/* Specification parts (F02) and study sets (F03). Studio tokens from design.css; deck/game page conventions. */
.study-app .spec-tools{display:flex;align-items:center;justify-content:space-between;gap:10px 18px;flex-wrap:wrap;margin:-6px 0 14px}
.study-app .spec-tools .quiet-note{font-size:13px;color:var(--mut);margin:0;max-width:560px}
.study-app .spec-tools-actions{display:flex;align-items:center;gap:6px 14px;flex-wrap:wrap}
.study-app .spec-tools-actions .text-btn{font-size:13px!important;min-height:38px;color:var(--ink)}
.study-app .spec-tools-actions .text-btn:hover{color:var(--blue)}

/* The parts list inside a course topic row */
.course-topic.topic-row{flex-wrap:wrap}
.study-app .spec-entries{flex:1 0 100%;order:9;margin:2px 0 -4px;border-top:1px solid #efeff4;padding-top:6px}
.study-app .spec-entries>summary{list-style:none;display:flex;align-items:center;gap:10px;min-height:44px;cursor:pointer;font-size:13px;font-weight:600;color:var(--ink);border-radius:10px;padding:4px 6px;margin:0 -6px}
.study-app .spec-entries>summary::-webkit-details-marker{display:none}
.study-app .spec-entries>summary:hover{color:var(--blue)}
.study-app .spec-summary-count{font-weight:500;color:var(--mut)}
.study-app .spec-entries>summary .spec-chev{margin-left:auto;transition:transform .18s}
.study-app .spec-entries[open]>summary .spec-chev{transform:rotate(90deg)}
.study-app .spec-chev{width:16px;height:16px;flex:none;color:var(--mut)}
.study-app .spec-list{list-style:none;margin:4px 0 6px;padding:0;display:grid;gap:4px}
.study-app .spec-item{border-radius:14px}
.study-app .spec-item.is-open{background:#f6f6fb;box-shadow:inset 0 0 0 1px #e7e5f4}
.study-app .spec-entry{display:grid;grid-template-columns:minmax(64px,auto) minmax(0,1fr) auto 16px;align-items:center;gap:12px;width:100%;text-align:left;background:none;border:0;border-radius:14px;padding:10px 12px;min-height:48px;font-size:14px;color:var(--ink)}
.study-app .spec-entry:hover{background:#f3f2fb}
.study-app .spec-item.is-open>.spec-entry .spec-chev{transform:rotate(90deg);color:var(--blue)}
.study-app .spec-code{display:inline-flex;align-items:baseline;gap:3px;justify-self:start;font:600 12.5px/1.2 var(--font);letter-spacing:.01em;font-variant-numeric:tabular-nums;color:#4c45b8;background:#efeffa;border-radius:8px;padding:5px 8px;white-space:nowrap}
.study-app .spec-code small{font-size:11px;font-weight:500;color:#7a74c4}
.study-app .spec-code.is-empty{background:none;padding:0}
.study-app .spec-title{font-weight:550;line-height:1.35;overflow-wrap:anywhere}
.study-app .spec-meta{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:6px;font-size:12px;color:var(--mut);text-align:right}
.study-app .spec-meta .chip{position:static;transform:none;display:inline-flex;margin:0;font-size:11px;letter-spacing:0;padding:3px 8px;border-radius:999px}
.study-app .spec-flag{display:inline-flex;font-size:11px;font-weight:600;padding:3px 8px;border-radius:999px;background:var(--card2);color:var(--mut)}
.study-app .spec-flag.is-last{background:var(--lime);color:var(--ink)}
.study-app .spec-chooser{padding:4px 12px 14px}
.study-app .spec-modes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:2px 0 8px}
.study-app .spec-mode{display:flex;flex-direction:column;align-items:flex-start;gap:4px;text-align:left;min-height:72px;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:var(--paper);color:var(--ink);transition:border-color .18s,box-shadow .18s}
.study-app .spec-mode:hover:not(:disabled){border-color:#c9c6f6;box-shadow:0 8px 22px #2526370d}
.study-app .spec-mode b{display:flex;align-items:center;gap:8px;font:600 14px/1.25 var(--font)}
.study-app .spec-mode>span{font-size:12px;color:var(--mut);line-height:1.4}
.study-app .spec-mode:disabled{background:#fafafc;opacity:1}
