.closure-demo { scroll-margin-top: 24px; padding-top: 72px; }
.closure-demo__intro h2 { max-width: 27ch; font-size: clamp(34px, 3.2vw, 48px); }
.closure-demo__intro { max-width: 790px; margin-bottom: 36px; }
.closure-demo__intro .section-copy { max-width: 720px; }
.closure-demo__grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.closure-demo__media { margin: 0; min-width: 0; }
.closure-demo__media video { display: block; width: 100%; height: auto; aspect-ratio: 8 / 9; background: #e3e9df; border: 1px solid #cbd4c7; }
.closure-demo__media figcaption { margin-top: 14px; color: #52604e; font-size: .875rem; line-height: 1.6; }
.closure-demo__result { padding-top: 12px; min-width: 0; }
.closure-demo__result h3 { font-size: clamp(1.5rem, 2.1vw, 2rem); line-height: 1.2; margin: 0 0 26px; max-width: 390px; }
.closure-demo__steps { list-style: none; padding: 0; margin: 0; counter-reset: closure-step; }
.closure-demo__steps li { counter-increment: closure-step; position: relative; padding: 19px 0 19px 44px; border-top: 1px solid #cbd4c7; }
.closure-demo__steps li::before { content: '0' counter(closure-step); position: absolute; left: 0; top: 20px; font-size: .8rem; color: #52604e; }
.closure-demo__steps strong { display: block; color: #26372c; font-size: 1rem; }
.closure-demo__steps p, .closure-demo__review p, .closure-demo__summary p { color: #4b554c; font-size: .96rem; line-height: 1.65; margin: 7px 0 0; }
.closure-demo__review { background: #e4eadf; border-left: 3px solid #536d4c; padding: 20px 22px; margin-top: 9px; }
.closure-demo__review strong { color: #26372c; line-height: 1.5; }
.closure-demo__summary { margin-top: 22px; }
.closure-demo__summary summary { cursor: pointer; font-size: .9rem; color: #30482f; line-height: 1.5; }
.closure-demo__summary summary:focus-visible, .closure-demo video:focus-visible { outline: 2px solid #30482f; outline-offset: 5px; }
@media (max-width: 760px) {
  .closure-demo__grid { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .closure-demo__intro { margin-bottom: 26px; }
  .closure-demo__media { width: 100%; max-width: 560px; margin-inline: auto; }
  .closure-demo__result { padding-top: 0; }
  .closure-demo__result h3 { max-width: none; }
}