:root{
  --bg:#0b0b0f; --bg2:#141419; --card:#1b1b22; --card2:#23232c; --line:#2e2e39;
  --ink:#f4f4f6; --mute:#a0a0ad; --dim:#6c6c78;
  --red:#e50914; --red2:#ff2d3a; --blue:#1f80e0; --green:#2fbf71; --amber:#f5a524; --violet:#8b5cf6;
  --qa:linear-gradient(135deg,#1f80e0,#0b3d91); --lrdi:linear-gradient(135deg,#8b5cf6,#4c1d95); --varc:linear-gradient(135deg,#e50914,#7f1d1d);
  --r:14px; --shadow:0 10px 30px rgba(0,0,0,.45);
  --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 Inter,-apple-system,system-ui,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
img{max-width:100%;display:block}
.hidden{display:none!important}
::selection{background:var(--red);color:#fff}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:10px;font-weight:700;background:var(--card2);border:1px solid var(--line);transition:transform .12s,background .15s,border-color .15s;white-space:nowrap}
.btn:hover{background:#2c2c37}.btn:active{transform:scale(.97)}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}.btn.primary:hover{background:var(--red2)}
.btn.white{background:#fff;color:#000;border-color:#fff}.btn.white:hover{background:#e6e6e6}
.btn.ghost{background:transparent}
.btn.sm{padding:7px 12px;font-size:13px;border-radius:8px}
.btn.lg{padding:14px 26px;font-size:17px}
.btn[disabled]{opacity:.5;pointer-events:none}
.icon-btn{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--card2);border:1px solid var(--line)}

/* ---------- profile picker ---------- */
.who{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 16px;text-align:center;
  background:radial-gradient(1200px 600px at 50% -10%,#2a0b10 0%,transparent 60%),var(--bg)}
.brand{font-weight:900;letter-spacing:-.02em;color:var(--red);font-size:28px}
.brand span{color:var(--ink)}
.who .brand{position:absolute;top:22px;left:28px}
.who h1{font-size:clamp(28px,5vw,52px);font-weight:600;margin:0 0 34px;letter-spacing:-.01em}
.profiles{display:flex;flex-wrap:wrap;justify-content:center;gap:clamp(14px,3vw,30px);max-width:900px}
.ptile{width:clamp(96px,16vw,150px);display:flex;flex-direction:column;align-items:center;gap:12px;color:var(--mute);position:relative}
.ptile .av{width:100%;aspect-ratio:1;border-radius:12px;display:grid;place-items:center;font-size:clamp(40px,7vw,68px);border:3px solid transparent;transition:transform .18s,border-color .18s;box-shadow:var(--shadow)}
.ptile:hover .av,.ptile:focus-visible .av{border-color:#fff;transform:scale(1.05)}
.ptile:hover,.ptile:focus-visible{color:#fff;outline:none}
.ptile .nm{font-size:clamp(14px,1.8vw,18px);font-weight:500}
.ptile .lock{position:absolute;top:8px;right:8px;background:rgba(0,0,0,.55);border-radius:50%;width:26px;height:26px;display:grid;place-items:center;font-size:13px}
.ptile.add .av{background:transparent;border:3px dashed #4a4a55;color:#8a8a96;font-size:60px;font-weight:200;box-shadow:none}
.ptile .del{position:absolute;inset:0 0 auto 0;aspect-ratio:1;border-radius:12px;background:rgba(0,0,0,.6);display:grid;place-items:center;font-size:32px}
.who .manage{margin-top:46px;border:1px solid #6b6b75;color:#a8a8b3;padding:9px 26px;letter-spacing:.14em;font-size:14px;border-radius:4px}
.who .manage:hover{color:#fff;border-color:#fff}

/* ---------- modal ---------- */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.75);backdrop-filter:blur(6px);display:grid;place-items:center;z-index:50;padding:16px;animation:fade .2s}
.modal{background:var(--bg2);border:1px solid var(--line);border-radius:18px;padding:28px;width:min(420px,100%);text-align:center;box-shadow:var(--shadow)}
.modal h2{margin:0 0 6px}.modal p{color:var(--mute);margin:0 0 20px}
.pin{display:flex;gap:12px;justify-content:center;margin:10px 0 18px}
.pin input{width:56px;height:64px;text-align:center;font-size:28px;font-weight:700;border-radius:12px;background:var(--card);border:2px solid var(--line);outline:none}
.pin input:focus{border-color:#fff}
.pin.shake{animation:shake .35s}
@keyframes shake{25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}
@keyframes fade{from{opacity:0}}
@keyframes rise{from{opacity:0;transform:translateY(14px)}}

