/* =========================================================
   layout.css — app shell, topbar, sidebar, bottom-nav, page
   ========================================================= */

body {
  background: var(--bg);
  color: var(--ink);
}

.app-shell {
  display: grid;
  grid-template-rows: 64px 1fr 0;
  grid-template-columns: 1fr;
  min-height: 100vh;
}

/* TopBar (desktop) */
.topbar {
  grid-row: 1;
  display: flex;
  align-items: center;
  gap: var(--s-4);
  padding: 0 var(--s-6);
  background: var(--topbar);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.brand { flex: 0 0 auto; display: flex; align-items: center; gap: var(--s-2); }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-weight: 700; font-size: 15px; }
.brand-sub  { font-size: 10px; font-weight: 600; color: var(--muted); letter-spacing: 0.04em; }
.brand-logo {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--on-dark);
  display: grid;
  place-items: center;
  font-weight: 700; font-size: 14px;
  box-shadow: var(--shadow-2);
}
.topbar-nav { flex: 1 1 auto; display: flex; justify-content: center; gap: var(--s-1); }
.topbar-actions { flex: 0 0 auto; display: flex; gap: var(--s-2); align-items: center; }

/* Sidebar (tablet) */
.sidebar {
  display: none;
  width: 220px;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  flex-direction: column;
  padding: var(--s-4);
  gap: var(--s-3);
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 40;
}
.sidebar-brand {
  display: flex; align-items: center; gap: var(--s-2);
  padding: var(--s-2) var(--s-1) var(--s-3);
  border-bottom: 1px solid var(--border);
}
.sidebar-nav { display: flex; flex-direction: column; gap: var(--s-1); }
.sidebar-foot {
  margin-top: auto;
  padding: var(--s-3);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  text-align: center;
  font-size: 11px;
  color: var(--muted);
}

/* Bottom-nav (mobile) */
.bottom-nav {
  display: none;
  grid-row: 3;
  height: 64px;
  background: var(--bottom);
  border-top: 1px solid var(--border);
  position: sticky;
  bottom: 0;
  z-index: 50;
  align-items: center;
  justify-content: space-around;
  padding: 0 var(--s-2);
  box-shadow: 0 -4px 14px rgba(40, 22, 10, 0.06);
}

/* Page area */
.page { grid-row: 2; background: var(--bg); overflow: auto; }
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--s-6) var(--s-6) var(--s-10);
  min-height: 100%;
}

/* Page header */
.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-4);
  margin-bottom: var(--s-6);
}
.ph-text { display: flex; flex-direction: column; gap: var(--s-1); flex: 1; min-width: 0; }
.ph-title {
  font-family: 'Fraunces', 'Georgia', serif;
  font-size: 32px;
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.015em;
}
.ph-sub {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: 14px;
  color: var(--muted);
}
.ph-actions { display: flex; gap: var(--s-2); flex-wrap: wrap; }
.back-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
}
.back-link:hover { color: var(--ink); }