@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  --primary: #f47b20;
  --primary-dark: #d55a00;
  --primary-light: rgba(244, 123, 32, 0.1);
  --dark-bg: #0f172a;
  --sidebar-active: #1e293b;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.1);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  display: flex;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--text-main);
}

a {
  text-decoration: none;
  color: inherit;
}

/* --- App Shell (Layout) --- */
.app-container {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--dark-bg);
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  padding: 24px;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: var(--transition);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
  padding: 8px;
}

.brand-icon {
  background-color: var(--primary);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
  box-shadow: 0 0 15px rgba(244, 123, 32, 0.4);
}

.brand-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.sidebar-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.menu-item a {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  color: #94a3b8;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.menu-item a span {
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.menu-item a:hover {
  background-color: var(--sidebar-active);
  color: #ffffff;
}

.menu-item.active a {
  background-color: var(--primary);
  color: #ffffff;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}

.user-info {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.user-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: #ffffff;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.user-email {
  font-size: 0.75rem;
  color: #64748b;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}

.btn-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background-color: rgba(255, 255, 255, 0.05);
  color: #f8fafc;
  padding: 10px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  width: 100%;
  transition: var(--transition);
}

.btn-logout:hover {
  background-color: var(--danger);
  color: white;
}

/* Main Content Area */
.main-content {
  flex: 1;
  margin-left: 280px;
  padding: 40px;
  min-height: 100vh;
}

/* --- Login Page --- */
.login-body {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 100vh;
  background: radial-gradient(circle at top right, rgba(244, 123, 32, 0.08), transparent 40%), var(--dark-bg);
  padding: 24px;
}

.login-card {
  background-color: rgba(30, 41, 59, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 48px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  text-align: center;
  color: white;
}

.login-logo {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 16px;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.login-card h2 {
  font-size: 2rem;
  margin-bottom: 8px;
  color: white;
}

.login-subtitle {
  color: #94a3b8;
  font-size: 0.95rem;
  margin-bottom: 32px;
}

.login-button-container {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.dev-login-divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  color: #64748b;
  font-size: 0.85rem;
}

.dev-login-divider::before,
.dev-login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.1);
  margin: 0 16px;
}

.dev-login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
}

.dev-login-form label {
  font-size: 0.85rem;
  color: #ffffff;
  font-weight: 600;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
}

.dev-login-form .form-input {
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
}

.dev-login-form .form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(244, 123, 32, 0.2);
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(244, 123, 32, 0.4);
}

.btn-danger {
  background-color: var(--danger);
  color: white;
  border: none;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
}

.btn-danger:hover {
  background-color: #c53030;
  box-shadow: 0 4px 12px rgba(229, 62, 62, 0.4);
}

.alert-danger {
  background-color: var(--danger-light);
  border: 1px solid var(--danger);
  color: #fc8181;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 24px;
  text-align: left;
}

.alert-success {
  background-color: var(--success-light);
  border: 1px solid var(--success);
  color: var(--success);
  padding: 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 24px;
  text-align: left;
}

/* --- Dashboard --- */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
}

.dashboard-title h1 {
  font-size: 2.25rem;
  letter-spacing: -0.5px;
}

.dashboard-title p {
  color: var(--text-muted);
  font-weight: 500;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.stat-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.stat-icon.total { background-color: var(--primary-light); color: var(--primary); }
.stat-icon.paid { background-color: var(--success-light); color: var(--success); }
.stat-icon.pending { background-color: var(--warning-light); color: var(--warning); }
.stat-icon.draft { background-color: rgba(100, 116, 139, 0.1); color: var(--text-muted); }

.stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

/* Tables and Lists */
.card-section {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: 1.5rem;
  letter-spacing: -0.5px;
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  white-space: nowrap;
}

.custom-table th {
  padding: 16px;
  border-bottom: 2px solid var(--border-color);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.custom-table td {
  padding: 18px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}

.custom-table tr:last-child td {
  border-bottom: none;
}

.custom-table tbody tr {
  transition: var(--transition);
}

.custom-table tbody tr:hover {
  background-color: rgba(248, 250, 252, 0.8);
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge.paid { background-color: var(--success-light); color: var(--success); }
.badge.paid::before { background-color: var(--success); }

.badge.pending { background-color: var(--warning-light); color: var(--warning); }
.badge.pending::before { background-color: var(--warning); }

