/* ===== Chạy trạm Giải phẫu ===== */
:root{
  --ink:#16222b; --ink-2:#4a5a66; --ink-3:#7d8b95;
  --paper:#f4f1ec; --card:#fffdfa; --line:#e2ddd4; --line-2:#cfc8bc;
  --brand:#0e5a62; --brand-2:#0b474e; --brand-soft:#dcecea;
  --accent:#b8432f; --accent-soft:#f7e3dd;
  --ok:#2e7d4f; --ok-soft:#e0f0e6; --warn:#b7791f; --warn-soft:#fbf0d9;
  --radius:12px; --shadow:0 1px 2px rgba(22,34,43,.06),0 6px 18px rgba(22,34,43,.06);
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:var(--font);color:var(--ink);background:var(--paper);font-size:15.5px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--brand)}
img{max-width:100%}
code{background:#efeae2;padding:1px 6px;border-radius:5px;font-size:.92em}
h1,h2,h3{line-height:1.25;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:1.6rem} h2{font-size:1.25rem} h3{font-size:1.05rem}
.muted{color:var(--ink-3)} .small{font-size:.88rem}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
.wrap-narrow{max-width:520px;margin:0 auto;padding:0 16px}

/* top bar */
.topbar{background:var(--brand);color:#fff}
.topbar .wrap{display:flex;align-items:center;gap:16px;min-height:56px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:#fff;text-decoration:none;letter-spacing:.01em}
.brand-mark{width:28px;height:28px;border-radius:8px;background:#fff;color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:14px}
.topbar nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
.topbar nav a{color:#d9ecea;text-decoration:none;padding:6px 10px;border-radius:8px;font-size:.93rem}
.topbar nav a:hover,.topbar nav a.on{background:rgba(255,255,255,.12);color:#fff}

main{padding:28px 0 60px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.card + .card{margin-top:16px}
.card-h{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.card-h h2,.card-h h3{margin:0}
.card-h .sp{margin-left:auto}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:600;font-size:.93rem;border:1px solid var(--line-2);background:#fff;color:var(--ink);padding:8px 14px;border-radius:9px;cursor:pointer;text-decoration:none;line-height:1.2;white-space:nowrap}
.btn:hover{border-color:var(--ink-3)}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2);border-color:var(--brand-2)}
.btn-danger{color:var(--accent);border-color:#e7c3ba}
.btn-danger:hover{background:var(--accent-soft);border-color:var(--accent)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--ink-2)}
.btn-ghost:hover{background:#ece7de;border-color:transparent}
.btn-sm{padding:5px 10px;font-size:.85rem;border-radius:7px}
.btn-lg{padding:12px 22px;font-size:1.02rem;border-radius:11px}
.btn-block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.inline{display:inline}

/* forms */
label.f{display:block;margin-bottom:14px}
label.f > span{display:block;font-weight:600;font-size:.9rem;margin-bottom:5px}
label.f > small{display:block;color:var(--ink-3);font-size:.83rem;margin-top:4px}
input[type=text],input[type=password],input[type=number],textarea,select{font:inherit;width:100%;padding:9px 11px;border:1px solid var(--line-2);border-radius:9px;background:#fff;color:var(--ink)}
textarea{resize:vertical;min-height:70px}
input:focus,textarea:focus,select:focus{outline:2px solid var(--brand-soft);border-color:var(--brand)}
.check{display:flex;gap:9px;align-items:flex-start;margin-bottom:12px;cursor:pointer}
.check input{margin-top:4px;width:17px;height:17px;accent-color:var(--brand)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:0 18px}
@media (max-width:720px){.grid2,.grid3{grid-template-columns:1fr}}

/* alerts */
.alert{padding:11px 14px;border-radius:10px;margin-bottom:16px;border:1px solid}
.alert-ok{background:var(--ok-soft);border-color:#b9dcc6;color:#1e5a37}
.alert-err{background:var(--accent-soft);border-color:#ebc0b6;color:#7f2b1d}
.alert-info{background:var(--brand-soft);border-color:#b6d6d2;color:#0b474e}

