/* ============================================
   123 TAX SOLUTIONS - MAIN STYLESHEET
   Mobile-first responsive design
   ============================================ */

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --primary-green: #10B981;
  --secondary-blue: #3B82F6;
  --accent-yellow: #FBBF24;
  --bg-white: #FFFFFF;
  --bg-gray: #F3F4F6;
  --text-dark: #1F2937;
  --text-gray: #6B7280;
  --border-gray: #E5E7EB;
  --success: #10B981;
  --error: #EF4444;
  --warning: #F59E0B;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  color: var(--text-dark);
  background-color: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-gray);
}

a {
  color: var(--secondary-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-green);
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Header */
.header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-gray);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav {
  display: none;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-link {
  color: var(--text-gray);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary-green);
}

.header-actions {
  display: flex;
  gap: var(--space-sm);
}

.mobile-menu-toggle {
  display: block;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-xs);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  min-height: 50px;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.95);
}

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

.btn-primary:hover {
  background: #059669;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--secondary-blue);
  color: white;
}

.btn-secondary:hover {
  background: #2563EB;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-accent {
  background: var(--accent-yellow);
  color: var(--text-dark);
}

.btn-accent:hover {
  background: #F59E0B;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-green);
  color: var(--primary-green);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-gray);
}

.btn-ghost:hover {
  background: var(--bg-gray);
}

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 1.125rem;
  min-height: 60px;
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: white;
  padding: var(--space-2xl) 0;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  color: white;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--space-xl);
  color: rgba(255, 255, 255, 0.9);
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

.hero-note {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.875rem;
}

/* Stats Section */
.stats {
  padding: var(--space-xl) 0;
  background: var(--bg-white);
}

.stats-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

.stat-card {
  background: var(--bg-white);
  border: 2px solid var(--border-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-green);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: var(--space-xs);
}

.stat-label {
  color: var(--text-gray);
  font-size: 0.875rem;
}

/* Section */
.section {
  padding: var(--space-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-title {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  color: var(--text-gray);
  font-size: 1.125rem;
}

/* How It Works */
.steps {
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: 1fr;
}

.step {
  text-align: center;
  position: relative;
}

.step-icon {
  font-size: 4rem;
  margin-bottom: var(--space-md);
}

.step-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.step-description {
  color: var(--text-gray);
}

/* Cards */
.cards-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

.card {
  background: var(--bg-white);
  border: 2px solid var(--border-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-green);
}

.card-header {
  margin-bottom: var(--space-md);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: var(--space-sm);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.card-subtitle {
  color: var(--text-gray);
  font-size: 0.875rem;
}

.card-body {
  margin-bottom: var(--space-md);
}

.card-footer {
  margin-top: var(--space-md);
}

/* Badge */
.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-success {
  background: #D1FAE5;
  color: #065F46;
}

.badge-warning {
  background: #FEF3C7;
  color: #92400E;
}

.badge-primary {
  background: #DBEAFE;
  color: #1E3A8A;
}

/* Pricing Cards */
.pricing-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
  max-width: 900px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-white);
  border: 2px solid var(--border-gray);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary-green);
  border-width: 3px;
  box-shadow: var(--shadow-xl);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
}

.pricing-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.pricing-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: var(--space-xs);
}

.pricing-period {
  color: var(--text-gray);
  font-size: 0.875rem;
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-lg);
}

.pricing-feature {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--border-gray);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.pricing-feature:last-child {
  border-bottom: none;
}

/* Testimonials */
.testimonial {
  background: var(--bg-white);
  border: 2px solid var(--border-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.testimonial-rating {
  color: var(--accent-yellow);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.testimonial-text {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  color: var(--text-dark);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.testimonial-name {
  font-weight: 600;
  color: var(--text-dark);
}

.testimonial-role {
  color: var(--text-gray);
  font-size: 0.875rem;
}

/* Forms */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--text-dark);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--border-gray);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all var(--transition-fast);
  min-height: 50px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-green);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

