.sidebar{overflow-y:auto}.sidebar>*{flex-shrink:0}
.study-nav{display:flex;align-items:center;gap:11px;margin-top:24px;padding:14px 12px;border:1px solid #d7e2d0;border-radius:9px;background:#e8eedf;color:#315e46;font-size:13px}
.study-nav-icon{display:grid;place-items:center;width:27px;height:29px;border:1px solid #a9bfa1;border-radius:6px;font-size:17px}
.study-nav small{display:block;font-size:10px;margin-top:6px;color:#7c8f72}.study-nav-arrow{margin-left:auto}.study-nav:hover{background:#dfe9d5}.study-nav.active{background:var(--green);color:#fff;border-color:var(--green)}.study-nav.active small{color:#cfddc7}.study-nav.active .study-nav-icon{border-color:#ffffff55}
.study-nav+.nav-label{margin-top:24px}.study-home-link{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:23px;padding:20px 24px;border:1px solid #dce5d3;border-radius:11px;background:#fff}.study-home-link strong{font-size:15px;color:var(--green)}.study-home-link small{display:block;margin-top:7px;color:#84917d;font-size:12px}.study-home-link>span:last-child{color:var(--green);font-size:12px;white-space:nowrap}
.study-view{padding-bottom:20px}.study-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:28px}.study-heading .eyebrow{margin-bottom:12px;font-size:10px}.study-heading h1{font-family:"SimSun","Songti SC",serif;font-size:33px;letter-spacing:2px;line-height:1.5;font-weight:600;margin:0;color:#244d3a}.study-heading p:not(.eyebrow){font-size:13px;color:#7f8b78;line-height:1.8;margin:10px 0 0}.study-reading-link{font-size:12px;color:#73876a;border-bottom:1px solid #d5decc;padding:8px 0;white-space:nowrap}
.study-order-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 17px;margin-bottom:20px;border:1px solid var(--line);border-radius:9px;background:#fff}.study-order-choice{display:flex;align-items:center;gap:14px}.study-order-choice>span{font-size:12px;color:#78896c;white-space:nowrap}.study-order-buttons{display:flex;gap:3px;border:1px solid #e0e7d8;background:#f1f4ec;border-radius:7px;padding:3px}.study-order-buttons button{border:0;border-radius:4px;background:transparent;color:#859577;font-size:12px;line-height:1.6;padding:6px 18px;white-space:nowrap}.study-order-buttons button[aria-pressed="true"]{background:var(--green);color:white}.study-order-buttons button:hover:not([aria-pressed="true"]){background:#e4ebdb;color:#486b3b}.study-order-bar>p{font-size:11px;color:#98a48c;line-height:1.7;margin:0}.study-order-bar.in-quiz{background:transparent;border:0;border-radius:0;padding:0;margin:0 0 22px}
.quiz-memory{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:20px}.quiz-memory-button{border:1px solid #dddcc9;border-radius:7px;background:#fffef8;padding:10px 15px;color:#97855d;font-size:12px;line-height:1.7}.quiz-memory-button:hover{background:#f7f1df;border-color:#c6b584}.quiz-memory-button[aria-pressed="true"]{background:#f5edda;border-color:#cdb576;color:#957337}.quiz-memory>span{font-size:10px;line-height:1.8;color:#9ca58e}.study-marked-list{margin-top:15px;padding:16px 20px;border:1px solid #e5dfcd;border-radius:9px;background:#faf7ee}.study-marked-list summary{color:#9a824f;font-size:12px;cursor:pointer}.study-marked-list>div{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}.study-marked-list>div>span{padding:5px 10px;font-size:12px;color:#8d784d;background:#fff;border:1px solid #e8dfc8;border-radius:5px}.study-marked-list>p{font-size:10px;line-height:1.8;color:#a49777;margin:13px 0 0}
@media(max-width:760px){.study-order-bar{flex-wrap:wrap;gap:9px;padding:12px 14px}.study-order-choice{gap:12px}.study-order-buttons button{padding:6px 17px}.study-order-bar>p{font-size:10px}.study-order-bar.in-quiz{margin-bottom:18px;gap:8px}}
