:root {
  --ss-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  --ss-bg: #e8f4f7;
  --ss-bg-end: #fafcfd;
  --ss-text: #1a3d47;
  --ss-muted: #5f7d86;
  --ss-accent: #1a8a9e;
}

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

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

body {
  font-family: var(--ss-font);
  color: var(--ss-text);
  background:
    radial-gradient(ellipse 70% 50% at 20% 10%, rgba(74, 144, 184, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 45% at 90% 90%, rgba(42, 157, 143, 0.12), transparent 50%),
    linear-gradient(165deg, var(--ss-bg) 0%, var(--ss-bg-end) 100%);
  background-attachment: fixed;
}

.ss-default {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.ss-default__logo {
  width: min(280px, 78vw);
  height: auto;
  margin-bottom: 28px;
}

.ss-default__tagline {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ss-text);
}

.ss-default__note {
  margin: 0 0 28px;
  max-width: 22rem;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ss-muted);
}

.ss-default__mail {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid rgba(26, 138, 158, 0.28);
  background: rgba(255, 255, 255, 0.75);
  color: var(--ss-accent);
  font-size: 0.875rem;
  font-weight: 650;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.15s ease;
}

.ss-default__mail:hover {
  background: #fff;
  transform: translateY(-1px);
}

.ss-default__foot {
  margin-top: auto;
  padding-top: 48px;
  font-size: 0.75rem;
  color: var(--ss-muted);
}