#materials{margin-top:22px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.card .actions{margin-top:auto}.fieldPair{display:grid;grid-template-columns:1fr 1fr;gap:15px}textarea{font:inherit;border:1px solid #d9e3eb;padding:10px;border-radius:8px;width:100%}#message{color:#627689}#courseError,#uploadError{color:#9b3434}#manageCourses{font-size:12px;display:block;margin-top:20px}
body.reading-guide{overflow:hidden}
.reader{width:calc(100vw - 32px);height:calc(100dvh - 32px);max-width:1600px;max-height:none;padding:0;overflow:hidden;border-radius:16px;background:#f7f9fb}
.reader[open]{display:grid;grid-template-rows:auto auto minmax(0,1fr) auto}
.reader-heading{display:flex;align-items:center;gap:14px;padding:14px 22px;background:white;border-bottom:1px solid var(--line);min-width:0}
.reader-heading img{width:46px;height:46px;border-radius:50%}.reader-heading>div{flex:1;min-width:0}.reader-heading h2{font-size:17px;margin:3px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reader-heading p{margin:0;font-size:12px;color:var(--muted)}.reader-heading>button{flex-shrink:0}
.reader-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 22px;background:white;border-bottom:1px solid var(--line)}
.reader-navigation{display:flex;align-items:center;gap:10px}.reader label{margin:0;font-size:12px;font-weight:600}.reader-navigation input{width:66px;padding:7px}.reader-navigation button{min-width:38px;padding:7px}.reader-zoom{display:flex;align-items:center;gap:8px}.reader .reader-zoom>select{width:auto;margin:0;padding:7px}
.reader-layout{display:grid;grid-template-columns:252px minmax(0,1fr);min-height:0;overflow:hidden}.reader.sidebar-hidden .reader-layout{grid-template-columns:minmax(0,1fr)}.reader.sidebar-hidden .reader-sidebar{display:none}
.reader-sidebar{overflow:auto;overscroll-behavior:contain;padding:20px 16px;border-right:1px solid var(--line);background:white;min-width:0;scrollbar-gutter:stable}
.reader-search-row{display:flex;gap:6px;margin-top:8px}.reader-search-row input{min-width:0;width:100%;padding:8px}.reader-search-row button{padding:7px 10px}.reader-search-results{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:10px;font-size:11px;color:var(--muted)}.reader-search-results button{font-size:11px;padding:5px 8px}#readerSnippet{font-size:12px;line-height:1.6;overflow-wrap:anywhere;margin-top:10px}
.reader-sidebar details{border-top:1px solid var(--line);padding:15px 0}.reader-sidebar summary{font-weight:700;font-size:12px;cursor:pointer;padding:4px 0;list-style-position:outside;margin-left:14px}#readerPageList{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin-top:14px}#readerPageList button{background:#f6f8fa;color:var(--ink);border-color:var(--line);font-size:12px;padding:8px 0;min-height:36px}#readerPageList button[aria-current=page]{background:var(--ink);color:white;border-color:var(--ink);box-shadow:0 0 0 2px #c89e5a50}
#readerOutline{display:grid;gap:4px;margin-top:12px}#readerOutline .outline-entry{background:transparent;color:var(--ink);border:0;text-align:left;font-size:12px;font-weight:400;padding:8px;line-height:1.45}#readerText{white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px;line-height:1.7;padding-top:12px}
.reader-viewport{overflow:auto;overscroll-behavior:contain;scrollbar-gutter:stable;background:#dfe5eb;min-width:0;min-height:0;position:relative;outline-offset:-4px;touch-action:pan-x pan-y pinch-zoom}
#readerPages{display:flex;flex-direction:column;align-items:center;gap:24px;padding:24px;min-width:100%;width:max-content}
.reader-page{position:relative;flex-shrink:0;background:white;box-shadow:0 3px 14px #193b5926;scroll-margin-top:24px;overflow:hidden}.reader-page:before{content:'Page ' attr(data-page);position:absolute;top:45%;width:100%;text-align:center;color:#8d9dad;font-size:14px}.reader-page canvas{display:block;position:relative;z-index:1}.page-watermark{position:absolute;inset:0;display:grid;place-content:center;z-index:2;pointer-events:none;white-space:pre-line;text-align:center;color:#173b592b;font-size:clamp(12px,1.6vw,22px);transform:rotate(-25deg);padding:8%;overflow-wrap:anywhere}
.reader-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:8px 22px;background:white;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}#readerProgress{font-weight:700;color:var(--ink)}.reader-error{margin:40px auto;padding:28px;max-width:480px;background:white;border:1px solid var(--line);border-radius:12px}
@media(max-width:800px){.reader{width:100vw;height:100dvh;max-width:none;border:0;border-radius:0;margin:0}.reader-heading{padding:10px 12px;gap:8px}.reader-heading img{width:34px;height:34px}.reader-heading h2{font-size:14px}.reader-heading .eyebrow{font-size:8px}.reader-heading>button{font-size:12px;padding:8px}.reader-toolbar{padding:8px 12px;gap:8px;flex-wrap:wrap}.reader-toolbar>button{font-size:11px;padding:8px}.reader-layout{grid-template-columns:185px minmax(0,1fr)}.reader-sidebar{padding:12px 10px}#readerPageList{grid-template-columns:repeat(3,minmax(0,1fr))}.reader-footer{padding:8px 12px}.reader-footer>span:last-child{max-width:60%;text-align:right;font-size:10px}.reader-navigation{gap:5px}.reader-zoom{font-size:11px}.reader .reader-zoom>select{font-size:11px}.fieldPair{grid-template-columns:1fr}}
@media(max-width:560px){.reader-layout{position:relative;grid-template-columns:minmax(0,1fr)}.reader-sidebar{position:absolute;top:0;bottom:0;left:0;width:240px;z-index:4;box-shadow:8px 0 25px #173b5926}.reader-zoom{margin-left:auto}}
@media print{body{display:none!important}}
@media(max-width:560px){.reader-toolbar{display:grid;grid-template-columns:1fr auto}.reader-toolbar>button{justify-self:start}.reader-navigation{grid-column:1/-1;grid-row:2;justify-content:center}.reader-zoom{grid-column:2;grid-row:1}}