.article-page[data-astro-cid-ktolayic]{padding-bottom:var(--space-3xl)}.article-hero[data-astro-cid-ktolayic]{max-width:58rem;margin-top:var(--space-xl)}.guide-hero-image[data-astro-cid-ktolayic]{margin-top:var(--space-lg);border:1px solid color-mix(in srgb, var(--color-border) 82%, transparent);border-radius:var(--radius-lg);background:var(--ps-surface);box-shadow:var(--ps-raised-md);overflow:hidden}.guide-hero-image[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{aspect-ratio:16/9;object-fit:cover;object-position:center;width:100%;height:auto;display:block}.article-kicker[data-astro-cid-ktolayic]{color:var(--color-accent);font-size:var(--text-sm);letter-spacing:.16em;text-transform:uppercase;font-weight:800}.article-hero[data-astro-cid-ktolayic] h1[data-astro-cid-ktolayic]{margin-top:var(--space-sm);color:var(--color-text);font-family:var(--font-display);font-size:clamp(2.4rem,5vw,4.8rem);font-weight:600;line-height:1.02}.article-intro[data-astro-cid-ktolayic]{margin-top:var(--space-lg);color:var(--color-text-muted);font-size:clamp(1.1rem,2vw,1.35rem);line-height:1.65}.article-meta[data-astro-cid-ktolayic],.article-actions[data-astro-cid-ktolayic]{gap:var(--space-sm);margin-top:var(--space-lg);flex-wrap:wrap;display:flex}.article-meta[data-astro-cid-ktolayic]{color:var(--color-text-subtle);font-size:var(--text-sm);font-weight:700}.article-layout[data-astro-cid-ktolayic]{gap:var(--space-xl);margin-top:var(--space-2xl);grid-template-columns:minmax(0,1fr) minmax(16rem,20rem);align-items:start;display:grid}.article-content[data-astro-cid-ktolayic]{min-width:0}.article-content[data-astro-cid-ktolayic] section[data-astro-cid-ktolayic]+section[data-astro-cid-ktolayic]{margin-top:var(--space-2xl)}.article-content[data-astro-cid-ktolayic] h2[data-astro-cid-ktolayic],.article-sidebar[data-astro-cid-ktolayic] h2[data-astro-cid-ktolayic]{color:var(--color-text);font-family:var(--font-display);font-size:clamp(1.65rem,3vw,2.45rem);font-weight:600;line-height:1.12}.article-sidebar[data-astro-cid-ktolayic] h2[data-astro-cid-ktolayic]{font-size:1.25rem}.article-content[data-astro-cid-ktolayic] p[data-astro-cid-ktolayic],.article-content[data-astro-cid-ktolayic] li[data-astro-cid-ktolayic],.article-sidebar[data-astro-cid-ktolayic] p[data-astro-cid-ktolayic],.article-sidebar[data-astro-cid-ktolayic] li[data-astro-cid-ktolayic]{color:var(--color-text-muted);font-size:1rem;line-height:1.75}.article-content[data-astro-cid-ktolayic] p[data-astro-cid-ktolayic],.article-content[data-astro-cid-ktolayic] ul[data-astro-cid-ktolayic],.article-content[data-astro-cid-ktolayic] ol[data-astro-cid-ktolayic],.article-section-image[data-astro-cid-ktolayic],.sleep-cycle-diagram[data-astro-cid-ktolayic],.table-scroll[data-astro-cid-ktolayic],.formula-card[data-astro-cid-ktolayic]{margin-top:var(--space-md)}.article-content[data-astro-cid-ktolayic] ul[data-astro-cid-ktolayic],.article-content[data-astro-cid-ktolayic] ol[data-astro-cid-ktolayic],.article-sidebar[data-astro-cid-ktolayic] ul[data-astro-cid-ktolayic]{padding-left:1.25rem}.article-content[data-astro-cid-ktolayic] a[data-astro-cid-ktolayic],.article-sidebar[data-astro-cid-ktolayic] a[data-astro-cid-ktolayic]{color:var(--color-accent);text-underline-offset:.18em;font-weight:700;text-decoration:underline}.article-answer[data-astro-cid-ktolayic],.article-cta[data-astro-cid-ktolayic],.article-sidebar-card[data-astro-cid-ktolayic]{padding:var(--space-lg)}.article-feature-card[data-astro-cid-ktolayic]{gap:var(--space-md);margin-top:var(--space-lg);grid-template-columns:minmax(12rem,.72fr) minmax(0,1fr);align-items:stretch;padding:clamp(.75rem,2vw,1rem);display:grid;overflow:hidden}.article-feature-card__media[data-astro-cid-ktolayic]{border-radius:calc(var(--radius-lg) - 