/* Biz Quest — app của đội (iPad xoay ngang là chính, điện thoại vẫn dùng được) */
:root{
  --red:#C5281C; --red-d:#8E1712; --gold:#C5281C; --cream:#F6EFEE; --ink:#2B2523; --muted:#7a6f6b; --line:#e6dad7;
  --ok:#2B2523; --bad:#c0392b; --card:#fff;
  --font-title:Cambria,"Lora",Georgia,"Times New Roman",serif;
  --font-body:"Be Vietnam Pro",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{margin:0;background:var(--cream);color:var(--ink);font:17px/1.5 var(--font-body);overscroll-behavior:none}
h1,h2,h3,h4{font-family:var(--font-title);margin:0 0 .4em;line-height:1.25}
button{font:inherit;color:inherit}
.app{height:100%;display:flex;flex-direction:column}
.boot{margin:auto;text-align:center;color:var(--red-d);font-family:var(--font-title);font-size:1.4rem}

/* ---------- Vào chơi ---------- */
.screen{min-height:100%;display:grid;place-items:center;padding:20px;background:linear-gradient(160deg,var(--red-d),var(--red))}
.panel{width:100%;max-width:460px;background:var(--card);border-radius:22px;padding:28px 24px;text-align:center;box-shadow:0 18px 50px rgba(0,0,0,.3)}
.panel .logo{width:72px;height:72px}
.panel h1{font-size:1.9rem;color:var(--red-d);margin-top:.3em}
.panel .tagline{font-family:var(--font-title);font-style:italic;color:var(--red);margin:0 0 .6em}
.panel .sub{color:var(--muted);margin:.3em 0 1em}
.panel label{display:block;text-align:left;font-weight:600;margin-bottom:10px}
.panel input{display:block;width:100%;margin-top:6px;padding:14px;border:2px solid var(--line);border-radius:12px;font:inherit;font-size:1.15rem}
.panel input:focus{outline:none;border-color:var(--red)}
.panel input.code{text-align:center;font-size:2rem;letter-spacing:.25em;font-weight:700}
.pin-big{font:700 3.4rem var(--font-title);letter-spacing:.2em;color:var(--red);margin:.1em 0}
.err{color:var(--bad);min-height:1.4em;margin:.3em 0;font-weight:600}
.link{background:none;border:0;color:var(--red-d);text-decoration:underline;margin-top:14px;padding:8px;cursor:pointer}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:10px 22px;border:2px solid var(--line);border-radius:14px;background:#fff;font-weight:700;cursor:pointer}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.primary:active{background:var(--red-d)}
.btn.block{display:flex;width:100%;margin:12px 0}
.btn.small{min-height:40px;padding:6px 14px;font-size:.95rem}
.btn:disabled{opacity:.5}

/* ---------- Đầu trang ---------- */
.top{flex:none;display:flex;align-items:center;gap:12px;padding:10px 16px;padding-top:max(10px,env(safe-area-inset-top));background:var(--red-d);color:#fff}
.top-l{flex:1;min-width:0;display:flex;flex-direction:column}
.top .team{font:700 1.2rem var(--font-title);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top .where{font-size:.9rem;opacity:.85;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top .leader{flex:none;max-width:34%;background:rgba(255,255,255,.14);border:0;border-radius:999px;color:#fff;padding:8px 14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer}
.top .clock{flex:none;min-width:104px;text-align:center;font:700 1.9rem/1 ui-monospace,"SF Mono",Consolas,monospace;background:#fff;color:var(--red-d);border-radius:12px;padding:8px 12px}
.top .clock.warn{background:#ffd0ca;color:var(--red-d)}
.top .clock.up{background:var(--ink);color:#fff}
.offline{flex:none;background:var(--ink);color:#fff;text-align:center;padding:6px;font-weight:600}

/* ---------- Thân trang ---------- */
.main{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:16px;padding-bottom:calc(110px + env(safe-area-inset-bottom))}
.main>*{max-width:980px;margin-left:auto;margin-right:auto}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 20px;margin-bottom:14px;box-shadow:0 1px 3px rgba(43,37,35,.06)}
.card h3{color:var(--red-d);font-size:1.2rem}
.card h4{font-size:1rem;margin-top:.6em}
.center{text-align:center;padding:8vh 12px}
.center .prog{font-size:clamp(2rem,6vw,3.4rem);color:var(--red);letter-spacing:.03em}
.tagline{font-family:var(--font-title);font-style:italic;color:var(--red-d);font-size:1.15rem}
.total-big{font:700 5rem/1 var(--font-title);color:var(--red);margin:.2em 0}
.total-big small{display:block;font:600 1rem var(--font-body);color:var(--muted)}
.rank{text-align:center;font-size:1.15rem}
.won{font-size:1.2rem;font-weight:700;color:var(--red-d)}
.muted{color:var(--muted)}
.big{font-size:1.2rem;font-weight:600}
.foot{color:var(--muted);font-size:.92rem;margin-bottom:0}

