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

html {
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', 'Noto Sans JP', sans-serif;
    background-color: #ffffff;
    color: #333333;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.logo {
    height: 100px;
    width: auto;
    object-fit: contain;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #1a1a1a;
    letter-spacing: 0.02em;
}

.date {
    font-size: 0.95rem;
    color: #666666;
    margin-bottom: 2rem;
}

.main-card {
    background-color: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 0.5rem;
    overflow: hidden;
}

.card-content {
    font-size: .99rem;
    padding: 2rem;
}

.card-content p {
    margin-bottom: 1.5rem;
    color: #333333;
    line-height: 1.8;
}

.card-content p:last-of-type {
    margin-bottom: 0;
}

.links-section {
    margin-top: 1.5rem;
}

.link-item {
    margin-bottom: 1rem;
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 1rem;
    font-weight: 400;
    color: #1a1a1a;
    margin-bottom: 0;
    display: block;
}

.link {
    color: #0066cc;
    text-decoration: none;
    word-break: break-all;
    padding: 0;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.link:hover {
    border-bottom-color: #0066cc;
}

.link:focus {
    outline: 2px solid #0066cc;
    outline-offset: 2px;
}

@media (max-width: 768px) {
    .container {
        padding: 2rem 1rem;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .logo {
        height: 80px;
    }

    .card-content {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1.5rem 0.75rem;
    }

    .header h1 {
        font-size: 1.25rem;
    }

    .logo {
        height: 70px;
    }

    .card-content {
        padding: 1rem;
    }

    .card-content p {
        margin-bottom: 1rem;
    }

    .link-title {
        font-size: 0.95rem;
    }

    .link {
        font-size: 0.9rem;
    }
}