/* Learning Library only; never changes course/review/system styles. */
#tips { background:#f7fbfb; }
#tips .section-head-row { align-items:flex-start; gap:24px; }
#tips .section-sub { max-width:56ch; }
.learning-zones { display:grid; gap:30px; }
.learning-zone { min-width:0; padding:28px; background:#fff; border:1px solid #cde4e9; border-radius:26px; box-shadow:0 12px 32px rgba(22,72,87,.045); }
.learning-zone--government { border-color:#dddccf; background:#fdfcf8; }
.learning-zone__intro { display:grid; grid-template-columns:minmax(0,1fr) 180px; align-items:center; gap:24px; margin-bottom:22px; }
.learning-zone__intro img { width:100%; height:170px; object-fit:contain; object-position:center bottom; }
.learning-zone__number,.learning-card__category { display:block; color:#126980; font-size:.73rem; font-weight:700; letter-spacing:.045em; line-height:1.55; }
.learning-zone--government .learning-zone__number,.learning-zone--government .learning-card__category { color:#53634c; }
.learning-zone__intro h3 { font-family:'IBM Plex Sans Thai',sans-serif; font-size:clamp(1.35rem,2.2vw,1.85rem); line-height:1.4; margin:8px 0; color:#103d50; }
.learning-zone__intro p { color:#4d626b; margin:0 0 10px; max-width:59ch; line-height:1.8; }
.learning-zone__topics { color:#526770; font-size:.85rem; }
.learning-zone__cards,.library-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; }
.learning-card { min-width:0; display:flex; flex-direction:column; padding:24px; border:1px solid #d9e7e9; border-radius:18px; background:#fff; text-decoration:none; color:#173a4c; transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease; }
.learning-card h3 { color:#173a4c; font-family:'IBM Plex Sans Thai',sans-serif; font-size:1.12rem; font-weight:700; line-height:1.6; margin:10px 0; }
.learning-card p { margin:0 0 20px; font-size:.94rem; color:#4c626c; line-height:1.85; }
.learning-card__read { display:block; color:#116c86; font-weight:700; font-size:.88rem; margin-top:auto; padding-top:10px; }
.learning-card__date { display:block; font-size:.73rem; color:#5b6b73; line-height:1.7; margin-bottom:10px; }
.learning-card:hover { transform:translateY(-3px); border-color:#70b8c9; box-shadow:0 12px 24px rgba(27,88,103,.08); }
.learning-card:focus-visible,.library-filters button:focus-visible,.library-prose summary:focus-visible { outline:3px solid #126980; outline-offset:5px; }
.library-hero { background:#f2f9fa; padding:54px 0 36px; }
.library-hero .eyebrow-mono { color:#126980; }
.library-hero h1 { max-width:26ch; font-size:clamp(1.8rem,4vw,2.65rem); line-height:1.5; margin:16px 0; }
.library-hero .lede { max-width:65ch; font-size:1.05rem; line-height:1.85; }
.library-assessment { padding:20px 24px; margin-bottom:25px; background:#fff9ec; border:1px solid #eadcb7; border-radius:16px; color:#425a65; line-height:1.8; }
.library-assessment a { color:#126980; font-weight:700; }
.library-filters { display:flex; gap:10px; flex-wrap:wrap; margin:18px 0 14px; }
.library-filters[hidden],.learning-card[hidden] { display:none; }
.library-filters button { font:inherit; font-weight:600; color:#254956; background:#fff; border:1px solid #9dbec8; border-radius:30px; min-height:48px; padding:11px 20px; cursor:pointer; }
.library-filters button[aria-pressed="true"] { color:#fff; background:#126980; border-color:#126980; text-decoration:underline; text-underline-offset:5px; text-decoration-thickness:2px; }
.library-filters button span { font-size:.8em; }
.library-count { font-size:.9rem; color:#516670; margin:0 0 24px; }
.library-article-head h1 { font-family:'IBM Plex Sans Thai',sans-serif; max-width:30ch; line-height:1.5; font-size:clamp(1.8rem,4vw,2.6rem); }
.library-article-head .lede { font-size:.88rem; line-height:1.8; }
.library-prose { padding-top:30px; color:#334f5b; }