/* tables */
.tbl-wrap{overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse;font-size:.93rem}
.tbl th,.tbl td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
.tbl th{font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-3);font-weight:600;background:#f8f5f0}
.tbl td.num,.tbl th.num{text-align:right;font-variant-numeric:tabular-nums}
.tbl tr:hover td{background:#faf7f2}
.tag{display:inline-block;padding:2px 8px;border-radius:99px;font-size:.78rem;font-weight:600;background:#ece7de;color:var(--ink-2)}
.tag-ok{background:var(--ok-soft);color:var(--ok)} .tag-warn{background:var(--warn-soft);color:var(--warn)}
.tag-brand{background:var(--brand-soft);color:var(--brand)} .tag-red{background:var(--accent-soft);color:var(--accent)}

/* ===== Student entry ===== */
.hero{padding:44px 0 8px;text-align:center}
.hero .org{font-size:.85rem;text-transform:uppercase;letter-spacing:.12em;color:var(--brand);font-weight:700}
.hero h1{font-size:2rem;margin:.3em 0}
.exam-pick{display:block;border:1px solid var(--line);border-radius:11px;padding:14px 16px;margin-bottom:10px;text-decoration:none;color:inherit;background:#fff}
.exam-pick:hover{border-color:var(--brand)}
.exam-pick b{display:block;font-size:1.05rem}
.facts{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;margin:14px 0 22px;color:var(--ink-2);font-size:.93rem}
.facts b{color:var(--ink)}

/* ===== Exam stage ===== */
body.exam{background:#ece8e1}
.ex-bar{position:sticky;top:0;z-index:30;background:var(--ink);color:#fff;box-shadow:0 2px 10px rgba(0,0,0,.18)}
.ex-bar .wrap{max-width:1400px;display:flex;align-items:center;gap:14px;min-height:62px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.ex-station{display:flex;align-items:baseline;gap:8px}
.ex-station .lbl{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:#9fb3bd}
.ex-station .val{font-size:1.5rem;font-weight:800;font-variant-numeric:tabular-nums}
.ex-station .of{color:#9fb3bd;font-weight:600}
.ex-name{color:#cfdbe1;font-size:.92rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:260px}
.ex-timer{margin-left:auto;display:flex;align-items:center;gap:10px}
.ex-clock{font-size:2rem;font-weight:800;font-variant-numeric:tabular-nums;min-width:96px;text-align:right;letter-spacing:.02em}
.ex-timer.warn .ex-clock{color:#ffcf6e}
.ex-timer.crit .ex-clock{color:#ff8a73;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}
.ex-progress{height:5px;background:rgba(255,255,255,.12)}
.ex-progress i{display:block;height:100%;background:#5fc2b8;width:100%;transition:width .25s linear}
.ex-timer.warn~.x{}
.ex-dots{display:flex;gap:4px;flex-wrap:wrap}
.ex-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.18)}
.ex-dots span.done{background:#5fc2b8}.ex-dots span.cur{background:#fff;box-shadow:0 0 0 2px rgba(255,255,255,.35)}

.ex-main{max-width:1400px;margin:0 auto;padding:16px}
.qgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.qgrid.n1{grid-template-columns:minmax(0,900px);justify-content:center}
@media (max-width:900px){.qgrid{grid-template-columns:1fr}}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;display:flex;flex-direction:column;gap:10px;min-width:0}
.qhead{display:flex;align-items:center;gap:10px}
.qnum{background:var(--brand);color:#fff;font-weight:800;border-radius:8px;padding:3px 10px;font-size:.9rem}
.qtype{font-size:.8rem;color:var(--ink-3);font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.qpts{margin-left:auto;font-size:.82rem;color:var(--ink-3)}
.qprompt{font-weight:600}

