.study-tools{display:grid;grid-template-columns:1fr;gap:13px;margin-top:14px}.study-tool-card{padding:22px}.study-tool-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:16px}.study-tool-head h2,.study-tool-head p{margin:0}.study-tool-head p{margin-top:4px;color:var(--muted)}.plan-list,.forget-list,.lesson-note-list{display:grid;gap:9px}.plan-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;padding:13px;border-radius:16px;background:var(--soft)}.plan-day{width:48px;height:48px;display:grid;place-items:center;align-content:center;border-radius:14px;background:#dfeaff;color:var(--blue)}.plan-day b,.plan-day small,.plan-row strong,.plan-row span{display:block}.plan-day b{font-size:1.25rem;line-height:1}.plan-row span{color:var(--muted);font-size:.82rem}.plan-row em{color:var(--blue);font-style:normal;font-weight:900}.forget-row{display:grid;grid-template-columns:auto minmax(0,1fr);gap:11px;padding:12px;border:1px solid #f2c7ca;border-radius:15px;background:#fff6f6}.forget-row>span{width:34px;height:34px;display:grid;place-items:center;border-radius:11px;background:#ffe0e3;color:#b52f3d}.forget-row b,.forget-row small{display:block}.forget-row small{color:var(--muted)}.forget-actions{display:flex;gap:8px;margin-top:13px}.lesson-notes{grid-column:1/-1}.lesson-note-list{grid-template-columns:repeat(3,minmax(0,1fr))}.lesson-note{position:relative;padding:16px;border:1px solid var(--line);border-radius:17px;background:var(--soft);cursor:pointer}.lesson-note .delete-icon{position:absolute;right:10px;top:10px}.lesson-note small,.lesson-note b,.lesson-note p{display:block}.lesson-note small{padding-right:38px;color:var(--blue);font-weight:800}.lesson-note b{margin-top:6px}.lesson-note p{display:-webkit-box;margin:7px 0 0;color:var(--muted);line-height:1.45;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}html[data-theme="dark"] .plan-row,html[data-theme="dark"] .lesson-note{background:#14243b}html[data-theme="dark"] .forget-row{border-color:#613742;background:#2b1d28}
@media(max-width:760px){.study-tools{grid-template-columns:1fr}.lesson-notes{grid-column:auto}.study-tool-card{padding:17px}.lesson-note-list{grid-template-columns:1fr}.plan-row{grid-template-columns:auto minmax(0,1fr)}.plan-row>em{grid-column:2}.forget-actions{flex-direction:column}.forget-actions .button{width:100%}}
.lesson-note-reader{position:fixed;inset:0;z-index:110;padding:24px;background:rgba(4,10,20,.78);overflow-y:auto;backdrop-filter:blur(10px)}.lesson-note-reader[hidden]{display:none}.lesson-note-reader>section{width:min(920px,100%);min-height:calc(100dvh - 48px);margin:auto;padding:clamp(20px,4vw,38px);border-radius:26px;background:var(--strong);color:var(--ink)}.lesson-note-reader header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.lesson-note-reader header h2{margin:0;font-size:clamp(2rem,5vw,3.5rem)}.lesson-note-reader header button{width:48px;height:48px;flex:none;border:0;border-radius:15px;background:var(--soft);color:var(--ink);font-size:2rem;cursor:pointer}.lesson-note-content{margin:24px 0;padding:clamp(20px,4vw,36px);border:1px solid #ddd2bd;border-radius:18px;background:#fffdf7;color:#29251f;white-space:pre-wrap;font-family:Georgia,serif;font-size:1.08rem;line-height:1.8}.lesson-note-pages h3{margin-top:28px}.lesson-note-pages>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.lesson-note-pages button{position:relative;min-height:210px;padding:8px;border:1px solid var(--line);border-radius:17px;background:var(--soft);cursor:zoom-in;overflow:hidden}.lesson-note-pages img{width:100%;height:190px;display:block;border-radius:11px;object-fit:contain}.lesson-note-pages span{position:absolute;left:14px;bottom:14px;padding:5px 9px;border-radius:999px;background:rgba(5,18,38,.78);color:#fff;font-weight:800}.lesson-note-files{display:grid;gap:8px;margin-top:18px}.lesson-note-files a{padding:13px;border:1px solid var(--line);border-radius:14px;color:var(--blue);font-weight:800;text-decoration:none}
@media(max-width:620px){.lesson-note-reader{padding:0}.lesson-note-reader>section{min-height:100dvh;border-radius:0;padding:18px 12px}.lesson-note-reader header button{width:42px;height:42px}.lesson-note-content{margin:17px 0;padding:20px 16px}.lesson-note-pages>div{grid-template-columns:1fr}.lesson-note-pages button{min-height:70vh}.lesson-note-pages img{height:calc(70vh - 16px)}}
.lesson-note-search{height:54px;display:flex;align-items:center;gap:10px;margin:0 0 16px;padding:0 15px;border:1px solid var(--line);border-radius:16px;background:var(--soft);color:var(--blue)}.lesson-note-search:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px rgba(73,133,240,.15)}.lesson-note-search>span{font-size:1.5rem;line-height:1}.lesson-note-search input{min-width:0;flex:1;border:0;outline:0;background:transparent;color:var(--ink);font:inherit;font-weight:700}.lesson-note-search input::placeholder{color:var(--muted)}.lesson-note-search button{width:34px;height:34px;border:0;border-radius:10px;background:var(--line);color:var(--ink);font-size:1.25rem;cursor:pointer}.lesson-note-search button[hidden]{display:none}@media(max-width:620px){.lesson-note-search{height:48px;margin-bottom:12px}.study-tool-head{flex-wrap:wrap}.study-tool-head .button{width:100%}}