.study-main{max-width:1280px;padding-top:24px}
.study-page-heading{border-bottom:1px solid var(--line);margin-bottom:24px;padding-bottom:16px}
.study-page-heading h1{margin:6px 0 0;font-size:24px}
.study-workspace{display:grid;grid-template-columns:280px minmax(0,1fr);gap:32px;align-items:start}
.study-catalog{min-width:0;position:sticky;top:20px;max-height:calc(100dvh - 40px);overflow:auto;scrollbar-width:thin;padding-right:16px;border-right:1px solid #dce4e0}
.study-catalog>summary{display:none}
#studyLessonNav{display:flex;flex-direction:column;gap:4px}
#studyLessonNav>a,.study-nav-group>summary{display:block;padding:12px 14px;color:#536173;text-decoration:none;font-size:14px;line-height:1.5;font-weight:600;border-radius:4px;overflow-wrap:anywhere}
#studyLessonNav a:hover{background:#edf4f2;color:var(--brand)}
#studyLessonNav a[aria-current=location]{background:#dfede7;color:#176b58;box-shadow:inset 3px 0 #1b7f6b}
.study-nav-group{padding-bottom:8px;border-bottom:1px solid var(--line)}
.study-nav-group>summary{display:list-item;cursor:pointer;margin-left:14px;padding-left:0}
.study-nav-group>summary::marker{color:var(--brand)}
.study-nav-group>div{padding-left:14px}
.study-nav-group a{display:block;font-size:13px;line-height:1.6;padding:10px 12px;text-decoration:none;color:#68738a;border-radius:4px;border-left:1px solid #dce4e0;overflow-wrap:anywhere}
.study-reading{min-width:0;min-height:520px;background:#fff;padding:24px}
.study-reading-header{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:8px}
.study-reading-header p{font-size:12px;color:#68738a;margin:0 0 6px}
.study-reading-header h2{font-size:22px;line-height:1.4;margin:0;font-weight:600;overflow-wrap:anywhere}
.study-reading-header h2:focus{outline:none}
.study-lesson-content{padding:0;min-width:0}
.study-resource-panel>p{margin:0;padding:40px 0;font-size:14px;line-height:1.7;color:#68738a}
@media(max-width:1000px){.study-workspace{grid-template-columns:230px minmax(0,1fr);gap:20px}.study-reading{padding:20px}}
@media(max-width:760px){.study-main{padding:24px 16px}.study-workspace{grid-template-columns:minmax(0,1fr);gap:16px}.study-catalog{position:static;max-height:none;border-right:0;padding-right:0;border-bottom:1px solid var(--line)}.study-catalog>summary{display:list-item;font-size:14px;font-weight:600;color:var(--brand);cursor:pointer;padding:14px 0;line-height:1.5}.study-catalog>summary>span{display:block;color:#68738a;font-size:12px;font-weight:400;margin-top:4px;overflow-wrap:anywhere}.study-catalog nav{max-height:400px;overflow:auto;padding-bottom:12px}.study-reading{padding:20px 16px;min-height:360px}.study-reading-header h2{font-size:20px}}
.study-resource-tabs{display:flex;gap:8px;flex-wrap:wrap;border-bottom:1px solid var(--line);margin-bottom:20px}
.study-resource-tabs button{border:0;border-bottom:2px solid transparent;border-radius:0;background:transparent;padding:10px 12px;color:var(--muted);font-size:14px;min-height:42px}
.study-resource-tabs button[aria-selected=true]{color:var(--brand);border-bottom-color:var(--brand)}
.study-resource-panel{min-width:0;outline-offset:4px}
.study-document-link{display:block;color:var(--brand);padding:12px 0;border-bottom:1px solid var(--line);text-decoration:underline;overflow-wrap:anywhere}
.study-audio{margin:0 0 20px}.study-audio figcaption{margin-bottom:10px;font-size:14px}.study-audio audio{width:100%;max-width:600px}
.study-wheel-view{position:relative;background-color:#d9edf5;background-image:url('https://api-public.ptts.com.vn/storage/logo/background-wheel.png');background-position:center;background-size:cover;background-repeat:no-repeat;padding:76px 16px 16px}
.study-wheel-tools{position:absolute;top:12px;right:12px;display:flex;gap:8px;align-items:center;z-index:3}
.study-wheel-tools button{width:44px;height:44px;padding:0;font-size:24px}
.study-wheel-tools .wheel-fullscreen{font-size:28px}
.study-wheel-tools .wheel-music[aria-pressed=true]{background:#176b58;color:#fff}