/* ---------- onboarding ---------- */
.onb{min-height:100vh;display:flex;flex-direction:column;background:radial-gradient(900px 500px at 80% 0%,#1d0f2f 0%,transparent 60%),radial-gradient(900px 500px at 0% 100%,#2a0b10 0%,transparent 60%),var(--bg)}
.onb-top{display:flex;align-items:center;justify-content:space-between;padding:22px 28px}
.dots{display:flex;gap:8px}.dots i{width:28px;height:4px;border-radius:4px;background:#34343f;transition:background .3s}.dots i.on{background:var(--red)}
.onb-body{flex:1;display:grid;place-items:center;padding:16px}
.step{width:min(620px,100%);animation:rise .35s ease}
.step h1{font-size:clamp(28px,4.5vw,44px);margin:0 0 8px;letter-spacing:-.02em;line-height:1.1}
.step .lead{color:var(--mute);font-size:17px;margin:0 0 28px}
.field{display:block;margin-bottom:20px}
.field>span{display:block;font-size:13px;color:var(--mute);margin-bottom:8px;font-weight:600;letter-spacing:.04em;text-transform:uppercase}
.input{width:100%;padding:15px 16px;border-radius:12px;background:var(--card);border:1px solid var(--line);font-size:17px;outline:none}
.input:focus{border-color:#fff}
.avatars{display:grid;grid-template-columns:repeat(auto-fill,minmax(56px,1fr));gap:10px}
.avatars button{aspect-ratio:1;border-radius:12px;font-size:28px;background:var(--card);border:2px solid transparent;transition:transform .12s}
.avatars button.on{border-color:#fff;transform:scale(1.06)}
.swatches{display:flex;flex-wrap:wrap;gap:10px}
.swatches button{width:38px;height:38px;border-radius:50%;border:3px solid transparent}
.swatches button.on{border-color:#fff}
.preview{display:flex;align-items:center;gap:16px;margin:4px 0 26px}
.preview .av{width:76px;height:76px;border-radius:14px;display:grid;place-items:center;font-size:40px;box-shadow:var(--shadow)}
.choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.choice{text-align:left;padding:18px;border-radius:14px;background:var(--card);border:2px solid var(--line);transition:border-color .15s,transform .12s}
.choice:hover{transform:translateY(-2px)}
.choice.on{border-color:var(--red);background:#22121a}
.choice b{display:block;font-size:17px;margin-bottom:4px}.choice small{color:var(--mute)}
.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px;border-radius:14px;background:var(--card);border:1px solid var(--line);margin-bottom:12px;text-align:left}
.toggle-row small{color:var(--mute);display:block}
.switch{position:relative;width:52px;height:30px;flex:none}
.switch input{opacity:0;width:0;height:0}
.switch i{position:absolute;inset:0;border-radius:30px;background:#3a3a45;transition:.2s}
.switch i:before{content:"";position:absolute;width:24px;height:24px;left:3px;top:3px;border-radius:50%;background:#fff;transition:.2s}
.switch input:checked+i{background:var(--red)}.switch input:checked+i:before{transform:translateX(22px)}
.onb-nav{display:flex;justify-content:space-between;gap:12px;margin-top:30px}
.welcome{position:fixed;inset:0;display:grid;place-items:center;background:var(--bg);z-index:60;animation:fade .3s}
.welcome .av{width:120px;height:120px;border-radius:22px;display:grid;place-items:center;font-size:64px;margin:0 auto 22px;animation:pop .6s cubic-bezier(.2,1.4,.4,1)}
.welcome h1{font-size:40px;margin:0;text-align:center;animation:rise .5s .2s both}
.welcome p{color:var(--mute);text-align:center;animation:rise .5s .35s both}
@keyframes pop{from{transform:scale(.3);opacity:0}}

