body {
    background: linear-gradient(135deg, #1794ac 0%, #3dd6ea 100%);
    min-height: 100vh;
    font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
}
.main-container {
    padding: 2rem 0;
}
.registration-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.1);
    overflow: hidden;
}
.card-header {
    background: linear-gradient(135deg, #1794ac 0%, #3dd6ea 100%);
    color: white;
    padding: 2rem;
    text-align: center;
    border: none;
}
.card-header img{
    max-height: 60px; 
    margin-bottom: 15px;
}
.step-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 2rem 0;
}
.step {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #e9ecef;
    color: #6c757d;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin: 0 10px;
    position: relative;
}
.step.active {
    background: #667eea;
    color: white;
}
.step.completed {
    background: #28a745;
    color: white;
}
.step-connector {
    width: 50px;
    height: 2px;
    background: #e9ecef;
}
.step-connector.completed {
    background: #28a745;
}
.form-section {
    display: none;
    padding: 2rem;
}
.form-section.active {
    display: block;
}
.plan-card {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
}
.plan-card:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.plan-card.selected {
    border-color: #667eea;
    background: #f8f9ff;
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.2);
}
.plan-card.selected::after {
    content: '✓';
    position: absolute;
    top: 10px;
    right: 15px;
    background: #28a745;
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
}
.plan-price {
    font-size: 2rem;
    font-weight: bold;
    color: #667eea;
    margin: 1rem 0;
}
.btn-primary {
    background: linear-gradient(135deg, #1794ac 0%, #3dd6ea 100%);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    font-weight: 500;
}
.btn-outline-primary {
    border-color: #667eea;
    color: #667eea;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    font-weight: 500;
}
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #e9ecef;
    padding: 0.75rem;
}
.form-control:focus, .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}
.navigation-buttons {
    display: flex;
    justify-content: space-between;
    padding: 2rem;
    background: #f8f9fa;
}
.address-search {
    display: flex;
    gap: 10px;
    align-items: end;
}
.confirmation-item {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}
.confirmation-label {
    font-weight: bold;
    color: #495057;
    margin-bottom: 0.5rem;
}
.confirmation-value {
    color: #212529;
}
.success-card {
    text-align: center;
    padding: 3rem;
}
.success-icon {
    font-size: 4rem;
    color: #28a745;
    margin-bottom: 1rem;
}

/* フィードバック要素のスタイル */
.feedback-message {
    font-size: 0.875rem;
    margin-top: 0.25rem;
}
.feedback-message.valid-feedback {
    color: #28a745;
}
.feedback-message.invalid-feedback {
    color: #dc3545;
}
.plan-price .text-muted.small{
    font-size: 12px;
}
@media screen and (max-width: 300px){
    /* .row>*{
        padding-right:0;
    } */
    .plan-price{
        font-size: 1.5rem;
    }

}