/* Scoped reading practice. Keep original questions and diagrams easy to read. */
.practice-panel{width:100%;min-width:0;margin:26px 0 0;color:#29466c;font-family:var(--sans,-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif);font-size:14px;line-height:1.8;overflow-wrap:anywhere}
.practice-panel *{box-sizing:border-box}
.practice-panel h2,.practice-panel h3,.practice-panel p,.practice-panel figure{margin:0}
.practice-panel .practice-icon{display:block;width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.practice-panel-header{display:flex;justify-content:space-between;align-items:center;gap:14px;padding-bottom:17px;border-bottom:1px solid #dce8f7}
.practice-panel-heading{display:flex;align-items:center;gap:12px;min-width:0}
.practice-heading-icon{display:grid;place-items:center;width:44px;height:44px;flex:none;background:#e6f3ff;border:1.5px solid #bddff8;border-radius:13px;color:#2787c6;box-shadow:3px 3px 0 #dbeafb;transform:rotate(-5deg)}
.practice-eyebrow{font-size:9px;font-weight:800;letter-spacing:1.2px;color:#8ba8c5;line-height:1.5}
.practice-panel-heading h2{font:850 23px/1.5 var(--sans,sans-serif);color:#2e6193;margin-top:2px}
.practice-count-badge{flex:none;padding:5px 9px;background:#fff1df;border:1px solid #f2d7ad;border-radius:8px;color:#bb8b46;font-size:11px;font-weight:750;white-space:nowrap;transform:rotate(3deg)}
.practice-introduction{padding:17px 0 20px;color:#7d97b3;font-size:13px;line-height:1.9}
.practice-result{display:flex;align-items:center;gap:20px;padding:22px 20px;margin:0 0 23px;background:#edf7ff;border:1.5px solid #cae3f8;border-radius:18px;box-shadow:0 4px 0 #e1edf9}
.practice-score-badge{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:90px;flex:none;text-align:center}
.practice-score-badge>strong{font:900 38px/1.2 var(--sans,sans-serif);color:#228aca;white-space:nowrap}
.practice-score-badge>strong small{font-size:16px;color:#90b6d4;font-weight:650}
.practice-score-badge>span{font-size:10px;color:#8ca8c0;margin-top:7px;white-space:nowrap}
.practice-score-badge>strong.practice-self-score{font-size:26px}
.practice-result-copy{min-width:0}
.practice-result-copy h3{font:800 18px/1.6 var(--sans,sans-serif);color:#467fae}
.practice-result-copy p{font-size:12px;color:#819bb5;margin-top:5px}
.practice-result-copy>span{display:block;font-size:10px;color:#9bb0c4;margin-top:6px}
.practice-question-list{display:grid;gap:18px}
.practice-question{width:100%;min-width:0;border:1px solid #d8e6f6;background:#fff;border-radius:17px;padding:20px;box-shadow:0 3px 0 #e7eff9}
.practice-question-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:13px;padding-bottom:11px;border-bottom:1px dashed #dfe9f6}
.practice-question-header h3{font:800 14px/1.5 var(--sans,sans-serif);color:#477aa7}
.practice-question-type{color:#96abc1;font-size:10px;white-space:nowrap}
.practice-question-body{font-size:14px;line-height:1.9;color:#3b5576;min-width:0}
.practice-source-paragraph{margin:8px 0!important;white-space:pre-wrap;overflow-wrap:anywhere;word-break:normal;line-height:1.9}
.practice-source-paragraph u{text-underline-offset:3px;text-decoration-thickness:1.2px}
.practice-source-paragraph b,.practice-source-paragraph strong{font-weight:750;color:#355476}
.practice-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px;margin-top:17px}
.practice-boolean-options{grid-template-columns:repeat(2,minmax(0,1fr))}
.practice-option{display:flex;align-items:center;justify-content:center;gap:7px;min-height:46px;width:100%;padding:9px 6px;border:1.5px solid #d2e3f6;border-radius:11px;background:#f7fbff;color:#7fa1c4;font:800 15px/1.5 var(--sans,sans-serif);box-shadow:0 3px 0 #e6eef9;transition:background .15s,border-color .15s,transform .15s;cursor:pointer}
.practice-option:hover:not(:disabled){border-color:#83bbed;background:#edf7ff;color:#4189c2}