/* ---------- app shell ---------- */
.nav{position:fixed;top:0;left:0;right:0;height:64px;display:flex;align-items:center;gap:28px;padding:0 clamp(16px,4vw,48px);z-index:30;transition:background .3s;background:linear-gradient(#000c,transparent)}
.nav.solid{background:rgba(11,11,15,.96);box-shadow:0 1px 0 var(--line)}
.nav .links{display:flex;gap:22px}
.nav .links a{color:#d0d0d8;font-size:14px;font-weight:500}.nav .links a.on{color:#fff;font-weight:700}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:14px}
.me{display:flex;align-items:center;gap:8px;position:relative}
.me .av{width:34px;height:34px;border-radius:8px;display:grid;place-items:center;font-size:19px}
.menu{position:absolute;right:0;top:46px;background:rgba(15,15,20,.98);border:1px solid var(--line);border-radius:12px;min-width:220px;padding:8px;box-shadow:var(--shadow);animation:fade .15s}
.menu a,.menu button{display:flex;align-items:center;gap:10px;width:100%;padding:10px 12px;border-radius:8px;text-align:left;font-size:14px}
.menu a:hover,.menu button:hover{background:var(--card2)}
.menu .av{width:28px;height:28px;border-radius:6px;font-size:16px}
.menu hr{border:0;border-top:1px solid var(--line);margin:6px 0}
main.page{padding:84px clamp(16px,4vw,48px) calc(90px + var(--safe-b));max-width:1500px;margin:0 auto;animation:fade .25s}
.tabbar{display:none}

/* ---------- hero ---------- */
.hero{position:relative;margin:-84px calc(-1 * clamp(16px,4vw,48px)) 26px;padding:130px clamp(16px,4vw,48px) 54px;overflow:hidden;
  background:radial-gradient(800px 400px at 85% 20%,rgba(229,9,20,.35),transparent 70%),radial-gradient(700px 400px at 10% 90%,rgba(31,128,224,.25),transparent 70%),linear-gradient(180deg,#15151c,var(--bg))}
.hero:after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:22px 22px;mask:linear-gradient(transparent,#000 30%,#000 70%,transparent);pointer-events:none}
.hero>*{position:relative;z-index:1}
.hero .kicker{display:inline-flex;gap:8px;align-items:center;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#ffb3b8}
.hero h1{font-size:clamp(34px,6vw,68px);line-height:1.02;margin:12px 0 14px;letter-spacing:-.03em;max-width:820px;font-weight:900}
.hero p{color:#c9c9d3;font-size:18px;max-width:620px;margin:0 0 26px}
.searchbox{position:relative;max-width:640px}
.searchbox input{width:100%;padding:18px 20px 18px 54px;font-size:18px;border-radius:14px;border:1px solid #3a3a46;background:rgba(20,20,26,.85);outline:none;backdrop-filter:blur(10px)}
.searchbox input:focus{border-color:#fff}
.searchbox .mag{position:absolute;z-index:1;pointer-events:none;left:20px;top:50%;transform:translateY(-50%);opacity:.7}
.suggest{position:absolute;left:0;right:0;top:calc(100% + 6px);background:#16161d;border:1px solid var(--line);border-radius:12px;overflow:hidden;z-index:20;box-shadow:var(--shadow)}
.suggest button{display:flex;justify-content:space-between;width:100%;padding:12px 16px;text-align:left;gap:12px}
.suggest button:hover,.suggest button.act{background:var(--card2)}
.suggest small{color:var(--mute)}
.hero .stats{display:flex;gap:26px;margin-top:28px;flex-wrap:wrap}
.hero .stats div b{display:block;font-size:26px;font-weight:800}.hero .stats div{color:var(--mute);font-size:13px}

/* ---------- rows ---------- */
.row{margin:0 0 30px}
.row-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:12px;gap:12px}
.row-head h2{font-size:20px;margin:0;font-weight:700}
.row-head a{color:var(--mute);font-size:13px;font-weight:600}.row-head a:hover{color:#fff}
.rail{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 2px 14px;scrollbar-width:none}
.rail::-webkit-scrollbar{display:none}
.rail>*{scroll-snap-align:start;flex:none}
.tile{width:210px;height:118px;border-radius:12px;padding:14px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 14px rgba(0,0,0,.35)}
.tile:hover{transform:scale(1.05);z-index:2;box-shadow:var(--shadow)}
.tile.QA{background:var(--qa)}.tile.LRDI{background:var(--lrdi)}.tile.VARC{background:var(--varc)}
.tile.zero{filter:grayscale(.85) brightness(.55)}
.tile b{font-size:16px;line-height:1.2;font-weight:800;text-shadow:0 1px 8px rgba(0,0,0,.35)}
.tile .n{font-size:13px;font-weight:600;opacity:.92}
.tile .big{position:absolute;right:-6px;bottom:-22px;font-size:84px;font-weight:900;opacity:.14;letter-spacing:-.05em}
.poster{width:170px;height:240px;border-radius:12px;padding:16px;display:flex;flex-direction:column;justify-content:flex-end;position:relative;overflow:hidden;background:linear-gradient(160deg,#2b2b36,#121217);border:1px solid var(--line);transition:transform .2s}
.poster:hover{transform:scale(1.04)}
.poster .yr{position:absolute;top:10px;left:14px;font-size:64px;font-weight:900;letter-spacing:-.06em;opacity:.12;line-height:1}
.poster b{font-size:19px;line-height:1.15}.poster small{color:var(--mute)}
.poster .bar{display:flex;height:4px;border-radius:4px;overflow:hidden;margin-top:10px;gap:2px}
.poster .bar i:nth-child(1){background:#e50914}.poster .bar i:nth-child(2){background:#8b5cf6}.poster .bar i:nth-child(3){background:#1f80e0}