.study-app .spec-mode:disabled b{color:var(--mut)}
.study-app .plus-chip{display:inline-flex;align-items:center;font:650 10.5px/1 var(--font);letter-spacing:.04em;padding:4px 7px;border-radius:999px;background:var(--lilac);color:#4c45b8;white-space:nowrap}
.study-app .spec-note{font-size:12.5px;color:var(--mut);margin:6px 0 0;line-height:1.55}
.study-app .spec-chooser-foot{margin-top:6px}
.study-app .spec-chooser-foot .text-btn{font-size:13px!important;color:var(--blue);padding-left:0}
.study-app .spec-entries>.spec-note{margin:0 0 8px}

/* My courses call-out */
.study-app .study-set-callout{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:22px 0;padding:22px 26px;border:1px solid #dedafa;border-radius:22px;background:#f5f4ff}
.study-app .study-set-callout h2{font-size:24px;font-weight:500;margin:8px 0 6px}
.study-app .study-set-callout p{font-size:14px;max-width:560px}
.study-app .study-set-callout .eyebrow{font-size:10px;color:var(--mut);letter-spacing:.12em}
.study-app .study-set-callout .btn{flex-shrink:0}

/* Study set builder */
.study-app .set-layout{grid-template-columns:minmax(0,1fr) 330px}
.study-app .set-course-tabs{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 16px}
.study-app .set-course-tabs .deck-seg{cursor:pointer}
.study-app .set-topic{background:var(--paper);border:1px solid var(--line);border-radius:15px;padding:6px 14px;margin-bottom:10px}
.study-app .set-topic.is-chosen{border-color:#c9c6f6;box-shadow:inset 3px 0 0 var(--blue)}
.study-app .set-topic-head,.study-app .set-parts li{display:flex;align-items:center;gap:12px}
.study-app .set-topic input[type=checkbox]{width:20px;height:20px;flex:none;accent-color:var(--blue);margin:0}
.study-app .set-topic label{flex:1;display:grid;grid-template-columns:minmax(58px,auto) minmax(0,1fr) auto;align-items:center;gap:10px;min-height:48px;padding:6px 0;cursor:pointer}
.study-app .set-topic-head label b{font-weight:600;font-size:15px;line-height:1.35;color:var(--ink)}
.study-app .set-dock .text-btn{color:#fff;font-size:13px!important;padding:0;min-height:40px;white-space:nowrap;width:auto}.study-app .set-dock .text-btn b{color:var(--lime);margin-right:4px}
.study-app .set-topic label small{font-size:12px;color:var(--mut);display:flex;align-items:center;gap:6px;justify-content:flex-end;text-align:right}
.study-app .set-topic input:disabled+label{cursor:default}
.study-app .set-topic input:disabled+label span:not(.spec-code):not(.plus-chip){color:var(--mut)}
.study-app .set-parts{border-top:1px solid #efeff4;margin:0 -14px;padding:0 14px}
.study-app .set-parts>summary{list-style:none;display:flex;align-items:center;gap:10px;min-height:42px;cursor:pointer;font-size:13px;font-weight:600}
.study-app .set-parts>summary::-webkit-details-marker{display:none}
.study-app .set-parts>summary span{font-weight:500;color:var(--mut)}
.study-app .set-parts>summary .spec-chev{margin-left:auto;transition:transform .18s}
.study-app .set-parts[open]>summary .spec-chev{transform:rotate(90deg)}
.study-app .set-parts ul{list-style:none;margin:0 0 8px;padding:0}
.study-app .set-parts li{border-top:1px solid #f3f3f7}
.study-app .set-parts li label span{font-size:14px;line-height:1.35;overflow-wrap:anywhere}
.study-app .set-summary .set-total{display:flex;align-items:baseline;gap:10px;margin:0 0 6px}
.study-app .set-summary .set-total strong{font:500 46px/1 var(--display);letter-spacing:-.05em;color:var(--ink)}
.study-app .set-summary .set-total span{font-size:13px;color:var(--mut)}
.study-app .set-per-course{list-style:none;margin:0 0 10px;padding:0;font-size:12px;color:var(--mut)}
.study-app .set-per-course li{display:flex;justify-content:space-between;gap:10px;padding:3px 0}
