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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #fff;
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.banner {
    width: 100%;
    margin-bottom: 30px;
}

.banner-img {
    width: 100%;
    aspect-ratio: 1080 / 1350;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.profile {
    text-align: center;
    margin-bottom: 40px;
}

.profile-name {
    font-size: 28px;
    font-weight: 700;
    color: #0F00E0;
    margin-bottom: 8px;
}

.profile-bio {
    font-size: 16px;
    color: #666;
    margin-bottom: 0;
}

.links {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.link-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: #fff;
    border-radius: 12px;
    text-decoration: none;
    color: #333;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    border: 2px solid #e0e0e0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.link-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(15, 0, 224, 0.2);
    border-color: #0F00E0;
    background: #fff;
}

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

.link-title {
    flex: 1;
    text-align: left;
}

.link-arrow {
    font-size: 18px;
    font-weight: 400;
    opacity: 0.7;
    transition: all 0.3s ease;
}

.link-card:hover .link-arrow {
    opacity: 1;
    transform: translateX(4px);
}

.primary-button {
    background: #0F00E0 !important;
    color: white !important;
    border-color: #0F00E0 !important;
}

.primary-button .link-title,
.primary-button .link-arrow {
    color: white;
}

.primary-button:hover {
    background: #0D00C7 !important;
    border-color: #0D00C7 !important;
    box-shadow: 0 8px 24px rgba(15, 0, 224, 0.3);
}

.footer {
    text-align: center;
    margin-top: auto;
}

.footer p {
    color: #666;
    font-size: 14px;
}

/* レスポンシブデザイン */
@media (max-width: 480px) {
    .container {
        padding: 16px;
    }
    
    .profile-name {
        font-size: 24px;
    }
    
    .profile-bio {
        font-size: 14px;
    }
    
    .link-card {
        padding: 14px 20px;
        font-size: 15px;
    }
    
    .links {
        gap: 12px;
    }
}

@media (max-width: 320px) {
    .container {
        padding: 12px;
    }
    
    .profile-name {
        font-size: 20px;
    }
    
    .link-card {
        padding: 12px 16px;
        font-size: 14px;
    }
}

/* PC向けの調整 */
@media (min-width: 768px) {
    .container {
        padding: 40px;
    }
    
    .profile {
        margin-bottom: 50px;
    }
    
    .profile-name {
        font-size: 32px;
    }
    
    .profile-bio {
        font-size: 18px;
    }
    
    .link-card {
        padding: 20px 28px;
        font-size: 17px;
    }
    
    .links {
        gap: 20px;
    }
}