/* Scoped library: deliberately independent of older concept-section styles. */
.concept-intro{padding-block:8px 24px;border-bottom:1px solid var(--line);margin-bottom:24px;position:relative}
.concept-intro h1{white-space:nowrap;max-width:none!important;font-size:clamp(20px,4.8vw,46px)!important;line-height:1.4!important;margin:12px 0 8px!important;letter-spacing:-0.5px}
.concept-intro .lead{font-size:16px!important;max-width:700px;margin-bottom:0;color:var(--muted);line-height:1.85}
.concept-stats{display:none}
.concept-controls{padding:20px;background:var(--card-bg,#fff);border:1px solid var(--line);border-radius:16px;margin:0 0 24px}
.concept-controls label{font-size:14px;font-weight:700;display:block;margin-bottom:8px}
.concept-search-row{display:flex;gap:10px}.concept-search-row input{min-width:0;flex:1;min-height:50px;border-color:var(--line);background:var(--wash);font-size:15px}
.concept-search-row button{flex-shrink:0;font-size:13px}
.concept-categories{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}
.concept-categories button{min-height:44px;padding:7px 13px;border-radius:9px;background:transparent;color:var(--muted);border:1px solid var(--line);font-size:13px;font-weight:400}
.concept-categories button[aria-pressed=true]{background:#234291;border-color:#234291;color:#fff}
.concept-categories button span{margin-inline-start:6px;opacity:.8}
.concept-list-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:24px 0 16px}
.concept-list-heading h2{font-size:18px!important;margin:0!important}.concept-list-heading p{font-size:12px;color:var(--muted);margin:0}
.concept-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start}
.concept-card{display:grid;grid-template-columns:112px minmax(0,1fr);gap:18px;align-items:start;padding:20px;background:var(--card-bg,#fff);border:1px solid var(--line);border-radius:14px;min-width:0;scroll-margin-top:24px}
.concept-card:target{border-color:#3e74fe;box-shadow:0 0 0 3px #3e74fe16}
.concept-card .concept-art{display:block!important;width:112px!important;height:112px!important;max-height:none!important;aspect-ratio:1!important;object-fit:contain;border-radius:12px;margin:0!important;float:none!important}
.concept-copy{min-width:0}.concept-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:11px;color:var(--muted);margin:0 0 6px}
.concept-more-btn{appearance:none;background:#ecf2ff!important;color:#2a50b8!important;border:1px solid #c8d9fc;border-radius:6px;font-size:11px!important;padding:3px 9px!important;min-height:24px!important;cursor:pointer;font-weight:600;transition:all .15s ease}
.concept-more-btn:hover{background:#2a50b8!important;color:#fff!important;border-color:#2a50b8}
.concept-card h3{font-size:17px!important;line-height:1.65!important;margin:0 0 3px!important}.concept-card h3 a{color:var(--ink);text-decoration:none}.concept-card h3 a:hover{text-decoration:underline}
.concept-card .concept-english{font:11px/1.6 Arial,sans-serif;color:var(--muted);text-align:right;margin:0 0 10px;overflow-wrap:anywhere}
.concept-card .concept-definition{font-size:13px!important;line-height:1.95;margin:0 0 10px!important;color:var(--ink)}
.concept-card .concept-example{font-size:12px!important;line-height:1.95!important;background:#f4f7fd;border-radius:5px;padding:9px 11px;margin:0 0 8px!important;color:#364d7b}
.concept-example b{font-size:10px;display:block;color:#637ba8;margin-bottom:2px}
.concept-card details{margin:0!important;padding:0!important;border:0!important;background:none!important;box-shadow:none!important;clear:none}
.concept-card summary{font-size:12px!important;color:var(--link);min-height:36px;padding:5px 0!important;cursor:pointer;line-height:2!important}
.concept-card details p{font-size:12px!important;line-height:1.9!important;margin:8px 0!important}.concept-source{font-size:11px;overflow-wrap:anywhere;display:inline-block;line-height:1.9;padding-block:8px}
.concept-pagination{text-align:center;margin:28px auto;color:var(--muted);font-size:13px}.concept-pagination button{background:white;color:var(--link);font-size:13px}
.concept-empty{padding:35px 20px;text-align:center;border:1px dashed var(--line);border-radius:14px;background:white}.concept-empty h3{font-size:19px}.concept-empty p{font-size:14px}.concept-empty button{font-size:13px}
.concept-research-note{font-size:11px!important;line-height:2;color:var(--muted);margin-top:28px!important;border-top:1px solid var(--line);padding-top:18px}
.concept-card[hidden],[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1500px){.concept-card{grid-template-columns:128px minmax(0,1fr)}.concept-card .concept-art{width:128px!important;height:128px!important}}
@media(max-width:1100px){.concept-list{grid-template-columns:1fr}.concept-card{grid-template-columns:128px minmax(0,1fr)}.concept-card .concept-art{width:128px!important;height:128px!important}}
