/* ==========================================================================
   Layout: container, seções, cabeçalho e rodapé
   ========================================================================== */

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

.section { position: relative; padding-block: var(--section-y); }
.section--soft { background: var(--bg-soft); }
.section--dark { color: var(--white); background: var(--black); }
.section--tight { padding-block: clamp(48px, 6vw, 96px); }

.section-head { max-width: 760px; margin-bottom: clamp(48px, 6vw, 80px); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head__sub { max-width: 600px; margin: 22px auto 0; color: var(--ink-2); }

/* Barra de progresso de leitura */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: 3px;
  pointer-events: none;
}
.scroll-progress span {
  display: block;
  height: 100%;
  background: var(--yellow);
  transform-origin: left;
  transform: scaleX(0);
}

/* Cabeçalho -------------------------------------------------------------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  transition: background-color .4s var(--ease), box-shadow .4s var(--ease), transform .45s var(--ease);
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, .86);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  backdrop-filter: saturate(1.6) blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.site-header.is-hidden { transform: translateY(-100%); }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
}

.brand { display: inline-flex; align-items: center; gap: 10px; line-height: 1; }
.brand__mark { width: 24px; height: auto; flex: none; transition: transform .5s var(--ease); }
.brand:hover .brand__mark { transform: rotate(-8deg) scale(1.06); }
.brand__text { display: flex; flex-direction: column; }
.brand__name { font-family: var(--font-display); font-size: 1.55rem; letter-spacing: .02em; line-height: .9; }
.brand__tag {
  margin-top: 2px;
  font-size: .56rem;
  font-weight: 700;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--blue);
}
.brand--light { color: var(--white); }
.brand--light .brand__tag { color: var(--yellow); }

.nav { display: flex; align-items: center; gap: 32px; }
.nav__list {
  display: flex;
  gap: 4px;
  padding: 5px;
  border-radius: var(--r-full);
  background: rgba(14, 17, 22, .04);
}
.nav__list a {
  display: block;
  padding: 8px 16px;
  font-size: .86rem;
  font-weight: 600;
  color: var(--ink-2);
  border-radius: var(--r-full);
  transition: color .25s, background-color .25s;
}
.nav__list a:hover { color: var(--ink); }
.nav__list a.is-active { color: var(--ink); background: var(--white); box-shadow: var(--sh-sm); }

.nav-toggle {
  display: none;
  width: 46px; height: 46px;
  border-radius: var(--r-full);
  background: var(--black);
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px; height: 2px;
  margin-inline: auto;
  border-radius: 2px;
  background: var(--white);
  transition: transform .4s var(--ease), background-color .2s;
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before, .nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 960px) {
  .nav-toggle { display: block; position: relative; z-index: 2; }

  .nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: space-between;
    gap: 0;
    padding: calc(var(--header-h) + 24px) var(--gutter) 40px;
    background: var(--white);
    visibility: hidden;
    opacity: 0;
    transition: opacity .4s var(--ease), visibility 0s linear .4s;
  }
  .nav.is-open { visibility: visible; opacity: 1; transition: opacity .4s var(--ease), visibility 0s; }
  .nav__list { flex-direction: column; gap: 0; padding: 0; background: none; }
  .nav__list li {
    border-bottom: 1px solid var(--line);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .5s var(--ease), transform .5s var(--ease);
  }
  .nav.is-open .nav__list li { opacity: 1; transform: none; }
  .nav.is-open .nav__list li:nth-child(2) { transition-delay: .05s; }
  .nav.is-open .nav__list li:nth-child(3) { transition-delay: .1s; }
  .nav.is-open .nav__list li:nth-child(4) { transition-delay: .15s; }
  .nav__list a {
    padding: 18px 0;
    font-family: var(--font-display);
    font-size: 2.6rem;
    font-weight: 400;
    line-height: 1;
    color: var(--ink);
    border-radius: 0;
  }
  .nav__list a.is-active { background: none; box-shadow: none; color: var(--blue); }
  .nav__cta { justify-content: center; }
  .site-header__inner .brand { position: relative; z-index: 2; }
  body.nav-open { overflow: hidden; }
}

/* Rodapé ----------------------------------------------------------------- */

.site-footer { color: rgba(255, 255, 255, .62); background: var(--black); font-size: .88rem; }
.site-footer__grid { display: grid; gap: 40px; padding-block: 80px 56px; }
.site-footer__brand p { max-width: 280px; margin-top: 18px; }
.site-footer__title {
  display: block;
  margin-bottom: 14px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--white);
}
.site-footer__col a { transition: color .2s; word-break: break-word; }
.site-footer__col a:hover { color: var(--yellow); }
.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding-block: 24px 100px;
  font-size: .78rem;
  border-top: 1px solid var(--line-dark);
}
.site-footer__base a:hover { color: var(--white); }

@media (min-width: 760px) {
  .site-footer__grid { grid-template-columns: 1.4fr 1fr 1.4fr 1fr; }
  .site-footer__base { padding-bottom: 28px; }
}