body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: white;
    overflow: hidden;
}

.container {
    text-align: center;
}

/* くるくる回る工事中アイコン */
.loader {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

h1 {
    font-size: 3rem;
    margin: 0;
    letter-spacing: 2px;
}

.status {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-bottom: 30px;
}