:root{--ink:#173448;--muted:#5b6f7c;--teal:#006f68;--teal-light:#e7f5f1;--line:#d9e3e7;--paper:#fff;--back:#f3f6f7;--red:#a3293d;--red-light:#fff0f2;--gold:#805c10;--shadow:0 8px 28px #17344808}
*{box-sizing:border-box}body{margin:0;background:var(--back);color:var(--ink);font-family:Segoe UI,Arial,sans-serif;font-size:16px;line-height:1.55}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,select,summary{cursor:pointer}button{border:1px solid var(--line);border-radius:10px;padding:9px 15px;background:white;color:var(--ink);font-weight:600}button:hover:not(:disabled){border-color:var(--teal);background:#f0f8f6}button:disabled{opacity:.5;cursor:default}button.primary{background:var(--teal);border-color:var(--teal);color:white}button.primary:hover:not(:disabled){background:#005951}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #d39b28;outline-offset:3px}a{color:var(--teal)}.shell{max-width:1260px;margin:auto;padding:0 28px}.masthead{background:#143a4a;color:white;padding:31px 0 29px}.brand{font-size:12px;text-transform:uppercase;letter-spacing:2px;color:#8cd2c5;font-weight:700}h1{font-size:clamp(28px,4vw,39px);margin:7px 0 7px;line-height:1.18;letter-spacing:-1px}.masthead p{max-width:790px;color:#d8e7eb;margin:0}.topline{display:flex;align-items:center;justify-content:space-between;gap:18px}.offline{border:1px solid #4b747e;padding:7px 12px;border-radius:22px;font-size:13px;white-space:nowrap;color:#c6eadf}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:20px 0}.toolbar-actions{display:flex;gap:8px;flex-wrap:wrap}.save-status{font-size:13px;color:var(--teal)}.save-status.warning{color:var(--red)}.exam-tabs{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin:0 0 23px}.exam-tab{text-align:left;padding:17px 19px;box-shadow:var(--shadow);position:relative}.exam-tab[aria-pressed=true]{border:2px solid var(--teal);background:#f3fcf9;padding:16px 18px}.exam-tab strong{display:block;font-size:19px}.exam-tab span{font-weight:400;color:var(--muted);font-size:13px;display:block;margin-top:5px}.exam-tab .tab-bar{height:4px;background:#dbe9e6;display:block;border-radius:8px;margin-top:13px;overflow:hidden}.exam-tab .tab-fill{height:100%;background:var(--teal);margin:0}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 304px;gap:22px;align-items:start}.card{border:1px solid var(--line);border-radius:15px;background:white;box-shadow:var(--shadow)}.question-card{padding:27px 29px}.question-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.eyebrow{color:var(--muted);font-size:13px;font-weight:600}.bookmark{padding:7px 12px;font-size:13px}.bookmark[aria-pressed=true]{color:var(--gold);background:#fff7dc;border-color:#dec789}.tags{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0 0}.tag{font-size:12px;color:var(--muted);background:#f0f4f5;border-radius:5px;padding:3px 8px}.tag.star{color:var(--gold);background:#fff5d7}fieldset{padding:0;border:0;margin:19px 0 0;min-width:0}legend{font-size:21px;line-height:1.5;font-weight:600;padding:0;margin-bottom:19px;width:100%}.options{display:grid;gap:10px}.option{border:1px solid var(--line);border-radius:10px;display:flex;align-items:center;gap:12px;padding:13px 14px;cursor:pointer;line-height:1.45}.option:hover{background:#f8fbfb}.option:has(input:checked){border-color:var(--teal);background:#f1faf7}.option input{accent-color:var(--teal);width:18px;height:18px;margin:0;flex-shrink:0}.letter{font-weight:700;font-size:13px;align-self:center}.option.correct{border:2px solid var(--teal);background:var(--teal-light);padding:12px 13px}.option.wrong{border:2px solid var(--red);background:var(--red-light);padding:12px 13px}.option.locked{cursor:default}.choice-text{flex:1}.choice-result{font-size:12px;font-weight:600;white-space:nowrap}.question-actions{display:flex;gap:10px;align-items:center;margin-top:21px;flex-wrap:wrap}.answer-note{font-size:13px;color:var(--muted)}.feedback{border-radius:12px;border-left:4px