/*
  BASE — Site Ilha Sites
  Reset mínimo, tipografia global, grid e container.
  Escrito mobile-first: regra base vale a partir de 360px; breakpoints
  em min-width ampliam (design.md 3.2).
*/

/* Reset mínimo */
*, *::before, *::after { box-sizing: border-box; }
html, body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; margin: 0; }
img, picture { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--line-height-body);
  min-width: 360px;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  line-height: var(--line-height-heading);
  font-weight: 700;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

small, .text-small { font-size: var(--fs-small); }

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

/* Título "prata metálico" — cai para cor chapada sem suporte */
.title-silver {
  color: var(--color-silver);
  background: var(--color-silver-grad);
  -webkit-background-clip: text;
  background-clip: text;
}
@supports not (background-clip: text) {
  .title-silver { color: var(--color-silver); background: none; }
}

/* Foco visível — obrigatório em todo elemento interativo (design.md 6.6) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Container e medida de leitura — design.md 3.3 */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.measure {
  max-width: var(--measure);
  margin-inline: auto;
}

/* Grid de 12 colunas — só a partir de md (design.md 3.4) */
.grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 480px) {
  .grid--sm-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid { gap: var(--space-6); }
  .grid--md-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--lg-3 { grid-template-columns: repeat(3, 1fr); }
  .grid--lg-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Ritmo vertical de seção — design.md 3.5 */
.section {
  padding-block: var(--space-7);
}
@media (min-width: 768px) {
  .section { padding-block: var(--space-8); }
}
@media (min-width: 1024px) {
  .section { padding-block: var(--space-9); }
}
.section--tight { padding-block: var(--space-6); }

.kicker {
  display: block;
  font-size: var(--fs-kicker);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-heading {
  margin-bottom: var(--space-6);
}
.section-heading p {
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 60ch;
}

/* Skip link — acessibilidade / navegação por teclado */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-surface);
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

/* Imagem de fundo com "recorte" via CSS — evita precisar cortar o
   arquivo fonte; cover + position mantêm o enquadramento em qualquer
   tela (ver README sobre o placeholder do hero). */
.bg-cover {
  background-size: cover;
  background-position: center;
}