/* =========================================================
   Teacher dashboard — extends style.css (load after it)
   ========================================================= */

/* ---------- Layout & sidebar ---------- */
.t-content { min-width: 0; }
.t-content .page-head { padding: 4px 0 24px; }
.t-content .page-head h1 { font-size: clamp(24px, 3vw, 32px); }
.t-side .t-count {
  min-width: 22px; height: 22px; padding: 0 7px; border-radius: 999px;
  background: var(--warning); color: #fff; font-family: var(--font-en); font-size: 12px; font-weight: 700;
  display: inline-grid; place-items: center; line-height: 1;
}
.t-side a.active .t-count { background: #fff; color: var(--primary); }
.t-side-user { display: flex; align-items: center; gap: 10px; padding: 8px 14px 10px; min-width: 0; }
.t-side-user .avatar { width: 34px; height: 34px; font-size: 14px; }
.t-side-user b { display: block; font-size: 14px; }
.t-side-user small { display: block; color: var(--muted); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.t-side a[data-signout]:hover { background: var(--danger-50); color: var(--danger); }

/* ---------- Login ---------- */
.t-auth-ico {
  width: 60px; height: 60px; border-radius: 18px; background: rgba(255,255,255,.14);
  display: grid; place-items: center; font-size: 26px; margin-bottom: 20px; position: relative;
}
.t-login-err { margin: -6px 0 14px; }

/* ---------- Panels / overview ---------- */
.t-panel { overflow: hidden; }
.t-panel-head { margin: 0; padding: 18px 22px; border-bottom: 1px solid var(--border); }
.t-panel-body { padding: 18px 22px; }
.t-split { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.t-stat-link { color: var(--text); transition: transform .25s var(--ease), box-shadow .25s, border-color .25s; }
.t-stat-link:hover { color: var(--text); transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--primary-100); }
.stat-value small { font-size: 16px; color: var(--muted); margin-left: 2px; }
.t-mode { display: flex; align-items: center; gap: 16px; }
.t-mode.demo { background: linear-gradient(90deg, var(--accent-50), var(--card) 70%); }
.t-mode p { margin-top: 2px; }
.work-row.clickable { cursor: pointer; }
.work-row.clickable:focus-visible { outline-offset: -3px; }
.work-score .badge { margin-top: 4px; font-size: 11.5px; padding: 2px 8px; font-family: var(--font-th); }
.t-lp { padding: 14px 0; border-top: 1px solid var(--border); }
.t-lp:first-child { border-top: 0; padding-top: 0; }
.t-lp-ico {
  width: 34px; height: 34px; border-radius: 10px; background: var(--primary-50); color: var(--primary);
  display: grid; place-items: center; flex-shrink: 0; font-size: 15px;
}
.t-lp-parts { display: grid; gap: 8px; margin-top: 10px; padding-left: 46px; }
.t-lp-part { display: grid; grid-template-columns: 76px 1fr 64px; align-items: center; gap: 10px; }
.t-lp-part .en { text-align: right; font-weight: 600; color: var(--muted); font-size: 13px; }

/* ---------- Submissions ---------- */
.t-filters { margin: 0; }
.t-filters .select { width: auto; min-width: 140px; }
.t-filters .input-icon { min-width: 220px; }
.t-av { width: 34px; height: 34px; font-size: 14px; }
.t-cell-lesson { max-width: 240px; font-weight: 500; }
.t-subs small.truncate { display: block; max-width: 240px; }
.t-more { display: flex; justify-content: center; margin-top: 16px; }

/* ---------- Submission drawer ---------- */
.t-drawer .drawer-foot { flex-wrap: wrap; }
.t-drawer .drawer-foot .t-foot-left { margin-right: auto; }
.t-drawer .drawer-head h3 { display: flex; align-items: center; gap: 10px; min-width: 0; }
.t-drawer .drawer-head h3 i { color: var(--primary); }
.t-stu { display: flex; align-items: center; gap: 14px; }
.t-stu b { font-size: 17px; }
.t-sec-title { font-size: 15.5px; display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.t-sec-title i { color: var(--primary); }
