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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell,
    sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f5f5f5;
}

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

header {
  background: #07131f;
  color: white;
  padding: 0.5rem 0;
  margin-bottom: 2rem;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 100%;
}

header h1 {
  font-size: 1.5rem;
  color: white;
  margin-bottom: 0;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 1.5rem;
}

nav a:hover {
  text-decoration: underline;
}

main {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: #3498db;
  color: white;
  text-decoration: none;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
}

.btn:hover {
  background: #2980b9;
}

.btn-secondary {
  background: #95a5a6;
}

.btn-secondary:hover {
  background: #7f8c8d;
}

.btn-danger {
  background: #e74c3c;
}

.btn-danger:hover {
  background: #c0392b;
}

.google-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: white;
  color: #333;
  border: 1px solid #ddd;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  border-radius: 4px;
  font-size: 1rem;
  transition: background 0.3s;
}

.google-btn:hover {
  background: #f5f5f5;
}

/* Typography */
h1 {
  margin-bottom: 2rem;
  color: #2c3e50;
}

h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: #2c3e50;
  font-size: 1.5rem;
}

/* Utility Classes */
.no-data {
  color: #7f8c8d;
  font-style: italic;
  padding: 2rem;
  text-align: center;
  background: #f8f9fa;
  border-radius: 8px;
}

.back-link {
  display: inline-block;
  color: #3498db;
  text-decoration: none;
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.back-link:hover {
  text-decoration: underline;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .container {
    padding: 0 12px;
  }

  main {
    padding: 1rem;
    margin-bottom: 1rem;
  }

  header {
    margin-bottom: 1rem;
  }

  header h1 {
    font-size: 1.25rem;
  }

  nav a {
    margin-left: 1rem;
    font-size: 0.9rem;
  }

  h1 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
  }

  h2 {
    font-size: 1.25rem;
    margin-top: 1rem;
  }
}