/* ============================================================
   layout.css — Estrutura e composição espacial
   Header, main, seções, hero, footer e textura de fundo.
   ============================================================ */

body {
  font-family: var(--font-serif);
  color: var(--text);
  background: var(--bg-base);
  line-height: var(--lh-base);
  overflow-x: hidden;
}

/* Textura heráldica de fundo (losangos + halos sutis) ------ */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    radial-gradient(circle at 20% 18%, rgba(245, 235, 216, 0.05), transparent 30%),
    radial-gradient(circle at 82% 72%, rgba(245, 235, 216, 0.05), transparent 30%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cpath d='M30 0 L60 30 L30 60 L0 30 Z' fill='none' stroke='%23BB0B1E' stroke-width='0.5' opacity='0.07'/%3E%3C/svg%3E");
}

/* Conteúdo acima da textura */
.site-header,
main,
section,
.site-footer {
  position: relative;
  z-index: 2;
}

/* ---- Link "pular para o conteúdo" (acessibilidade) ------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: var(--z-skip);
  padding: 12px 20px;
  background: var(--cream);
  color: var(--st-george);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus {
  top: 16px;
}

/* ---- Cabeçalho fixo ------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px var(--gutter-lg);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background var(--t-mid) var(--ease),
    padding var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease);
}
.site-header.is-scrolled {
  background: var(--header-scrolled);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 16px var(--gutter-lg);
  border-bottom: 1px solid var(--border-soft);
}

.wordmark img {
  height: 38px;
  width: auto;
  transition: height var(--t-mid) var(--ease);
}
.site-header.is-scrolled .wordmark img {
  height: 32px;
}

.primary-nav {
  display: flex;
  align-items: center;
}

/* ---- Seções genéricas ----------------------------------- */
section {
  padding: var(--space-section) var(--gutter);
}

.wrap {
  max-width: var(--maxw);
  margin-inline: auto;
}
.wrap--wide {
  max-width: var(--maxw-wide);
}
.wrap--narrow {
  max-width: var(--maxw-narrow);
}

/* ---- HERO ----------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px var(--gutter);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(187, 11, 30, 0.55), transparent 60%),
    var(--st-george);
}
.hero > * {
  position: relative;
  z-index: 1;
}
.hero__logo {
  width: min(270px, 48vw);
  height: auto;
  margin-bottom: 30px;
}
.hero__title {
  font-size: var(--fs-hero);
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin-bottom: 30px;
}
.hero__sub {
  max-width: 600px;
  margin: 0 auto 46px;
  font-size: 1.18rem;
  line-height: 1.9;
  color: rgba(245, 235, 216, 0.92);
}

/* ---- Backgrounds por seção ------------------------------ */
.about {
  background: var(--dark-purple);
}
.courses {
  background: var(--dusk);
}
.courses .wrap {
  max-width: var(--maxw-wide);
}
.cambridge {
  background: var(--st-george);
}
.method {
  background: var(--dark-purple-deep);
}

/* ---- CTA final ------------------------------------------ */
.cta {
  position: relative;
  text-align: center;
  padding: 150px 60px;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(187, 11, 30, 0.45), transparent 70%),
    var(--st-george);
}
.cta .wrap {
  position: relative;
  z-index: 1;
}

/* ---- Rodapé --------------------------------------------- */
.site-footer {
  background: var(--dark-purple);
  text-align: center;
  padding: 72px var(--gutter) 56px;
  border-top: 1px solid var(--border-faint);
}
.site-footer .wordmark {
  display: inline-block;
  margin-bottom: 24px;
}
.site-footer .wordmark img {
  height: 64px;
  width: auto;
}