.t-quiz-head { display: flex; align-items: center; gap: 20px; margin-bottom: 18px; padding: 16px; border-radius: var(--radius); background: var(--bg-soft); }
.t-quiz-head h4 { font-size: 17px; }
.review-item h4 small { margin-left: auto; font-weight: 400; color: var(--muted); white-space: nowrap; font-size: 12.5px; }
.t-ws-sum { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 16px; }
.t-ws-sum div { padding: 12px 14px; border-radius: 14px; background: var(--bg-soft); }
.t-ws-sum small { display: block; color: var(--muted); font-size: 12.5px; }
.t-ws-sum b { font-family: var(--font-en); font-size: 22px; }
.t-wsa h5 { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; color: var(--text); font-size: 15px; margin-bottom: 10px; }
.t-wsa h5 .badge { flex-shrink: 0; }
.t-wsa-no {
  display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 8px; margin-right: 8px;
  background: var(--card); color: var(--primary); font-family: var(--font-en); font-size: 12px; vertical-align: 1px;
}
/* .answer-block div uses pre-wrap; rich answers need normal whitespace */
.answer-block .t-ans, .answer-block .t-ans div { white-space: normal; }
.answer-block .t-ans .t-pre { white-space: pre-wrap; }
.t-ans { background: var(--card); border-radius: 10px; padding: 10px 14px; }
.t-mark { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; font-size: 11px; flex-shrink: 0; color: #fff; }
.t-mark.ok { background: var(--success); }
.t-mark.no { background: var(--danger); }
.t-opt-ans { display: flex; align-items: center; gap: 10px; }
.t-key { margin-top: 8px; font-size: 13.5px; color: var(--success); font-weight: 500; }
.t-multi { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.t-multi li { display: flex; align-items: center; gap: 10px; }
.t-fill-text { line-height: 2.2; }
.t-fill { padding: 2px 8px; border-radius: 6px; background: var(--primary-50); color: var(--primary-700); font-weight: 600; border-bottom: 2px solid var(--primary-200); }
.t-fill.ok { background: var(--success-50); color: var(--success); border-color: var(--success); }
.t-fill.no { background: var(--danger-50); color: var(--danger); border-color: var(--danger); text-decoration: line-through; text-decoration-thickness: 1px; }
.t-fill-key { color: var(--success); font-weight: 600; margin: 0 4px 0 4px; font-size: 13px; }
.t-match-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 5px 0; }
.t-match-l { padding: 5px 12px; border-radius: 10px; background: var(--bg-soft); font-weight: 500; }
.t-match-r { padding: 5px 12px; border-radius: 10px; border: 1.5px solid var(--border); }
.t-match-r.ok { border-color: var(--success); background: var(--success-50); }
.t-match-r.no { border-color: var(--danger); background: var(--danger-50); }
.t-match-row .t-key { margin: 0; }
.t-order { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.t-order li { display: flex; align-items: center; gap: 10px; }
.t-order-pos {
  width: 26px; height: 26px; border-radius: 8px; background: var(--primary-50); color: var(--primary);
  font-family: var(--font-en); font-weight: 700; font-size: 13px; display: grid; place-items: center; flex-shrink: 0;
}
.t-scale { display: flex; align-items: baseline; gap: 10px; }
.t-scale b { font-size: 28px; color: var(--primary); }
.t-files { margin-top: 0; margin-bottom: 8px; }
.t-thumb { border-radius: 14px; overflow: hidden; border: 1px solid var(--border); background: var(--bg-soft); cursor: zoom-in; }
.t-thumb img { width: 100%; max-height: 340px; object-fit: contain; }
.t-thumb .skeleton { height: 180px; border-radius: 0; }
.t-link { word-break: break-all; }
.t-instr { margin-bottom: 18px; padding: 12px 16px; border-radius: 14px; background: var(--info-50); }
.t-instr summary { cursor: pointer; font-weight: 600; color: var(--info); }
.t-instr p { margin-top: 8px; }
.t-grade .t-score-input { width: 120px; font-size: 20px; font-weight: 700; text-align: center; }
.t-quick { margin-top: 10px; }
.t-quick .chip { font-size: 13px; padding: 5px 12px; }
.t-quick .chip i { font-size: 10px; opacity: .6; }
