/* ───── auth / landing ───── */
.auth{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}
.hero{background:var(--maroon-d);color:#fff;padding:44px 52px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden;
  background-image:linear-gradient(160deg,var(--maroon) 0%,var(--maroon-d) 70%)}
.hero:after{content:"";position:absolute;right:-90px;bottom:-90px;width:380px;height:380px;border-radius:50%;border:48px solid rgba(255,228,51,.08)}
.hero .brand{border-color:#fff;align-self:flex-start;background:transparent} .hero .brand b{background:#fff;color:var(--maroon)} .hero .brand span{background:transparent;color:#fff}
.hero .clock{font-family:var(--f-serif);font-weight:800;font-size:clamp(56px,9vw,112px);line-height:1;letter-spacing:-1px;margin:30px 0 6px;font-variant-numeric:tabular-nums}
.hero .clock small{font-family:var(--f-ui);font-size:17px;font-weight:400;letter-spacing:0;opacity:.8;display:block;margin-top:10px}
.hero h1{font-family:var(--f-serif);font-size:clamp(26px,3.2vw,38px);font-weight:700;max-width:16em}
.hero p{max-width:30em;opacity:.88}
.hero .facts{display:flex;gap:28px;flex-wrap:wrap;margin-top:26px}
.hero .facts div{border-left:3px solid var(--yellow);padding-left:12px} .hero .facts b{display:block;font-family:var(--f-serif);font-size:29px}
.hero .facts span{font-size:14.5px;opacity:.8}
.auth-side{padding:40px 5vw;display:flex;align-items:center;justify-content:center;background:var(--peach)}
.auth-card{width:100%;max-width:720px;background:#fff;border-radius:20px;padding:28px 30px 30px;box-shadow:var(--shadow);border:1px solid var(--blush)}
.auth-card h2{font-size:17px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;text-align:center;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:20px}
.tabs{display:flex;gap:4px;background:var(--peach);padding:4px;border-radius:12px;margin-bottom:20px}
.tabs button{flex:1;border:0;background:transparent;padding:9px;border-radius:9px;cursor:pointer;font-weight:500;color:var(--maroon-d)}
.tabs button.on{background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.1);font-weight:600}
.form2{display:grid;grid-template-columns:1fr 1fr;gap:16px 26px}
details.more{margin-top:18px;border:1px dashed var(--blush);border-radius:12px;padding:12px 14px;background:#faf6f3}
details.more summary{cursor:pointer;font-weight:600;font-size:15.5px}
.notice{background:var(--yellow);color:var(--maroon-d);padding:8px 14px;font-size:15.5px;text-align:center;font-weight:500}
@media(max-width:900px){.auth{grid-template-columns:1fr}.hero{padding:28px 22px}.hero .clock{margin-top:18px}.form2{grid-template-columns:1fr}}

/* ───── shell ───── */
.topbar{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line)}
.topbar .in{max-width:1180px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:22px}
.nav{display:flex;gap:2px;flex:1;overflow-x:auto}
.nav a{padding:8px 14px;border-radius:9px;color:var(--ink);text-decoration:none;font-size:16px;white-space:nowrap}
.nav a:hover{background:var(--peach)} .nav a.on{background:var(--maroon);color:#fff}
.me{display:flex;align-items:center;gap:10px}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--yellow);color:var(--maroon-d);display:grid;place-items:center;font-weight:700;border:2px solid var(--maroon);font-family:var(--f-serif)}
.bell{position:relative;background:none;border:0;cursor:pointer;padding:6px}
.bell i{position:absolute;top:2px;right:2px;background:var(--bad);color:#fff;font-size:11px;font-style:normal;min-width:16px;height:16px;border-radius:8px;display:grid;place-items:center}
.page{max-width:1180px;margin:0 auto;padding:26px 20px 70px}
.page h1{font-family:var(--f-serif);font-size:33.5px;font-weight:700;color:var(--maroon-d)}
.page .sub{color:var(--muted);margin:4px 0 22px}
@media(max-width:700px){.topbar .in{flex-wrap:wrap;gap:8px}.nav{order:3;flex-basis:100%}.me .nm{display:none}}

