.site-header a { color: var(--muted); }
.head-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.who[hidden] { display: none; }
.who { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 0.9rem; }

.login { max-width: 380px; margin: 40px auto; }
.login h2 { margin: 0 0 12px; font-size: 1.2rem; }
.login form { display: flex; flex-direction: column; gap: 12px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; color: var(--muted); }
input, select, textarea {
  font: inherit; font-size: 0.92rem; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; min-width: 0;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--hoc-bar); outline-offset: 0; border-color: transparent; }
.msg { min-height: 1.2em; margin: 6px 0; font-size: 0.9rem; }
.msg.err { color: var(--thi-fg); }
.msg.ok { color: var(--nghi-fg); }

.savebar {
  position: sticky; top: 0; z-index: 5; background: var(--bg);
  display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 0 8px; border-bottom: 1px solid var(--border);
}
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab { font: inherit; font-size: 0.92rem; padding: 7px 12px; border-radius: 8px; border: 1px solid transparent; background: transparent; color: var(--muted); cursor: pointer; }
.tab.active { background: var(--surface); border-color: var(--border); color: var(--text); font-weight: 600; }
.save-actions { display: flex; align-items: center; gap: 10px; }
.dirty { color: var(--le-fg); background: var(--le-bg); padding: 4px 8px; border-radius: 6px; font-size: 0.85rem; }

.hint { color: var(--muted); font-size: 0.88rem; margin: 6px 0 12px; }

.check { font-size: 0.88rem; }
.check .bad { background: var(--thi-bg); color: var(--thi-fg); border-left: 4px solid var(--thi-bar); border-radius: 6px; padding: 8px 10px; margin: 6px 0; }
.check .good { color: var(--nghi-fg); margin: 6px 0; }

/* Lịch theo ngày */
.a-days { display: flex; flex-direction: column; gap: 8px; margin-bottom: 24px; }
.a-day { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; display: grid; grid-template-columns: 110px 1fr; gap: 10px; }
.a-day.changed { border-color: var(--le-bar); }
.a-day .dlabel { font-weight: 600; line-height: 1.3; }
.a-day .dlabel small { display: block; color: var(--muted); font-weight: 400; }
.a-day .dlabel .mini { margin-top: 6px; font-size: 0.78rem; padding: 3px 6px; }
.a-slot { display: grid; grid-template-columns: 26px 150px 190px 1fr; gap: 6px; align-items: center; }
.a-slot + .a-slot { margin-top: 6px; }
.a-slot .k { font-weight: 700; text-align: center; border-left: 4px solid var(--border); border-radius: 3px; padding: 4px 0; }
.a-slot .k.t-hoc, .a-slot .k.t-thi, .a-slot .k.t-nghi, .a-slot .k.t-le, .a-slot .k.t-hoatdong { background: transparent; }
.a-weekend { color: var(--muted); font-size: 0.85rem; padding: 2px 12px; }

/* Bảng sửa */
.edit-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; margin-bottom: 10px; }
.edit-table th { text-align: left; color: var(--muted); font-weight: 600; padding: 6px; white-space: nowrap; }
.edit-table td { padding: 4px; vertical-align: top; }
.edit-table input, .edit-table select { width: 100%; }
.edit-table .w-xs { width: 56px; }
.edit-table .w-s { width: 80px; }
.edit-table .w-d { width: 118px; }
.icon-btn { font: inherit; background: none; border: 1px solid var(--border); color: var(--muted); border-radius: 6px; padding: 5px 9px; cursor: pointer; }
.icon-btn:hover { color: var(--thi-fg); border-color: var(--thi-bar); }

.history { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.history li { display: flex; justify-content: space-between; align-items: center; gap: 10px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; }

#a-json { width: 100%; min-height: 60vh; font-family: ui-monospace, Consolas, monospace; font-size: 0.82rem; }

@media (max-width: 760px) {
  .a-day { grid-template-columns: 1fr; }
  .a-slot { grid-template-columns: 26px 1fr 1fr; }
  .a-slot .lbl { grid-column: 2 / -1; }
}

/* Tab Giảng viên */
.lec-top { display: grid; grid-template-columns: 2fr 1fr 2fr; gap: 10px; margin-bottom: 12px; }
.paste-box { margin-bottom: 14px; }
.paste-box summary { cursor: pointer; }
#paste-area { width: 100%; font-family: ui-monospace, Consolas, monospace; font-size: 0.8rem; }
.lec-lessons { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.lesson { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; display: grid; grid-template-columns: 130px 1fr; gap: 10px; }
.lesson.orphan { border-style: dashed; }
.lesson .dlabel small { display: block; color: var(--muted); }
.lesson .fields { display: flex; flex-direction: column; gap: 6px; }
.lesson .trow { display: grid; grid-template-columns: 1fr 130px; gap: 6px; }
.lesson .lrow { display: grid; grid-template-columns: 110px 1fr 140px 34px; gap: 6px; }
.lesson .lrow-head { font-size: 0.78rem; color: var(--muted); }
@media (max-width: 760px) {
  .lec-top { grid-template-columns: 1fr; }
  .lesson { grid-template-columns: 1fr; }
  .lesson .trow { grid-template-columns: 1fr; }
  .lesson .lrow { grid-template-columns: 80px 1fr; }
  .lesson .lrow .ph { grid-column: 1 / 2; }
}