/* Scoped to the learner's materials screen; other roles keep their existing UI. */
.learner-study{--bg:#f2f1ed;--paper:#fff;--ink:#283431;--muted:#59645f;--accent:#205647;--line:#dedfd9;--mint:#e7eee8;background:var(--bg);grid-template-columns:200px minmax(0,1fr)}
.learner-study .sidebar{padding:24px 16px;background:#fafaf7;gap:10px}.learner-study .brand{font-size:1.25rem;margin-bottom:26px}.learner-study .brand-icon{width:40px;height:44px;border-radius:10px}.learner-study .sidebar nav a{padding:11px 12px}.learner-study .sidebar-note{background:#eeeee7;margin-top:24px}.learner-study .user{padding-top:12px}.learner-study .topbar{height:auto;min-height:66px;padding:10px 24px;justify-content:flex-end}.learner-study .topbar label{margin:0;white-space:nowrap}.learner-study .topbar select{max-width:640px}.learner-study main:not(.login){padding:20px 24px;max-width:none;min-height:0}.learner-study footer{font-size:.75rem;padding:12px 24px}.learner-study .reader{min-width:0}.reader [hidden]{display:none!important}
.reader-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.reader-heading h1{font-size:1.6rem;letter-spacing:0;margin:0}.reader-eyebrow{font-size:.65rem;letter-spacing:.16em;color:var(--muted);margin:0 0 3px}.reader button,.reader select{font-size:.85rem;min-height:42px;padding:7px 12px}.reader :focus-visible{outline:3px solid #976c22;outline-offset:3px}.reader-chapters{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin-bottom:18px}.reader-chapters button{background:transparent;border-color:transparent;border-radius:6px;border-bottom:3px solid transparent}.reader-chapters button[aria-pressed=true]{border-bottom-color:var(--accent);background:#e7eee8;color:var(--accent)}
.reader-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(290px,340px);gap:18px;align-items:start}.reader-ai-hidden .reader-grid{grid-template-columns:minmax(0,1fr)}.reader-book{min-width:0;background:white;border:1px solid var(--line);border-radius:12px;overflow:hidden}.reader-book>h2{font-size:.95rem;padding:16px 18px 0;margin:0}.reader-toolbar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding:12px;border-bottom:1px solid var(--line)}.reader-pages,.reader-tools{display:flex;gap:6px;align-items:center}.reader-pages label{font-size:.75rem;margin:0}.reader-pages input#reader-page{width:56px;padding:7px 4px;text-align:center;font-size:.9rem;min-height:42px}.reader-pages span{font-size:.8rem;white-space:nowrap}.reader-tools select{width:auto;max-width:150px}.reader-status{font-size:.75rem;color:var(--muted);padding:8px 16px;margin:0;overflow-wrap:anywhere}.reader-parts:empty{display:none}.reader-parts{display:flex;gap:8px;padding:10px 16px 0}.reader-parts button[aria-pressed=true]{background:var(--mint);border-color:var(--accent)}
#reader-canvas-area{height:calc(100dvh - 320px);min-height:420px;max-height:1000px;overflow:auto;background:#e9e9e4;padding:16px;overscroll-behavior:contain}#reader-canvas{display:block;background:white;margin:auto;box-shadow:0 2px 8px #20262012;max-width:none}.reader-bottom{display:flex;flex-wrap:wrap;gap:12px;align-items:center;padding:10px 16px}.reader-bottom a{font-size:.8rem}.reader-transcript{padding:10px 16px;border-top:1px solid var(--line);font-size:.85rem}.reader-transcript summary{cursor:pointer}.reader-transcript p{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.9;margin-top:12px;max-height:400px;overflow:auto}.reader-book:fullscreen{border-radius:0;overflow:auto}.reader-book:fullscreen #reader-canvas-area{height:calc(100dvh - 180px);max-height:none}
#reader-tutor{background:#f8f8f5;border:1px solid var(--line);border-radius:12px;padding:18px;min-width:0;position:sticky;top:16px}#reader-tutor h2{font-size:1.05rem;padding-left:10px;border-left:3px solid var(--accent);margin-bottom:16px}.reader-context{font-size:.75rem;color:var(--accent);background:var(--mint);border-radius:8px;padding:8px 10px;font-weight:650}.reader-help{font-size:.75rem;line-height:1.7;color:var(--muted)}#reader-chat{height:clamp(160px,30dvh,370px);overflow-y:auto;overscroll-behavior:contain;margin:16px 0;padding-right:4px}.reader-welcome{padding:20px 6px;color:var(--muted);font-size:.85rem}.reader-welcome p{margin-top:10px}.reader-message{padding:12px;border-radius:10px;background:white;margin-bottom:12px;font-size:.85rem;overflow-wrap:anywhere}.reader-message.user{display:block;padding:12px;margin-top:0;background:#e7eee8;margin-left:16px}.reader-message p{white-space:pre-wrap;margin:6px 0 0;line-height:1.8}.reader-message small{font-size:.7rem}.reader-citation{display:block;border-top:1px solid var(--line);padding-top:7px;margin-top:8px}.reader-suggestions{display:grid;grid-template-columns:1fr 1fr;gap:6px}.reader-suggestions button{font-size:.75rem;padding:8px 4px}#reader-question-form label{font-size:.8rem;margin:14px 0 6px}#reader-question{min-height:94px;font-size:.9rem;line-height:1.6}.reader-send-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;margin-top:10px}.reader-send-row small{font-size:.65rem}.reader-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
[data-contrast=high] .learner-study{--bg:#fff;--ink:#111;--muted:#222;--accent:#124b35;--line:#333;--mint:#e5eee8}[data-contrast=high] .reader-help{color:#111}