.file-row .btn { flex-shrink: 0; }

/* ---------- Gradebook ---------- */
.gradebook { font-size: 14px; }
.gradebook th, .gradebook td { padding: 10px 12px; }
.gradebook .gb-name {
  position: sticky; left: 0; z-index: 2; background: var(--card);
  min-width: 190px; max-width: 240px; box-shadow: inset -1px 0 0 var(--border);
}
.gradebook th.gb-name { background: var(--bg-soft); z-index: 3; }
.gradebook tbody tr:hover td.gb-name { background: var(--primary-50); }
.gradebook .gb-name b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gradebook .gb-name small { display: block; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.gradebook .gb-cls { white-space: nowrap; }
.gradebook th.gb-group { color: var(--text); border-left: 1px solid var(--border); }
.gradebook th.gb-group span { display: block; max-width: 260px; margin: 0 auto; }
.gradebook th.gb-group.alt { background: color-mix(in srgb, var(--primary) 5%, var(--bg-soft)); }
.table.gradebook th.gb-part { text-align: center; font-weight: 500; font-size: 12.5px; }
.gradebook th.gb-part small, .gradebook th.gb-total small { display: block; font-family: var(--font-en); color: var(--faint); font-size: 11.5px; font-weight: 500; }
.gradebook .gb-first { border-left: 1px solid var(--border); }
.gradebook .gb-cell { cursor: pointer; white-space: nowrap; }
.gradebook .gb-cell:hover { background: var(--primary-100); }
.gradebook .gb-max { color: var(--faint); font-family: var(--font-en); font-size: 12px; }
.gradebook .gb-badge { font-size: 11px; padding: 1px 7px; margin-left: 4px; }
.gradebook .gb-total { border-left: 2px solid var(--border-strong); background: var(--primary-50); white-space: nowrap; }
.gradebook th.gb-total { color: var(--primary); }
.gradebook td.gb-total small { display: block; font-size: 11.5px; color: var(--muted); font-weight: 500; }
.gb-legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-top: 12px; align-items: center; }

/* ---------- Score grid (score-grid.js) — สีสถานะช่องตาม spec 6.3 / ภาพจำลอง score-grid-v2 ---------- */
.sg-wrap { min-width: 0; }
.sg-pick { margin-bottom: 10px; }
.sg-pick .sg-kind { font-size: 11px; opacity: .75; margin-left: 2px; }
.sg-bar { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; margin: 4px 0 8px; }
.sg-info { font-size: 13.5px; color: var(--muted); }
.sg-save { font-size: 13px; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; min-height: 30px; }
.sg-save.ok { color: var(--success); }
.sg-save.bad { color: var(--danger); font-weight: 600; }
.sg-blank { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 32px 20px; text-align: center; color: var(--muted); }
.sg-blank > i { font-size: 26px; color: var(--faint); }
.sg-box {
  border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--card);
  overflow: auto; max-height: max(360px, calc(100vh - 300px)); outline: none;
  scroll-padding: 96px 0 0 220px; /* scrollIntoView ไม่ให้ช่องหลบไปใต้หัวตาราง/คอลัมน์ชื่อที่ตรึงไว้ */
}
.sg-box:focus-visible, .sg-box:focus { box-shadow: 0 0 0 3px color-mix(in srgb, var(--info) 30%, transparent); }
table.sg { border-collapse: separate; border-spacing: 0; font-size: 14px; min-width: 100%; }
.sg th, .sg td { border-bottom: 1px solid var(--border); border-right: 1px solid var(--border); padding: 0; white-space: nowrap; }
.sg thead th {
  position: sticky; top: 0; z-index: 2; background: var(--card); vertical-align: bottom; text-align: center;
  padding: 8px 8px 6px; font-weight: 600; font-size: 12.5px; border-bottom: 2px solid var(--text);
}
.sg thead th.sg-colsel { background: var(--info-50); }
.sg .sg-src { display: inline-block; font-size: 10.5px; padding: 1px 6px; border-radius: 4px; background: var(--info-50); color: var(--info); margin-bottom: 3px; font-weight: 500; }
.sg .sg-src.man { background: #FEF3C7; color: #92400E; }
/* หน้าต่างจัดลำดับคอลัมน์ */
.sg-olist { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: min(60vh, 520px); overflow-y: auto; }
