:root {
  color: #1f2a24;
  background: #fbf7ee;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 85% 8%, rgba(224, 168, 58, 0.2), transparent 25rem),
    linear-gradient(180deg, #fbf7ee 0%, #f1eadc 100%);
}

a {
  color: inherit;
}

.buy-page main {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.ad-disclosure {
  margin: 0 0 10px;
  color: #777;
  font-size: 12px;
  line-height: 1.6;
}

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

h1 {
  margin-bottom: 12px;
  font-size: clamp(28px, 7vw, 42px);
  line-height: 1.25;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 14px;
  font-size: 22px;
  line-height: 1.45;
}

.page-title {
  margin: 0 0 24px;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.35;
  letter-spacing: -0.03em;
}

.buy-hero {
  display: grid;
  gap: 28px;
  align-items: center;
  padding: 12px 0 8px;
}

.quick-notes {
  display: grid;
  gap: 10px;
  align-content: center;
}

.point-grid {
  display: grid;
  gap: 12px;
}

.point-grid article {
  padding: 1rem;
  border: 1px solid rgba(31, 42, 36, 0.12);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.66);
}

.point-grid h2 {
  margin: 0 0 0.35rem;
  color: #1f2a24;
  font-size: 1rem;
  line-height: 1.5;
}

.point-grid p {
  margin: 0;
  color: #5e665f;
  font-size: 0.95rem;
  line-height: 1.65;
}

.point-grid .soft-warning {
  background: #fff1ec;
  border-color: rgba(207, 102, 57, 0.24);
}

.point-grid .soft-warning h2 {
  color: #8a4b22;
}

.hero-product {
  display: block;
  width: min(360px, 100%);
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(31, 42, 36, 0.12);
  border-radius: 2rem;
  box-shadow: 0 26px 60px rgba(31, 42, 36, 0.13);
  text-decoration: none;
}

.hero-product img,
.product-thumb img {
  display: block;
  width: 100%;
  height: auto;
}

.buy-section {
  margin-top: 40px;
  padding: clamp(1.4rem, 4vw, 2.2rem);
  border: 1px solid rgba(31, 42, 36, 0.12);
  border-radius: 1.7rem;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 18px 44px rgba(31, 42, 36, 0.08);
}

.product-area {
  display: grid;
  gap: 18px;
  align-items: center;
}

.product-thumb {
  display: block;
  width: 120px;
  padding: 10px;
  border: 1px solid rgba(31, 42, 36, 0.12);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.74);
}

.buy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  color: #fff;
  background: #bf0000;
  box-shadow: 0 14px 30px rgba(191, 0, 0, 0.18);
  font-weight: 800;
  text-decoration: none;
}

.wide {
  width: fit-content;
}

.link-trust {
  margin: -10px 0 0;
  color: #777;
  font-size: 12px;
  line-height: 1.6;
}

@media (min-width: 760px) {
  .buy-page main {
    padding-top: 48px;
  }

  .buy-hero {
    grid-template-columns: minmax(0, 1.3fr) 400px;
    gap: 42px;
  }

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

  .hero-product {
    margin: 0;
  }

  .product-area {
    grid-template-columns: 120px minmax(0, 1fr) auto;
  }

  .link-trust {
    grid-column: 3;
    justify-self: center;
  }
}

@media (max-width: 759px) {
  .product-thumb {
    display: none;
  }
}