:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #697386;
  --line: #dfe5ef;
  --blue: #1f6feb;
  --green: #188038;
  --red: #c5221f;
  --amber: #b06000;
  --sidebar: #18243a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  display: block;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.sidebar {
  width: 230px;
  min-height: 100vh;
  background: var(--sidebar);
  color: white;
  padding: 22px 18px;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.brand { font-size: 20px; font-weight: 700; margin-bottom: 24px; }
.sidebar nav { display: grid; gap: 6px; }
.sidebar a {
  color: #dce8ff;
  padding: 10px 12px;
  border-radius: 6px;
}
.sidebar a:hover { background: rgba(255,255,255,.1); text-decoration: none; }
.nav-group {
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 8px;
}
.nav-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  list-style: none;
  cursor: pointer;
}
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group summary a { flex: 1; }
.nav-group summary span {
  color: #9fb5d8;
  font-size: 12px;
  padding-right: 10px;
}
.subnav {
  display: grid;
  gap: 3px;
  padding: 0 8px 8px 18px;
}
.subnav a {
  color: #bcd0ef;
  font-size: 13px;
  padding: 7px 10px;
}
.database-nav { margin-top: 12px; border-top: 1px solid rgba(255,255,255,.12); }
.sidebar-tools { display: grid; gap: 8px; margin-top: auto; padding-top: 18px; }
.sidebar-tools button { width: 100%; border-color: rgba(255,255,255,.18); background: rgba(255,255,255,.08); color: #dce8ff; }
.sidebar-tools .danger-tool { color: #ffb4ad; border-color: rgba(255,180,173,.35); }

.content { width: calc(100% - 230px); margin-left: 230px; padding: 28px; min-width: 0; }
.page-head, .section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
h1, h2 { margin: 0; letter-spacing: 0; }
h1 { font-size: 28px; }
h2 { font-size: 18px; }
p { color: var(--muted); }

.button, button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
}
.button.primary { background: var(--blue); border-color: var(--blue); color: white; }
.button.ghost { background: transparent; }
.button:hover, button:hover { text-decoration: none; filter: brightness(.97); }

.panel, .profile, .stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, .04);
}
.panel { padding: 18px; margin-bottom: 18px; overflow-x: auto; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.stat { padding: 18px; color: var(--ink); }
.stat strong { display: block; font-size: 30px; margin-bottom: 6px; }
.stat span { color: var(--muted); }
.stat.danger strong { color: var(--red); }

.two-col, .detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 18px;
}
.dashboard-sections {
  display: grid;
  gap: 18px;
}
.dashboard-sections > .panel { margin-bottom: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}
th, td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
  font-size: 14px;
  line-height: 1.35;
}
th { color: var(--muted); background: #f8fafc; font-weight: 700; }
td form { margin: 0; }
td .button, td button, td input, td select { vertical-align: middle; }
tr.overdue { background: #fff1f0; }
tr.soon { background: #fff8e6; }
.empty { text-align: center; color: var(--muted); padding: 28px; }

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  border-radius: 999px;
  background: #eef2f7;
  color: #475569;
  font-size: 12px;
  white-space: nowrap;
}
.badge.green { background: #e8f5e9; color: var(--green); }
.badge.red { background: #fdebea; color: var(--red); }
.badge.amber { background: #fff4d6; color: var(--amber); }
.badge.blue { background: #e8f0fe; color: var(--blue); }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}
input, select, textarea {
  width: 100%;
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  font: inherit;
  background: white;
}
.filters input, .filters select { width: auto; min-width: 150px; }
textarea { resize: vertical; }

.actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.actions { min-height: 28px; }
.actions form { display: inline; }
.actions button {
  min-height: auto;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--red);
}
td.actions {
  display: table-cell;
  min-height: 0;
  white-space: nowrap;
}
td.actions > a, td.actions > form {
  display: inline-flex;
  vertical-align: middle;
  margin-right: 8px;
}
td.actions > :last-child { margin-right: 0; }

