/* Shared reading and practice, using the selected companion's palette. */
.study-sheet { width: min(1140px, 96vw); max-width: 1140px; padding: 28px; display: block; overflow-x: hidden; overflow-y: auto; overscroll-behavior: contain; }
.study-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 22px; }
.study-heading h2 { font-family: Georgia, serif; font-size: clamp(24px, 3vw, 34px); font-weight: 400; line-height: 1.25; margin: 7px 0 10px; overflow-wrap: anywhere; }
.study-heading p, .study-link-picker p, .study-bottom p, .study-shared-note { color: var(--muted); font-size: 13px; }
.study-heading > button { flex-shrink: 0; }
.study-tabs { display: flex; border-bottom: 1px solid var(--line); gap: 18px; margin-bottom: 24px; }
.study-tabs button { border: 0; border-bottom: 3px solid transparent; padding: 12px 5px; min-height: 48px; background: transparent; color: var(--muted); font-weight: 600; }
.study-tabs button[aria-selected="true"] { color: var(--accent-strong); border-bottom-color: var(--accent); }
.study-tabs span { display: inline-block; min-width: 25px; padding: 1px 7px; margin-left: 5px; background: var(--accent-soft); color: var(--accent-strong); border-radius: 5px; font-size: 12px; }
.study-source { display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.study-source > span { color: var(--accent-strong); font-size: 11px; text-transform: uppercase; letter-spacing: .09em; }
.study-source strong { font-size: 15px; font-weight: 600; }
.study-map-choices { display: flex; flex-wrap: wrap; gap: 8px; margin-block: 20px; }
.study-link-picker { padding: 15px 0; border-block: 1px solid var(--line); margin-top: 24px; }
.study-link-picker summary { cursor: pointer; color: var(--accent-strong); min-height: 32px; font-size: 13px; }
.study-link-picker label { display: block; font-size: 12px; margin: 12px 0 6px; }
.study-link-picker select, .study-question-tools select { display: block; width: 100%; min-height: 46px; border: 1px solid var(--line); padding: 9px 12px; border-radius: 8px; color: var(--ink); background: var(--paper); font: inherit; }
.study-link-picker .btn { margin-top: 12px; }
.study-bottom, .study-footer, .study-question-nav { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding-top: 22px; }
.study-footer { border-top: 1px solid var(--line); margin-top: 28px; }
.study-empty { padding: 32px 24px; background: var(--accent-wash); border: 1px solid var(--line); border-radius: 12px; }
.study-empty h3 { font-size: 19px; font-weight: 550; margin: 0 0 10px; }
.study-empty p { color: var(--muted); max-width: 670px; }
.study-question-tools { display: flex; align-items: flex-end; justify-content: space-between; gap: 22px; margin-bottom: 14px; }
.study-question-tools label { display: block; min-width: 240px; max-width: 100%; font-size: 12px; }
.study-question-tools select { margin-top: 6px; font-size: 14px; }
.study-question-tools p { margin: 0; text-align: right; font-size: 14px; }
.study-question-tools small, .study-question-nav > span { color: var(--muted); font-size: 12px; }
.study-question-list { display: grid; gap: 8px; }
.study-question-row { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 18px; text-align: left; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); color: var(--ink); }
.study-question-row:hover { background: var(--accent-wash); border-color: var(--accent-line); }
.study-question-row small { display: block; color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.study-question-row strong { display: block; font-size: 15px; font-weight: 550; }
.study-question-row em { flex-shrink: 0; color: var(--accent-strong); font-size: 12px; font-style: normal; }
.study-sheet .question-card { margin-top: 18px; }
.study-sheet .map-image-frame img { width: 100%; height: auto; object-fit: contain; }
.study-sheet button:disabled { opacity: .5; cursor: default; }
.block-study-actions, .suggestion-study-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.block-study-actions { margin-top: 8px; }
.suggestion-study-actions { margin-top: 10px; }
@media (max-width: 650px) {
  .study-sheet { width: 100%; max-width: 100%; padding: 18px 14px; }
  .study-tabs { gap: 12px; }
  .study-tabs button { font-size: 13px; }
  .study-question-tools { align-items: stretch; flex-direction: column; gap: 12px; }
  .study-question-tools label { min-width: 0; }
  .study-question-tools p { text-align: left; }
  .study-question-row { padding: 14px; gap: 10px; align-items: flex-start; flex-direction: column; }
  .study-empty { padding: 24px 16px; }
  .study-bottom .btn, .study-footer .btn { width: 100%; }
}