:root {
  --ink: #262626;
  --muted: #646464;
  --paper: #fffaf2;
  --paper-deep: #f6efe2;
  --red: #d94f45;
  --red-dark: #b93731;
  --line: rgba(38, 38, 38, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Noto Sans JP", "Hiragino Sans", Arial, sans-serif;
  background:
    radial-gradient(circle at top right, rgba(217, 79, 69, 0.14), transparent 30%),
    linear-gradient(135deg, var(--paper), var(--paper-deep));
  color: var(--ink);
  overflow-x: hidden;
}

.page-bg::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(38,38,38,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38,38,38,0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.sakura {
  position: fixed;
  width: 90px;
  opacity: 0.28;
  pointer-events: none;
}
.sakura-one { top: 7%; left: 6%; transform: rotate(-18deg); }
.sakura-two { top: 18%; right: 8%; width: 70px; transform: rotate(20deg); }
.sakura-three { bottom: 18%; left: 12%; width: 56px; transform: rotate(36deg); }

.hero {
  width: min(1180px, 92%);
  min-height: calc(100vh - 120px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 0.95fr;
  gap: 34px;
  align-items: center;
  padding: 56px 0 34px;
}

.content-card, .art-card {
  position: relative;
  border: 1px solid var(--line);
  background: rgba(255, 250, 242, 0.78);
  border-radius: 32px;
  box-shadow: 0 24px 70px rgba(38, 38, 38, 0.12);
  backdrop-filter: blur(10px);
}

.content-card {
  padding: clamp(30px, 5vw, 60px);
  overflow: hidden;
}

.brand-row {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 54px;
}

.brand-mark {
  width: 56px;
  height: 56px;
}

.brand-name {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.brand-jp {
  margin-top: 4px;
  color: var(--red);
  font-size: 14px;
  letter-spacing: 0.35em;
  font-weight: 700;
}

.stamp {
  position: absolute;
  top: 44px;
  right: 44px;
  width: 82px;
  height: 82px;
  display: grid;
  place-items: center;
  border: 4px solid var(--red);
  color: var(--red);
  font-weight: 800;
  font-size: 24px;
  transform: rotate(8deg);
  opacity: 0.82;
  border-radius: 10px;
}

h1 {
  margin: 0;
  max-width: 610px;
  font-size: clamp(44px, 8vw, 82px);
  line-height: 0.96;
  letter-spacing: -0.07em;
}

.intro {
  max-width: 560px;
  margin: 28px 0 30px;
  font-size: 19px;
  line-height: 1.75;
  color: var(--muted);
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
}

.feature-list span {
  padding: 10px 14px;
  border: 1px solid rgba(217, 79, 69, 0.25);
  background: rgba(255,255,255,0.58);
  border-radius: 999px;
  color: var(--red-dark);
  font-weight: 700;
  font-size: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  background: var(--red);
  color: white;
  text-decoration: none;
  font-weight: 800;
  box-shadow: 0 12px 30px rgba(217, 79, 69, 0.34);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 38px rgba(217, 79, 69, 0.42);
}

.art-card {
  min-height: 540px;
  display: grid;
  place-items: center;
  padding: 32px;
  overflow: hidden;
}

.art-card::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  background: var(--red);
  border-radius: 50%;
  opacity: 0.09;
  top: 44px;
  right: 18px;
}

.art-card img {
  width: min(100%, 560px);
  position: relative;
  z-index: 1;
}

footer {
  width: min(1180px, 92%);
  margin: 0 auto 28px;
  text-align: center;
  color: #817b72;
  font-size: 14px;
}

footer img {
  width: 100%;
  max-height: 55px;
  object-fit: cover;
  opacity: 0.55;
  margin-bottom: 8px;
}

@media (max-width: 880px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 28px;
  }

  .brand-row {
    margin-bottom: 38px;
  }

  .stamp {
    width: 64px;
    height: 64px;
    font-size: 18px;
    top: 28px;
    right: 28px;
  }

  .art-card {
    min-height: 360px;
  }
}

@media (max-width: 520px) {
  .content-card, .art-card {
    border-radius: 24px;
  }

  .brand-name { font-size: 27px; }
  .brand-jp { font-size: 12px; }
  .brand-mark { width: 48px; height: 48px; }
  .stamp { display: none; }
}