/* --- Modern Japanese Retro Theme --- */

:root {
    --primary-color: #5A8D8D; /* Deep Teal */
    --accent-color: #D65A5A;  /* Muted Red */
    --bg-light: #F8F8F8;     /* Off-white background */
    --text-dark: #333333;
    --text-light: #666666;
    --border-color: #E0E0E0;
    --shadow-light: rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.header {
    background: var(--primary-color);
    color: var(--bg-light);
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: none;
    box-shadow: 0 2px 4px var(--shadow-light);
}

.header h1 {
    font-family: 'Zen Old Mincho', serif;
    font-size: 2.8em;
    color: var(--bg-light);
    margin: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.auth-links a {
    margin-left: 20px;
    color: var(--bg-light);
    text-decoration: none;
    font-weight: 300;
    transition: color 0.3s ease;
}

.auth-links a:hover {
    color: var(--accent-color);
}

.container {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px var(--shadow-light);
    border-radius: 8px;
    overflow: hidden; /* For inner elements like category-list and content */
}

.category-list {
    background-color: #FAFAFA;
    border-right: 1px solid var(--border-color);
    padding: 20px;
}

.category-list h3 {
    font-family: 'Zen Old Mincho', serif;
    font-size: 1.8rem;
    color: var(--primary-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.category-list .nav-link {
    color: var(--text-dark);
    padding: 8px 0;
    font-size: 1rem;
    text-decoration: none;
    transition: color 0.3s ease, transform 0.2s ease;
}

.category-list .nav-link:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.content {
    padding: 25px;
}

.content h2 {
    font-family: 'Zen Old Mincho', serif;
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 25px;
}

.link-item {
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    padding: 15px;
    border-radius: 6px;
    background-color: #FFFFFF;
    transition: box-shadow 0.3s ease, transform 0.2s ease;
}

.link-item:hover {
    box-shadow: 0 8px 20px var(--shadow-light);
    transform: translateY(-3px);
}

.link-item .thumbnail {
    width: 150px; /* Slightly larger thumbnail */
    height: 100px;
    object-fit: cover;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-right: 20px;
    float: left;
}

.link-item-body {
    overflow: hidden;
}

.link-item-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.link-item-title a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.link-item-title a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.link-item-url {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 8px;
    display: block;
}

.link-item-description {
    font-size: 1rem;
    color: var(--text-dark);
}

.footer {
    text-align: center;
    padding: 25px 0;
    background-color: var(--primary-color);
    color: var(--bg-light);
    font-size: 0.9rem;
    margin-top: 40px;
    box-shadow: 0 -2px 4px var(--shadow-light);
}