.app-header{background:#fff;border-bottom:1px solid #e2e8f0;justify-content:space-between;align-items:center;gap:24px;min-height:64px;padding:0 32px;display:flex}.app-brand{font-size:18px;font-weight:700}.app-nav{align-items:center;gap:8px;display:flex}.app-nav a{color:#475569;border-radius:6px;padding:8px 12px;font-size:14px;font-weight:600}.app-nav a:hover,.app-nav a.active{color:#0f172a;background:#e2e8f0}@media (width<=640px){.app-header{flex-direction:column;align-items:flex-start;padding:16px}.app-nav{flex-wrap:wrap;width:100%}}*{box-sizing:border-box}body{color:#1e293b;background:#f8fafc;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh}.app-main{width:min(100% - 32px,960px);margin:0 auto;padding:48px 0}.home-page{gap:28px;display:grid}.home-page h1,.home-page h2,.home-page h3,.home-page p{margin:0}.home-page header{gap:8px;display:grid}.home-stt-test{background:#fff;border:1px solid #e2e8f0;border-radius:8px;gap:18px;padding:24px;display:grid}.home-stt-test>div:first-child{gap:6px;display:grid}.home-stt-test>div:first-child p{color:#64748b;text-transform:uppercase;font-size:13px;font-weight:800}.home-stt-test dl{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0;display:grid}.home-stt-test dl div{background:#f8fafc;border-radius:6px;padding:12px}.home-stt-test dt{color:#64748b;font-size:12px;font-weight:800}.home-stt-test dd{color:#0f172a;margin:4px 0 0;font-weight:800}.home-stt-test label{color:#334155;gap:8px;font-size:13px;font-weight:800;display:grid}.home-stt-test select{color:#0f172a;width:100%;font:inherit;border:1px solid #cbd5e1;border-radius:6px;padding:10px 12px}.home-stt-options,.home-stt-actions{flex-wrap:wrap;gap:10px;display:flex}.home-stt-options label{align-items:center;gap:8px;display:flex}.home-stt-actions button{color:#fff;font:inherit;cursor:pointer;background:#2563eb;border:0;border-radius:6px;padding:10px 14px;font-weight:800}.home-stt-actions button:disabled{cursor:not-allowed;opacity:.55}.home-stt-error{color:#b91c1c;font-weight:700}.home-stt-result{background:#f8fafc;border-radius:6px;gap:8px;padding:14px;display:grid}.home-stt-result h3{color:#0f172a;font-size:15px}.home-stt-result p{color:#475569;line-height:1.6}@media (width<=640px){.home-stt-test{padding:18px}.home-stt-test dl{grid-template-columns:1fr}}