.bbf-game{
  --bg:#F3F5F7; --surface:#FFFFFF; --ink:#22313F; --muted:#586A7B; --line:#D3DAE1;
  --slate:#34495E; --navy:#1E2D3D; --yellow:#F1C40F; --soft:#FCF3CF; --coral:#D9603B; --green:#1E8449;
  --display:"Arvo",Rockwell,Georgia,serif;
  --body:"Alice",Georgia,"Times New Roman",serif;
}
.bbf-game *{box-sizing:border-box}
.bbf-game{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:19px;line-height:1.6;margin:0}
.bbf-game .wrap{max-width:820px;margin:0 auto;padding-inline:20px;padding-block:0 72px;display:flex;flex-direction:column;gap:56px}
.bbf-game h1,.bbf-game h2,.bbf-game h3{font-family:var(--display);font-weight:700;line-height:1.2;margin:0;text-wrap:balance;color:inherit}
.bbf-game h1{font-size:clamp(2rem,6vw,3rem)}
.bbf-game h2{font-size:clamp(1.5rem,4.5vw,2rem)}
.bbf-game h3{font-size:1.1rem}
.bbf-game p{margin:0}
.bbf-game b{font-family:var(--display);font-weight:700;font-size:.92em}
.bbf-game a:focus-visible,.bbf-game button:focus-visible,.bbf-game summary:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}
.bbf-game .stack{display:flex;flex-direction:column;gap:16px}
.bbf-game .eyebrow{font-family:var(--display);font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.bbf-game .part{border-top:4px solid var(--slate);padding-top:18px}
.bbf-game .part .eyebrow{display:block;margin-bottom:6px}

/* hero */
.bbf-game .hero{background:var(--slate);color:#fff;margin-inline:-20px;padding:56px 20px 48px}
.bbf-game .hero .in{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:18px}
.bbf-game .hero .eyebrow{color:var(--yellow)}
.bbf-game .hero p{max-width:34em;font-size:1.15rem}
.bbf-game .hero h1 span{box-shadow:inset 0 -.35em 0 rgba(241,196,15,.55)}
.bbf-game .jump{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.bbf-game .jump a{font-family:var(--display);font-size:.9rem;color:var(--ink);background:var(--yellow);text-decoration:none;padding:9px 16px;border-radius:4px}

/* buttons */
.bbf-game .btn{font-family:var(--display);font-weight:700;font-size:1rem;border:0;border-radius:999px;padding:14px 24px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,opacity .15s ease;line-height:1.2}
.bbf-game .btn:hover:not(:disabled){transform:translateY(-2px)}
.bbf-game .btn:disabled{opacity:.45;cursor:not-allowed}
.bbf-game .btn-yellow{background:var(--yellow);color:var(--navy);box-shadow:0 10px 24px -10px rgba(241,196,15,.95)}
.bbf-game .btn-navy{background:var(--navy);color:#fff}
.bbf-game .btn-ghost{background:transparent;color:var(--navy);border:2px solid var(--navy);padding:12px 20px}

/* board */
.bbf-game .board{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:20px;box-shadow:0 20px 50px -30px rgba(30,45,61,.35)}
.bbf-game .topic{min-height:230px;border-radius:14px;background:var(--navy);color:#fff;padding:24px;display:flex;flex-direction:column;gap:14px;justify-content:center}
.bbf-game .topic-empty{text-align:center;color:#C9D3DD}
.bbf-game .topic-empty .dice{display:block;font-size:56px;line-height:1.1;margin-bottom:8px}
.bbf-game .topic .meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.bbf-game .topic .cat{font-family:var(--display);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;background:rgba(255,255,255,.12);color:var(--yellow);padding:4px 10px;border-radius:999px}
.bbf-game .topic .num{font-size:.85rem;color:#B9C4CF}
.bbf-game .topic .q{font-family:var(--display);font-size:clamp(1.35rem,4.2vw,1.9rem);line-height:1.25;display:flex;gap:12px;align-items:flex-start}
.bbf-game .topic .q .em{font-size:1.4em;line-height:1}
.bbf-game .topic .sub{color:#DDE3E9;font-size:1rem}
.bbf-game .topic.pop{animation:bbfpop .35s ease}
@keyframes bbfpop{0%{transform:scale(.97);opacity:.4}100%{transform:scale(1);opacity:1}}
.bbf-game .words-h{font-family:var(--display);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:#B9C4CF;margin-top:4px}
.bbf-game .words{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.bbf-game .word{background:rgba(255,255,255,.08);border:2px solid rgba(255,255,255,.18);border-radius:12px;padding:10px 12px;text-align:left;color:#fff;cursor:pointer;font-family:var(--body);font-size:.95rem;line-height:1.35;transition:background .15s ease,border-color .15s ease}
.bbf-game .word .w{display:block;font-family:var(--display);font-weight:700;font-size:1.02rem;color:var(--yellow)}
.bbf-game .word .m{display:block;color:#C9D3DD;font-size:.85rem;margin-top:2px}
.bbf-game .word .tick{float:right;font-size:.9rem;opacity:.5}
.bbf-game .word[aria-pressed="true"]{background:var(--yellow);border-color:var(--yellow)}
.bbf-game .word[aria-pressed="true"] .w,.bbf-game .word[aria-pressed="true"] .m{color:var(--navy)}
.bbf-game .word[aria-pressed="true"] .tick{opacity:1}
.bbf-game .tapnote{font-size:.85rem;color:#B9C4CF}
@media (max-width:620px){.bbf-game .words{grid-template-columns:minmax(0,1fr)}}