/* ---------- question cards ---------- */
.qgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.qcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .18s,border-color .18s,box-shadow .18s}
.qcard:hover{transform:translateY(-3px);border-color:#44444f;box-shadow:var(--shadow)}
.qcard .thumb{height:150px;background:#fff;overflow:hidden;position:relative}
.qcard .thumb img{width:100%;object-fit:cover;object-position:top}
.qcard .thumb:after{content:"";position:absolute;inset:auto 0 0 0;height:40px;background:linear-gradient(transparent,rgba(27,27,34,.35))}
.rail .qcard{width:300px}
.qcard .body{padding:12px 14px 14px;display:flex;flex-direction:column;gap:8px;flex:1}
.qcard .meta{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--mute)}
.qcard .meta b{color:var(--ink)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:12px;padding:3px 9px;border-radius:999px;background:var(--card2);border:1px solid var(--line);color:#d8d8e0;font-weight:500}
.chip.QA{background:#0f2b4d;border-color:#1c4a80}.chip.LRDI{background:#2a1a4d;border-color:#4b2f85}.chip.VARC{background:#3d0f14;border-color:#6b1a22}
.badge{font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;padding:3px 8px;border-radius:6px}
.badge.correct{background:#12391f;color:#5ee394}.badge.partially_correct{background:#3d2e0a;color:#f5c451}
.badge.incorrect,.badge.unreadable{background:#40121a;color:#ff7a85}.badge.incomplete{background:#2c2c36;color:#c9c9d3}
.badge.new{background:var(--red);color:#fff}

/* ---------- library ---------- */
.drop{display:block;border:2px dashed #3d3d49;border-radius:18px;padding:34px 20px;text-align:center;background:rgba(255,255,255,.02);transition:border-color .2s,background .2s;cursor:pointer}
.drop.over,.drop:hover{border-color:var(--red);background:rgba(229,9,20,.06)}
.drop b{font-size:19px;display:block;margin:8px 0 4px}.drop small{color:var(--mute)}
.plist{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin-top:18px}
.pcard{background:var(--card);border:2px solid var(--line);border-radius:var(--r);padding:16px;display:flex;flex-direction:column;gap:10px;position:relative;transition:border-color .15s}
.pcard.sel{border-color:var(--red)}
.pcard .top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.pcard b{font-size:17px}.pcard small{color:var(--mute);word-break:break-word}
.status{font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px;display:inline-flex;align-items:center;gap:6px}
.status.ready{background:#12391f;color:#5ee394}.status.failed{background:#40121a;color:#ff7a85}
.status.queued,.status.extracting,.status.classifying{background:#1d2a44;color:#8fbfff}
.spin{width:12px;height:12px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:rot .8s linear infinite;display:inline-block}
@keyframes rot{to{transform:rotate(360deg)}}
.check{width:24px;height:24px;border-radius:7px;border:2px solid #555;display:grid;place-items:center;flex:none}
.pcard.sel .check{background:var(--red);border-color:var(--red)}
.sticky-bar{position:sticky;bottom:calc(16px + var(--safe-b));margin-top:18px;background:rgba(22,22,29,.96);border:1px solid var(--line);border-radius:14px;padding:12px 14px;display:flex;align-items:center;gap:12px;justify-content:space-between;box-shadow:var(--shadow);backdrop-filter:blur(10px);z-index:10}

