:root{--navy:#08004C;--pink:#FB2C7E;--gold:#FAAE10;--ink:#1d1b33;--muted:#5b587a;--bg:#fbfaf6;--card:#fff;--line:#e6e3ee;--ok:#0e7c6b;--bad:#c62b5b}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--ink:#ecebf5;--muted:#b3b0cc;--bg:#0d0b24;--card:#17143a;--line:#2c2856}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif}
header{background:var(--navy);color:#fff;padding:12px 16px;display:flex;gap:10px;align-items:baseline}
.brand{color:#fff;font-weight:800;text-decoration:none}header span{color:var(--gold);font-weight:600}
main{max-width:880px;margin:0 auto;padding:20px 16px 40px}h1{margin:.2em 0;color:var(--pink)}h2{margin-top:1.6em}
.lead,.meta{color:var(--muted)}.back{color:var(--muted);text-decoration:none;font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;color:inherit;text-decoration:none;display:flex;flex-direction:column}
.card img,.card .thumb{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--navy)}.card b{padding:10px 12px 0}.card span{padding:2px 12px 12px;color:var(--muted);font-size:14px}
.player{position:relative;aspect-ratio:16/9;margin:0 auto;background:#000;border-radius:12px;overflow:hidden}.player iframe,.player video{position:absolute;inset:0;width:100%;height:100%;border:0}
.placeholder{display:grid;place-items:center;height:100%;color:#fff;background:var(--navy)}
.transcript{margin:14px 0;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 14px}
.test{background:var(--card);border:1px solid var(--line);border-left:6px solid var(--gold);border-radius:12px;padding:14px 16px;margin:12px 0}
.tq{font-weight:700;margin-bottom:8px}.tn{display:inline-block;min-width:24px;height:24px;border-radius:12px;background:var(--navy);color:#fff;text-align:center;font-size:13px;line-height:24px;margin-right:6px}
.opts{display:grid;gap:8px}.opt,.check,.rec,.play{font:inherit;padding:10px 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink);cursor:pointer;text-align:left;min-height:44px}
.check,.rec{background:var(--navy);color:#fff;border-color:var(--navy)}.opt.right,.gap.right{border-color:var(--ok);background:#e3f4ef;color:#0b4d43}.opt.wrong,.gap.wrong{border-color:var(--bad);background:#fbe6ee;color:#7a1636}
.gap{font:inherit;min-width:7em;padding:4px 8px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
.why{margin-top:8px;color:var(--muted)}.line{font-size:18px;font-weight:600}.row{display:flex;gap:8px;flex-wrap:wrap}.note{font-size:13px;color:var(--muted)}
.score{font-size:20px;font-weight:800;color:var(--ok)}footer{text-align:center;color:var(--muted);font-size:14px;padding:20px}footer a{color:var(--muted)}
.easenav{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 6px;position:sticky;top:0;z-index:5;background:var(--bg);padding:8px 0}
.pill{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);text-decoration:none;font-weight:700}
.pill small{background:var(--navy);color:#fff;border-radius:999px;padding:0 7px;font-size:12px}.pill.on{background:var(--navy);color:#fff;border-color:var(--navy)}.pill.on small{background:var(--gold);color:var(--navy)}
.pill.alt{border-color:var(--pink)}.ease{scroll-margin-top:70px;margin-top:22px}.ease h2 small{font-size:14px;color:var(--muted);font-weight:600}
.ease-easy h2{color:#0e7c6b}.ease-medium h2{color:#b77a00}.ease-hard h2{color:var(--pink)}.soon{color:var(--muted);font-style:italic}
.crumb{font-size:14px;color:var(--muted)}.crumb a{color:var(--muted)}
.pager{display:flex;justify-content:space-between;gap:12px;margin:26px 0 0;border-top:1px solid var(--line);padding-top:14px}.pager a{color:var(--navy);font-weight:700;text-decoration:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .pager a{color:var(--gold)}}