[hidden]{display:none!important}
:root{--bg:#FDFCF8;--ink:#23272e;--mut:#8a8f98;--accent:#6D28D9;--peach:#FFE4C7;--coral:#FF6B5B;--mint:#D9F5D0;--card:#fff;--line:#ece7dc}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Nunito,system-ui,sans-serif;padding-bottom:70px}
@media(min-width:900px){body{padding-bottom:0;padding-left:210px}}
h1{font-weight:800}.muted{color:var(--mut)}.wrap{max-width:1100px;margin:0 auto;padding:24px 16px}.wrap.narrow{max-width:640px}
.side{display:none}.bottombar{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:space-around;background:#fff;border-top:1px solid var(--line);padding:10px;font-size:1.4rem;z-index:50}.bottombar a{text-decoration:none}
@media(min-width:900px){.side{display:flex;flex-direction:column;gap:6px;position:fixed;left:0;top:0;bottom:0;width:210px;background:#fff;border-right:1px solid var(--line);padding:20px 14px}.side a{padding:8px 12px;border-radius:10px;text-decoration:none;color:var(--ink)}.side a.on,.side a:hover{background:#F1EAFE}.brand{font-weight:800;color:var(--accent)!important}.sp{flex:1}.who{font-size:.8rem;color:var(--mut);padding:4px 12px}.bottombar{display:none}}
.grid{display:grid;grid-template-columns:1fr;gap:14px}@media(min-width:900px){.grid{grid-template-columns:repeat(3,1fr)}.card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(109,40,217,.12)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;text-decoration:none;color:inherit;display:block}.card-t{font-weight:800;margin-bottom:8px}.card-d{font-size:.85rem;color:var(--mut);margin-top:8px}.badge{background:#F1EAFE;color:var(--accent);border-radius:20px;padding:2px 10px;font-size:.75rem;margin-right:6px}.badge.priv{background:#eee;color:#555}
.badge.ok{background:var(--mint);color:#2c6e2c}
.card-a{font-size:.78rem;color:var(--mut);margin-top:8px}
.form{display:flex;flex-direction:column;gap:10px}.form input,.form textarea,.form select{border:1px solid var(--line);border-radius:12px;padding:12px;font:inherit;background:#fff}.cta{background:var(--accent);color:#fff;border:none;border-radius:14px;padding:10px 18px;font-weight:700;cursor:pointer;text-decoration:none;display:inline-block}.ghost{background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 14px;cursor:pointer;color:var(--ink)}.err{background:#FDE8E8;color:#a00;padding:10px;border-radius:10px}
/* reader */
.readwrap{display:flex;gap:20px;max-width:1200px;margin:0 auto;padding:20px 16px}.paper{flex:1;max-width:760px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px 26px}
@media(min-width:1100px){.readwrap{max-width:1340px}.paper{max-width:900px;padding:34px 40px}.reader{font-size:1.16rem}}.reader{font-family:Merriweather,Georgia,serif;font-size:1.12rem;line-height:1.85}.reader .w{cursor:pointer;border-radius:6px;padding:0 1px;transition:transform .12s,background .2s}.reader .w:hover{background:#F1EAFE}.reader .w.pop{transform:scale(1.25);display:inline-block}
.w.h1{background:#FFF3C4}.w.h2{background:#FFE4C7}.w.h3{background:#FFC9A8}.w.h4{background:#FF9D7E}.w.h5{background:var(--coral);color:#fff}
.detail{display:none}
.rightcol{display:none}
@media(min-width:1100px){
  .rightcol{display:flex;flex-direction:column;gap:16px;width:330px;position:sticky;top:20px;align-self:flex-start}
  .detail{display:block}
}
.detail,.tbox{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}
.tbox h3{margin:0 0 8px;font-size:1rem}
.dictlink{display:inline-block;margin-top:10px;color:var(--accent);text-decoration:none;font-weight:700;font-size:.85rem}
