/* Cổng giáo viên (v5.1): dùng chung kiểu của trang tra cứu, thêm vài phần riêng */
.gvbar { gap: 10px; }
.gvbar .spacer { flex: 1; }
.bell { position: relative; background: transparent; border: 0; color: inherit; font-size: 22px; min-width: 44px; min-height: 44px; cursor: pointer; }
.bell i { position: absolute; top: 4px; right: 2px; background: #e5484d; color: #fff; font-style: normal; font-size: 11px; font-weight: 700;
  border-radius: 999px; min-width: 18px; height: 18px; line-height: 18px; padding: 0 4px; }
.wrap { max-width: 720px; margin: 0 auto; padding: 12px 16px 24px; }
.tabs { position: sticky; top: 56px; z-index: 4; background: var(--bg); padding-top: 4px; }
.tabs .seg { overflow-x: auto; margin-top: 0; }
.tabs .seg { gap: 2px; padding: 3px; }
.tabs .seg button { white-space: nowrap; flex: 1 1 auto; min-width: 0; padding: 10px 4px; font-size: 15px; letter-spacing: -.1px; }
@media (max-width: 380px) { .tabs .seg button { font-size: 14px; padding: 10px 2px; } }
.form label { display: block; margin: 10px 0 4px; font-weight: 600; font-size: 15px; }
.form input, .form select, .form textarea { width: 100%; font-size: 16px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--card); color: var(--ink); min-height: 44px; font-family: inherit; }
.form textarea { min-height: 96px; }
.form .row2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px; align-items: end; }
.form .row2 > div { min-width: 0; }
.form .row2 input, .form .row2 select { width: 100%; min-width: 0; box-sizing: border-box; }
.form .chk { display: flex; align-items: center; gap: 8px; font-weight: 400; }
.form .chk input { width: 22px; height: 22px; min-height: 0; }
.err { color: var(--red); margin: 8px 0; }
.ok { color: var(--green); margin: 8px 0; }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }
.btn.full { width: 100%; margin-top: 14px; font-size: 16px; }
.btn.warn { background: var(--orange); }
.ack { background: var(--orange-bg); border: 2px solid color-mix(in srgb, var(--orange) 40%, transparent); border-radius: var(--radius);
  padding: 12px; margin-bottom: 10px; display: flex; gap: 10px; align-items: center; justify-content: space-between; }
.ack b { color: var(--orange); }
.ack .btn { flex-shrink: 0; }
.ls.free { background: transparent; border-style: dashed; opacity: .7; }
.ls.free .sj { font-weight: 400; color: var(--muted); }
.ls.ev { background: var(--blue-bg); border-color: color-mix(in srgb, var(--blue) 30%, transparent); }
.ls.sub { border: 2px solid var(--orange); }
.before { color: var(--muted); font-size: 13px; margin-top: 2px; }
.sum { display: flex; flex-wrap: wrap; gap: 8px 16px; color: var(--muted); }
.sum b { color: var(--ink); font-size: 18px; }
.nl { list-style: none; margin: 0; padding: 0; }
.nl li { border-bottom: 1px solid var(--line); padding: 10px 2px; }
.nl li.unseen b { color: var(--accent); }
.nl small { color: var(--muted); display: block; }
.st { font-size: 13px; border-radius: 6px; padding: 2px 8px; font-weight: 600; background: var(--bg); color: var(--muted); }
.st.duyet { background: var(--green-bg); color: var(--green); }
.st.tu_choi { background: var(--red-bg); color: var(--red); }
.st.da_xem { background: var(--blue-bg); color: var(--blue); }
.aff { margin: 8px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.copybox { display: flex; gap: 8px; }
.copybox input { flex: 1; font-size: 13px; }
.daycard .free { color: var(--muted); font-style: italic; }
.daycard li.sub span:last-child { color: var(--orange); font-weight: 600; }
.login { max-width: 400px; margin: 24px auto; }
.foot { text-align: center; color: var(--muted); font-size: 13px; padding: 16px; }
.foot a { color: var(--accent); display: inline-block; padding: 12px 6px; min-height: 44px; box-sizing: border-box; }

/* v5.3: xác nhận giờ bận năm học mới */
.ny { border-collapse: collapse; width: 100%; margin: 8px 0 12px; font-size: 13px; }
.ny th, .ny td { border: 1px solid var(--line, #ddd); text-align: center; padding: 6px 2px; min-width: 34px; }
.ny td { cursor: pointer; height: 30px; }
.ny td.b { background: #fee2e2; color: #991b1b; font-weight: 600; }
.ny td.a { background: #fef3c7; color: #92400e; }
label.opt { display: block; padding: 8px 10px; border: 1px solid var(--line, #dde3ee); border-radius: 8px; margin: 6px 0; }

/* v6.3 (G4): tiết của GV liên cấp ghi cấp */
.cap-tag { font-size: 11px; padding: 1px 6px; border-radius: 8px; background: #fde7d6; color: #b45309; font-weight: 600; }
.cap-tag.th { background: #dcfce7; color: #0f7a3f; }