.stage{position:relative;line-height:0;border-radius:9px;overflow:hidden;background:#111;user-select:none;-webkit-user-select:none;touch-action:none}
.stage img{width:100%;height:auto;display:block;pointer-events:none;-webkit-user-drag:none}

/* placed pins (SV) */
.mk{position:absolute;transform:translate(-50%,-50%);line-height:1;z-index:3;cursor:grab;touch-action:none}
.mk .dot{width:16px;height:16px;border-radius:50%;background:#ffd23f;border:3px solid #1b1b1b;box-shadow:0 0 0 2px #fff;display:block}
.mk .tx{position:absolute;left:14px;top:-26px;background:rgba(17,24,32,.9);color:#fff;font-size:12.5px;font-weight:600;padding:4px 8px;border-radius:6px;white-space:nowrap;pointer-events:none}
.mk.flip .tx{left:auto;right:14px}
.tray{display:flex;flex-wrap:wrap;gap:8px;padding:10px;border:1.5px dashed var(--line-2);border-radius:10px;min-height:52px;background:#faf7f2}
.tray .hint{color:var(--ink-3);font-size:.85rem;align-self:center}
.chip{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line-2);border-radius:99px;padding:6px 12px 6px 8px;font-weight:600;font-size:.9rem;cursor:grab;touch-action:none;user-select:none;-webkit-user-select:none;box-shadow:0 1px 2px rgba(0,0,0,.05)}
.chip .dot{width:14px;height:14px;border-radius:50%;background:#ffd23f;border:2.5px solid #1b1b1b;flex:none}
.chip.used{opacity:.4;cursor:default;box-shadow:none}
.chip.used .dot{background:#bbb}
.drag-ghost{position:fixed;z-index:1000;pointer-events:none;transform:translate(-50%,-50%);line-height:1}
.drag-ghost .dot{width:18px;height:18px;border-radius:50%;background:#ffd23f;border:3px solid #1b1b1b;box-shadow:0 0 0 2px #fff,0 4px 12px rgba(0,0,0,.35);display:block}
.drag-ghost .tx{position:absolute;left:16px;top:-28px;background:#111;color:#fff;font:600 12.5px var(--font);padding:4px 8px;border-radius:6px;white-space:nowrap}
.stage.hover{outline:3px solid #5fc2b8;outline-offset:-3px}

/* numbered pins (gõ tên) */
.np{position:absolute;transform:translate(-50%,-50%);z-index:3;line-height:1;pointer-events:none}
.np b{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#ffd23f;color:#111;font-weight:800;font-size:14px;border:2.5px solid #111;box-shadow:0 0 0 2px #fff,0 2px 6px rgba(0,0,0,.4)}
.np.sm b{width:24px;height:24px;font-size:12.5px}
.np::after{content:"";position:absolute;left:50%;top:50%;width:6px;height:6px;margin:-3px 0 0 -3px;border-radius:50%;background:#111;display:none}
.answers{display:grid;gap:8px}
.ans{display:flex;align-items:center;gap:8px}
.ans b{display:grid;place-items:center;flex:none;width:28px;height:28px;border-radius:50%;background:#ffd23f;border:2px solid #111;font-weight:800;font-size:13px}
.ans input{padding:9px 11px}

.ex-foot{display:flex;justify-content:center;gap:10px;margin:18px 0 6px}
.saving{font-size:.8rem;color:#9fb3bd;min-width:70px}

/* overlay */
.overlay{position:fixed;inset:0;background:rgba(15,24,30,.72);z-index:100;display:grid;place-items:center;padding:16px;backdrop-filter:blur(3px)}
.overlay .box{background:var(--card);border-radius:16px;max-width:520px;width:100%;padding:28px;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.overlay h2{font-size:1.4rem}
.overlay ul{text-align:left;color:var(--ink-2);padding-left:20px;margin:14px 0 22px}
.overlay li{margin-bottom:6px}
.flash-next{position:fixed;inset:0;z-index:90;display:grid;place-items:center;pointer-events:none}
.flash-next div{background:var(--ink);color:#fff;font-size:1.6rem;font-weight:800;padding:18px 34px;border-radius:14px;box-shadow:0 18px 50px rgba(0,0,0,.4);animation:pop 1.1s ease forwards}
@keyframes pop{0%{transform:scale(.8);opacity:0}15%{transform:scale(1);opacity:1}80%{opacity:1}100%{opacity:0}}

