body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f4f7f6; margin: 0; color: #333; }
.container { width: 90%; max-width: 1200px; margin: 20px auto; background: #fff; padding: 20px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); border-radius: 8px; }
header { background: #2c3e50; color: #fff; padding: 1rem; text-align: center; border-radius: 8px 8px 0 0; }
nav { background: #34495e; padding: 10px; margin-bottom: 20px; border-radius: 4px; }
nav a { color: white; text-decoration: none; margin-right: 15px; font-weight: bold; }
h2 { border-bottom: 2px solid #3498db; padding-bottom: 10px; color: #2c3e50; }
form { display: flex; flex-direction: column; }
label { margin-top: 10px; font-weight: bold; }
input, textarea, select { padding: 10px; margin-top: 5px; border: 1px solid #ddd; border-radius: 4px; }
button, .btn { background: #3498db; color: white; padding: 10px 15px; border: none; border-radius: 4px; cursor: pointer; text-decoration: none; display: inline-block; margin-top: 10px; }
button:hover { background: #2980b9; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; }
table, th, td { border: 1px solid #ddd; }
th, td { padding: 12px; text-align: left; }
th { background-color: #f8f9fa; }
.badge { padding: 5px 10px; border-radius: 20px; font-size: 0.85em; color: white; }
.history-item { border-left: 3px solid #3498db; padding-left: 15px; margin-bottom: 15px; background: #f9f9f9; padding: 10px; }