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

:root {
  /* Color Palette - Blue Theme */
  --color-primary: #1e40af;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1e3a8a;
  --color-accent: #0ea5e9;
  --color-accent-light: #38bdf8;
  --color-accent-dark: #0284c7;
  
  /* Neutral Backgrounds */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  
  /* Text Colors */
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  
  /* Border Colors */
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  line-height: 1.6;
  font-size: 16px;
  font-weight: 400;
}

/* Header Styles */
.header {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-lg) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.header-left h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
}

.header-left p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  font-weight: 400;
}

.header-right {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.btn-suggest {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background-color: var(--color-primary);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.btn-suggest:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-about {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-about:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* Search Section */
.search-section {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-lg) 0;
}

.search-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.search-input-wrapper {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
}

.search-input {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 3rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 400;
  background-color: var(--color-bg-primary);
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(30 64 175 / 0.1);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

/* Filters Section */
.filters-section {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-lg) 0;
}

.filters-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.filter-group {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.filter-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-dropdown {
  position: relative;
  display: inline-block;
}

.filter-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 140px;
}

.filter-trigger:hover {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.filter-trigger.active {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.filter-trigger svg {
  transition: transform 0.2s ease;
}

.filter-trigger.active svg {
  transform: rotate(180deg);
}

.filter-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 50;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  margin-top: var(--spacing-sm);
  min-width: 200px;
}

.filter-dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.filter-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: background-color 0.2s ease;
  border-bottom: 1px solid var(--color-border-light);
}

.filter-option:last-child {
  border-bottom: none;
}

.filter-option:hover {
  background-color: var(--color-bg-tertiary);
}

.filter-option.selected {
  background-color: var(--color-primary);
  color: white;
}

.filter-option.selected:hover {
  background-color: var(--color-primary-dark);
}

.filter-option .check-icon {
  opacity: 0;
  transition: opacity 0.2s ease;
}

.filter-option.selected .check-icon {
  opacity: 1;
}

/* Active Filters */
.active-filters {
  background-color: var(--color-bg-primary);
  padding: var(--spacing-md) 0;
  min-height: 60px;
}

.active-filters .filters-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  align-items: center;
}

.active-filter-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background-color: var(--color-accent-light);
  color: var(--color-primary-dark);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
}

.active-filter-tag .remove-btn {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  font-size: 1.2rem;
  line-height: 1;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
}

.active-filter-tag .remove-btn:hover {
  background-color: rgba(0, 0, 0, 0.1);
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.groups-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.groups-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.sort-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sort-btn:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.sort-btn svg {
  transition: transform 0.2s ease;
}

.sort-btn.asc svg {
  transform: rotate(180deg);
}

/* Groups List */
.groups-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.group-item {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.2s ease;
  cursor: pointer;
}

.group-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.group-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
}

.group-info {
  flex: 1;
}

.group-name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.group-description {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: var(--spacing-md);
}

.group-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.group-tag {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.group-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.group-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.group-link:hover {
  color: var(--color-primary-dark);
}

.group-link svg {
  transition: transform 0.2s ease;
}

.group-link:hover svg {
  transform: translateX(2px);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

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

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.modal-close:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

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

.modal-body p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

/* Form Styles */
.suggest-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.form-group label {
  font-weight: 500;
  color: var(--color-text-primary);
  font-size: 0.875rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: inherit;
  transition: all 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(30 64 175 / 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  border: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

/* About Features */
.about-features {
  margin-top: var(--spacing-lg);
}

.about-features h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

.about-features ul {
  list-style: none;
  padding: 0;
}

.about-features li {
  padding: var(--spacing-sm) 0;
  color: var(--color-text-secondary);
  position: relative;
  padding-left: var(--spacing-lg);
}

.about-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

/* No Results State */
.no-results {
  text-align: center;
  padding: var(--spacing-2xl);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
}

.no-results p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.no-results p:first-child {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

/* Notification Styles */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease-out;
  max-width: 400px;
}

.notification.success {
  background-color: #10b981;
  color: white;
  border: 1px solid #059669;
}

.notification.error {
  background-color: #ef4444;
  color: white;
  border: 1px solid #dc2626;
}

.notification-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }
  
  .header-right {
    width: 100%;
    justify-content: space-between;
  }
  
  .filters-container {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  .filter-group {
    min-width: auto;
  }
  
  .filter-dropdown {
    width: 100%;
  }
  
  .filter-trigger {
    width: 100%;
    justify-content: space-between;
  }
  
  .groups-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }
  
  .group-item {
    padding: var(--spacing-md);
  }
  
  .group-header {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .group-actions {
    justify-content: flex-start;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .btn-suggest,
  .btn-about {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .header-left h1 {
    font-size: 1.5rem;
  }
  
  .search-input {
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) 2.5rem;
  }
  
  .search-icon {
    left: var(--spacing-sm);
  }
  
  .filter-trigger {
    font-size: 0.8rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .group-name {
    font-size: 1rem;
  }
  
  .modal-content {
    width: 95%;
    margin: var(--spacing-md);
  }
}