/* Layout shells — app (with sidebar), guest, page containers */

.app-shell { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }
.app-shell.no-sidebar { grid-template-columns: 1fr; }
.main-col { min-width: 0; }

.page { max-width: var(--container-xl); margin: 0 auto; padding: var(--space-6) var(--space-5) var(--space-16); }
.page-md { max-width: var(--container-md); margin: 0 auto; padding: var(--space-6) var(--space-5) var(--space-16); }
.page-lg { max-width: 100%; padding: var(--space-6) var(--space-6) var(--space-16); }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-5); }
.section-head h2 { font-size: 20px; }
.section-head p { margin: 4px 0 0; font-size: 13px; color: var(--ink-500); }

.grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--space-5); }
.grid-feed { display: grid; grid-template-columns: 1fr; gap: var(--space-5); max-width: var(--container-md); margin: 0 auto; }
@media (min-width: 900px) {
  .grid-feed { grid-template-columns: 1fr 1fr; max-width: var(--container-xl); }
}

.guest-shell { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: var(--space-6); background: var(--paper); }
.guest-card { width: 100%; max-width: 440px; background: var(--paper-raised); border: 1px solid var(--line-subtle); border-radius: var(--radius-lg); padding: var(--space-8); }
.guest-card.wide { max-width: 560px; }
.guest-brand { display: flex; align-items: center; justify-content: center; gap: var(--space-3); margin-bottom: var(--space-6); }
.guest-brand .mark { width: 40px; height: 40px; border-radius: var(--radius-md); background: var(--ink-900); color: var(--paper); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.guest-brand b { font-size: 18px; letter-spacing: -0.01em; }

.site-footer { border-top: 1px solid var(--line-subtle); padding: var(--space-8) var(--space-5); text-align: center; color: var(--ink-500); font-size: 12.5px; }
.site-footer b { color: var(--ink-900); }

.muted { color: var(--ink-500); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }