:root{--primary:#17171c;--black:#000;--ink:#212121;--deep-green:#003c33;--canvas:#fff;--stone:#eeece7;--pale-green:#edfce9;--hairline:#d9d9dd;--border-light:#e5e7eb;--muted:#93939f;--slate:#75758a;--body-muted:#616161;--blue:#1863dc;--coral:#ff7759;--coral-soft:#ffad9b;--error:#b30000;--green-ok:#1f8a5b;--form-focus:#9b60aa;--r-sm:8px;--r-md:16px;--r-lg:22px;--r-pill:32px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--canvas);color:var(--ink);-webkit-font-smoothing:antialiased;font-family:Inter,Arial,ui-sans-serif,system-ui;font-size:16px;line-height:1.5}.mono{letter-spacing:.28px;text-transform:uppercase;color:var(--slate);font-family:Space Mono,Roboto Mono,ui-monospace,monospace;font-size:13px}.coral{color:var(--coral)}.wrap{max-width:760px;margin:0 auto;padding:0 20px}.wrap-wide{max-width:1080px;margin:0 auto;padding:0 20px}.bar{background:var(--black);color:#fff;letter-spacing:.2px;justify-content:center;align-items:center;gap:10px;height:36px;font-size:12px;display:flex}.bar .dot{background:var(--muted);border-radius:50%;width:7px;height:7px}.bar .dot.live{background:var(--green-ok)}.btn{cursor:pointer;border-radius:var(--r-pill);background:var(--primary);color:#fff;border:none;padding:12px 26px;font:500 14px/1.71 inherit;transition:transform 80ms,opacity .15s}.btn:hover{opacity:.9}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-ghost{color:var(--ink);border:1px solid var(--hairline);background:0 0}.btn-light{color:var(--primary);background:#fff}.btn-block{width:100%}#gate{background:var(--deep-green);color:#fff;justify-content:center;align-items:center;min-height:calc(100vh - 36px);padding:40px 20px;display:flex}.gate-card{width:100%;max-width:440px}.gate-card h1{letter-spacing:-1.2px;margin:14px 0 18px;font-size:54px;font-weight:400;line-height:1}.gate-card p.lead{color:#ffffffbf;margin-bottom:34px;font-size:17px}.pin-label{color:#fff9;letter-spacing:.28px;text-transform:uppercase;margin-bottom:8px;font-family:Space Mono,monospace;font-size:13px;display:block}.pin-input{color:#fff;border-radius:var(--r-sm);letter-spacing:6px;text-align:center;background:#ffffff0f;border:1px solid #ffffff40;width:100%;padding:16px 18px;font-family:Space Mono,monospace;font-size:22px}.pin-input::placeholder{color:#ffffff4d;letter-spacing:3px}.pin-input:focus{border-color:var(--coral);outline:none}.gate-err{color:var(--coral-soft);min-height:20px;margin-top:12px;font-size:14px}.gate-hint{color:#ffffff73;margin-top:28px;font-size:13px;line-height:1.6}#register{padding:64px 0}#register h2{letter-spacing:-.6px;margin:10px 0 8px;font-size:40px;font-weight:400;line-height:1.05}#register .sub{color:var(--body-muted);margin-bottom:40px;font-size:17px}.field{margin-bottom:24px}.field label{letter-spacing:.28px;text-transform:uppercase;color:var(--slate);margin-bottom:10px;font-family:Space Mono,monospace;font-size:13px;display:block}.text-input{border:1px solid var(--hairline);border-radius:var(--r-sm);width:100%;color:var(--ink);background:#fff;padding:14px 16px;font-family:inherit;font-size:16px}.text-input:focus{border-color:var(--form-focus);outline:none;box-shadow:0 0 0 3px #9b60aa1f}.role-row{gap:12px;display:flex}.role-opt{border:1px solid var(--hairline);border-radius:var(--r-sm);cursor:pointer;text-align:center;flex:1;padding:18px;transition:all .12s}.role-opt:hover{border-color:var(--primary)}.role-opt.sel{border-color:var(--primary);background:var(--stone)}.role-opt .ro-t{margin-bottom:4px;font-size:18px}.role-opt .ro-d{color:var(--body-muted);font-size:13px}#quiz{padding:40px 0 80px}.q-top{justify-content:space-between;align-items:center;margin-bottom:18px;display:flex}.progress-track{background:var(--border-light);border-radius:99px;height:4px;margin-bottom:34px;overflow:hidden}.progress-fill{background:var(--deep-green);height:100%;transition:width .3s}.q-type{border:1px solid var(--hairline);border-radius:var(--r-pill);letter-spacing:.28px;text-transform:uppercase;color:var(--slate);margin-bottom:18px;padding:5px 14px;font-family:Space Mono,monospace;font-size:12px;display:inline-block}.q-text{letter-spacing:-.4px;margin-bottom:8px;font-size:28px;font-weight:400;line-height:1.25}.q-scenario{background:var(--stone);border-radius:var(--r-sm);color:var(--ink);margin:16px 0 24px;padding:16px 18px;font-size:15px;font-style:italic}.q-hint-multi{color:var(--coral);letter-spacing:.2px;margin-bottom:18px;font-family:Space Mono,monospace;font-size:13px}.opts{flex-direction:column;gap:12px;margin-bottom:28px;display:flex}.opt{border:1px solid var(--hairline);border-radius:var(--r-sm);cursor:pointer;background:#fff;align-items:center;gap:14px;padding:16px 18px;font-size:16px;transition:all .12s;display:flex}.opt:hover{border-color:var(--primary)}.opt .mark{border:1.5px solid var(--hairline);width:26px;height:26px;color:var(--slate);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:600;display:flex}.opt.multi .mark{border-radius:6px}.opt.picked{border-color:var(--primary);background:var(--stone)}.opt.picked .mark{background:var(--primary);border-color:var(--primary);color:#fff}.opt.correct{border-color:var(--green-ok);background:var(--pale-green)}.opt.correct .mark{background:var(--green-ok);border-color:var(--green-ok);color:#fff}.opt.wrong{border-color:var(--error);background:#fdeeee}.opt.wrong .mark{background:var(--error);border-color:var(--error);color:#fff}.opt.locked{cursor:default;pointer-events:none}.feedback{border-radius:var(--r-sm);margin-bottom:26px;padding:18px 20px;font-size:15px;line-height:1.55}.feedback.ok{background:var(--pale-green);border-left:3px solid var(--green-ok)}.feedback.no{border-left:3px solid var(--error);background:#fdeeee}.feedback.partial{background:#fff7ed;border-left:3px solid #d98a1f}.feedback .fb-head{margin-bottom:6px;font-size:15px;font-weight:600}.feedback.ok .fb-head{color:var(--green-ok)}.feedback.no .fb-head{color:var(--error)}.feedback.partial .fb-head{color:#b9710f}.fb-score{opacity:.85;font-family:Space Mono,monospace;font-size:13px;font-weight:400}.ic.partial{background:#d98a1f}.q-actions{gap:12px;display:flex}#result{text-align:center;padding:64px 0}.score-big{letter-spacing:-2px;margin:18px 0 4px;font-size:96px;font-weight:400;line-height:1}.score-sub{color:var(--body-muted);margin-bottom:8px;font-size:18px}.grade-chip{border-radius:var(--r-pill);color:#fff;margin-bottom:14px;padding:8px 22px;font-size:15px;display:inline-block}.save-state{color:var(--muted);min-height:18px;margin-bottom:30px;font-family:Space Mono,monospace;font-size:13px}.result-list{text-align:left;border-top:1px solid var(--hairline);margin-bottom:34px}.result-row{border-bottom:1px solid var(--hairline);align-items:flex-start;gap:14px;padding:16px 0;display:flex}.result-row .ic{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;margin-top:2px;font-size:13px;font-weight:700;display:flex}.ic.ok{background:var(--green-ok)}.ic.no{background:var(--error)}.result-row .rq{font-size:15px}.result-row .ra{color:var(--body-muted);margin-top:3px;font-size:13px}#dash{padding:40px 0 80px}.dash-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:34px;display:flex}.dash-head h2{letter-spacing:-.8px;font-size:44px;font-weight:400;line-height:1}.metrics{grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:16px;display:grid}.metric{border:1px solid var(--border-light);border-radius:var(--r-md);padding:24px}.metric .mv{letter-spacing:-1px;margin-bottom:8px;font-size:46px;font-weight:400;line-height:1}.metric .ml{color:var(--slate);text-transform:uppercase;letter-spacing:.28px;font-family:Space Mono,monospace;font-size:13px}.problem-band{background:var(--deep-green);color:#fff;border-radius:var(--r-lg);margin-bottom:40px;padding:32px}.problem-band .mono{color:var(--coral-soft)}.problem-band .pb-q{letter-spacing:-.3px;margin:12px 0 10px;font-size:24px;font-weight:400;line-height:1.3}.problem-band .pb-rate{color:#fffc;font-size:15px}.sec-title{letter-spacing:.28px;text-transform:uppercase;color:var(--slate);border-bottom:1px solid var(--hairline);margin:0 0 16px;padding-bottom:12px;font-family:Space Mono,monospace;font-size:13px}.qb-row{border-bottom:1px solid var(--hairline);padding:16px 0}.qb-top{justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:10px;display:flex}.qb-q{max-width:78%;font-size:15px}.qb-pct{white-space:nowrap;font-family:Space Mono,monospace;font-size:14px}.qb-track{background:var(--border-light);border-radius:99px;height:6px;overflow:hidden}.qb-bar{border-radius:99px;height:100%}.stu-table{border-collapse:collapse;width:100%;margin-bottom:40px}.stu-row{border-bottom:1px solid var(--hairline);cursor:pointer}.stu-row:hover{background:var(--stone)}.stu-row td{padding:16px 8px;font-size:15px}.stu-row td:first-child{padding-left:0}.stu-name{font-size:16px}.stu-role{color:var(--slate);text-transform:uppercase;font-family:Space Mono,monospace;font-size:12px}.stu-score{text-align:right;font-family:Space Mono,monospace;font-size:15px}.stu-detail td{background:var(--stone);padding:18px 20px}.sd-item{align-items:flex-start;gap:10px;padding:8px 0;font-size:14px;display:flex}.sd-item .ic{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;margin-top:2px;font-size:11px;font-weight:700;display:flex}.empty{color:var(--muted);text-align:center;padding:40px 0;font-size:15px}.footer-note{text-align:center;color:var(--muted);padding:30px 0 50px;font-size:12px;line-height:1.6}.danger-link{color:var(--error);cursor:pointer;background:0 0;border:none;font-size:13px;text-decoration:underline}.banner{border:1px solid var(--coral-soft);border-radius:var(--r-sm);color:#7a3b22;background:#fff7ed;margin-bottom:24px;padding:14px 16px;font-size:13px;line-height:1.5}.banner code{background:#0000000f;border-radius:4px;padding:1px 5px;font-family:Space Mono,monospace;font-size:12px}.spin{border:2px solid var(--hairline);border-top-color:var(--primary);vertical-align:-3px;border-radius:50%;width:16px;height:16px;margin-right:8px;animation:.7s linear infinite sp;display:inline-block}@keyframes sp{to{transform:rotate(360deg)}}.diagram{border:1px solid var(--hairline);border-radius:var(--r-md);background:#fff;margin:0 0 24px;padding:16px}.diagram