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solid #fff;border-radius:50%;animation:spin .6s linear infinite;display:none}.loading-spinner.show{display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.toast{position:fixed;bottom:5rem;right:1.5rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:.875rem 1.25rem;box-shadow:var(--shadow-xl);display:flex;align-items:center;gap:.625rem;font-size:.875rem;color:var(--text);transform:translateY(1rem);opacity:0;transition:all var(--transition);z-index:10000;max-width:320px}.toast.show{transform:translateY(0);opacity:1}.toast.success{border-color:var(--success)}.toast.error{border-color:var(--error)}.toast svg{width:16px;height:16px;flex-shrink:0}.toast.success svg{color:var(--success)}.toast.error svg{color:var(--error)}.diff-view{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}.diff-panel{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1rem;font-size:.8125rem;font-family:monospace;line-height:1.7;word-break:break-all;max-height:200px;overflow-y:auto}.diff-panel-title{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text3);margin-bottom:.5rem;font-family:'Inter',sans-serif}.stats-row{display:flex;gap:1.5rem;flex-wrap:wrap;margin-top:1rem;padding:.875rem 1.25rem;background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius-lg)}.stat-item{display:flex;flex-direction:column;gap:.125rem}.stat-item-label{font-size:.6875rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text3)}.stat-item-val{font-family:'Outfit',sans-serif;font-weight:700;font-size:1rem;color:var(--text)}.highlight-encoded{color:#2563eb}.highlight-decoded{color:#16a34a}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}@media(max-width:1024px){.footer-top{grid-template-columns:1fr 1fr}.nav-links{display:none}.hamburger{display:flex}.dropdown{display:none!important}.io-grid{grid-template-columns:1fr}}@media(max-width:768px){.hero{padding:2rem 0 1.5rem}.hero-stats{gap:1.25rem}.tool-header{flex-direction:column;align-items:flex-start}.diff-view{grid-template-columns:1fr}.footer-top{grid-template-columns:1fr 1fr}.features-grid{grid-template-columns:1fr}.steps-grid{grid-template-columns:1fr 1fr}}@media(max-width:576px){.footer-top{grid-template-columns:1fr}.footer-bottom{flex-direction:column;text-align:center}.tools-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.hero h1{font-size:1.625rem}.steps-grid{grid-template-columns:1fr}.cta-buttons{flex-direction:column}.io-grid{grid-template-columns:1fr}.stats-row{gap:1rem}.action-row{flex-wrap:wrap}}@media(max-width:400px){.mode-tabs{flex-wrap:wrap;border-radius:var(--radius)}.mode-tab{flex:1;text-align:center}}