/* ---------- search ---------- */
.pbar{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none;margin:14px 0}
.pbar::-webkit-scrollbar{display:none}
.pchip{flex:none;padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);font-size:13px;font-weight:600;color:var(--mute)}
.pchip.on{background:#fff;color:#000;border-color:#fff}
.tabs{display:flex;gap:6px;margin:10px 0 18px;flex-wrap:wrap}
.tabs button{padding:8px 16px;border-radius:10px;font-weight:600;color:var(--mute);background:var(--card);border:1px solid var(--line)}
.tabs button.on{color:#fff;background:var(--card2);border-color:#fff}
.result-head{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;margin:6px 0 16px}
.result-head h1{margin:0;font-size:clamp(24px,3.5vw,34px);letter-spacing:-.02em}
.result-head span{color:var(--mute)}
.empty{padding:50px 20px;text-align:center;color:var(--mute);border:1px dashed var(--line);border-radius:16px}
.empty b{display:block;color:var(--ink);font-size:18px;margin-bottom:6px}
.group-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px}
.group-grid .tile{width:auto}

/* ---------- question page ---------- */
.qtop{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.qtop h1{font-size:22px;margin:0}
.qtop .sp{flex:1}
.qlayout{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:22px;align-items:start}
.sheet{background:#fff;border-radius:var(--r);padding:12px;color:#000}
.sheet img{margin:0 auto}
.sheet+.sheet{margin-top:12px}
details.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r);margin-bottom:14px}
details.panel>summary{list-style:none;cursor:pointer;padding:14px 16px;font-weight:700;display:flex;justify-content:space-between;align-items:center}
details.panel>summary::-webkit-details-marker{display:none}
details.panel>summary:after{content:"▾";color:var(--mute);transition:transform .2s}
details.panel[open]>summary:after{transform:rotate(180deg)}
details.panel>.inner{padding:0 12px 12px}
.side{position:sticky;top:80px;display:flex;flex-direction:column;gap:14px}
.box{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.box h3{margin:0 0 10px;font-size:15px;display:flex;align-items:center;gap:8px}
.box .sub{color:var(--mute);font-size:13px;margin:-4px 0 12px}
.answer-reveal{display:flex;align-items:center;justify-content:space-between;gap:12px}
.answer-reveal .val{font-size:26px;font-weight:900;letter-spacing:.02em}
.blur{filter:blur(9px);user-select:none}
.shots{display:grid;grid-template-columns:repeat(auto-fill,minmax(72px,1fr));gap:8px;margin:10px 0}
.shots div{position:relative;aspect-ratio:3/4;border-radius:8px;overflow:hidden;background:#000}
.shots img{width:100%;height:100%;object-fit:cover}
.shots button{position:absolute;top:4px;right:4px;width:22px;height:22px;border-radius:50%;background:rgba(0,0,0,.7);font-size:12px}
.cam-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}
textarea.input{resize:vertical;min-height:70px;font-size:15px}
.thinking{display:flex;gap:12px;align-items:center;padding:14px;border-radius:12px;background:linear-gradient(90deg,#1a1a22,#23232d,#1a1a22);background-size:200% 100%;animation:sheen 1.6s linear infinite;color:var(--mute);font-size:14px}
@keyframes sheen{to{background-position:-200% 0}}
.eval{animation:rise .35s}
.eval-top{display:flex;align-items:center;gap:16px;margin-bottom:14px}
.ring{--p:0;width:74px;height:74px;border-radius:50%;flex:none;display:grid;place-items:center;background:conic-gradient(var(--c,#2fbf71) calc(var(--p)*1%),#2e2e39 0)}
.ring span{width:60px;height:60px;border-radius:50%;background:var(--card);display:grid;place-items:center;font-weight:900;font-size:20px}
.ring span small{font-size:11px;color:var(--mute);font-weight:600;margin-left:1px}
.kv{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:14px}.kv span{color:var(--mute)}
.steps{list-style:none;padding:0;margin:10px 0;display:flex;flex-direction:column;gap:8px}
.steps li{display:grid;grid-template-columns:22px 1fr;gap:10px;font-size:14px}
.steps li i{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-style:normal;font-size:12px;font-weight:800}
.steps .ok i{background:#12391f;color:#5ee394}.steps .error i{background:#40121a;color:#ff7a85}.steps .skipped i{background:#2c2c36;color:#c9c9d3}
.steps small{color:var(--mute);display:block}
.callout{border-left:3px solid var(--amber);background:#221c0f;padding:10px 12px;border-radius:0 10px 10px 0;margin-top:10px;font-size:14px}
.callout.blue{border-color:var(--blue);background:#0f1a2b}
.callout.red{border-color:var(--red);background:#2a1014}
.md{font-size:14.5px;line-height:1.6;overflow-wrap:anywhere}
.md p{margin:.4em 0}.md ul,.md ol{margin:.4em 0;padding-left:1.3em}.md code{background:#2a2a34;padding:1px 5px;border-radius:5px}
.md .katex-display{overflow-x:auto;overflow-y:hidden;padding:4px 0}
.chat{display:flex;flex-direction:column;gap:10px;margin:12px 0}
.msg{max-width:92%;padding:10px 13px;border-radius:14px;font-size:14.5px}
.msg.user{align-self:flex-end;background:#2b1216;border:1px solid #4a1c22;border-bottom-right-radius:4px}
.msg.assistant{align-self:flex-start;background:var(--card2);border:1px solid var(--line);border-bottom-left-radius:4px}
.msg .imgs{display:flex;gap:6px;margin-top:6px;flex-wrap:wrap}.msg .imgs img{width:70px;height:90px;object-fit:cover;border-radius:6px}
.composer{display:flex;gap:8px;align-items:flex-end}
.composer textarea{flex:1;min-height:44px;max-height:160px;padding:11px 12px;border-radius:12px;background:var(--bg2);border:1px solid var(--line);outline:none;resize:none}
.composer textarea:focus{border-color:#fff}
.tricks .appr{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:12px;margin:10px 0}
.tricks .appr h4{margin:0 0 4px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:4px 12px;font-size:15px}
.tricks .appr h4 span{flex:1 1 220px}
.tricks .appr h4 small{color:var(--amber);font-weight:700}
.tricks ol{padding-left:1.2em;margin:.4em 0}
.src{display:flex;flex-direction:column;gap:6px;margin-top:8px}
.src a{font-size:13px;color:#8fbfff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hist{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}
.hist button{flex:none;padding:6px 10px;border-radius:8px;border:1px solid var(--line);background:var(--bg2);font-size:12px;color:var(--mute)}
.hist button.on{border-color:#fff;color:#fff}

