:root {
  --ink: #1c2430;
  --muted: #5a6573;
  --paper: #f3f5f8;
  --accent: #0f6e8c;
  --accent-deep: #0a4f65;
  --line: rgba(28, 36, 48, 0.12);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(900px 480px at 80% -10%, rgba(15, 110, 140, 0.16), transparent 55%),
    linear-gradient(180deg, #eef3f7, var(--paper) 45%, #e7edf3);
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.shell {
  width: min(560px, 100%);
  text-align: center;
  display: grid;
  gap: 1.1rem;
  animation: rise 0.55s ease both;
}

.brand {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.3rem);
  letter-spacing: -0.03em;
  font-weight: 600;
}

.brand span { color: var(--accent); }

.shell h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4vw, 2rem);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.shell p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.notice {
  margin-top: 0.35rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 36px rgba(28, 36, 48, 0.08);
  display: grid;
  gap: 0.85rem;
}

.notice .label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-deep);
  font-weight: 650;
}

.btn {
  appearance: none;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.95rem 1.4rem;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  background: var(--accent-deep);
  transform: translateY(-1px);
}

.foot {
  font-size: 0.85rem;
  color: var(--muted);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}