:root {
  --blue-900: #003b86;
  --blue-700: #005ec4;
  --gold-500: #d9a62e;
  --white: #ffffff;
  --gray-100: #f3f6fb;
  --gray-200: #e6edf7;
  --text-900: #0d1f35;
  --danger: #b42318;
  --ok: #0f6b3a;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text-900);
  background: var(--gray-100);
  min-height: 100%;
}

.hidden {
  display: none !important;
}

.login-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
  background: linear-gradient(135deg, #0a4fa8 0%, #0f74dc 45%, #0a3f87 100%);
}
.login-card {
  width: min(420px, 100%);
  background: var(--white);
  border-radius: 12px;
  padding: 1.75rem;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}
.login-card h1 {
  margin: 0 0 0.25rem;
  font-size: 1.35rem;
  color: var(--blue-900);
}
.login-card p {
  margin: 0 0 1.25rem;
  color: #5a6b82;
  font-size: 0.92rem;
}

.backend-warn {
  background: #fff4d6;
  border-bottom: 2px solid var(--gold-500);
  color: var(--text-900);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  line-height: 1.55;
}
.backend-warn code {
  background: rgba(255, 255, 255, 0.68);
  padding: 0.08rem 0.35rem;
  border-radius: 4px;
  font-size: 0.86em;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.9rem;
}
.field label {
  font-size: 0.88rem;
  font-weight: 600;
  color: #2b3d55;
}
.field input,
.field select,
.field textarea {
  border: 1px solid #c9d6ea;
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
  font: inherit;
}
.field textarea {
  min-height: 120px;
  resize: vertical;
}
.btn {
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0.55rem 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font: inherit;
}
.btn.primary {
  background: var(--gold-500);
  color: #1f1b12;
}
.btn.ghost {
  background: transparent;
  border-color: #aac7ff;
  color: var(--blue-900);
}
.btn.danger {
  background: #fde8e6;
  border-color: #f3b4ad;
  color: var(--danger);
}
.btn.sm {
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
}
.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}
@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: sticky;
    top: 0;
    z-index: 6;
  }
}

.sidebar {
  background: rgba(0, 59, 134, 0.96);
  color: #e8f1ff;
  padding: 1.25rem 1rem;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}
.sidebar .brand {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 800;
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
  color: #fff;
}
.sidebar .brand__logo {
  width: 1.85rem;
  height: 1.85rem;
  flex-shrink: 0;
}
.sidebar .brand__text {
  line-height: 1.15;
}
.sidebar .sub {
  font-size: 0.82rem;
  opacity: 0.85;
  margin-bottom: 1.1rem;
}
.nav-btn {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: #e8f1ff;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  margin-bottom: 0.35rem;
}
.nav-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}
.nav-btn.active {
  border-color: rgba(255, 243, 196, 0.45);
  background: rgba(255, 255, 255, 0.1);
}
.sidebar .foot {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.82rem;
  opacity: 0.9;
}

.main {
  padding: 1.25rem 1.25rem 2.5rem;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}
.topbar h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--blue-900);
}
.muted {
  color: #5a6b82;
  font-size: 0.9rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.stat {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}
.stat b {
  display: block;
  font-size: 1.45rem;
  color: var(--blue-900);
}
.stat span {
  color: #5a6b82;
  font-size: 0.88rem;
}

.panel {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 1rem;
  margin-top: 0.75rem;
}
.panel h3 {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  color: var(--blue-900);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 720px;
}
th,
td {
  border-bottom: 1px solid var(--gray-200);
  padding: 0.55rem 0.6rem;
  vertical-align: top;
}
th {
  text-align: left;
  background: var(--gray-100);
  color: #2b3d55;
  font-weight: 700;
}

.badge {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid transparent;
}
.badge.new {
  background: #fff4d6;
  border-color: #f0d793;
}
.badge.closed {
  background: #eaf7ef;
  border-color: #bfe5cd;
}

dialog.modal {
  border: none;
  border-radius: 12px;
  padding: 0;
  width: min(920px, 92vw);
  box-shadow: 0 26px 80px rgba(0, 0, 0, 0.25);
}
.modal header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--gray-200);
}
.modal header h4 {
  margin: 0;
  font-size: 1rem;
  color: var(--blue-900);
}
.modal .body {
  padding: 1rem;
}
.modal footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-100);
}

.toast {
  position: fixed;
  right: 16px;
  bottom: 16px;
  background: var(--blue-900);
  color: var(--white);
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.2);
  z-index: 50;
  max-width: min(560px, 92vw);
  font-size: 0.9rem;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}