.study-hero{display:flex;align-items:center;justify-content:space-between;gap:26px;padding:32px 37px;background:linear-gradient(110deg,#eaf0e2,#f4f4e9);border:1px solid #dfe6d4;border-radius:15px}.study-pill{display:inline-block;font-size:10px;letter-spacing:1px;padding:7px 10px;background:#fff9;color:#608053;border-radius:5px}.study-hero h2{font-size:23px;letter-spacing:.6px;line-height:1.6;margin:17px 0 10px;font-weight:600;color:#335b40}.study-hero p{font-size:12px;line-height:1.9;color:#7e8e71;max-width:570px;margin:0 0 22px}.study-primary,.study-day-button,.study-secondary{border:0;border-radius:7px;padding:12px 20px;background:var(--green);color:#fff;font-size:13px;line-height:1.5;transition:background .18s}.study-primary:hover,.study-day-button:hover{background:#23675a}.study-primary:disabled,.study-day-button:disabled{opacity:.65;cursor:default}.study-resume-note{display:block;margin-top:12px;font-size:11px;color:#788a6f}
.study-ring{width:143px;height:143px;flex-shrink:0;border-radius:50%;padding:7px;background:conic-gradient(#668658 var(--learned),#dce6d0 0);transform:rotate(-90deg)}.study-ring>div{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;border-radius:50%;background:#f1f3e7;transform:rotate(90deg)}.study-ring strong{font-size:36px;line-height:1.5;font-weight:500;font-variant-numeric:tabular-nums;color:#335b40}.study-ring span{font-size:10px;color:#8c9b7d}
.study-stats{display:grid;grid-template-columns:repeat(3,1fr);margin:25px 0 35px;padding:20px 0;background:white;border:1px solid var(--line);border-radius:11px}.study-stats>div{text-align:center;display:flex;flex-direction:column;gap:6px;border-right:1px solid var(--line)}.study-stats>div:last-child{border:0}.study-stats strong{font-size:25px;font-weight:500;font-variant-numeric:tabular-nums;color:#436039}.study-stats strong small{font-size:13px;color:#a3ad99;font-weight:400}.study-stats span{font-size:11px;color:#8b977f}
.study-section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:26px 0 17px}.study-section-title h2{font-size:18px;letter-spacing:.5px;margin:0;font-weight:600}.study-section-title time,.study-section-title>span{font-size:11px;color:#929e87}.study-section-title p{font-size:12px;color:#8b977f;margin:9px 0 0;line-height:1.8}
.study-task-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.study-task{padding:20px;background:white;border:1px solid var(--line);border-radius:10px}.study-task-title{display:flex;align-items:center;gap:9px}.study-task-title h3{font-size:13px;margin:0;font-weight:500}.study-task-title>strong{margin-left:auto;white-space:nowrap;font-size:22px;font-weight:500;color:#516d46}.study-task-title small{font-size:11px;font-weight:400;color:#9ca78f}.task-dot{width:15px;height:15px;border:1px solid #d9e0d1;border-radius:4px;display:grid;place-items:center;color:white;font-size:10px;flex-shrink:0}.task-dot.done{background:#829c72;border-color:#829c72}.study-task p{font-size:11px;line-height:1.9;color:#8c9980;min-height:42px;margin:14px 0}.study-text-button{padding:0;border:0;background:none;color:#5f7e50;font-size:11px;line-height:1.8;text-align:left}.study-text-button span{margin-left:6px}.study-text-button:hover{color:var(--green)}.study-text-button:disabled{cursor:default;color:#a3ad99}.plan-title{margin-top:37px}