#toast{position:fixed;left:50%;bottom:calc(24px + var(--safe-b));transform:translateX(-50%) translateY(120px);background:#fff;color:#000;padding:12px 18px;border-radius:12px;font-weight:600;z-index:99;transition:transform .3s;max-width:calc(100vw - 32px);box-shadow:var(--shadow)}
#toast:not(.show){visibility:hidden;transition:transform .3s,visibility 0s .3s}
#toast.show{transform:translateX(-50%) translateY(0)}
#toast.err{background:#ff5a66;color:#fff}

@media (max-width:980px){
  .qlayout{grid-template-columns:1fr;gap:14px}
  .qmain{display:contents}            /* let question, side panel and AI output interleave */
  .qmain>*{order:1}.side{order:2;position:static}.qmain>.late{order:3}
  .qmain>*,.side{margin:0!important}
}
@media (max-width:720px){
  .nav{gap:14px;height:56px}
  .nav .links{display:none}
  .tabbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;background:rgba(11,11,15,.97);border-top:1px solid var(--line);padding:6px 6px calc(6px + var(--safe-b))}
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;color:var(--mute);padding:6px 0}
  .tabbar a.on{color:#fff}.tabbar a span{font-size:20px;line-height:1}
  main.page{padding-top:72px}
  .hero{margin-top:-72px;padding-top:100px}
  .who .brand{left:18px}
  .tile{width:170px;height:104px}
  .qgrid{grid-template-columns:1fr}
  .modal{padding:22px}
}

