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

:root {
  /* Light Theme Colors */
  --bg-color: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --header-bg: rgba(255, 255, 255, 0.8);
  --footer-bg: #1e293b;
  --footer-text: #cbd5e1;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 0.75rem;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  /* Dark Theme Colors */
  --bg-color: #0f172a;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-color: #60a5fa;
  --accent-hover: #3b82f6;
  --card-bg: #1e293b;
  --border-color: #334155;
  --header-bg: rgba(15, 23, 42, 0.8);
  --footer-bg: #0b1120;
  --footer-text: #94a3b8;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  color: var(--accent-color);
}

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

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

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

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: var(--border-color);
}

.moon-icon, .sun-icon {
  display: none;
}

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

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

/* Main Content */
.main {
  flex: 1;
  padding: 3rem 0;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 0;
  margin-bottom: 3rem;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(37, 99, 235, 0.05) 100%);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Grid Layout for Posts */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

/* Card Style */
.card {
  background-color: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.card-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-tag {
  display: inline-block;
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--accent-color);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  width: fit-content;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

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

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

.card-excerpt {
  font-size: 0.875rem;
  margin-bottom: 1rem;
  flex: 1;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

/* Page Standard Layout (Privacy, Terms, About) */
.page-header {
  margin-bottom: 2rem;
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
}

.content-box {
  background-color: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  max-width: 800px;
  margin: 0 auto;
}

.content-box h2 {
  margin-top: 2rem;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
}

.form-control {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: inherit;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.btn:hover {
  background-color: var(--accent-hover);
  color: white;
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
  padding: 3rem 0 1.5rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-widget h3 {
  color: white;
  margin-bottom: 1.25rem;
  font-size: 1.125rem;
}

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

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

.footer-links a:hover {
  color: var(--accent-color);
  padding-left: 0.25rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
}

/* Ad Placement Placeholders */
.ad-slot, .ad-container {
  display: none !important;
}

/* Original placeholders kept for reference
.ad-slot {
  background-color: var(--border-color);
  border: 1px dashed var(--text-secondary);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 2rem 0;
  text-align: center;
  padding: 1rem;
}
*/

.ad-horizontal {
  width: 100%;
  height: 90px;
}

.ad-sidebar {
  width: 100%;
  height: 250px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 4rem;
    left: 0;
    right: 0;
    background-color: var(--card-bg);
    flex-direction: column;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero h1 {
    font-size: 2rem;
  }
}