.kpi{display:flex;flex-direction:column;gap:2px}
.kpi b{font-family:var(--f-serif);font-size:36px;color:var(--maroon-d);line-height:1.1} .kpi span{font-size:14.5px;color:var(--muted)}
.resume{background:var(--maroon);color:#fff;border-radius:var(--r);padding:16px 20px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:18px}
.resume .btn{background:var(--yellow);color:var(--maroon-d);border-color:var(--yellow)}
.start{border:1.5px solid var(--line);border-radius:var(--r);padding:20px;background:#fff;display:flex;flex-direction:column;gap:10px;text-align:left}
.start.main{border-color:var(--maroon);background:linear-gradient(180deg,#fff,var(--peach))}
.start h3{font-family:var(--f-serif);font-size:21.5px;color:var(--maroon-d);margin:0}
.paper{position:relative;border:1.5px solid var(--line);border-radius:var(--r);padding:16px;background:#fff;display:flex;flex-direction:column;gap:8px}
.paper h4{font-family:var(--f-serif);font-size:21.5px;color:var(--maroon-d)}
.paper.locked{background:#faf4f1;border-style:dashed}
.paper .lock{position:absolute;top:12px;right:12px;font-size:13.5px}
.note{padding:10px 14px;border-radius:10px;font-size:15.5px}
.note.ok{background:var(--ok-bg);color:var(--ok)} .note.warn{background:var(--warn-bg);color:var(--warn)} .note.bad{background:var(--bad-bg);color:var(--bad)} .note.info{background:var(--info-bg);color:var(--info)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;counter-reset:s}
.steps>div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;position:relative;counter-increment:s}
.steps>div:before{content:counter(s);display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--maroon);color:#fff;font-size:14.5px;font-weight:600;margin-bottom:8px}
@media(max-width:800px){.steps{grid-template-columns:1fr 1fr}}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:99px;padding:5px 12px;font-size:14.5px;cursor:pointer}
.chip.on{background:var(--maroon);border-color:var(--maroon);color:#fff}
.note-item{padding:10px 0;border-top:1px solid var(--line);font-size:15.5px} .note-item:first-child{border-top:0}
.note-item.new{font-weight:500}

/* ───── exam ───── */
body.exam-mode{background:#f6efec}
.ex-top{position:sticky;top:0;z-index:40;background:var(--maroon-d);color:#fff;display:flex;align-items:center;gap:16px;padding:10px 18px;flex-wrap:wrap}
.ex-top h2{font-family:var(--f-serif);font-size:19px;flex:1;min-width:140px}
.timer{font-variant-numeric:tabular-nums;font-family:var(--f-serif);font-weight:700;font-size:29px;background:#fff;color:var(--maroon-d);padding:2px 14px;border-radius:10px;min-width:150px;text-align:center}
.timer.low{background:var(--bad);color:#fff;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.7}}
.ex-wrap{max-width:1240px;margin:0 auto;padding:18px;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px;align-items:start}
@media(max-width:960px){.ex-wrap{grid-template-columns:1fr}.palette{order:2}}
.q-card{background:#fff;border-radius:var(--r);border:1px solid var(--line);padding:24px 26px;box-shadow:var(--shadow)}
.q-head{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.q-no{font-family:var(--f-serif);font-weight:800;font-size:24.5px;color:var(--maroon)}
.q-body{font-size:var(--qfs,19px);line-height:1.7;margin-bottom:18px;white-space:pre-line}
.opt{display:flex;gap:14px;align-items:flex-start;width:100%;text-align:left;border:1.8px solid var(--line);background:#fff;border-radius:12px;padding:13px 16px;margin-bottom:10px;cursor:pointer;font-size:var(--qfs,19px);transition:border .1s,background .1s}
.opt:hover{border-color:var(--maroon-l);background:#fff8f5}
.opt .k{flex:0 0 32px;height:32px;border-radius:50%;border:1.8px solid #c9b6b1;display:grid;place-items:center;font-weight:600;font-size:15.5px;color:var(--muted)}
.opt.sel{border-color:var(--maroon);background:var(--peach)} .opt.sel .k{background:var(--maroon);border-color:var(--maroon);color:#fff}
.ex-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.palette{background:#fff;border-radius:var(--r);border:1px solid var(--line);padding:16px;position:sticky;top:76px}
.pal-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:12px 0}
.pn{aspect-ratio:1;border-radius:8px;border:1.5px solid #d9c7c1;background:#fff;cursor:pointer;font-size:14.5px;font-weight:500;position:relative}
.pn.ans{background:var(--ok);border-color:var(--ok);color:#fff} .pn.vis{background:var(--bad-bg);border-color:#e9a3a6;color:var(--bad)}
.pn.mark{background:#6b3fa0;border-color:#6b3fa0;color:#fff} .pn.cur{outline:3px solid var(--yellow);outline-offset:1px}
.pn.mark.ans:after{content:"";position:absolute;right:3px;top:3px;width:7px;height:7px;border-radius:50%;background:var(--yellow)}
.legend{display:grid;grid-template-columns:1fr 1fr;gap:6px;font-size:13.5px;color:var(--muted)} .legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:-1px;border:1.5px solid #d9c7c1}
.sync{font-size:13.5px;opacity:.85}

