#coursePanel{--study-ink:#234b40;--study-gold:#ac8b52;--study-paper:#fffdf7;--study-line:#dfe5d8;font-size:14px}
#coursePanel button{min-height:44px}#coursePanel select,#coursePanel textarea,#coursePanel input[type=search],#coursePanel input[type=number]{font:400 16px/1.6 var(--sans,sans-serif);width:100%;max-width:100%;border:1px solid #ccd7c3;background:#fffdf8;border-radius:10px;padding:12px;color:#2e4939;box-sizing:border-box}
#coursePanel select{min-height:48px}#coursePanel label{line-height:1.8}#coursePanel textarea{min-height:120px}#coursePanel h3,#coursePanel h4{overflow-wrap:anywhere}#coursePanel :is(button,summary,a,input,textarea,select):focus-visible{outline:2px solid #a88952;outline-offset:3px}
.study-intro{position:relative;overflow:hidden;background:radial-gradient(ellipse at 100% 0,#58745a80,transparent 60%),linear-gradient(135deg,#183f35,#325844);padding:29px 23px 23px;border-radius:20px;box-shadow:0 14px 30px #1f423315}
.study-intro:before{content:"";position:absolute;inset:-80px -100px auto auto;width:300px;height:300px;border:1px solid #d9c18b21;border-radius:50%;pointer-events:none}.study-intro:after{content:"";position:absolute;width:250px;height:250px;right:-100px;top:-60px;border:1px solid #d9c18b21;border-radius:50%;pointer-events:none}
.study-intro .course-kicker{font-size:11px;letter-spacing:2px}.study-intro h2{font:400 27px/1.65 var(--serif);letter-spacing:.5px;position:relative;margin:15px 0 12px}.study-intro h2 em{font-style:normal;color:#dfcfaa}.study-intro>p{font-size:13px;line-height:1.95}.study-intro .course-summary{margin-top:23px;padding-top:19px}.study-intro .course-summary b{font-size:30px}.study-intro .course-summary span{font-size:11px}
#coursePanel .study-continue{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;text-align:left;padding:13px 14px;margin:21px 0 12px;border:1px solid #d3bd8a70;color:#f2e9d6;background:#ffffff08;border-radius:10px;font-size:14px}.study-continue span{font-size:10px;color:#d4d9be}.study-intro p.study-intro-note{font-size:10px;line-height:1.8;color:#c3cfbc;margin-top:8px}
.study-route{background:#f7f5ec;border:1px solid #e1dfcf;border-radius:14px;margin:19px 0}.study-route>summary{padding:16px;color:#385740;font-size:15px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:10px;align-items:center}.study-route>summary:after{content:"＋";font-size:20px;color:#a68c5a}.study-route[open]>summary:after{content:"−"}.study-route small{font-size:11px;color:#8a927b;margin-left:auto}
.study-placement{padding:0 16px 16px}.study-placement label{display:block;font-size:12px;margin:5px 0 9px;color:#68785d}.study-placement button{margin-top:10px;width:100%}.study-placement p{font-size:11px;line-height:1.8;color:#7a856c}.study-route-grid{padding:0 14px 15px;display:grid;gap:7px}.study-route-grid button{border:1px solid #e0e6d7;border-radius:10px;background:#fffdf8;padding:12px;display:flex;gap:13px;align-items:center;text-align:left}.study-route-grid b{font:400 21px var(--serif);color:#aa8c55}.study-route-grid span{font-size:15px;color:#2f533e}.study-route-grid small{display:block;font-size:11px;margin:4px 0 0;line-height:1.7}.study-route-grid i{font-style:normal;color:#839377;margin-left:auto}.study-route-grid .active{border-color:#608261;background:#edf2e5}
.study-stage{padding:22px 19px}.study-stage .course-stage-number{font-size:11px;letter-spacing:1px;line-height:1.9;display:block}.study-stage h3{font-size:25px;line-height:1.6;margin-top:12px}.study-stage>p{font-size:14px;line-height:1.95}.study-stage-progress{display:flex;justify-content:space-between;gap:10px;font-size:11px;color:#6f8266;margin-top:18px}.study-stage progress{width:100%;height:5px;border:0;accent-color:#547a55;border-radius:6px;display:block;margin:10px 0 18px;overflow:hidden}.study-stage progress::-webkit-progress-bar{background:#e8ebdf}.study-stage progress::-webkit-progress-value{background:#60805b}
