/* App shell. Mobile-first:
     < 900px   top bar compatta + tab bar in basso (come un'app nativa)
     ≥ 900px   sidebar fissa a sinistra + top bar larga, niente tab bar
   Le due presentazioni condividono lo stesso HTML. */

.shell { min-height: 100dvh; display: flex; flex-direction: column; }
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: var(--z-topbar);
  display: flex; align-items: center; gap: var(--s-3);
  min-height: calc(var(--topbar-h) + var(--safe-t));
  padding: var(--safe-t) var(--s-4) 0;
  background: rgba(255, 255, 255, .86);
  -webkit-backdrop-filter: saturate(1.6) blur(16px);
  backdrop-filter: saturate(1.6) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.topbar.is-stuck { border-bottom-color: var(--line); }
.topbar__brand { display: flex; align-items: center; gap: var(--s-2); color: var(--ink); font: 600 1.25rem/1 var(--font-serif); letter-spacing: .01em; }
.topbar__brand:hover { text-decoration: none; }
.topbar__title {
  font: 600 1.0625rem/1 var(--font-serif); opacity: 0; transform: translateY(4px);
  transition: opacity .2s, transform .2s var(--ease);
}
.topbar.is-stuck .topbar__title { opacity: 1; transform: none; }
.topbar__spacer { flex: 1; }
.topbar__search { display: none; }

.monogram {
  display: grid; place-items: center; width: 34px; height: 34px; flex: none;
  border-radius: 10px; background: var(--ink); color: #fff;
  font: 600 .9375rem/1 var(--font-serif); letter-spacing: .02em;
}

/* pill della struttura corrente: sempre visibile, col suo colore */
.struttura-pill {
  display: inline-flex; align-items: center; gap: var(--s-2);
  max-width: 46vw; height: 36px; padding: 0 var(--s-3) 0 var(--s-2);
  border: 1px solid var(--line); border-radius: var(--r-pill); background: var(--bg);
  font-size: var(--fs-sm); font-weight: 600;
  box-shadow: var(--shadow-1);
}
.struttura-pill[disabled] { cursor: default; box-shadow: none; }
.struttura-pill .ic { color: var(--ink-3); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--c, var(--struttura)); flex: none; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .08); }
.dot--lg { width: 14px; height: 14px; }

.avatar {
  display: grid; place-items: center; width: 36px; height: 36px; flex: none; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent-strong); font-size: var(--fs-sm); font-weight: 700;
}
.avatar--lg { width: 64px; height: 64px; font-size: 1.25rem; }

/* ---------- contenuto ---------- */
.content {
  flex: 1; width: 100%; max-width: var(--content-max); margin: 0 auto;
  padding: var(--s-2) var(--s-4) calc(var(--tabbar-h) + var(--safe-b) + var(--s-7));
}
.page-head { display: flex; flex-wrap: wrap; align-items: flex-end; gap: var(--s-3) var(--s-4); padding: var(--s-3) 0 var(--s-5); }
.page-head__text { flex: 1 1 240px; min-width: 0; }
.page-head__text .eyebrow { display: block; margin-bottom: var(--s-2); }
.page-head__lead { margin-top: var(--s-2); color: var(--ink-2); max-width: 60ch; }
.page-head__actions { display: flex; gap: var(--s-2); flex-wrap: wrap; }
.back-link { display: inline-flex; align-items: center; gap: var(--s-1); margin-bottom: var(--s-2); color: var(--ink-2); font-size: var(--fs-sm); font-weight: 500; }

.section { margin-top: var(--s-7); }
.section__head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); margin-bottom: var(--s-3); }
.stack > * + * { margin-top: var(--s-4); }
.stack-sm > * + * { margin-top: var(--s-2); }
.row { display: flex; align-items: center; gap: var(--s-3); flex-wrap: wrap; }
.row--between { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.grid { display: grid; gap: var(--s-4); }
.grid--tiles { grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.grid--2 { grid-template-columns: 1fr; }

/* ---------- tab bar (mobile) ---------- */
.tabbar {
  position: fixed; inset: auto 0 0 0; z-index: var(--z-tabbar);
  display: flex; justify-content: space-around;
  height: calc(var(--tabbar-h) + var(--safe-b)); padding: 6px var(--s-2) var(--safe-b);
  background: rgba(255, 255, 255, .92);
  -webkit-backdrop-filter: saturate(1.6) blur(18px);
  backdrop-filter: saturate(1.6) blur(18px);
  border-top: 1px solid var(--line);
}
.tabbar__item {
  flex: 1; max-width: 96px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  color: var(--ink-3); font-size: .6875rem; font-weight: 600; letter-spacing: .01em; border-radius: var(--r-md);
  transition: color .15s, transform .15s var(--ease);
}
.tabbar__item:hover { text-decoration: none; }
.tabbar__item:active { transform: scale(.94); }
.tabbar__item.is-active { color: var(--accent-strong); }