.d-top{display:flex;align-items:center;justify-content:space-between}.d-word{font-weight:800;font-size:1.2rem}.iconbtn{background:#F1EAFE;border:none;border-radius:10px;padding:6px 10px;cursor:pointer}.d-sent{font-size:.9rem;color:#555;background:var(--bg);border-radius:10px;padding:10px;margin:10px 0}.d-actions{display:flex;gap:8px;flex-wrap:wrap}.d-actions button{flex:1 1 44%;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:8px;cursor:pointer;font:inherit;font-size:.82rem;font-weight:700;white-space:nowrap}.d-actions button.sel{border-color:var(--accent);background:#F1EAFE}#dNote{width:100%;margin-top:10px;border:1px solid var(--line);border-radius:10px;padding:8px;font:inherit}.d-row{display:flex;gap:8px;margin-top:10px}.hint{font-size:.75rem;color:var(--mut);margin-top:10px}
.d-state{font-size:.8rem;color:var(--accent);font-weight:700;margin-top:6px}
.tip{position:fixed;z-index:100;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 14px 10px;width:300px;box-shadow:0 12px 32px rgba(35,39,46,.18)}
.tip-x{background:none;border:none;color:var(--mut);cursor:pointer;font-size:.85rem;padding:4px 6px}
.tip-x:hover{color:var(--ink)}
.tip-icos{display:flex;gap:2px;align-items:center}
.tip-cancel{display:block;width:100%;margin-top:6px;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:8px;cursor:pointer;font:inherit;font-size:.82rem;color:var(--mut)}
.tip-cancel:hover{color:var(--ink)}
.tip-known[hidden]{display:none}
.tip-form{font-size:.78rem;color:var(--accent);margin:-4px 0 8px;line-height:1.4}
.d-form{font-size:.85rem;background:#F6F1FF;border-radius:10px;padding:8px 10px;margin-top:8px;color:#4c1d95}
.d-alts{font-size:.76rem;color:#7c6aa0;margin-top:2px}
.tip-word{display:flex;align-items:center;justify-content:space-between;font-weight:800;font-size:1.05rem;margin-bottom:8px}
.tip-word button{background:#F1EAFE;border:none;border-radius:10px;padding:5px 10px;cursor:pointer;font-size:.85rem}
.tip-actions{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.tip-actions.one{grid-template-columns:1fr}
.tip-actions button{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px 6px;cursor:pointer;font:inherit;font-size:.85rem;font-weight:700;text-align:center}
.tip-actions button:hover{border-color:var(--accent);background:#F1EAFE}
.tip-known{display:block;width:100%;margin-top:6px;background:none;border:none;color:var(--mut);cursor:pointer;font-size:.78rem;padding:6px;text-decoration:underline}
.tip-known:hover{color:var(--accent)}
.libhead{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.libhead h1{margin:0}
.card-ops{display:flex;gap:12px;margin-top:10px;font-size:.82rem}
.card-ops a{color:var(--accent);text-decoration:none}
.linkbtn{background:none;border:none;cursor:pointer;font:inherit;color:var(--mut);padding:0}
.linkbtn.danger{color:#b3261e}
.toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:#23272e;color:#fff;border-radius:24px;padding:10px 22px;font-size:.9rem;z-index:200;box-shadow:0 8px 24px rgba(0,0,0,.3)}
@media(min-width:900px){.toast{bottom:30px}}
.d-actions.col{flex-direction:column}.d-actions.col button{text-align:left;font-weight:700}
#mNote{width:100%;margin-top:8px;border:1px solid var(--line);border-radius:10px;padding:8px;font:inherit}
.landnav{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.hero{text-align:left;padding:40px 0 30px}.hero h1{font-size:2.4rem;line-height:1.15;margin:0 0 12px}.cta.big{font-size:1.05rem;padding:12px 28px}
.hero.center{text-align:center;padding:64px 0 40px}
.hero.center h1{font-size:2.8rem}
.grad-text{background:linear-gradient(90deg,#6D28D9,#C026D3);-webkit-background-clip:text;background-clip:text;color:transparent}
