:root{--ink:#17212f;--muted:#687586;--line:#e2e8f0;--surface:#fff;--page:#f4f7fb;--blue:#2563eb;--blue-deep:#1d4ed8;--green:#16a34a;--green-deep:#15803d;--danger:#dc2626;--radius:18px;--shadow:0 16px 44px rgba(15,23,42,.1)}
*{box-sizing:border-box}body{min-height:100vh;margin:0;background:radial-gradient(circle at top right,#dbeafe 0,transparent 29rem),var(--page);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;font-size:16px;line-height:1.45}main{width:min(100%,620px);min-height:100vh;margin:0 auto;padding:28px 20px 80px}h1{margin:0 0 8px;font-size:clamp(28px,6vw,38px);line-height:1.08;letter-spacing:-.04em}h1+p{margin:0 0 24px;color:var(--muted);font-size:16px}.action{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:120px;margin:14px 0;padding:28px;border:0;border-radius:var(--radius);box-shadow:var(--shadow);color:#fff;font:800 clamp(22px,5vw,30px)/1.15 inherit;letter-spacing:-.03em;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease}.action:hover{transform:translateY(-3px);box-shadow:0 22px 46px rgba(15,23,42,.17)}.action:active{transform:translateY(0) scale(.985)}.buy{background:linear-gradient(135deg,var(--blue),#4f8cff)}.sell{background:linear-gradient(135deg,var(--green),#3ac46c)}.back{display:inline-flex;align-items:center;gap:5px;margin-bottom:24px;padding:0;border:0;background:transparent;color:var(--blue);font:700 15px inherit;cursor:pointer}.qrs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0 26px;padding:12px;border:1px solid var(--line);border-radius:var(--radius);background:rgba(255,255,255,.8);box-shadow:0 8px 24px rgba(15,23,42,.05)}.qrs img{display:block;width:100%;border-radius:12px;background:#fff}form{display:grid;gap:13px;margin-top:20px;padding:22px;border:1px solid rgba(226,232,240,.9);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}input,textarea,select{width:100%;min-height:50px;padding:13px 14px;border:1px solid var(--line);border-radius:12px;outline:none;background:#fff;color:var(--ink);font:500 16px inherit;transition:border-color .15s ease,box-shadow .15s ease}textarea{min-height:108px;resize:vertical}input:focus,textarea:focus,select:focus{border-color:#7aa2ff;box-shadow:0 0 0 4px rgba(37,99,235,.12)}input::placeholder,textarea::placeholder{color:#94a3b8}label{color:var(--ink);font-size:14px;font-weight:750}label input{margin-top:8px}form button,.lead button{min-height:52px;padding:14px 18px;border:0;border-radius:12px;background:var(--blue);color:#fff;font:800 16px inherit;cursor:pointer;transition:background .15s ease,transform .15s ease}form button:hover,.lead button:hover{background:var(--blue-deep)}form button:active,.lead button:active{transform:scale(.985)}#result{margin-top:18px;padding:16px 18px;border:1px solid #bbf7d0;border-radius:14px;background:#f0fdf4;color:#166534;font-weight:700}.lead{margin:16px 0;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:0 8px 24px rgba(15,23,42,.06)}.lead>b{display:inline-flex;padding:6px 10px;border-radius:999px;background:#e0e7ff;color:#3730a3;font-size:13px}.lead p{margin:14px 0;color:#475569;line-height:1.65}.lead textarea{min-height:78px}.lead button{width:auto;min-height:42px;margin:10px 8px 0 0;padding:9px 13px;font-size:14px}.lead .bad{background:var(--danger)}.lead .bad:hover{background:#b91c1c}@media(max-width:440px){main{padding:22px 14px 60px}.action{min-height:104px}.qrs{gap:8px;padding:8px}form{padding:16px}}