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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    max-width: 1200px;
    width: 100%;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.header {
    background: #2c3e50;
    color: white;
    padding: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2.2em;
    margin-bottom: 10px;
}

.header p {
    font-size: 1.1em;
    opacity: 0.9;
}

.content {
    padding: 40px;
}

.role-buttons {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    font-size: 1.2em;
    font-weight: bold;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    background: #3498db;
    color: white;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
    background: #2980b9;
}

.btn-admin {
    background: #e74c3c;
}

.btn-admin:hover {
    background: #c0392b;
}

.btn-user {
    background: #2ecc71;
}

.btn-user:hover {
    background: #27ae60;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #2c3e50;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
    transition: border 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 2px rgba(52,152,219,0.2);
}

.error-message {
    color: #e74c3c;
    margin-top: 15px;
    text-align: center;
    font-weight: bold;
    padding: 10px;
    background: #fdecea;
    border-radius: 8px;
    display: none;
}

.info-block {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid #ecf0f1;
    text-align: center;
    color: #7f8c8d;
    font-size: 0.9em;
}

.info-block a {
    color: #3498db;
    text-decoration: none;
}

.info-block a:hover {
    text-decoration: underline;
}

.social-links {
    margin: 15px 0;
}

.social-links a {
    margin: 0 10px;
    color: #2c3e50;
    font-size: 1.2em;
}

.back-link {
    display: inline-block;
    margin-top: 20px;
    color: #3498db;
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

.alert {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

footer {
    background: #ecf0f1;
    text-align: center;
    padding: 20px;
    font-size: 0.8em;
    color: #7f8c8d;
}