/* Khung trang quản trị một cửa. Màu lấy từ biến của shell-v2.css nên đi theo nền sáng, tối của máy. */
body { margin: 0; background: var(--v2-bg); color: var(--v2-fg); font-family: var(--v2-font); }
.qt-layout { display: grid; grid-template-columns: 232px minmax(0, 1fr); min-height: 100vh; }
.qt-side { position: sticky; top: 0; align-self: start; height: 100vh; overflow-y: auto; background: var(--v2-surface); border-right: 1px solid var(--v2-line); padding: 14px 10px; box-sizing: border-box; }
.qt-brand { display: flex; align-items: center; gap: 8px; padding: 2px 8px 12px; }
.qt-brand a { font-weight: 700; color: var(--v2-fg); text-decoration: none; }
.qt-brand-sub { color: var(--v2-muted); font-size: 13px; flex: 1; }
.qt-menu { display: flex; flex-direction: column; gap: 2px; }
.qt-menu-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 40px; padding: 8px 10px; border-radius: 8px; color: var(--v2-fg-2); text-decoration: none; }
.qt-menu-item:hover { background: var(--v2-card-2); }
.qt-menu-item[aria-current="page"] { background: var(--v2-accent-soft); color: var(--v2-accent); font-weight: 600; }
.qt-menu-item:focus-visible, .qt-bell:focus-visible, .qt-bell-row:focus-visible, .qt-stat:focus-visible { outline: 2px solid var(--v2-accent); outline-offset: 2px; }
.qt-count { min-width: 20px; padding: 0 6px; border-radius: 10px; background: var(--v2-card-2); color: var(--v2-fg-2); font-size: 12px; font-weight: 600; line-height: 20px; text-align: center; box-sizing: border-box; }
.qt-count--urgent { background: #c62828; color: #fff; }
.qt-main { min-width: 0; }
/* Hàng tab con (DOCS/ADMIN_PANEL.md mục 2.1): link #tab/tab-con, đánh dấu bằng aria-current. */
html[data-ui="v2"] .qt-subtabs { margin: 0; padding: 8px 24px 0; }
.qt-subtab { display: inline-flex; align-items: center; gap: 6px; padding: 10px 14px; color: var(--v2-fg-2); font: 500 15px/1.3 var(--v2-font); text-decoration: none; border-bottom: 2px solid transparent; white-space: nowrap; }
.qt-subtab:hover { color: var(--v2-fg); }
.qt-subtab[aria-current="page"] { color: var(--v2-accent); border-bottom-color: var(--v2-accent); font-weight: 600; }
.qt-subtab:focus-visible { outline: 2px solid var(--v2-accent); outline-offset: -2px; }
.qt-h2 { margin: 20px 0 8px; font-size: 16px; }
.qt-note { margin-top: 16px; }
.qt-break { overflow-wrap: anywhere; }
.qt-stat { font: inherit; color: inherit; text-align: left; }
button.qt-stat { cursor: pointer; }
button.qt-stat:hover { border-color: var(--v2-accent); }
.qt-stat--bad { border-color: #c62828; }
.qt-stat--warn { border-color: #b26a00; }
.qt-fee-form { min-width: 200px; }
.qt-bell { position: relative; display: inline-flex; align-items: center; gap: 4px; min-width: 40px; min-height: 40px; justify-content: center; border: 0; border-radius: 8px; background: transparent; color: var(--v2-fg-2); cursor: pointer; }
.qt-bell:hover { background: var(--v2-card-2); }
.qt-bell-panel { margin-top: 10px; padding: 8px; border: 1px solid var(--v2-line); border-radius: 8px; background: var(--v2-card); }
.qt-bell-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.qt-bell-row { display: flex; flex-direction: column; gap: 2px; padding: 8px; border-radius: 6px; color: var(--v2-fg); text-decoration: none; }
.qt-bell-row:hover { background: var(--v2-card-2); }
.qt-bell-row--new { background: var(--v2-accent-soft); }

