.site-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.container {
  width: min(100% - (2 * var(--container-gutter)), var(--container-max));
  margin-inline: auto;
}

.site-header {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  gap: var(--space-6);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-toggle {
  display: none;
}

.site-main {
  padding-block: var(--space-10);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: #0c1b2b;
}

.site-footer__inner {
  padding-block: var(--space-10);
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: var(--space-8);
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-block: var(--space-4);
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 980px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  /* site-nav gerenciado pelo bloco de drawer mais abaixo */

  .site-header__inner {
    min-height: 68px;
    flex-wrap: nowrap;
    padding-block: var(--space-2);
    gap: var(--space-3);
  }

  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }
}

/* ===== Header — sticky lift + mobile nav drawer ===== */

.site-header {
  transition: box-shadow 200ms ease, background-color 200ms ease, border-color 200ms ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 28px rgba(15, 94, 168, 0.08);
  border-bottom-color: transparent;
}

.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0 0 0 0;
  background: rgba(12, 27, 43, 0.45);
  backdrop-filter: blur(2px);
  z-index: 18;
  opacity: 0;
  transition: opacity 220ms ease;
}

.nav-backdrop[hidden] {
  display: none;
}

.nav-backdrop.is-active {
  display: block;
  opacity: 1;
}

/* Hamburger button — hidden by default, visible only on mobile */

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  cursor: pointer;
  color: var(--color-text);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
  -webkit-tap-highlight-color: transparent;
}

.nav-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.nav-toggle:active {
  transform: scale(0.96);
}

.nav-toggle__bars {
  position: relative;
  width: 22px;
  height: 16px;
  display: block;
}

.nav-toggle__bars span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 260ms cubic-bezier(0.4, 0, 0.2, 1), opacity 200ms ease, top 260ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-toggle__bars span:nth-child(1) { top: 0; }
.nav-toggle__bars span:nth-child(2) { top: 7px; }
.nav-toggle__bars span:nth-child(3) { top: 14px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  top: 7px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.2);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  top: 7px;
  transform: rotate(-45deg);
}

/* Mobile breakpoint — drawer behaviour */

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-header__inner {
    flex-wrap: nowrap;
    min-height: 68px;
    padding-block: var(--space-3);
  }

  .logo__image {
    width: 140px;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 88vw);
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: var(--space-8) var(--space-6) var(--space-8);
    padding-top: calc(68px + var(--space-6));
    background: #ffffff;
    border-left: 1px solid var(--color-border);
    box-shadow: -12px 0 40px rgba(15, 94, 168, 0.15);
    transform: translateX(100%);
    transition: transform 300ms cubic-bezier(0.32, 0.72, 0, 1);
    overflow-y: auto;
    z-index: 200;
    visibility: hidden;
  }

  .site-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav .nav-link {
    display: block;
    padding: var(--space-3) 0;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(16, 33, 50, 0.06);
  }

  .site-nav .nav-link[aria-current="page"] {
    color: var(--color-primary);
  }

  .site-nav .nav-cta {
    margin-top: var(--space-4);
    justify-content: center;
    width: 100%;
  }

  /* Prevent body scroll when drawer open */
  body.has-nav-open {
    overflow: hidden;
  }
}