/* =====================================================================
   layout.css — Estrutura: casca (shell), sidebar e coluna de conteúdo
   Mobile-first. Sidebar vira gaveta no mobile e trilho fixo no desktop.
   ===================================================================== */

.shell {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* ---------------------------------------------------------------------
   SIDEBAR
   Mobile: gaveta deslizante a partir da esquerda (escondida por padrão).
   Desktop (>=1024px): trilho fixo de 303px sempre visível.
   --------------------------------------------------------------------- */
.site-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: calc(var(--space) * 6);
  width: min(86vw, 340px);
  height: 100dvh;
  padding: calc(var(--space) * 12) calc(var(--space) * 8);
  background-color: var(--color-bg-light);
  overflow-y: auto;
  overflow-x: clip;
  scrollbar-gutter: stable;
  transform: translateX(-102%);
  transition: transform var(--duration-slow) var(--ease-out-soft);
}
.site-sidebar.is-open {
  transform: translateX(0);
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: rgba(36, 36, 36, 0.38);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-base) ease,
    visibility var(--duration-base) ease;
}
.sidebar-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

/* Handle "aba" que abre a sidebar (mobile). Pílula vertical, centralizada
   na borda esquerda — um alvo de toque claro e discreto. */
.sidebar-tab {
  position: fixed;
  left: 0;
  top: 50%;
  z-index: 44;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--space) * 2.5) calc(var(--space) * 1.5)
    calc(var(--space) * 2.5) calc(var(--space) * 1);
  background: var(--color-bg-light);
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  box-shadow: var(--shadow-card);
  color: var(--color-ink-dim);
  transition: padding-left var(--duration-base) var(--ease-out-soft),
    color var(--duration-base) ease;
}
.sidebar-tab:hover,
.sidebar-tab:focus-visible {
  padding-left: calc(var(--space) * 2);
  color: var(--color-ink);
}
.sidebar-tab-dots {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.sidebar-tab-dots span {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
}
.sidebar-tab-arrow {
  font-size: 1.25rem;
  line-height: 1;
  animation: nudge 2.4s var(--ease-in-out-soft) infinite;
}
@keyframes nudge {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(2px); }
}

.sidebar-close {
  position: absolute;
  top: calc(var(--space) * 4);
  right: calc(var(--space) * 5);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--color-ink-dim);
}

/* ---------------------------------------------------------------------
   COLUNA DE CONTEÚDO
   --------------------------------------------------------------------- */
.main {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: calc(var(--space) * 8);
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: calc(var(--space) * 22) var(--gutter) calc(var(--space) * 6);
}

.page-case .main {
  padding-top: calc(var(--space) * 12);
}

/* ---------------------------------------------------------------------
   DESKTOP — sidebar vira trilho fixo, conteúdo ganha o espaço restante.
   "Mobile-first" preservado: tudo acima é o estado base.
   --------------------------------------------------------------------- */
@media (min-width: 1024px) {
  .shell {
    flex-direction: row;
  }
  .site-sidebar {
    position: sticky;
    top: 0;
    transform: none;
    width: var(--sidebar-w);
    flex-shrink: 0;
    height: 100dvh;
    align-self: flex-start;
    align-items: stretch;
    text-align: left;
    padding: calc(var(--space) * 10) calc(var(--space) * 8);
  }
  .sidebar-tab,
  .sidebar-backdrop,
  .sidebar-close {
    display: none;
  }
  .main {
    padding-top: calc(var(--space) * 14);
    padding-inline: calc(var(--space) * 12);
    margin-inline: 0;
    max-width: none;
    align-items: center;
  }
  .page-case .main {
    padding-top: calc(var(--space) * 8);
  }
  .main > * {
    width: 100%;
    max-width: var(--content-max);
  }
}