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

html, body {
    width: 100%;
    height: 100%;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    padding: 20px;
}

.content {
    background: white;
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    max-width: 500px;
    margin: 0 auto;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-section {
    margin-bottom: 30px;
}

.company-logo {
    max-width: 150px;
    height: auto;
    object-fit: contain;
}

.icon {
    font-size: 80px;
    margin-bottom: 30px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

h1 {
    font-size: 42px;
    color: #333;
    margin-bottom: 20px;
    font-weight: 700;
}

p {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.info {
    background: #f0f7ff;
    border-left: 4px solid #667eea;
    padding: 20px;
    margin: 30px 0;
    border-radius: 8px;
}

.info p {
    color: #667eea;
    font-weight: 500;
    margin: 0;
}

.back-link {
    display: inline-block;
    margin-top: 30px;
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 600;
}

.back-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.back-link:active {
    transform: translateY(0);
}

.image-section {
    margin: 30px 0;
}

.construction-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

/* レスポンシブ対応 */
@media (max-width: 600px) {
    .content {
        padding: 40px 20px;
    }

    h1 {
        font-size: 32px;
    }

    .icon {
        font-size: 60px;
    }

    p {
        font-size: 14px;
    }
}