/* HTML作品一覧と表示用シェルのスタイル。作品本体はiframe内で分離する。 */
.works-index {
    max-width: 800px;
    margin: 4rem auto 1rem;
}

.works-index__header {
    margin-bottom: 1.5rem;
}

.works-index__header h1,
.works-index__header h2 {
    margin-bottom: .5rem;
}

.works-index__header h1 a,
.works-index__header h2 a {
    color: inherit;
    text-decoration: none;
}

.works-index__header p,
.works-card p {
    color: var(--content, #4a4a4a);
}

.works-grid {
    display: grid;
    gap: 1rem;
}

.works-card {
    position: relative;
    padding: 1.25rem 1.4rem;
    border: 1px solid var(--border, #e5e5e5);
    border-radius: 12px;
    background: var(--entry, #fff);
    color: var(--primary, #222);
}

.works-card h3 {
    margin: 0 0 .5rem;
    font-size: 1.15rem;
}

.works-card h3 a {
    color: inherit;
    text-decoration: none;
}

.works-card p {
    margin: 0 0 .8rem;
}

.works-card__link {
    font-size: .95rem;
    color: inherit;
    font-weight: 600;
}

.works-card h3 a:hover,
.works-card__link:hover,
.works-index__header h1 a:hover,
.works-index__header h2 a:hover {
    color: #6ea8e5;
}

.works-empty {
    color: var(--secondary, #666);
}

.works-shell {
    --shell-bg: #f7f7f7;
    --shell-surface: #fff;
    --shell-text: #222;
    --shell-muted: #666;
    --shell-border: #ddd;
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background: var(--shell-bg);
    color: var(--shell-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.works-shell__header {
    position: sticky;
    top: 0;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .85rem max(1rem, calc((100vw - 1100px) / 2));
    border-bottom: 1px solid var(--shell-border);
    background: color-mix(in srgb, var(--shell-bg) 92%, transparent);
    backdrop-filter: blur(10px);
}

.works-shell__header a {
    color: inherit;
    text-decoration: none;
}

.works-shell__brand {
    font-weight: 700;
}

.works-shell__header nav {
    display: flex;
    gap: 1rem;
    color: var(--shell-muted);
    font-size: .95rem;
}

.works-shell__main {
    width: min(100% - 2rem, 1100px);
    margin: 0 auto;
}

.works-shell .works-index {
    margin-top: 3rem;
}

.works-shell .works-card {
    background: var(--shell-surface);
}

.works-viewer {
    padding: 1.5rem 0 2rem;
}

.works-viewer__topline {
    margin-bottom: 1rem;
}

.works-back-link {
    display: inline-flex;
    align-items: center;
    padding: .45rem .8rem;
    border: 1px solid var(--shell-border);
    border-radius: 999px;
    color: var(--shell-muted);
    background: var(--shell-surface);
    font-size: .9rem;
    text-decoration: none;
    transition: border-color .2s ease, color .2s ease, transform .2s ease;
}

.works-back-link:hover {
    border-color: currentColor;
    color: var(--shell-text);
    transform: translateX(-2px);
}

.works-viewer__title {
    margin: 0 0 1rem;
    font-size: clamp(1.4rem, 3vw, 2rem);
}

.works-viewer__frame {
    display: block;
    width: 100%;
    min-height: 70vh;
    height: calc(100vh - 150px);
    border: 1px solid var(--shell-border);
    border-radius: 10px;
    background: #fff;
}

@media (max-width: 600px) {
    .works-shell__header {
        align-items: flex-start;
        flex-direction: column;
        gap: .5rem;
    }

    .works-shell__header nav {
        gap: .8rem;
    }

    .works-viewer__frame {
        min-height: 75vh;
        height: 75vh;
        border-radius: 6px;
    }
}

@media (prefers-color-scheme: dark) {
    .works-index__header p,
    .works-card p {
        color: #d0d0d3;
    }

    .works-shell {
        --shell-bg: #1d1e20;
        --shell-surface: #2e2e33;
        --shell-text: #eee;
        --shell-muted: #aaa;
        --shell-border: #444;
    }
}