/* A quiet reading desk, using the portfolio's typography and colour tokens. */
.room-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.desk-launch{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:0 0 24px;padding:18px 22px;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:14px;background:#ffffffa6}
.desk-launch p{margin:4px 0 0;color:var(--muted);font-size:13px}.desk-launch strong{font-size:15px;font-weight:550}
.task-actions .start-learning{color:var(--accent);font-weight:550;margin-right:10px}
html:has(#learning-room[open]){overflow:hidden}
#learning-room{max-width:none;max-height:none;width:100%;height:100%;inset:0;margin:0;padding:0;border:0;background:var(--bg);color:var(--ink);overflow:hidden;font-family:inherit}
#learning-room::backdrop{background:#14233166}
.room-shell{display:flex;flex-direction:column;height:100%;min-height:0}
@media(prefers-reduced-motion:no-preference){#learning-room[open] .room-shell{animation:study-desk-open 240ms ease-out both}}
@keyframes study-desk-open{from{opacity:.8;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.room-header{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 24px;border-bottom:1px solid var(--line);background:#ffffffe8;flex-shrink:0}
.room-header h2{margin:4px 0 0;font-size:19px;letter-spacing:-.02em;line-height:1.4}.room-header .eyebrow{font-size:10px;letter-spacing:.12em}.room-header .room-actions{flex-shrink:0}
.room-status{font-size:12px;color:var(--muted)}.room-status.error{color:var(--accent);font-weight:600}
.room-grid{display:grid;grid-template-columns:minmax(320px,.85fr) minmax(400px,1.4fr);flex:1;min-height:0}
.room-notebook{overflow:auto;padding:24px;overscroll-behavior:contain;border-right:1px solid var(--line)}
.room-section{margin-bottom:24px}.room-section h3{font-size:15px;margin:0 0 12px}.room-section p,.room-section li{font-size:14px;line-height:1.8}.room-section p{margin:8px 0}.room-section ol{padding-left:22px}.room-section li{padding:3px 0 3px 3px}
.room-task{border:1px solid var(--line);background:#fff8;padding:18px;border-radius:12px;margin-bottom:22px}.room-task p{font-size:14px;line-height:1.8;white-space:pre-wrap;margin:10px 0 0}.room-task small{color:var(--muted)}
.room-section details{border-top:1px solid var(--line);padding-top:12px}.room-section summary{cursor:pointer;color:var(--accent);font-size:13px}
.question-submission{margin:16px 0;padding:15px;border:1px solid color-mix(in srgb,var(--accent) 30%,var(--line));border-radius:12px;background:color-mix(in srgb,var(--accent) 4%,#fff)}.question-submission-head{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}.question-submission-links{display:flex;gap:10px;flex-wrap:wrap;font-size:12px}.question-submission-links a{color:var(--accent)}.question-prompt{font-weight:550;white-space:pre-wrap}.question-submit-row{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.question-image-picker{position:relative;overflow:hidden;cursor:pointer}.question-image-picker input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.question-image-picker:focus-within{outline:2px solid var(--accent);outline-offset:2px}.question-grade-result{margin-top:12px}.grade-card{padding:13px;border-radius:9px;border:1px solid var(--line);background:#fff}.grade-card[data-verdict=correct]{border-color:#8fbf9f;background:#f3faf4}.grade-card[data-verdict=partial],.grade-card[data-verdict=needs_review]{border-color:#d8b76c;background:#fffaf0}.grade-card[data-verdict=incorrect]{border-color:#d69a9a;background:#fff6f6}.grade-score{display:flex;align-items:baseline;gap:7px;margin-bottom:6px}.grade-score strong{font-size:22px}.grade-card p{margin:7px 0}.grade-card ul{margin:5px 0;padding-left:20px}.grade-card pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:180px;overflow:auto;font:12px/1.6 var(--study-font,Arial,sans-serif);padding:9px;background:var(--bg);border-radius:7px}
.room-field{display:block;margin:16px 0;color:var(--ink);font-size:13px;font-weight:550}.room-field small{display:block;font-weight:400;color:var(--muted);margin:5px 0;line-height:1.65}
.room-field textarea{display:block;width:100%;resize:vertical;min-height:120px;margin-top:9px;padding:13px;border:1px solid var(--line);border-radius:9px;background:#ffffffbf;color:var(--ink);font:400 14px/1.8 var(--study-font,Arial,sans-serif)}
.room-field textarea.tall{min-height:220px}.room-check{display:flex;gap:10px;font-size:13px;line-height:1.65;margin:12px 0;align-items:flex-start}.room-check input{margin-top:4px;accent-color:var(--accent);flex-shrink:0}