/* ---------- sidebar (desktop) ---------- */
.sidebar { display: none; }

@media (min-width: 600px) {
  .content { padding-left: var(--s-6); padding-right: var(--s-6); }
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .shell { flex-direction: row; }
  .tabbar { display: none; }

  .sidebar {
    position: sticky; top: 0; z-index: var(--z-sidebar);
    display: flex; flex-direction: column; flex: none;
    width: var(--sidebar-w); height: 100dvh; padding: var(--s-5) var(--s-3) var(--s-4);
    background: var(--surface); border-right: 1px solid var(--line); overflow-y: auto;
  }
  .sidebar__brand { display: flex; align-items: center; gap: var(--s-3); padding: 0 var(--s-3) var(--s-5); color: var(--ink); }
  .sidebar__brand:hover { text-decoration: none; }
  .sidebar__brand-name { font: 600 1.375rem/1.05 var(--font-serif); }
  .sidebar__brand-sub { display: block; margin-top: 2px; font: 600 .625rem/1 var(--font-sans); letter-spacing: .16em; text-transform: uppercase; color: var(--accent-strong); }
  .sidebar__section { margin-top: var(--s-5); }
  .sidebar__label { padding: 0 var(--s-3) var(--s-2); }
  .sidebar__foot { margin-top: auto; padding-top: var(--s-4); }

  .navlink {
    display: flex; align-items: center; gap: var(--s-3); padding: 9px var(--s-3); border-radius: var(--r-sm);
    color: var(--ink-2); font-size: var(--fs-md); font-weight: 500; transition: background .12s, color .12s;
  }
  .navlink:hover { background: var(--surface-2); color: var(--ink); text-decoration: none; }
  .navlink.is-active { background: var(--bg); color: var(--ink); font-weight: 600; box-shadow: var(--shadow-1), inset 0 0 0 1px var(--line); }
  .navlink.is-active .ic { color: var(--accent-strong); }

  .topbar { padding: 0 var(--s-7); background: rgba(255, 255, 255, .9); }
  .topbar__brand { display: none; }
  .topbar__search {
    display: inline-flex; align-items: center; gap: var(--s-2); height: 36px; padding: 0 var(--s-3);
    min-width: 240px; border: 1px solid var(--line); border-radius: var(--r-pill); background: var(--surface);
    color: var(--ink-3); font-size: var(--fs-sm);
  }
  .topbar__search kbd { margin-left: auto; font: 600 .6875rem/1 var(--font-sans); padding: 3px 6px; border-radius: 5px; background: var(--bg); border: 1px solid var(--line); }
  .struttura-pill { max-width: 280px; }

  .content { padding: var(--s-4) var(--s-7) var(--s-8); }
  .page-head { padding-top: var(--s-5); }
}

@media (min-width: 1280px) {
  .grid--tiles { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}

/* ---------- layout "auth" (login, invito, reset) ---------- */
.auth {
  min-height: 100dvh; display: grid; place-items: center;
  padding: calc(var(--safe-t) + var(--s-6)) var(--s-4) calc(var(--safe-b) + var(--s-6));
  background:
    radial-gradient(900px 480px at 85% -10%, var(--accent-soft), transparent 60%),
    radial-gradient(700px 420px at -10% 110%, var(--surface-2), transparent 60%),
    var(--bg);
}
.auth__card { width: 100%; max-width: 420px; }
.auth__brand { display: flex; flex-direction: column; align-items: center; gap: var(--s-3); margin-bottom: var(--s-7); text-align: center; }
.auth__brand .monogram { width: 56px; height: 56px; border-radius: 16px; font-size: 1.5rem; }
.auth__name { font: 600 2rem/1 var(--font-serif); }
.auth__rule { width: 44px; height: 2px; background: var(--gold); border-radius: 2px; }
.auth__foot { margin-top: var(--s-6); text-align: center; font-size: var(--fs-sm); color: var(--ink-3); }

@media print {
  .sidebar, .topbar, .tabbar, .toasts, .page-head__actions { display: none !important; }
  .content { padding: 0; max-width: none; }
}