/* ==========================================================================
   AXIOMA : base.css
   Reset enxuto, tipografia, primitivos de layout e utilitarios.
   ========================================================================== */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}
body {
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
img, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
a { color: var(--link); text-decoration: none; }
ul { list-style: none; padding: 0; }

/* Foco visivel (acessibilidade / teclado) */
:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 3px;
  border-radius: 3px;
}

/* Skip-link */
.skip-link {
  position: absolute; left: 1rem; top: -3rem;
  background: var(--btn-bg); color: var(--btn-fg);
  padding: .6rem 1rem; border-radius: var(--radius-sm);
  z-index: 200; transition: top var(--dur-fast) var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ---------- Tipografia ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink-strong);
  line-height: var(--lh-tight);
  font-weight: 700;
  letter-spacing: -.02em;
  text-wrap: balance;
}
h2 { font-size: var(--fs-h2); letter-spacing: -.025em; }
h3 { font-size: var(--fs-h3); font-weight: 600; letter-spacing: -.015em; }
p  { text-wrap: pretty; }
strong { font-weight: 600; color: var(--ink-strong); }

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

section[id] { scroll-margin-top: var(--header-h); }
.section { padding-block: var(--section-y); position: relative; }
.section--alt { background: var(--bg-2); }

/* ---------- Eyebrow (rotulo de secao com acento gradiente) ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 30px; height: 2px;
  background: var(--grad);
  border-radius: 2px;
}

/* ---------- Botoes ---------- */
.btn {
  --_pad-y: .9rem;
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: var(--_pad-y) 1.6rem;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: .01em;
  border-radius: var(--radius-sm);
  position: relative;
  isolation: isolate;
  overflow: hidden;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.btn:active { transform: translateY(1px); }

/* Primario: fundo solido + varredura do gradiente no hover */
.btn--primary { background: var(--btn-bg); color: var(--btn-fg); }
.btn--primary::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--grad);
  opacity: 0; transition: opacity var(--dur) var(--ease);
}
.btn--primary:hover { box-shadow: var(--shadow); }
.btn--primary:hover::before { opacity: 1; }

/* Secundario: contorno fino, ganha borda-gradiente no hover */
.btn--ghost {
  color: var(--ink-strong);
  border: 1px solid var(--line-strong);
  background: transparent;
}
.btn--ghost:hover { border-color: transparent; box-shadow: inset 0 0 0 1px var(--c-royal); }

/* ---------- Sublinhado-gradiente animado (links de nav e inline) ---------- */
.link-underline {
  position: relative;
  color: var(--ink-strong);
}
.link-underline::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -3px; height: 2px;
  background: var(--grad);
  transition: right var(--dur) var(--ease);
}
.link-underline:hover::after,
.link-underline:focus-visible::after { right: 0; }

/* ---------- Utilitarios de revelacao no scroll (js/reveal.js) ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
}

/* Texto assinado pelo gradiente da marca (utilitario global) */
.grad-text {
  font-family: var(--font-brand);
  font-weight: 700;
  letter-spacing: -.01em;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* Acessibilidade: esconder visualmente, manter p/ leitores de tela */
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}