svg{width:100%;max-width:420px;height:auto;margin:0 auto;display:block}.diagram-legend{color:var(--body-muted);flex-wrap:wrap;justify-content:center;gap:18px;margin-top:10px;font-family:Space Mono,monospace;font-size:12px;display:flex}.diagram-legend span{align-items:center;gap:6px;display:flex}.diagram-legend i{border-radius:2px;width:14px;height:3px;display:inline-block}.diagram-legend span:last-child i{border-radius:50%;width:9px;height:9px}.level-row{flex-wrap:wrap;gap:10px;display:flex}.level-opt{border:1px solid var(--hairline);border-radius:var(--r-sm);cursor:pointer;text-align:center;flex:1;min-width:70px;padding:12px;font-size:15px;transition:all .12s}.level-opt:hover{border-color:var(--primary)}.level-opt.sel{border-color:var(--primary);background:var(--stone)}.level-count{color:var(--slate);margin-top:3px;font-family:Space Mono,monospace;font-size:11px;display:block}.match-list{flex-direction:column;gap:12px;margin-bottom:28px;display:flex}.match-row{border:1px solid var(--hairline);border-radius:var(--r-sm);background:#fff;align-items:center;gap:12px;padding:12px 14px;display:flex}.match-row.ok{border-color:var(--green-ok);background:var(--pale-green)}.match-row.no{border-color:var(--error);background:#fdeeee}.match-left{flex:0 0 38%;font-size:15px;font-weight:600}.match-select{border:1px solid var(--hairline);border-radius:var(--r-sm);color:var(--ink);cursor:pointer;background:#fff;flex:1;padding:10px 12px;font-family:inherit;font-size:14px}.match-select:focus{border-color:var(--form-focus);outline:none}.match-select:disabled{opacity:1;background:0 0;border-color:#0000;font-weight:500}.match-mark{color:var(--ink);font-weight:700}.match-row.ok .match-mark{color:var(--green-ok)}.match-row.no .match-mark{color:var(--error)}.cloze{margin-bottom:28px;font-size:18px;line-height:2.1}.cloze-select{border:1px solid var(--form-focus);color:var(--ink);cursor:pointer;background:#faf7fc;border-radius:6px;margin:0 2px;padding:4px 8px;font-family:inherit;font-size:15px}.cloze-select:focus{outline:none;box-shadow:0 0 0 3px #9b60aa26}.cloze-select.ok{border-color:var(--green-ok);background:var(--pale-green);color:#0f5b3a}.cloze-select.no{border-color:var(--error);color:#8a1a1a;background:#fdeeee}.cloze-select:disabled{opacity:1}#learn{padding:64px 0}#learn h2{letter-spacing:-.6px;margin:10px 0 8px;font-size:40px;font-weight:400;line-height:1.05}#learn .sub{color:var(--body-muted);margin-bottom:36px;font-size:17px}.learn-cards{flex-direction:column;gap:12px;display:flex}.learn-card{border:1px solid var(--hairline);border-radius:var(--r-sm);overflow:hidden}.learn-card.open{border-color:var(--primary)}.learn-head{cursor:pointer;letter-spacing:-.2px;width:100%;color:var(--ink);text-align:left;background:#fff;border:none;justify-content:space-between;align-items:center;padding:18px 20px;font:400 19px/1.2 inherit;display:flex}.learn-card.open .learn-head{background:var(--stone)}.learn-chev{color:var(--slate);font-family:Space Mono,monospace;font-size:22px}.learn-body{color:var(--ink);padding:4px 20px 22px;font-size:15px;line-height:1.6}.learn-body p{margin-bottom:10px}.learn-body ul{margin:0 0 10px 20px}.learn-body li{margin-bottom:6px}@media (width<=640px){.gate-card h1{font-size:42px}#register h2,.dash-head h2{font-size:32px}.q-text{font-size:23px}.score-big{font-size:72px}.metrics{grid-template-columns:1fr;gap:12px}.role-row{flex-direction:column}}