:root {
  --bg: #f7f8fa; --fg: #1b1f27; --muted: #5b6573; --card: #ffffff; --line: #d6dbe3;
  --link: #0b5bd3; --sug-bg: #fff8e1; --sug-fg: #6b4b00; --collide: #b3261e;
  --k-deadline: #b3261e; --k-exam: #7a34c8; --k-resit: #b25e00;
  --k-session: #0b5bd3; --k-milestone: #0a7d6c; --k-holiday: #4d7a1e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218; --fg: #e6e9ef; --muted: #9aa4b2; --card: #181c24; --line: #2c3340;
    --link: #7fb0ff; --sug-bg: #2b2410; --sug-fg: #f1d58a; --collide: #ff8a80;
    --k-deadline: #ff8a80; --k-exam: #c8a2ff; --k-resit: #ffb454;
    --k-session: #7fb0ff; --k-milestone: #4fd1bd; --k-holiday: #a5d86b;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--link); }
code { font-size: .85em; word-break: break-word; background: rgba(127,127,127,.15); padding: 0 .25em; border-radius: 3px; }
pre { overflow-x: auto; background: var(--card); border: 1px solid var(--line); padding: .6rem; border-radius: 6px; }
pre code { background: none; padding: 0; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 .9rem; }
.top { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top h1 { font-size: 1.05rem; margin: .5rem 0 .2rem; }
.top h1 a { text-decoration: none; color: var(--fg); }
.top .sub { font-weight: 400; color: var(--muted); font-size: .8rem; }
nav { display: flex; gap: .9rem; overflow-x: auto; white-space: nowrap; padding: .2rem 0 .5rem; }
nav a { text-decoration: none; padding: .15rem 0; border-bottom: 2px solid transparent; font-size: .95rem; }
nav a[aria-current] { border-bottom-color: var(--link); font-weight: 600; }
nav a.ics { margin-left: auto; }
h2 { font-size: 1.3rem; margin: 1.4rem 0 .5rem; }
h3 { font-size: 1.05rem; margin: 1rem 0 .3rem; }
h4 { margin: .6rem 0 .2rem; }
footer { color: var(--muted); font-size: .85rem; padding-bottom: 2rem; }

.badge, .tag {
  display: inline-block; font-size: .72rem; line-height: 1.5; padding: 0 .45rem;
  border-radius: 999px; border: 1px solid var(--line); color: var(--muted); white-space: nowrap;
}
.badge { border-color: currentColor; font-weight: 600; }
.tag.sug { background: var(--sug-bg); color: var(--sug-fg); border: 1px dashed var(--sug-fg); font-style: italic; }
.tag.collide { color: var(--collide); border-color: var(--collide); font-weight: 600; margin-left: .4rem; }
.k-deadline { --k: var(--k-deadline); } .k-exam { --k: var(--k-exam); } .k-resit { --k: var(--k-resit); }
.k-session { --k: var(--k-session); } .k-milestone { --k: var(--k-milestone); } .k-holiday { --k: var(--k-holiday); }
.badge.k-deadline, .badge.k-exam, .badge.k-resit, .badge.k-session, .badge.k-milestone, .badge.k-holiday { color: var(--k); }

/* cards: next 3 */
.cards { display: grid; gap: .6rem; }
.card { background: var(--card); border: 1px solid var(--line); border-left: 5px solid var(--k, var(--line)); border-radius: 8px; padding: .6rem .8rem; }
.card .t { font-weight: 600; }
.card .cd { font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.card .w { color: var(--muted); font-size: .85rem; }
.next-sug { color: var(--muted); font-size: .9rem; }

/* filters */
.filters { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: .4rem .8rem; margin-top: 1rem; }
.filters summary { font-weight: 600; cursor: pointer; padding: .3rem 0; }
fieldset { border: 0; padding: 0; margin: .3rem 0; }
legend { font-size: .8rem; color: var(--muted); padding: 0; }
.chip { display: inline-flex; align-items: center; gap: .3rem; margin: .15rem .5rem .15rem 0; min-height: 2rem; }
.chip input { width: 1.1rem; height: 1.1rem; }
.legend { font-size: .85rem; color: var(--muted); margin: .4rem 0; }
.sample { display: inline-block; width: 1.4rem; height: .8rem; vertical-align: middle; border-left: 4px solid var(--k-deadline); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); }
.sample.suggested { border-left-style: dashed; border-top-style: dashed; border-bottom-style: dashed; border-right-style: dashed; background: var(--sug-bg); }

