:root {
  --primary-color: #2563eb;
  --text-color: #1f2937;
  --bg-color: #ffffff;
  --card-bg: #f3f4f6;
  --border-color: #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #3b82f6;
    --text-color: #f3f4f6;
    --bg-color: #111827;
    --card-bg: #1f2937;
    --border-color: #374151;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.5;
  color: var(--text-color);
  background-color: var(--bg-color);
}

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

.card {
  background-color: var(--card-bg);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
}

.card h2 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.card p {
  margin-bottom: 0.5rem;
}

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

.card a:hover {
  text-decoration: underline;
}

.card time {
  color: #6b7280;
  font-size: 0.875rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  background-color: var(--bg-color);
  color: var(--text-color);
}

button {
  background-color: var(--primary-color);
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.25rem;
  cursor: pointer;
  font-size: 1rem;
}

button:hover {
  opacity: 0.9;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
}

.pagination button {
  min-width: 2.5rem;
}

.error {
  color: #dc2626;
  margin-bottom: 1rem;
}

.success {
  color: #059669;
  margin-bottom: 1rem;
}

@media (max-width: 640px) {
  .container {
    padding: 1rem;
  }
  
  .card {
    padding: 1rem;
  }
}