:root {
  --color-primary: #FF8C42;
  --color-secondary: #4CAF50;
  --color-accent: #2196F3;
  --color-text-light: #1a1a1a;
  --color-text-dark: #ffffff;
  --color-bg-light: #ffffff;
  --color-bg-dark: #0f0f10;
  --color-card-light: #f8f9fa;
  --color-card-dark: #1a1a1b;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.16);
}

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

body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--color-bg-light);
  color: var(--color-text-light);
  transition: background-color 0.3s ease, color 0.3s ease;
  line-height: 1.6;
}

[data-theme="dark"] {
  background-color: var(--color-bg-dark);
  color: var(--color-text-dark);
}

[data-theme="dark"] .tool-card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .search-input {
  background-color: var(--color-card-dark);
  color: var(--color-text-dark);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.navbar {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-text-dark);
  padding: 1rem 0;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: rotate(15deg);
}

[data-theme="light"] .moon-icon,
[data-theme="dark"] .sun-icon {
  display: none;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #ff6b1a 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.btn-sm:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Search and Filter */
.tools-section {
  padding: 4rem 0;
}

.search-filter-bar {
  margin-bottom: 3rem;
}

.search-input {
  width: 100%;
  padding: 1rem 1.5rem;
  border-radius: 0.75rem;
  border: 2px solid #e0e0e0;
  font-size: 1rem;
  background-color: var(--color-card-light);
  transition: all 0.3s ease;
  margin-bottom: 1.5rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 140, 66, 0.1);
}

.category-filters {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border-radius: 2rem;
  border: 2px solid var(--color-primary);
  background: transparent;
  color: var(--color-primary);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.tool-card {
  background-color: var(--color-card-light);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.tool-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.tool-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text-light);
}

[data-theme="dark"] .tool-name {
  color: var(--color-text-dark);
}

.tool-description {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 1rem;
}

[data-theme="dark"] .tool-description {
  color: #aaa;
}

.tool-category {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(255, 140, 66, 0.1);
  color: var(--color-primary);
}

/* Footer */
.footer {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
  color: white;
  padding: 2rem 0;
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-logo {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.footer-links a:hover {
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .nav-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  .category-filters {
    justify-content: center;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}