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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--text);
  font-family: var(--font-jp);
  font-size: var(--text-base);
  line-height: 1.9;
  letter-spacing: 0.03em;
  overflow-x: hidden;
}

[hidden] {
  display: none !important;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-round);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--pink);
  outline-offset: 3px;
  border-radius: 6px;
}

.wrap {
  width: min(100% - var(--gutter) * 2, var(--measure));
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: var(--space-section);
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  translate: -50% -160%;
  z-index: 200;
  padding: 0.7em 1.4em;
  background: var(--pink);
  color: var(--white);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: translate var(--duration-fast) var(--ease-out-expo);
}

.skip-link:focus {
  translate: -50% 0;
}

/* ---------- 見出し ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-en);
  font-size: var(--text-sm);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--pink);
}

.eyebrow::before {
  content: "";
  width: 1.7em;
  height: 0.8em;
  background: currentColor;
  mask: var(--ears) center / contain no-repeat;
  -webkit-mask: var(--ears) center / contain no-repeat;
}

.section-head {
  display: grid;
  justify-items: center;
  gap: 0.9rem;
  margin-bottom: clamp(2rem, 1.2rem + 2.6vw, 3.6rem);
  text-align: center;
}

.section-title {
  font-size: var(--text-h2);
  color: var(--text);
}

.section-title .pink {
  color: var(--pink);
}

.section-title .cyan {
  color: var(--gold);
}

.section-note {
  max-width: 44rem;
  color: var(--text-mid);
  font-size: var(--text-base);
}

/* ---------- ボタン ---------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7em;
  padding: 1em 2.2em;
  border: 0;
  border-radius: var(--radius-pill);
  background: linear-gradient(100deg, var(--pink) 0%, var(--pink-deep) 100%);
  color: var(--white);
  font-family: var(--font-round);
  font-weight: 700;
  font-size: clamp(0.95rem, 0.9rem + 0.3vw, 1.1rem);
  letter-spacing: 0.06em;
  line-height: 1.4;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(255, 79, 157, 0.32);
  transition: translate var(--duration-fast) var(--ease-spring),
    box-shadow var(--duration-fast) var(--ease-out-expo);
}

.btn .arrow {
  transition: translate var(--duration-fast) var(--ease-spring);
}

.btn--ghost {
  background: var(--white);
  border: 2px solid var(--pink-soft);
  color: var(--pink-deep);
  box-shadow: 0 8px 20px rgba(255, 79, 157, 0.16);
}

.btn--sm {
  padding: 0.65em 1.4em;
  font-size: var(--text-sm);
}

.btn--wide {
  width: min(100%, 24rem);
}

@media (hover: hover) {
  .btn:hover {
    translate: 0 -3px;
    box-shadow: 0 16px 32px rgba(255, 79, 157, 0.42);
  }

  .btn:hover .arrow {
    translate: 0.25em 0;
  }

  .btn--ghost:hover {
    border-color: var(--pink);
    box-shadow: 0 14px 28px rgba(255, 79, 157, 0.26);
  }
}

/* ---------- 装飾 ---------- */

/* 星屑。セクションの背景に散らす */
.stardust {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(2px 2px at 20% 30%, rgba(216, 164, 95, 0.45), transparent),
    radial-gradient(1.6px 1.6px at 70% 20%, rgba(255, 140, 189, 0.45), transparent),
    radial-gradient(2.2px 2.2px at 45% 70%, rgba(240, 205, 154, 0.5), transparent),
    radial-gradient(1.4px 1.4px at 85% 60%, rgba(255, 79, 157, 0.32), transparent),
    radial-gradient(1.8px 1.8px at 12% 82%, rgba(216, 164, 95, 0.4), transparent);
  background-size: 340px 340px, 420px 420px, 300px 300px, 500px 500px, 380px 380px;
  opacity: 0.9;
  pointer-events: none;
}

.neon-rule {
  width: min(100%, 22rem);
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--pink), var(--gold), transparent);
}

/* JSが動く環境でだけ隠す。JS無効・エラー時は本文がそのまま読める */
.js .reveal {
  opacity: 0;
  translate: 0 28px;
  transition: opacity var(--duration-slow) var(--ease-out-expo),
    translate var(--duration-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

.js .reveal.is-visible {
  opacity: 1;
  translate: 0 0;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js .reveal {
    opacity: 1;
    translate: none;
  }
}