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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
}

nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

nav a {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

nav a:hover {
    background-color: #45a049;
}

.vulnerability-list {
    display: grid;
    gap: 20px;
}

.vuln-card {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border-left: 5px solid #ff6b6b;
}

.vuln-card h3 {
    color: #ff6b6b;
    margin-bottom: 15px;
}

code {
    background-color: #f8f9fa;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: #d63384;
    margin: 5px 0;
    display: inline-block;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    margin-top: 10px;
}

.btn:hover {
    background-color: #0056b3;
}

.btn-back {
    display: inline-block;
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #6c757d;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}

.warning {
    background-color: #fff3cd;
    border: 1px solid #ffeaa7;
    padding: 20px;
    border-radius: 10px;
    margin-top: 30px;
}

.warning h3 {
    color: #856404;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input,
.form-group textarea,
input[type="text"],
input[type="password"],
input[type="file"],
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.hint {
    background-color: #e7f3ff;
    padding: 15px;
    border-radius: 5px;
    margin: 20px 0;
}

.hint ul {
    margin-left: 20px;
}

.vuln-section {
    background: white;
    padding: 20px;
    margin: 20px 0;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.comment, .upload-item, .post {
    background: white;
    padding: 15px;
    margin: 10px 0;
    border-radius: 5px;
    border-left: 3px solid #4CAF50;
}

.alert {
    background-color: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

footer {
    text-align: center;
    margin-top: 50px;
    padding: 20px;
    color: #666;
    border-top: 1px solid #ddd;
}