.loginlink{color:var(--mut);font-size:.9rem}
.sheet{display:block;position:fixed;left:0;right:0;bottom:-100%;background:#fff;border-top-left-radius:20px;border-top-right-radius:20px;padding:12px 16px 24px;transition:bottom .25s;z-index:90;box-shadow:0 -8px 30px rgba(0,0,0,.15)}.sheet.open{bottom:50px}.sheet .grab{width:44px;height:5px;background:#ddd;border-radius:3px;margin:0 auto 10px}.sheet .d-actions{margin:10px 0}.sheet .cta{width:100%;margin-top:8px}.sheet .ghost{width:100%;margin-top:8px}@media(min-width:900px){.sheet{display:none}.sheet.open{bottom:-100%}}
/* bento */
.bento{display:grid;grid-template-columns:1fr 1fr;gap:12px}.box{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px}.box.big{grid-row:span 2}.box.wide{grid-column:1/-1}.box .n{font-size:2.2rem;font-weight:800;color:var(--accent)}.box .l{color:var(--mut)}.wrow{display:flex;gap:10px;align-items:center;padding:6px 0;border-bottom:1px dashed var(--line)}
.hero-grad{background:linear-gradient(135deg,#6D28D9,#9D4EDD);color:#fff;border:none}
.hero-grad .n{color:#fff}
.hero-grad .l{color:#E9D5FF}
.hero-row{display:flex;justify-content:space-between;align-items:center}
.pring{font-size:2rem;font-weight:800;background:rgba(255,255,255,.2);border-radius:50%;width:76px;height:76px;display:flex;align-items:center;justify-content:center}
.pbar{height:10px;background:rgba(255,255,255,.25);border-radius:6px;overflow:hidden;margin:12px 0 8px}
.pbar span{display:block;height:100%;background:#fff;border-radius:6px}
.hbar{flex:1;height:10px;background:#F1EAFE;border-radius:6px;overflow:hidden}
.hbar span{display:block;height:100%;background:linear-gradient(90deg,#FBBF24,#FF6B5B);border-radius:6px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:var(--mint);color:#2c6e2c;border-radius:20px;padding:4px 14px;font-size:.85rem;font-weight:700}
.chip.lang{background:rgba(255,255,255,.2);color:#fff;margin-top:8px;display:inline-block}
.badge.lang{background:#E8EAF6;color:#3949AB}
.chips-row{display:flex;gap:8px;margin:4px 0 16px;flex-wrap:wrap}
.fchip{background:#fff;border:1px solid var(--line);border-radius:20px;padding:5px 16px;font-size:.82rem;font-weight:700;color:var(--ink);text-decoration:none}
.fchip.on{background:var(--accent);border-color:var(--accent);color:#fff}
.langbox{margin-bottom:12px}
.langsel{display:flex;gap:6px;padding:10px 2px;flex-wrap:wrap}
.langsel.center{justify-content:center;margin-top:26px}
.langsel a{font-size:.72rem;font-weight:800;color:var(--mut);text-decoration:none;border:1px solid var(--line);border-radius:8px;padding:3px 8px}
.langsel a.on{background:var(--accent);border-color:var(--accent);color:#fff}
.langform{display:flex;gap:10px;align-items:center}
.langform select{border:1px solid var(--line);border-radius:10px;padding:8px;font:inherit;background:#fff}
.langform{flex-wrap:wrap}
.ana{margin-bottom:14px}
.anabtn{background:#F3E8FF;border:1px solid #E9D5FF;color:var(--accent);border-radius:12px;padding:8px 14px;font:inherit;font-weight:800;cursor:pointer}
.ana-body{margin-top:10px;background:#FAF7FF;border:1px dashed #E9D5FF;border-radius:14px;padding:12px 14px;font-size:.95rem}
.ana-body ul{margin:8px 0 0 18px;padding:0}
.tip-info{margin:10px 0 2px;font-size:.95rem;display:flex;flex-direction:column;gap:8px;align-items:stretch}
.trtext{font-weight:800;color:var(--ink);line-height:1.4;font-size:1.05rem}
.syn{color:#4B5563;font-size:.9rem;line-height:1.4}
.ex{color:#6B7280;font-style:italic;border-left:3px solid #E9D5FF;padding:2px 0 2px 10px;line-height:1.45}
.exm{color:#9CA3AF}
.ana-re{margin-left:6px}
