/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #3498db;
  --primary-dark: #2980b9;
  --secondary: #9b59b6;
  --dark: #2c3e50;
  --darker: #1a252f;
  --light: #ecf0f1;
  --accent: #e74c3c;
  --success: #2ecc71;
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-alt: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(to bottom, #ffffff 0%, #f8f9fa 100%);
  min-height: 100vh;
}

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

/* Navigation */
.navbar {
  background: var(--gradient);
  color: white;
  padding: 1rem 0;
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

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

.nav-brand a {
  color: white;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: transform 0.3s ease;
}

.nav-brand a:hover {
  transform: scale(1.05);
}

.nav-brand .logo {
  height: 40px;
  width: auto;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
  transition: transform 0.3s ease;
}

.nav-brand a:hover .logo {
  transform: rotate(-10deg);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
  margin: 0;
}

.nav-menu a {
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  position: relative;
  font-weight: 500;
  display: inline-block;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: #667eea;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-menu a:hover {
  background: white;
  color: #667eea;
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.nav-menu a:hover::after {
  width: 80%;
}

.nav-menu .github {
  background: white;
  color: #667eea;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.nav-menu .github::after {
  display: none;
}

.nav-menu .github:hover {
  background: rgba(255,255,255,0.95);
  color: #764ba2;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  text-shadow: none;
}

/* Main Content */
main {
  padding: 3rem 0;
  min-height: calc(100vh - 200px);
}

.content {
  max-width: 1000px;
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  margin: 0 auto 2rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0;
  margin-bottom: 3rem;
}

.hero img {
  max-width: 300px;
  height: auto;
  margin: 0 auto 2rem;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.1));
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  line-height: 1.2;
  color: #2c3e50;
  font-weight: 800;
}

h1 {
  font-size: 2.5rem;
  padding-bottom: 0.5rem;
  position: relative;
}

h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 4px;
  background: var(--gradient);
  border-radius: 2px;
}

h2 {
  font-size: 2rem;
  padding-bottom: 0.5rem;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient);
  border-radius: 2px;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

strong {
  color: var(--dark);
  font-weight: 600;
}

a {
  color: var(--primary);
  text-decoration: none;
  position: relative;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-dark);
}

/* Feature Lists */
ul li strong {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Code */
code {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-family: 'Monaco', 'Menlo', 'Consolas', monospace;
  font-size: 0.9em;
  color: #e83e8c;
  font-weight: 600;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

pre {
  background: #2c3e50;
  color: #ecf0f1;
  padding: 2rem;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-lg);
  position: relative;
  border: 1px solid rgba(102, 126, 234, 0.3);
}

pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient);
  border-radius: 12px 12px 0 0;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: 0.9rem;
  box-shadow: none;
  position: relative;
  z-index: 1;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  box-shadow: var(--shadow-md);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 1rem;
  border: 1px solid #e9ecef;
  text-align: left;
}

th {
  background: var(--gradient);
  color: white;
  font-weight: 600;
}

tr:hover {
  background: linear-gradient(to right, #f8f9fa 0%, #e9ecef 100%);
  transition: background 0.3s ease;
}

/* Lists */
ul, ol {
  margin-left: 2rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

ul li::marker {
  color: var(--primary);
  font-weight: bold;
}

/* Blockquotes */
blockquote {
  border-left: 4px solid var(--primary);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: linear-gradient(to right, #f8f9fa 0%, #ffffff 100%);
  border-radius: 0 8px 8px 0;
  box-shadow: var(--shadow-sm);
  font-style: italic;
  color: #555;
}

/* Horizontal Rule */
hr {
  border: none;
  height: 3px;
  background: var(--gradient);
  margin: 3rem 0;
  border-radius: 2px;
}

/* Footer */
.footer {
  background: var(--gradient);
  color: white;
  padding: 3rem 0;
  margin-top: 4rem;
  text-align: center;
  box-shadow: 0 -4px 6px rgba(0,0,0,0.1);
}

.footer a {
  color: white;
  text-decoration: underline;
  transition: all 0.3s ease;
}

.footer a:hover {
  transform: translateY(-2px);
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.copyright {
  margin-top: 1rem;
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
}

/* Badges & Tags */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--gradient);
  color: white;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  margin: 0.25rem;
}

/* Cards */
.card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
  margin-bottom: 2rem;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar .container {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .content {
    padding: 1.5rem;
  }
  
  .hero {
    padding: 2rem 0;
  }
  
  .hero img {
    max-width: 200px;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main {
  animation: fadeIn 0.6s ease-out;
}