/* ===== Result ===== */
.score-big{text-align:center;padding:10px 0 4px}
.score-big .n{font-size:3.6rem;font-weight:800;color:var(--brand);line-height:1;font-variant-numeric:tabular-nums}
.score-big .d{color:var(--ink-3);font-weight:600}
.review-q{border-top:1px solid var(--line);padding-top:14px;margin-top:14px}
.zone{position:absolute;transform:translate(-50%,-50%);border-radius:50%;border:2.5px dashed #5fe0a8;background:rgba(95,224,168,.16);aspect-ratio:1;pointer-events:none;z-index:2}
.mk.bad .dot{background:#ff6b57}
.mk.good .dot{background:#5fe0a8}
.mk.static{cursor:default}
.res-list{list-style:none;padding:0;margin:8px 0 0}
.res-list li{display:flex;gap:8px;align-items:baseline;padding:5px 0;border-bottom:1px dashed var(--line)}
.res-list li:last-child{border:0}
.ok{color:var(--ok);font-weight:700} .bad{color:var(--accent);font-weight:700} .half{color:var(--warn);font-weight:700}

/* ===== Admin ===== */
.station{border:1px solid var(--line);border-radius:11px;background:#fff;margin-bottom:14px}
.station-h{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line);background:#f8f5f0;border-radius:11px 11px 0 0;flex-wrap:wrap}
.station-h .snum{font-weight:800;color:var(--brand)}
.station-h form.rename{display:flex;gap:6px;flex:1;min-width:180px}
.station-h form.rename input{padding:5px 9px;font-size:.92rem}
.qlist{padding:8px 14px 12px}
.qrow{display:flex;align-items:center;gap:12px;padding:8px 0;border-bottom:1px dashed var(--line)}
.qrow:last-child{border:0}
.qthumb{width:72px;height:48px;object-fit:cover;border-radius:6px;background:#222;flex:none}
.qrow .qinfo{flex:1;min-width:0}
.qrow .qinfo b{display:block;font-size:.93rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.qrow .acts{display:flex;gap:4px;flex-wrap:wrap}
.empty{padding:14px;text-align:center;color:var(--ink-3);font-size:.92rem}
.warnline{color:var(--warn);font-size:.83rem;font-weight:600}

