/* ============================================
   fuku LP - Forest Entrance (Approach A)
   Brand design tokens + layout
   ============================================ */

/* --- Custom Properties --- */
:root {
  /* Brand Colors */
  --fuku-base: #FDF6E3;
  --fuku-primary: #2D5A27;
  --fuku-secondary: #3A6B8C;
  --fuku-accent: #E67E22;
  --fuku-neutral: #8B7355;

  /* Extended */
  --fuku-text: #2D5A27;
  --fuku-text-muted: #5D6D7E;
  --fuku-card-border: rgba(45, 90, 39, 0.15);

  /* Typography */
  --font-ja: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-en: 'Poppins', 'Inter', var(--font-ja);

  --fs-h2: 1.5rem;
  --fs-h3: 1.25rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-xs: 0.75rem;

  --lh-normal: 1.6;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-card-hover: 0 8px 24px rgba(45, 90, 39, 0.15);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-out);
}

/* --- Reset --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* --- Base --- */
html {
  font-size: 16px;
}

body {
  font-family: var(--font-ja);
  color: var(--fuku-text);
  background: var(--fuku-base);
  line-height: var(--lh-normal);
  min-height: 100vh;
  overflow-y: auto;
}

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

a {
  color: var(--fuku-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--fuku-accent);
}

a.card:hover {
  color: inherit;
}


/* --- Accessibility --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--fuku-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --- Page Layout --- */
.page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  max-width: 100%;
  padding: var(--space-2xl) var(--space-xl);
  gap: var(--space-2xl);
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  width: 100%;
  font-size: var(--fs-small);
  color: var(--fuku-text-muted);
  padding-top: var(--space-xs);
}

.breadcrumb__link {
  color: var(--fuku-secondary);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.breadcrumb__link:hover {
  color: var(--fuku-accent);
}

.breadcrumb__divider {
  color: var(--fuku-text-muted);
  user-select: none;
  margin: 0 0.5em;
  opacity: 0.6;
}

.breadcrumb__current {
  color: var(--fuku-text-muted);
  letter-spacing: 0.05em;
}

/* --- Header --- */
.header {
  text-align: center;
}

.header__title {
  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--fuku-text);
  margin-bottom: 0.5rem;
  text-decoration: none;
}

.header__tagline {
  font-size: var(--fs-small);
  color: var(--fuku-text-muted);
  letter-spacing: 0.05em;
}

/* --- Cards Section --- */
.cards {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.cards__grid {
  display: grid;
  grid-template-columns: repeat(2, 320px);
  gap: var(--space-lg);
  justify-content: center;
}

/* --- Card (16:9) --- */
.card {
  aspect-ratio: 16 / 9;
  width: 100%;
  background: var(--fuku-base);
  border: 1px solid var(--fuku-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-card-hover);
}

.card__title {
  font-family: var(--font-en);
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--fuku-primary);
  margin-bottom: var(--space-xs);
}

.card__desc {
  font-size: var(--fs-small);
  color: var(--fuku-text-muted);
}

/* Coming soon badge */
.card--soon {
  position: relative;
  cursor: default;
}

.card--soon:hover {
  transform: none;
  box-shadow: none;
}

.card__badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  font-family: var(--font-en);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fuku-text-muted);
  background: rgba(45, 90, 39, 0.06);
  padding: 0.15em 0.45em;
  border-radius: 2px;
}

/* Card accent borders (per project) */
.card[data-project="worldline"] { border-top: 3px solid var(--fuku-primary); }
.card[data-project="marron"]    { border-top: 3px solid var(--fuku-secondary); }
.card[data-project="oss"]        { border-top: 3px solid var(--fuku-neutral); }
.card[data-project="opclabs"]   { border-top: 3px solid var(--fuku-accent); }

/* worldline inner cards - green */
.card[data-project="stories"],
.card[data-project="characters"],
.card[data-project="worldbuilding"],
.card[data-project="gallery"] { border-top: 3px solid var(--fuku-primary); }

/* labs inner cards - orange */
.card[data-project="lab-oss"],
.card[data-project="lab-opc"],
.card[data-project="lab-blog"],
.card[data-project="lab-community"] { border-top: 3px solid var(--fuku-accent); }

/* web&apps inner cards - brown */
.card[data-project="portfolio"],
.card[data-project="tools"],
.card[data-project="templates"],
.card[data-project="experiments"] { border-top: 3px solid var(--fuku-neutral); }

/* --- Footer --- */
.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.footer__nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.footer__link {
  font-size: var(--fs-small);
  color: var(--fuku-secondary);
  transition: color var(--transition-fast);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.footer__link:hover {
  color: var(--fuku-accent);
}

.footer__divider {
  color: var(--fuku-card-border);
  user-select: none;
}

.footer__copyright {
  font-size: var(--fs-xs);
  color: var(--fuku-text-muted);
}

/* --- Sub-page Layout --- */
.page--sub {
  justify-content: flex-start;
  max-width: 720px;
  margin: 0 auto;
}

.sub-content {
  width: 100%;
  padding: var(--space-lg) 0;
}

.sub-content h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--fuku-primary);
}

.sub-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

.sub-content ul {
  padding-left: var(--space-lg);
  margin-top: var(--space-sm);
}

.sub-content li {
  margin-bottom: var(--space-xs);
}

.sub-content a {
  color: var(--fuku-secondary);
  text-decoration: underline;
}

.sub-content p + p {
  margin-top: var(--space-md);
}

.sub-content strong {
  font-weight: 700;
}

.sub-content ul ul {
  margin-top: var(--space-xs);
}

.sub-content small {
  font-size: 0.875rem;
}

.sub-content a[href^="mailto:"] {
  color: var(--fuku-secondary);
}

.footer__link[aria-current="page"] {
  color: var(--fuku-primary);
  font-weight: 500;
}

/* ============================================
   Responsive
   ============================================ */

/* Tablet (640-1024px) */
@media (max-width: 1024px) {
  .cards__grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 480px;
    gap: var(--space-md);
  }

  .header__title {
    font-size: 3rem;
  }

  .page {
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-xl);
  }
}

/* Mobile (<640px) */
@media (max-width: 639px) {
  .page {
    justify-content: flex-start;
    padding: var(--space-xl) var(--space-lg);
    padding-top: calc(var(--space-xl) + env(safe-area-inset-top, 0px));
    padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom, 0px));
    gap: var(--space-lg);
  }

  .header__title {
    font-size: 2.5rem;
  }

  .cards__grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    gap: var(--space-md);
  }

  .card {
    flex-direction: row;
    justify-content: flex-start;
    aspect-ratio: auto;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
  }

  .footer {
    padding-top: var(--space-md);
  }

  .footer__nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
  }

  .breadcrumb {
    font-size: var(--fs-xs);
  }

  .sub-content {
    padding: var(--space-md) 0;
  }
}

/* Print */
@media print {
  .breadcrumb,
  .footer {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .page {
    min-height: auto;
    padding: 0;
    gap: 0;
  }

  .sub-content a {
    color: #000;
    text-decoration: underline;
  }

  .sub-content h2 {
    page-break-after: avoid;
  }
}