.form-panel { max-width: 980px; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
label { display: grid; gap: 6px; color: var(--muted); font-weight: 700; }
label input, label select, label textarea { color: var(--ink); font-weight: 400; }
.wide, .form-actions { grid-column: 1 / -1; }
.form-section-title {
  grid-column: 1 / -1;
  margin-top: 4px;
  padding: 10px 0 2px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-weight: 700;
}
.form-actions { display: flex; justify-content: flex-end; }

.profile {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: 12px;
  padding: 18px;
  margin-bottom: 18px;
}
.profile span { display: block; color: var(--muted); margin-bottom: 6px; }
.profile strong { font-size: 16px; }
.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
}
.info-grid div { min-width: 0; }
.info-grid span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 5px; }
.info-grid strong { display: block; white-space: pre-wrap; overflow-wrap: anywhere; }
.info-grid .span-2 { grid-column: 1 / -1; }
.statistics-panel { overflow-x: hidden; }
.statistics-table { min-width: 0; table-layout: fixed; }
.statistics-table th, .statistics-table td { padding: 11px 4px; font-size: 14px; text-align: left; overflow-wrap: anywhere; }
.statistics-table th:first-child, .statistics-table td:first-child { text-align: left; width: 9%; }
.statistics-table .final-school-col { width: 13%; text-align: left; }
.statistics-table th.metric-green { background: #d9f99d; color: #3f6212; box-shadow: inset -6px 0 #f8fafc; }
.statistics-table th.metric-red { background: #fee2e2; color: var(--red); box-shadow: inset -6px 0 #f8fafc; }
.statistics-filter { align-items: stretch; }
.statistics-query-table { min-width: 0; table-layout: fixed; }
.statistics-query-table th, .statistics-query-table td { padding: 9px 7px; overflow-wrap: anywhere; }
.database-table { min-width: 0; table-layout: fixed; }
.database-table th, .database-table td { padding: 8px 7px; }
.database-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.school-database-table th:nth-child(1) { width: 18%; }
.school-database-table th:nth-child(2) { width: 47%; }
.school-database-table th:nth-child(3) { width: 22%; }
.school-database-table th:nth-child(4) { width: 13%; }
.other-database-table th:nth-child(1) { width: 28%; }
.other-database-table th:nth-child(2) { width: 72%; }
.status-button { border: 0; padding: 0; min-height: auto; background: transparent; }
.compact-select { min-width: 120px; padding: 5px 7px; min-height: 30px; }
.mini-select { min-width: 76px; width: 76px; }
.application-summary { display: flex; align-items: center; gap: 6px; white-space: nowrap; }
.application-summary form { display: inline-flex; }
.expand-link {
  min-height: auto;
  padding: 2px 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--blue);
  font-size: 12px;
}
.expanded-detail-row > td { padding: 10px 12px 16px; background: #f8fafc; }
.detail-table-scroll { overflow-x: visible; }
.application-panel { overflow-x: hidden; }
.application-table, .nested-detail-table { min-width: 0; table-layout: fixed; }
.application-table th, .application-table td { padding: 9px 6px; overflow-wrap: anywhere; }
.application-table > thead > tr > :nth-child(1), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(1) { width: 18%; }
.application-table > thead > tr > :nth-child(2), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(2) { width: 6%; }
.application-table > thead > tr > :nth-child(3), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(3) { width: 6%; }
.application-table > thead > tr > :nth-child(4), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(4) { width: 12%; }
.application-table > thead > tr > :nth-child(5), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(5) { width: 11%; }
.application-table > thead > tr > :nth-child(6), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(6) { width: 13%; }
.application-table > thead > tr > :nth-child(7), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(7) { width: 12%; }
.application-table > thead > tr > :nth-child(8), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(8) { width: 12%; }