.practice-option.is-selected{background:#deefff;border-color:#53a0de;color:#237ebc;box-shadow:0 3px 0 #bfddf5}
.practice-option.is-answer{border-color:#45a1cb;background:#e6f7fc;color:#258bb7;box-shadow:none}
.practice-option.is-wrong{border-color:#f0b172;background:#fff0e1;color:#cf873b;box-shadow:none}
.practice-option:disabled{opacity:1;cursor:default}
.practice-option:active:not(:disabled){transform:translateY(2px);box-shadow:none}
.practice-option .practice-icon{width:15px;height:15px}
.practice-option:focus-visible,.practice-action:focus-visible,.practice-written-answer:focus-visible,.practice-explanations>summary:focus-visible,.practice-table-scroll:focus-visible{outline:3px solid #f1a456;outline-offset:3px}
.practice-written-label{display:flex;align-items:center;gap:6px;margin:17px 0 8px;color:#6c91b4;font-size:12px;font-weight:650}
.practice-written-label .practice-icon{width:15px;height:15px}
.practice-written-answer{display:block;width:100%;min-width:0;min-height:110px;resize:vertical;padding:12px 13px;border:1.5px solid #d6e6f7;border-radius:11px;background:#f9fcff;color:#355d86;font-family:var(--sans,sans-serif);font-size:16px;line-height:1.8;outline:none;overflow-wrap:anywhere}
.practice-written-answer::placeholder{color:#a4b8cc;font-size:12px}
.practice-written-answer:focus{border-color:#83bae7;background:#fff}
.practice-written-answer[readonly]{background:#f5f9fd;color:#6986a3;resize:vertical}
.practice-written-hint{font-size:10px;color:#9bafc4;margin-top:7px!important;line-height:1.8}
.practice-question-feedback{display:flex;align-items:flex-start;gap:8px;padding:13px 14px;margin-top:15px;background:#eff8fc;border:1px solid #d4eaf4;border-radius:11px;color:#4b95b6;font-size:12px;line-height:1.8}
.practice-question-feedback>.practice-icon{width:17px;height:17px;margin-top:2px}
.practice-question-feedback>div{min-width:0}
.practice-question-feedback strong{display:block;font-size:12px;font-weight:750}
.practice-question-feedback p{font-size:12px;margin-top:3px;color:#7e9caf;white-space:pre-wrap}
.practice-question.is-wrong .practice-question-feedback,.practice-question.is-unanswered .practice-question-feedback{background:#fff6ec;border-color:#f4dfc7;color:#c69458}
.practice-question.is-wrong .practice-question-feedback p,.practice-question.is-unanswered .practice-question-feedback p{color:#b59a7b}
.practice-question.is-self-check .practice-question-feedback,.practice-question .practice-self-feedback{background:#f3f1fc;border-color:#e3ddf2;color:#9a85b5}
.practice-question .practice-self-feedback p{color:#a297b6}
.practice-images{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start;max-width:100%;min-width:0;margin:12px 0}
.practice-images>figure{flex:1 1 160px;min-width:0;max-width:100%}
.practice-images img{display:block;max-width:100%;height:auto;max-height:360px;object-fit:contain;margin:0 auto;background:#fff}
.practice-option-images{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.practice-option-images>figure{padding:10px;border:1px solid #e2ebf7;border-radius:10px;background:#fff;min-width:0}
.practice-option-images img{max-height:200px}
.practice-images figcaption{text-align:center;font-size:12px;font-weight:800;color:#6e92b4;padding-top:7px}
.practice-table-scroll{max-width:100%;overflow-x:auto;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;margin:13px 0;border:1px solid #d9e6f4;border-radius:10px;background:#fff}
.practice-table-scroll table{border-collapse:collapse;table-layout:auto;min-width:100%;font-size:12px;color:#6684a3;background:#fff}
.practice-table-scroll th,.practice-table-scroll td{padding:10px 12px;vertical-align:middle;text-align:left;border:1px solid #e0e9f5;min-width:78px;overflow-wrap:normal}
.practice-table-scroll th{font-weight:750;background:#edf6ff;color:#5c87af}
.practice-table-scroll tr:first-child>*{border-top:0}
