/* Shared light theme for the timetable pages. Deliberately light-only:
   the grid colours are subject-assigned and were picked for a white ground. */
:root{
  color-scheme: light;
  --bg:#f7f8fa; --panel:#fff; --ink:#1a1d21; --muted:#6b7280; --line:#e4e7eb;
  --accent:#2563eb; --bad:#dc2626; --bad-bg:#fef2f2; --ok:#047857;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
     font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
a{color:var(--accent)}

header{padding:12px 16px;background:var(--panel);border-bottom:1px solid var(--line);
       position:sticky;top:0;z-index:20}
.bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
h1{font-size:16px;margin:0;font-weight:650}
h1 small{font-weight:400;color:var(--muted);font-size:13px;margin-left:6px}
.grow{flex:1}

input[type=search],select{padding:7px 10px;border:1px solid var(--line);border-radius:7px;
      background:#fff;color:var(--ink);font:inherit}
button,.btn{padding:7px 11px;border:1px solid var(--line);border-radius:7px;background:#fff;
      color:var(--ink);font:inherit;cursor:pointer;text-decoration:none;display:inline-block}
button:hover,.btn:hover{border-color:var(--accent)}
button.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.seg{display:flex;border:1px solid var(--line);border-radius:7px;overflow:hidden}
.seg button{border:0;border-radius:0;padding:7px 13px}
.seg button[aria-pressed=true]{background:var(--accent);color:#fff}
.chip{padding:4px 10px;border:1px solid var(--line);border-radius:99px;cursor:pointer;
      font-size:12.5px;background:#fff}
.tag{font-size:11.5px;padding:2px 8px;border-radius:99px;background:var(--bg);
     border:1px solid var(--line);color:var(--muted)}
.badges{display:flex;gap:6px;flex-wrap:wrap;margin-top:7px}

main{padding:16px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px}
.panel h2{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);
          margin:0 0 10px}
.empty{color:var(--muted);font-style:italic}

/* ---- collapsibles ----
   Built on <details>, so open/close, keyboard and find-in-page come from the
   browser. The default triangle is replaced by a chevron on the right. */
details.panel{padding:0}
details.panel > summary{list-style:none;cursor:pointer;padding:14px;
      display:flex;align-items:center;gap:8px;border-radius:10px}
details.panel[open] > summary{padding-bottom:10px}
summary::-webkit-details-marker{display:none}
details.panel > summary h2{margin:0;flex:1}
details.panel > summary:hover h2{color:var(--ink)}
.chev{color:var(--muted);font-size:11px;transition:transform .15s ease;flex:0 0 auto}
details[open] > summary .chev{transform:rotate(180deg)}
.panel-body{padding:0 14px 14px}
.sum-note{font-size:11.5px;color:var(--muted);font-weight:400}

/* ---- sticky calendar ----
   The left column is far taller than the week grid, so the grid is pinned in
   the viewport and scrolls internally instead of sliding off the top. */
.cal{position:sticky;top:calc(var(--hdr,60px) + 16px);
     max-height:calc(100vh - var(--hdr,60px) - 32px);
     display:flex;flex-direction:column;overflow:hidden}
.cal > *{flex:0 0 auto}
.cal .grid-wrap{flex:1 1 auto;min-height:0;overflow:auto}
.cal .legend{max-height:30vh;overflow:auto}
@media (max-width:960px){
  .cal{position:static;max-height:none;overflow:visible}
}

/* ---- footer ---- */
.site-foot{margin:22px 16px 24px;padding-top:14px;border-top:1px solid var(--line);
      display:flex;gap:8px 14px;align-items:center;flex-wrap:wrap;
      font-size:12.5px;color:var(--muted)}
.site-foot a{text-decoration:none}
.site-foot a:hover{text-decoration:underline}
.site-foot .gh{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;
      border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--ink)}
.site-foot .gh:hover{border-color:var(--accent);text-decoration:none}
.site-foot .gh svg{width:15px;height:15px;fill:currentColor}

/* Not an error, just "this is not published yet" — amber, so it does not read
   like the red clash warnings. Shared: boot.js renders it on any page. */
.notice{background:#fffbeb;border:1px solid #fcd34d;color:#92400e;border-radius:10px;
        padding:11px 13px;margin-bottom:16px;font-size:12.5px;line-height:1.5}
.notice b{display:block;margin-bottom:2px}
.notice code{background:rgba(146,64,14,.1);padding:1px 4px;border-radius:4px;font-size:11.5px}

