:root{--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-primary-light:#eff6ff;--color-success:#16a34a;--color-success-hover:#15803d;--color-success-light:#f0fdf4;--color-danger:#dc2626;--color-danger-hover:#b91c1c;--color-danger-light:#fef2f2;--color-warning:#b45309;--color-warning-light:#fffbeb;--color-warning-border:#fde68a;--color-text:#111827;--color-text-secondary:#6b7280;--color-text-muted:#9ca3af;--color-border:#e5e7eb;--color-card-bg:#fff;--radius-lg:16px;--radius-md:10px;--radius-sm:8px;--shadow-card:0 1px 3px #0f172a0a, 0 16px 40px -12px #0f172a29;--shadow-card-sm:0 1px 2px #0f172a0a, 0 6px 16px -6px #0f172a1a}*{box-sizing:border-box}html,body,#root{height:100%}body{color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(#f8fafc 0%,#eef2f7 100%);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe 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.15s}.input:focus{border-color:var(--color-primary);outline:none;box-shadow:0 0 0 3px #2563eb24}.input::placeholder{color:var(--color-text-muted)}.input:disabled{color:var(--color-text-muted);background:#f9fafb}select.input{appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%236b7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-position:right 14px center;background-repeat:no-repeat;padding-right:36px}.input-code{text-align:center;letter-spacing:10px;font-family:SFMono-Regular,Menlo,Consolas,monospace;font-size:24px;font-weight:700}.error-text{color:var(--color-danger);text-align:center;background:var(--color-danger-light);border-radius:var(--radius-sm);padding:9px 12px;font-size:13px}.hint-text{color:var(--color-text-secondary);text-align:center;font-size:13px}.btn{border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;border:none;justify-content:center;align-items:center;gap:6px;padding:10px 22px;font-family:inherit;font-size:14px;font-weight:600;line-height:1.2;transition:background-color .15s,border-color .15s,box-shadow .15s,transform 80ms;display:inline-flex}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-block{width:100%}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-success{background:var(--color-success);color:#fff}.btn-success:hover:not(:disabled){background:var(--color-success-hover)}.btn-secondary{color:var(--color-text);border:1.5px solid var(--color-border);background:#f3f4f6}.btn-secondary:hover:not(:disabled){background:#e5e7eb}.btn-danger{background:var(--color-danger);color:#fff}.btn-danger:hover:not(:disabled){background:var(--color-danger-hover)}.btn-warning-outline{background:var(--color-warning-light);color:var(--color-warning);border:1.5px dashed var(--color-warning-border)}.btn-warning-outline:hover:not(:disabled){border-color:var(--color-warning);background:#fef3c7}.btn-link{color:var(--color-primary);cursor:pointer;text-underline-offset:2px;background:0 0;border:none;padding:4px;font-family:inherit;font-size:13px;font-weight:600;text-decoration:underline}.btn-link:hover{color:var(--color-primary-hover)}.button-row{justify-content:space-between;gap:12px;margin-top:4px;display:flex}.divider-text{color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.5px;align-items:center;gap:12px;margin:20px 0;font-size:12px;display:flex}.divider-text:before,.divider-text:after{content:"";background:var(--color-border);flex:1;height:1px}.warning-box{color:var(--color-warning);background:var(--color-warning-light);border:1px solid var(--color-warning-border);border-radius:var(--radius-sm);padding:10px 12px;font-size:13px;line-height:1.5}.side-panel{background:var(--color-card-bg);border-radius:var(--radius-md);box-shadow:var(--shadow-card-sm);padding:18px}.challenge-box{text-align:center;background:var(--color-success-light);border-radius:var(--radius-md);border:1.5px solid #bbf7d0;margin-bottom:16px;padding:16px 8px}.challenge-label{color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:1px;margin-bottom:6px;font-size:11px;font-weight:700}.challenge-text{color:var(--color-success);letter-spacing:2px;word-break:break-all;font-family:SFMono-Regular,Menlo,Consolas,monospace;font-size:30px;font-weight:700}.instructions-list{text-align:left;color:var(--color-text);margin-top:16px;font-size:14px;line-height:1.6}.instructions-list p{margin:6px 0}.corner-btn{z-index:20;box-shadow:var(--shadow-card-sm);position:fixed;bottom:24px;right:24px}.corner-panel{z-index:20;width:260px;position:fixed;bottom:24px;right:24px}.flow-heading{text-align:center;color:var(--color-text);margin:0 0 16px;font-size:22px;font-weight:700}.flow-heading--success{color:var(--color-success)}.status-line{text-align:center;margin-bottom:8px;font-size:14px}.status-line--info{color:var(--color-primary)}.status-line--success{color:var(--color-success)}.status-line--muted{color:var(--color-text-secondary)}.status-line--error{color:var(--color-danger)}.rating-dot{border:1.5px solid var(--color-border);cursor:pointer;border-radius:50%;width:30px;height:30px;font-family:inherit;font-size:13px;font-weight:600;transition:background-color .15s,border-color .15s,transform 80ms}.rating-dot:hover{border-color:var(--color-primary)}.rating-dot:active{transform:scale(.92)}