/* ---------- v3: stopwatch, fastest solution, handbook, chat ---------- */
.chip.target{background:#2a2410;border-color:#5a4a14;color:#f5c451}
.timer{text-align:center}
.timer .clock{font-size:46px;font-weight:900;letter-spacing:.02em;font-variant-numeric:tabular-nums;line-height:1.1}
.timer .tsub{color:var(--mute);font-size:13px;margin:2px 0 12px}
.timer .trow{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.timer.over .clock{color:#ff7a85}.timer.over .tsub{color:#ff7a85}
.fast{border-color:#3b3413;background:linear-gradient(180deg,#1e1b10,var(--card) 60%)}
.fast-head{display:flex;justify-content:space-between;align-items:center;gap:10px}.fast-head h3{margin:0}
.fast-name{font-weight:700;font-size:16px;margin-bottom:4px}
.fast-steps li{margin:4px 0}
.spoiler{filter:blur(7px);user-select:none;pointer-events:none;max-height:160px;overflow:hidden;transition:filter .3s}
.spoiler.open{filter:none;user-select:auto;pointer-events:auto;max-height:none}
details.trick{background:var(--bg2);border:1px solid var(--line);border-radius:12px;margin:8px 0}
details.trick>summary{list-style:none;cursor:pointer;padding:11px 14px;display:flex;justify-content:space-between;gap:10px;align-items:baseline}
details.trick>summary::-webkit-details-marker{display:none}
details.trick .tname{font-weight:700}
details.trick .tmeta{color:var(--amber);font-size:12px;font-weight:700;white-space:nowrap}
details.trick .tbody{padding:0 14px 12px}
details.trick .when{color:var(--mute);margin-top:0}
details.trick .ex{background:#12161f;border-radius:8px;padding:8px 10px;margin-top:8px;font-size:14px}
.handbook h3{margin-bottom:4px}
.trick-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:14px;align-items:start}
.tcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px}
.tcard details.trick{margin:0;background:transparent;border:0}
.tcard details.trick>summary{padding:4px 2px 8px}.tcard details.trick .tbody{padding:0 2px 4px}

.chatbox{display:flex;flex-direction:column;gap:10px}
.chat-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.chat-head h3{margin:0 0 2px}
.thread{display:flex;flex-direction:column;gap:14px;max-height:540px;overflow-y:auto;padding:4px 2px;scroll-behavior:smooth}
.chat-empty{color:var(--mute);text-align:center;padding:26px 16px;border:1px dashed var(--line);border-radius:12px;font-size:14px}
.msg{display:flex;gap:10px;align-items:flex-start;max-width:100%;padding:0;background:none;border:0;border-radius:0}
.msg.user{flex-direction:row-reverse;align-self:stretch}
.msg.assistant{align-self:stretch}
.msg .mwho{flex:none}
.mav{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;font-size:16px}
.mav.ai{background:linear-gradient(135deg,#e50914,#8b5cf6);color:#fff;font-size:15px}
.bub{max-width:min(620px,85%);padding:10px 13px;border-radius:14px;font-size:14.5px}
.msg.user .bub{background:#2b1216;border:1px solid #4a1c22;border-top-right-radius:4px}
.msg.assistant .bub{background:var(--card2);border:1px solid var(--line);border-top-left-radius:4px}
.msg.err .bub{background:#2a1014;border-color:#6b1a22;color:#ffb3b8}
.mfoot{display:flex;gap:10px;align-items:center;margin-top:6px;font-size:11px;color:var(--dim)}
.mfoot .copy{font-size:11px;color:var(--mute);padding:2px 8px;border-radius:6px;border:1px solid var(--line)}
.mfoot .copy:hover{color:#fff;border-color:#fff}
.msg .imgs{display:flex;gap:6px;margin-top:6px;flex-wrap:wrap}.msg .imgs img{width:72px;height:92px;object-fit:cover;border-radius:6px}
.typing{display:flex;gap:5px;align-items:center;padding:14px 16px}
.typing i{width:7px;height:7px;border-radius:50%;background:var(--mute);animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
.suggest-row{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
.suggest-row::-webkit-scrollbar{display:none}
.sugg{flex:none;font-size:13px;padding:7px 12px;border-radius:999px;border:1px solid var(--line);background:var(--bg2);color:#d8d8e0}
.sugg:hover{border-color:#fff;color:#fff}
.attach-row{display:flex;gap:8px}.attach-row:empty{display:none}
.attach-row div{position:relative;width:56px;height:70px;border-radius:8px;overflow:hidden}
.attach-row img{width:100%;height:100%;object-fit:cover}
.attach-row button{position:absolute;top:2px;right:2px;width:20px;height:20px;border-radius:50%;background:rgba(0,0,0,.7);font-size:11px}
.composer{background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:6px;align-items:flex-end}
.composer:focus-within{border-color:#fff}
.composer textarea{border:0;background:transparent;padding:9px 6px;min-height:40px}
.composer textarea:focus{border:0}
.composer .icon-btn{width:38px;height:38px;flex:none}
@media (max-width:720px){.bub{max-width:88%}.trick-grid{grid-template-columns:1fr}.thread{max-height:none}}
/* v3 chat rows: neutralise the v1 bubble styles that targeted .msg.user/.msg.assistant directly */
.thread .msg.user,.thread .msg.assistant{background:none;border:0;padding:0;max-width:100%;border-radius:0}
.qlayout>*,.qmain>*,.side>*{min-width:0}

