:root { --ink:#166b42; --head:#0b7944; --muted:#4a7f5b; --brand:#0b7944; --bg:#c7d47c; --card:#f4f7e2; --open:#7cc96b; --full:#e88a8a; --tel:#8cbbe6; --line:#d6dfa6; color-scheme: light; }
* { box-sizing: border-box; }
body { margin:0; font:16px/1.45 system-ui, -apple-system, sans-serif; color:var(--ink); background:var(--bg); }
.top { background:var(--brand); padding:12px 16px; } .top a { color:#fff; font-weight:700; text-decoration:none; }
main { max-width:720px; margin:0 auto; padding:16px; }
h1, h2, h3, h4 { color:var(--head); }
h1 { font-size:1.5rem; } h2 { font-size:1.15rem; margin-top:0; } h3 { font-size:1rem; margin:1.2em 0 .4em; }
.card { background:var(--card); border:1px solid var(--line); border-radius:12px; padding:16px; margin-bottom:16px; }
.narrow { max-width:400px; margin:6vh auto; }
.grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(140px,1fr)); gap:12px; }
.pick { display:block; text-align:center; font-weight:600; color:inherit; text-decoration:none; padding:24px 8px; }
label { display:block; margin:.5em 0; } input, select, button { font:inherit; padding:8px 10px; border-radius:8px; border:1px solid var(--line); background:var(--card); color:var(--ink); }
button { cursor:pointer; } .primary { background:var(--brand); color:#fff; border:0; width:100%; margin-top:16px; padding:12px; }
.ghost { background:transparent; } .link { border:0; background:none; color:var(--muted); text-decoration:underline; }
.muted { color:var(--muted); } .small { font-size:.85rem; } .err { color:#c0392b; }
.check { display:flex; gap:8px; align-items:center; }
.pref { margin:6px 0; display:flex; flex-wrap:wrap; gap:6px; align-items:center; } .pref .ctl button { padding:6px 9px; }
.preview { display:grid; grid-template-columns:repeat(auto-fit,minmax(200px,1fr)); gap:12px; margin:12px 0; }
.course h4 { margin:0; } .slots { display:flex; flex-wrap:wrap; gap:4px; margin-top:6px; }
.slot { font-size:.78rem; font-weight:600; padding:4px 5px; border-radius:5px; color:#111; position:relative; }
.slot.open { background:var(--open); } .slot.full { background:var(--full); opacity:.55; } .slot.tel { background:var(--tel); }
.slot[data-spots]::after { content:attr(data-spots); position:absolute; top:-5px; right:-4px; font-size:.6rem; background:var(--brand); color:#fff; border-radius:6px; padding:0 3px; }
.req { border-top:1px solid var(--line); padding:10px 0; } .badge { font-size:.75rem; padding:2px 8px; border-radius:10px; background:var(--line); margin-left:6px; }
.req.booked .badge { background:var(--open); } .req.expired .badge, .req.error .badge { background:var(--full); } .req.watching .badge { background:var(--tel); }
.inline { display:inline; } .row { display:flex; gap:8px; align-items:center; padding:4px 0; }
.stack { display:grid; gap:8px; margin-top:10px; } .topic { display:block; padding:10px; background:var(--bg); border-radius:8px; word-break:break-all; }
.grab { display:block; text-align:center; text-decoration:none; border-radius:8px; margin-top:10px; }
.hero { display:block; width:100%; height:auto; border-radius:8px; margin-bottom:8px; }