:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.register-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0;
}

.register-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    max-width: 500px;
    width: 100%;
}

.register-header {
    background: var(--primary-gradient);
    color: white;
    padding: 40px 30px;
    text-align: center;
}

.register-body {
    padding: 40px 30px;
}

.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    padding: 15px 20px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.btn-register {
    background: var(--primary-gradient);
    border: none;
    border-radius: 10px;
    padding: 15px 30px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.password-strength {
    margin-top: 5px;
    font-size: 12px;
}

.strength-weak { color: #dc3545; }
.strength-medium { color: #ffc107; }
.strength-strong { color: #28a745; }

.login-link {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
}

.login-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.login-link a:hover {
    text-decoration: underline;
}

.alert {
    border-radius: 10px;
    border: none;
}

.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 8px;
}

.input-group-text {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-right: none;
}

.input-group .form-control {
    border-left: none;
}

.input-group:focus-within .input-group-text {
    border-color: #667eea;
}

.back-link {
    position: absolute;
    top: 20px;
    left: 20px;
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.back-link:hover {
    color: #5a6fd8;
}