:root{--green:#1f6f5b;--green-light:#e9f4f0;--red:#bf3f33;--red-light:#fde9e6;--bg:#f3f6f8;--surface:#fff;--border:#dde5e9;--border-soft:#e1e8eb;--text:#161616;--text-muted:#475b63;--text-subtle:#5b6b72;--shadow:0 8px 32px #273b4417;--radius:10px}*,:before,:after{box-sizing:border-box}body{background:var(--bg);min-width:320px;min-height:100dvh;color:var(--text);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}h1,h2,p{margin-top:0}button,input{font:inherit}button{background:var(--green);border-radius:var(--radius);color:#fff;cursor:pointer;border:0;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:0 22px;font-weight:800;transition:opacity .12s,transform 80ms;display:inline-flex}button:active{transform:scale(.98)}button:disabled{cursor:not-allowed;opacity:.45}.secondary{background:var(--surface);border:1.5px solid var(--border);color:#1a2b31}.shell{grid-template-columns:minmax(0,1fr) 340px;align-items:start;gap:24px;min-height:100dvh;padding:32px;display:grid}.login-shell{align-items:center}.login-panel,.summary,.ranking,.question-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.login-panel{gap:28px;padding:36px;display:grid}.brand-strip{align-items:center;gap:16px;display:flex}.brand-strip img{object-fit:contain;width:88px;height:72px}.eyebrow{color:var(--red);letter-spacing:.06em;text-transform:uppercase;margin:0 0 8px;font-size:.78rem;font-weight:900}h1{margin-bottom:14px;font-size:clamp(1.8rem,4vw,3.8rem);line-height:1}.intro{color:var(--text-muted);max-width:680px;margin-bottom:0;font-size:1rem;line-height:1.6}.login-form{gap:12px;max-width:400px;display:grid}.login-form label{font-weight:800}.input-wrap{border:1.5px solid var(--border);border-radius:var(--radius);background:#f7fafb;align-items:center;gap:10px;min-height:52px;padding:0 14px;transition:border-color .15s;display:flex}.input-wrap:focus-within{border-color:var(--green)}.input-wrap input{color:var(--text);background:0 0;border:0;outline:0;flex:1;min-width:0;font-size:1.05rem}.ranking{align-self:start;padding:0;overflow:hidden}.ranking-toggle{color:var(--text);background:0 0;border:0;border-radius:0;justify-content:space-between;align-items:center;width:100%;min-height:0;padding:18px 20px;font-weight:700;display:flex}.ranking-toggle:active{transform:none}.ranking-title{align-items:center;gap:10px;display:flex}.ranking-title h2{margin:0;font-size:1.15rem}.ranking-badge{background:var(--green);color:#fff;border-radius:999px;padding:3px 7px;font-size:.72rem;font-weight:900;line-height:1}.ranking-chevron{color:var(--text-subtle)}.ranking>.storage-pill,.ranking>ol,.ranking>.ranking-note,.ranking>.export-button,.ranking>.empty{margin:0 20px}.storage-pill{color:var(--text-muted);background:#eff4f6;border-radius:8px;padding:5px 10px;font-size:.82rem;font-weight:700;display:inline-block;margin-bottom:14px!important}.ranking ol{gap:8px;padding:0;list-style:none;display:grid;margin:0 20px!important}.ranking li{border:1px solid var(--border-soft);background:#f7fafb;border-radius:8px;align-items:center;gap:10px;padding:10px 12px;display:flex}.rank-pos{color:var(--text-subtle);text-align:center;min-width:18px;font-size:.82rem;font-weight:900}.rank-info{flex:1;gap:2px;min-width:0;display:grid}.rank-info strong{font-size:.9rem}.rank-info span,.empty{color:var(--text-subtle);font-size:.8rem}.score{justify-items:end;gap:2px;font-size:.88rem;font-weight:900;display:grid}.score small{color:var(--red);font-size:.75rem;font-weight:700}.ranking-note{color:var(--text-subtle);align-items:center;gap:6px;font-size:.8rem;display:flex;margin-top:14px!important;margin-bottom:4px!important}.export-button{width:calc(100% - 40px);margin-top:12px!important;margin-bottom:20px!important}.save-error{color:#a43228;margin:0 0 16px;font-size:.9rem;font-weight:700}.login-notice{background:var(--green-light);border-radius:var(--radius);color:var(--green);border:1px solid #c5e3d8;margin:0;padding:12px 14px;font-size:.92rem;font-weight:600}.quiz-shell{grid-template-rows:auto auto 1fr auto;gap:16px;max-width:960px;min-height:100dvh;margin:0 auto;padding:24px 