body { font-family: Arial, sans-serif; line-height: 1.6; margin: 0; padding: 0; background: #f4f4f4; }
.container { width: 80%; margin: auto; overflow: hidden; padding: 20px; background: #fff; margin-top: 30px; border-radius: 5px; box-shadow: 0 0 10px rgba(0,0,0,0.1); }
header { background: #333; color: #fff; padding: 20px 0; text-align: center; }
header h1 { margin: 0; }
.nav-bar { background: #444; color: #fff; padding: 10px; text-align: right; }
.nav-bar a { color: #fff; text-decoration: none; margin-left: 15px; }
.form-group { margin-bottom: 15px; }
.form-group label { display: block; margin-bottom: 5px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 8px; box-sizing: border-box; }
.btn { background: #5cb85c; color: #fff; padding: 10px 15px; border: none; cursor: pointer; }
.btn-danger { background: #d9534f; }
.btn-primary { background: #0275d8; }
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: #f2f2f2; }
.alert { padding: 15px; margin-bottom: 20px; border: 1px solid transparent; border-radius: 4px; }
.alert-success { color: #3c763d; background-color: #dff0d8; border-color: #d6e9c6; }
.alert-danger { color: #a94442; background-color: #f2dede; border-color: #ebccd1; }
.abstract-section { margin-bottom: 20px; padding: 15px; border: 1px solid #eee; border-radius: 5px; }
.abstract-section h3 { margin-top: 0; border-bottom: 2px solid #eee; padding-bottom: 5px; }