body { font-family: 'Segoe UI', Tahoma, sans-serif; background: #f4f7f6; color: #333; margin: 0; padding: 20px; }
.container { max-width: 900px; margin: auto; background: #fff; padding: 30px; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
h2 { color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; }
input, button { width: 100%; padding: 12px; margin: 10px 0; border: 1px solid #ddd; border-radius: 4px; box-sizing: border-box; }
button { background: #3498db; color: white; border: none; cursor: pointer; font-weight: bold; }
button:hover { background: #2980b9; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #ddd; }
th { background: #f8f9fa; }