.form-hint {
  color: var(--text-gray);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.checkbox-group input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* Upload Area */
.upload-area {
  border: 3px dashed var(--border-gray);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-base);
  cursor: pointer;
}

.upload-area:hover {
  border-color: var(--primary-green);
  background: var(--bg-gray);
}

.upload-area.dragover {
  border-color: var(--primary-green);
  background: rgba(16, 185, 129, 0.1);
}

.upload-icon {
  font-size: 4rem;
  margin-bottom: var(--space-md);
  color: var(--text-gray);
}

.upload-text {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.upload-hint {
  color: var(--text-gray);
  font-size: 0.875rem;
}

.upload-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

/* Image Preview */
.image-preview {
  margin-top: var(--space-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.image-preview img {
  width: 100%;
  height: auto;
  display: block;
}

/* Dashboard */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.dashboard-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.dashboard-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.dashboard-stats {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-xl);
}

.stat-card-dashboard {
  background: linear-gradient(135deg, var(--primary-green) 0%, #059669 100%);
  color: white;
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
}

.stat-card-dashboard .stat-value {
  color: white;
  font-size: 2.5rem;
}

.stat-card-dashboard .stat-label {
  color: rgba(255, 255, 255, 0.9);
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--space-sm);
  border-bottom: 2px solid var(--border-gray);
  margin-bottom: var(--space-lg);
  overflow-x: auto;
}

.tab {
  padding: var(--space-sm) var(--space-lg);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-gray);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab:hover {
  color: var(--primary-green);
}

.tab.active {
  color: var(--primary-green);
  border-bottom-color: var(--primary-green);
}

/* Table */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-gray);
}

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

.table thead {
  background: var(--bg-gray);
}

.table th {
  padding: var(--space-md);
  text-align: left;
  font-weight: 600;
  color: var(--text-dark);
  border-bottom: 2px solid var(--border-gray);
}

.table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-gray);
}

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

.table-thumbnail {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.table-actions {
  display: flex;
  gap: var(--space-xs);
}

.table-action-btn {
  padding: var(--space-xs) var(--space-sm);
  background: var(--bg-gray);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.table-action-btn:hover {
  background: var(--primary-green);
  color: white;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
}

.empty-state-icon {
  font-size: 5rem;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.empty-state-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.empty-state-description {
  color: var(--text-gray);
  margin-bottom: var(--space-lg);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-md);
}

.modal {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

.modal-header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border-gray);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-gray);
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-dark);
}

.modal-body {
  padding: var(--space-lg);
}

.modal-footer {
  padding: var(--space-lg);
  border-top: 1px solid var(--border-gray);
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 300px;
  animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

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

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

.toast-icon {
  font-size: 1.5rem;
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.toast-message {
  color: var(--text-gray);
  font-size: 0.875rem;
}

/* Loading Spinner */
.spinner {
  border: 3px solid var(--border-gray);
  border-top-color: var(--primary-green);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

/* Progress Bar */
.progress {
  height: 8px;
  background: var(--border-gray);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.progress-bar {
  height: 100%;
  background: var(--primary-green);
  transition: width var(--transition-base);
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: white;
  padding: var(--space-xl) 0 var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-content {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
  margin-bottom: var(--space-lg);
}

.footer-section h3 {
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: white;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  font-size: 1.5rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Responsive Design - Tablet */
@media (min-width: 641px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .dashboard-stats {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .upload-buttons {
    flex-direction: row;
    justify-content: center;
  }
  
  .hero-cta {
    flex-direction: row;
    justify-content: center;
  }
}

/* Responsive Design - Desktop */
@media (min-width: 1025px) {
  h1 { font-size: 3rem; }
  
  .nav {
    display: block;
  }
  
  .mobile-menu-toggle {
    display: none;
  }
  
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .hero h1 {
    font-size: 3.5rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    transform: scale(0.9);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

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

.animate-fadeIn {
  animation: fadeIn 0.5s ease;
}

.animate-scaleIn {
  animation: scaleIn 0.3s ease;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .btn,
  .mobile-menu-toggle {
    display: none;
  }
  
  body {
    font-size: 12pt;
  }
}