/* Neuro-Semantic Word Card v2 */
.neuro-box{display:flex;flex-direction:column;gap:8px;margin-top:6px}
.neuro-head{display:flex;align-items:center;justify-content:space-between;gap:6px}
.neuro-emojis{font-size:1.25rem}
.neuro-lvl{background:#FEF3C7;color:#92400E;font-weight:800;font-size:.75rem;padding:2px 8px;border-radius:12px}
.neuro-morphemes{display:flex;gap:4px;flex-wrap:wrap;margin:4px 0}
.neuro-morph-pill{background:#EEF2FF;color:#3730A3;font-weight:700;font-size:.8rem;padding:2px 6px;border-radius:6px}
.neuro-mindset{font-size:.85rem;color:#374151;line-height:1.4;background:#F9FAFB;padding:6px 8px;border-radius:8px;border-left:3px solid #6366F1}
.neuro-scene{background:#FFFBEB;border:1px solid #FDE68A;border-radius:10px;padding:8px 10px;margin:4px 0}
.neuro-scene-tag{font-weight:800;font-size:.78rem;text-transform:uppercase;color:#B45309;margin-bottom:2px}
.neuro-scene-hook{font-size:.85rem;color:#78350F;line-height:1.4}
.neuro-arsenal{background:#F0FDF4;border:1px solid #BBF7D0;border-radius:10px;padding:8px 10px}
.neuro-arsenal-title{font-weight:800;font-size:.75rem;text-transform:uppercase;color:#166534;margin-bottom:2px}
.neuro-arsenal-item{font-size:.85rem;color:#14532D;line-height:1.35}
.neuro-arsenal-upgrade{font-weight:700;color:#15803D}
.neuro-trap{background:#FEF2F2;border:1px solid #FECACA;border-radius:10px;padding:6px 8px;font-size:.82rem;color:#991B1B;line-height:1.35}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px}
.sbar{height:10px;background:#F1EAFE;border-radius:6px;overflow:hidden;margin:10px 0 6px}
.sbar span{display:block;height:100%;width:0;background:linear-gradient(90deg,#6D28D9,#9D4EDD);border-radius:6px;transition:width .3s}
.scard{margin-top:14px}
.stype{font-size:.85rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em}
.sprompt{font-size:1.7rem;font-weight:800;margin:10px 0 16px;line-height:1.3}
.sopts{display:grid;gap:10px}
.sopt{background:#fff;border:2px solid var(--line);border-radius:14px;padding:14px 16px;font:inherit;font-size:1.05rem;font-weight:700;text-align:left;cursor:pointer;transition:border-color .15s,background .15s}
.sopt:hover{border-color:var(--accent)}
.sopt.good{border-color:#22C55E;background:#F0FDF4}
.sopt.bad{border-color:#EF4444;background:#FEF2F2}
.sfeed{margin:14px 0 6px;font-weight:700;line-height:1.4}
.sdone{font-size:1.4rem;font-weight:800;margin-bottom:8px}
.studycta{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.hrow{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:6px 0}
.hsel{border:1px solid var(--line);border-radius:10px;padding:8px;font:inherit;background:#fff}
.q{margin:14px 0;padding-top:10px;border-top:1px dashed var(--line)}
.q-type{font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.04em;color:var(--mut)}
.q-text{font-weight:700;margin:4px 0 8px;line-height:1.4}
.qopt{padding:10px 12px;font-size:1rem;font-weight:600}
.q-explain{margin-top:8px;color:var(--mut);line-height:1.4}
#reader.blurred{filter:blur(7px);transition:filter .25s}
.wta{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;font:inherit;min-height:220px;resize:vertical;box-sizing:border-box}
.wt{margin-top:12px}
.wstep{margin:4px 0;line-height:1.4}
.wimproved{white-space:pre-wrap;background:#FAF7FF;border:1px dashed #E9D5FF;border-radius:12px;padding:12px;line-height:1.5;font-family:inherit}
.werr{border-left:3px solid #FCA5A5;padding:6px 10px;margin:8px 0;background:#FEF7F7;border-radius:0 10px 10px 0}
.wquote{color:#B91C1C;font-weight:700}
.wfix{color:#15803D;font-weight:700}
.crit{display:flex;gap:8px;align-items:center;margin:8px 0 2px}
