:root {
  --bg: #f6efe3;
  --paper: #fffdf8;
  --ink: #19212b;
  --muted: #4f5968;
  --accent: #d55c2f;
  --accent-dark: #9c3613;
  --line: #eadcc8;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 12% 15%, #ffe4bc 0%, transparent 42%),
    radial-gradient(circle at 85% 8%, #ffd5bc 0%, transparent 35%), var(--bg);
  line-height: 1.65;
}

.ambient-bg {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.08) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.08) 25%, transparent 25%);
  background-size: 38px 38px;
  opacity: 0.4;
  pointer-events: none;
}

.hero,
main,
footer {
  position: relative;
  z-index: 1;
  width: min(960px, calc(100% - 2rem));
  margin-inline: auto;
}

.hero {
  padding: 5.5rem 0 3rem;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 0.85rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.6);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 3.8rem);
  letter-spacing: 0.03em;
}

.lead {
  margin: 1rem 0 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: clamp(1rem, 2.5vw, 1.15rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 9.5rem;
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 200ms ease, box-shadow 200ms ease, background-color 200ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: linear-gradient(135deg, var(--accent), #c84b1a);
  color: #fff;
  box-shadow: 0 8px 18px rgba(199, 68, 24, 0.27);
}

.button.primary:hover {
  background: linear-gradient(135deg, #e16c3d, #b94418);
}

.button.ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.65);
}

main {
  display: grid;
  gap: 1rem;
  padding-bottom: 2rem;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(1.15rem, 3vw, 2rem);
  box-shadow: 0 16px 32px rgba(61, 33, 18, 0.08);
}

h2 {
  margin-top: 0;
  margin-bottom: 0.85rem;
  font-size: clamp(1.2rem, 3vw, 1.6rem);
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

.feature-list li {
  padding: 0.85rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fffdfa, #fff8eb);
}

.feature-list h3 {
  margin: 0;
  font-size: 1rem;
}

.feature-list p {
  margin: 0.35rem 0 0;
  color: var(--muted);
}

.steps {
  margin: 0;
  padding-left: 1.25rem;
}

.note {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

footer {
  padding: 1rem 0 2rem;
  text-align: center;
  color: var(--muted);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 450ms ease, transform 450ms ease;
}

[data-reveal].shown {
  opacity: 1;
  transform: none;
}

@media (max-width: 640px) {
  .hero {
    padding-top: 4.2rem;
  }

  .panel {
    border-radius: 16px;
  }
}