.study-wheel-view>.wheel-status{background:#fffffff0;border-radius:4px;padding:8px 12px;width:fit-content;max-width:100%;margin:0 auto}
.study-wheel-view>.study-wheel-lists{background:#fffffff0;padding:16px;color:var(--text)}
.study-wheel-stage{width:min(100%,500px);aspect-ratio:1;position:relative;margin:16px auto}
.study-wheel-stage canvas{display:block;width:100%;height:100%}
.study-wheel-pointer{position:absolute;top:0;left:50%;transform:translateX(-50%);width:34px;height:42px;z-index:2;filter:drop-shadow(0 3px 2px #17203340)}
.study-wheel-pointer::before{content:'';position:absolute;inset:0;background:#fff;clip-path:polygon(0 0,100% 0,100% 35%,50% 100%,0 35%)}
.study-wheel-pointer::after{content:'';position:absolute;inset:3px 4px 6px;background:#193c31;clip-path:polygon(0 0,100% 0,100% 30%,50% 100%,0 30%)}
.study-wheel-logo{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:20%;height:20%;object-fit:contain;background:white;border:6px solid white;border-radius:50%;pointer-events:none}
.study-resource-panel .wheel-status{text-align:center;color:var(--text);font-size:14px;line-height:1.6}
.study-wheel-controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;margin:20px 0}
.study-wheel-controls .wheel-music{width:44px;height:44px;padding:0;font-size:24px}
.study-wheel-controls .wheel-music[aria-pressed=true]{background:#176b58;color:#fff}
.wheel-music-error{flex-basis:100%;margin:0;padding:8px;background:#fff;color:#b42318;text-align:center;font-size:14px}
.study-wheel-controls .wheel-spin{min-width:140px;min-height:44px;font-size:16px;padding:10px 24px}
.study-wheel-controls .wheel-reset{width:44px;height:44px;padding:0;font-size:24px}
.study-wheel-controls .wheel-fullscreen{width:44px;height:44px;padding:0;font-size:28px}
.study-wheel-view:fullscreen,.study-wheel-view.is-expanded{color:var(--text);padding:76px 20px 20px;overflow:auto;display:flex;flex-direction:column;align-items:center;justify-content:center}
.study-wheel-view.is-expanded{position:fixed;inset:0;z-index:1000;height:100dvh}
.study-wheel-view:fullscreen>.wheel-status,.study-wheel-view.is-expanded>.wheel-status{margin:0;font-size:16px}
.study-wheel-view:fullscreen>.study-wheel-stage,.study-wheel-view.is-expanded>.study-wheel-stage{width:min(100%,calc(100dvh - 220px),760px);flex-shrink:0;margin:12px auto}
.study-wheel-view:fullscreen>.study-wheel-controls,.study-wheel-view.is-expanded>.study-wheel-controls{margin:8px 0}
.study-wheel-view:fullscreen>.study-wheel-lists,.study-wheel-view.is-expanded>.study-wheel-lists{display:none}
html.study-wheel-expanded{overflow:hidden}
.study-wheel-lists{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;border-top:1px solid var(--line);padding-top:16px}
.study-wheel-lists summary{font-size:14px;cursor:pointer;line-height:1.6;font-weight:600;padding:8px 0}
.study-wheel-lists ol{margin:8px 0;padding-left:24px;max-height:240px;overflow:auto}
.study-wheel-lists li{font-size:13px;line-height:1.7;padding:4px 0;overflow-wrap:anywhere}
.study-question-dialog{width:min(720px,calc(100% - 24px));max-height:90dvh;overflow:auto;padding:24px;border:1px solid #d4e3dc;border-radius:8px;color:var(--text);background:#fff}
.study-question-dialog::backdrop{background:#10251fa6}
.study-question-dialog h2{font-size:26px;line-height:1.5;margin:0 0 16px;overflow-wrap:anywhere}
.study-question-answer{white-space:pre-wrap;overflow-wrap:anywhere;background:#edf4f2;color:#183e32;border-left:3px solid var(--brand);padding:16px;font-size:22px;line-height:1.7}
.study-question-actions{display:flex;flex-wrap:wrap;gap:8px;border-top:1px solid var(--line);padding-top:16px;margin-top:20px}
.study-question-actions button{padding:10px 14px;min-height:40px}
@media(max-width:600px){.study-lessons>details>summary{padding:16px 8px;font-size:14px}.study-lesson-content{padding:16px}.study-resource-tabs{gap:0}.study-resource-tabs button{font-size:13px;padding:10px}.study-wheel-lists{grid-template-columns:1fr;gap:12px}.study-question-dialog{padding:16px}.study-question-dialog h2{font-size:24px}.study-question-answer{font-size:20px}}