/* =============================================================
   NUTRALABFY — Reset, tipografia base e utilitários
   ============================================================= */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  font-family: var(--font-sans);
  font-size: var(--fz-400);
  font-weight: 400;
  line-height: var(--leading-body);
  color: var(--text);
  background: var(--ground);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; padding: 0; }

/* Regras de componente com display:flex/grid vencem o [hidden] do navegador.
   Sem isto, esconder um cartão ou seção via JS não surte efeito. */
[hidden] { display: none !important; }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }

/* ---------- Títulos -------------------------------------------
   Peso leve e entrelinha curta: a assinatura tipográfica do site. */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-tight);
  color: var(--text-strong);
  text-wrap: balance;
}

.display {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  color: var(--text-strong);
  text-wrap: balance;
}
.display--xl { font-size: var(--display-xl); }
.display--lg { font-size: var(--display-lg); }
.display--md { font-size: var(--display-md); }
.display--sm { font-size: var(--display-sm); letter-spacing: var(--tracking-tight); }

.display em { font-style: normal; color: var(--green-700); }
.on-deep, .on-deep .display, .on-deep h2, .on-deep h3 { color: var(--on-deep); }
.on-deep .display em { color: var(--green-300); }

p { text-wrap: pretty; }

.lead {
  font-size: var(--fz-450);
  line-height: 1.45;
  color: var(--text-muted);
  max-width: var(--measure);
}
.on-deep .lead { color: var(--on-deep-mute); }

/* ---------- Rótulo mono (assinatura da referência) ------------- */
.label {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-mono);
  font-size: var(--fz-300);
  font-weight: 400;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--green-700);
}
.label::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}
.label--on-deep { color: var(--green-300); }
.label--plain::before { display: none; }

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

.section { padding-block: var(--section-y); }
.section--foam   { background: var(--foam); }
.section--white  { background: var(--ground-pure); }
.section--deep   { background: var(--deep); }

/* Blocos que sobem por cima do anterior, com o topo arredondado —
   é isso que dá o encaixe em camadas do site de referência. */
.section--overlap {
  position: relative;
  z-index: 2;
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  margin-top: clamp(-72px, -5vw, -32px);
}

.head { max-width: var(--measure); }
.head > * + * { margin-top: var(--sp-16); }
.head--center { margin-inline: auto; text-align: center; }
.head--center .lead { margin-inline: auto; }
.head--center .label { justify-content: center; }

.stack > * + * { margin-top: var(--sp-16); }

/* ---------- Acessibilidade ------------------------------------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: var(--sp-16); top: var(--sp-16);
  z-index: 999;
  padding: 0.7rem 1.1rem;
  border-radius: var(--r-sm);
  background: var(--deep);
  color: #fff;
  font-weight: 500;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus-visible { transform: translateY(0); }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}
.on-deep :focus-visible, .hero :focus-visible { outline-color: var(--green-300); }

/* ---------- Revelação ao rolar ---------------------------------
   Sem JS, tudo permanece visível. */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}