4px);background:var(--ps-surface);min-height:100%;box-shadow:var(--ps-inset-sm);display:block;overflow:hidden}.article-feature-card__media[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{aspect-ratio:1.45;object-fit:cover;object-position:center;width:100%;height:100%;min-height:12rem;display:block}.article-feature-card__body[data-astro-cid-ktolayic]{gap:var(--space-xs);align-content:center;min-width:0;padding:clamp(.5rem,2vw,.8rem);display:grid}.article-feature-card__label[data-astro-cid-ktolayic],.article-feature-card__meta[data-astro-cid-ktolayic]{color:var(--color-accent);font-size:var(--text-xs);letter-spacing:.13em;text-transform:uppercase;font-weight:800}.article-feature-card[data-astro-cid-ktolayic] h3[data-astro-cid-ktolayic]{color:var(--color-text);font-family:var(--font-display);font-size:clamp(1.3rem,2.5vw,1.85rem);font-weight:600;line-height:1.08}.article-content[data-astro-cid-ktolayic] .article-feature-card[data-astro-cid-ktolayic] h3[data-astro-cid-ktolayic] a[data-astro-cid-ktolayic]{color:inherit;text-decoration:none}.article-feature-card[data-astro-cid-ktolayic] p[data-astro-cid-ktolayic][itemprop=description]{margin-top:0;font-size:.98rem;line-height:1.55}.article-feature-card__meta[data-astro-cid-ktolayic]{color:var(--color-text-subtle);letter-spacing:.08em;flex-wrap:wrap;gap:.45rem .75rem;display:flex}.article-content[data-astro-cid-ktolayic] .article-feature-card__link[data-astro-cid-ktolayic]{margin-top:var(--space-xs);color:var(--color-accent);font-size:var(--text-sm);justify-self:start;font-weight:800}.article-section-image[data-astro-cid-ktolayic]{border:1px solid color-mix(in srgb, var(--color-border) 82%, transparent);border-radius:var(--radius-lg);background:var(--ps-surface);box-shadow:var(--ps-raised-sm);overflow:hidden}.article-section-image[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{aspect-ratio:5/3;object-fit:cover;object-position:center 44%;width:100%;height:auto;max-height:34rem;display:block}.article-section-image[data-astro-cid-ktolayic] figcaption[data-astro-cid-ktolayic]{color:var(--color-text-subtle);font-size:var(--text-sm);padding:.85rem 1rem 1rem;line-height:1.5}.smart-method-layout[data-astro-cid-ktolayic],.calculation-method-layout[data-astro-cid-ktolayic]{display:flow-root}.worked-example-layout[data-astro-cid-ktolayic]{gap:var(--space-md);display:grid}.calculation-method-image[data-astro-cid-ktolayic]{float:left;width:min(34%,15.5rem);margin:0 clamp(1.5rem, 4vw, 2.5rem) var(--space-md) 0}.worked-example-image[data-astro-cid-ktolayic]{width:min(26%,9rem);min-width:8.5rem;margin:0}.worked-example-intro[data-astro-cid-ktolayic]{align-items:center;gap:clamp(1.35rem,3.5vw,2.35rem);display:flex}.worked-example-intro[data-astro-cid-ktolayic] p[data-astro-cid-ktolayic]{margin:0}.smart-method-image[data-astro-cid-ktolayic]{float:right;width:min(38%,18rem);margin:0 