:root {
  --void: #050b14;
  --glass: rgba(10, 24, 38, 0.82);
  --line: rgba(92, 225, 255, 0.16);
  --line-strong: rgba(92, 225, 255, 0.5);
  --arc: #5ce1ff;
  --ink: #e3f6ff;
  --ink-2: #9cbdd0;
  --ink-3: #6b8ea3;
  --warn: #fab219;
  --display: "Oxanium", "Barlow Semi Condensed", system-ui, sans-serif;
  --text: "Barlow Semi Condensed", system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { background: var(--void); }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 24px 16px;
  color: var(--ink); font: 400 16px/1.5 var(--text);
  background:
    radial-gradient(circle at 50% 38%, rgba(92, 225, 255, 0.10), transparent 46%),
    linear-gradient(rgba(92, 225, 255, 0.035) 1px, transparent 1px) 0 0 / 40px 40px,
    linear-gradient(90deg, rgba(92, 225, 255, 0.035) 1px, transparent 1px) 0 0 / 40px 40px,
    var(--void);
}
.card {
  position: relative; width: 100%; max-width: 400px; padding: 36px 32px 28px; text-align: center;
  background: var(--glass); border: 1px solid var(--line);
}
.card::before, .card::after {
  content: ""; position: absolute; width: 16px; height: 16px; border-color: var(--line-strong); border-style: solid;
}
.card::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
.card::after { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }
.ring { width: 96px; height: 96px; margin: 0 auto 18px; display: block; }
.ring circle { fill: none; stroke: var(--arc); }
.ring-out { stroke-width: 2; opacity: 0.35; stroke-dasharray: 10 6; transform-origin: 60px 60px; animation: spin 24s linear infinite; }
.ring-in { stroke-width: 3; opacity: 0.8; }
.ring-core { fill: var(--arc) !important; stroke: none !important; filter: drop-shadow(0 0 10px rgba(92, 225, 255, 0.7)); }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .ring-out { animation: none; } }
h1 { margin: 0 0 6px; font: 600 24px var(--display); letter-spacing: 0.04em; }
h1 .sub { color: var(--ink-3); font: 400 20px var(--text); letter-spacing: 0; }
.lede { margin: 0 0 22px; color: var(--ink-2); }
.note { margin: 0 0 18px; padding: 9px 12px; text-align: left; font-size: 14.5px; border-left: 3px solid var(--warn); background: rgba(250, 178, 25, 0.08); }
.google {
  display: flex; align-items: center; justify-content: center; gap: 12px; width: 100%; height: 46px;
  color: #1f1f1f; background: #fff; border: 1px solid #fff; text-decoration: none; font: 500 16px var(--text);
}
.google svg { width: 20px; height: 20px; }
.google:hover { background: #e9f7ff; }
.google:focus-visible { outline: 2px solid var(--arc); outline-offset: 3px; }
.fine { margin: 18px 0 0; color: var(--ink-3); font-size: 13.5px; }