* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "Noto Sans JP", sans-serif;
    background: #f5f5f5;
    color: #383838;
    line-height: 1.7;
    font-size: 16px;
}
.container {
    max-width: 720px;
    margin: 0 auto;
    background: #fff;
    min-height: 100vh;
}
.site-header {
    background: #fff;
    padding: 12px 20px;
    border-bottom: 3px double #383838;
}
.site-header a {
    color: #383838;
    text-decoration: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.page-title {
    text-align: center;
    padding: 28px 20px 24px;
    font-size: 20px;
    font-weight: 900;
    color: #1980E5;
    border-bottom: 1px solid #e5e7eb;
}
.article-list {
    padding: 0 16px 40px;
}
.article-card {
    display: flex;
    align-items: stretch;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid #eee;
    text-decoration: none;
    color: inherit;
    transition: background 0.15s;
}
.article-card:hover { background: #f8fafc; }
.article-card:last-child { border-bottom: none; }
.card-thumb {
    flex-shrink: 0;
    width: 110px;
    height: 80px;
    border-radius: 6px;
    overflow: hidden;
    background: #e5e7eb;
}
.card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.card-thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #fff;
    font-weight: 900;
}
.thumb-blue { background: #1980E5; }
.thumb-green { background: #047857; }
.thumb-orange { background: #c2410c; }
.thumb-purple { background: #6d28d9; }
.thumb-red { background: #dc2626; }
.thumb-teal { background: #0f766e; }
.thumb-indigo { background: #4338ca; }
.thumb-amber { background: #b45309; }
.thumb-rose { background: #be123c; }
.thumb-slate { background: #475569; }
.card-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.card-title {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.5;
    color: #383838;
    margin-bottom: 6px;
}
.card-date {
    font-size: 12px;
    color: #999;
}
footer {
    text-align: center;
    padding: 20px 20px;
    font-size: 10px;
    line-height: 2;
    background: #333;
    color: #ccc;
}
footer a {
    color: #fff;
    text-decoration: underline;
    margin: 0 8px;
}
.footer-copyright {
    display: block;
    margin-top: 8px;
}

/* Emphasis utilities */
.em-lg { color: #F98033; font-weight: 700; }
.em-md { color: #383838; font-weight: 700; background: linear-gradient(transparent 60%, #FFE160 60%); padding: 0 2px; }
.em-sm { color: #383838; font-weight: 700; }