.study-app .set-per-course b{color:var(--ink);font-weight:600}
.study-app .set-summary .chosen-course-list li.is-gone b{color:var(--mut);text-decoration:line-through}
.study-app .set-summary .course-remove{padding:6px;background:transparent;border:0;min-height:34px;width:34px;color:#8c8b9d;flex-shrink:0;display:grid;place-items:center}
.study-app .set-summary .course-remove:hover{background:#f3f1fa;color:#282337}
.study-app .set-actions{display:grid;gap:8px;margin:16px 0 4px}
.study-app .set-actions .btn{width:100%;justify-content:center}
.study-app .set-actions .text-btn{color:var(--mut)}
.study-app .set-msg{font-size:13px;color:var(--ink);background:var(--lilac);border-radius:12px;padding:10px 12px;margin:10px 0 6px}
.study-app .set-msg.is-warn{background:#fff4e0;color:#5c3d07}
.study-app .set-save{border-top:1px solid #efeff4;margin-top:16px;padding-top:14px}
.study-app .set-save label{display:block;font-size:12px;font-weight:600;margin-bottom:6px}
.study-app .set-save>div{display:flex;gap:8px}
.study-app .set-save input{flex:1;min-width:0;min-height:42px}
.study-app .set-save .quiet-note{font-size:11px;margin-top:6px}
.study-app .set-saved{border-top:1px solid #efeff4;margin-top:14px;padding-top:12px}
.study-app .set-saved h3{font-size:14px;letter-spacing:-.02em;margin-bottom:6px}
.study-app .set-saved ul{list-style:none;margin:0;padding:0}
.study-app .set-saved li{display:flex;align-items:center;gap:6px;padding:6px 0}
.study-app .set-saved li>span{flex:1;min-width:0}
.study-app .set-saved b{display:block;font-size:13px;font-weight:600;overflow-wrap:anywhere}
.study-app .set-saved small{font-size:11px;color:var(--mut)}
.study-app .set-saved .text-btn{font-size:12px!important;min-height:34px;color:var(--blue)}
.study-app .set-empty,.study-app .set-loading{padding:26px;border:1px dashed #cfd2db;border-radius:18px;color:var(--mut);font-size:14px}
.study-app .set-empty .btn{margin-top:12px}
.study-app .set-dock{display:none}
.study-app .set-session-bar .topic-mode-heading b{overflow-wrap:anywhere}
.study-app .qtags .set-source{background:var(--ink);color:#fff}

@media(max-width:980px){.study-app .set-layout{grid-template-columns:1fr}.study-app .set-summary{position:static}}
@media(max-width:700px){
  .study-app .spec-tools{margin-top:0}
  .study-app .spec-tools-actions{width:100%}
  .study-app .spec-tools-actions .ghost{margin-left:auto}
  .course-topic.topic-row .spec-entries{grid-column:1/-1}
  .study-app .spec-entry{grid-template-columns:auto minmax(0,1fr) 16px;grid-template-areas:'code title chev' 'code meta chev';row-gap:4px;padding:10px 8px;gap:4px 10px}
  .study-app .spec-entry .spec-code{grid-area:code;align-self:start}
  .study-app .spec-entry .spec-title{grid-area:title}
  .study-app .spec-entry .spec-meta{grid-area:meta;justify-content:flex-start;text-align:left}
  .study-app .spec-entry .spec-chev{grid-area:chev}
  .study-app .spec-entry .spec-code.is-empty{display:none}
  .study-app .spec-chooser{padding:2px 8px 12px}
  .study-app .spec-modes{grid-template-columns:1fr;gap:6px}
  .study-app .spec-mode{min-height:0;padding:11px 13px;flex-direction:row;align-items:center;justify-content:space-between;gap:10px}
  .study-app .spec-mode>span{text-align:right;flex:none}
  .study-app .study-set-callout{flex-direction:column;align-items:flex-start;padding:20px}
  .study-app .set-topic label{grid-template-columns:auto minmax(0,1fr);row-gap:2px;column-gap:10px}
  .study-app .set-topic label small{grid-column:2;justify-content:flex-start;text-align:left}
  .study-app .set-topic label .spec-code.is-empty{display:none}
  .study-app .set-topic label .spec-code.is-empty~*{grid-column:1/-1}
  .study-app .set-dock{display:flex;position:sticky}
  .study-app .set-summary .set-actions .hot{display:none}
}