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2rem);color:var(--diffli-surface);opacity:0;pointer-events:none;text-align:center;border-radius:8px;padding:.7rem 1rem;font-size:.8rem;transition:opacity .2s,transform .2s;position:fixed;bottom:24px;left:50%;transform:translate(-50%,25px);box-shadow:0 12px 40px #00000040}.toast.show{opacity:1;transform:translate(-50%)}.site-footer{border-top:1px solid var(--diffli-line);width:min(1280px,100% - 2rem);color:var(--diffli-muted);justify-content:space-between;gap:1rem;margin:auto auto 0;padding:1rem 0;font-size:.7rem;display:flex}.site-footer span:first-child{color:var(--diffli-ink);font-weight:800}@media (max-width:1000px){.file-panels,.compare-inputs,.side-by-side,.text-diff-grid{grid-template-columns:1fr}.mode-intro{grid-template-columns:1fr;gap:.8rem}.mode-intro h1{max-width:850px}.ss-table-wrap{max-height:500px}}@media (max-width:700px){.app-nav{grid-template-columns:auto 1fr auto;gap:.4rem;width:calc(100% - 1rem)}.brand 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