/* ==========================================================================
   Base: design tokens, reset, shared button
   ========================================================================== */

:root {
  --color-gold: #cbac68;
  --color-gold-dark: #967b42;
  --color-header-bg: #fffdf8;
  --color-cream: #f5f1e8;
  --color-ivory: #fbfaf7;
  --color-sand: #f0efeb;
  --color-gray-bg: #f5f5f3;
  --color-ink: #111827;
  --color-text: #374151;
  --color-muted: #4b5563;
  --color-border: #e5e7eb;
  --color-card-border: #c4c4c4;
  --color-line: #393939;

  --font-base: 'Noto Sans JP', sans-serif;
  --font-display: 'Poppins', sans-serif;
  --font-inter: 'Inter', sans-serif;

  --header-height: 80px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: var(--font-base);
  font-weight: 400;
  color: #000;
  background: #fff;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, figure {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

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

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-gold-dark);
  outline-offset: 2px;
}

/* Shared gold button (hero, concept, virtual human, "Read more", ...) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 54px;
  min-width: 228px;
  padding: 12px 30px;
  border-radius: 4px;
  background: var(--color-gold);
  color: #fff;
  font-family: var(--font-base);
  font-weight: 700;
  font-size: 20px;
  line-height: 30px;
  text-align: center;
  white-space: nowrap;
  transition: opacity 0.2s ease;
}

.btn:hover {
  opacity: 0.88;
}

@media (max-width: 480px) {
  .btn {
    height: 48px;
    min-width: 200px;
    font-size: 18px;
    line-height: 26px;
  }
}

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