:root {
  --bg-main: #fff; --bg-subtle: #f5f5f3; --text-main: #191919;
  --text-muted: #666; --text-faint: #929292; --border: #deded9;
  --accent: #16a34a; --danger: #b42318;
  --font-sans: "Geist", system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; color: var(--text-main); background: var(--bg-subtle); font-family: var(--font-sans); }
.captcha-shell { min-height: 100vh; display: grid; place-items: center; padding: 28px 18px; background: radial-gradient(circle at 50% 15%, #fff 0, transparent 48%); }
.captcha-card { position: relative; width: min(100%, 420px); padding: 34px 28px 27px; text-align: center; background: var(--bg-main); border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 14px 46px rgba(0,0,0,.12); }
.captcha-badge { position: absolute; top: -15px; right: -11px; display: grid; place-items: center; width: 58px; height: 58px; border-radius: 50%; color: #fff; background: var(--text-main); font: 700 13px var(--font-mono); transform: rotate(8deg); box-shadow: 0 0 0 4px #fff; }
.captcha-fox { display: block; width: 132px; height: auto; margin: 0 auto 4px; }
.captcha-wordmark { margin-bottom: 18px; font: 700 18px var(--font-mono); }
.captcha-wordmark span { color: var(--accent); }
h1 { margin: 0 0 8px; font-size: 23px; line-height: 1.2; }
p { margin: 0 0 22px; color: var(--text-muted); font-size: 14px; line-height: 1.55; }
.captcha-error { margin: -8px 0 16px; padding: 9px 11px; color: var(--danger); background: #fff1f0; border-radius: 7px; font-weight: 600; }
label { display: block; margin-bottom: 9px; font-size: 15px; }
label strong { font: 700 18px var(--font-mono); }
.captcha-answer { display: flex; gap: 9px; }
input { min-width: 0; width: 105px; padding: 11px 12px; color: var(--text-main); background: #fff; border: 1px solid #bdbdb8; border-radius: 8px; font: 700 18px var(--font-mono); text-align: center; }
input:focus { outline: 3px solid rgba(22,163,74,.16); border-color: var(--accent); }
button { flex: 1; padding: 11px 14px; border: 1px solid var(--accent); border-radius: 8px; color: #fff; background: var(--accent); font: 600 14px var(--font-sans); cursor: pointer; }
button:hover { filter: brightness(.93); }
.captcha-fine { margin: 16px 0 0; color: var(--text-faint); font-size: 11.5px; }
@media (max-width: 390px) { .captcha-card { padding-inline: 20px; } .captcha-answer { flex-direction: column; } input { width: 100%; } }
@media (prefers-reduced-motion: no-preference) { .captcha-card { animation: appear .35s cubic-bezier(.2,.8,.2,1); } .captcha-fox { animation: fox .55s .1s both; } }
@keyframes appear { from { opacity: 0; transform: translateY(10px) scale(.98); } }
@keyframes fox { from { opacity: 0; transform: translateY(12px) rotate(-3deg); } }