solid var(--teal);background:var(--teal-light);padding:17px 20px;margin-top:24px}.feedback.incorrect{border-color:var(--red);background:var(--red-light)}.feedback h2{margin:0 0 7px;font-size:18px}.feedback p{margin:6px 0}.source-label{font-size:13px;color:var(--muted);margin-top:12px!important}.source-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:7px}.source-links a{font-size:13px;display:inline-block;border:1px solid #b8cbc9;padding:5px 9px;border-radius:6px;background:#fff;text-decoration:none}.sources{margin-top:15px;border:1px solid var(--line);border-radius:10px;background:white}.sources summary{padding:11px 14px;font-size:14px;font-weight:600}.source-content{padding:0 14px 16px}.source-content p{font-size:13px;color:var(--muted)}.source-page{margin:20px 0 0}.source-page figcaption{font-size:13px;font-weight:600;margin-bottom:8px}.source-page img{max-width:100%;height:auto;border:1px solid var(--line);display:block}.image-link{display:block;cursor:zoom-in}.source-error{color:var(--red);font-size:13px}.question-nav{display:flex;justify-content:space-between;gap:12px;margin-top:23px;border-top:1px solid var(--line);padding-top:18px}.question-nav button{min-width:106px}.position-note{font-size:12px;color:var(--muted);align-self:center;text-align:center}.navigator{padding:19px}.navigator h2{font-size:16px;margin:0 0 13px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:7px;margin-bottom:16px}.stat{background:var(--back);border-radius:8px;padding:8px 5px;text-align:center}.stat strong{display:block;font-size:21px;line-height:1.3}.stat span{font-size:11px;color:var(--muted)}.stat.good strong{color:var(--teal)}.stat.bad strong{color:var(--red)}.meter{height:7px;background:#e8eef0;border-radius:5px;overflow:hidden;margin-bottom:7px}.meter-fill{height:100%;background:var(--teal);width:0}.progress-copy{font-size:12px;color:var(--muted);margin-bottom:17px}.filter-label{font-size:13px;display:block;margin-bottom:5px}select{width:100%;background:white;border:1px solid var(--line);border-radius:7px;padding:8px;font-size:13px;color:var(--ink)}.question-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;margin:14px 0}.q-cell{font-size:12px;border-radius:6px;padding:5px 0;min-height:32px;font-weight:500;position:relative}.q-cell.good{color:var(--teal);background:var(--teal-light);border-color:#a9d4c8}.q-cell.bad{color:var(--red);background:var(--red-light);border-color:#e7bec6}.q-cell[aria-current=true]{outline:2px solid var(--ink);outline-offset:1px;font-weight:700}.q-cell.marked:after{content:'';width:5px;height:5px;border-radius:50%;background:#ac7b10;position:absolute;top:3px;right:3px}.grid-key{display:flex;gap:11px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.grid-key span:before{content:'';display:inline-block;height:8px;width:8px;border-radius:2px;margin-right:4px;background:#e8eef0}.grid-key .good:before{background:#71b8a5}.grid-key .bad:before{background:#da8797}.grid-key .marked:before{background:#ac7b10}.side-actions{display:grid;gap:8px;margin-top:18px}.side-actions button{font-size:13px}.small-note{color:var(--muted);font-size:12px;line-height:1.5;margin:16px 0 0}.results{background:#e9f5f1;border:1px solid #bddbd1;border-radius:14px;padding:22px 25px;margin-bottom:22px}.results h2{margin:0 0 7px;font-size:23px}.results p{margin:5px 0 13px}.summary-card{margin-top:23px;padding:20px 25px}.summary-card summary{font-weight:600}.summary-card ul{padding-left:21px;color:var(--muted);font-size:14px}.summary-card li{margin:9px 0}.footer{font-size:12px;color:var(--muted);padding:24px 0 32px}.footer p{margin:7px 0}.notice{padding:11px 15px;border-radius:8px;background:#fff5d7;color:#674c15;margin:0 0 18px;font-size:14px}.empty{grid-column:1/-1;font-size:13px;color:var(--muted);padding:10px 0}.help{margin-top:22px;padding:18px 22px;font-size:14px;color:var(--muted)}.help summary{font-weight:600;color:var(--ink)}.help p{margin:11px 0}.hidden,[hidden]{display:none!important}
