/* ============================================================================
   NextLayer — Base: reset, tipografia, elementos
   ========================================================================== */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

h1, h2, h3, h4, h5 {
  line-height: var(--leading-tight);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.014em;
  color: var(--text);
}
h1 { font-size: var(--text-2xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }
h4 { font-size: var(--text-md); }

p { line-height: var(--leading-normal); }

a { color: inherit; text-decoration: none; }

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button { cursor: pointer; background: none; border: none; }

ul, ol { padding-left: 1.25em; }

code, pre, .mono { font-family: var(--font-mono); }

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

/* Tamanho base dos ícones SVG (contextos específicos sobrescrevem) */
.icon { width: 18px; height: 18px; flex: none; }
.caret { width: 14px; height: 14px; flex: none; opacity: 0.6; }

hr { border: none; border-top: 1px solid var(--border); }

::selection { background: var(--brand-soft); }

/* Foco acessível, visível por teclado (WCAG) */
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
:focus:not(:focus-visible) { outline: none; }

/* Scrollbar discreta */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 999px;
  border: 3px solid transparent;
  background-clip: padding-box;
}
*::-webkit-scrollbar-thumb:hover { background: var(--text-faint); background-clip: padding-box; }

/* Utilitários */
.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }
.mono { font-family: var(--font-mono); }
.tnum { font-variant-numeric: tabular-nums; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}