/* ───── result ───── */
.res-hero{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:var(--shadow)}
@media(max-width:700px){.res-hero{grid-template-columns:1fr;justify-items:center;text-align:center}}
.verdict{font-family:var(--f-serif);font-size:31.5px;font-weight:800}
.verdict.pass{color:var(--ok)} .verdict.fail{color:var(--bad)}
.rtabs{display:flex;gap:6px;margin:24px 0 16px;border-bottom:2px solid var(--line);overflow-x:auto}
.rtabs button{border:0;background:none;padding:10px 16px;cursor:pointer;font-weight:500;color:var(--muted);border-bottom:3px solid transparent;margin-bottom:-2px;white-space:nowrap}
.rtabs button.on{color:var(--maroon);border-bottom-color:var(--maroon);font-weight:600}
.sheet{display:grid;grid-template-columns:repeat(10,1fr);gap:6px}
@media(max-width:700px){.sheet{grid-template-columns:repeat(5,1fr)}}
.sh{border-radius:8px;padding:6px 2px;text-align:center;font-size:13.5px;border:1.5px solid;line-height:1.3;cursor:pointer;background:#fff}
.sh b{display:block;font-size:14.5px}
.sh.correct{background:var(--ok-bg);border-color:#9fd5b3;color:var(--ok)} .sh.wrong{background:var(--bad-bg);border-color:#efa9ac;color:var(--bad)} .sh.skipped{background:#f3eeec;border-color:#ddd0cb;color:#8a7c78}
.rv{background:#fff;border:1px solid var(--line);border-left-width:5px;border-radius:12px;padding:18px 20px;margin-bottom:14px}
.rv.correct{border-left-color:var(--ok)} .rv.wrong{border-left-color:var(--bad)} .rv.skipped{border-left-color:#b9aaa5}
.ro{display:flex;gap:10px;padding:8px 12px;border-radius:9px;margin:5px 0;border:1.5px solid transparent;font-size:17px}
.ro.right{background:var(--ok-bg);border-color:#9fd5b3} .ro.mine{background:var(--bad-bg);border-color:#efa9ac}
.ro .k{font-weight:700;min-width:22px} .ro .tg{margin-left:auto;font-size:13.5px;font-weight:600;white-space:nowrap}
.xp{background:#fffbea;border:1px solid #f1e2a0;border-radius:10px;padding:12px 14px;margin-top:10px;font-size:16px}
.xp b.h{display:block;font-size:13.5px;color:#8a6d00;margin-bottom:3px}
@media print{.topbar,.rtabs,.no-print,.ex-top{display:none!important}.page{padding:0}.rv,.res-hero{break-inside:avoid;box-shadow:none}body{background:#fff}}
.hero{gap:18px}

/* legal pages */
.legal{max-width:860px;margin:0 auto;padding:18px 16px 48px}
.legal-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.legal-body h1{margin-top:0}
.legal-text{white-space:pre-wrap;line-height:1.7;font-size:17px;margin-top:14px}
.legal-nav{margin-top:22px;padding-top:14px;border-top:1px solid var(--line)}
.shell-foot{text-align:center;padding:22px 16px 30px;color:var(--muted,#7a6a6a);font-size:14px}
/* book picker */
.pick{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.pick-i{position:relative;border:2px solid var(--line);border-radius:12px;padding:10px;display:flex;flex-direction:column;gap:8px;cursor:pointer;background:#fff;transition:border-color .15s,box-shadow .15s}
.pick-i:hover{border-color:var(--maroon-l)}
.pick-i input{position:absolute;top:10px;left:10px;width:20px;height:20px;accent-color:var(--maroon)}
.pick-i:has(input:checked){border-color:var(--maroon);box-shadow:0 0 0 3px rgba(177,17,23,.15)}
.pick-i img,.pick-i .ph{width:100%;height:150px;object-fit:contain;background:var(--peach);border-radius:8px}
.pick-i .ph{display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--maroon)}
.pick-i span b{display:block;font-size:15px;line-height:1.3} .pick-i small{color:#7a6a6a}