.pennie-product .product-split {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.7fr);
    align-items: center;
    gap: clamp(24px, 6vw, 80px);
}
.pennie-product .product-screen { margin: 0 auto; max-width: 310px; width: 100%; }
.pennie-product .product-screen img { display: block; width: 100%; height: auto; border-radius: 20px; border: 1px solid #526078; box-shadow: 0 16px 42px #0003; }
.pennie-product .product-screen figcaption { margin-top: 14px; font-size: .8rem; line-height: 1.6; color: var(--text-muted); }
.pennie-product .product-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); gap: 20px; margin: 28px 0; }
.pennie-product .panel { overflow-wrap: anywhere; }
.pennie-product .product-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; padding-left: 24px; margin: 32px 0; }
.pennie-product .product-steps li { padding-left: 5px; }
.pennie-product .product-split li { margin-bottom: 12px; }
.pennie-product section[id], .pennie-product article[id] { scroll-margin-top: 110px; }
.pennie-product a:focus-visible { outline: 3px solid #a7cfff; outline-offset: 4px; }
.pennie-product .guide-symbols { position: absolute; overflow: hidden; pointer-events: none; }
.pennie-product .guide-quicknav { display: flex; flex-direction: column; gap: 24px; }
.pennie-product .guide-quicknav > div { width: 100%; min-width: 0; }
.pennie-product .guide-nav-groups { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; margin-top: 24px; }
.pennie-product .guide-nav-label { display: flex; align-items: center; gap: 10px; margin: 0 0 16px; font-size: .9rem; line-height: 1.5; }
.pennie-product .guide-number { display: inline-grid; place-items: center; width: 30px; height: 30px; flex: 0 0 30px; border-radius: 10px; background: var(--brand-soft); color: var(--brand); font-size: .75rem; }
.pennie-product .guide-nav-groups .toc-list { display: block; }
.pennie-product .guide-nav-groups .toc-list a { min-height: 44px; padding: 8px; gap: 10px; border-radius: 10px; line-height: 1.45; font-size: .9rem; }
.pennie-product .guide-nav-groups .toc-list a:hover,
.pennie-product .guide-nav-groups .toc-list a:focus-visible { background: var(--brand-soft); color: var(--brand); }
.pennie-product .guide-nav-icon,
.pennie-product .guide-section-icon { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.pennie-product .guide-nav-icon { width: 20px; height: 20px; flex: 0 0 20px; color: var(--brand); }
.pennie-product .guide-quicknav .quick-nav-right { min-height: 0; }
.pennie-product .guide-quicknav .icon-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.pennie-product .guide-quicknav .icon-list li { margin: 0; }
.pennie-product .guide-section-heading { display: flex; align-items: flex-start; gap: 24px; justify-content: space-between; margin-bottom: 22px; }
.pennie-product .guide-heading { display: flex; align-items: flex-start; gap: 16px; margin: 0; min-width: 0; text-align: start; }
.pennie-product .guide-heading > span { min-width: 0; overflow-wrap: anywhere; }
.pennie-product .guide-section-icon { width: 46px; height: 46px; flex: 0 0 46px; padding: 10px; border-radius: 14px; background: var(--brand-soft); color: var(--brand); }
.pennie-product .guide-back { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 8px 12px; flex: 0 0 auto; font-size: .8rem; color: var(--text-muted); border: 1px solid var(--border); border-radius: 999px; }
.pennie-product .guide-back:hover { color: var(--brand); background: var(--bg-alt); }
.pennie-product .guide-chapter { display: flex; align-items: center; gap: 10px; margin: 0 0 20px; color: var(--brand); font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.pennie-product .guide-chapter > span { padding: 4px 8px; border: 1px solid var(--border); border-radius: 6px; }
@media (max-width: 1100px) {
    .pennie-product .guide-nav-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
    .pennie-product .product-split { grid-template-columns: minmax(0, 1fr); gap: 32px; }
    .pennie-product .product-steps { grid-template-columns: minmax(0, 1fr); }
    .pennie-product .product-screen { max-width: 290px; }
    .pennie-product .guide-nav-groups { display: block; }
    .pennie-product .guide-nav-group + .guide-nav-group { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--border); }
    .pennie-product .guide-quicknav .icon-list { grid-template-columns: minmax(0, 1fr); }
    .pennie-product .guide-section-heading { flex-direction: column; gap: 12px; }
    .pennie-product .guide-heading { font-size: 1.65rem; gap: 12px; }
    .pennie-product .guide-section-icon { width: 38px; height: 38px; flex-basis: 38px; padding: 8px; border-radius: 12px; }
}