.sg-oitem { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border: 1px solid var(--border); border-radius: 10px; background: var(--card); }
.sg-ograb { color: var(--faint); cursor: grab; padding: 4px 6px; touch-action: none; }
.sg-ot { flex: 1; min-width: 0; font-size: 14px; overflow-wrap: anywhere; }
.sg-olist .sg-src { display: inline-block; font-size: 10.5px; padding: 1px 6px; border-radius: 4px; background: var(--info-50); color: var(--info); font-weight: 500; vertical-align: 1px; }
.sg-olist .sg-src.man { background: #FEF3C7; color: #92400E; }
.sg-olist .sg-oitem:first-child [data-sg-up], .sg-olist .sg-oitem:last-child [data-sg-down] { visibility: hidden; }
.sg .sg-t { display: block; font-size: 13px; max-width: 150px; margin: 0 auto; overflow: hidden; text-overflow: ellipsis; }
.sg .sg-m { display: flex; align-items: center; justify-content: center; gap: 2px; font-family: var(--font-en); font-weight: 400; color: var(--muted); font-size: 12px; }
.sg .sg-hbtn { border: 0; background: none; color: var(--faint); cursor: pointer; padding: 2px 4px; border-radius: 4px; font-size: 11px; }
.sg .sg-hbtn:hover { color: var(--text); background: var(--bg-soft); }
.sg .sg-mode { display: inline-flex; margin-top: 5px; border: 1px solid var(--border-strong); border-radius: 6px; overflow: hidden; }
.sg .sg-mode button { border: 0; background: var(--card); color: var(--muted); font: inherit; font-size: 11px; font-weight: 500; padding: 2px 6px; cursor: pointer; }
.sg .sg-mode button + button { border-left: 1px solid var(--border-strong); }
.sg .sg-mode button.on { background: var(--primary); color: #fff; }
.sg .sg-stick { position: sticky; left: 0; z-index: 1; background: var(--card); text-align: left; padding: 0 12px; min-width: 210px; max-width: 260px; overflow: hidden; text-overflow: ellipsis; }
.sg thead .sg-stick { z-index: 3; vertical-align: middle; }
.sg tr.sg-rowsel .sg-stick { background: var(--info-50); }
.sg .sg-no { display: inline-block; min-width: 26px; color: var(--muted); font-family: var(--font-en); }
.sg .sg-room { display: inline-block; font-size: 11px; color: var(--info); background: var(--info-50); border-radius: 4px; padding: 0 6px; margin-right: 8px; font-family: var(--font-en); }
.sg td.sg-c { position: relative; width: 96px; min-width: 96px; height: 46px; text-align: center; cursor: cell; user-select: none; }
.sg td.sg-c .sg-v { display: block; font-family: var(--font-en); font-size: 16px; font-weight: 600; line-height: 1.2; }
.sg td.sg-c .sg-s { display: block; font-size: 10.5px; line-height: 1.1; margin-top: 1px; color: var(--faint); }
.sg td.sg-sub .sg-s { color: var(--success); }
.sg td.sg-late { background: #FFFBEB; } .sg td.sg-late .sg-s { color: #B45309; }
.sg td.sg-wait { background: #FFF7ED; } .sg td.sg-wait .sg-v, .sg td.sg-wait .sg-s { color: #C2410C; } .sg td.sg-wait .sg-v { font-size: 13px; }
.sg td.sg-rev { background: #FEF2F2; } .sg td.sg-rev .sg-v, .sg td.sg-rev .sg-s { color: #B91C1C; }
.sg td.sg-not { background: #F1F5F9; } .sg td.sg-not .sg-v { color: #94A3B8; } .sg td.sg-not .sg-s { color: #64748B; }
.sg td.sg-empty .sg-v { color: #CBD5E1; }
.sg td.sg-c .sg-faded { opacity: .45; font-size: 15px; }
.sg td.sg-c .sg-retake { position: absolute; top: 5px; right: 5px; width: 7px; height: 7px; border-radius: 50%; background: var(--info); }
.sg td.sg-c .sg-fb { position: absolute; top: 0; left: 0; width: 0; height: 0; border-style: solid; border-width: 8px 8px 0 0; border-color: var(--primary) transparent transparent transparent; }
.sg td.sg-err { background: #FEE2E2; box-shadow: inset 0 0 0 2px var(--danger); }
.sg td.sg-err .sg-v, .sg td.sg-err .sg-s { color: var(--danger); }
.sg td.sg-sel { box-shadow: inset 0 0 0 2px var(--primary); }
.sg td.sg-err.sg-sel { box-shadow: inset 0 0 0 2px var(--primary), inset 0 0 0 4px var(--danger); }
.sg td.sg-edit { background: var(--card); box-shadow: inset 0 0 0 2px var(--info); }