/* faculty picker — only rendered once a second faculty has data */
.facsel{padding:6px 8px;border:1px solid var(--line);border-radius:7px;background:#fff;
        color:var(--ink);font:inherit;font-weight:600;cursor:pointer}
.facsel:hover{border-color:var(--accent)}

/* ---- weekly grid ---- */
.grid-wrap{overflow-x:auto}
.grid{position:relative;display:grid;
      grid-template-columns:52px repeat(var(--days),minmax(var(--colw,120px),1fr));min-width:640px}
.gh{font-size:12px;font-weight:600;color:var(--muted);padding:6px 4px;text-align:center;
    border-bottom:1px solid var(--line)}
.hours{position:relative}
.hour{height:var(--hh);font-size:11px;color:var(--muted);text-align:right;
      padding-right:6px;transform:translateY(-6px)}
.col{position:relative;border-left:1px solid var(--line)}
.col .line{position:absolute;left:0;right:0;border-top:1px dotted var(--line)}
.ev{position:absolute;left:2px;right:2px;border-radius:6px;padding:3px 5px;overflow:hidden;
    font-size:11.5px;line-height:1.25;color:#fff;background:var(--c,#64748b);cursor:pointer;
    border:1px solid rgba(0,0,0,.12)}
.ev:hover{filter:brightness(1.08)}
.ev:focus-visible{outline:2px solid #111;outline-offset:1px}
.ev b{display:block;font-weight:650;font-size:12px}
.ev span{opacity:.92}
.ev.clash{outline:2px solid var(--bad);outline-offset:-2px}
.ev.dim{opacity:.18}
/* One-off sessions (a single extra class, usually in the last week of term)
   are hatched so they can't be mistaken for a weekly commitment. */
.ev.oneoff{border-style:dashed;
  background-image:repeating-linear-gradient(45deg,
    rgba(255,255,255,.28) 0 5px, transparent 5px 10px)}
/* A session you have decided to skip: still shown (it is on the official
   timetable) but struck through and ignored by the clash check and totals. */
.ev.skipped{opacity:.45;border-style:dotted}
.ev.skipped b,.ev.skipped span{text-decoration:line-through}
.oneoff-note{margin-top:10px;font-size:12px;color:var(--muted);
  border-top:1px solid var(--line);padding-top:8px}
.oneoff-note b{color:var(--ink);font-weight:600}
.oneoff-note ul{margin:4px 0 0;padding-left:18px}
.legend{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px;font-size:12px;color:var(--muted)}
.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px}

/* ---- tables ---- */
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{text-align:left;padding:6px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
tr.noslot td{color:var(--muted)}
.ty{display:inline-block;padding:1px 7px;border-radius:99px;color:#fff;font-size:11px}

/* ---- colour picker ---- */
.swatches{display:flex;gap:4px;flex-wrap:wrap;align-items:center}
.sw{width:16px;height:16px;border-radius:50%;border:1px solid rgba(0,0,0,.18);cursor:pointer;
    padding:0}
.sw[aria-pressed=true]{box-shadow:0 0 0 2px #fff,0 0 0 3.5px var(--ink)}
.dot{width:12px;height:12px;border-radius:50%;display:inline-block;flex:0 0 auto}

/* ---- details dialog ---- */
dialog#details{border:0;border-radius:12px;padding:0;max-width:420px;width:calc(100% - 32px);
        box-shadow:0 18px 50px rgba(0,0,0,.22);color:var(--ink)}
dialog#details::backdrop{background:rgba(15,18,22,.42)}
#dhead{padding:14px 16px;color:#fff;background:var(--c,#64748b)}
#dhead b{font-size:15px;display:block}
#dhead span{opacity:.92;font-size:12.5px}
#dbody{padding:14px 16px}
#dbody dl{display:grid;grid-template-columns:88px 1fr;gap:6px 12px;margin:0}
#dbody dt{color:var(--muted);font-size:12px}
#dbody dd{margin:0}
#dfoot{display:flex;gap:8px;align-items:center;padding:0 16px 14px;flex-wrap:wrap}

@media print{
  header{position:static}
  .noprint{display:none!important}
  body{background:#fff}
  .panel{border:0;padding:0}
  /* the pinned grid must fall back to normal flow, or printing clips it */
  .cal{position:static;max-height:none;overflow:visible}
  .cal .grid-wrap,.cal .legend{overflow:visible;max-height:none}
}