: var(--card-border); border-left-color: var(--pc-ms); }
.pc-exam-card.is-quiet { border-left-color: var(--border); }
.pc-exam-card.is-soon { box-shadow: 0 0 0 1px var(--pc-ms); }
.pc-exam-title { margin: 0; font-size: 0.86rem; font-weight: 700; color: var(--text); }
.pc-exam-next { font-size: 0.8rem; color: var(--text); }
.pc-exam-sub, .pc-exam-pace { font-size: 0.74rem; color: var(--text-secondary); margin: 0; }
.pc-exam-date {
  align-self: flex-start;
  border: 0;
  background: none;
  padding: 0;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.pc-manage {
  margin-top: 8px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
}
[data-theme="dark"] .pc-manage { background: var(--bg-secondary); }
.pc-manage[hidden] { display: none; }
.pc-manage-group { border: 0; margin: 0 0 10px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 14px; }
.pc-manage-group legend {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.pc-manage-opt { display: inline-flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--text); }
.pc-manage-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ── Phones: the month becomes an agenda — only days with something in them ── */
@media (max-width: 640px) {
  .pc-card { padding: 14px 12px; }
  .pc-toolbar { width: 100%; }
  .pc-select { flex: 1 1 140px; }
  .pc-month-head { display: none; }
  .pc-month-grid { display: flex; flex-direction: column; gap: 6px; }
  .pc-mday { min-height: 0; flex-direction: row; align-items: flex-start; gap: 8px; }
  .pc-mday.is-out, .pc-mday.is-empty:not(.is-today) { display: none; }
  .pc-mday-num { flex: none; width: 44px; text-align: center; display: flex; flex-direction: column; align-items: center; }
  .pc-mday-wd { display: block; font-size: 0.62rem; font-weight: 500; text-transform: uppercase; }
  .pc-mday-body { flex: 1; }
  .pc-month-grid:not(:has(.pc-mday:not(.is-out):not(.is-empty)))::after {
    content: 'Nothing recorded this month yet.';
    font-size: 0.82rem;
    color: var(--text-secondary);
  }
}

@media (forced-colors: active) {
  .pc-cell[data-level="0"] { forced-color-adjust: none; border: 1px solid CanvasText; }
  .pc-cell.has-ms { outline: 2px dashed Highlight; }
}