/* base.css — reset, tipografia, layout de página e utilitários */

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

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

h1 { font-size: var(--text-hero); font-weight: 700; }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-lg); }

p {
  color: var(--color-text-muted);
  text-wrap: pretty;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

::selection {
  background: var(--grad-blue);
  color: var(--color-text);
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.section {
  padding-block: var(--space-9);
}

.section--tight {
  padding-block: var(--space-8);
}

.section-head {
  max-width: 720px;
  margin-bottom: var(--space-7);
}

.section-head p {
  font-size: var(--text-lg);
  margin-top: var(--space-3);
}

/* Utilitários */
.gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.muted { color: var(--color-text-muted); }
.center { text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grad-cyan);
  margin-bottom: var(--space-4);
}

.eyebrow::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: var(--radius-pill);
}

/* Skip-link (acessibilidade) */
.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--grad-cyan);
  border-radius: var(--radius-sm);
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: var(--space-2);
}

/* Reveal on scroll (JS adiciona .is-visible) */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}