:root {
  --ink: #07131c;
  --blue: #0078b8;
  --mist: #9ec4dc;
  --paper: #f7fbfe;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  overflow: hidden;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(36px, 8vh, 72px);
  padding: 32px 20px 28px;
  background: var(--ink);
  color: var(--paper);
  font-family: "Avenir Next", "Segoe UI", Helvetica, Arial, sans-serif;
}

main {
  position: relative;
  z-index: 1;
  width: min(640px, 100%);
  text-align: center;
}

.kicker {
  margin: 0 0 28px;
  color: var(--mist);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.logo {
  display: block;
  width: min(520px, 100%);
  height: auto;
  margin: 0 auto;
}

.message {
  margin: 28px 0 0;
  color: var(--paper);
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.rings {
  position: relative;
  width: min(520px, 90vw);
  aspect-ratio: 1;
  perspective: 900px;
  transform-style: preserve-3d;
}

.pivot {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transform-origin: center center;
}

.ring {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--size);
  height: var(--size);
  margin-left: calc(var(--size) * -0.5);
  margin-top: calc(var(--size) * -0.5);
  opacity: var(--opacity);
  transform-origin: center center;
  transform-style: preserve-3d;
}

.breathe,
.spin {
  width: 100%;
  height: 100%;
  transform-origin: center;
}

.ring-canvas {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 100vw;
  height: 100vh;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.spin {
  display: block;
  visibility: hidden;
}

.ring circle {
  fill: none;
  stroke: #f7fbfe;
  stroke-width: var(--stroke, 2.5);
  vector-effect: non-scaling-stroke;
  stroke-linecap: butt;
}

@keyframes breathe {
  0% { scale: 1; }
  12.5% { scale: calc(1 + var(--amp) * 0.707); }
  25% { scale: calc(1 + var(--amp)); }
  37.5% { scale: calc(1 + var(--amp) * 0.707); }
  50% { scale: 1; }
  62.5% { scale: calc(1 - var(--amp) * 0.707); }
  75% { scale: calc(1 - var(--amp)); }
  87.5% { scale: calc(1 - var(--amp) * 0.707); }
  100% { scale: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .breathe {
    animation: none;
  }
}