.crit .cname{min-width:130px;font-weight:700}
.mat{margin-top:12px}
.mat-head{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:8px}
.matCardBox{margin-top:10px}
.rc-rule{font-weight:800;font-size:1.05rem;line-height:1.4}
.rc-block{margin:8px 0}
details.card summary{cursor:pointer;font-weight:800}

/* --- Games & Matching Tile Styles --- */
.match-tile{background:#fff;border:2px solid #E2E8F0;border-radius:14px;padding:14px 12px;font-weight:700;font-size:1rem;cursor:pointer;text-align:center;transition:all .15s;user-select:none;display:flex;align-items:center;justify-content:center;min-height:56px}
.match-tile:hover{border-color:var(--accent)}
.match-tile.selected{border-color:#7C3AED;background:#F5F3FF;box-shadow:0 0 0 3px rgba(124,58,237,0.2);transform:scale(1.02)}
.match-tile.matched{border-color:#22C55E;background:#F0FDF4;color:#15803D;opacity:0.45;pointer-events:none;transform:scale(0.97)}
.match-tile.wrong{border-color:#EF4444;background:#FEF2F2;animation:tileShake .3s ease-in-out}
@keyframes tileShake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.game-card{margin-top:14px;border:2px solid #E2E8F0;box-shadow:0 8px 24px rgba(15,23,42,0.06);background:#fff;border-radius:20px;padding:22px}
.study-header{margin-bottom:14px}
.study-title-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.study-mode-switch{display:flex;background:#F1F5F9;padding:3px;border-radius:12px;gap:2px}
.mode-btn{border:none;background:transparent;padding:6px 14px;font-weight:700;font-size:0.85rem;border-radius:10px;cursor:pointer;color:#64748B;transition:all .15s}
.mode-btn.on{background:#fff;color:#0F172A;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.study-sub-meta{display:flex;align-items:center;justify-content:space-between;margin-top:6px;font-size:0.85rem}
.neuro-study-card{margin-top:14px;border:2px solid #E2E8F0;box-shadow:0 8px 24px rgba(15,23,42,0.06);background:#fff;border-radius:20px;padding:22px;transition:all .2s}
.neuro-top-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.neuro-badges{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.neuro-vector{background:#EDE9FE;color:#5B21B6;font-weight:800;font-size:.75rem;padding:2px 8px;border-radius:12px;letter-spacing:.02em}
.neuro-front{text-align:center;padding:24px 10px 10px}
.neuro-front-word{font-size:2.2rem;font-weight:800;color:#0F172A;margin-bottom:8px;letter-spacing:-.02em}
.neuro-front-cue{color:#64748B;font-size:1.05rem;line-height:1.4;margin-bottom:20px;max-width:440px;margin-left:auto;margin-right:auto}
.neuro-front-scene{margin:14px auto 20px;max-width:440px;text-align:left}
.neuro-reveal-btn{font-size:1.1rem;padding:14px 28px;border-radius:14px;font-weight:800;background:linear-gradient(135deg,#4F46E5,#7C3AED);color:#fff;border:none;cursor:pointer;box-shadow:0 6px 18px rgba(79,70,229,0.3);display:inline-flex;align-items:center;gap:8px}
.neuro-reveal-btn kbd{background:rgba(255,255,255,0.25);border-radius:6px;padding:2px 6px;font-size:0.75rem;font-family:inherit}
.neuro-word-header{display:flex;align-items:baseline;gap:8px;margin-bottom:4px}
.neuro-article{font-size:1.2rem;font-weight:700;color:#6366F1}
.neuro-main-word{font-size:2rem;font-weight:800;color:#0F172A;letter-spacing:-.02em}
.neuro-pos{font-size:0.85rem;color:#94A3B8;font-weight:600}
.neuro-translation-main{font-size:1.3rem;font-weight:700;color:#1E293B;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid #F1F5F9}
.neuro-blueprint-box{background:#F8FAFC;border:1px solid #E2E8F0;border-radius:14px;padding:12px 14px;margin-bottom:12px}
.neuro-scene-box{margin-bottom:12px}