0 var(--space-md) clamp(1.5rem, 4vw, 2.5rem)}.calculation-method-image[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic],.worked-example-image[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic],.smart-method-image[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{filter:drop-shadow(0 1.35rem 1.8rem #44314c2e);width:100%;height:auto;display:block}.sleep-cycle-diagram[data-astro-cid-ktolayic]{border:1px solid color-mix(in srgb, var(--color-border) 82%, transparent);border-radius:var(--radius-lg);background:var(--ps-surface);box-shadow:var(--ps-raised-sm);overflow:hidden}.sleep-cycle-diagram__button[data-astro-cid-ktolayic]{border-radius:inherit;cursor:zoom-in;background:0 0;border:0;width:100%;padding:0;display:block;position:relative;overflow:hidden}.sleep-cycle-diagram[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{width:100%;height:auto;display:block}.sleep-cycle-diagram__hint[data-astro-cid-ktolayic]{border-radius:var(--radius-full);background:color-mix(in srgb, var(--ps-surface) 88%, transparent);min-height:2rem;box-shadow:var(--ps-raised-xs);color:var(--color-text);font-size:var(--text-sm);align-items:center;padding:.35rem .75rem;font-weight:800;display:inline-flex;position:absolute;bottom:.9rem;right:.9rem}.sleep-cycle-diagram[data-astro-cid-ktolayic] figcaption[data-astro-cid-ktolayic]{color:var(--color-text-subtle);font-size:var(--text-sm);padding:.85rem 1rem 1rem;line-height:1.5}.sleep-cycle-lightbox[data-astro-cid-ktolayic]{border:1px solid color-mix(in srgb, var(--color-border) 80%, transparent);border-radius:var(--radius-lg);background:var(--ps-surface);width:min(94vw,86rem);max-height:92vh;box-shadow:var(--ps-raised-lg);padding:clamp(.6rem,2vw,1rem);overflow:auto}.sleep-cycle-lightbox[data-astro-cid-ktolayic]::backdrop{backdrop-filter:blur(6px);background:#16111cad}.sleep-cycle-lightbox[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{border-radius:calc(var(--radius-lg) - 6px);width:100%;height:auto;display:block}.sleep-cycle-lightbox__close[data-astro-cid-ktolayic]{z-index:1;float:right;border-radius:var(--radius-full);background:var(--ps-surface);min-height:2.4rem;box-shadow:var(--ps-raised-sm);color:var(--color-text);cursor:pointer;font:inherit;border:0;margin:0 0 .55rem .55rem;padding:.4rem .9rem;font-weight:800;position:sticky;top:0}.article-cta[data-astro-cid-ktolayic]{gap:var(--space-md);display:grid}.formula-card[data-astro-cid-ktolayic]{gap:var(--space-sm);border-radius:var(--radius-lg);background:linear-gradient(135deg, color-mix(in srgb, var(--accent-periwinkle) 9%, transparent), transparent 52%), var(--ps-surface);box-shadow:var(--ps-inset-sm);padding:clamp(1rem,2vw,1.35rem);display:grid}.formula-row[data-astro-cid-ktolayic]{flex-wrap:wrap;align-items:center;gap:.55rem;min-height:3.35rem;display:flex}.formula-row[data-astro-cid-ktolayic]+.formula-row[data-astro-cid-ktolayic]{padding-top:var(--space-sm);border-top:1px solid color-mix(in srgb, var(--color-border) 76%, transparent)}.formula-result[data-astro-cid-ktolayic],.formula-chip[data-astro-cid-ktolayic],.formula-operator[data-astro-cid-ktolayic]{justify-content:center;align-items:center;min-height:2.45rem;line-height:1.15;display:inline-flex}.formula-result[data-astro-cid-ktolayic]{border-radius:var(--radius-full);background:color-mix(in