:root{--bg:#0f0f12;--surface:#1a1a1f;--border:#2d2d35;--text:#e8e8ec;--text-muted:#8c8c9a;--accent:#6366f1;--accent-hover:#818cf8;--success:#22c55e;--error:#ef4444;--radius:12px;--shadow:0 4px 24px rgba(0,0,0,.4)}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:10;background:rgba(15,15,18,.8);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.site-header__inner{max-width:880px;margin:0 auto;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.site-title{font-weight:700;letter-spacing:.01em;font-size:.95rem;color:var(--text)}.site-link{color:var(--text-muted);font-size:.85rem;text-decoration:none;border:1px solid var(--border);padding:8px 10px;border-radius:999px;background:rgba(26,26,31,.6);transition:border-color .15s,color .15s}.site-link:hover{color:var(--text);border-color:var(--accent)}.site-footer{max-width:880px;margin:0 auto;padding:16px;display:flex;justify-content:center}.container{max-width:480px;margin:0 auto;padding:24px 16px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}h1{font-size:1.5rem;font-weight:600;margin:0 0 8px}.subtitle{font-size:.9rem;margin:0 0 24px}.label,.subtitle{color:var(--text-muted)}.label{display:block;font-size:.85rem;font-weight:500;margin-bottom:6px}.input{width:100%;padding:12px 14px;font-size:1rem;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;margin-bottom:16px;transition:border-color .15s}.input:focus{outline:none;border-color:var(--accent)}.input::placeholder{color:var(--text-muted);opacity:.8}.input.error{border-color:var(--error)}.btn{display:inline-flex;align-items:center;justify-content:center;width:100%;padding:14px 20px;font-size:1rem;font-weight:600;color:#fff;background:var(--accent);border:none;border-radius:8px;cursor:pointer;transition:background .15s}.btn:hover:not(:disabled){background:var(--accent-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}.btn.secondary{background:var(--border);color:var(--text)}.btn.secondary:hover:not(:disabled){background:#3d3d48}.radio-group{margin-bottom:20px}.radio-option{display:flex;align-items:flex-start;gap:12px;padding:14px;margin-bottom:10px;background:var(--bg);border:1px solid var(--border);border-radius:8px;cursor:pointer;transition:border-color .15s}.radio-option.selected,.radio-option:hover{border-color:var(--accent)}.radio-option.selected{box-shadow:0 0 0 1px var(--accent)}.radio-option input{margin-top:3px;accent-color:var(--accent)}.radio-option .content{flex:1 1}.radio-option .title{font-weight:600;margin-bottom:2px}.radio-option .detail{font-size:.85rem;color:var(--text-muted)}.message{padding:14px;border-radius:8px;margin-bottom:16px;font-size:.9rem}.message.error{background:rgba(239,68,68,.15);border:1px solid rgba(239,68,68,.4);color:#fca5a5}.message.success{background:rgba(34,197,94,.15);border:1px solid rgba(34,197,94,.4);color:#86efac}.message.info{background:rgba(99,102,241,.15);border:1px solid rgba(99,102,241,.4);color:#a5b4fc}.prize-summary{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:16px;margin-bottom:24px}.prize-summary .row{display:flex;justify-content:space-between;padding:6px 0;font-size:.9rem}.prize-summary .row .key{color:var(--text-muted)}.prize-summary .row .value{font-weight:500}.prize-image-wrap{text-align:center;margin:0 0 24px;padding:20px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius)}.prize-image{display:block;width:100%;max-width:100%;max-height:340px;height:auto;object-fit:contain;border-radius:8px;margin:0 auto}.step-badge{display:inline-block;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--accent);margin-bottom:16px}.already-done{text-align:center;padding:32px 0}.already-done .icon{font-size:2.5rem;margin-bottom:12px}.spinner{width:20px;height:20px;border:2px solid hsla(0,0%,100%,.3);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}@media (max-width:400px){.card{padding:20px}}