:root {
  --bg-deep: #0a1628;
  --bg-panel: #0f1f38;
  --bg-panel-light: #142a4a;
  --bg-card: #11233f;
  --border-soft: #1e3458;
  --accent: #3b82f6;
  --accent-bright: #60a5fa;
  --accent-soft: #2563eb;
  --text-main: #e8eef7;
  --text-muted: #8fa3c4;
  --text-dim: #5b7299;
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --radius-lg: 1rem;
  --radius-md: 0.75rem;
  --radius-sm: 0.5rem;
  --font-main: 'Inter', -apple-system, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  min-height: 100vh;
  background: radial-gradient(circle at top left, #122546 0%, var(--bg-deep) 55%);
  color: var(--text-main);
  font-family: var(--font-main);
}

a { text-decoration: none; }

/* ===== Layout containers ===== */
.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: rgba(15, 31, 56, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
}

.brand .brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-bright), var(--accent-soft));
  box-shadow: 0 0 12px var(--accent-bright);
}

.main-content {
  flex: 1;
  padding: 2.25rem 1.5rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* ===== Login page ===== */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.login-card {
  background: linear-gradient(160deg, var(--bg-panel-light), var(--bg-panel));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.login-icon-badge {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-bright));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
}

/* ===== Category grid (dashboard) ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.category-card {
  background: linear-gradient(160deg, var(--bg-card), var(--bg-panel));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
  color: var(--text-main);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -30%;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(59,130,246,0.18), transparent 70%);
  pointer-events: none;
}

.category-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-soft);
  box-shadow: 0 16px 40px rgba(15, 35, 70, 0.5);
}

.category-card .icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: var(--accent-bright);
}

.category-card .cat-title {
  font-weight: 600;
  font-size: 1.1rem;
}

.category-card .cat-sub {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== Page header ===== */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0;
}

.breadcrumb-link {
  color: var(--text-muted);
  font-size: 0.85rem;
}
.breadcrumb-link:hover { color: var(--accent-bright); }

/* ===== Tabs ===== */
.nav-tabs.custom-tabs {
  border-bottom: 1px solid var(--border-soft);
  gap: 0.25rem;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: thin;
}

.nav-tabs.custom-tabs::-webkit-scrollbar { height: 5px; }
.nav-tabs.custom-tabs::-webkit-scrollbar-thumb { background: var(--border-soft); border-radius: 10px; }

.nav-tabs.custom-tabs .nav-link {
  color: var(--text-muted);
  border: none;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  padding: 0.65rem 1.1rem;
  font-size: 0.88rem;
  font-weight: 500;
  white-space: nowrap;
  background: transparent;
}

.nav-tabs.custom-tabs .nav-link:hover {
  color: var(--text-main);
  background: rgba(59, 130, 246, 0.08);
}

.nav-tabs.custom-tabs .nav-link.active {
  color: var(--accent-bright);
  background: var(--bg-card);
  border-bottom: 2px solid var(--accent-bright);
}

/* ===== Toolbar (search + download) ===== */
.data-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1.25rem 0;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 220px;
}

.search-box input {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  color: var(--text-main);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.9rem 0.6rem 2.4rem;
  width: 100%;
  font-size: 0.9rem;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.search-box input::placeholder { color: var(--text-dim); }

.search-box .search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-bright));
  border: none;
  color: #fff;
  border-radius: var(--radius-md);
  padding: 0.6rem 1.2rem;
  font-weight: 600;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: filter 0.15s ease, transform 0.1s ease;
}
.btn-accent:hover { filter: brightness(1.1); color: #fff; }
.btn-accent:active { transform: scale(0.98); }

.btn-ghost {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
  border-radius: var(--radius-md);
  padding: 0.6rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 500;
}
.btn-ghost:hover { color: var(--text-main); border-color: var(--accent-soft); }

/* ===== Data table ===== */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table-scroll {
  overflow-x: auto;
  max-height: 65vh;
  overflow-y: auto;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  white-space: nowrap;
}

table.data-table thead th {
  background: var(--bg-panel-light);
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  font-weight: 600;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-soft);
  position: sticky;
  top: 0;
  z-index: 5;
}

table.data-table tbody td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid rgba(30, 52, 88, 0.5);
  color: var(--text-main);
}

table.data-table tbody tr:hover td {
  background: rgba(59, 130, 246, 0.06);
}

table.data-table tbody tr:nth-child(even) td {
  background: rgba(15, 31, 56, 0.4);
}
table.data-table tbody tr:nth-child(even):hover td {
  background: rgba(59, 130, 246, 0.08);
}

.badge-status {
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
}
.badge-status.assigned { background: rgba(52, 211, 153, 0.15); color: var(--success); }
.badge-status.old { background: rgba(248, 113, 113, 0.15); color: var(--danger); }
.badge-status.default { background: rgba(96, 165, 250, 0.15); color: var(--accent-bright); }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-dim);
}

.row-count-pill {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
}

.spinner-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--text-muted);
  gap: 0.6rem;
}

.alert-soft {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: #fca5a5;
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  font-size: 0.88rem;
}

.form-control.dark-input {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  color: var(--text-main);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.9rem;
}
.form-control.dark-input:focus {
  background: var(--bg-panel);
  color: var(--text-main);
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

footer.app-footer {
  text-align: center;
  padding: 1.25rem;
  color: var(--text-dim);
  font-size: 0.78rem;
}

@media (max-width: 576px) {
  .main-content { padding: 1.5rem 1rem 2rem; }
  .login-card { padding: 1.75rem; }
}