.library-prose h2 { font-family:'IBM Plex Sans Thai',sans-serif; font-size:1.45rem; color:#173c4c; margin:38px 0 14px; line-height:1.65; }
.library-prose p,.library-prose li { line-height:1.95; }
.library-prose p { margin:0 0 18px; }
.library-prose li { margin-bottom:10px; }
.library-prose ul,.library-prose ol { padding-inline-start:24px; }
.library-prose a,.library-related a { color:#126980; text-decoration:underline; text-underline-offset:3px; }
.library-article-image { width:100%; height:auto; border-radius:18px; margin-bottom:28px; }
.library-table { max-width:100%; margin:22px 0; }
.library-table table { width:100%; border-collapse:collapse; font-size:.91rem; table-layout:fixed; }
.library-table th,.library-table td { padding:12px; border:1px solid #d7e4e7; text-align:left; overflow-wrap:anywhere; line-height:1.8; vertical-align:top; }
.library-table th { background:#edf7f7; color:#173e4d; }
.library-exercise { margin:22px 0 30px; padding:24px; border:1px solid #cee1e6; border-radius:18px; background:#f8fcfc; }
.library-sentence { white-space:pre-line; font-size:1.06rem; font-weight:600; color:#173e4d; }
.library-options { padding-inline-start:24px; }
.library-exercise details { border-top:1px solid #d7e6e8; margin-top:18px; padding-top:12px; }
.library-exercise summary { min-height:48px; cursor:pointer; color:#11667e; font-weight:700; padding:10px 0; line-height:1.7; }
.library-exercise details > div { padding-top:16px; }
.dna-subject,.dna-object { color:#23623d; background:#e6f3e8; }
.dna-verb { color:#155883; background:#e5f1fb; }
.dna-adjective { color:#9e315f; background:#fbe8ef; }
.dna-adverb { color:#735600; background:#fff2bd; }
.dna-modifier { color:#65562e; background:#f5eedc; }
.dna-subject,.dna-object,.dna-verb,.dna-adjective,.dna-adverb,.dna-modifier { padding:1px 4px; border-radius:4px; box-decoration-break:clone; -webkit-box-decoration-break:clone; }
.library-sources { border-top:1px solid #d7e3e6; margin-top:36px; padding-top:8px; font-size:.88rem; }
.library-related { padding:35px 0 55px; background:#f5f9fa; }
.library-related h2 { font-size:1.2rem; color:#173e4d; }
.library-related li { margin:12px 0; line-height:1.8; }
@media(max-width:900px) { .library-grid { grid-template-columns:repeat(2,minmax(0,1fr)); } .learning-zone__cards { gap:12px; } .learning-card { padding:20px; } }
@media(max-width:640px) {
 #tips .section-head-row { display:block; } #tips .head-link { display:inline-block; margin-top:16px; }
 .learning-zones { gap:22px; } .learning-zone { padding:20px 16px; border-radius:20px; }
 .learning-zone__intro { grid-template-columns:minmax(0,1fr) 95px; gap:10px; align-items:start; margin-bottom:20px; }
 .learning-zone__intro img { height:125px; margin-top:15px; }
 .learning-zone__intro h3 { font-size:1.25rem; } .learning-zone__intro p { font-size:.9rem; line-height:1.8; }
 .learning-zone__topics { font-size:.78rem; } .learning-zone__number { font-size:.63rem; }
 .learning-zone__cards,.library-grid { grid-template-columns:minmax(0,1fr); gap:13px; }
 .learning-card { padding:20px; } .learning-card h3 { font-size:1.08rem; } .learning-card p { font-size:.92rem; }
 .library-hero { padding:34px 0 24px; } .library-hero h1 { font-size:1.8rem; } .library-hero .lede { font-size:.98rem; }
 .library-filters { gap:8px; } .library-filters button { padding:10px 14px; font-size:.88rem; }
 .library-assessment { padding:18px; font-size:.94rem; }
 .library-article-head h1 { font-size:1.8rem; line-height:1.55; }
 .library-prose h2 { font-size:1.23rem; margin-top:30px; } .library-prose p,.library-prose li { font-size:1rem; line-height:1.9; }
 .library-exercise { padding:17px; } .library-sentence { font-size:1rem; }
 .library-table th,.library-table td { padding:8px 6px; font-size:.8rem; }
}
@media(prefers-reduced-motion:reduce) { .learning-card { transition:none; } .learning-card:hover { transform:none; } }