.sg td.sg-edit .sg-s { color: var(--info); }
.sg .sg-tot { min-width: 70px; text-align: center; font-family: var(--font-en); font-weight: 600; background: var(--bg-soft); padding: 0 8px; }
.sg thead th.sg-tot { background: var(--bg-soft); vertical-align: middle; }
.sg .sg-pend { color: #C2410C; font-size: 10px; margin-left: 4px; vertical-align: super; cursor: help; }
.sg-keys { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 12px; font-size: 13px; color: var(--muted); }
.sg-keys kbd { display: inline-block; min-width: 22px; text-align: center; font-family: var(--font-en); font-size: 12px; border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 4px; padding: 0 5px; margin-right: 4px; color: var(--text); background: var(--card); }
.sg-keys .sg-hl { color: #C2410C; font-weight: 600; }
.modal-foot .sg-foot-left { margin-right: auto; }

/* มือถือ (≤ 640px): กรอกทีละงาน — รายการนักเรียนแทนตาราง (spec 6.6) */
.sg-mob { display: block; }
.sg-mob .select { width: 100%; }
.sg-minfo { font-size: 13px; color: var(--muted); margin: 6px 0 10px; }
.sg-mlist { display: flex; flex-direction: column; gap: 8px; }
.sg-mrow { background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--border-strong); border-radius: 10px; padding: 8px 10px 10px; scroll-margin: 90px 0 120px; }
.sg-mtop { display: flex; align-items: center; gap: 6px; min-width: 0; margin-bottom: 6px; }
.sg-mtop .sg-no { min-width: 22px; flex: none; }
.sg-mtop .sg-room { margin-right: 0; flex: none; }
.sg-mname { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 15px; text-align: left; background: none; border: 0; padding: 0; font-family: inherit; color: var(--text); }
.sg-mname.link { color: var(--info); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; min-height: 32px; }
.sg-mst { flex: none; font-size: 12px; color: var(--faint); }
.sg-mfb { flex: none; color: var(--primary); font-size: 13px; }
.sg-mact { display: flex; align-items: center; gap: 6px; }
.sg-mbtns { display: flex; gap: 4px; flex: none; }
.sg-mb { min-width: 40px; height: 40px; padding: 0 7px; border: 1px solid var(--border-strong); border-radius: 8px; background: var(--card); color: var(--muted); font: inherit; font-size: 13px; cursor: pointer; }
.sg-mb:active { background: var(--bg-soft); }
.sg-mb[aria-pressed="true"] { color: #fff; border-color: transparent; font-weight: 600; }
.sg-mb-sub[aria-pressed="true"] { background: var(--success); }
.sg-mb-late[aria-pressed="true"] { background: #B45309; }
.sg-mb-rev[aria-pressed="true"] { background: #B91C1C; }
.sg-mb-not[aria-pressed="true"] { background: #64748B; }
.sg-mi { flex: 1 1 56px; min-width: 52px; max-width: 90px; height: 40px; border: 1px solid var(--border-strong); border-radius: 8px; padding: 0 8px; text-align: center; font: inherit; font-family: var(--font-en); font-size: 17px; font-weight: 600; background: var(--card); color: var(--text); }
.sg-mi:focus { outline: none; border-color: var(--info); box-shadow: 0 0 0 3px color-mix(in srgb, var(--info) 30%, transparent); }
.sg-mnext { display: none; flex: none; height: 40px; }
.sg-mrow:focus-within .sg-mnext { display: inline-flex; }
.sg-m-late { border-left-color: #F59E0B; background: #FFFBEB; } .sg-m-late .sg-mst { color: #B45309; }
.sg-m-wait { border-left-color: #FB923C; background: #FFF7ED; } .sg-m-wait .sg-mst { color: #C2410C; }
.sg-m-rev { border-left-color: #EF4444; background: #FEF2F2; } .sg-m-rev .sg-mst { color: #B91C1C; }
.sg-m-not { border-left-color: #94A3B8; background: #F1F5F9; }
.sg-m-sub { border-left-color: var(--success); } .sg-m-sub .sg-mst { color: var(--success); }
.sg-m-err { border-left-color: var(--danger); background: #FEE2E2; } .sg-m-err .sg-mst { color: var(--danger); font-weight: 600; }
.sg-m-err .sg-mi { border-color: var(--danger); }
@media (max-width: 640px) {
  .sg-keys { display: none; }
  .sg-wrap .sg-bar { gap: 8px; }
}
.t-count-line { color: var(--info); font-weight: 500; }

