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

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

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 1rem;
}

header {
  padding: 1rem 0;
  border-bottom: 1px solid #ddd;
  margin-bottom: 1rem;
}

header h1 {
  font-size: 1.5rem;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.article-card {
  background: white;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.article-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.article-card h3 a {
  color: #333;
  text-decoration: none;
}

.article-card h3 a:hover {
  color: #0066cc;
}

.article-card .summary {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.article-card .meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: #888;
  margin-bottom: 0.5rem;
}

.article-card .tags {
  display: flex;
  gap: 0.25rem;
}

.article-card .tag {
  background: #eee;
  padding: 0.125rem 0.5rem;
  border-radius: 4px;
}

.article-card .actions {
  display: flex;
  gap: 0.5rem;
}

.article-card .actions button {
  padding: 0.5rem 1rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: white;
  cursor: pointer;
}

.article-card .actions button:hover {
  background: #f0f0f0;
}

/* Settings */
.setting-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: white;
  padding: 1.25rem;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.2s, transform 0.2s;
}

.setting-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  transform: translateY(-2px);
}

.setting-icon {
  font-size: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f0f0f0;
  border-radius: 50%;
  flex-shrink: 0;
}

.setting-content {
  flex: 1;
}

.setting-content h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.setting-content p {
  font-size: 0.85rem;
  color: #666;
}

.setting-arrow {
  color: #999;
  font-size: 1.5rem;
}

/* Login */
.login-container {
  max-width: 400px;
  margin: 4rem auto;
  padding: 2rem;
  background: white;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-header h1 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.login-header p {
  color: #666;
  font-size: 0.9rem;
}

.login-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.login-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.875rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  color: white;
  font-weight: 500;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.login-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.login-button:active {
  transform: translateY(0);
}

.login-icon {
  font-size: 1.25rem;
}

.error-message {
  padding: 0.875rem;
  background: #fee;
  color: #c33;
  border-radius: 8px;
  margin-bottom: 1rem;
  text-align: center;
  font-size: 0.9rem;
}