.study-plan-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:13px;align-items:start}.plan-day{background:#fff;border:1px solid var(--line);border-radius:10px;padding:17px 15px;min-width:0}.plan-day.today{border-color:#7d9c6f;box-shadow:0 0 0 1px #7d9c6f22}.plan-day.complete{background:#f2f6ed;border-color:#d5e2c9}.plan-day-top{display:flex;align-items:center;justify-content:space-between;gap:5px}.plan-day-top>span{font-size:9px;letter-spacing:1px;color:#a0aa95}.plan-day-top small{font-size:9px;color:#889b79}.plan-day.today .plan-day-top small{color:#496e3b}.plan-day h3{font-size:16px;font-weight:500;margin:20px 0 17px;display:flex;align-items:center;justify-content:space-between;gap:8px}.plan-day h3 span{font-size:10px;font-weight:400;color:#a2ac96}.plan-day-count{display:flex;align-items:baseline;gap:5px}.plan-day-count strong{font-size:27px;font-weight:500;line-height:1.4;color:#4d6d41;font-variant-numeric:tabular-nums}.plan-day-count>span{font-size:10px;color:#a0ab95}
.study-view progress{display:block;width:100%;height:4px;border:0;border-radius:5px;overflow:hidden;background:#e9eee2;appearance:none}.study-view progress::-webkit-progress-bar{background:#e9eee2;border-radius:5px}.study-view progress::-webkit-progress-value{background:#839f70;border-radius:5px;transition:width .25s}.study-view progress::-moz-progress-bar{background:#839f70;border-radius:5px}.plan-day progress{margin:12px 0 17px}.plan-day summary{font-size:11px;color:#7d8f6d;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:5px;line-height:1.7}.plan-day summary span{font-size:9px;color:#a1ab97}.plan-day summary span:after{content:' ＋'}.plan-day details[open] summary span:after{content:' −'}.plan-day ul{list-style:none;padding:0;margin:13px 0 0;max-height:300px;overflow-y:auto}.plan-day li{padding:8px 0;border-top:1px solid #edf0e8;font-size:11px;display:flex;align-items:baseline;justify-content:space-between;gap:7px;color:#6e8260;line-height:1.7}.plan-day li small{display:block;font-size:9px;color:#a1ad95;margin-top:3px}.plan-day li b{font-size:10px;font-weight:400;white-space:nowrap;color:#a3ae97}.study-day-button,.study-secondary{display:block;width:100%;font-size:10px;padding:9px 4px;margin-top:19px;text-align:center;white-space:normal}.study-secondary{border:1px solid #dce5d3;color:#8a9d78;background:#f6f8f1;cursor:default}.study-note{display:flex;align-items:baseline;gap:12px;margin:25px 0 0;padding:17px 20px;background:#f0f3e9;border-radius:8px;color:#8b9c7b}.study-note>span{font-size:17px}.study-note p{margin:0;line-height:1.95;font-size:11px}
.quiz-layout{max-width:770px;margin:0 auto;min-height:calc(100vh - 230px)}.quiz-top{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:0 0 25px}.quiz-top>span{font-size:12px;color:#8e9d83}.quiz-progress-row{display:flex;align-items:center;gap:15px}.quiz-progress-row progress{flex:1;height:5px}.quiz-progress-row>span{font-size:12px;color:#8a9c7f;white-space:nowrap;min-width:55px;text-align:right}.quiz-question{text-align:center;padding:46px 0 35px}.quiz-question .eyebrow{font-size:9px;color:#a8b19e;letter-spacing:2px;margin-bottom:19px}.quiz-question h1{font-size:48px;line-height:1.6;font-family:"SimSun","Songti SC",serif;letter-spacing:10px;font-weight:600;color:#234f3b;margin:0;outline:none}.quiz-question>p:last-child{font-size:12px;color:#95a28a;margin-top:15px;letter-spacing:1px}.quiz-options{display:grid;gap:12px}.quiz-option{display:flex;align-items:center;gap:15px;text-align:left;background:#fff;border:1px solid #dfe6d6;border-radius:11px;padding:19px 21px;min-height:73px;line-height:1.85;font-size:14px;color:#5a6e4f;transition:border-color .2s,background .2s}.quiz-option:hover:not(:disabled){border-color:#8da879;background:#f6f8f0}.option-letter{border:1px