/* ==========================================================================
   base.css — Reset, tipografia, layout e utilitários · versão 1B
   Depende de tokens.css. Carregar sempre depois dele.
   O documento é claro; as capas escuras se declaram em components.css.
   ========================================================================== */

*, *::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(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--text-base);
  font-weight: var(--w-regular);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ---- Títulos ------------------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: var(--w-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}
h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); font-weight: var(--w-semi); letter-spacing: -0.018em; line-height: 1.32; }
h4 { font-size: var(--text-md); font-weight: var(--w-semi); letter-spacing: -0.015em; }
h5 { font-size: var(--text-base); font-weight: var(--w-semi); }

p { margin: 0; text-wrap: pretty; }

/* ---- Links -------------------------------------------------------------- */
a {
  color: var(--brand);
  text-decoration: none;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}
a:hover { color: var(--brand-600); text-decoration: underline; }

/* ---- Foco --------------------------------------------------------------- */
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
::selection { background: var(--brand-tint); color: var(--ink); }

/* ---- Mídia -------------------------------------------------------------- */
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
figure { margin: 0; }
figcaption { margin-top: var(--space-3); font-size: var(--text-xs); color: var(--ink-faint); }
.grayscale img,
img.grayscale { filter: grayscale(1) contrast(1.05); }

/* ---- Listas ------------------------------------------------------------- */
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }

/* ---- Formulário --------------------------------------------------------- */
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }

/* ---- Tabela ------------------------------------------------------------- */
table { width: 100%; border-collapse: collapse; }

/* ---- Régua -------------------------------------------------------------- */
hr, .rule { height: 1px; margin: 0; border: 0; background: var(--rule); }
.rule-soft { height: 1px; background: var(--rule-soft); }

/* ==========================================================================
   Layout
   ========================================================================== */

.wrap {
  width: 100%;
  max-width: var(--w-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap-default { max-width: var(--w-default); }
.wrap-narrow  { max-width: var(--w-narrow); }

.section { padding-block: var(--section-y); }
.section-tight { padding-block: var(--space-7); }
.section-alt { background: var(--surface); }
.section-rule { border-top: 1px solid var(--rule-soft); }

.stack > * + * { margin-top: var(--space-5); }
.stack-lg > * + * { margin-top: var(--space-6); }

.grid-2 {
  display: grid;
  gap: var(--space-6) var(--space-6);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}
@media (min-width: 62rem) {
  .grid-2 { grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); }
}

/* ==========================================================================
   Painel
   ========================================================================== */

.panel {
  background: var(--panel);
  border: 1px solid var(--rule-soft);
  box-shadow: var(--shadow-card);
  padding: clamp(1.25rem, 0.8rem + 1.6vw, 2rem);
}
.panel-tint { background: var(--brand-tint-2); box-shadow: none; }
.panel-brand { background: var(--brand); color: #fff; border-color: transparent; }

/* Campo escuro reutilizável — as capas e faixas de dados. */
.on-dark { background: var(--dark); color: var(--on-dark); }
.on-dark h1, .on-dark h2, .on-dark h3 { color: var(--on-dark); }
.on-dark a { color: var(--accent); }
.on-dark a:hover { color: var(--accent-strong); }

/* ==========================================================================
   Tipografia de página
   ========================================================================== */

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--w-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--brand);
}

.section-title { font-size: var(--text-h2); }

.lead {
  max-width: 64ch;
  font-size: var(--text-lg);
  line-height: 1.62;
  color: var(--ink-muted);
}

/* Corpo de leitura — respiro largo, medida controlada. */
.prose { max-width: 70ch; }
.prose > * + * { margin-top: var(--space-5); }
.prose p {
  font-size: var(--text-md);
  line-height: var(--leading-read);
  color: #23242e;
}
.prose h2 { margin-top: var(--space-8); font-size: var(--text-h3); }
.prose h3 { margin-top: var(--space-7); font-size: var(--text-md); }
.prose a { text-decoration: underline; }
.prose strong { font-weight: var(--w-semi); color: var(--ink); }
.prose ul { display: flex; flex-direction: column; gap: var(--space-3); }
.prose ul li {
  position: relative;
  padding-left: var(--space-5);
  font-size: var(--text-md);
  line-height: var(--leading-read);
  color: #23242e;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.82em;
  width: 8px; height: 2px;
  background: var(--brand);
}

/* ==========================================================================
   Utilitários
   ========================================================================== */

.text-muted { color: var(--ink-muted); }
.text-sm { font-size: var(--text-sm); }
.mono-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--w-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100%;
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--accent);
  color: #0b0d1a;
  font-weight: var(--w-semi);
}
.skip-link:focus { top: var(--space-4); color: #0b0d1a; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---- Entrada ao rolar — aplicada pelo main.js ------------------------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1; transform: none; }
}