.application-table > thead > tr > :nth-child(9), .application-table > tbody > tr:not(.expanded-detail-row) > :nth-child(9) { width: 10%; }
.nested-detail-table { margin: 0; background: white; }
.nested-detail-table th, .nested-detail-table td { padding: 5px 3px; font-size: 12px; text-align: center; overflow-wrap: anywhere; }
.nested-detail-table input, .nested-detail-table select { min-width: 0; width: 100%; padding: 4px; min-height: 30px; font-size: 12px; }
.portal-detail-table th, .portal-detail-table td { padding-left: 2px; padding-right: 2px; font-size: 11px; }
.nested-detail-table .table-checkbox { min-width: auto; width: 18px; min-height: 18px; }
.nested-detail-table .small-button { min-height: 30px; padding: 4px 7px; font-size: 12px; }
.sensitive-toggle {
  min-height: auto;
  margin-top: 5px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--blue);
  font-size: 12px;
}
.students-table td, .students-table th { vertical-align: middle; }
.task-filters input[name="q"], .students-filters input[name="q"], .important-filters input[name="q"], .timeline-filters input[name="q"], .data-engine-filters input[name="q"] { width: 135px; min-width: 135px; }
.actions button.action-neutral { color: var(--blue); }
.task-table th, .task-table td { vertical-align: middle; }
.task-filters select[name="status"] { width: 100px; min-width: 100px; }
.task-filters select[name="priority"] { width: 112px; min-width: 112px; }
.task-filters select[name="due"] { width: 125px; min-width: 125px; }
.checkbox-label { display: flex; align-items: center; align-self: end; gap: 8px; min-height: 42px; }
.checkbox-label input { width: 18px; min-height: 18px; }
[hidden] { display: none !important; }
.compact-table { min-width: 0; }
.important-item-form { display: grid; grid-template-columns: 130px minmax(220px, 2fr) minmax(150px, 1fr) 150px minmax(150px, 1fr) auto; gap: 12px; align-items: end; }
.important-form-panel { max-width: none; }
.important-item-form .button { margin-bottom: 0; }
.import-preview-form { display: grid; gap: 16px; }
.import-preview-summary { margin: -8px 0 2px; padding-left: 8px; }
.import-upload-panel { max-width: none; }
.import-student-card { border: 1px solid var(--line); border-radius: 9px; padding: 16px; background: #fbfdff; }
.import-student-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.import-check, .import-line, .import-record { display: flex; align-items: flex-start; gap: 9px; color: var(--ink); font-weight: 400; }
.import-check input, .import-line input, .import-record > input { width: 17px; min-height: 17px; flex: 0 0 auto; }
.import-student-card h3 { font-size: 14px; margin: 16px 0 8px; color: var(--muted); }
.import-field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px 16px; }
.import-line span { min-width: 130px; color: var(--muted); }
.import-line strong { overflow-wrap: anywhere; }
.import-record { align-items: center; padding: 10px; margin-bottom: 8px; border: 1px solid #e2e8f0; border-radius: 7px; background: white; }
.import-record-content { display: flex; flex-wrap: wrap; gap: 7px 15px; }
.import-record-content span { align-items: center; }
.import-record-content span { display: inline-flex; gap: 5px; overflow-wrap: anywhere; }
.import-record-content em { color: var(--muted); font-style: normal; }
.success-panel { border-color: #86c995; background: #f0fff4; }
.notice { padding: 10px 12px; margin-bottom: 14px; border-radius: 6px; background: #fff7d6; color: #7a5200; }
.error-text { display: block; margin-top: 5px; color: var(--red); max-width: 320px; }
.event-card { border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin-bottom: 14px; background: #fff; }
.event-card h3 { margin: 8px 0; }
.event-card p { margin: 6px 0; }
.event-main { display: flex; gap: 14px; align-items: flex-start; justify-content: space-between; }
.event-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.event-actions form, .event-task-form { display: inline-flex; flex: 0 0 auto; flex-wrap: nowrap; gap: 8px; align-items: center; }
.event-actions .button { flex: 0 0 auto; white-space: nowrap; }
.event-task-form select { width: 160px; min-width: 160px; }
.portal-body { display: block; background: #f6f8fb; }