.project-guide{margin:0 0 24px;padding:18px;border:1px solid color-mix(in srgb,var(--accent) 30%,var(--line));border-radius:12px;background:color-mix(in srgb,var(--accent) 5%,#fff)}.project-guide header h3{margin:6px 0 16px;font-size:17px}.project-guide>div>strong{display:block;margin-bottom:9px;font-size:13px}.project-guide ul,.project-guide ol{margin:0;padding-left:20px}.project-guide li,.project-guide p{font-size:12px;line-height:1.7}.project-prerequisites,.project-first30,.project-phases{margin-bottom:18px}.project-first30 ol{display:grid;gap:8px;list-style:none;padding:0}.project-first30 li{display:grid;grid-template-columns:74px 1fr;gap:8px}.project-first30 li>span{color:var(--accent);font-weight:650}.project-first30 small,.project-phases small{display:block;margin-top:3px;color:var(--muted);line-height:1.55}.project-phases ol{display:grid;gap:10px;list-style:none;padding:0}.project-phases li{padding:11px 12px;border-left:2px solid color-mix(in srgb,var(--accent) 50%,var(--line));background:#fff9}.project-phases h4{margin:0 0 4px;font-size:12px}.project-phases p{margin:0}.project-guide details{margin:4px 0 14px;padding-top:10px;border-top:1px solid var(--line)}.project-guide summary{cursor:pointer;color:var(--accent);font-size:12px}.project-reader-guide strong{color:var(--accent)}
.room-reader{display:flex;flex-direction:column;overflow:hidden;min-height:0;padding:20px 24px;background:#edf1f599}
.reader-tools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;flex-shrink:0}.reader-tools select{width:100%;font-size:13px;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
.reader-tools label{font-size:12px;color:var(--muted)}.reader-tools .resource-picker{flex:1;min-width:0}.reader-tools .local-picker{position:relative;display:inline-flex;cursor:pointer;overflow:hidden;flex-shrink:0}.local-picker input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%}.local-picker:focus-within{outline:2px solid var(--accent);outline-offset:2px}
.reader-scope{font-size:12px;line-height:1.7;color:var(--muted);margin:12px 0;flex-shrink:0}.reader-scope strong{color:var(--accent);font-weight:500}
.reader-view{flex:1;min-height:220px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:auto;position:relative;overscroll-behavior:contain}
.reader-view iframe{width:100%;height:100%;min-height:400px;border:0;display:block;background:#fff}.reader-intro{max-width:700px;padding:32px;margin:0 auto}.reader-intro h3{font-size:23px;line-height:1.4;margin:10px 0 20px;letter-spacing:-.03em}.reader-intro h4{font-size:15px;margin:22px 0 10px}.reader-intro p,.reader-intro li{font-size:14px;line-height:1.9}.reader-intro ol{padding-left:22px}.reader-intro .notice{font-size:12px;line-height:1.8;margin:20px 0}.reader-text{white-space:pre-wrap;overflow-wrap:anywhere;font:14px/1.9 var(--study-font,Arial,sans-serif);margin:0;padding:28px}
.reader-links{display:flex;align-items:center;gap:15px;flex-wrap:wrap;flex-shrink:0;padding:12px 0 0;font-size:12px}.reader-links a{color:var(--accent)}
.reader-message{font-size:12px;color:var(--accent);margin:8px 0 0;line-height:1.6;min-height:18px}.room-mobile-switch{display:none}.room-saved-list{display:grid;gap:8px;margin:16px 0}.room-saved-list button{text-align:left;font-size:13px}
.room-close{min-height:42px}.room-bottom{padding-top:16px;border-top:1px solid var(--line)}.room-bottom p{font-size:12px;color:var(--muted);line-height:1.7}
.room-session-backup{margin-top:18px}.room-session-backup textarea{font:12px/1.6 monospace;min-height:140px;width:100%}
.assignment-location-item{display:grid;flex:1 1 240px;min-width:0;gap:8px;padding:10px;border:1px solid var(--line);border-radius:10px;background:#ffffffb8}
.assignment-location-item .assignment-question{justify-self:start;max-width:100%;overflow:hidden;text-align:left;text-overflow:ellipsis;white-space:nowrap}
.handwriting-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.handwriting-picker{position:relative;overflow:hidden;cursor:pointer;font-size:10px!important;padding:7px 9px!important}.handwriting-picker input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.handwriting-picker:focus-within{outline:2px solid var(--accent);outline-offset:2px}
.handwriting-slot{min-height:34px}.handwriting-slot .handwriting-status{display:block;max-width:none;overflow:visible;color:var(--muted);font-size:10px;line-height:1.5;white-space:normal}.handwriting-slot .handwriting-status.error{color:var(--accent)}