solid #e1e7d9;border-radius:6px;width:28px;height:28px;display:grid;place-items:center;flex-shrink:0;font-size:12px;color:#a1ad96;line-height:1}.option-status{margin-left:auto;flex-shrink:0;font-size:18px}.quiz-option:disabled{cursor:default;opacity:1}.quiz-option.is-correct{border-color:#7aa66b;background:#edf5e6;color:#3c6e2d}.quiz-option.is-correct .option-letter{background:#7ba46c;color:white;border-color:#7ba46c}.quiz-option.is-wrong{border-color:#d7a78c;background:#fbf0e8;color:#a06644}.quiz-option.is-wrong .option-letter{background:#bb8c70;color:white;border-color:#bb8c70}.quiz-option.is-muted{background:#fafaf7;color:#a0ac94;border-color:#e9ece3}.quiz-actions{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:25px 0 0}.quiz-unknown{border:0;border-bottom:1px solid #cfdac3;color:#7a8f6c;background:transparent;font-size:12px;padding:8px 0}.quiz-keyboard{color:#b1baa7;font-size:10px}.quiz-actions .study-primary{min-width:180px}.quiz-save-note{text-align:center;font-size:10px;color:#a4b098;margin:28px 0 15px}
.quiz-feedback{margin-top:25px;padding:22px 25px;border:1px solid #dde6d4;border-radius:11px;background:#f2f6eb}.quiz-feedback.incorrect{background:#f8f3e9;border-color:#e8deca}.feedback-heading{display:flex;justify-content:space-between;gap:12px;align-items:center}.feedback-heading strong{font-size:13px;color:#61874d;font-weight:500}.feedback-heading>span{font-size:10px;color:#9baa8c}.incorrect .feedback-heading strong{color:#a27c48}.feedback-meaning{line-height:1.9;font-size:13px;color:#61764e;margin:18px 0 12px}.feedback-meaning b{font-weight:600;color:#436434}.feedback-confusion{font-size:12px;color:#a18460;line-height:1.8}.feedback-example{font-size:12px;line-height:1.9;color:#7e8f6d;margin:14px 0}.feedback-example>span{border:1px solid #d8e1cb;border-radius:3px;padding:2px 5px;font-size:9px;color:#8c9c7b;margin-right:8px;white-space:nowrap}.feedback-originals{margin:14px 0}.feedback-originals summary{font-size:11px;cursor:pointer;color:#8a9d79}.feedback-originals p{font-size:12px;line-height:1.9;color:#849575;padding-left:12px;border-left:2px solid #d6e0ca}.feedback-footer{padding-top:14px;margin-top:16px;border-top:1px solid #dfe7d5;display:flex;justify-content:space-between;gap:12px;line-height:1.8}.feedback-footer>span{font-size:10px;color:#9aaa89}
.quiz-completion{text-align:center;max-width:650px;margin:30px auto;padding:45px 25px}.completion-mark{display:grid;place-items:center;width:76px;height:76px;border:1px solid #ccdcbf;border-radius:50%;background:#e8f0df;color:#759464;font-size:34px;margin:0 auto 27px}.quiz-completion .eyebrow{font-size:10px;letter-spacing:2px}.quiz-completion h1{font-size:28px;font-family:"SimSun","Songti SC",serif;color:#325b40;font-weight:600;line-height:1.6;margin:12px 0 14px}.quiz-completion>p:not(.eyebrow){font-size:12px;color:#94a185;line-height:1.9}.completion-stats{display:grid;grid-template-columns:repeat(3,1fr);padding:28px 0;border-block:1px solid var(--line);margin:30px 0 22px}.completion-stats>div{display:flex;flex-direction:column;gap:10px}.completion-stats strong{font-size:28px;color:#5a794a;font-weight:500}.completion-stats small{font-size:14px}.completion-stats span{font-size:11px;color:#99a78b}.quiz-completion .completion-description{margin-bottom:25px}.study-empty,.study-loading{text-align:center;padding:70px 20px;color:#8a9b7c;font-size:13px;line-height:1.9}.study-empty h1{font-size:23px}.study-save-error{background:#fcf0e7;border:1px solid #e6c8ad;color:#a06b43;font-size:12px;line-height:1.9;padding:14px 20px;border-radius:8px}