@media(max-width:600px){.concept-intro{padding-top:0}.concept-intro h1{font-size:clamp(18px,4.7vw,28px)!important}.concept-intro .lead{font-size:15px!important}.concept-controls{padding:14px}.concept-list{gap:12px}.concept-card{padding:16px;gap:12px;grid-template-columns:76px minmax(0,1fr)}.concept-card .concept-art{width:76px!important;height:76px!important;border-radius:10px}.concept-card h3{font-size:16px!important}.concept-card .concept-definition{font-size:12px!important}.concept-card .concept-example,.concept-card details{margin-inline-start:-88px!important}.concept-card .concept-example{margin-top:14px!important}.concept-meta{font-size:9px}.concept-list-heading{align-items:start;flex-direction:column;gap:6px}.concept-list-heading h2{font-size:17px!important}.concept-stats{gap:14px;font-size:11px}.concept-stats span:last-child{display:none}.concept-categories{gap:6px}.concept-categories button{font-size:11px;padding:6px 10px}.concept-search-row input{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}}
@media print{.concept-controls,.concept-pagination{display:none}.concept-card[hidden]{display:grid!important}.concept-list{grid-template-columns:1fr}.concept-card{break-inside:avoid}}
/* Modal dialog for concept details */
.concept-modal{border:none;padding:0;background:transparent;max-width:680px;width:94%;margin:auto;box-shadow:none;overflow:visible}
.concept-modal::backdrop{background:rgba(18,27,51,0.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);animation:fadeIn .2s ease-out}
.concept-modal[open]{animation:slideUp .25s cubic-bezier(0.16,1,0.3,1)}
.concept-modal-box{background:#ffffff;border-radius:24px;padding:30px 34px;position:relative;border:1px solid rgba(0,0,0,0.06);box-shadow:0 30px 60px -15px rgba(22,34,68,0.3);max-height:85vh;overflow-y:auto;scrollbar-width:none;-ms-overflow-style:none}
.concept-modal-box::-webkit-scrollbar{display:none;width:0;height:0}
.concept-modal-close{position:absolute;top:22px;left:24px;width:36px;height:36px;border-radius:50%;background:#f2f5fb!important;border:none;color:#506288!important;font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}
.concept-modal-close:hover{background:#e3e9f6!important;color:#182b52!important;transform:scale(1.05)}
.concept-modal-close{width:44px;height:44px}
.concept-more-btn{min-height:44px!important}
@media(max-width:480px){
  .concept-modal-box{padding:60px 20px 24px;max-height:85dvh}
  .concept-modal-close{top:10px;left:12px}
  .concept-modal-header{gap:12px;align-items:flex-start}
  .concept-modal-header .modal-art{width:64px;height:64px;border-radius:14px}
  .concept-modal-header .modal-meta{flex-wrap:wrap;gap:6px}
  .concept-modal-header #modal-concept-group{white-space:nowrap}
  .concept-modal-header #modal-concept-title{font-size:20px}
}
.concept-modal-header{display:flex;align-items:center;gap:20px;margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid #edf2f9}
.modal-art{width:88px;height:88px;border-radius:18px;background:#f5f7fc;object-fit:contain;flex-shrink:0}
.modal-titles{min-width:0;flex:1}
.modal-meta{display:flex;align-items:center;gap:12px;font-size:12.5px;margin-bottom:8px}
#modal-concept-group{background:#eef4ff;color:#234291;padding:3px 10px;border-radius:8px;font-weight:600}
#modal-concept-english{font-family:Arial,sans-serif;color:#6b7c9f;font-size:12.5px;font-weight:500}
#modal-concept-title{font-size:22px;margin:0;color:#182b52;line-height:1.4;letter-spacing:-0.4px}
.concept-modal-body{display:flex;flex-direction:column;gap:18px}
.modal-section{font-size:14px;line-height:2.05;color:#2c3e66}
.modal-section p{margin:6px 0 0}
.modal-label{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;color:#5a6e97;letter-spacing:0.2px;margin-bottom:3px}
.modal-highlight{background:#f4f8fe;padding:15px 18px;border-radius:12px;color:#183670}
.modal-highlight .modal-label{color:#2a57c7}
.modal-deep-dive{background:#faf6fd;padding:15px 18px;border-radius:12px;color:#37245c}
.modal-deep-dive .modal-label{color:#7943ce}
.modal-source-box{background:#f9fbfd;border:1px solid #e2eaf6;padding:12px 18px;border-radius:12px;margin-top:4px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.modal-source-box .modal-label{margin-bottom:0}
.modal-source-box a{color:#2a55c2;text-decoration:none;font-weight:600;display:inline-flex;align-items:center;gap:6px;font-size:13px}
.modal-source-box a:hover{text-decoration:underline}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes slideUp{from{opacity:0;transform:translateY(16px) scale(0.98)}to{opacity:1;transform:translateY(0) scale(1)}}

/* Shared theme forces white on every button; secondary controls need their own ink. */
.concept-categories button{color:#4c5e8c!important}.concept-categories button[aria-pressed=true]{color:#fff!important}.concept-categories button:hover{background:#ecf1ff;transform:none}.concept-categories button[aria-pressed=true]:hover{background:#234291}.concept-pagination button{color:#234291!important}