:root {
  color-scheme: light;
  --ink: #171615;
  --muted: #67615b;
  --line: #ddd6cc;
  --surface: #fffdfa;
  --accent: #0d7f74;
  --accent-dark: #07534d;
  --warm: #f4efe7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.7;
}

.shell {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0;
}

.hero {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(36px, 7vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 700px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
}

.tools {
  padding: 40px 0 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

.section-heading h2 {
  margin-bottom: 0;
  font-size: 24px;
}

.section-heading p {
  max-width: 520px;
  margin-bottom: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.tool-card {
  min-height: 220px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--warm);
}

.tag {
  display: inline-flex;
  margin-bottom: 24px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.tool-card h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.35;
}

.tool-card p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 24px, 1040px);
    padding: 32px 0;
  }

  .hero {
    padding: 32px 0 30px;
  }

  .section-heading {
    display: block;
  }

  .section-heading h2 {
    margin-bottom: 8px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}