:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --accent-color: #ff8c00;
    /* Vibrant Orange */
    --accent-hover: #e67e00;
    --font-body: 'Noto Sans JP', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    width: 100%;
    max-width: 480px;
    text-align: center;
    transition: max-width 0.4s ease;
}

.profile {
    margin-bottom: 40px;
}

.profile-img-container {
    width: 180px;
    /* Increased by 20% from 150px */
    height: 180px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--accent-color);
    box-shadow: 0 4px 15px rgba(255, 140, 0, 0.2);
    transition: width 0.4s ease, height 0.4s ease;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

h1 {
    font-size: 1.8rem;
    /* Slightly larger */
    font-weight: 700;
    margin-bottom: 8px;
}

.nickname {
    font-size: 1.2rem;
    color: #666;
    font-weight: 400;
}

.role {
    font-size: 1rem;
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: 12px;
}

.bio {
    font-size: 0.95rem;
    color: #444;
    font-weight: 500;
    margin-top: 15px;
}

.bio p {
    margin-bottom: 4px;
}

.sub-bio {
    font-size: 0.75rem;
    color: #888;
    margin-top: 12px !important;
    font-weight: 400;
}

.links {
    display: grid;
    /* Switched from flex to grid */
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 60px;
}

.link-item {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background-color: #fff;
    border: 2px solid var(--accent-color);
    border-radius: 12px;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
}

.link-item i {
    font-size: 1.2rem;
}

.link-item:hover {
    background-color: var(--accent-color);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 140, 0, 0.3);
}

.link-item.line {
    border-color: #06c755;
    color: #06c755;
}

.link-item.line:hover {
    background-color: #06c755;
    border-color: #06c755;
    color: #fff;
}

.link-item.primary {
    background-color: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.link-item.primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
}

footer {
    font-size: 0.75rem;
    color: #999;
}

/* Desktop Responsiveness */
@media (min-width: 768px) {
    .container {
        max-width: 700px;
    }

    .profile-img-container {
        width: 216px;
        /* Increased by 20% from 180px */
        height: 216px;
    }

    .links {
        grid-template-columns: repeat(2, 1fr);
    }

    .link-item.primary {
        grid-column: span 2;
        /* Full width for the main website link */
    }
}

@media (max-width: 480px) {
    body {
        padding: 40px 16px;
    }
}