:root {
  --primary: #1a1a2e;
  --accent: #f5a623;
  --accent-light: #fff3e0;
  --bg: #f4f5f9;
  --card-bg: #ffffff;
  --border: #e0e3ee;
  --text: #1a1a2e;
  --text-muted: #8890aa;
  --success: #2e7d32;
  --warning: #e65100;
  --danger: #c62828;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(26, 26, 46, 0.08);
  --font-display: 'DM Serif Display', serif;
  --font-body: 'DM Sans', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
}

.navbar {
  background: var(--primary);
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  color: white;
  font-family: var(--font-display);
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  color: var(--accent);
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-link {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}

.nav-logout-form {
  margin: 0;
}

.nav-logout-btn {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.2s;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.nav-logout-btn:hover {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

.create-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 20px;
}

.form-section {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.full-width {
  margin-bottom: 20px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.section-header .section-title {
  margin-bottom: 0;
}

.section-hint {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group.inline {
  max-width: 220px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

input[type='text'],
input[type='email'],
input[type='tel'],
input[type='password'],
input[type='number'],
input[type='date'],
textarea,
select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--bg);
  color: var(--text);
  transition: border 0.2s;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.readonly-field {
  background: #f0f2f8 !important;
  color: var(--text-muted);
  cursor: not-allowed;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.totals-controls-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

.totals-control-group {
  max-width: 100% !important;
}

.logo-upload-area {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  cursor: pointer;
  margin-bottom: 20px;
  transition: border-color 0.2s;
  background: var(--bg);
}

.logo-upload-area:hover {
  border-color: var(--accent);
}

.logo-upload-area #logoPlaceholder {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text-muted);
}

.logo-upload-area #logoPlaceholder span {
  color: var(--text);
  font-weight: 600;
}

.logo-upload-area #logoPlaceholder small {
  color: var(--text-muted);
}

.logo-preview {
  max-height: 80px;
  max-width: 200px;
  object-fit: contain;
}

.hidden {
  display: none !important;
}

.table-wrapper {
  width: 100%;
  overflow-x: auto;
}

.products-table {
  width: 100%;
  border-collapse: collapse;
}

.products-table th {
  background: var(--primary);
  color: white;
  padding: 10px 12px;
  text-align: left;
  font-size: 0.8rem;
  text-transform: uppercase;
  white-space: nowrap;
}

.products-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.products-table tbody tr:hover {
  background: var(--bg);
}

.products-table input {
  background: white;
}

.btn-remove {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.1rem;
}

.totals-section {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.totals-display {
  margin-top: 8px;
}

.total-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.total-row.grand {
  font-weight: 700;
  font-size: 1.15rem;
  border-top: 2px solid var(--primary);
  border-bottom: none;
  margin-top: 4px;
}

.payment-status-badge {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 10px;
}

.status-paid,
[data-status='paid'] {
  background: #e8f5e9;
  color: var(--success);
}

.status-partial,
[data-status='partial'] {
  background: var(--accent-light);
  color: var(--warning);
}

.status-unpaid,
[data-status='unpaid'] {
  background: #ffebee;
  color: var(--danger);
}

.btn-primary {
  background: var(--primary);
  color: white;
  border: none;
  padding: 14px 36px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}

.btn-primary:hover {
  background: #2a2a4e;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26, 26, 46, 0.3);
}

.btn-primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-accent {
  background: var(--accent);
  color: var(--primary);
  border: none;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-accent:hover {
  background: #e6951a;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-body);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.btn-danger {
  background: #ffebee;
  color: var(--danger);
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 24px;
  gap: 10px;
}

.invoices-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.invoices-table th {
  background: var(--primary);
  color: white;
  padding: 14px 16px;
  text-align: left;
  font-size: 0.8rem;
  text-transform: uppercase;
  white-space: nowrap;
}

.invoices-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.invoices-table tbody tr:hover {
  background: var(--bg);
}

.loading-cell {
  text-align: center;
  color: var(--text-muted);
  padding: 36px !important;
}

.table-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.invoice-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  align-items: center;
  flex-wrap: wrap;
}

.invoice-card {
  background: white;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.invoice-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--primary);
}

.invoice-title-text {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-top: 8px;
}

.invoice-subtitle {
  color: var(--text-muted);
  margin-top: 4px;
}

.invoice-company {
  text-align: right;
  max-width: 60%;
}

.invoice-company h3 {
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.invoice-company p {
  color: var(--text-muted);
  line-height: 1.5;
}

.invoice-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.meta-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 6px;
}

.meta-value {
  font-weight: 600;
  font-size: 1rem;
}

.bill-to-box {
  background: var(--bg);
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  margin-bottom: 20px;
}

.bill-to-box h4 {
  margin-bottom: 4px;
}

.bill-to-box p {
  color: var(--text-muted);
  line-height: 1.45;
}

.totals-block-view {
  width: min(360px, 100%);
  margin-left: auto;
  margin-top: 18px;
}

.summary-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.summary-box {
  border-radius: 8px;
  padding: 14px;
  text-align: center;
}

.summary-box label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.7px;
}

.summary-box strong {
  font-size: 1.3rem;
}

.summary-box.paid {
  background: #e8f5e9;
  color: var(--success);
}

.summary-box.remaining {
  background: var(--accent-light);
  color: var(--warning);
}

.note-section {
  margin-top: 24px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.note-section p {
  color: #555;
  line-height: 1.6;
}

.payment-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg);
  border-radius: 8px;
  margin-bottom: 8px;
}

.payment-item-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.payment-amount {
  font-weight: 700;
  color: var(--success);
  font-size: 1.05rem;
}

.payment-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.empty-state {
  color: var(--text-muted);
  padding: 16px;
  background: var(--bg);
  border-radius: 8px;
}

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: white;
  border-radius: var(--radius);
  padding: 32px;
  width: 420px;
  max-width: 95vw;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.modal h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.modal-actions {
  margin-top: 8px;
}

.search-bar {
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  width: 100%;
  max-width: 360px;
  font-size: 0.95rem;
  margin-bottom: 20px;
}

@media (max-width: 1024px) {
  .create-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .form-row,
  .totals-controls-row {
    grid-template-columns: 1fr;
  }

  .invoice-meta-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .invoice-header {
    flex-direction: column;
  }

  .invoice-company {
    text-align: left;
    max-width: 100%;
  }

  .nav-logout-form {
  margin: 0;
}

.nav-logout-btn {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.2s;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.nav-logout-btn:hover {
  color: white;
  background: rgba(255, 255, 255, 0.1);
}
.main-content {
    padding: 20px 16px;
  }

  .navbar {
    padding: 0 16px;
  }

  .nav-brand {
    font-size: 1.1rem;
  }

  .modal {
    padding: 24px 20px;
  }

  .table-actions {
    flex-wrap: wrap;
  }
}