.round .year{font:700 3.2rem/1 var(--font-title);color:var(--red)}
.round h2{font-size:1.7rem}
.round .facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px 18px;margin:12px 0}
.round .facts small{display:block;color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.06em}
.round blockquote{margin:12px 0 0;padding:12px 16px;border-left:5px solid var(--gold);background:#fdf1ef;border-radius:0 12px 12px 0;font-family:var(--font-title);font-size:1.15rem;font-style:italic}
.ask{background:#fdf1ef;border-color:var(--gold)}
.bridge{background:var(--red-d);color:#fff;font:italic 1.3rem var(--font-title);text-align:center}
.banner{border-radius:14px;padding:12px 16px;margin-bottom:12px;font-weight:700;text-align:center}
.banner.ok{background:#efe9e7;color:var(--ok)}
.banner.warn{background:var(--ink);color:#fff}

/* ---------- Tab, tiến độ ---------- */
.tabs{display:flex;gap:8px;margin-bottom:12px;position:sticky;top:-16px;z-index:5;background:var(--cream);padding:8px 0}
.tabs button{flex:1;min-height:52px;border:2px solid var(--line);border-radius:14px;background:#fff;font-weight:700;cursor:pointer}
.tabs button.on{background:var(--red);border-color:var(--red);color:#fff}
.progress{height:10px;background:var(--line);border-radius:999px;overflow:hidden;margin-bottom:12px}
.progress i{display:block;height:100%;background:var(--red);transition:width .25s}
.star-rule{background:#fdf1ef;border:1px dashed var(--gold);border-radius:12px;padding:10px 14px;margin:0 auto 12px}

/* ---------- Câu hỏi ---------- */
.q.starred{border-color:var(--gold);box-shadow:0 0 0 3px rgba(197,40,28,.22)}
.q-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.q-n{font:700 1.15rem var(--font-title);color:var(--red-d)}
.q-res{font-weight:700}
.q-res.ok{color:var(--ok)} .q-res.bad{color:var(--bad)}
.star{margin-left:auto;min-height:44px;padding:6px 14px;border:2px solid var(--gold);border-radius:999px;background:#fff;font-weight:700;cursor:pointer}
.star.on{background:var(--red);color:#fff}
.star:disabled{cursor:default}
.q-text{font-size:1.1rem;font-weight:600;margin:.2em 0 .8em}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.opt{display:flex;align-items:center;gap:12px;min-height:60px;padding:10px 14px;border:2px solid var(--line);border-radius:14px;background:#fff;text-align:left;cursor:pointer}
.opt b{flex:none;width:36px;height:36px;display:grid;place-items:center;border-radius:50%;background:var(--cream);font-family:var(--font-title)}
.opt.sel{background:var(--red);border-color:var(--red-d);color:#fff;font-weight:700}
.opt.sel b{background:#fff;color:var(--red-d)}
.opt:disabled{cursor:default;opacity:1}
.opt.right{border-color:var(--ok);background:#efe9e7;color:var(--ink)}
.opt.right b{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:#fdecea;color:var(--ink)}
.opt.wrong b{background:var(--bad);color:#fff}
.explain{margin:12px 0 0;padding:10px 14px;background:var(--cream);border-radius:12px}
.submit-bar{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px;padding-bottom:max(12px,env(safe-area-inset-bottom));background:#fff;border-top:2px solid var(--line);box-shadow:0 -6px 20px rgba(43,37,35,.1)}
.submit-bar span{font-weight:700}
.submit-bar .btn{min-width:180px}
.fab{position:fixed;right:16px;bottom:96px;z-index:21;width:56px;height:56px;border:0;border-radius:50%;background:var(--ink);font-size:1.5rem;box-shadow:0 6px 16px rgba(0,0,0,.3);cursor:pointer}

/* ---------- Kết quả ---------- */
.score-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;text-align:center}
.score-row>div{background:var(--cream);border-radius:14px;padding:10px}
.score-row b{display:block;font:700 2.2rem/1.1 var(--font-title);color:var(--red-d)}
.score-row small{display:block;color:var(--muted);font-size:.82rem}
.score-row .sum{background:var(--red);color:#fff}
.score-row .sum b,.score-row .sum small{color:#fff}