.option.wrong:has(input:checked){border-color:var(--red);background:var(--red-light)}
@media(max-width:980px){.workspace{grid-template-columns:minmax(0,1fr) 250px}.shell{padding:0 20px}.question-card{padding:23px}.navigator{padding:15px}.question-grid{gap:4px}.choice-result{white-space:normal;font-size:11px}}
@media(max-width:740px){.exam-tabs{grid-template-columns:repeat(3,1fr)}.shell{padding:0 14px}.masthead{padding:24px 0}.topline{align-items:flex-start}.offline{display:none}.toolbar{align-items:flex-start;flex-direction:column;gap:10px}.exam-tabs{gap:7px;margin-bottom:16px}.exam-tab,.exam-tab[aria-pressed=true]{padding:11px}.exam-tab strong{font-size:16px}.exam-tab span{font-size:11px}.workspace{grid-template-columns:1fr;gap:16px}.question-card{padding:19px 17px}legend{font-size:19px}.option{padding:12px 10px;gap:8px}.option.correct,.option.wrong{padding:11px 9px}.choice-result{font-size:10px;max-width:48px}.question-nav button{min-width:90px;padding:8px 10px}.question-grid{grid-template-columns:repeat(12,1fr)}.navigator{padding:18px}.results{padding:19px}.question-top{align-items:flex-start}.bookmark{font-size:12px}.summary-card{padding:17px}.question-actions .primary{width:100%}.answer-note{font-size:12px}}
@media(max-width:400px){.question-grid{grid-template-columns:repeat(10,1fr)}.exam-tab span{line-height:1.4}.position-note{max-width:70px}.letter{font-size:12px}}
@media print{.masthead{background:white;color:var(--ink)}.masthead p{color:var(--muted)}.toolbar,.exam-tabs,.navigator,.question-actions,.question-nav,.bookmark,.help,.offline{display:none}.workspace{display:block}.card{box-shadow:none}.source-page img{max-height:80vh;object-fit:contain}.shell{max-width:none}.source-links{display:none}}

.radiology-figure{margin:0 0 22px;padding:16px;background:#f1f4f5;border:1px solid var(--line);border-radius:11px}.radiology-image{display:block;width:auto;max-width:100%;max-height:520px;margin:0 auto 13px;background:#111}.radiology-figure figcaption{font-size:13px;color:var(--muted);line-height:1.5;margin-bottom:12px}.radiology-figure button{font-size:13px}.explanation-lines{margin:12px 0}.explanation-line{margin:5px 0!important}#image-dialog{width:min(1100px,94vw);height:min(90vh,1000px);padding:20px;border:1px solid var(--line);border-radius:14px;color:var(--ink)}#image-dialog::backdrop{background:#102f42bc}.zoom-toolbar{display:flex;justify-content:space-between;align-items:center;gap:12px}.zoom-label{font-size:13px;margin-right:10px}#zoom-range{vertical-align:middle;max-width:200px}#zoom-caption{font-size:13px}.zoom-scroll{height:calc(100% - 140px);overflow:auto;background:#192b32}#zoom-image{display:block;max-width:none;width:100%;height:auto;margin:auto}.exam-tab strong{font-size:17px}.exam-tab span{line-height:1.45}

.access-gate{padding-top:38px;padding-bottom:48px}.gate-card{max-width:670px;margin:auto;padding:30px}.gate-card h2{font-size:27px;margin:8px 0 10px;line-height:1.25}.gate-brand{color:var(--teal)}.gate-note{font-size:13px;color:var(--muted);margin:24px 0 0}.gate-button{display:inline-block;background:var(--teal);color:white;border-radius:10px;padding:11px 18px;margin:10px 0;text-decoration:none;font-weight:600}.account-label{font-size:13px;align-self:center;max-width:230px;overflow-wrap:anywhere}.toolbar-actions #signout{font-size:13px;align-self:center;padding:8px}.cloud-message p{margin:0}.cloud-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:9px}.save-status{min-width:150px}.save-status.saving{color:var(--muted)}.cloud-message{background:#fff0f2;color:var(--red);border:1px solid #e7bec6}.gate-card button{margin-top:10px}@media(max-width:740px){.gate-card{padding:23px}.access-gate{padding-top:22px}.account-label{max-width:100%;flex-basis:100%}.toolbar-actions{width:100%}.cloud-actions button{width:100%}}