:root{--bg-color:#0e0e0e;--panel-bg:#1a1a1a;--text-main:#fff;--text-muted:#a0a0a0;--accent-red:#d92121;--accent-red-hover:#b81c1c;--border-color:#333}body{background-color:var(--bg-color);color:var(--text-main);-webkit-font-smoothing:antialiased;margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.container{max-width:800px;margin:0 auto;padding:2rem}.header{text-align:center;border-bottom:2px solid var(--accent-red);margin-bottom:3rem;padding-bottom:1.5rem}.header h1{text-transform:uppercase;letter-spacing:2px;margin:0;font-size:2.8rem;font-weight:900}.header p{color:var(--text-muted);margin-top:.5rem;font-size:1.1rem}.card{background:var(--panel-bg);border:1px solid var(--border-color);border-radius:12px;margin-bottom:2rem;padding:2rem;box-shadow:0 10px 30px #00000080}.input-group{flex-direction:column;gap:.5rem;margin-bottom:1.5rem;display:flex}.input-group label{color:var(--text-muted);font-size:.9rem;font-weight:600}input{border:1px solid var(--border-color);color:#fff;background:#000;border-radius:8px;outline:none;padding:1.2rem;font-size:1.1rem;transition:border-color .2s}input:focus{border-color:var(--accent-red)}button{background:var(--accent-red);color:#fff;cursor:pointer;text-transform:uppercase;letter-spacing:1px;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;width:100%;padding:1.2rem 2rem;font-size:1.1rem;font-weight:700;transition:background .2s,transform .1s;display:flex}button:hover:not(:disabled){background:var(--accent-red-hover)}button:active:not(:disabled){transform:scale(.98)}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{border:2px solid var(--border-color);color:var(--text-main);background:0 0}button.secondary:hover:not(:disabled){border-color:var(--text-main)}.action-grid{grid-template-columns:1fr;gap:1rem;margin-top:2rem;display:grid}@media (width>=600px){.action-grid{grid-template-columns:1fr 1fr}}.loader{text-align:center;color:var(--text-muted);padding:2rem}.error-message{color:#f44;text-align:center;background:#ff44441a;border-radius:8px;margin-bottom:1.5rem;padding:1rem}.success-message{color:#4f4;text-align:center;background:#44ff441a;border-radius:8px;margin-bottom:1.5rem;padding:1rem}.contact-info{border-left:4px solid var(--accent-red);background:#d921210d;border-radius:0 8px 8px 0;margin-bottom:2rem;padding:1.5rem}.contact-info h2{margin:0 0 .5rem}.contact-info p{color:var(--text-muted);margin:0}.amount-input-container{gap:1rem;margin-bottom:1rem;display:flex}.amount-input-container input{flex:1}