@media(min-width:1550px){.study-hero{padding:40px 45px}.study-heading h1{font-size:37px}.study-hero h2{font-size:26px}.plan-day{padding:20px}.study-ring{width:160px;height:160px}}
@media(max-width:1250px){.study-plan-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.study-hero{padding:28px}.study-task{padding:16px}.study-task-title{gap:7px}.study-task-title h3{font-size:12px}.study-heading h1{font-size:28px}}
@media(max-width:900px){.study-task-grid{grid-template-columns:1fr}.study-task p{min-height:0;margin:10px 0}.study-task-title h3{font-size:13px}.study-hero{padding:26px}.study-ring{width:115px;height:115px}.study-hero h2{font-size:20px}.study-heading{align-items:flex-start}.study-heading h1{font-size:27px}.study-reading-link{font-size:11px}}
@media(max-width:760px){.sidebar{overflow-y:auto}.sidebar-bottom{flex-shrink:0}.study-nav{margin-top:20px}.study-heading{gap:12px;flex-wrap:wrap;margin-bottom:20px}.study-heading h1{font-size:27px;letter-spacing:1px}.study-heading p:not(.eyebrow){font-size:12px}.study-reading-link{padding:4px 0}.study-hero{padding:23px;gap:13px}.study-hero h2{font-size:19px;line-height:1.7}.study-hero p{font-size:11px}.study-ring{width:105px;height:105px}.study-ring strong{font-size:27px}.study-ring span{font-size:9px}.study-primary{font-size:12px;padding:12px 17px}.study-stats{margin-top:19px}.study-stats strong{font-size:23px}.study-stats span{font-size:10px}.study-section-title>span{font-size:10px;text-align:right;line-height:1.7}.study-plan-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.plan-day{padding:18px 15px}.plan-day h3{font-size:17px}.study-day-button,.study-secondary{font-size:11px}.study-note{padding:15px}.study-note p{font-size:10px}.study-home-link{padding:17px;margin-bottom:18px}.study-home-link small{font-size:11px}.quiz-top>span{font-size:10px}.quiz-top .back-link{font-size:11px}.quiz-question{padding:36px 0 25px}.quiz-question h1{font-size:39px;letter-spacing:7px}.quiz-question .eyebrow{font-size:8px}.quiz-option{padding:16px 14px;gap:11px;font-size:13px;min-height:72px}.option-letter{width:25px;height:25px}.quiz-keyboard{display:none}.quiz-actions{justify-content:center}.quiz-actions .study-primary{width:100%}.quiz-feedback{padding:19px 17px}.feedback-heading{flex-wrap:wrap;gap:7px}.feedback-heading>span{font-size:9px}.feedback-footer{align-items:center}.feedback-footer>span{font-size:9px}.feedback-footer .study-text-button{white-space:nowrap;font-size:10px}.quiz-completion{padding:28px 0}.quiz-completion h1{font-size:25px}.quiz-save-note{font-size:9px}}
@media(max-width:430px){.study-ring{display:none}.study-hero h2{font-size:21px}.study-heading h1{font-size:25px}.study-section-title p{font-size:11px}.plan-day-top{gap:3px}.plan-day-top small{font-size:8px}.plan-day h3{font-size:16px;gap:4px}.plan-day summary{font-size:10px}.plan-day summary span{font-size:8px}.study-hero .study-primary{width:100%}.quiz-option{font-size:12px;gap:10px}.quiz-question h1{font-size:38px}.quiz-progress-row>span{font-size:11px}.completion-stats strong{font-size:25px}}
