:root{
  --bg: #050b16;
  --text: rgba(255,255,255,0.93);
  --muted: rgba(255,255,255,0.72);
  --faint: rgba(255,255,255,0.14);

  /* logo aligned blues */
  --aqua: rgba(46, 201, 224, 0.22);
  --sky: rgba(67, 191, 246, 0.18);
  --royal: rgba(19, 110, 216, 0.18);
  --deep: rgba(12, 64, 153, 0.16);

  --accentBorder: rgba(67, 191, 246, 0.35);
  --accentFill: rgba(67, 191, 246, 0.10);
}

*{ box-sizing: border-box; }

html, body{
  height: 100%;
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: var(--bg);
  color: var(--text);
}

body{
  background:
    radial-gradient(900px 540px at 50% 18%, var(--sky), transparent 62%),
    radial-gradient(740px 460px at 16% 92%, var(--deep), transparent 58%),
    radial-gradient(640px 420px at 86% 84%, var(--aqua), transparent 56%),
    radial-gradient(520px 360px at 78% 20%, var(--royal), transparent 60%),
    var(--bg);
}

.top{
  position: fixed;
  top: 18px;
  right: 22px;
  left: 22px;
  display: flex;
  justify-content: flex-end;
  pointer-events: none;
}

.top-link{
  pointer-events: auto;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.top-link:hover{
  color: var(--text);
  border-color: var(--accentBorder);
  background: var(--accentFill);
}

.centre{
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 26px;
  text-align: center;
}

.stack{
  width: min(860px, 100%);
  display: grid;
  justify-items: center;
  gap: 18px;
}

.logo{
  width: min(520px, 92vw);
  height: auto;
  display: block;
  filter: drop-shadow(0 18px 34px rgba(0,0,0,0.35));
}

.quote{
  max-width: 820px;
  margin: 0;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.6;
  color: var(--muted);
}

.author{
  display: inline-block;
  margin-left: 8px;
  color: rgba(255,255,255,0.55);
}

.actions{
  display: grid;
  gap: 10px;
  justify-items: center;
}

.btn{
  appearance: none;
  border: 1px solid var(--accentBorder);
  background: var(--accentFill);
  color: var(--text);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  cursor: pointer;
}

.btn:hover{
  background: rgba(67,191,246,0.16);
}

.toast{
  height: 18px;
  margin: 0;
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.show{
  opacity: 1;
  transform: translateY(0);
}