:root {
  --bg: var(--tg-theme-bg-color, #0f1115);
  --card: var(--tg-theme-secondary-bg-color, #181b22);
  --fg: var(--tg-theme-text-color, #e8e8ea);
  --muted: var(--tg-theme-hint-color, #8b8f98);
  --accent: var(--tg-theme-button-color, #4c8dff);
  --accent-fg: var(--tg-theme-button-text-color, #fff);
  --danger: #ff5f5f;
  --warn: #ffb547;
  --ok: #3ecf8e;
  --radius: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.4 -apple-system, system-ui, "Segoe UI", Roboto, sans-serif; }
header { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px 4px; }
.brand { font-weight: 700; letter-spacing: .5px; }
#clock { color: var(--muted); font-size: 13px; }
main { padding: 8px 12px 84px; }
nav { position: fixed; bottom: 0; left: 0; right: 0; display: flex; background: var(--card); border-top: 1px solid rgba(255,255,255,.06); padding-bottom: env(safe-area-inset-bottom); }
nav button { flex: 1; background: none; border: 0; color: var(--muted); padding: 10px 2px 8px; font-size: 11px; cursor: pointer; }
nav button.active { color: var(--accent); font-weight: 600; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .8px; color: var(--muted); margin: 16px 4px 6px; }
h2:first-child { margin-top: 4px; }
.card { background: var(--card); border-radius: var(--radius); padding: 10px 12px; margin-bottom: 8px; }
.row { display: flex; align-items: flex-start; gap: 10px; padding: 7px 0; border-bottom: 1px solid rgba(255,255,255,.05); }
.row:last-child { border-bottom: 0; }
.row .main { flex: 1; min-width: 0; }
.row .title { font-weight: 500; overflow-wrap: anywhere; }
.row .sub { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.row .when { color: var(--muted); font-size: 12.5px; white-space: nowrap; min-width: 64px; }
.row.overdue .when, .overdue { color: var(--danger); }
.row.soon .when { color: var(--warn); }
.chip { display: inline-block; font-size: 11px; padding: 1px 7px; border-radius: 999px; background: rgba(255,255,255,.08); color: var(--muted); margin-right: 4px; }
.chip.imp3 { background: rgba(255,95,95,.18); color: var(--danger); }
.chip.imp2 { background: rgba(255,181,71,.16); color: var(--warn); }
.actions { display: flex; gap: 6px; flex-shrink: 0; }
button.act { background: rgba(255,255,255,.08); border: 0; color: var(--fg); border-radius: 8px; padding: 6px 9px; font-size: 12px; cursor: pointer; }
button.act.primary { background: var(--accent); color: var(--accent-fg); }
a.act { text-decoration: none; }
.empty { color: var(--muted); text-align: center; padding: 30px 10px; }
.day { margin-bottom: 10px; }
.day .dh { font-weight: 600; margin: 8px 4px 4px; }
.day .dh.today { color: var(--accent); }
.course { cursor: pointer; }
.course .grade { color: var(--ok); font-weight: 600; }
.back { color: var(--accent); background: none; border: 0; font-size: 14px; padding: 4px 0 8px; cursor: pointer; }
.search { display: flex; gap: 6px; margin-bottom: 8px; }
.search input { flex: 1; background: var(--card); border: 1px solid rgba(255,255,255,.08); color: var(--fg); border-radius: 10px; padding: 10px 12px; font-size: 15px; }
.answer { white-space: pre-wrap; }
.html b { font-weight: 600; } .html i { color: var(--muted); } .html code { font-family: ui-monospace, monospace; font-size: 12px; background: rgba(255,255,255,.08); padding: 0 4px; border-radius: 4px; }
.seg { display: flex; gap: 6px; margin-bottom: 8px; }
.seg button { flex: 1; }
.kv { color: var(--muted); font-size: 12.5px; }
#toast { position: fixed; left: 50%; bottom: 70px; transform: translateX(-50%); background: #222; color: #fff; padding: 8px 14px; border-radius: 10px; font-size: 13px; opacity: 0; transition: opacity .2s; pointer-events: none; }
#toast.show { opacity: 1; }
.src { font-size: 12px; color: var(--muted); }

.tile { background: var(--card); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px; cursor: pointer; }
.tile-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.tile-code { font-weight: 700; font-size: 16px; }
.tile-name { color: var(--muted); font-size: 12.5px; font-weight: 400; }
.tile-meta { color: var(--muted); font-size: 12.5px; margin-top: 6px; }
.big { font-size: 26px; font-weight: 700; color: var(--ok); white-space: nowrap; }
.big.bad { color: var(--danger); }
.bar { height: 8px; border-radius: 999px; background: rgba(255,255,255,.08); overflow: hidden; margin: 8px 0 2px; }
.bar.small { height: 5px; margin: 5px 0 3px; }
.bar .fill { height: 100%; background: var(--accent); border-radius: 999px; }
.letters { display: flex; gap: 6px; margin-top: 10px; }
.letter { flex: 1; text-align: center; background: rgba(255,255,255,.06); border-radius: 10px; padding: 6px 4px; }
.letter .lt { font-weight: 700; font-size: 15px; }
.letter .ln { font-size: 11px; color: var(--muted); }
.letter.ok { background: rgba(62,207,142,.18); } .letter.ok .ln { color: var(--ok); }
.letter.bad { opacity: .45; }

details.box { background: var(--card); border-radius: var(--radius); margin-bottom: 8px; }
details.box > summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; padding: 11px 14px; font-weight: 600; }
details.box > summary::-webkit-details-marker { display: none; }
details.box > summary::after { content: "›"; color: var(--muted); transform: rotate(90deg); margin-left: 8px; transition: transform .15s; }
details.box[open] > summary::after { transform: rotate(-90deg); }
details.box > summary .chip { margin-left: auto; margin-right: 10px; }
.box-body { padding: 0 12px 10px; }
details.item { border-bottom: 1px solid rgba(255,255,255,.05); }
details.item:last-child { border-bottom: 0; }
details.item > summary { list-style: none; cursor: pointer; display: flex; gap: 10px; align-items: center; padding: 8px 0; }
details.item > summary::-webkit-details-marker { display: none; }
details.item > summary .title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item-body { padding: 0 0 8px 74px; }
#modal { position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 50; overflow-y: auto; padding: 12px; }
.modal-card { background: var(--bg); border-radius: 14px; padding: 12px; max-width: 720px; margin: 0 auto 40px; }
.modal-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.ctx { width: 100%; min-height: 200px; margin-top: 8px; background: rgba(255,255,255,.05); color: var(--fg); border: 1px solid rgba(255,255,255,.08); border-radius: 8px; padding: 8px; font: 12px ui-monospace, monospace; }
a { color: var(--accent); text-decoration: none; }