:root {
  --intro-bg: #f4f1e8;
  --intro-card-bg: #fff8d8;
  --intro-text: #17130f;
  --intro-muted: #534b40;
  --intro-line: #111111;
  --intro-button-bg: #6eb6ef;
  --intro-button-text: #111111;
  --intro-button-hover: #f4a9c4;

  --intro-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --intro-title-font: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: var(--intro-font);
  color: var(--intro-text);
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.35), transparent 30%),
    linear-gradient(180deg, var(--intro-bg), #efe989);
}

.intro-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(18px, 4vw, 48px);
}

.intro-card {
  width: min(1120px, 100%);
  display: grid;
  grid-template-columns: minmax(280px, 1.15fr) minmax(260px, .85fr);
  gap: clamp(18px, 4vw, 44px);
  align-items: center;
}

.intro-image-wrap {
  background: #f3ef92;
  border: 4px solid var(--intro-line);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: 10px 10px 0 rgba(0,0,0,.18);
}

.intro-image {
  width: 100%;
  display: block;
}

.intro-textbox {
  background: var(--intro-card-bg);
  border: 4px solid var(--intro-line);
  border-radius: 28px;
  padding: clamp(22px, 4vw, 38px);
  box-shadow: 10px 10px 0 rgba(0,0,0,.18);
}

.intro-textbox h1 {
  margin: 0 0 16px;
  font-family: var(--intro-title-font);
  font-size: clamp(2rem, 5vw, 4.25rem);
  line-height: .95;
  letter-spacing: -.04em;
}

.intro-textbox p {
  margin: 0 0 14px;
  color: var(--intro-muted);
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  line-height: 1.45;
}

.intro-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 14px;
  padding: 14px 18px;
  min-height: 48px;
  border: 3px solid var(--intro-line);
  border-radius: 999px;
  background: var(--intro-button-bg);
  color: var(--intro-button-text);
  text-decoration: none;
  font-weight: 800;
  box-shadow: 5px 5px 0 rgba(0,0,0,.22);
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}

.intro-button:hover,
.intro-button:focus-visible {
  background: var(--intro-button-hover);
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0,0,0,.22);
}

@media (max-width: 820px) {
  .intro-card {
    grid-template-columns: 1fr;
  }

  .intro-textbox {
    order: 2;
  }

  .intro-image-wrap {
    order: 1;
  }
}

@media (max-width: 520px) {
  .intro-page {
    padding: 14px;
    place-items: start center;
  }

  .intro-image-wrap,
  .intro-textbox {
    border-width: 3px;
    border-radius: 20px;
    box-shadow: 6px 6px 0 rgba(0,0,0,.18);
  }

  .intro-textbox {
    padding: 18px;
  }

  .intro-button {
    width: 100%;
  }
}