/* ============================================================
   BASE — reset, tipografia e utilitários
   ============================================================ */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

ul, ol { list-style: none; }

h1, h2, h3, h4 { font-family: var(--f-display); line-height: 1.1; letter-spacing: var(--ls-tight); font-weight: 400; }
h1 { font-size: var(--fs-h1); letter-spacing: var(--ls-tighter); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

em { font-style: italic; color: var(--ink-soft); }

p { max-width: 68ch; }

/* ---------- Utilitários ---------- */
.container { padding-inline: var(--container-pad); }
.section   { padding-block: var(--sp-24); }
.section-sm { padding-block: var(--sp-20); }

.mono  { font-family: var(--f-mono); }
.serif { font-family: var(--f-display); }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--f-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sp-5);
}
.section-tag::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--accent);
}

/* ---------- Reveal (intersection observer) ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ---------- Responsivo base ---------- */
@media (max-width: 768px) {
  .container  { padding-inline: var(--container-pad-mobile); }
  .section    { padding-block: 60px; }
  .section-sm { padding-block: 52px; }
  p { max-width: none; }
}