/* ---------- Hồ sơ ---------- */
.notes{margin:.2em 0 .8em;padding-left:20px}
.notes li{margin:.25em 0}
.tbl-wrap{overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;font-size:.97rem}
.tbl th,.tbl td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.tbl thead th{background:var(--red-d);color:#fff}
.tbl tbody th{background:var(--cream);white-space:nowrap}
.tag{display:inline-block;background:var(--red-d);color:#fff;border-radius:999px;padding:2px 12px;font-size:.82rem;font-weight:700;margin-bottom:8px}
.secret{position:relative;overflow:hidden;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;border:2px dashed var(--red)}
.secret::after{content:attr(data-mark) "  ·  " attr(data-mark) "  ·  " attr(data-mark);position:absolute;inset:0;display:grid;place-items:center;font:700 2.2rem var(--font-title);color:rgba(197,40,28,.09);transform:rotate(-14deg);white-space:nowrap;pointer-events:none}
.twist{background:#fdf1ef;border-color:var(--gold)}
.envelope.closed{text-align:center;background:#fdf1ef;border:2px dashed var(--gold)}
.env-ico{font-size:3.4rem;line-height:1}
.envelope.open{border:2px solid var(--gold);background:#fdf1ef}
.ref{margin:0 auto 12px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:6px 14px}
.ref summary{min-height:44px;display:flex;align-items:center;font-weight:700;cursor:pointer}
.ref[open]{padding-bottom:10px}

/* ---------- Hộp thoại ---------- */
.modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:18px;background:rgba(43,37,35,.6)}
.modal[hidden]{display:none}
.modal-box{width:100%;max-width:520px;max-height:90vh;overflow:auto;background:#fff;border-radius:22px;padding:24px;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.modal-box h3{color:var(--red-d);font-size:1.4rem}
.modal-box input[type=text]{width:100%;padding:14px;border:2px solid var(--line);border-radius:12px;font:inherit;font-size:1.1rem}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:18px}
.modal-actions .btn{flex:1}
.check{list-style:none;padding:0;margin:.6em 0}
.check li{padding:8px 12px;border-radius:10px;margin-bottom:6px;background:var(--cream);font-weight:600}
.check .ok{color:var(--ok)} .check .bad,.bad{color:var(--bad)}
.pop{text-align:center}
.pop-ico{font-size:4rem;line-height:1.1}
.pop-ico.flap{animation:flap .9s ease-out}
@keyframes flap{0%{transform:scale(.3) rotate(-25deg);opacity:0}60%{transform:scale(1.25) rotate(8deg);opacity:1}100%{transform:none}}
.calc-out{background:var(--ink);color:#fff;border-radius:12px;padding:14px;text-align:right;font:700 1.7rem ui-monospace,Consolas,monospace;min-height:62px;overflow-x:auto;white-space:nowrap}
.calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:10px}
.calc-keys button{min-height:56px;border:1px solid var(--line);border-radius:12px;background:var(--cream);font-size:1.3rem;font-weight:700;cursor:pointer}
.calc-keys .eq{grid-column:span 4;background:var(--red);border-color:var(--red);color:#fff}

.toast{position:fixed;left:50%;bottom:110px;transform:translateX(-50%);z-index:120;background:var(--ink);color:#fff;padding:12px 20px;border-radius:999px;font-weight:600;max-width:90vw;text-align:center}
.bq-audio-btn{position:fixed;left:12px;bottom:12px;z-index:60;width:40px;height:40px;border:0;border-radius:50%;background:rgba(43,37,35,.75);color:#fff;font-size:1.05rem;opacity:.8;cursor:pointer}
.bq-audio-btn.off{opacity:.5}

@media (max-width:640px){
  body{font-size:16px}
  .opts{grid-template-columns:1fr}
  .top .leader{display:none}
  .top .clock{min-width:86px;font-size:1.5rem}
  .submit-bar .btn{min-width:130px}
}

/* ---------- 0.3.0: đề BGĐ, ghi chú chuẩn bị, cam kết ---------- */
.bgd-card .prompt{font-size:1.08rem;font-weight:600;background:var(--cream);border-radius:12px;padding:12px 14px;margin:.4em 0}
.bgd-card textarea{display:block;width:100%;padding:12px 14px;border:2px solid var(--line);border-radius:12px;font:inherit;line-height:1.5;resize:vertical;min-height:150px}
.bgd-card textarea:focus{outline:none;border-color:var(--red)}
.prep-read{background:var(--cream);border-radius:12px;padding:12px 14px;white-space:normal}
.tabs button{font-size:.95rem;padding:0 6px}
.commits{list-style:none;margin:.4em 0;padding:0}
.commits li{display:flex;gap:10px;align-items:center;padding:10px 12px;margin-bottom:6px;background:#fff;border:1px solid var(--line);border-radius:12px}
.commits li b{flex:none;max-width:35%}
.commits li span{flex:1}
.commits .x{flex:none;width:40px;height:40px;border:0;border-radius:50%;background:var(--cream);font-size:1.3rem;cursor:pointer}
.commit-form{display:grid;grid-template-columns:1fr 2.4fr auto;gap:8px;margin-top:8px}
.commit-form input{padding:12px;border:2px solid var(--line);border-radius:12px;font:inherit;min-width:0}
@media (max-width:640px){.commit-form{grid-template-columns:1fr}}

/* ---------- 0.4.0: trắc nghiệm từng nhịp ---------- */
.beat-strip{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;background:var(--red-d);color:#fff;border-radius:14px;padding:10px 16px;margin-bottom:12px;font-weight:600}
.beat-strip b{font:700 1.4rem var(--font-title)}