*{box-sizing:border-box}:root{color-scheme:dark;--bg:#101314;--panel:#191d1e;--line:#30383b;--text:#e1e5e5;--muted:#a2acad;--blue:#73aee9;--green:#78cf91;--red:#ec8491;--yellow:#ffbe54}body{margin:0;background:var(--bg);color:var(--text);font:15px Arial,Helvetica,sans-serif;line-height:1.55}header{height:62px;background:#151819;border-bottom:1px solid #293033;padding:0 24px;display:flex;justify-content:space-between;align-items:center}header a{color:var(--blue);text-decoration:none}.brand{font-size:22px;color:#e2e5e5;font-weight:800;letter-spacing:-.5px}.brand:first-letter{color:#537cff}main{max-width:1320px;margin:auto;padding:30px 22px 50px}.summary{padding:24px 26px;background:#191d1e;border:1px solid var(--line);border-radius:10px}.eyebrow{font-size:11px;letter-spacing:.09em;color:var(--blue);font-weight:bold}h1{font-size:32px;margin:6px 0 0}#subtitle{margin:4px 0 18px;color:var(--muted)}.score-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;max-width:700px}.score-cards article{background:#202627;border:1px solid #343d40;padding:13px 16px;border-radius:7px}.score-cards span{display:block;color:var(--muted);font-size:10px;letter-spacing:.08em}.score-cards strong{display:block;font-size:24px;margin-top:3px}.actions{display:flex;gap:8px;margin-top:18px}.actions button{background:#22292b;color:var(--text);border:1px solid #465358;border-radius:4px;padding:9px 14px;cursor:pointer}.actions button:first-child{background:#25456a;border-color:#46688e}.response-section{margin-top:30px}.section-title{display:flex;justify-content:space-between;align-items:end;margin-bottom:12px}.section-title h2{font-size:22px;margin:3px 0}.section-title p{max-width:460px;color:var(--muted);font-size:13px;margin:0}.explanation-tools{text-align:right}.explanation-tools button{margin-top:5px;background:#22292b;color:var(--text);border:1px solid #465358;border-radius:4px;padding:6px 10px;cursor:pointer}.part-review{margin:12px 0;background:#191d1e;border:1px solid var(--line);border-radius:8px;overflow:hidden}.part-results,.explanation-card{margin:0;background:#191d1e;border:0;border-radius:0;overflow:hidden}.explanation-card{border-top:1px solid var(--line)}.part-heading{padding:12px 16px;background:#202627;display:flex;justify-content:space-between;align-items:center;font-weight:bold}.part-score{font:14px Consolas,monospace;color:var(--green)}.part-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px;padding:5px 16px 12px}.answer-row{display:grid;grid-template-columns:48px minmax(80px,1fr) minmax(100px,1fr);gap:8px;align-items:center;min-height:42px;border-bottom:1px solid #2b3234}.answer-row .number{color:var(--muted);font:13px Consolas,monospace}.answer-row .user-answer{overflow-wrap:anywhere}.answer-row .expected{color:#cbd4d5;font-size:13px}.answer-row.correct .status{color:var(--green)}.answer-row.incorrect .status{color:var(--red)}.answer-row.blank .status{color:var(--yellow)}.status{font-size:12px}.explanation-card summary{padding:14px 16px;background:#202627;font-weight:bold;cursor:pointer;list-style:none;display:flex;justify-content:space-between}.explanation-card summary::-webkit-details-marker{display:none}.explanation-card summary:after{content:'＋';color:var(--blue)}.explanation-card[open] summary:after{content:'−'}.explanation-content{padding:14px 18px 20px;overflow-wrap:anywhere}.explanation-content p{margin:8px 0}.explanation-content table{border-collapse:collapse;width:100%;margin:10px 0}.explanation-content td,.explanation-content th{border:1px solid #3c474a;padding:8px;vertical-align:top}.explanation-content img{max-width:100%;height:auto}.explanation-content ul,.explanation-content ol{padding-left:25px}footer{display:flex;justify-content:space-between;margin-top:34px;border-top:1px solid var(--line);padding-top:17px;color:var(--muted);font-size:12px}footer a{color:var(--blue);text-decoration:none}@media(max-width:760px){main{padding:18px 12px 35px}.section-title{display:block}.section-title p{margin-top:5px}.explanation-tools{text-align:left}.part-list{grid-template-columns:1fr}.score-cards{gap:6px}.score-cards article{padding:10px}.score-cards strong{font-size:20px}.answer-row{grid-template-columns:38px minmax(50px,.8fr) minmax(90px,1fr)}header{padding:0 12px}footer{gap:12px;flex-direction:column}}