@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary-color: #4F46E5;
  --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #6366F1 100%);
  --bg-color: #F3F4F6;
  --card-bg: #FFFFFF;
  --text-main: #111827;
  --text-muted: #6B7280;
  --border-color: #E5E7EB;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius: 16px;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --bg-color: #0B0F19;
  --card-bg: #111827;
  --text-main: #F9FAFB;
  --text-muted: #9CA3AF;
  --border-color: #1F2937;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  transition: background-color 0.3s ease, color 0.3s ease;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* Utilities */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: calc(var(--radius) / 2);
  font-weight: 500;
  display: inline-block;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--card-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  border-radius: calc(var(--radius) / 2);
  font-weight: 500;
  display: inline-block;
  cursor: pointer;
  transition: var(--transition);
}

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

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2.5rem;
}

.badge {
  background-color: var(--bg-color);
  color: var(--text-muted);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Header */
header {
  position: sticky;
  top: 0;
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  transition: background-color 0.3s ease;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo svg {
  color: var(--primary-color);
  width: 28px;
  height: 28px;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text-main);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
  transition: var(--transition);
}

.theme-toggle:hover {
  color: var(--text-main);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 6rem 0 4rem;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: var(--text-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.search-wrapper {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  display: flex;
  box-shadow: var(--shadow-md);
  border-radius: 9999px;
  background-color: var(--card-bg);
  padding: 0.5rem;
}

.search-input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0 1.5rem;
  font-size: 1.125rem;
  color: var(--text-main);
  outline: none;
}

.search-btn {
  background: var(--primary-gradient);
  color: white;
  border: none;
  border-radius: 9999px;
  padding: 0.75rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.search-btn:hover {
  opacity: 0.9;
}

.popular-tags {
  margin-top: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.popular-tags span {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.popular-tags a {
  background-color: var(--card-bg);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.popular-tags a:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Categories Grid */
.categories-section {
  padding: 4rem 0;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.category-card {
  background-color: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: block;
  text-align: left;
}

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

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: calc(var(--radius) / 2);
  background: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--primary-color);
  font-size: 1.5rem;
}

.category-title {
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.category-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Featured Tools */
.featured-section {
  padding: 4rem 0;
  background-color: var(--card-bg);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.tool-card {
  background-color: var(--bg-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-color);
  background-color: var(--card-bg);
}

.tool-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.tool-logo {
  width: 56px;
  height: 56px;
  border-radius: calc(var(--radius) / 2);
  background-color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.tool-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tool-name {
  font-weight: 700;
  font-size: 1.25rem;
}

.tool-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tool-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.tool-footer {
  margin-top: auto;
}

.btn-visit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 0.75rem;
  border-radius: calc(var(--radius) / 2);
  color: var(--text-main);
  font-weight: 500;
  transition: var(--transition);
}

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

.tool-card:hover .btn-visit {
  background: var(--primary-gradient);
  color: white;
  border-color: transparent;
}

/* Why Use Section */
.text-section {
  padding: 5rem 0;
}

.text-content-wrapper {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.text-content-wrapper h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.text-content-wrapper p {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

/* Categories Text Section */
.categories-text-section {
  padding: 4rem 0;
  background-color: var(--card-bg);
}

.rtf-content {
  max-width: 800px;
  margin: 0 auto;
  color: var(--text-muted);
}

.rtf-content h3 {
  color: var(--text-main);
  margin: 2rem 0 1rem;
}

.rtf-content p {
  margin-bottom: 1rem;
}

.rtf-content ul {
  list-style: disc;
  margin-left: 2rem;
  margin-bottom: 1rem;
}

/* FAQ Section */
.faq-section {
  padding: 4rem 0;
}

.faq-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: calc(var(--radius) / 2);
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.5rem;
  background: none;
  border: none;
  color: var(--text-main);
  font-weight: 600;
  font-size: 1.125rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question svg {
  transition: transform 0.3s ease;
}

.faq-question.active svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-muted);
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding-bottom: 1.5rem;
}

/* Footer */
footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 1rem;
  max-width: 300px;
}

.footer-links h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Internal Pages Custom Layouts */
.page-header {
  padding: 4rem 0;
  text-align: center;
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.page-header p {
  color: var(--text-muted);
  font-size: 1.125rem;
}

.filter-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  gap: 1rem;
}

.filter-search {
  flex: 1;
  max-width: 400px;
  padding: 0.75rem 1rem;
  border-radius: calc(var(--radius) / 2);
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-main);
  outline: none;
}

.filter-select {
  padding: 0.75rem 1rem;
  border-radius: calc(var(--radius) / 2);
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-main);
  outline: none;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: calc(var(--radius) / 2);
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  color: var(--text-main);
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.about-stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-top: 3rem;
  margin-bottom: 3rem;
}

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

.stat-no {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

/* Blog Page */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.blog-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.blog-img {
  width: 100%;
  height: 200px;
  background: #E5E7EB;
  object-fit: cover;
}

.blog-content {
  padding: 1.5rem;
}

.blog-meta {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.blog-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.blog-read {
  color: var(--primary-color);
  font-weight: 500;
}

/* Responsive */
@media (max-width: 1024px) {
  .category-grid, .tool-grid, .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero h1 {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links, .theme-toggle {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--card-bg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.active .theme-toggle {
    display: block;
  }
  
  .category-grid, .tool-grid, .blog-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .search-btn {
    padding: 0.75rem 1.5rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-stats {
    flex-direction: column;
    gap: 2rem;
  }
  
  .contact-layout {
    grid-template-columns: 1fr;
  }
}