*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  max-width: 1200px;
  margin: 0 auto;
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
}

/* Variables */
:root {
  --primary-color: #3498db;
  --secondary-color: #2ecc71;
  --accent-color: #e74c3c;
  --background-color: #ffffff;
  --surface-color: #f8f9fa;
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --border-color: #e1e8ed;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --background-color: #1a1a1a;
    --surface-color: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* Layout Containers */
.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

/* Header */
.header {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0;
}

.header p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin: 0.5rem 0;
}

/* Search Sections */
.search-section {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#saved-search {
  display: none; 
}

.search-input {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--background-color);
  color: var(--text-primary);
  min-width: 200px;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Buttons */
.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

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

.btn-primary:hover {
  background-color: #2980b9;
}

.btn-secondary {
  background-color: var(--surface-color);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-color);
}

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

.btn-danger:hover {
  background-color: #c0392b;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Navigation Button */
.nav-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.nav-btn:hover {
  background: #2980b9;
  transform: scale(1.05);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--border-color);
}

/* Sections */
.section {
  background: var(--surface-color);
  padding: 1rem 1rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  margin: 1rem auto;
}

/* Section Visibility */
.saved-section {
  display: none;
}

.saved-section.active {
  display: block;
}

.library-section.active {
  display: block;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-header h2 {
  color: var(--text-primary);
  margin: 0;
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.page-info {
  font-weight: 600;
  color: var(--text-secondary);
}

/* Grid Layouts */
.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

/* Color Card */
.palette-card {
  background: var(--background-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  transition: var(--transition);
  position: relative;
  border: 1px solid var(--border-color);
}

.palette-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.color-swatch {
  width: 100%;
  height: 80px;
  border-radius: var(--border-radius);
  margin-bottom: 0.5rem;
}

.palette-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.hex-code {
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.hex-code:hover {
  color: var(--primary-color);
}

/* Actions */
.palette-actions {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  gap: 0.25rem;
}

.btn-save {
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: 4px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.8rem;
  transition: var(--transition);
}

.btn-save:hover {
  background: white;
  transform: scale(1.1);
}

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

/* Saved Section */
#saved-curated {
  display: none;
}

.saved-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.saved-palettes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

/* Feedback Toast */
.feedback-toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--primary-color);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transform: translateX(400px);
  opacity: 0;
  transition: var(--transition);
  z-index: 1000;
}

.feedback-toast.show {
  transform: translateX(0);
  opacity: 1;
}

.feedback-toast.success {
  background: var(--secondary-color);
}

.feedback-toast.error {
  background: var(--accent-color);
}

/* No results states */
.no-results,
.no-saved-palettes {
  text-align: center;
  color: var(--text-secondary);
  padding: 2rem;
  grid-column: 1 / -1;
}


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

  .search-section {
    width: 100%;
    justify-content: center;
  }

  .search-input {
    min-width: auto;
    flex: 1;
  }

  .section-header {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .pagination-controls {
    flex-wrap: wrap;
    justify-content: center;
  }

  .color-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
  }

  .palette-card {
    padding: 0.75rem;
  }

  .color-swatch {
    height: 70px;
  }

  .palette-name {
    font-size: 0.9rem;
  }

  .hex-code {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  body {
    max-width: 100%;
    padding: 0 0.5rem;
  }

  .color-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.5rem;
  }

  .section {
    padding: 0.75rem;
    margin: 0.5rem auto;
  }

  .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }

  .search-input {
    padding: 0.4rem 0.8rem;
  }

  .palette-actions {
    top: 0.25rem;
    right: 0.25rem;
  }

  .btn-save {
    width: 22px;
    height: 22px;
    font-size: 0.7rem;
  }
}