.page-shell{margin:0 auto 1.2rem;padding:0 .5rem 1.2rem;width:100%;max-width:100%;min-width:0;box-sizing:border-box;border-radius:0;box-shadow:none;display:block;content-visibility:auto;contain-intrinsic-size:1px 700px}.page-shell__header{display:flex;align-items:center;gap:.35rem;margin:0 0 .55rem;padding:.55rem .6rem;position:sticky;top:.35rem;z-index:var(--z-nav);border-radius:var(--radius-card);border:1px solid var(--surface-stroke, var(--color-border));background:color-mix(in srgb,var(--color-surface-chrome) 92%,transparent);backdrop-filter:blur(10px);box-shadow:var(--shadow-subtle)}.page-shell__back-button{display:flex;align-items:center;justify-content:center;width:32px;height:32px;margin-right:.2rem;border-radius:var(--radius-round);border:1px solid color-mix(in srgb,var(--color-primary) 22%,var(--surface-stroke, var(--color-border)));background:color-mix(in srgb,var(--color-primary) 10%,transparent);color:var(--color-primary);font-size:1rem;text-decoration:none;box-shadow:none;transition:color .18s,border-color .18s,background .18s;cursor:pointer}.page-shell__back-button:hover,.page-shell__back-button:focus{color:var(--color-link);background:color-mix(in srgb,var(--color-primary) 18%,transparent);border-color:color-mix(in srgb,var(--color-primary) 34%,var(--surface-stroke, var(--color-border)))}.page-shell__back-icon{display:flex;align-items:center;justify-content:center;color:inherit;font-size:1rem;font-weight:700;vertical-align:middle}.page-shell__title{margin-left:0;padding:0;color:var(--color-text);font-size:1.08rem;font-weight:700;letter-spacing:.01em;vertical-align:middle}@media (min-width: 601px){.page-shell__header{gap:.55rem;padding:.65rem .75rem;top:.6rem}.page-shell__back-button{width:34px;height:34px;font-size:1.2rem}.page-shell__back-icon{font-size:1.2rem}.page-shell__title{padding:0;font-size:1.35rem}.page-shell.page-shell--narrow{width:auto;max-width:700px;margin:0 auto 2rem;padding:0 1rem 2rem;box-sizing:border-box}.page-shell--narrow .post-card{width:100%;max-width:100%}}