body {
    font-family: 'Inter', sans-serif;
    background-color: #f3f4f6;
    color: #1f2937;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
}

.sidebar-nav a {
    padding: 0.75rem 1rem;
    color: #d1d5db;
    border-radius: 0.375rem;
    transition: background-color 0.2s, color 0.2s;
    margin-bottom: 0.5rem;
    text-decoration: none;
}

.sidebar-nav a:hover {
    background-color: #374151;
    color: white;
}

.card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    padding: 1.5rem;
}

.input-field {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 0.375rem;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.input-field:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.5);
}

.btn-primary {
    display: inline-flex;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.375rem;
    color: white;
    background-color: #2563eb;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* PDF fixes */
#invoiceDocument {
  width: 210mm;
  min-height: 297mm;
  padding: 20mm;
  box-sizing: border-box;
}

table {
  page-break-inside: auto;
}

tr {
  page-break-inside: avoid;
  page-break-after: auto;
}

td, th {
  word-break: break-word;
}

.no-break {
  page-break-inside: avoid;
}

@media print {
  body {
    background: white;
  }

  #invoiceDocument {
    box-shadow: none;
  }
}