@media (max-width: 768px) {
  .qt-layout { grid-template-columns: minmax(0, 1fr); }
  .qt-side { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--v2-line); padding: 8px 10px; }
  .qt-brand { padding-bottom: 6px; }
  .qt-menu { flex-direction: row; overflow-x: auto; }
  .qt-menu-item { flex: none; }
  .qt-fee-form { min-width: 0; }
  html[data-ui="v2"] .qt-subtabs { padding: 4px 8px 0; }
}

/* Mục Gia sư AI (host/admin/tutor.js) */
.qt-tutor-box { margin-top: 16px; }
.qt-tutor-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.qt-tutor-stats > div { display: flex; flex-direction: column; gap: 2px; }
.qt-tutor-flags { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.qt-tutor-flag { border: 1px solid var(--v2-line, #e3e7ee); border-radius: 10px; padding: 12px; }
.qt-tutor-flag--urgent { border-color: var(--v2-bad, #c62f2f); }
.qt-tutor-turns { margin: 8px 0; padding-left: 20px; display: grid; gap: 4px; font-size: 14px; overflow-wrap: anywhere; }
.qt-tutor-hit { background: var(--v2-warn-soft, #fdf1d8); }
.qt-tutor-fs { border: 1px solid var(--v2-line, #e3e7ee); border-radius: 10px; padding: 8px 12px 12px; margin: 0 0 12px; display: grid; gap: 8px; min-width: 0; }
.qt-tutor-fs > legend { font-weight: 600; padding: 0 4px; }
.qt-tutor-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 8px 12px; }
.qt-tutor-plan { border-top: 1px solid var(--v2-line, #e3e7ee); padding-top: 12px; margin-top: 12px; }
.qt-at-list { list-style: none; padding: 0; margin: 0 0 12px; display: grid; gap: 8px; }
.qt-at-list > li { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--v2-line, #e3e7ee); overflow-wrap: anywhere; }
.qt-at-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin: 0; }
.qt-at-stats dd { margin: 2px 0 0; font-weight: 600; }
.qt-tutor-hint { border-top: 1px solid var(--v2-line, #e3e7ee); padding-top: 12px; margin-top: 12px; overflow-wrap: anywhere; }

/* Tab "AI api profile" (host/admin/ai-profiles.js, DOCS/ADMIN_PANEL.md mục 3.2) */
.qt-ai-switch { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 4px 0 12px; }
.qt-ai-key { min-width: 0; width: min(100%, 360px); font-family: ui-monospace, monospace; -webkit-text-security: disc; }
.qt-ai-add { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; align-items: end; }
.qt-ai-add > .v2-row, .qt-ai-add > p { grid-column: 1 / -1; }
.qt-ai-assign input[data-ai-field="model"] { width: 190px; max-width: 100%; font-family: ui-monospace, monospace; }
.qt-ai-assign input[data-ai-field="maxTokens"] { width: 90px; }
.qt-ai-changed { background: var(--v2-warn-soft, #fdf1d8); }
.qt-ai-confirm { margin: 12px 0; border: 2px solid var(--v2-accent); }
.qt-ai-price { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; border: 1px solid var(--v2-line); border-radius: 8px; margin: 8px 0; padding: 8px 12px; }
.qt-ai-price legend { padding: 0 4px; }
.qt-ai-savebar { position: sticky; bottom: 0; background: var(--v2-card); padding: 10px 0; gap: 8px; }
.qt-ai-log { display: grid; gap: 6px; }

/* Tab "Trường học" (host/admin/schools.js, PB-C42 (6)) */
.qt-school-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); gap: 12px; }
.qt-school-levels { border: 0; margin: 12px 0 4px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 16px; min-width: 0; }
.qt-school-levels legend { font-size: 13.5px; margin-bottom: 6px; padding: 0; color: var(--v2-fg-2); }
.qt-school-form input[aria-invalid="true"] { border-color: var(--v2-bad, #c62f2f); }
.qt-school-ok { border-color: var(--v2-ok, #1f8a4c); background: var(--v2-ok-soft, #e3f6ec); }
.qt-school-ok p, .qt-schools .ld-err p { margin: 0; overflow-wrap: anywhere; }
.qt-check { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; min-height: 32px; }