.handwriting-thumbnails{display:flex;gap:7px;flex-wrap:wrap}.handwriting-thumbnails button{width:46px;height:46px;padding:0;overflow:hidden;border:1px solid var(--line);border-radius:7px;background:#fff;cursor:zoom-in}.handwriting-thumbnails img{display:block;width:100%;height:100%;object-fit:cover}
#handwriting-viewer{width:min(980px,94%);max-width:none;max-height:92%;padding:0;overflow:hidden;border:1px solid var(--line);border-radius:16px;background:var(--bg);color:var(--ink)}#handwriting-viewer::backdrop{background:#14233199;backdrop-filter:blur(4px)}
.handwriting-viewer-card{display:flex;max-height:92vh;min-height:300px;flex-direction:column}.handwriting-viewer-card>header{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 22px;border-bottom:1px solid var(--line);background:#fffffff0}.handwriting-viewer-card h2{margin:5px 0 0;font-size:19px}.handwriting-viewer-card>p{margin:0;padding:12px 22px;border-top:1px solid var(--line);color:var(--muted);font-size:11px;line-height:1.6}
.handwriting-gallery{display:grid;min-height:0;overflow:auto;padding:20px;gap:18px;grid-template-columns:repeat(2,minmax(0,1fr))}.handwriting-gallery figure{margin:0}.handwriting-gallery a{display:block;overflow:hidden;border:1px solid var(--line);border-radius:10px;background:#fff}.handwriting-gallery img{display:block;width:100%;max-height:70vh;object-fit:contain}.handwriting-gallery figcaption{padding-top:7px;color:var(--muted);font-size:11px}.handwriting-empty{display:grid;min-height:260px;place-items:center;padding:30px;color:var(--muted);font-size:13px;text-align:center}
@media(max-width:1000px){.room-grid{grid-template-columns:minmax(300px,1fr) minmax(340px,1.1fr)}.room-notebook{padding:20px}.room-reader{padding:18px}.room-header{padding:14px 20px}}
@media(max-width:760px){.room-mobile-switch{display:flex;padding:9px 14px;gap:8px;border-bottom:1px solid var(--line);flex-shrink:0}.room-mobile-switch button{flex:1;min-height:38px}.room-mobile-switch button[aria-pressed=true]{background:var(--ink);color:#fff}.room-grid{display:block;overflow:hidden}.room-notebook,.room-reader{height:100%;border:0;padding:18px}.room-grid[data-pane=notebook] .room-reader{display:none}.room-grid[data-pane=reader] .room-notebook{display:none}.room-header{padding:12px 15px;align-items:flex-start}.room-header h2{font-size:16px}.room-header .room-actions{gap:7px;flex-direction:column;align-items:flex-end}.room-status{font-size:10px;max-width:130px}.reader-intro{padding:22px}.reader-intro h3{font-size:21px}.reader-tools .local-picker{font-size:11px;padding:10px}.desk-launch{padding:15px;align-items:flex-start;flex-direction:column}.reader-view iframe{min-height:350px}.assignment-location-item{flex-basis:100%}.handwriting-gallery{grid-template-columns:1fr;padding:12px}.handwriting-viewer-card>header{padding:14px}.handwriting-viewer-card h2{font-size:16px}}
@media(prefers-reduced-motion:reduce){#learning-room *{scroll-behavior:auto}}

/* A layout-only reading mode: keep the same reader, PDF page and notebook DOM alive. */
.reader-focus-toggle{flex-shrink:0;font-size:12px;min-height:40px}
#learning-room.room-reading-focus .room-grid{display:grid;grid-template-columns:minmax(0,1fr)}
#learning-room.room-reading-focus .room-notebook,
#learning-room.room-reading-focus .room-mobile-switch,
#learning-room.room-reading-focus .reader-scope,
#learning-room.room-reading-focus .reader-directory-tools,
#learning-room.room-reading-focus .reader-directory-status,
#learning-room.room-reading-focus .reader-tools .local-picker{display:none}
#learning-room.room-reading-focus .room-reader{display:flex;padding:12px 20px;height:100%}
#learning-room.room-reading-focus .room-header{padding:9px 20px}
#learning-room.room-reading-focus .room-header .eyebrow{display:none}
#learning-room.room-reading-focus .reader-tools{margin-bottom:10px}
#learning-room.room-reading-focus .reader-view{min-height:180px}
#learning-room.room-reading-focus .reader-links{padding-top:6px}
#learning-room.room-reading-focus .reader-message{margin-top:4px}
@media(max-width:760px){
  .reader-focus-toggle{font-size:11px;padding:9px 12px;min-height:36px}
  .project-guide{padding:14px}.project-first30 li{grid-template-columns:1fr;gap:2px}
  #learning-room.room-reading-focus .room-reader{padding:8px}
  #learning-room.room-reading-focus .room-header{padding:8px 12px;align-items:center}
  #learning-room.room-reading-focus .room-header .room-status:not(.error){display:none}
}