/* ---------- Lessons manager ---------- */
.t-unit { padding: 22px 24px 6px; }
.t-unit .unit-title { margin-bottom: 6px; }
.t-unit .unit-title h2 { font-size: 19px; }
.t-unit .unit-num { width: 42px; height: 42px; font-size: 18px; border-radius: 13px; }
.t-lrow { display: flex; align-items: center; gap: 16px; padding: 16px 0; border-top: 1px solid var(--border); }
.t-lrow-ico {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0; font-size: 20px;
  background: linear-gradient(140deg, var(--primary), var(--primary-700)); color: #fff;
  display: grid; place-items: center; box-shadow: var(--shadow-glow);
}
.t-lrow.is-draft .t-lrow-ico { background: var(--bg-soft); color: var(--faint); box-shadow: none; }
.t-lrow-main { flex: 1; min-width: 0; }
.t-lrow-title { font-size: 16px; }
.t-lrow-pub { flex-shrink: 0; }
.t-lrow-act { display: flex; gap: 6px; flex-shrink: 0; }
.t-danger:hover { --btn-fg: var(--danger); --btn-bg: var(--danger-50); }

/* ---------- Lesson editor ---------- */
.t-editor { display: grid; grid-template-columns: minmax(0, 1fr); gap: 22px; } /* minmax(0,…) = a wide child can't push the page sideways */
.t-ed-head { align-items: flex-start; }
.t-ed-head p { margin-top: 2px; }
.t-editor .textarea { min-height: 64px; }
.t-editor .editor-item-head { flex-wrap: wrap; }
.t-editor .editor-item:focus-within { border-color: var(--primary-200); box-shadow: var(--shadow-sm); }
.t-sel-auto { width: auto; min-width: 170px; }
.t-tools { display: flex; gap: 2px; }
.t-points { display: inline-flex; align-items: center; gap: 6px; }
.t-points .input { width: 76px; text-align: center; }
/* ตัวแก้บทเรียน: นับเป็นคะแนนเก็บ (คะแนนเต็มที่นับ) + เตือนเฉลยขัดกับโหมดการมองเห็น */
.t-countmax .input { width: 96px; text-align: center; }
.t-warn-note { display: flex; gap: 10px; align-items: flex-start; padding: 10px 14px; border-radius: 12px; background: var(--warning-50); color: #7a4a00; font-size: 14px; margin: 0 0 12px; }
.t-warn-note i { color: var(--warning); margin-top: 3px; }
.t-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 16px; }
.t-fields .t-wide { grid-column: 1 / -1; }
.t-info-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 28px; }
.t-icon-current { display: flex; align-items: center; gap: 14px; margin: 8px 0 14px; }
.t-icon-big {
  width: 64px; height: 64px; border-radius: 20px; font-size: 28px; color: #fff;
  background: linear-gradient(140deg, var(--primary), var(--primary-700)); display: grid; place-items: center; box-shadow: var(--shadow-glow);
}
.t-icon-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.t-icon-btn {
  aspect-ratio: 1; border-radius: 12px; border: 1.5px solid var(--border); background: var(--card); color: var(--muted);
  font-size: 17px; cursor: pointer; display: grid; place-items: center; transition: all .2s;
}
.t-icon-btn:hover { border-color: var(--primary-200); color: var(--primary); background: var(--primary-50); }
.t-icon-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; box-shadow: var(--shadow-glow); }
.t-id { display: inline-block; padding: 9px 14px; border-radius: 10px; background: var(--bg-soft); color: var(--muted); word-break: break-all; }
.t-help-box { padding: 14px 18px; border-radius: 14px; background: var(--info-50); color: #1e3a6e; }
.t-help-box ul { margin: 6px 0 0; padding-left: 20px; display: grid; gap: 4px; }
.t-help-box b i { color: var(--info); }
.t-embed-preview .embed-frame { box-shadow: var(--shadow-sm); }
.t-embed-empty {
  aspect-ratio: 16/9; border-radius: var(--radius); border: 2px dashed var(--border-strong);
  display: grid; place-items: center; color: var(--faint); text-align: center; padding: 20px;
}
.t-embed-empty i { font-size: 30px; display: block; margin-bottom: 8px; }
.t-sub-title { font-size: 16px; }
.choice-edit .input { flex: 1; }
.choice-edit:has(input:checked) .input { border-color: var(--success); background: var(--success-50); }
.t-choice-key {
