body { font-family: Arial, sans-serif; margin: 0; padding: 20px; background: #f8f9fa; }
.container { max-width: 1200px; margin: 0 auto; }
header { background: #2c3e50; color: white; padding: 15px; text-align: center; }
nav a { color: white; margin: 0 15px; text-decoration: none; }
table { width: 100%; border-collapse: collapse; margin: 20px 0; }
th, td { border: 1px solid #ddd; padding: 10px; text-align: left; }
th { background: #34495e; color: white; }
.btn { background: #27ae60; color: white; padding: 8px 16px; text-decoration: none; border-radius: 4px; }
.error { color: #c0392b; }
.success { color: #27ae60; }
.login-container { max-width: 400px; margin: 100px auto; padding: 30px; background: white; border-radius: 8px; box-shadow: 0 0 15px rgba(0,0,0,0.1); }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; }
input, button { width: 100%; padding: 10px; margin-bottom: 10px; box-sizing: border-box; }
button { background: #27ae60; color: white; border: none; cursor: pointer; }
.stats div { background: #ecf0f1; padding: 15px; margin: 10px 0; border-radius: 6px; }