.badge.draft { background-color: rgba(100, 116, 139, 0.1); color: var(--text-muted); }
.badge.draft::before { background-color: var(--text-muted); }

/* Buttons & Actions */
.btn-action {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-action:hover {
  border-color: var(--primary);
  color: var(--primary);
  background-color: var(--primary-light);
}

.actions-cell {
  display: flex;
  gap: 8px;
}

/* --- Invoice Form (Editor) --- */
.invoice-editor {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  padding-right: 40px;
}

/* Invoice Items Table */
.items-editor-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  margin-bottom: 24px;
}

.items-editor-table th {
  text-align: left;
  padding: 12px;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.items-editor-table td {
  padding: 12px 6px;
  vertical-align: middle;
}

.btn-add-item {
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px dashed var(--primary);
  width: 100%;
  padding: 12px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
}

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

.btn-remove-item {
  color: var(--danger);
  background-color: var(--danger-light);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.btn-remove-item:hover {
  background-color: var(--danger);
  color: white;
}

/* Summary Box */
.invoice-summary-box {
  border-top: 2px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.summary-row {
  display: grid;
  grid-template-columns: 120px 140px;
  align-items: center;
  text-align: right;
  font-size: 0.95rem;
}

.summary-row.total {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  border-top: 1px solid var(--border-color);
  padding-top: 8px;
}

/* Sidebar Actions Panel */
.actions-sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.sidebar-card h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

/* --- Client Modal & Actions --- */
.client-form-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* --- Invoice Detail View --- */
.detail-container {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
}

.invoice-preview-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 48px;
  box-shadow: var(--shadow-md);
  position: relative;
}

.invoice-preview-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 40px;
}

.company-branding h2 {
  color: var(--primary);
  font-size: 1.5rem;
}

.invoice-preview-title {
  text-align: right;
}

.invoice-preview-title h1 {
  font-size: 2.25rem;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 12px;
}

.meta-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
}

.meta-info-block h4 {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.preview-items-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 40px;
}

.preview-items-table th {
  text-align: left;
  padding: 12px;
  border-bottom: 2px solid var(--border-color);
  background-color: var(--bg-main);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
}

.preview-items-table td {
  padding: 16px 12px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.95rem;
}

.btn-block {
  width: 100%;
  display: flex;
  margin-bottom: 12px;
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
}

.btn-secondary:hover {
  background-color: var(--bg-main);
  border-color: var(--text-muted);
}

/* Toast Messages */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 16px 24px;
  border-radius: var(--radius-sm);
  background-color: var(--dark-bg);
  color: white;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.success { border-left: 4px solid var(--success); }
.toast.danger { border-left: 4px solid var(--danger); }

/* --- Mobile Header Bar Styles --- */
.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  background-color: var(--dark-bg);
  padding: 12px 16px;
  position: sticky;
  top: 0;
  z-index: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.mobile-header button {
  background: none;
  border: none;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-brand {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: white;
  letter-spacing: 0.5px;
}

/* --- Desktop Styles for Floating Actions --- */
.bottom-floating-actions {
  position: fixed;
  bottom: 20px;
  left: 320px;
  right: 40px;
  display: flex;
  gap: 12px;
  z-index: 1000;
}

/* --- Responsive Media Queries --- */
@media (max-width: 768px) {
  body {
    flex-direction: column;
  }
  
  .mobile-header {
    display: flex;
  }
  
  #sidebar-close {
    display: block !important;
  }
  
  .sidebar {
    transform: translateX(-100%);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    height: 100vh;
    z-index: 999;
    box-shadow: none;
  }
  
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 5px 0 25px rgba(0, 0, 0, 0.4);
  }
  
  .main-content {
    margin-left: 0;
    padding: 20px;
    width: 100%;
  }
  
  .stats-grid {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }
  
  .invoice-editor {
    display: flex !important;
    flex-direction: column !important;
    gap: 20px;
  }
  
  .reverse-on-mobile {
    display: flex !important;
    flex-direction: column-reverse !important;
  }
  
  .form-row {
    flex-direction: column !important;
    gap: 16px !important;
  }
  
  .bottom-floating-actions {
    position: fixed !important;
    bottom: 16px !important;
    left: 16px !important;
    right: 16px !important;
  }

  .card-section {
    padding: 20px !important;
  }

  .detail-container {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .invoice-preview-card {
    padding: 20px !important;
  }
  