srgb, var(--accent-mint) 20%, var(--ps-surface));box-shadow:var(--ps-raised-xs);color:var(--color-text);padding:.45rem .8rem;font-weight:900}.formula-chip[data-astro-cid-ktolayic]{border:1px solid color-mix(in srgb, var(--color-border) 80%, transparent);border-radius:var(--radius-full);background:color-mix(in srgb, var(--ps-surface) 88%, white);color:var(--color-text-muted);font-size:var(--text-sm);padding:.45rem .75rem;font-weight:800}.formula-chip--cycle[data-astro-cid-ktolayic]{color:var(--color-text)}.formula-operator[data-astro-cid-ktolayic]{width:1.55rem;color:var(--color-accent);font-size:1.15rem;font-weight:900}.table-scroll[data-astro-cid-ktolayic]{border-radius:var(--radius-lg);max-width:100%;overflow-x:auto}table[data-astro-cid-ktolayic]{border-collapse:collapse;border-radius:var(--radius-lg);background:var(--ps-surface);width:100%;min-width:42rem;box-shadow:var(--ps-raised-sm);overflow:hidden}th[data-astro-cid-ktolayic],td[data-astro-cid-ktolayic]{border-bottom:1px solid color-mix(in srgb, var(--color-border) 78%, transparent);text-align:left;vertical-align:top;padding:.9rem 1rem}th[data-astro-cid-ktolayic]{color:var(--color-text-subtle);font-size:var(--text-xs);letter-spacing:.12em;text-transform:uppercase;font-weight:800}.faq-list[data-astro-cid-ktolayic],.source-list[data-astro-cid-ktolayic]{gap:var(--space-sm);margin-top:var(--space-lg);display:grid}.source-grid[data-astro-cid-ktolayic]{gap:var(--space-xl);grid-template-columns:minmax(0,1.3fr) minmax(18rem,.7fr);align-items:start;display:grid}.source-title[data-astro-cid-ktolayic]{color:var(--color-text);font-weight:800}.faq-item[data-astro-cid-ktolayic]{padding:var(--space-md)}.faq-item[data-astro-cid-ktolayic] summary[data-astro-cid-ktolayic]{color:var(--color-text);cursor:pointer;font-weight:800}.faq-item[data-astro-cid-ktolayic] p[data-astro-cid-ktolayic]{margin-top:var(--space-sm)}.article-sidebar[data-astro-cid-ktolayic]{gap:var(--space-md);display:grid;position:sticky;top:6rem}.article-sidebar-card[data-astro-cid-ktolayic]{gap:var(--space-sm);display:grid}@media (width<=900px){.article-layout[data-astro-cid-ktolayic]{grid-template-columns:1fr}.article-sidebar[data-astro-cid-ktolayic]{position:static}.source-grid[data-astro-cid-ktolayic]{grid-template-columns:1fr}.calculation-method-image[data-astro-cid-ktolayic],.worked-example-image[data-astro-cid-ktolayic],.smart-method-image[data-astro-cid-ktolayic]{float:none;width:min(68vw,16rem);margin:var(--space-md) auto 0}.worked-example-image[data-astro-cid-ktolayic]{width:min(52vw,10rem);margin:0}}@media (width<=736px){.worked-example-intro[data-astro-cid-ktolayic]{align-items:flex-start;gap:var(--space-md)}.worked-example-image[data-astro-cid-ktolayic]{width:min(34vw,8.5rem);min-width:6.75rem}.article-feature-card[data-astro-cid-ktolayic]{grid-template-columns:1fr}.article-feature-card__media[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{aspect-ratio:16/9;min-height:10rem}.article-section-image[data-astro-cid-ktolayic] img[data-astro-cid-ktolayic]{aspect-ratio:4/3;max-height:24rem}.sleep-cycle-diagram__hint[data-astro-cid-ktolayic]{min-height:1.75rem;padding:.28rem .6rem;font-size:.78rem;bottom:.65rem;right:.65rem}}