@media(min-width:1600px){.reader-grid{grid-template-columns:minmax(0,1fr) 380px}}
@media(max-width:1150px){.learner-study{grid-template-columns:170px minmax(0,1fr)}.learner-study main:not(.login){padding:16px}.reader-grid{grid-template-columns:minmax(0,1fr) 290px;gap:12px}.learner-study .sidebar{padding:20px 12px}.learner-study .brand-sub{font-size:.65rem}.reader-toolbar{padding:8px}.reader-pages label{display:none}}
@media(max-width:950px){.reader-grid{grid-template-columns:minmax(0,1fr)}#reader-tutor{position:static}#reader-chat{height:220px}#reader-canvas-area{height:65dvh;min-height:340px}.reader-suggestions{grid-template-columns:1fr 1fr}.reader-heading h1{font-size:1.35rem}}
@media(max-width:700px){.learner-study{display:block}.learner-study .sidebar{padding:12px 14px;gap:8px}.learner-study .brand{margin:0}.learner-study .sidebar nav{display:flex;flex-direction:row;flex-wrap:wrap;gap:3px}.learner-study .sidebar nav a{font-size:.75rem;padding:8px}.learner-study .sidebar-note,.learner-study .user{display:none}.learner-study .sidebar-settings{margin:0;padding:0}.learner-study .topbar{padding:10px 14px;gap:8px}.learner-study .topbar label{display:none}.learner-study main:not(.login){padding:14px 10px}.reader-chapters{grid-template-columns:repeat(3,minmax(0,1fr));gap:4px}.reader-heading{gap:4px}.reader-heading button{font-size:.75rem}.reader-toolbar{gap:6px}.reader-tools{flex-wrap:wrap}#reader-canvas-area{padding:10px;min-height:300px}.reader-book>h2{padding:12px 12px 0}.reader-grid{gap:12px}}

/* Refined reader header: title and tools share one baseline when space permits. */
.reader-book-header{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;padding:16px 18px;border-bottom:1px solid var(--line);background:#fff}
.reader-book-header #reader-title{flex:1 1 180px;min-width:0;margin:0;padding:0;font-size:.95rem;line-height:1.6;font-weight:650;overflow-wrap:anywhere}
.reader-book-header .reader-toolbar{display:flex;flex:0 1 auto;flex-wrap:wrap;justify-content:flex-start;align-items:center;gap:10px 16px;border:0;padding:0;margin-left:auto}
.reader-book-header .reader-pages{display:flex;align-items:center;gap:4px;background:#f4f5f1;border:1px solid var(--line);border-radius:9px;padding:3px}
.reader-book-header .reader-pages button{width:36px;height:36px;min-height:36px;padding:0;border:0;border-radius:6px;background:transparent;font-size:1.2rem;font-weight:500;line-height:1}
.reader-book-header .reader-pages button:hover:not(:disabled){background:#e2e9e2}
.reader-book-header .reader-pages button:disabled{opacity:.35}
.reader-book-header .reader-pages input#reader-page{width:44px;height:34px;min-height:34px;margin:0;padding:4px;border:1px solid #d5ddd5;border-radius:5px;font-size:.85rem;font-weight:600;line-height:1.2;appearance:textfield;box-shadow:0 1px 2px #263b2f06}
.reader-book-header #reader-page::-webkit-inner-spin-button,.reader-book-header #reader-page::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.reader-book-header #reader-total{padding:0 5px;color:var(--muted);font-size:.8rem;font-variant-numeric:tabular-nums;font-weight:500}
.reader-book-header .reader-tools{gap:8px}
.reader-book-header .reader-tools select,.reader-book-header #reader-fullscreen{height:44px;min-height:44px;margin:0;padding:8px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;font-size:.8rem;font-weight:500;line-height:1.4}
.reader-book-header #reader-fullscreen{gap:7px;white-space:nowrap}
.reader-book-header #reader-fullscreen svg{flex-shrink:0}
.reader-book-header+.reader-parts:empty+.reader-status{padding-top:7px;padding-bottom:7px;background:#fafbf8;font-size:.7rem}
@media(max-width:1150px){.reader-book-header{gap:10px;padding:14px}.reader-book-header #reader-title{flex-basis:100%}.reader-book-header .reader-toolbar{margin-left:0;flex:1;justify-content:space-between}}
@media(max-width:700px){.reader-book-header{padding:12px;gap:10px}.reader-book-header .reader-toolbar{gap:8px}.reader-book-header .reader-tools{gap:6px}.reader-book-header .reader-tools select,.reader-book-header #reader-fullscreen{padding:8px;font-size:.75rem}.reader-book-header .reader-pages{gap:1px}.reader-book-header .reader-pages button{width:30px}.reader-book-header .reader-pages input#reader-page{width:38px}.reader-book-header #reader-total{padding:0 3px}}
[data-contrast=high] .reader-book-header .reader-pages{background:#fff;border-color:#333}[data-contrast=high] .reader-book-header .reader-pages input#reader-page{border-color:#333}

/* Consistent zoom chevron, independent of the browser's native select arrow. */
.reader-book-header .reader-tools select#reader-zoom{
 appearance:none;
 -webkit-appearance:none;
 padding-right:34px;
 background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2359645f' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m7 10 5 5 5-5'/%3E%3C/svg%3E");
 background-repeat:no-repeat;
 background-position:right 11px center;
 background-size:16px 16px;
 cursor:pointer;
}
@media(forced-colors:active){.reader-book-header .reader-tools select#reader-zoom{appearance:auto;-webkit-appearance:auto;background-image:none;padding-right:10px}}