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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f4f4f4;
}

/* Navigation Styles */
.navbar {
  background-color: #2c3e50;
  padding: 1rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo a {
  color: #ecf0f1;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
}

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

.nav-link {
  color: #ecf0f1;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.nav-link:hover {
  background-color: #34495e;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.bar {
  width: 25px;
  height: 3px;
  background-color: #ecf0f1;
  margin: 3px 0;
  transition: 0.3s;
}

/* Main Content */
.main-content {
  margin-top: 80px;
  min-height: calc(100vh - 80px);
}

.section {
  padding: 2rem 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

h1 {
  text-align: center;
  margin-bottom: 2rem;
  color: #2c3e50;
}

/* Ads Grid */
.ads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.ad-card {
  background: white;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.ad-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.ad-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.ad-title {
  font-size: 1.25rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.ad-description {
  color: #666;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.ad-price {
  font-size: 1.1rem;
  font-weight: bold;
  color: #e74c3c;
  margin-bottom: 1rem;
}

.ad-link {
  display: inline-block;
  background-color: #3498db;
  color: white;
  padding: 0.5rem 1rem;
  text-decoration: none;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.ad-link:hover {
  background-color: #2980b9;
}

/* Loading + Status */
.loading-message {
  text-align: center;
  color: #666;
  font-style: italic;
  grid-column: 1 / -1;
  padding: 2rem;
}

.status-message {
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  text-align: center;
  display: none;
}

.status-message.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.status-message.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.status-message.info {
  background-color: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}

/* Button loading state */
.btn-loading {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-loading::after {
  content: " ...";
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0%, 20% { content: " ."; }
  40% { content: " .."; }
  60%, 100% { content: " ..."; }
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: #2c3e50;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0,0,0,0.05);
    padding: 2rem 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active .bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .ads-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .container {
    padding: 0 15px;
  }
}