/* ============================================================
   Base — reset enxuto, tipografia, grid editorial, utilitários
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--fg);
  font-family: var(--font-text);
  font-size: var(--t-body);
  line-height: var(--lh-text);
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: var(--track-tight);
  line-height: var(--lh-snug);
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

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

::selection { background: var(--accent); color: #fff; }

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

/* --- Seções e contêineres ---------------------------------- */

.section {
  background: var(--bg);
  color: var(--fg);
  padding-block: var(--section-y);
  position: relative;
}

.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--col-gap);
}

/* --- Marcações editoriais ---------------------------------- */

.eyebrow {
  font-size: var(--t-eyebrow);
  font-weight: 500;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0;
}

.eyebrow--accent { color: var(--accent); }

.marker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--t-micro);
  font-weight: 500;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--fg-muted);
}

.marker::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: var(--accent);
}

.index {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
}

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.lead {
  font-size: var(--t-lead);
  line-height: 1.5;
  color: var(--fg);
}

.prose p + p { margin-top: 1.15em; }
.prose { color: var(--fg-muted); max-width: 62ch; }

.accent { color: var(--accent); }

/* --- Botões ------------------------------------------------ */

.btn {
  --btn-fg: var(--ink-900);
  --btn-bg: var(--fg);
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.05rem 1.65rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-display);
  font-size: var(--t-small);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              transform 260ms var(--ease);
  will-change: transform;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn__arrow {
  width: 0.95rem;
  flex: none;
  transition: transform 320ms var(--ease-out);
}

.btn:hover .btn__arrow { transform: translateX(4px); }

/* Texto escuro sobre laranja: 5.9:1, acima do mínimo AA (o branco ficaria em 3.4:1). */
.btn--accent { --btn-bg: var(--accent); --btn-fg: var(--ink-900); }
.btn--accent:hover { --btn-bg: var(--accent-deep); --btn-fg: #FFF7F3; }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--fg);
  box-shadow: inset 0 0 0 1px var(--rule-strong);
}

.btn--ghost:hover { box-shadow: inset 0 0 0 1px var(--accent); color: var(--accent); }

.btn--wide { padding-inline: 2.4rem; }

/* Link sublinhado com revelação */
.link-line {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.25rem;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 1px;
  transition: background-size 420ms var(--ease-out), color var(--dur) var(--ease);
}

.link-line:hover { background-size: 100% 1px; color: var(--accent); }

/* --- Reveal ao scroll -------------------------------------- */

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 900ms var(--ease-out), transform 900ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal].is-visible { opacity: 1; transform: none; }

/* --- Acessibilidade ---------------------------------------- */

.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;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.7rem 1.1rem;
  background: var(--accent);
  color: #fff;
  font-size: var(--t-small);
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform 220ms var(--ease);
}

.skip-link:focus-visible { transform: none; }

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