.art-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.art-hero {
    padding: 34px 0 20px;
}

.art-hero-title {
    margin: 10px 0 14px;
    font-size: clamp(30px, 5vw, 52px);
    line-height: 1.08;
    letter-spacing: -0.03em;
    max-width: 900px;
}

.art-hero-excerpt {
    max-width: 820px;
    font-size: 18px;
    line-height: 1.8;
    color: var(--muted);
    margin: 0 0 18px;
}

.art-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    align-items: center;
    font-size: 13px;
    color: var(--muted);
    padding-top: 10px;
    border-top: 1px solid var(--rule);
}

    .art-hero-meta span {
        position: relative;
    }

        .art-hero-meta span:not(:first-child)::before {
            content: "•";
            margin-right: 10px;
            color: var(--rule);
        }

.art-cover {
    margin-top: 8px;
    margin-bottom: 30px;
}

    .art-cover img {
        width: 100%;
        display: block;
        border-radius: 18px;
        box-shadow: 0 18px 50px rgba(0,0,0,.08);
    }

.art-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 34px;
    align-items: start;
}

.art-body {
    min-width: 0;
}

.art-content-wrap {
    background: var(--card, #fff);
    border: 1px solid var(--rule);
    border-radius: 18px;
    padding: 28px;
    box-shadow: 0 10px 30px rgba(0,0,0,.03);
}

    .art-content-wrap > *:first-child {
        margin-top: 0;
    }

    .art-content-wrap > *:last-child {
        margin-bottom: 0;
    }

.art-tags {
    margin-top: 26px;
    padding: 18px 0 0;
    border-top: 1px solid var(--rule);
}

.art-tags-label {
    display: inline-block;
    margin-bottom: 10px;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--muted);
}

.art-tags-items {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.art-actions {
    margin-top: 26px;
    padding: 20px;
    border: 1px solid var(--rule);
    border-radius: 16px;
    background: var(--card, #fff);
}

.art-actions-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
}

.art-actions-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn-sm {
    font-size: 12px;
    padding: 10px 14px;
}

.art-sidebar {
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: sticky;
    top: 90px;
}

.sb-box {
    border: 1px solid var(--rule);
    border-radius: 18px;
    overflow: hidden;
    background: var(--card, #fff);
    box-shadow: 0 8px 25px rgba(0,0,0,.03);
}

.sb-box-title {
    padding: 14px 16px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .04em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--rule);
    background: #fafafa;
}

.sb-box-body {
    padding: 16px;
}

.sb-list-body {
    padding: 6px 16px;
}

.sb-link-item {
    display: block;
    padding: 12px 0;
    text-decoration: none;
    color: var(--ink);
    border-bottom: 1px solid var(--rule);
}

    .sb-link-item:last-child {
        border-bottom: 0;
    }

.sb-link-title {
    display: block;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.45;
}

.sb-link-meta {
    display: block;
    margin-top: 4px;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    color: var(--muted);
}

.sb-cta-body {
    font-size: 14px;
    line-height: 1.7;
}

.sb-cta-text {
    margin: 0 0 14px;
    color: var(--muted);
}

.sb-full-btn {
    width: 100%;
    display: block;
    text-align: center;
}

.sb-box-gold {
    border-left: 4px solid var(--gold);
}

.sb-box-title-gold {
    background: var(--gold);
    color: #000;
}

.sb-gold-btn {
    background: var(--gold);
    color: #000;
}

.sb-box-accent {
    border-left: 4px solid var(--accent);
}

.sb-box-title-accent {
    background: var(--accent);
    color: #fff;
}

.not-found-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.not-found-title {
    font-family: 'Playfair Display', serif;
    margin: 0 0 8px;
}

.not-found-text {
    color: var(--muted);
    margin: 8px 0 24px;
}

@media (max-width: 991px) {
    .art-layout {
        grid-template-columns: 1fr;
    }

    .art-sidebar {
        position: static;
        top: auto;
    }

    .art-content-wrap {
        padding: 22px;
    }
}

@media (max-width: 640px) {
    .art-shell {
        width: min(100% - 20px, 1180px);
    }

    .art-hero {
        padding: 24px 0 14px;
    }

    .art-hero-excerpt {
        font-size: 16px;
    }

    .art-content-wrap,
    .art-actions,
    .sb-box-body {
        padding: 16px;
    }
}