:root{--bg-main:#0f172a;--bg-card:#1e293b;--border-color:#334155;--text-main:#f8fafc;--text-muted:#94a3b8;--primary:#f59e0b;--hover-bg:#334155;--font-mono:'JetBrains Mono', 'Fira Code', 'Courier New', monospace}.dark-theme{font-family:'Inter',system-ui,sans-serif;color:var(--text-main);background:var(--bg-main);padding:1.5rem;border-radius:1rem;min-height:600px}.text-center{text-align:center}.text-3xl{font-size:1.875rem}.font-bold{font-weight:700}.text-muted{color:var(--text-muted)}.text-primary{color:var(--primary)}.mt-2{margin-top:.5rem}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.search-box{position:relative;max-width:600px;margin:0 auto}.search-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--text-muted);width:20px;height:20px}.form-control{width:100%;background:var(--bg-card);border:1px solid var(--border-color);color:#fff;padding:.75rem 1rem;border-radius:.5rem;font-size:1rem;outline:none;transition:all 0.2s}.form-control:focus{border-color:var(--primary)}.large-input{font-size:1.25rem;padding-left:3rem;border-radius:2rem;box-shadow:0 4px 6px -1px rgb(0 0 0 / .2)}.quick-result{max-width:600px;margin:.5rem auto 0;text-align:center;font-size:1.2rem;font-weight:600;color:var(--primary);background:var(--bg-card);padding:1rem;border-radius:.5rem;border:1px solid var(--primary)}.tabs-nav{display:flex;flex-wrap:wrap;gap:.5rem;border-bottom:2px solid var(--border-color);padding-bottom:1rem;margin-bottom:1.5rem;justify-content:center}.tab-btn{background:#fff0;border:1px solid var(--border-color);color:var(--text-muted);padding:.5rem 1rem;border-radius:2rem;cursor:pointer;font-weight:600;display:flex;align-items:center;gap:.5rem;transition:all 0.2s}.tab-btn i{width:16px;height:16px}.tab-btn:hover{background:var(--hover-bg);color:var(--text-main)}.tab-btn.active{background:var(--primary);color:#000;border-color:var(--primary)}@media (max-width:768px){.hide-mobile{display:none}.tab-btn{padding:.5rem;border-radius:50%}}.units-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width:640px){.units-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width:1024px){.units-grid{grid-template-columns:repeat(3,1fr)}}@media (min-width:1280px){.units-grid{grid-template-columns:repeat(4,1fr)}}.unit-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:.75rem;padding:1rem;display:flex;flex-direction:column;gap:.5rem;transition:border-color 0.2s}.unit-card:focus-within{border-color:var(--primary)}.unit-header{display:flex;justify-content:space-between;align-items:center}.unit-label{font-weight:600;font-size:.95rem}.unit-sym{color:var(--text-muted);font-size:.85rem}.input-with-copy{position:relative;display:flex}.input-with-copy input{padding-right:2.5rem;font-family:var(--font-mono)}.btn-copy{position:absolute;right:.25rem;top:50%;transform:translateY(-50%);background:#fff0;border:none;color:var(--text-muted);cursor:pointer;padding:.5rem;border-radius:.25rem;transition:all 0.2s}.btn-copy:hover{color:#fff;background:var(--hover-bg)}.btn-copy i{width:14px;height:14px}.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--primary);color:#000;padding:.75rem 1.5rem;border-radius:2rem;font-weight:600;opacity:0;transition:all 0.3s cubic-bezier(.68,-.55,.265,1.55);z-index:1000}.toast.show{transform:translateX(-50%) translateY(0);opacity:1}