.practice-table-scroll tr:last-child>*{border-bottom:0}
.practice-table-scroll tr>*:first-child{border-left:0}
.practice-table-scroll tr>*:last-child{border-right:0}
.practice-actions{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:25px 0;padding-top:21px;border-top:1px solid #dfe9f6}
.practice-actions>p{font-size:12px;color:#96abc0}
.practice-actions>p strong{font-weight:800;color:#5f94c2;white-space:nowrap}
.practice-action{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:12px 20px;border:1px solid #1684d4;border-radius:12px;background:#1684d4;color:#fff;box-shadow:0 4px 0 #0a65ae;font:750 13px/1.5 var(--sans,sans-serif);cursor:pointer;transition:transform .15s,background .15s;white-space:nowrap}
.practice-action:hover{background:#117ac7}
.practice-action:active{transform:translateY(2px);box-shadow:0 2px 0 #0a65ae}
.practice-action .practice-icon{width:16px;height:16px}
.practice-action.practice-retry{background:#fff;border:1.5px solid #c6def5;color:#5a8dbb;box-shadow:0 3px 0 #e1ebf7}
.practice-explanations{border:1px solid #d5e5f5;border-radius:15px;background:#fff;overflow:hidden;margin:25px 0 5px}
.practice-explanations>summary{display:flex;align-items:center;gap:9px;list-style:none;cursor:pointer;min-height:52px;padding:15px 17px;background:#eef7ff;color:#5188b4;font-size:13px;font-weight:800}
.practice-explanations>summary::-webkit-details-marker{display:none}
.practice-explanations>summary .practice-icon{width:18px;height:18px}
.practice-explanation-toggle{margin-left:auto;font-size:20px;line-height:1;transform:rotate(-90deg);transition:transform .15s;color:#91b0cc}
.practice-explanations[open]>.practice-explanation-toggle,.practice-explanations[open]>summary .practice-explanation-toggle{transform:rotate(0)}
.practice-explanation-content{padding:16px 18px;color:#748ca8;font-size:13px;line-height:1.95;min-width:0}
.practice-explanation-content .practice-source-paragraph{font-size:13px;line-height:1.95}
.practice-empty{padding:25px 18px;border:1px dashed #cbdef2;border-radius:14px;background:#f9fcff;color:#8ca4bf;font-size:13px;text-align:center}
.practice-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:600px){.practice-panel{margin-top:22px;font-size:13px}.practice-panel-header{gap:9px;padding-bottom:15px}.practice-panel-heading{gap:9px}.practice-heading-icon{width:39px;height:42px;border-radius:12px}.practice-panel-heading h2{font-size:19px}.practice-eyebrow{font-size:7px;letter-spacing:.8px}.practice-count-badge{font-size:9px;padding:4px 7px;border-radius:7px}.practice-introduction{font-size:12px;padding:16px 0 18px}.practice-result{padding:17px 14px;gap:13px;margin-bottom:20px;border-radius:16px}.practice-score-badge{min-width:69px}.practice-score-badge>strong{font-size:33px}.practice-score-badge>strong small{font-size:13px}.practice-score-badge>span{font-size:9px}.practice-score-badge>strong.practice-self-score{font-size:22px}.practice-result-copy h3{font-size:15px}.practice-result-copy p{font-size:11px}.practice-result-copy>span{font-size:9px}.practice-question-list{gap:16px}.practice-question{padding:17px 14px;border-radius:15px}.practice-question-header{gap:8px;margin-bottom:12px}.practice-question-header h3{font-size:13px}.practice-question-type{font-size:9px}.practice-question-body{font-size:14px;line-height:1.95}.practice-source-paragraph{line-height:1.95}.practice-options{gap:8px;margin-top:15px}.practice-option{min-height:46px;padding:9px 4px;border-radius:10px;font-size:14px;gap:4px}.practice-option .practice-icon{width:13px;height:13px}.practice-boolean-options .practice-option{font-size:12px}.practice-written-answer{padding:11px;min-height:105px;border-radius:10px}.practice-written-answer::placeholder{font-size:11px}.practice-written-hint{font-size:9px}.practice-question-feedback{padding:11px 