*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f0f4f8;
  color: #111827;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 480px;
  padding: 48px 20px;
}

/* ── Header ── */
header {
  text-align: center;
  margin-bottom: 40px;
}

.brand {
  font-size: 2rem;
  font-weight: 800;
  color: #2563eb;
  letter-spacing: -1px;
}

.subtitle {
  margin-top: 6px;
  font-size: 0.82rem;
  color: #9ca3af;
  letter-spacing: 0.04em;
}

/* ── Button ── */
main {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-btn {
  display: block;
  width: 100%;
  padding: 12px 22px;
  background: #2563eb;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  transition: opacity 0.15s;
}

.service-btn:hover {
  opacity: 0.85;
}

/* ── Footer ── */
footer {
  margin-top: 28px;
  text-align: center;
  font-size: 0.78rem;
  color: #c4c9d4;
}