#coursePanel .course-levels{margin-top:0}#coursePanel .course-levels button{min-width:88px;padding:10px 12px;font-size:13px}#coursePanel .course-view-tabs button{min-width:84px;font-size:13px}#coursePanel .course-tags span{font-size:11px}#coursePanel .course-label h3{font-size:21px}#coursePanel .course-label small{font-size:10px;text-align:right;line-height:1.7}#coursePanel .course-detail p,#coursePanel .course-detail li,#coursePanel .course-repertoire p,#coursePanel .course-exercise p,#coursePanel .institution-card p,#coursePanel .course-glossary dd{font-size:14px;line-height:1.95}#coursePanel .course-detail{padding:16px}#coursePanel .course-detail summary{font-size:14px;line-height:1.8}#coursePanel .course-detail>button{margin-top:10px}#coursePanel .course-selfcheck label{font-size:14px;padding:12px 0}#coursePanel .course-note p{font-size:12px}#coursePanel .course-tools button{font-size:12px}#coursePanel .course-next{font-size:14px}
.study-lessons{display:grid;gap:12px}.study-lesson{background:var(--study-paper);border:1px solid #dde4d5;border-radius:14px;overflow:hidden}.study-lesson>summary{list-style:none;display:grid;grid-template-columns:26px minmax(0,1fr) auto;align-items:center;gap:10px;padding:18px 14px;cursor:pointer}.study-lesson>summary>span{font:400 20px var(--serif);color:#ab8e56}.study-lesson>summary>b{font-size:15px;line-height:1.8;font-weight:500;color:#294e3c}.study-lesson>summary>small{font-size:10px;color:#8b997e;white-space:nowrap}.study-lesson[open]>summary{background:#eff3e8;border-bottom:1px solid #dde6d4}.study-lesson-body{padding:18px 18px 7px}.study-lesson-body>p{font-size:14px;line-height:2;color:#556c52;margin:0 0 18px}.study-lesson-body h4,.study-piece-detail h4{font-size:14px;font-weight:600;color:#3c5a42;margin:20px 0 9px}.study-lesson-body ol,.study-piece-detail ol{padding-left:23px;margin:0;color:#61735a}.study-lesson-body li,.study-piece-detail li{font-size:14px;line-height:2;margin:10px 0;padding-left:2px}.study-lesson-body .course-listen-check b,.study-piece-detail .course-listen-check b{font-size:12px}.study-lesson-body .course-listen-check p,.study-piece-detail .course-listen-check p{font-size:14px;line-height:1.95}.study-rescue{padding:14px;background:#f6f1e5;border-radius:9px;margin-top:13px}.study-rescue b{font-size:12px;color:#9d7d45;font-weight:500}.study-rescue p{font-size:13px;line-height:1.95;margin:6px 0 0;color:#7e7259}.study-lesson-check{display:flex;align-items:center;gap:10px;padding:18px 0 12px;font-size:13px;color:#58734f;cursor:pointer}.study-lesson-check input{width:18px;height:18px;accent-color:#355b42;flex-shrink:0}
.study-sources{border-top:1px dashed #dce1d2;margin-top:17px;padding-top:9px}.study-sources summary{font-size:12px;color:#718667;cursor:pointer;min-height:36px;display:flex;align-items:center;gap:8px}.study-sources summary span{font-size:10px;color:#9caa8e}.study-sources p{font-size:11px!important;line-height:1.9!important;color:#87927b}.study-sources>div{margin:10px 0;padding-left:10px;border-left:2px solid #dde4ce}.study-sources button{text-align:left;font-size:12px!important;color:#55724b;text-decoration:underline;text-decoration-color:#c4d1b8;text-underline-offset:3px;padding:3px 0;min-height:32px!important;line-height:1.8}.study-sources small{display:block;font-size:10px;color:#849077;line-height:1.9}