/* editor */
.ed{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,1fr);gap:18px;align-items:start}
@media (max-width:900px){.ed{grid-template-columns:1fr}}
.ed-stage{position:relative;line-height:0;border-radius:10px;overflow:hidden;background:#111;cursor:crosshair;user-select:none;touch-action:none;min-height:120px}
.ed-stage img{width:100%;display:block;pointer-events:none;-webkit-user-drag:none}
.ed-stage .ph{line-height:1.5;color:#aab;padding:60px 20px;text-align:center}
.ed-zone{position:absolute;transform:translate(-50%,-50%);border-radius:50%;aspect-ratio:1;border:2.5px solid #ffd23f;background:rgba(255,210,63,.18);cursor:move;touch-action:none}
.ed-zone.sel{border-color:#5fe0a8;background:rgba(95,224,168,.22);box-shadow:0 0 0 2px rgba(0,0,0,.35)}
.ed-zone .c{position:absolute;left:50%;top:50%;width:6px;height:6px;margin:-3px 0 0 -3px;border-radius:50%;background:#111;border:1px solid #fff}
.ed-zone .tx{position:absolute;left:100%;top:0;margin-left:4px;background:rgba(17,24,32,.9);color:#fff;font-size:12px;font-weight:600;padding:3px 7px;border-radius:5px;white-space:nowrap;line-height:1.2}
.ed-pin{position:absolute;transform:translate(-50%,-50%);cursor:move;touch-action:none;line-height:1}
.ed-pin b{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:#ffd23f;color:#111;font-weight:800;font-size:14px;border:2.5px solid #111;box-shadow:0 0 0 2px #fff}
.ed-pin.sel b{background:#5fe0a8}
.items{display:grid;gap:10px}
.item{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:#fff}
.item.sel{border-color:#5fbba5;box-shadow:0 0 0 2px #d4efe7}
.item-h{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.item-h b{font-size:.9rem}
.item-h .del{margin-left:auto}
.item input[type=text],.item textarea{font-size:.92rem;padding:7px 9px}
.item textarea{min-height:64px}
.item input[type=range]{width:100%;accent-color:var(--brand)}
.helpbox{background:var(--brand-soft);border-radius:10px;padding:10px 12px;font-size:.88rem;color:var(--brand-2);margin-bottom:12px}
.linkbox{display:flex;gap:6px}
.linkbox input{font-size:.88rem;background:#f8f5f0}
.stat{display:flex;gap:22px;flex-wrap:wrap;margin:4px 0 14px}
.stat div b{display:block;font-size:1.35rem;font-variant-numeric:tabular-nums}
.stat div span{font-size:.8rem;color:var(--ink-3);text-transform:uppercase;letter-spacing:.05em}
footer.ft{text-align:center;color:var(--ink-3);font-size:.82rem;padding:20px 0 30px}

/* Ảnh trong trang thi: giới hạn chiều cao để mỗi câu nằm gọn trong màn hình */
.qcard .stage{width:fit-content;max-width:100%;margin:0 auto}
.qcard .stage img{width:auto;max-width:100%;max-height:62vh}
@media (max-width:600px){
  .ex-bar .wrap{flex-wrap:nowrap;min-height:54px}
  .ex-name,.ex-dots{display:none}
  .ex-clock{font-size:1.7rem;min-width:80px}
  .ex-station .val{font-size:1.3rem}
  .saving{display:none}
}

/* ===== v2: tài khoản ===== */
.topbar nav a.nav-cta{background:#fff;color:var(--brand);font-weight:700}
.topbar nav a.nav-cta:hover{background:#e8f3f1;color:var(--brand-2)}
.badge-free{background:var(--ok-soft);color:var(--ok)}
.badge-paid{background:var(--warn-soft);color:var(--warn)}
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.plan{border:1.5px solid var(--line);border-radius:12px;padding:16px;background:#fff;display:flex;flex-direction:column;gap:6px}
.plan:hover{border-color:var(--brand)}
.plan .pn{font-weight:700}
.plan .pp{font-size:1.6rem;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums}
.plan .pd{color:var(--ink-3);font-size:.88rem}
.pay{display:grid;grid-template-columns:300px 1fr;gap:22px;align-items:start}
@media (max-width:720px){.pay{grid-template-columns:1fr}}
.pay img.qr{width:100%;max-width:300px;border-radius:12px;border:1px solid var(--line);background:#fff;display:block;margin:0 auto}
.kv{display:grid;grid-template-columns:auto 1fr auto;gap:8px 12px;align-items:center}
.kv dt{color:var(--ink-3);font-size:.88rem}
.kv dd{margin:0;font-weight:700;font-size:1.05rem;word-break:break-all}
.copy{padding:3px 9px;font-size:.8rem}
.waiting{display:flex;align-items:center;gap:10px;color:var(--ink-2)}
.spin{width:18px;height:18px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--brand);animation:sp 1s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.rank-me td{background:var(--brand-soft)!important}
.medal{font-size:1.15rem}
.spark{display:block}
.exam-pick .row{margin-top:4px}
.lock-note{font-size:.85rem;color:var(--warn);font-weight:600}