@font-face {
  font-family: 'Newsreader';
  src: url('/fontes/newsreader.woff2') format('woff2-variations');
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: 'Archivo';
  src: url('/fontes/archivo.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}

:root {
  --noite: #17120d;
  --papel: #f6f1e6;
  --suave: #d8d0be;
  --verde: #1f5b44;
  --margem: clamp(1rem, 3vw, 2rem);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  overflow: hidden;
  background: var(--noite);
  color: var(--papel);
  font: 400 1rem/1.5 'Archivo', system-ui, sans-serif;
}
h1, p { margin: 0; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--papel); outline-offset: 3px; }

#tela { position: fixed; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; cursor: grab; }
#tela:active { cursor: grabbing; }

.topo {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: max(0.75rem, env(safe-area-inset-top)) var(--margem) 0.75rem;
  pointer-events: none;
}
.topo a {
  pointer-events: auto;
  font-family: 'Newsreader', Georgia, serif;
  font-size: 1.5rem;
  font-weight: 500;
  text-decoration: none;
  padding: 0.25rem 0;
}
.topo p { font-size: 0.875rem; color: var(--suave); }

.painel {
  position: fixed;
  left: var(--margem);
  bottom: max(var(--margem), env(safe-area-inset-bottom));
  width: min(27rem, calc(100vw - 2 * var(--margem)));
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
  background: rgb(23 18 13 / 0.86);
  border-radius: 6px;
}
.legenda { min-height: 8.5rem; }
.legenda h1 { font-family: 'Newsreader', Georgia, serif; font-weight: 500; font-size: 1.75rem; line-height: 1.15; margin-bottom: 0.4rem; }

.fases { display: grid; grid-template-columns: repeat(5, auto); gap: 0.375rem; }
.fases button { padding-inline: 0.5rem; white-space: nowrap; font-size: 0.875rem; }
button {
  min-height: 44px;
  padding: 0.5rem 0.25rem;
  border: 1px solid #6d6555;
  border-radius: 4px;
  background: transparent;
  color: var(--papel);
  font: 500 0.9375rem/1.2 'Archivo', system-ui, sans-serif;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
button:hover { border-color: var(--papel); }
.fases button[aria-current='step'] { background: var(--papel); border-color: var(--papel); color: var(--noite); }

.rodape { display: grid; grid-template-columns: auto 1fr; gap: 0.75rem; align-items: center; }
.rodape button { padding: 0.5rem 1rem; }
.rodape p { font-size: 0.8125rem; line-height: 1.35; color: var(--suave); }

.carga { position: fixed; inset: 0; display: grid; place-items: center; background: var(--noite); color: var(--suave); }
.carga[hidden] { display: none; }

.sem-webgl { display: none; position: fixed; inset: 0; overflow: auto; padding: 5rem var(--margem) var(--margem); background: var(--noite); }
.sem-webgl img { display: block; width: min(100%, 48rem); height: auto; margin-bottom: 1rem; }
.sem-3d .sem-webgl { display: block; }
.sem-3d .painel, .sem-3d #tela { display: none; }

.fases.seis { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 700px) {
  .painel { padding: 0.875rem 1rem 1rem; gap: 0.75rem; }
  .legenda { min-height: 8.25rem; }
  .fases { gap: 0.25rem; }
  .fases button { padding-inline: 0.25rem; font-size: 0.8125rem; }
  .legenda h1 { font-size: 1.5rem; }
  .rodape p { font-size: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  button { transition: none; }
}