/* ==========================================================================
   base.css · Reset, tipografia e utilitários de layout
   ========================================================================== */

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color .3s, color .3s;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
ul, ol { list-style: none; }

:focus-visible { outline: 2px solid var(--ring); outline-offset: 3px; border-radius: 4px; }

/* Títulos: peso forte e letras próximas, como nos temas shadcn */
h1, h2, h3 { font-weight: 600; line-height: 1.1; letter-spacing: -0.035em; text-wrap: balance; }
h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.15rem; letter-spacing: -0.02em; }
p  { text-wrap: pretty; }

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

.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head p { color: var(--muted-foreground); font-size: 1.1rem; margin-top: 14px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent-text);
  margin-bottom: 14px;
}

.text-muted { color: var(--muted-foreground); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Animação de entrada ao rolar (ativada por assets/js/reveal.js) */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.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: none !important; }
}