.study-quiz{padding:0 0 10px}.study-quiz fieldset{margin:16px 0;border:1px solid #dce4d3;border-radius:13px;background:#fffdf8;padding:13px 17px 17px;min-width:0}.study-quiz legend{font-size:14px;line-height:1.9;color:#3b5940;font-weight:500;padding:0 5px;max-width:100%}.study-quiz label{display:flex;gap:10px;align-items:flex-start;padding:11px 0;font-size:13px;color:#6e7e61;cursor:pointer}.study-quiz input{width:17px;height:17px;margin-top:4px;accent-color:#355d42;flex-shrink:0}.study-quiz-answer{background:#edf3e7;border-radius:8px;padding:12px;font-size:12px;line-height:1.95;color:#55734a;margin:7px 0 0}
.study-select-label{font-size:12px;color:#667f5e;display:block;margin:19px 0 8px}.study-piece-detail{background:#fffdf8;border:1px solid #dce3d2;border-radius:16px;padding:23px 19px;margin:18px 0;scroll-margin-top:20px}.study-piece-detail>h3{font:400 31px/1.5 var(--serif);color:#294e3b;margin:12px 0}.study-version{font-size:12px;line-height:1.95;color:#89927b;border-bottom:1px solid #e7e9df;padding-bottom:17px}.study-entry{padding:17px;background:#f1efdf;border-radius:10px;margin:17px 0 21px}.study-entry small{font-size:10px;color:#a28857;letter-spacing:1px}.study-entry h4{font:400 20px/1.8 var(--serif);margin:7px 0 0;color:#485f3e}.study-piece-detail>.secondary{margin-top:16px;width:100%}.study-piece-detail .course-note{padding:0;border:0;background:none;margin-top:21px}.study-piece-detail .course-note h4{font-size:17px}
.study-practice{background:#fffdf8;border:1px solid #dfe5d6;border-radius:15px;padding:23px 20px;margin:18px 0}.study-practice h3{font:400 24px/1.7 var(--serif);color:#30513c}.study-practice>label{display:block;font-size:12px;color:#7e8d72;margin:18px 0 8px}.study-clock{font:400 58px/1.4 var(--serif);font-variant-numeric:tabular-nums;text-align:center;color:#35573e;padding:25px 0 17px;letter-spacing:3px}.study-timer-actions{display:flex;gap:10px}.study-timer-actions>button{flex:1}.study-journal h3{font:400 21px var(--serif);color:#35513b}.study-journal article{padding:15px 0;border-bottom:1px solid #e1e6d6}.study-journal b{font-size:12px;color:#829474;font-weight:400}.study-journal p{font-size:14px;line-height:1.95;color:#5c7353}.course-note>label[for=practiceMinutes],.course-note>label[for=practiceNote]{display:block;font-size:12px;color:#718565;margin:17px 0 7px}#practiceSave{width:100%;margin-top:13px}
.study-faq{display:grid;gap:9px}.study-faq details{padding:15px 17px;border:1px solid #dfe6d5;background:#fffdf7;border-radius:11px}.study-faq summary{font-size:14px;line-height:1.8;color:#45603f;cursor:pointer}.study-faq p{font-size:14px;line-height:1.95;color:#758669}.study-faq button{font-size:12px}.study-source-card{border:1px solid #e0e4d6;border-radius:13px;background:#fffdf7;padding:18px;margin:12px 0;overflow-wrap:anywhere}.study-source-card>span{font-size:10px;color:#a28b59;letter-spacing:1px}.study-source-card h4{font:400 20px/1.6 var(--serif);margin:8px 0;color:#3b583f}.study-source-card p{font-size:13px;line-height:1.95;color:#738265;margin:7px 0}.study-source-card>small{font-size:10px;line-height:1.9;color:#99a28d}.study-source-card details{margin-top:13px;border-top:1px solid #e7eadd;padding-top:11px}.study-source-card summary{font-size:11px;color:#7d8e70;cursor:pointer}.study-source-card details p{font-size:11px}.course-rank-comparison>label{display:block;font-size:12px;margin:16px 0 9px;color:#738365}
@media(max-width:360px){.study-intro{padding:24px 17px}.study-intro h2{font-size:24px}.study-continue{flex-direction:column;align-items:flex-start!important;gap:5px!important}.study-lesson>summary{grid-template-columns:24px minmax(0,1fr);gap:8px}.study-lesson>summary>small{grid-column:2}.study-lesson-body{padding:16px 14px 7px}.study-stage{padding:19px 15px}.study-stage h3{font-size:23px}#coursePanel .course-label{align-items:flex-start}.study-stage-progress{font-size:10px}.study-clock{font-size:50px}}
@media(prefers-reduced-motion:reduce){#coursePanel *{scroll-behavior:auto!important}}