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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.card {
    background: white;
    max-width: 800px;
    margin: 0 auto;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

h1 {
    color: #333;
    margin-bottom: 20px;
    text-align: center;
    border-bottom: 2px solid #667eea;
    padding-bottom: 10px;
}

h2 {
    color: #555;
    margin: 25px 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid #eee;
}

form {
    margin: 20px 0;
}

label {
    display: block;
    margin: 15px 0 5px 0;
    font-weight: 600;
    color: #555;
}

input, select, textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #667eea;
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 15px;
    transition: transform 0.2s;
}

button:hover {
    transform: translateY(-2px);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
}

tr:hover {
    background-color: #f8f9fa;
}

a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

a:hover {
    text-decoration: underline;
}

.error {
    background: #ffebee;
    color: #c62828;
    padding: 12px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 4px solid #c62828;
}

.success {
    background: #e8f5e8;
    color: #2e7d32;
    padding: 12px;
    border-radius: 8px;
    margin: 15px 0;
    border-left: 4px solid #2e7d32;
}

ul {
    list-style: none;
    margin: 10px 0;
}

li {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

p {
    margin: 10px 0;
    line-height: 1.6;
}

strong {
    color: #333;
}

/* Responsive */
@media (max-width: 768px) {
    .card {
        padding: 20px;
        margin: 10px;
    }
    
    table {
        font-size: 14px;
    }
    
    th, td {
        padding: 8px 10px;
    }
}