/* CSS Custom Properties for Theme */
:root {
  --bg-color: #f8f9fa;
  --surface-color: #ffffff;
  --text-color: #212529;
  --text-muted: #6c757d;
  --border-color: #dee2e6;
  --accent-color: #e74c3c;
  --accent-hover: #c0392b;
  --success-color: #27ae60;
  --shadow: 0 2px 10px rgba(0,0,0,0.1);
  --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --surface-color: #2d2d2d;
  --text-color: #ffffff;
  --text-muted: #b3b3b3;
  --border-color: #404040;
  --accent-color: #ff6b6b;
  --accent-hover: #ff5252;
  --success-color: #4ecdc4;
  --shadow: 0 2px 10px rgba(0,0,0,0.3);
  --shadow-hover: 0 5px 20px rgba(0,0,0,0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
}

/* Navigation */
.navbar {
  background: var(--surface-color);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  margin: 0;
}

.theme-btn {
  background: none;
  border: 2px solid var(--border-color);
  padding: 8px 12px;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1.2rem;
  transition: var(--transition);
}

.theme-btn:hover {
  background: var(--accent-color);
  border-color: var(--accent-color);
  transform: scale(1.05);
}

/* Main Container */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Filters Section */
.filters-section {
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-container input {
  width: 100%;
  padding: 1rem 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--surface-color);
  color: var(--text-color);
  font-size: 1.1rem;
  transition: var(--transition);
}

.search-container input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.filter-container {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.filter-container select {
  flex: 1;
  min-width: 200px;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--surface-color);
  color: var(--text-color);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-container select:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* Stats Bar */
.stats-bar {
  display: flex;
  justify-content: space-around;
  background: var(--surface-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-color);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Recipes Grid */
.recipes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.recipe-card {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.recipe-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-color);
}

.recipe-image {
  height: 200px;
  background: linear-gradient(135deg, var(--accent-color), var(--success-color));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
}

.recipe-difficulty {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 20px;
  font-size: 0.8rem;
}

.recipe-content {
  padding: 1.5rem;
}

.recipe-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.recipe-category {
  color: var(--accent-color);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.recipe-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.recipe-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  background: var(--border-color);
  color: var(--text-color);
  padding: 0.25rem 0.5rem;
  border-radius: 15px;
  font-size: 0.8rem;
}

/* Loading and No Results */
.loading {
  text-align: center;
  padding: 3rem;
}

.spinner {
  font-size: 3rem;
  animation: spin 2s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.no-results {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.no-results-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  z-index: 1000;
  backdrop-filter: blur(5px);
}

.modal-content {
  position: relative;
  background: var(--surface-color);
  margin: 5% auto;
  padding: 0;
  width: 90%;
  max-width: 800px;
  max-height: 80vh;
  border-radius: var(--border-radius);
  overflow-y: auto;
  box-shadow: var(--shadow-hover);
}

.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  background: var(--accent-color);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  z-index: 1001;
  transition: var(--transition);
}

.modal-close:hover {
  transform: scale(1.1);
  background: var(--accent-hover);
}

.modal-body {
  padding: 2rem;
}

/* Recipe Detail Styling */
.recipe-detail-header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
}

.recipe-detail-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--accent-color);
}

.recipe-detail-meta {
  display: flex;
  justify-content: space-around;
  background: var(--bg-color);
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
}

.portion-calculator {
  background: var(--surface-color);
  border: 2px solid var(--border-color);
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  text-align: center;
}

.portion-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}

.portion-btn {
  background: var(--accent-color);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
}

.portion-btn:hover {
  background: var(--accent-hover);
}

.ingredients-list, .instructions-list {
  margin-bottom: 2rem;
}

.ingredients-list h3, .instructions-list h3 {
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.ingredient-item {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.instruction-item {
  margin-bottom: 1rem;
  padding: 1rem;
  background: var(--bg-color);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--accent-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
  }

  .main-container {
    padding: 1rem;
  }

  .filter-container {
    flex-direction: column;
  }

  .filter-container select {
    min-width: unset;
  }

  .stats-bar {
    flex-direction: column;
    gap: 1rem;
  }

  .recipes-grid {
    grid-template-columns: 1fr;
  }

  .modal-content {
    width: 95%;
    margin: 2% auto;
  }

  .recipe-detail-meta {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .nav-title {
    font-size: 1.2rem;
  }

  .recipe-image {
    height: 150px;
    font-size: 3rem;
  }

  .recipe-content {
    padding: 1rem;
  }
}