/* Global Styles - Shared across all pages */
:root {
  --primary-color: #4a90e2;
  --text-color: #333;
  --bg-color: #f5f5f5;
  --card-bg: #ffffff;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --hover-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  --border-radius: 12px;
  --transition: all 0.3s ease;
  --category-bg: #e8f4ff;
  --category-text: #2c5aa0;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --primary-color: #64b5f6;
  --text-color: #f0f0f0;
  --bg-color: #0d0d0d;
  --card-bg: #1e1e1e;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  --hover-shadow: 0 4px 16px rgba(0, 0, 0, 0.7);
  --category-bg: #2a5080;
  --category-text: #a5d6ff;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  padding: 20px;
  scroll-behavior: smooth;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header Section */
.header {
  text-align: center;
  margin-bottom: 40px;
  padding: 20px 0;
}

.profile-image {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 20px;
  border: 4px solid var(--primary-color);
}

.header h1 {
  font-size: 2rem;
  margin-bottom: 10px;
  color: var(--text-color);
}

.header p {
  font-size: 1.1rem;
  color: #666;
  max-width: 500px;
  margin: 0 auto;
}

/* Language Switcher */
.language-switcher {
  position: fixed;
  top: 20px;
  right: 140px;
  z-index: 1000;
}

.language-switcher a {
  display: inline-block;
  min-width: 120px;
  padding: 10px 20px;
  background-color: var(--card-bg);
  color: var(--primary-color);
  text-decoration: none;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  font-weight: 600;
  border: 2px solid var(--primary-color);
  text-align: center;
}

.language-switcher a:hover {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--hover-shadow);
  transform: translateY(-2px);
}

/* Dark Mode Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 70px;
  z-index: 1000;
  background-color: var(--card-bg);
  color: var(--text-color);
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius);
  min-width: 60px;
  padding: 10px 15px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  font-size: 1.2rem;
  text-align: center;
}

.theme-toggle:hover {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--hover-shadow);
  transform: translateY(-2px);
}

/* Scroll to Top Button */
.scroll-top {
  position: fixed;
  top: 20px;
  right: 270px;
  z-index: 1000;
  background-color: var(--card-bg);
  color: var(--text-color);
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius);
  min-width: 60px;
  padding: 10px 15px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: var(--transition);
  font-size: 1.2rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.scroll-top:hover {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--hover-shadow);
  transform: translateY(-2px);
}

/* Links Section */
.links {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}

/* Category Navigation */
.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
  padding: 20px;
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

.category-nav a {
  padding: 8px 16px;
  background: var(--category-bg);
  color: var(--category-text);
  text-decoration: none;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  border: 2px solid transparent;
}

.category-nav a:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  transform: scale(1.05);
}

/* Category Section */
.category-section {
  margin-bottom: 50px;
  scroll-margin-top: 80px;
}

.category-section h2 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--primary-color);
}

.link-card {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 20px;
  text-decoration: none;
  color: var(--text-color);
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: block;
  position: relative;
  overflow: hidden;
}

.link-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary-color);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.link-card:hover::before {
  transform: scaleY(1);
}

.link-card:hover {
  box-shadow: var(--hover-shadow);
  transform: translateX(8px);
}

.link-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.link-card p {
  color: #666;
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Dark mode text improvements */
[data-theme="dark"] .link-card p {
  color: #c0c0c0;
}

[data-theme="dark"] .footer {
  color: #999;
}

[data-theme="dark"] .footer a {
  color: var(--primary-color);
}

.link-icon {
  font-size: 1.5rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: 30px 0;
  color: #888;
  font-size: 0.9rem;
  border-top: 1px solid #e0e0e0;
  margin-top: 40px;
}

.footer a {
  color: var(--primary-color);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
  body {
    padding: 15px;
  }

  .header h1 {
    font-size: 1.6rem;
  }

  .header p {
    font-size: 1rem;
  }

  .profile-image {
    width: 100px;
    height: 100px;
  }

  .theme-toggle {
    top: 10px;
    right: 10px;
    padding: 8px 12px;
    min-width: 50px;
  }

  .language-switcher {
    top: 10px;
    right: 70px;
    min-width: 100px;
  }

  .language-switcher a {
    padding: 8px 12px;
    font-size: 0.9rem;
    min-width: 100px;
  }

  .scroll-top {
    top: 60px;
    right: 10px;
    padding: 8px 12px;
    min-width: 50px;
  }

  .category-nav {
    padding: 15px;
  }

  .category-nav a {
    font-size: 0.85rem;
    padding: 6px 12px;
  }

  .category-section h2 {
    font-size: 1.5rem;
  }

  .link-card {
    padding: 16px;
  }

  .link-card h3 {
    font-size: 1.15rem;
  }

  .link-card p {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.4rem;
  }

  .link-card {
    padding: 14px;
  }
}