  width: 26px; height: 26px; border-radius: 8px; background: var(--bg-soft); color: var(--muted);
  font-weight: 700; font-size: 12.5px; display: grid; place-items: center; flex-shrink: 0;
}
.t-tf { display: flex; gap: 10px; flex-wrap: wrap; }
.t-tf-opt { position: relative; cursor: pointer; }
.t-tf-opt input { position: absolute; opacity: 0; pointer-events: none; }
.t-tf-opt span { display: inline-flex; align-items: center; gap: 8px; padding: 9px 20px; border-radius: 12px; border: 1.5px solid var(--border); font-weight: 600; transition: all .2s; }
.t-tf-opt input:checked + span { border-color: var(--success); background: var(--success-50); color: var(--success); }
.t-tf-opt input:focus-visible + span { outline: 3px solid var(--primary-200); outline-offset: 2px; }
.t-pair { display: grid; grid-template-columns: 1fr auto 1fr auto; gap: 10px; align-items: center; margin-bottom: 8px; }
.t-scale-grid { display: grid; grid-template-columns: 1fr 1fr 2fr 2fr; gap: 0 14px; }
.t-fill-preview { padding: 12px 16px; border-radius: 12px; background: var(--bg-soft); line-height: 2.3; margin-bottom: 16px; }
.t-blank {
  display: inline-block; padding: 0 10px; margin: 0 3px; border-radius: 6px 6px 0 0; line-height: 1.9;
  border-bottom: 2px dashed var(--success); background: var(--success-50); color: var(--success); font-weight: 600; font-size: 14px;
}
.t-blank.free { border-color: var(--border-strong); background: var(--card); color: var(--muted); font-weight: 400; }
.t-add-types { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 14px; border-radius: var(--radius); border: 1.5px dashed var(--border-strong); }
.t-accept { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.t-accept .opt { position: relative; }
.t-align-end { align-items: end; }
.t-off { padding: 16px 18px; border-radius: var(--radius); background: var(--bg-soft); color: var(--muted); font-size: 14.5px; display: flex; align-items: center; gap: 10px; }
.t-savebar {
  position: sticky; bottom: 16px; z-index: 20; display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; padding: 12px 16px; border-radius: 18px; box-shadow: var(--shadow-lg);
  background: rgba(255, 255, 255, .94); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.t-errs { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.t-errs li { display: flex; gap: 10px; padding: 10px 14px; border-radius: 12px; background: var(--danger-50); color: var(--danger); font-size: 14.5px; }
.t-errs i { margin-top: 4px; }
.t-json { min-height: 380px; font-size: 12.5px; line-height: 1.5; white-space: pre; overflow-wrap: normal; overflow-x: auto; }

/* ---------- Announcements ---------- */
.t-ann-list { display: grid; gap: 14px; }
.t-ann { border-left: 4px solid var(--border-strong); }
.t-ann.pinned { border-left-color: var(--accent); }
.t-ann h3 { font-size: 18px; }

/* ---------- Settings ---------- */
.t-settings { grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; }
.t-set-row { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-top: 1px solid var(--border); }
.t-set-row:first-child { border-top: 0; padding-top: 0; }
.t-danger-zone { border-color: color-mix(in srgb, var(--danger) 25%, white); }
.t-danger-zone .card-head h3 i { color: var(--danger); }

/* ---------- Slides: upload mode (pages-editor.js) ---------- */
.pe-note { display: flex; gap: 10px; align-items: flex-start; padding: 12px 16px; border-radius: 14px; background: var(--warning-50); color: #7a4a00; font-size: 14px; margin-bottom: 12px; }
.pe-note i { color: var(--warning); margin-top: 3px; }
.pe-drop { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 18px; border-radius: var(--radius); border: 2px dashed var(--border-strong); transition: border-color .2s, background .2s; }
.pe-drop.is-over { border-color: var(--primary); background: var(--primary-50); }
.pe-drop-ico { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; font-size: 22px; background: var(--primary-50); color: var(--primary); flex-shrink: 0; }
