@layer layout;
@layer layout {
  .container { width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; }
  .section { padding-block: var(--sec); position: relative; }
  .section__head { display: grid; gap: 1rem; max-width: 60ch; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); }
  .section__head h2 { font-size: var(--t-xl); font-weight: 600; }
  .section__head p { color: var(--c-fg-2); font-size: var(--t-m); max-width: 56ch; text-wrap: pretty; }

  /* cadres de visée entre sections */
  .frame { position: relative; }
  .frame::before, .frame::after { content: ""; position: absolute; top: 0; width: 22px; height: 22px; border: 1px solid var(--c-fg-3); }
  .frame::before { left: var(--gutter); border-right: 0; border-bottom: 0; }
  .frame::after { right: var(--gutter); border-left: 0; border-bottom: 0; }
  .frame > .frame-b::before, .frame > .frame-b::after { content: ""; position: absolute; bottom: 0; width: 22px; height: 22px; border: 1px solid var(--c-fg-3); }
  .frame > .frame-b::before { left: var(--gutter); border-right: 0; border-top: 0; }
  .frame > .frame-b::after { right: var(--gutter); border-left: 0; border-top: 0; }

  .grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
  .grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem; }
  @media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
  @media (max-width: 680px) { .grid-2, .grid-4 { grid-template-columns: 1fr; } }
}