/* ============================================================
   layout.css — Estrutura do app (shell) + navegação + responsivo.
   Três layouts DISTINTOS (não só escala):
     Desktop  >=1024px : sidebar com rótulos + conteúdo
     Tablet   640-1023 : sidebar como rail de ícones
     Mobile   <640px   : topbar + barra de abas inferior
   ============================================================ */

.app-shell {
  display: grid;
  /* largura corrente da sidebar (animável durante o arraste) */
  --side-current: var(--rail-w);
  /* a GRADE sempre reserva só o rail; a sidebar expandida sobrepõe a interface */
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  /* dvh evita distorção com a barra de endereço do navegador móvel */
  grid-template-rows: 100vh;
  grid-template-rows: 100dvh;
  height: 100vh;
  height: 100dvh;
}
.app-shell.is-expanded { --side-current: var(--sidebar-w); }
.app-shell:not(.is-dragging) .sidebar { transition: width var(--t-mid); }

/* ---------------- Sidebar (sobrepõe o conteúdo) ---------------- */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: var(--z-nav);
  width: var(--side-current);
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding: var(--s-4) var(--s-3);
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
}
/* sombra só quando expandida (flutuando sobre a interface) */
.app-shell.is-expanded .sidebar { box-shadow: var(--shadow-pop); }
/* scrim escurece a interface atrás da sidebar expandida */
.app-shell.is-expanded .sidebar__scrim {
  display: block;
  position: fixed; inset: 0;
  background: var(--scrim);
  z-index: var(--z-sticky);
}

/* ---- Estado COMPRIMIDO (rail): só ícones ---- */
.app-shell:not(.is-expanded) .sidebar { padding: var(--s-4) var(--s-2); align-items: center; }
.app-shell:not(.is-expanded) .brand { padding: var(--s-2) 0 var(--s-4); justify-content: center; }
.app-shell:not(.is-expanded) .brand > a { display: none; } /* só hambúrguer no rail */
.app-shell:not(.is-expanded) .brand__name { display: none; }
.app-shell:not(.is-expanded) .nav-group__title { display: none; }
.app-shell:not(.is-expanded) .nav-item { justify-content: center; padding: var(--s-3); }
.app-shell:not(.is-expanded) .nav-item__label { display: none; }
.app-shell:not(.is-expanded) .nav-item__badge { position: absolute; top: 4px; right: 4px; min-width: 16px; height: 16px; padding: 0 4px; }
.app-shell:not(.is-expanded) .me-chip__info { display: none; }
.app-shell:not(.is-expanded) .me-chip { justify-content: center; }
.app-shell:not(.is-expanded) .theme-switch { display: none; }
.app-shell:not(.is-expanded) .sidebar__hamburger { margin: 0 auto; }

/* ---- Alça de arraste na borda direita da sidebar ---- */
.sidebar__handle {
  position: absolute;
  top: 0; right: -4px;
  width: 10px; height: 100%;
  cursor: ew-resize;
  z-index: 5;
  touch-action: none;
}
.sidebar__handle::after {
  content: "";
  position: absolute;
  top: 0; left: 4px;
  width: 2px; height: 100%;
  background: transparent;
  transition: background var(--t-fast);
}
.sidebar__handle:hover::after,
.app-shell.is-dragging .sidebar__handle::after { background: var(--accent); }

/* botão hambúrguer no topo da sidebar */
.sidebar__hamburger {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: var(--r-md);
  color: var(--text-dim);
  flex: none;
  transition: background var(--t-fast), color var(--t-fast);
}
.sidebar__hamburger:hover { background: var(--surface-2); color: var(--text); }
.brand {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-2) var(--s-3) var(--s-4);
}
.brand__mark {
  width: 38px; height: 38px;
  border-radius: var(--r-md);
  display: grid; place-items: center;
  color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow-soft);
}
.brand__name { font-size: var(--fs-xl); font-weight: var(--fw-bold); letter-spacing: -0.02em; }
.brand__label { display: inline; }

.nav-group { display: flex; flex-direction: column; gap: 2px; }
.nav-group__title {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  padding: var(--s-3) var(--s-3) var(--s-1);
}
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-3);
  border-radius: var(--r-md);
  color: var(--text-dim);
  font-weight: var(--fw-medium);
  transition: background var(--t-fast), color var(--t-fast);
  position: relative;
}
.nav-item:hover { background: var(--surface-2); color: var(--text); }
.nav-item.is-active { background: var(--accent-soft); color: var(--accent); }
.nav-item.is-active svg.icon { color: var(--accent); }
.nav-item__label { flex: 1; min-width: 0; }
.nav-item__badge {
  min-width: 20px; height: 20px; padding: 0 6px;
  border-radius: var(--r-pill);
  background: var(--accent); color: var(--on-accent);
  font-size: var(--fs-xs); font-weight: var(--fw-bold);
  display: grid; place-items: center;
}
.sidebar__spacer { flex: 1; }
.sidebar__foot { display: flex; flex-direction: column; gap: 2px; }