.portal-header { background: var(--sidebar); color: white; padding: 18px max(20px, calc((100vw - 1180px) / 2)); display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.portal-header div, .portal-header nav { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.portal-header span { color: #bcd0ef; }
.portal-header a { color: #dce8ff; padding: 8px 10px; border-radius: 6px; }
.portal-header a.active { background: rgba(255,255,255,.15); color: white; }
.portal-content { max-width: 1180px; margin: 0 auto; padding: 28px 20px; }
.portal-content h1 { margin-bottom: 18px; }
.database-panel { overflow: hidden; }
.database-list-scroll { max-height: calc(100vh - 270px); overflow: auto; }
.database-panel > .section-head { flex: 0 0 auto; }
.reference-category {
  display: inline-flex;
  padding: 3px 8px;
  border-radius: 999px;
  background: #eef2ff;
  color: #4338ca;
  font-size: 12px;
}
.success-notice { background: #eaf7ed; color: var(--green); }
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, .38);
  backdrop-filter: blur(2px);
}
.loading-overlay.visible { display: flex; }
.loading-card { display: flex; align-items: center; gap: 12px; min-width: 260px; padding: 20px 24px; border-radius: 10px; background: white; box-shadow: 0 12px 36px rgba(15,23,42,.22); }
.loading-spinner { width: 24px; height: 24px; border: 3px solid #dbe7fb; border-top-color: var(--blue); border-radius: 50%; animation: loading-spin .75s linear infinite; }
@keyframes loading-spin { to { transform: rotate(360deg); } }
.quick-actions, .head-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.quick-actions-large .button {
  min-height: 42px;
  padding: 10px 14px;
  font-weight: 700;
}
.notes { white-space: pre-wrap; margin-bottom: 0; }
.muted { color: var(--muted); font-size: 13px; }
.matrix-scroll {
  width: 100%;
  overflow: auto;
}
.matrix-table {
  min-width: 1180px;
}
.matrix-table th, .matrix-table td {
  min-width: 170px;
}
.matrix-table .sticky-col {
  position: sticky;
  left: 0;
  z-index: 2;
  background: white;
  min-width: 190px;
}
.matrix-table th.sticky-col {
  background: #f8fafc;
}
.matrix-table small {
  display: block;
  color: var(--muted);
  margin-top: 5px;
}
.matrix-table textarea {
  min-width: 160px;
  border-color: #cbd5e1;
  background: #fbfdff;
}
.timeline-strip {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 8px 2px 18px;
  scroll-snap-type: x proximity;
}
.timeline-card {
  flex: 0 0 250px;
  min-height: 210px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  border-radius: 8px;
  background: #fff;
  padding: 14px;
  scroll-snap-align: start;
}
.timeline-card.timeline-done_past { border-top-color: #94a3b8; background: #f8fafc; opacity: .78; }
.timeline-card.timeline-overdue { border-top-color: var(--red); background: #fff8f7; }
.timeline-card.timeline-today { border-top-color: var(--amber); background: #fffdf4; }
.timeline-card.timeline-future { border-top-color: var(--blue); }
.timeline-card time {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}
.timeline-card h3 {
  font-size: 16px;
  margin: 10px 0 8px;
  line-height: 1.35;
}
.timeline-card p {
  margin: 0 0 10px;
}
.timeline-card small {
  display: block;
  color: var(--muted);
  margin-top: 10px;
  line-height: 1.4;
}
.timeline-empty {
  min-width: 100%;
}
.scroll-panel {
  max-height: 520px;
  overflow-y: auto;
}
.priority-student-table {
  table-layout: fixed;
  min-width: 0;
}
.priority-student-table .name-cell {
  width: 24%;
}
.priority-student-table .grade-cell {
  width: 14%;
  color: var(--muted);
  white-space: nowrap;
}
.priority-student-table .target-col {
  width: 40%;
}
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 900px) {
  body { display: block; }
  .sidebar { width: 100%; min-height: auto; height: auto; position: static; overflow: visible; }
  .sidebar nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .content { width: 100%; margin-left: 0; padding: 18px; }
  .stats-grid, .two-col, .detail-grid, .dashboard-grid, .profile, .form-grid, .info-grid, .database-columns, .important-item-form { grid-template-columns: 1fr; }
  .event-main, .event-actions, .portal-header { flex-direction: column; }
  .info-grid .span-2 { grid-column: auto; }
  .page-head { align-items: flex-start; flex-direction: column; }
}