/* ---------- v4: progress, memory, conversation events ---------- */
.mark-q{font-size:12px;color:var(--mute);font-weight:700;letter-spacing:.04em;text-transform:uppercase;margin:12px 0 6px}
.mark-row{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.mk.ok{border-color:#1f6b40}.mk.mid{border-color:#6b5414}.mk.bad{border-color:#6b1a22}
.hist-list .hrow{display:flex;gap:6px;align-items:baseline;font-size:13px;padding:3px 0}
.hist-list .hrow small{margin-left:auto;color:var(--dim)}
.hrow.correct b{color:#5ee394}.hrow.partial b{color:#f5c451}.hrow.wrong b{color:#ff7a85}
.evrow{display:flex;align-items:center;gap:10px;justify-content:center;flex-wrap:wrap}
.evrow small{color:var(--dim);font-size:11px}
.evchip{font-size:12px;font-weight:700;padding:5px 11px;border-radius:999px;border:1px solid var(--line);background:var(--bg2);color:#d8d8e0}
button.evchip:hover{border-color:#fff}
.evchip.correct{background:#12391f;color:#5ee394;border-color:#1f6b40}
.evchip.partially_correct,.evchip.partial,.evchip.incomplete{background:#3d2e0a;color:#f5c451;border-color:#6b5414}
.evchip.incorrect,.evchip.wrong,.evchip.unreadable{background:#40121a;color:#ff7a85;border-color:#6b1a22}
.remembered{margin-top:8px;font-size:12px;color:#c4b5fd;background:#1d1733;border:1px solid #3b2d6b;border-radius:8px;padding:6px 9px}
.remembered a{color:#c4b5fd;text-decoration:underline}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:18px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.stat b{display:block;font-size:32px;font-weight:900;letter-spacing:-.02em}.stat span{color:var(--mute);font-size:13px}
.days{display:grid;grid-template-columns:repeat(30,1fr);gap:3px;height:60px;align-items:end;margin:6px 0 16px}
.days i{display:block;height:max(4px,var(--h));background:#2a2a34;border-radius:3px}.days i.on{background:var(--red)}
.sec-bars{display:grid;gap:8px}
.sec-bars>div{display:grid;grid-template-columns:70px 1fr 90px;gap:10px;align-items:center;font-size:13px}
.sec-bars .bar{height:8px;border-radius:8px;background:#2a2a34;overflow:hidden}.sec-bars .bar i{display:block;height:100%;background:var(--green)}
.sec-bars b{text-align:right;font-weight:600;color:var(--mute)}
.tile.weak{outline:2px solid rgba(255,122,133,.5);outline-offset:-2px}
.prog-cols{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:16px;align-items:start}
.mgroup{margin-bottom:12px}.mg{font-size:12px;color:var(--mute);font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin:6px 0}
.mrow{display:grid;grid-template-columns:12px 1fr 48px 44px 92px;gap:8px;align-items:center;padding:7px 6px;border-radius:8px;font-size:14px}
.mrow:hover{background:var(--card2)}
.mrow .mc,.mrow .ma{color:var(--mute);font-size:12px;text-align:right}
.dot{width:10px;height:10px;border-radius:50%;background:#3a3a45}.dot.strong{background:var(--green)}.dot.learning{background:var(--amber)}.dot.weak{background:#ff5a66}
.ms{font-size:11px;font-weight:700;text-align:right;color:var(--dim)}.ms.strong{color:#5ee394}.ms.learning{color:#f5c451}.ms.weak{color:#ff7a85}
.note{display:grid;grid-template-columns:1fr auto;gap:2px 10px;padding:9px 10px;border:1px solid var(--line);border-radius:10px;margin-bottom:8px;background:var(--bg2);font-size:14px}
.note small{color:var(--dim);font-size:11px;grid-column:1}.note button{grid-row:1/3;grid-column:2;width:26px;height:26px;border-radius:50%;background:var(--card2);font-size:12px}
.mem-add{display:flex;gap:8px;margin-top:10px}.mem-add .input{padding:10px 12px;font-size:14px}
.act{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;padding:8px 4px;border-bottom:1px solid var(--line)}
.act:last-child{border-bottom:0}.act small{color:var(--mute);font-size:12px;display:block}
@media (max-width:900px){.prog-cols{grid-template-columns:1fr}.mrow{grid-template-columns:12px 1fr 40px 40px 80px}}