  .custom-table {
    width: 100%;
  }
}

/* Auth Form Overrides */
.login-card label {
  color: #ef4444 !important;
  font-weight: 600;
}
.btn-google {
  background-color: #ffffff;
  color: #333333;
  border: 1px solid #d1d5db;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  margin-bottom: 16px;
  transition: background-color 0.2s;
  cursor: pointer;
}
.btn-google:hover {
  background-color: #f3f4f6;
}
.btn-google img {
  width: 20px;
  height: 20px;
}
.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 16px 0;
  color: #64748b;
  font-size: 0.85rem;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid #e2e8f0;
}
.auth-divider:not(:empty)::before {
  margin-right: 1em;
  color: white;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.success { border-left: 4px solid var(--success); }
.toast.danger { border-left: 4px solid var(--danger); }

/* --- Mobile Header Bar Styles --- */
.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  background-color: var(--dark-bg);
  padding: 12px 16px;
  position: sticky;
  top: 0;
  z-index: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.mobile-header button {
  background: none;
  border: none;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-brand {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: white;
  letter-spacing: 0.5px;
}

/* --- Desktop Styles for Floating Actions --- */
.bottom-floating-actions {
  position: fixed;
  bottom: 20px;
  left: 320px;
  right: 40px;
  display: flex;
  gap: 12px;
  z-index: 1000;
}

/* --- Responsive Media Queries --- */
@media (max-width: 1024px) {
  body {
    flex-direction: column;
  }
  
  .mobile-header {
    display: flex;
  }
  
  #sidebar-close {
    display: block !important;
  }
  
  .sidebar {
    transform: translateX(-100%);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    height: 100vh;
    z-index: 999;
    box-shadow: none;
  }
  
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 5px 0 25px rgba(0, 0, 0, 0.4);
  }
  
  .main-content {
    margin-left: 0;
    padding: 20px;
    width: 100%;
  }
  
  .stats-grid {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }
  
  .invoice-editor {
    display: flex !important;
    flex-direction: column !important;
    gap: 20px;
  }
  
  .reverse-on-mobile {
    display: flex !important;
    flex-direction: column-reverse !important;
  }
  
  .form-row {
    flex-direction: column !important;
    gap: 16px !important;
  }
  
  .bottom-floating-actions {
    position: fixed !important;
    bottom: 16px !important;
    left: 16px !important;
    right: 16px !important;
  }

  .card-section {
    padding: 20px !important;
  }

  .detail-container {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .invoice-preview-card {
    padding: 20px !important;
  }
  
  .custom-table {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* Auth Form Overrides */
.login-card label {
  color: #ef4444 !important;
  font-weight: 600;
}
.btn-google {
  background-color: #ffffff;
  color: #333333;
  border: 1px solid #d1d5db;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  margin-bottom: 16px;
  transition: background-color 0.2s;
  cursor: pointer;
}
.btn-google:hover {
  background-color: #f3f4f6;
}
.btn-google img {
  width: 20px;
  height: 20px;
}
.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 16px 0;
  color: #64748b;
  font-size: 0.85rem;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid #e2e8f0;
}
.auth-divider:not(:empty)::before {
  margin-right: 1em;
}
.auth-divider:not(:empty)::after {
  margin-left: 1em;
}

/* =========================================
   RESPONSIVE DESIGN (MOBILE & TABLET)
========================================= */

/* Mobile Header (Hamburger Menu) */
.mobile-header {
  display: none;
  background-color: var(--dark-bg);
  color: white;
  padding: 15px 20px;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 110;
  box-shadow: var(--shadow-md);
}

.mobile-header .brand-icon {
  width: 32px;
  height: 32px;
  font-size: 1rem;
}

.hamburger-btn {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 1024px) {
  /* Layout adjustments */
  .mobile-header {
    display: flex;
  }
  
  .sidebar {
    transform: translateX(-100%);
    width: 260px;
    padding-top: 80px; /* Space for mobile header */
  }
  
  .sidebar.active {
    transform: translateX(0);
    box-shadow: 4px 0 20px rgba(0,0,0,0.5);
  }
  
  .main-content {
    margin-left: 0 !important;
    padding: 80px 15px 20px 15px !important; /* Top padding for fixed mobile header */
  }
  
  /* Grids */
  .stats-grid,
  .reports-grid {
    grid-template-columns: 1fr !important;
    gap: 15px;
  }
  
