.opafc-wrap{max-width:760px;margin:auto;padding:20px;font-family:Arial,sans-serif;color:#333}
.opafc-form,.opafc-result{background:#fff;border:1px solid #ddd;border-radius:14px;padding:20px;box-shadow:0 4px 15px rgba(0,0,0,.06)}
.opafc-field{margin-bottom:16px}.opafc-field label{display:block;font-weight:600;margin-bottom:6px}
.opafc-field input{width:100%;padding:12px;border:1px solid #bbb;border-radius:8px;box-sizing:border-box}
.opafc-buttons{display:flex;flex-wrap:wrap;gap:10px}.opafc-buttons button{padding:12px 16px;border:0;border-radius:8px;cursor:pointer}
.opafc-result{margin-top:20px;display:none}.opafc-result h3{margin-top:0}
.opafc-row{display:flex;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid #eee;overflow-wrap:anywhere}
.opafc-theme{float:right}
.opafc-dark{background:#222;color:#eee}.opafc-dark .opafc-form,.opafc-dark .opafc-result{background:#333;color:#eee}
@media(max-width:600px){.opafc-wrap{padding:12px}.opafc-buttons button{width:100%}.opafc-row{display:block}}