.pe-drop-text { flex: 1 1 220px; min-width: 0; }
.pe-progress { flex-basis: 100%; display: grid; gap: 6px; }
.pe-progress[hidden] { display: none; }
.pe-bar { height: 8px; border-radius: 99px; background: var(--bg-soft); overflow: hidden; }
.pe-bar span { display: block; height: 100%; width: 0; background: var(--primary); transition: width .2s; }
.pe-head { margin: 18px 0 10px; }
.pe-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 14px; }
.pe-card { border: 1.5px solid var(--border); border-radius: 14px; padding: 8px; display: grid; gap: 8px; align-content: start; min-width: 0; }
.pe-card.is-cover { border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-100); }
.pe-thumb { position: relative; aspect-ratio: 16/9; border-radius: 10px; overflow: hidden; background: var(--bg-soft); display: grid; place-items: center; }
.pe-thumb img { width: 100%; height: 100%; object-fit: contain; }
.pe-miss { font-size: 12px; color: var(--muted); padding: 6px; text-align: center; }
.pe-no { position: absolute; left: 6px; bottom: 6px; padding: 1px 8px; border-radius: 99px; background: rgba(11, 18, 32, .7); color: #fff; font-size: 12px; }
.pe-badge { position: absolute; top: 6px; display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px; border-radius: 99px; font-size: 12px; font-weight: 700; border: 0; }
.pe-cover { left: 6px; background: var(--primary); color: #fff; }
.pe-play { right: 6px; background: rgba(11, 18, 32, .78); color: #fff; cursor: pointer; font-family: inherit; }
.pe-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.pe-actions .btn { flex: 1 1 auto; padding: 6px 8px; font-size: 13px; }
.pe-items { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.pe-items li { display: flex; align-items: center; gap: 4px; padding: 2px 2px 2px 8px; border-radius: 8px; background: var(--bg-soft); font-size: 13px; min-width: 0; }
.pe-items .pe-ico { color: var(--muted); font-size: 11px; }
.pe-items .pe-txt { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pe-items .btn-icon.btn-sm { width: 28px; height: 28px; flex-shrink: 0; }
.is-busy .pe-grid { opacity: .55; }
[data-pe-preview] { margin-top: 12px; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .t-side-user { display: none; }
  .t-side a .grow { flex: none; }
}
@media (max-width: 900px) {
  .t-split, .t-info-grid, .t-settings { grid-template-columns: 1fr; }
  .t-lrow { flex-wrap: wrap; }
  .t-lrow-main { flex-basis: calc(100% - 64px); }
  .t-lrow-pub { margin-left: 64px; }
  .t-lrow-act { margin-left: auto; }
  .t-lbl { display: none; }
}
@media (max-width: 640px) {
  .t-filters .select { min-width: 0; flex: 1 1 calc(50% - 6px); }
  .t-filters .input-icon { min-width: 0; flex: 1 1 100%; }
  .t-fields, .t-scale-grid, .t-accept { grid-template-columns: 1fr; }
  .t-pair { grid-template-columns: 1fr 1fr auto; }
  .t-pair > i { display: none; }
  .t-icon-grid { gap: 6px; }
  .t-ws-sum b { font-size: 18px; }
  .t-quiz-head { flex-direction: column; text-align: center; }
  .t-quiz-head .chips { justify-content: center; }
  .t-lp-parts { padding-left: 0; }
  /* one compact row on phones (it used to wrap to ~20% of the screen) */
  .t-savebar { bottom: 10px; padding: 8px 10px; flex-wrap: nowrap; gap: 8px; }
  .t-savebar [data-status] { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12.5px; }
  .t-savebar [data-status] .badge { white-space: normal; line-height: 1.3; border-radius: 12px; } /* long status wraps to 2 lines instead of being cut */
  .t-savebar .row { flex-wrap: nowrap; gap: 6px; }
  .t-savebar .btn { padding: 8px 12px; }
  .t-savebar [data-json] { display: none; } /* JSON editing is a desktop task */
  /* gradebook: narrower sticky name column so scores stay visible */
  .gradebook .gb-name { min-width: 128px; max-width: 150px; }
  .gradebook th, .gradebook td { padding: 8px 9px; }
  .t-mode { flex-wrap: wrap; }
  .t-unit { padding: 18px 16px 4px; }
  .t-set-row { flex-wrap: wrap; }
}