/* EndlessTech Blog - Main Stylesheet */

/* ==================== CSS Variables ==================== */
:root {
  /* Brand Colors */
  --color-primary: #3366FF;
  --color-secondary: #FFB84D;
  --color-accent: #FFB84D;
  --color-neon-cyan: #00D9FF;
  --color-neon-pink: #FF00FF;
  
  /* Neutral Colors */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F5F5;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #E0E0E0;
  
  /* Typography */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-code: 'Fira Code', 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Layout */
  --max-width: 1200px;
  --max-width-content: 800px;
  --header-height: 80px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  
  /* Border Radius */
  --border-radius: 8px;
  
  /* Transitions */
  --transition: all 0.3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==================== Typography ==================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-xl);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-lg);
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--color-accent);
}

strong, b {
  font-weight: 700;
}

em, i {
  font-style: italic;
}

/* ==================== Header & Navigation ==================== */
.header {
  background-color: var(--color-bg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo img {
  height: 50px;
  width: auto;
}

.nav {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav a {
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
}

.nav a:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
}

.nav a.active {
  color: var(--color-primary);
  font-weight: 700;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  .nav {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-bg);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    transition: left 0.3s ease;
    box-shadow: var(--shadow-lg);
  }
  
  .nav.active {
    left: 0;
  }
}

/* ==================== Hero Section ==================== */
.hero {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(51, 102, 255, 0.8), rgba(255, 184, 77, 0.6));
  z-index: -1;
}

.hero-content {
  max-width: var(--max-width-content);
  padding: 0 var(--spacing-md);
  z-index: 1;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-cta {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-accent);
  color: white;
  font-weight: 700;
  border-radius: 8px;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

.hero-cta:hover {
  background-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
  .hero {
    height: 400px;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
}

/* ==================== Main Content ==================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.content {
  max-width: var(--max-width-content);
  margin: 0 auto;
}

/* ==================== Blog Posts Grid ==================== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.post-card {
  background-color: var(--color-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

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

.post-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.post-card-content {
  padding: var(--spacing-md);
}

.post-card-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.post-card-title a {
  color: var(--color-text);
}

.post-card-title a:hover {
  color: var(--color-primary);
}

.post-card-meta {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-sm);
}

.post-card-excerpt {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.post-card-link {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 600;
  transition: var(--transition);
}

.post-card-link:hover {
  color: var(--color-accent);
}

/* ==================== Single Post ==================== */
.post-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.post-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.post-meta {
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.post-image {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: var(--spacing-xl);
}

.post-content {
  font-size: 1.125rem;
  line-height: 1.8;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: var(--spacing-lg) 0;
}

.post-content ul, .post-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.post-content li {
  margin-bottom: var(--spacing-xs);
}

.post-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--color-text-light);
}

.post-content code {
  font-family: var(--font-code);
  background-color: var(--color-bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-content pre {
  background-color: var(--color-bg-alt);
  padding: var(--spacing-md);
  border-radius: 8px;
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

.post-content pre code {
  background-color: transparent;
  padding: 0;
}

/* ==================== Author Bio ==================== */
.author-bio {
  background-color: var(--color-bg-alt);
  padding: var(--spacing-lg);
  border-radius: 12px;
  margin-top: var(--spacing-xxl);
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
}

.author-info h3 {
  margin-bottom: var(--spacing-xs);
}

.author-info p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ==================== Footer ==================== */
.footer {
  background-color: var(--color-text);
  color: white;
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xxl);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer p {
  margin-bottom: var(--spacing-sm);
}

.footer a {
  color: var(--color-accent);
}

.footer a:hover {
  color: var(--color-neon-cyan);
}

/* ==================== Utility Classes ==================== */
.text-center {
  text-align: center;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* ==================== Responsive Design ==================== */
@media (max-width: 1024px) {
  :root {
    --spacing-xl: 2.5rem;
    --spacing-xxl: 3rem;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 2.5rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .posts-grid {
    grid-template-columns: 1fr;
  }
  
  .author-bio {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: var(--spacing-md) var(--spacing-sm);
  }
}