  /* Tables */
  .table-responsive {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
  }
  
  .custom-table, .data-table {
    min-width: 700px; /* Force minimum width to enable scrolling */
  }

  /* Typography & Spacing */
  .dashboard-title h1 {
    font-size: 1.75rem;
  }
  
  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
  }
  
  .dashboard-header .btn-primary {
    width: 100%;
  }

  /* Forms & Buttons */
  .form-row, .split-row {
    flex-direction: column !important;
    gap: 15px !important;
  }
  
  .form-group {
    width: 100% !important;
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

.totals-and-notes-grid {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 20px;
}

/* --- Samsung Galaxy Z Fold & Mobile Responsive Adjustments --- */
@media (max-width: 900px) {
  .detail-container {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .totals-and-notes-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .invoice-preview-card {
    padding: 20px 16px !important;
    border-radius: var(--radius-md) !important;
  }

  .invoice-preview-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 16px !important;
  }

  .invoice-preview-title {
    text-align: left !important;
  }

  .invoice-preview-title h1 {
    font-size: 1.75rem !important;
  }

  .meta-info-grid {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
    margin-bottom: 24px !important;
    padding-bottom: 20px !important;
  }

  .meta-info-block {
    text-align: left !important;
  }

  /* Responsive Items Table for Samsung Fold & Mobile Screens */
  .preview-items-table, 
  .preview-items-table thead, 
  .preview-items-table tbody, 
  .preview-items-table th, 
  .preview-items-table td, 
  .preview-items-table tr {
    display: block !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .preview-items-table thead tr {
    position: absolute !important;
    top: -9999px !important;
    left: -9999px !important;
  }

  .preview-items-table tr {
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    padding: 14px !important;
    margin-bottom: 14px !important;
    background-color: var(--bg-main) !important;
  }

  .preview-items-table td {
    border: none !important;
    padding: 6px 0 !important;
    position: relative !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: flex-start !important;
    font-size: 0.9rem !important;
    text-align: left !important;
    gap: 12px !important;
  }

  .preview-items-table td:first-child {
    display: block !important;
    margin-bottom: 10px !important;
    padding-bottom: 10px !important;
    border-bottom: 1px dashed var(--border-color) !important;
  }

  .preview-items-table td:not(:first-child)::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    flex-shrink: 0;
    max-width: 40% !important;
  }

  /* Mobile Card Table for Invoices & Estimates */
  .mobile-card-table {
    min-width: 100% !important;
    width: 100% !important;
    display: block !important;
    box-sizing: border-box !important;
  }
  .mobile-card-table thead {
    display: none !important;
  }
  .mobile-card-table tbody {
    display: block !important;
    width: 100% !important;
  }
  .mobile-card-table tbody tr {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    box-sizing: border-box !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    margin-bottom: 16px !important;
    padding: 16px !important;
    background: white !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04) !important;
  }
  .mobile-card-table td {
    display: flex !important;
    justify-content: space-between !important;
    align-items: flex-start !important;
    width: 100% !important;
    max-width: none !important;
    box-sizing: border-box !important;
    border: none !important;
    border-bottom: 1px solid #f1f5f9 !important;
    padding: 10px 0 !important;
    text-align: right !important;
    font-size: 0.95rem !important;
    white-space: normal !important;
    word-break: normal !important;
    overflow-wrap: break-word !important;
    gap: 12px !important;
  }
  .mobile-card-table td:last-child {
    border-bottom: none !important;
    justify-content: flex-end !important;
    padding-top: 12px !important;
    padding-bottom: 0 !important;
  }
  .mobile-card-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-muted);
    margin-right: 0 !important;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    flex-shrink: 0;
    max-width: 45% !important;
    text-align: left !important;
    word-break: normal !important;
    overflow-wrap: break-word !important;
  }
  .mobile-card-table td > span,
  .mobile-card-table td > div,
  .mobile-card-table td > strong,
  .mobile-card-table td > a,
  .mobile-card-table td > form {
    max-width: 100% !important;
    word-break: normal !important;
    overflow-wrap: break-word !important;
    text-align: right !important;
  }

  /* Mobile AI Prompt Textarea Expansion */
  .ai-prompt-textarea {
    min-height: 125px !important;
    font-size: 1rem !important;
    padding: 14px !important;
    border-radius: 10px !important;
    line-height: 1.5 !important;
  }
}