.neuro-arsenal-box{background:#F0FDF4;border:1px solid #BBF7D0;border-radius:14px;padding:12px 14px;margin-bottom:12px}
.neuro-ex{font-size:0.95rem;color:#1E293B;line-height:1.45;margin-top:8px;padding-top:8px;border-top:1px dashed #FDE68A;font-style:italic}
.neuro-synonyms{font-size:0.9rem;color:#64748B;margin:8px 0 14px}
.neuro-rating-panel{margin-top:20px;padding-top:16px;border-top:2px solid #F1F5F9}
.rating-label{font-size:0.85rem;font-weight:800;text-transform:uppercase;color:#64748B;margin-bottom:10px;letter-spacing:.04em}
.rating-buttons{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.btn-grade{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10px 6px;border-radius:12px;border:2px solid transparent;background:#F8FAFC;cursor:pointer;font-family:inherit;font-weight:700;font-size:0.92rem;transition:all .15s}
.btn-grade .g-num{font-size:0.75rem;opacity:0.6;font-weight:800;margin-bottom:2px}
.btn-grade small{font-size:0.72rem;font-weight:600;opacity:0.75;margin-top:2px}
.grade-again{border-color:#FCA5A5;color:#991B1B;background:#FEF2F2}
.grade-again:hover{background:#FEE2E2}
.grade-hard{border-color:#FDE68A;color:#92400E;background:#FFFBEB}
.grade-hard:hover{background:#FEF3C7}
.grade-good{border-color:#86EFAC;color:#166534;background:#F0FDF4}
.grade-good:hover{background:#DCFCE7}
.grade-easy{border-color:#A5B4FC;color:#3730A3;background:#EEF2FF}
.grade-easy:hover{background:#E0E7FF}
.neuro-loading{display:inline-flex;align-items:center;gap:6px;color:#6366F1;font-size:0.88rem;padding:6px 0}
.spin{display:inline-block;animation:spin 1.2s infinite linear}
@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}
@media (max-width:640px){
  .rating-buttons{grid-template-columns:repeat(2,1fr)}
  .neuro-front-word{font-size:1.75rem}
  .neuro-main-word{font-size:1.6rem}
}

/* --- HUD & GAMIFICATION (B2 Readiness, Combo, Daily Boss) --- */
.hud-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 16px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}
.hud-metric {
  background: #F8FAFC;
  padding: 12px 14px;
  border-radius: 12px;
  border-left: 4px solid #3B82F6;
  border: 1px solid #E2E8F0;
  border-left-width: 4px;
}
.hud-metric.readiness { border-left-color: #10B981; }
.hud-metric.combo { border-left-color: #F59E0B; }
.hud-metric.boss { border-left-color: #EF4444; }
.hud-label {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748B;
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
}
.hud-value {
  font-size: 1.15rem;
  font-weight: 800;
  color: #0F172A;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.progress-track {
  width: 100%;
  height: 8px;
  background: #E2E8F0;
  border-radius: 99px;
  overflow: hidden;
  margin-top: 8px;
  position: relative;
}
.progress-fill {
  height: 100%;
  transition: width 0.4s ease, background-color 0.3s;
}
.threshold-marker {
  position: absolute;
  left: 60%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #0F172A;
  opacity: 0.4;
  z-index: 2;
}

/* --- NOTEBOOKLM DETECTIVE & QUESTION ENGINE --- */
.detective-card {
  background: #FFFFFF;
  border: 2px solid #E2E8F0;
  border-radius: 20px;
  padding: 22px;
  margin-top: 14px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}
.detective-deep-dive {
  background: #F0F9FF;
  border: 1px solid #BAE6FD;
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 18px;
}
.deep-dive-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  color: #0369A1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}
.deep-dive-body {
  margin-top: 10px;
  font-size: 0.9rem;