.study-settings{margin-bottom:24px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:25px 28px}.study-settings .study-section-title{margin:0 0 21px}.study-settings .study-section-title h2{font-size:17px}.study-count-row{display:flex;gap:13px;align-items:center;flex-wrap:wrap}.study-count-row>label{font-size:13px;color:#7b8d70}.study-count-input{display:flex;align-items:center;border:1px solid #dbe3d2;border-radius:7px;background:#fbfcf8;padding:8px 12px;gap:12px}.study-count-input input{width:65px;border:0;background:transparent;color:#335c43;font-size:23px;text-align:center;line-height:1.6;appearance:textfield}.study-count-input input::-webkit-inner-spin-button{appearance:none}.study-count-input>span{font-size:12px;color:#9aa78d}.study-count-save{border:1px solid #dae3d0;background:#f3f6ed;color:#698457;padding:10px 14px;border-radius:6px;font-size:12px}.study-count-presets{display:flex;gap:8px;flex-wrap:wrap;margin:13px 0 23px}.study-count-presets button{border:1px solid #e1e7d8;border-radius:5px;background:#fff;color:#91a07e;padding:7px 14px;font-size:11px}.study-count-presets button[aria-pressed="true"]{background:#eaf0df;border-color:#adbf96;color:#55773f}.study-scope-label{font-size:12px;color:#819371;margin-bottom:11px}.study-scope-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.study-scope-options button{border:1px solid #e0e6d7;background:#fafbf7;border-radius:8px;padding:15px 18px;color:#6c845b;display:flex;justify-content:space-between;align-items:center;gap:8px}.study-scope-options button span{font-size:13px}.study-scope-options button small{font-size:11px;color:#a0ad93}.study-scope-options button[aria-pressed="true"]{border-color:#88a26f;background:#eef4e6;color:#3d6737;box-shadow:0 0 0 1px #88a26f15}.study-settings .study-order-bar{margin:21px 0 0;background:transparent;border:0;padding:0}.study-settings-hint{font-size:11px;color:#a0ad91;line-height:1.9;margin:17px 0 0}.study-resume-button{display:inline-block;margin-left:14px;border:0;background:none;border-bottom:1px solid #c4d3b7;font-size:11px;color:#708961;padding:9px 0;line-height:1.8}.study-manage-list{display:block!important;max-height:330px;overflow:auto}.study-manage-list>div{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:11px 0;border-bottom:1px solid #e9e5d7}.study-manage-list>div:last-child{border-bottom:0}.study-manage-list>div>span{font-size:13px;color:#8a794f}.study-manage-list small{display:block;font-size:10px;color:#a9a183;margin-top:4px}.study-manage-list button{font-size:11px;white-space:nowrap;background:#fff;border:1px solid #dfd7bf;color:#998556;border-radius:5px;padding:7px 10px}.study-manage-list>p{color:#a99f86;font-size:12px}.study-excluded-list{background:#f5f5ee;border-color:#e1e3d6}.quiz-delete-row{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin:24px 0 0;padding-top:17px;border-top:1px solid var(--line)}.quiz-delete-button{padding:6px 10px;border:1px solid #e0d5c7;border-radius:5px;color:#a28c72;background:#fffdf9;font-size:11px}.quiz-delete-button:hover{background:#f4ecdf;color:#9c7650}.quiz-delete-row>span{font-size:10px;color:#a7ae9b}
@media(max-width:760px){.study-settings{padding:21px 18px}.study-count-row{gap:10px}.study-count-input{gap:7px;padding:6px 10px}.study-count-input input{font-size:22px;width:49px}.study-count-input>span{font-size:11px}.study-count-save{font-size:11px;padding:9px 10px}.study-count-presets{gap:6px}.study-count-presets button{padding:7px 12px}.study-scope-options{gap:8px}.study-scope-options button{padding:13px 8px;display:flex;flex-direction:column;gap:7px}.study-scope-options button span{font-size:12px}.study-scope-options button small{font-size:10px}.study-settings .study-order-bar{margin-top:19px}.study-settings-hint{font-size:10px}.study-resume-button{display:block;margin-left:0;margin-top:11px}.study-manage-list>div>span{font-size:12px}.study-manage-list button{font-size:10px}.quiz-memory{align-items:flex-start}.quiz-memory>span{font-size:9px}.quiz-delete-row{gap:8px}.quiz-delete-row>span{font-size:9px}}