/* หน้าบทเรียนของช่วงชั้น (learn/index.html) — หน้าตาแบบแท็บเอกสารของสื่อการสอน: การ์ดเล่มหัวสีเข้ม · บทเป็น Accordion · แถวงานเรียงตามลำดับ */
.ls-hero h1{font-size:30px;margin:0}
.ls-hero p{margin:4px 0 14px}
.ls-filter{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:flex-end;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 16px;margin:0 0 16px}
.ls-filter label{display:flex;flex-direction:column;gap:4px;font-size:13px;font-weight:700;color:var(--muted)}
.ls-filter select{font:inherit;font-size:15px;font-weight:500;color:var(--ink);min-height:42px;border:1.5px solid var(--line);border-radius:10px;padding:0 10px;background:#fff;min-width:180px}
.ls-filter .hint{font-size:14px;color:var(--ink-2);flex:1 1 220px;align-self:center}
.ls-who{margin:0 0 14px;padding:10px 14px;border-radius:12px;background:var(--accent-soft);color:var(--accent);font-weight:600}
.ls-levels{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.ls-levels a{display:flex;flex-direction:column;gap:4px;background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:16px 18px;text-decoration:none;color:var(--ink)}
.ls-levels a:hover{border-color:var(--accent)}
.ls-levels b{font-family:var(--head);font-size:22px}
.ls-levels span{font-size:14px;color:var(--muted)}
.ls-book{background:#fff;border:1px solid #D9D2E3;border-radius:16px;box-shadow:var(--shadow);margin-bottom:22px;overflow:hidden}
.ls-book>header{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--bkd);color:#fff}
.ls-book>header h2{margin:0;font-size:21px;color:#fff}
.ls-book>header span{background:rgba(255,255,255,.18);border-radius:99px;padding:2px 12px;font-weight:700;font-size:14px;white-space:nowrap}
details.lch{border-top:1px solid #DDD7E6}
details.lch>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;padding:12px 20px;min-height:56px;box-sizing:border-box}
details.lch>summary::-webkit-details-marker{display:none}
details.lch>summary:hover{background:#F5F2F9}
details.lch[open]>summary{background:#EFEBF5;box-shadow:inset 5px 0 0 var(--bk)}
.lch .no{background:var(--bk);color:#fff;font-family:var(--head);font-weight:600;font-size:15px;border-radius:8px;padding:2px 10px;white-space:nowrap}
.lch .ct{flex:1 1 auto;min-width:0;font-family:var(--head);font-weight:600;font-size:17px;color:var(--ink)}
.lch .cm{font-size:14px;color:#4A4555;white-space:nowrap}
.lch .cm.on{color:#1E7A4C;font-weight:700}
.lch .chev{flex:0 0 auto;color:var(--ink-2);transition:transform .2s}
.lch[open] .chev{transform:rotate(180deg)}
.lch-body{border-left:5px solid var(--bk);padding-bottom:6px}
.lch-games{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:10px 20px 4px 25px;font-size:14px;color:var(--ink-2)}
.lch-note{padding:10px 20px 4px 25px;font-size:14px;color:var(--ink-2);margin:0}
/* แถวงาน: เลขเรื่อง · ชื่อ + ป้าย · ปุ่ม อ่าน/ใบงาน (สถานะอยู่ในปุ่ม) — สีหลักสีเดียว ป้ายสีกลาง ไม่แสดงสถานะตั้งต้น */
.lrow{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:6px 14px;align-items:center;padding:9px 20px 9px 22px;border-top:1px solid #EEEAF3}
.lno{font-family:var(--head);font-weight:600;font-size:14px;color:var(--bkd);background:#F2EFF6;border-radius:8px;text-align:center;padding:3px 2px;line-height:1.4;white-space:nowrap}
.lno.i{background:none;color:var(--muted);font-size:17px}
.lrow .tt{min-width:0}
.lrow .tt a,.lrow .tt b{font-weight:600;color:var(--ink);text-decoration:none;line-height:1.45}
.lrow .tt a:hover{color:var(--bkd);text-decoration:underline}
.lrow.test .tt a,.lrow.test .tt b{font-weight:500;color:var(--ink-2)}
.lrow .tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:3px}
.ltag{display:inline-flex;align-items:center;gap:4px;font:inherit;font-size:13px;line-height:22px;padding:0 9px;border-radius:99px;background:#F2EFF6;color:var(--ink-2);border:0;text-decoration:none;cursor:default;white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.ltag.g{background:none;border:1px solid #DDD7E6;line-height:20px}
.ltag.game.ic{padding:0 7px;font-size:14px}
a.ltag,button.ltag,summary.ltag{cursor:pointer}
a.ltag:hover,button.ltag:hover,summary.ltag:hover{background:#E8E3EF;text-decoration:underline}
details.lvids{display:inline-block;max-width:100%}
details.lvids>summary{list-style:none}
details.lvids>summary::-webkit-details-marker{display:none}
details.lvids[open]>summary{background:#E8E3EF}
.lvids-l{display:flex;flex-wrap:wrap;gap:5px;margin-top:5px}
.acts{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}
.lact{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 12px;border:1.5px solid #DDD7E6;border-radius:99px;background:#fff;color:var(--ink);font-size:14px;font-weight:600;text-decoration:none;white-space:nowrap}
.lact:hover{border-color:var(--bk);color:var(--bkd)}
.lact .lst{font-weight:700;font-size:13px}
.lact .ic{font-size:15px;margin-right:2px}
.lact.done{border-color:#BFE3CD;background:#F2FAF5}.lact.done .lst{color:#1E7A4C}
.lact.pend{border-color:#EED9A6;background:#FFF9EA}.lact.pend .lst{color:#7A5200}
.lact.part .lst{color:#1D5FA8}
.lact.na .lst{color:var(--muted);font-weight:500;font-size:12px}
.lact.lock{color:var(--muted);background:#FAF9FC;cursor:default}
.lrow .st{font-size:13px;font-weight:600;white-space:nowrap;color:var(--muted)}
.st.done{color:#1E7A4C}
.st.part{color:#1D5FA8}
.st.pend{color:#7A5200;background:#FFF1D0;border-radius:99px;padding:2px 10px}
.st.na{font-weight:500;font-size:12px}
.st.lock{color:#7A5200}
.lrow.locked{background:#FAF9FC}
.lrow.locked .tt b{color:var(--muted)}
.lrow.soon .tt b{color:#4A4555;font-weight:500}
.ls-empty{background:#fff;border:1px dashed #D5CDE0;border-radius:16px;padding:18px 20px}
.ls-empty p{margin:0 0 10px}
@media (max-width:600px){
  .lrow{grid-template-columns:38px minmax(0,1fr);padding:9px 14px 10px 14px;gap:6px 10px}
  .acts{grid-column:2;justify-content:flex-start}
  details.lch>summary{flex-wrap:wrap;gap:6px 10px;padding:10px 14px}
  .lch .ct{flex-basis:100%;order:3}
  .lch .chev{margin-left:auto}
  .ls-filter select{min-width:0;width:100%}
  .ls-filter label{flex:1 1 140px}
}