  color: #1E293B;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dd-item {
  background: #FFFFFF;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #E0F2FE;
}
.hint-toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 10px 0 16px 0;
}
.btn-hint {
  background: #FFFBEB;
  color: #B45309;
  border: 1px solid #FCD34D;
  padding: 7px 14px;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 800;
  cursor: pointer;
  transition: all .15s;
}
.btn-hint:hover:not(:disabled) {
  background: #FEF3C7;
  transform: translateY(-1px);
}
.btn-hint:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-hint.rule-btn {
  background: #F5F3FF;
  color: #6D28D9;
  border-color: #DDD6FE;
}
.btn-hint.rule-btn:hover:not(:disabled) {
  background: #EDE9FE;
}
.scaffolding-drawer {
  background: #FFFBEB;
  border-left: 4px solid #F59E0B;
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 14px;
  font-size: 0.92rem;
  color: #92400E;
  animation: fadeIn .2s ease-out;
}
.scaffolding-drawer.rule-level {
  background: #F5F3FF;
  border-left-color: #8B5CF6;
  color: #5B21B6;
}
.q-option-btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: #F8FAFC;
  color: #0F172A;
  border: 1px solid #CBD5E1;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 0.96rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  margin-bottom: 8px;
}
.q-option-btn:hover:not(:disabled) {
  border-color: #6366F1;
  background: #EEF2FF;
  transform: translateX(3px);
}
.q-option-btn.correct {
  background: #DCFCE7 !important;
  border-color: #10B981 !important;
  color: #065F46 !important;
}
.q-option-btn.wrong {
  background: #FEE2E2 !important;
  border-color: #EF4444 !important;
  color: #991B1B !important;
}
.debrief-panel {
  margin-top: 18px;
  border-top: 2px solid #F1F5F9;
  padding-top: 16px;
  animation: fadeIn .3s ease-out;
}
.evidence-box {
  background: #EFF6FF;
  border-left: 4px solid #3B82F6;
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 12px;
}
.evidence-quote {
  font-style: italic;
  color: #1E3A8A;
  margin-top: 4px;
  font-weight: 600;
}
.distractor-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}
.distractor-item {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.88rem;
}
.trap-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 6px;
  background: #FEE2E2;
  color: #991B1B;
  margin-right: 6px;
}
.cognitive-hook-box {
  background: linear-gradient(135deg, #ECFDF5, #F0FDF4);
  border: 1px solid #A7F3D0;
  padding: 12px 16px;
  border-radius: 12px;
  margin-top: 14px;
  font-size: 0.92rem;
  color: #065F46;
  font-weight: 600;
}
.rehab-box {
  background: #FFF1F2;
  border: 1px solid #FECDD3;
  border-radius: 14px;
  padding: 16px;
  margin-top: 16px;
}
.rehab-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.rehab-btn {
  background: #FFFFFF;
  color: #0F172A;
  border: 1px solid #CBD5E1;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  transition: all .15s;
}
.rehab-btn:hover {
  background: #FEE2E2;
  border-color: #F87171;
}
.rehab-btn.solved {
  background: #DCFCE7 !important;
  border-color: #10B981 !important;
  color: #065F46 !important;
}

/* --- 60-SEC B2 BLITZ --- */
.blitz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.blitz-timer {
  font-size: 1.5rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 12px;
  background: #FEF2F2;
  color: #DC2626;
  border: 1px solid #FCA5A5;
}
.blitz-timer.warning {
  animation: pulse .5s infinite alternate;
}
@keyframes pulse { from { opacity: 1; transform: scale(1); } to { opacity: 0.85; transform: scale(1.04); } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: translateY(0); } }