*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}body.light{background-color:#f5f9ff;color:#111}body.dark{background-color:#121212;color:#f5f5f5}.app-wrapper{max-width:480px;margin:2rem auto;padding:1.5rem;border-radius:12px;box-shadow:0 8px 24px #0000001a;background-color:inherit;transition:background-color .3s ease,color .3s ease;position:relative}.theme-toggle{position:absolute;top:1rem;right:1rem;background:none;border:2px solid currentColor;padding:.4rem .8rem;border-radius:6px;font-weight:600;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background-color .3s ease}.title{text-align:center;font-size:2rem;margin-bottom:2rem;font-weight:700}.converter-card{display:flex;flex-direction:column;gap:1rem}.input-field,.select-field{padding:.75rem 1rem;font-size:1.1rem;border:1.8px solid #ccc;border-radius:8px;outline-offset:2px;transition:border-color .3s ease;background-color:#fff;color:#111;-webkit-appearance:none;-moz-appearance:none;appearance:none}body.dark .input-field,body.dark .select-field{background-color:#222;color:#f5f5f5;border-color:#555}.input-field:focus,.select-field:focus{border-color:#007bff}.result{margin-top:1rem;font-size:1.3rem;font-weight:600;text-align:center;color:inherit}.message{background-color:#007bff;color:#fff;padding:.8rem 1rem;border-radius:8px;margin-bottom:1.5rem;font-weight:600;text-align:center;animation:fadeinout 2.5s forwards}@keyframes fadeinout{0%{opacity:0}10%{opacity:1}90%{opacity:1}to{opacity:0}}@media (max-width: 520px){.app-wrapper{margin:1rem;padding:1rem}.title{font-size:1.6rem}.input-field,.select-field{font-size:1rem}}.app-wrapper{max-width:480px;margin:2rem auto;padding:2.5rem 1.5rem 1.5rem;border-radius:12px;box-shadow:0 8px 24px #0000001a;background-color:inherit;transition:background-color .3s ease,color .3s ease;position:relative}.title{text-align:center;font-size:2rem;margin-bottom:2rem;font-weight:700;margin-right:3rem}.theme-toggle{position:absolute;top:1rem;right:1rem;background:none;border:2px solid currentColor;padding:.4rem .8rem;border-radius:6px;font-weight:600;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background-color .3s ease;z-index:10}.theme-toggle:hover{background-color:#0000001a}