:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-border: rgba(7, 17, 31, 0.1);
  --text: #07111f;
  --muted: #07111f;
  --accent: #07111f;
  --shadow: 0 24px 60px rgba(7, 17, 31, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(7, 17, 31, 0.05), transparent 42%),
    linear-gradient(180deg, #f8f6f2 0%, var(--bg) 58%);
}

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 18px;
}

.card {
  width: min(600px, 100%);
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 32px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.banner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 30px 22px;
}

.banner-logo {
  width: min(312px, 84%);
  height: auto;
  display: block;
}

.intro {
  padding: 44px 34px 10px;
  text-align: center;
}

.intro-copy {
  max-width: 410px;
  margin: 0 auto;
  color: var(--muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.intro-lead {
  width: min(13ch, 100%);
  margin: 0 auto 18px;
  font-size: clamp(1.52rem, 3vw, 1.84rem);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--text);
}

.intro-support,
.intro-body,
.intro-closing {
  margin: 0 auto;
  font-weight: 400;
  color: var(--muted);
}

.intro-support {
  width: min(25ch, 100%);
  margin-bottom: 14px;
  font-size: 0.98rem;
  font-style: italic;
  line-height: 1.58;
  color: rgba(7, 17, 31, 0.82);
}

.intro-body {
  width: min(39ch, 100%);
  margin-bottom: 18px;
  font-size: 0.96rem;
  line-height: 1.72;
  color: rgba(7, 17, 31, 0.74);
}

.intro-closing {
  width: min(23ch, 100%);
  font-size: 1rem;
  font-style: italic;
  line-height: 1.54;
  letter-spacing: 0.01em;
  color: var(--text);
}

@media (max-width: 820px) {
  .card {
    border-radius: 24px;
  }

  .banner {
    padding: 0 18px 20px;
  }

  .intro {
    padding: 38px 24px 8px;
  }

  .intro-copy {
    max-width: 390px;
  }

  .banner-logo {
    width: min(280px, 80%);
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 14px;
  }

  .intro {
    padding: 30px 18px 8px;
  }

  .banner-logo {
    width: min(220px, 72vw);
  }

  .intro-lead {
    margin-bottom: 16px;
    font-size: clamp(1.3rem, 6.2vw, 1.56rem);
  }

  .intro-support,
  .intro-body,
  .intro-closing {
    font-size: 0.9rem;
  }
}