:root{--ink:#1a1f36;--muted:#697386;--line:#e6e9ef;--field:#fff;--bg:#f6f9fc;--brand:#0a0c11;--accent:#635bff;--yellow:#f4c000;--ok:#1a7f54;--err:#df1b41;--radius:10px}*{box-sizing:border-box}body,html{margin:0;height:100%}body{background:var(--bg);color:var(--ink);font:15px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}.shell{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}@media(max-width:860px){.shell{grid-template-columns:1fr}}.summary{background:var(--brand);color:#e9ebf0;padding:56px clamp(24px,6vw,72px);display:flex;flex-direction:column}.back{display:inline-flex;align-items:center;gap:8px;color:#aab2c5;font-size:13px;text-decoration:none;margin-bottom:42px}.merchant{font-size:14px;color:#aab2c5;font-weight:500}.amount{font-size:40px;font-weight:680;letter-spacing:-.02em;margin:6px 0 30px;color:#fff}.amount .cur{font-size:20px;color:#aab2c5;font-weight:600;margin-right:6px;vertical-align:6px}.line{display:flex;justify-content:space-between;align-items:flex-start;padding:16px 0;border-top:1px solid #232838}.line .t{font-weight:600}.line .d{color:#9aa3b8;font-size:13px;margin-top:2px}.line .v{font-weight:600;white-space:nowrap}.total{display:flex;justify-content:space-between;padding:16px 0;border-top:1px solid #232838;font-weight:700;font-size:16px}.foot{margin-top:auto;padding-top:40px;color:#7b8499;font-size:12px}.foot b{color:#cfd5e3}.pay{background:#fff;padding:56px clamp(24px,6vw,72px);display:flex;align-items:flex-start}.form{width:100%;max-width:420px;margin:auto}.form h2{font-size:18px;margin:0 0 22px}label{display:block;font-size:13px;font-weight:550;margin:16px 0 6px}.inp,label{color:var(--ink)}.inp{width:100%;height:44px;padding:0 13px;border:1px solid var(--line);border-radius:var(--radius);background:var(--field);font-size:15px;transition:border .15s,box-shadow .15s;outline:none}.inp:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,91,255,.16)}.inp.bad{border-color:var(--err);box-shadow:0 0 0 3px rgba(223,27,65,.12)}.card-group{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.card-group:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(99,91,255,.16)}.card-group .inp{border:0;border-radius:0;box-shadow:none}.card-num{position:relative}.brand{position:absolute;right:12px;top:11px;height:22px;display:none;align-items:center;font-weight:800;font-size:11px;letter-spacing:.04em;color:#fff;padding:0 7px;border-radius:5px;background:#8792a2}.brand.show{display:flex}.brand[data-b=visa]{background:#1434cb}.brand[data-b=mastercard]{background:#eb001b}.brand[data-b=amex]{background:#2e77bb}.split{display:flex}.split .inp{border-top:1px solid var(--line)}.split>div{flex:1 1}.split>div+div .inp{border-left:1px solid var(--line)}.err{color:var(--err);font-size:12.5px;margin-top:6px;min-height:1px}.btn{width:100%;height:46px;margin-top:26px;border:0;border-radius:var(--radius);background:var(--yellow);color:#1a1f36;font-weight:700;font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;transition:filter .15s}.btn:hover{filter:brightness(.96)}.btn:disabled{opacity:.6;cursor:default}.spin{width:16px;height:16px;border:2px solid rgba(26,31,54,.3);border-top-color:#1a1f36;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.lock{display:flex;align-items:center;justify-content:center;gap:6px;color:var(--muted);font-size:12px;margin-top:16px}.result{margin-top:18px;padding:13px 14px;border-radius:var(--radius);font-size:13.5px}.result.ok{background:#ecfdf3;color:var(--ok);border:1px solid #b7f0cf}.result.no{background:#fef1f3;color:var(--err);border:1px solid #f7c4ce}.cfg{position:fixed;top:10px;right:10px;font-size:11px;color:var(--muted);z-index:5}.cfg input{border:1px solid var(--line);border-radius:6px;padding:3px 6px;font-size:11px}