/* mini perfil no rodapé da sidebar */
.me-chip {
  display: flex; align-items: center; gap: var(--s-3);
  padding: var(--s-2); border-radius: var(--r-md);
  transition: background var(--t-fast);
}
.me-chip:hover { background: var(--surface-2); }
.me-chip__info { min-width: 0; }
.me-chip__name { font-weight: var(--fw-semibold); font-size: var(--fs-sm); }
.me-chip__handle { color: var(--text-mute); font-size: var(--fs-xs); }

/* ---------------- Main + topbar + view ---------------- */
.main {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  height: 100dvh;
}
.topbar {
  height: var(--topbar-h);
  flex: none;
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 0 var(--s-5);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: var(--z-sticky);
}
.topbar__title { font-size: var(--fs-lg); font-weight: var(--fw-bold); }
.topbar__back { display: none; }
.topbar .brand { display: none; padding: 0; }

.view {
  flex: 1;
  min-height: 0;
  min-width: 0;
  overflow-y: auto;
  overflow-x: hidden;       /* nada vaza na horizontal */
  scroll-behavior: smooth;
  display: flex;
  flex-direction: column;
}
/* telas "flush" (ex.: Chats) preenchem toda a altura sem padding */
.view.is-flush { padding: 0; overflow: hidden; }
.view.is-flush > * { flex: 1; min-height: 0; }
.view__inner {
  width: 100%;
  max-width: var(--content-max);
  min-width: 0;
  margin: 0 auto;
  padding: var(--s-5);
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
}
/* filhos diretos não podem inflar o container (rail tem largura própria) */
.view__inner > * { min-width: 0; }
.view__inner--wide { max-width: 1600px; }
.view__inner--flush { padding: 0; max-width: none; flex: 1; }

/* ---------------- Barra de abas inferior (mobile) ---------------- */
.bottom-nav {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: calc(var(--bottomnav-h) + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  z-index: var(--z-nav);
}
.bottom-nav__list { display: flex; height: var(--bottomnav-h); }
.bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--text-mute);
  font-size: 11px;
  font-weight: var(--fw-medium);
  position: relative;
}
.bottom-nav__item.is-active { color: var(--accent); }
.bottom-nav__item .dot {
  position: absolute; top: 6px; right: 50%; transform: translateX(14px);
  width: 8px; height: 8px; border-radius: 50%; background: var(--danger);
}

/* scrim oculto por padrão (some quando sidebar não está expandida) */
.sidebar__scrim { display: none; }

/* ---------------- Modo imersivo (tela própria: sem topbar/abas) ---------------- */
.app-shell.is-immersive .topbar { display: none; }
.app-shell.is-immersive .bottom-nav { display: none; }
.app-shell.is-immersive .view { padding-bottom: 0; }

/* ============================================================
   TABLET — apenas ajusta o respiro do conteúdo
   (a sidebar já sobrepõe a interface em todas as larguras).
   ============================================================ */
@media (max-width: 1023px) {
  .view__inner { padding: var(--s-4); }
}

/* ============================================================
   MOBILE — topbar + barra de abas inferior, sem sidebar
   ============================================================ */
@media (max-width: 639px) {
  .app-shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar, .sidebar__scrim,
  .app-shell.is-expanded .sidebar,
  .app-shell.is-expanded .sidebar__scrim { display: none; }
  .main { grid-column: 1; }
  .topbar { padding: 0 var(--s-4); }
  .topbar .brand { display: flex; }
  .topbar__title { display: none; }
  .topbar.has-back .brand { display: none; }
  .topbar.has-back .topbar__title { display: block; }
  .topbar__back { display: inline-grid; }
  .view { padding-bottom: calc(var(--bottomnav-h) + 16px); }
  .view__inner { padding: var(--s-4) var(--s-4) var(--s-6); gap: var(--s-4); }
  /* telas full-bleed (perfil) não recebem padding no mobile */
  .view__inner--flush { padding: 0; gap: 0; }
  .bottom-nav { display: block; }
}

/* ============================================================
   ORIENTAÇÃO PAISAGEM / TELAS BAIXAS — evita que topbar + abas
   inferiores comam a altura útil em celulares deitados.
   ============================================================ */
@media (max-width: 1023px) and (orientation: landscape) and (max-height: 560px) {
  :root { --topbar-h: 48px; --bottomnav-h: 52px; }
  .view__inner { padding: var(--s-3) var(--s-4); gap: var(--s-3); }
  .bottom-nav__item { font-size: 10px; }
  .bottom-nav__item svg.icon { width: 18px; height: 18px; }
  /* large title ocupa menos no topo quando há pouca altura */
  .large-title__text { font-size: var(--fs-2xl); }
}