.bbf-game .controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
.bbf-game .seen{font-size:.95rem;color:var(--muted)}

/* timer */
.bbf-game .timer-box{display:flex;flex-wrap:wrap;gap:22px;align-items:center;border-top:1px dashed var(--line);padding-top:20px}
.bbf-game .ring{--p:0;--c:var(--yellow);width:170px;height:170px;border-radius:50%;flex:none;background:conic-gradient(var(--c) calc(var(--p)*1turn),#E4E8EC 0);display:grid;place-items:center;transition:background .2s linear}
.bbf-game .ring.warn{--c:var(--coral)}
.bbf-game .ring.done{--c:var(--green)}
.bbf-game .ring-in{width:136px;height:136px;border-radius:50%;background:var(--surface);display:flex;flex-direction:column;align-items:center;justify-content:center}
.bbf-game .time{font-family:var(--display);font-weight:700;font-size:2.4rem;line-height:1;color:var(--navy);font-variant-numeric:tabular-nums}
.bbf-game .state{font-size:.85rem;color:var(--muted);margin-top:6px}
.bbf-game .timer-side{flex:1 1 260px;min-width:0;display:flex;flex-direction:column;gap:12px}
.bbf-game .timer-btns{display:flex;flex-wrap:wrap;gap:10px}
.bbf-game .hint{font-size:1rem;color:var(--muted)}
.bbf-game .hint.win{color:var(--green);font-family:var(--display);font-weight:700}
.bbf-game .streak{font-size:.95rem;background:var(--soft);border-radius:8px;padding:8px 12px;color:var(--ink)}
@media (max-width:520px){.bbf-game .timer-box{justify-content:center}.bbf-game .timer-btns .btn{flex:1 1 auto}}

/* roadmap (same as the Anki guide) */
.bbf-game .road{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);counter-reset:r}
.bbf-game .road li{counter-increment:r;position:relative;text-align:center;padding-top:50px;font-family:var(--display);font-size:.88rem;line-height:1.3}
.bbf-game .road li::before{content:counter(r);position:absolute;top:0;left:50%;transform:translateX(-50%);width:38px;height:38px;border-radius:50%;background:var(--yellow);color:var(--ink);display:grid;place-items:center;font-size:1rem;z-index:1}
.bbf-game .road li::after{content:"";position:absolute;top:18px;left:50%;width:100%;height:3px;background:var(--line)}
.bbf-game .road li:last-child::after{display:none}
.bbf-game .road small{display:block;font-family:var(--body);font-size:.85rem;color:var(--muted);margin-top:2px}
@media (max-width:620px){.bbf-game .road{grid-template-columns:1fr;gap:14px}
.bbf-game .road li{text-align:left;padding:6px 0 6px 54px;font-size:1rem}
.bbf-game .road li::before{left:0;transform:none}
.bbf-game .road li::after{top:38px;left:18px;width:3px;height:100%}}
.bbf-game .btw{background:var(--soft);border-left:5px solid var(--yellow);padding:14px 18px;font-size:1rem;line-height:1.5}
.bbf-game .btw b{display:block;margin-bottom:2px}

/* tips */
.bbf-game .tips{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.bbf-game .tip{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 18px;display:flex;flex-direction:column;gap:6px;font-size:1rem;line-height:1.5}
.bbf-game .tip .ic{font-size:1.6rem;line-height:1}
@media (max-width:560px){.bbf-game .tips{grid-template-columns:minmax(0,1fr)}}

/* full list */
.bbf-game details.all{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:0}
.bbf-game details.all summary{cursor:pointer;font-family:var(--display);font-weight:700;padding:16px 18px;list-style:none}
.bbf-game details.all summary::-webkit-details-marker{display:none}
.bbf-game details.all summary::after{content:" ▾"}
.bbf-game details.all[open] summary::after{content:" ▴"}
.bbf-game .list{margin:0;padding:0 18px 12px;list-style:none;display:flex;flex-direction:column}
.bbf-game .list li{display:flex;gap:12px;align-items:center;justify-content:space-between;padding:10px 0;border-top:1px solid var(--line);font-size:1rem;line-height:1.4}
.bbf-game .list .lt{min-width:0}
.bbf-game .list .lw{display:block;font-size:.85rem;color:var(--muted)}
.bbf-game .list button{flex:none;font-family:var(--display);font-size:.8rem;font-weight:700;background:var(--soft);color:var(--navy);border:0;border-radius:999px;padding:7px 12px;cursor:pointer}
.bbf-game footer{font-size:.9rem;color:var(--muted);text-align:center}
@media (prefers-reduced-motion:reduce){.bbf-game .topic.pop{animation:none}.bbf-game .btn{transition:none}}