:root {
  --bg: #f6f5f1; --panel: #ffffff; --fg: #1d1d1b; --muted: #66665f; --line: #e3e2dc;
  --accent: #00594c; --accent-fg: #ffffff; --accent-soft: #e3f0ec; --chip: #eeefea;
  --ok: #dff1e4; --ok-fg: #1d6b37; --warn: #fff1cc; --warn-fg: #7a5600;
  --bad: #fbe2df; --bad-fg: #9b2b20; --none: #e9edf4; --none-fg: #4a5670;
  --aa: #e8e4f6; --aa-fg: #4b3a8f;
  --shadow: 0 8px 24px rgba(0, 0, 0, .12);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141513; --panel: #1c1d1b; --fg: #e8e8e3; --muted: #9a9a94; --line: #2f302c;
    --accent: #5fc9b3; --accent-fg: #0d1f1b; --accent-soft: #1d302b; --chip: #262824;
    --ok: #1c3324; --ok-fg: #8fdca6; --warn: #3a3018; --warn-fg: #f0cd73;
    --bad: #3d201d; --bad-fg: #f4a299; --none: #22283a; --none-fg: #a9b6d6;
    --aa: #2a2540; --aa-fg: #c4b8f2;
    --shadow: 0 8px 24px rgba(0, 0, 0, .5);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
button, input, select { font: inherit; color: inherit; }
input[type=search], input[type=text], select {
  width: 100%; padding: 8px 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
}
input:focus-visible, select:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { border: 0; border-radius: 8px; padding: 8px 12px; cursor: pointer; background: var(--chip); }
button.ghost { background: transparent; color: var(--accent); padding: 6px 8px; }
button.danger { color: var(--bad-fg); }
button:disabled { opacity: .5; cursor: default; }

.top { display: flex; align-items: center; gap: 12px; padding: 12px 20px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.brand { flex: 1; min-width: 0; }
.top h1 { font-size: 17px; margin: 0; }
.sub { color: var(--muted); font-size: 12px; }
.lang { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang button { border-radius: 0; background: transparent; padding: 5px 10px; font-weight: 600; color: var(--muted); }
.lang button.on { background: var(--accent); color: var(--accent-fg); }

.layout { display: grid; grid-template-columns: minmax(300px, 380px) 1fr; gap: 16px; padding: 16px 20px; align-items: start; max-width: 1400px; margin: 0 auto; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 16px; min-width: 0; }
.mine { position: sticky; top: 72px; max-height: calc(100vh - 88px); overflow-y: auto; }
h2 { font-size: 15px; margin: 0 0 4px; }
.hint { color: var(--muted); font-size: 12.5px; margin: 4px 0; }

/* ---- add course search */
.search-wrap { position: relative; margin-top: 10px; }
.suggest { margin-top: 4px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); max-height: 340px; overflow-y: auto; display: none; }
.suggest.open { display: block; }
.sg { padding: 8px 10px; cursor: pointer; border-bottom: 1px solid var(--line); }
.sg:last-child { border-bottom: 0; }
.sg.active, .sg:hover { background: var(--accent-soft); }
.sg .c { font-size: 12px; color: var(--muted); }
.sg.empty-sg { cursor: default; color: var(--muted); }

/* ---- my courses */
.my-list { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.my { border: 1px solid var(--line); border-radius: 10px; padding: 10px; background: var(--bg); }
.my-head { display: flex; gap: 8px; align-items: flex-start; }
.my-head .t { flex: 1; min-width: 0; font-weight: 600; }
.my-head .t small { display: block; font-weight: 400; color: var(--muted); font-size: 12px; }
.my-head button { padding: 2px 8px; font-size: 16px; line-height: 1; background: transparent; color: var(--muted); }
.my select { margin-top: 6px; padding: 5px 8px; font-size: 13px; }
.my .meta { margin-top: 4px; }
.my.ended { opacity: .6; }
.mine-actions { display: flex; justify-content: space-between; margin-top: 10px; }
.empty-mine { border: 1px dashed var(--line); border-radius: 10px; padding: 16px; text-align: center; color: var(--muted); font-size: 13px; }

/* ---- find */
.fields-box { margin: 10px 0 12px; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.fields-box > summary { cursor: pointer; }
.fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 2px 14px; margin-top: 8px; }
.fields label, .groups label { display: flex; gap: 8px; align-items: flex-start; padding: 3px 0; cursor: pointer; }
.fields input, .groups input { margin-top: 3px; }
.groups { margin-top: 8px; }
.groups summary { cursor: pointer; color: var(--accent); }
.listing { font-weight: 600; font-size: 12px; color: var(--muted); margin: 10px 0 2px; }
.tag { display: inline-block; font-size: 11px; padding: 0 6px; border-radius: 9px; background: var(--chip); color: var(--muted); margin-left: 4px; }

.filters { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; }
.filters .grow { flex: 1 1 240px; }
.filters .f { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.filters .f select { width: auto; }
.filters input[type=range] { width: 110px; }
.checks { display: flex; flex-wrap: wrap; gap: 4px 16px; width: 100%; }
.checks label { cursor: pointer; }

.summary { color: var(--muted); font-size: 13px; margin: 14px 2px 10px; display: flex; gap: 14px; flex-wrap: wrap; }
.notice { background: var(--warn); color: var(--warn-fg); border-radius: 8px; padding: 9px 12px; font-size: 13px; margin-bottom: 10px; }

.card { border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; display: grid; grid-template-columns: 92px minmax(0, 1fr) auto; gap: 14px; padding: 12px 14px; align-items: start; }
.card > div, .my, .sg { overflow-wrap: anywhere; }
.ov { border-radius: 8px; padding: 8px 6px; text-align: center; font-weight: 700; font-size: 18px; line-height: 1.1; }
.ov small { display: block; font-size: 11px; font-weight: 500; margin-top: 3px; }
.ov.ok { background: var(--ok); color: var(--ok-fg); } .ov.warn { background: var(--warn); color: var(--warn-fg); }
.ov.bad { background: var(--bad); color: var(--bad-fg); } .ov.none { background: var(--none); color: var(--none-fg); font-size: 13px; }
.title { font-weight: 600; font-size: 15px; }
.meta { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.badge { display: inline-block; font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 9px; vertical-align: 1px; margin-left: 4px; }
.badge.aa { background: var(--aa); color: var(--aa-fg); }
.right { text-align: right; font-size: 12.5px; white-space: nowrap; }
.enrol-open { color: var(--ok-fg); font-weight: 600; } .enrol-soon { color: var(--warn-fg); font-weight: 600; }
.card details { margin-top: 6px; font-size: 12.5px; }
.card details summary { cursor: pointer; color: var(--accent); }
.card ul { margin: 6px 0; padding-left: 18px; }
.info { font-style: italic; }
.add-btn { margin-top: 8px; font-size: 12.5px; padding: 4px 10px; background: var(--accent-soft); color: var(--accent); }
.empty { text-align: center; color: var(--muted); padding: 50px 20px; }
.more-wrap { text-align: center; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 10px 20px 30px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 12px 16px; }
  .mine { position: static; max-height: none; }
  .top { padding: 10px 16px; }
}
@media (max-width: 560px) {
  .card { grid-template-columns: 72px minmax(0, 1fr); }
  .right { grid-column: 1 / -1; text-align: left; white-space: normal; display: flex; gap: 12px; flex-wrap: wrap; }
  .filters .f { white-space: normal; flex-wrap: wrap; }
}