/* Fleet Tracker v1.0 — Custom styles (plain CSS, works with Tailwind CDN) */

.nav-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #94a3b8;
  transition: background-color 0.15s, color 0.15s;
}
.nav-btn:hover {
  background-color: #1e293b;
  color: #fff;
}
.nav-btn.active {
  background-color: rgba(37, 99, 235, 0.2);
  color: #3b82f6;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: #2563eb;
  color: #fff;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.5rem;
  transition: background-color 0.15s;
}
.btn-primary:hover { background-color: #1d4ed8; }
.btn-primary:disabled { opacity: 0.5; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  background-color: #1e293b;
  color: #e2e8f0;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.5rem;
  border: 1px solid #334155;
  transition: background-color 0.15s;
}
.btn-secondary:hover { background-color: #334155; }

.btn-danger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  background-color: rgba(220, 38, 38, 0.2);
  color: #f87171;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.5rem;
  border: 1px solid #991b1b;
  transition: background-color 0.15s;
}
.btn-danger:hover { background-color: rgba(220, 38, 38, 0.3); }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.status-healthy {
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.status-due {
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.status-overdue,
.status-oos {
  background-color: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.card {
  background-color: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(51, 65, 85, 0.8);
  border-radius: 0.75rem;
  padding: 1rem;
}
@media (min-width: 640px) {
  .card { padding: 1.25rem; }
}

.table-wrap {
  overflow-x: auto;
  border-radius: 0.75rem;
  border: 1px solid rgba(51, 65, 85, 0.8);
}
table.data-table {
  width: 100%;
  font-size: 0.875rem;
  text-align: left;
}
table.data-table th {
  padding: 0.75rem 1rem;
  background-color: rgba(30, 41, 59, 0.8);
  color: #94a3b8;
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
table.data-table td {
  padding: 0.75rem 1rem;
  border-top: 1px solid #1e293b;
  white-space: nowrap;
}
table.data-table tr:hover td {
  background-color: rgba(30, 41, 59, 0.4);
}

.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: #94a3b8;
  margin-bottom: 0.25rem;
}
.form-input {
  width: 100%;
  background-color: #020617;
  border: 1px solid #334155;
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: #f1f5f9;
}
.form-input::placeholder { color: #64748b; }
.form-input:focus {
  outline: none;
  box-shadow: 0 0 0 2px #3b82f6;
  border-color: transparent;
}
.form-select {
  width: 100%;
  background-color: #020617;
  border: 1px solid #334155;
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: #f1f5f9;
  appearance: none;
}
.form-select:focus {
  outline: none;
  box-shadow: 0 0 0 2px #3b82f6;
  border-color: transparent;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  text-align: center;
  color: #64748b;
}

.chart-box {
  position: relative;
  height: 14rem;
}
@media (min-width: 640px) {
  .chart-box { height: 16rem; }
}