28px;display:grid}.quiz-header{justify-content:space-between;align-items:flex-start;gap:14px;display:flex}.quiz-header-left .eyebrow{margin-bottom:2px}.quiz-header-left h1{margin:0;font-size:clamp(1.6rem,5vw,4rem);line-height:1}.quiz-header-right{flex-direction:column;flex-shrink:0;align-items:flex-end;gap:8px;display:flex}.counter{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);justify-content:center;align-items:center;min-width:80px;height:52px;font-size:1.15rem;font-weight:900;display:flex}.progress-bar{background:#dbe5e8;border-radius:999px;height:8px;overflow:hidden}.progress-bar span{background:var(--red);height:100%;transition:width .2s;display:block}.question-panel{align-content:start;gap:20px;padding:clamp(18px,3.5vw,38px);display:grid}.category{color:var(--green);letter-spacing:.06em;text-transform:uppercase;margin:0;font-size:.78rem;font-weight:900}.question-panel h2{margin:0;font-size:clamp(1.25rem,3.5vw,2.4rem);line-height:1.15}.options{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.option{border-radius:var(--radius);color:#182a31;text-align:left;background:#f8fafb;border:2px solid #dbe5e8;justify-content:flex-start;align-items:flex-start;gap:10px;min-height:72px;padding:12px 14px;transition:border-color .12s,background .12s;display:flex}.option-letter{background:var(--green);color:#fff;border-radius:7px;flex:none;justify-content:center;align-items:center;width:32px;height:32px;font-size:.9rem;font-weight:900;display:inline-flex}.option-text{padding-top:4px;font-size:.95rem;line-height:1.35}.option:not(:disabled):hover{border-color:var(--green);background:var(--green-light)}.option.selected{background:var(--green-light);border-color:var(--green)}.option.correct{background:#e4f7ec;border-color:#1f8f55}.option.incorrect{background:var(--red-light);border-color:var(--red)}.option.correct .option-letter{background:#1f8f55}.option.incorrect .option-letter{background:var(--red)}.feedback{border-radius:var(--radius);align-items:flex-start;width:100%;padding:12px 16px;font-size:.95rem;font-weight:700;line-height:1.4;display:flex}.feedback.ok{color:#176c42;background:#e4f7ec}.feedback.bad{background:var(--red-light);color:#a43228}.timer{color:#182a31;background:#eff4f6;border-radius:8px;align-items:center;gap:6px;height:36px;padding:0 12px;font-size:.9rem;font-weight:900;display:inline-flex}.timer.danger{background:var(--red-light);color:#a43228}.quiz-footer{justify-content:flex-end;align-items:center;gap:12px;padding-bottom:8px;display:flex}.quiz-footer .secondary{margin-right:auto}.summary{align-content:start;gap:4px;padding:32px 36px;display:grid}.summary>img{object-fit:contain;justify-self:center;height:96px;margin-bottom:8px}.summary h1{margin-bottom:4px}.summary-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;width:100%;margin:12px 0 20px;display:grid}.metric{border:1px solid var(--border-soft);border-radius:var(--radius);background:#f7fafb;gap:6px;padding:14px;display:grid}.metric svg{color:var(--red)}.metric span{color:var(--text-subtle);font-size:.82rem;font-weight:700}.metric strong{font-size:1.4rem}@media (width<=900px){.shell{grid-template-columns:1fr;padding:20px}.login-shell{align-items:start;padding-top:24px}.summary-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (width<=600px){.shell{gap:14px;padding:14px}.login-panel{gap:20px;padding:22px 18px}.brand-strip img{width:66px;height:54px}.brand-strip{gap:12px}h1{margin-bottom:10px;font-size:clamp(1.6rem,8vw,2.4rem)}.login-form{max-width:100%}.login-form button{width:100%}.quiz-shell{gap:12px;padding:14px 14px 18px}.quiz-header{flex-wrap:wrap}.quiz-header-left h1{font-size:clamp(1.4rem,7vw,2rem)}.quiz-header-right{flex-direction:row;align-items:center}.counter{min-width:64px;height:40px;font-size:1rem}.question-panel{gap:16px;padding:16px}.question-panel h2{font-size:clamp(1.1rem,5vw,1.5rem)}.options{grid-template-columns:1fr;gap:8px}.option{min-height:56px}.option-text{font-size:.9rem}.quiz-footer{gap:10px}.quiz-footer button{flex:1}.summary{padding:20px 18px}.summary>img{height:72px}.summary-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.summary button{justify-content:center;width:100%}}