/* timeline */
.week { margin: 1rem 0; scroll-margin-top: 5.5rem; }
.week h3 { display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .5rem; border-bottom: 1px solid var(--line); padding-bottom: .2rem; margin-bottom: .4rem; }
.week .range { font-weight: 400; font-size: .85rem; color: var(--muted); }
.week.collision h3 { border-bottom-color: var(--collide); }
.week .sessions { color: var(--muted); font-size: .85rem; margin: .1rem 0 .4rem; }
.now-badge { display: none; font-size: .72rem; background: var(--link); color: var(--bg); padding: 0 .5rem; border-radius: 999px; }
.week.current .now-badge { display: inline-block; }
.week.current { outline: 2px solid var(--link); outline-offset: 4px; border-radius: 6px; }
.week.past-week { opacity: .65; }
.items { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }
.item { background: var(--card); border: 1px solid var(--line); border-left: 5px solid var(--k); border-radius: 8px; padding: .45rem .7rem; }
.item.suggested {
  border: 1px dashed var(--muted); border-left: 5px dashed var(--k);
  background: repeating-linear-gradient(135deg, var(--sug-bg), var(--sug-bg) 8px, transparent 8px, transparent 16px), var(--card);
}
.item.cont { opacity: .75; }
.item.past { opacity: .55; }
.item .when { font-size: .85rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.item .what { font-weight: 600; }
.item .tags { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: .25rem; }
.item.hidden, .week .none { display: none; }
.week.empty .none { display: block; color: var(--muted); font-size: .85rem; }
.week.empty .items { display: none; }

/* tables: stacked on phones */
.tablewrap { margin: .6rem 0; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; vertical-align: top; padding: .35rem .5rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
@media (max-width: 599px) {
  table, thead, tbody, tr, th, td { display: block; }
  thead { position: absolute; left: -9999px; }
  tr { background: var(--card); border: 1px solid var(--line); border-radius: 8px; margin-bottom: .5rem; padding: .3rem .5rem; }
  td { border: 0; padding: .15rem 0; }
  td::before { content: attr(data-label) ": "; color: var(--muted); font-size: .8rem; }
  td:empty { display: none; }
}

/* deliverables */
.toc { columns: 2; padding-left: 1.1rem; }
.deliv { border-top: 1px solid var(--line); scroll-margin-top: 5.5rem; }
.deliv ul, .oq ul, .sugbox ul { padding-left: 1.2rem; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: .15rem .8rem; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: .5rem .8rem; margin: .4rem 0; }
.facts dt { color: var(--muted); font-size: .85rem; }
.facts dd { margin: 0; }
li.suggested, .note.suggested { background: var(--sug-bg); border-left: 3px dashed var(--sug-fg); padding-left: .4rem; margin: .2rem 0; list-style-position: inside; }
.sugbox { border: 1px dashed var(--muted); border-radius: 8px; padding: 0 .8rem .6rem; margin: 1.2rem 0; background: linear-gradient(var(--sug-bg), var(--sug-bg)) , var(--card); background-blend-mode: normal; }
.sugbox h2 { margin-top: .8rem; }

/* load view */
.loadgrid { display: grid; gap: .6rem; }
.loadweek { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: .5rem .8rem; }
.loadweek.collision { border: 2px solid var(--collide); }
.loadweek h3 { margin: 0 0 .3rem; display: flex; flex-wrap: wrap; align-items: center; gap: .3rem .5rem; }
.loadweek .bar { display: inline-block; height: .7rem; width: calc(var(--n) * 1.1rem + .2rem); max-width: 8rem; background: var(--link); border-radius: 3px; }
.loadweek .count { font-weight: 400; font-size: .8rem; color: var(--muted); }
.loadweek .note { margin: .4rem 0 0; }
.oq h3 { margin-top: 1.4rem; }
@media (max-width: 420px) { .toc { columns: 1; } .facts { grid-template-columns: 1fr; } }
.loadweek h4 { margin: .5rem 0 .15rem; font-size: .85rem; color: var(--muted); font-weight: 600; }
.loadweek .sessions { margin: .1rem 0; font-size: .85rem; color: var(--muted); }
.wl { margin: 0; padding: 0; list-style: none; }
.wl li { padding: .2rem 0 .2rem .5rem; border-left: 3px solid var(--line); margin: .15rem 0; }
.wl .when { display: block; font-size: .8rem; color: var(--muted); }
.wl.sugl li { background: var(--sug-bg); border-left: 3px dashed var(--sug-fg); }
.wl-none { margin: 0; color: var(--muted); font-size: .9rem; }