10px;gap:6px}.practice-question-feedback strong,.practice-question-feedback p{font-size:11px}.practice-question-feedback>.practice-icon{width:15px;height:15px}.practice-images{gap:9px}.practice-option-images{gap:8px}.practice-option-images>figure{padding:7px;border-radius:8px}.practice-images figcaption{font-size:11px;padding-top:6px}.practice-table-scroll th,.practice-table-scroll td{padding:8px 10px;min-width:65px;font-size:11px}.practice-actions{gap:11px;margin:23px 0;padding-top:19px}.practice-actions>p{font-size:10px}.practice-action{font-size:12px;min-height:46px;padding:12px 14px;gap:7px;border-radius:11px}.practice-action .practice-icon{width:15px;height:15px}.practice-explanations{border-radius:13px;margin-top:23px}.practice-explanations>summary{font-size:12px;padding:14px;gap:7px;min-height:50px}.practice-explanation-content{padding:14px;color:#748ca8}.practice-explanation-content .practice-source-paragraph{font-size:13px;line-height:1.95}}
@media(max-width:360px){.practice-panel-heading h2{font-size:17px}.practice-heading-icon{width:35px;height:39px}.practice-panel-heading{gap:7px}.practice-count-badge{font-size:8px;padding:4px 6px}.practice-result{flex-direction:column;align-items:stretch;text-align:center;gap:12px}.practice-score-badge{min-width:0}.practice-result-copy h3{font-size:15px}.practice-question{padding:16px 12px}.practice-question-body{font-size:13px}.practice-options{gap:7px}.practice-option{font-size:13px;min-height:45px}.practice-option .practice-icon{width:11px;height:11px}.practice-boolean-options .practice-option{font-size:11px}.practice-actions{flex-direction:column;align-items:stretch;gap:12px}.practice-actions>p{text-align:center;font-size:11px}.practice-action{width:100%;font-size:12px}.practice-option-images{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.practice-option-images>figure{padding:5px}.practice-explanation-content{padding:13px 12px}}
@media(prefers-reduced-motion:reduce){.practice-panel *{transition:none!important}}

.practice-panel .practice-read-back{display:inline-flex;align-items:center;min-height:44px;padding:8px 13px;margin:0 0 18px;border:1px solid #d2e5f7;border-radius:11px;background:#f5faff;color:#4e87b5;font-size:12px;font-weight:700}.practice-panel .practice-authored-analysis{padding:15px;margin-top:14px;border:1px solid #dce8f4;border-radius:12px;background:#f7fbff;color:#537494;font-size:13px;line-height:1.9}.practice-authored-analysis>b{color:#387bb0}.practice-authored-analysis p{margin-top:5px}.practice-authored-analysis blockquote{border-left:3px solid #bbd7ef;padding-left:11px;margin:10px 0 0;font:14px/1.8 Georgia,serif;color:#6b87a3;overflow-wrap:anywhere}

.practice-panel .practice-options.authored-options{display:grid;grid-template-columns:1fr;gap:11px}.practice-panel .authored-options .practice-option{width:100%;justify-content:flex-start;gap:11px;text-align:left;padding:12px 14px;min-height:54px;line-height:1.75}.practice-panel .authored-options .practice-choice-letter{flex:none;width:25px;height:25px;background:#e6f1fc;color:#6e9bc1;border-radius:7px;display:grid;place-items:center;font-size:11px}.practice-panel .authored-options .practice-choice-text{font-size:13px;font-weight:500;line-height:1.75;overflow-wrap:anywhere}.practice-panel .authored-options .practice-icon{margin-left:auto;flex:none}.practice-panel .authored-options .is-selected .practice-choice-letter{background:#cce6fb;color:#3b83bd}.practice-panel .authored-options .is-answer .practice-choice-letter{background:#d6eddf;color:#4e8d68}.practice-panel .authored-options .is-wrong .practice-choice-letter{background:#f7dcdc;color:#b87575}

.practice-previous-score{margin:0 0 16px;padding:10px 13px;border-radius:10px;background:#edf5ff;color:#365e85;font-size:12px;line-height:1.8}.practice-previous-score strong{color:#196cb4}