/* ============================================================
   Grovyn Site Footer — Editorial Asymmetric (demo-a v3)
   spec: docs/superpowers/specs/2026-05-22-footer-morph-redesign-design.md
   設計：左大 brand block（icon 64 + Fraunces italic GROVYN + tagline）
        | 1px moss hairline |
        右直排 nav + social + legal
   ============================================================ */

/* 用 #site-footer.grovyn-footer 拉到 ID specificity (0,1,1,0)，
   蓋過 style.css 的 #site-footer { padding: 1.5rem 0; border-top: 1px solid #eee } */
#site-footer.grovyn-footer {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  color: var(--ts-cream, #EEEAE7);
  font-family: var(--ts-font-sans-zh, 'Noto Sans TC', sans-serif);
  /* 純黑底：path 凹陷時露出 footer 自身背景，避免透出 body 米色 */
  background-color: #000;
  border-top: none;
  text-align: initial;
  padding: 0;
  min-height: 380px;
}

/* SVG 全寬大塊曲線（阿翰原範例 viewBox 2278×683），撐滿 footer */
.grovyn-footer__top-svg {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: visible;
  pointer-events: none;
}

.grovyn-footer__noise {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.08;
  mix-blend-mode: overlay;
}

.grovyn-footer__noise::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

.grovyn-footer__inner {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 48px 48px;
}

.grovyn-footer__columns {
  display: grid;
  grid-template-columns: 60fr 1px 40fr;
  gap: 0 48px;
  align-items: start;
}

.grovyn-footer__left {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.grovyn-footer__brand {
  display: flex;
  align-items: center;
  gap: 18px;
  text-decoration: none;
  color: inherit;
  outline-offset: 4px;
  border-radius: 2px;
}

.grovyn-footer__brand:focus-visible {
  outline: 2px solid var(--ts-moss, #A3AC99);
}

.grovyn-footer__icon {
  flex-shrink: 0;
  width: 88px;
  height: 88px;
  display: block;
}

.grovyn-footer__wordmark {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.grovyn-footer__name {
  font-family: var(--ts-font-serif-en-display, 'Fraunces', Georgia, serif);
  font-style: italic;
  font-size: clamp(3rem, 5vw, 4rem);
  font-weight: 600;
  color: var(--ts-cream, #EEEAE7);
  letter-spacing: -0.02em;
  line-height: 1;
}

.grovyn-footer__sub {
  font-family: var(--ts-font-sans-zh, 'Noto Sans TC', sans-serif);
  font-size: 0.875rem;
  font-weight: 300;
  color: var(--ts-cream, #EEEAE7);
  opacity: 0.65;
  letter-spacing: 0.14em;
}

.grovyn-footer__tagline {
  font-family: var(--ts-font-serif-en-display, 'Fraunces', Georgia, serif);
  font-style: italic;
  font-size: 1rem;
  font-weight: 400;
  color: var(--ts-moss, #A3AC99);
  line-height: 1.6;
  max-width: 420px;
  margin: 0;
}

.grovyn-footer__vdivider {
  width: 1px;
  background: color-mix(in srgb, var(--ts-moss, #A3AC99) 20%, transparent);
  align-self: stretch;
  min-height: 200px;
}

.grovyn-footer__right {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.grovyn-footer__nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.grovyn-footer__nav-link {
  font-family: var(--ts-font-sans-zh, 'Noto Sans TC', sans-serif);
  font-size: 1rem;
  font-weight: 400;
  color: var(--ts-cream, #EEEAE7);
  text-decoration: none;
  display: inline-block;
  cursor: pointer;
  outline-offset: 3px;
  transition: color 250ms var(--ts-ease-natural, cubic-bezier(0.33,0.1,0.25,1));
  width: fit-content;
}

.grovyn-footer__nav-link:hover,
.grovyn-footer__nav-link:focus-visible {
  color: var(--ts-moss, #A3AC99);
}

.grovyn-footer__social {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.grovyn-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--ts-cream, #EEEAE7);
  text-decoration: none;
  cursor: pointer;
  outline-offset: 3px;
  transition: color 250ms var(--ts-ease-natural, cubic-bezier(0.33,0.1,0.25,1)),
              transform 250ms var(--ts-ease-natural, cubic-bezier(0.33,0.1,0.25,1));
}

.grovyn-footer__social-link:hover,
.grovyn-footer__social-link:focus-visible {
  color: var(--ts-sun, #EEE78D);
  transform: translateY(-2px);
}

.grovyn-footer__social-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.grovyn-footer__legal {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.grovyn-footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: center;
}

.grovyn-footer__legal-links a {
  font-family: var(--ts-font-sans-zh, 'Noto Sans TC', sans-serif);
  font-size: 0.8125rem;
  font-weight: 300;
  color: var(--ts-cream, #EEEAE7);
  opacity: 0.6;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 200ms ease;
}

.grovyn-footer__legal-links a:hover,
.grovyn-footer__legal-links a:focus-visible {
  opacity: 1;
}

.grovyn-footer__legal-sep {
  opacity: 0.3;
  font-size: 0.75rem;
}

.grovyn-footer__copyright {
  font-family: var(--ts-font-sans-zh, 'Noto Sans TC', sans-serif);
  font-size: 0.75rem;
  font-weight: 300;
  color: var(--ts-cream, #EEEAE7);
  opacity: 0.35;
  line-height: 1.6;
  margin: 0;
}

/* ─── Responsive: < 768px single column ─── */
@media (max-width: 767px) {
  #site-footer.grovyn-footer {
    padding: 0;
  }
  .grovyn-footer__inner {
    padding: 48px 24px 40px;
  }
  .grovyn-footer__columns {
    grid-template-columns: 1fr;
    gap: 40px 0;
  }
  .grovyn-footer__vdivider {
    width: 100%;
    height: 1px;
    min-height: auto;
    background: color-mix(in srgb, var(--ts-moss, #A3AC99) 20%, transparent);
  }
  .grovyn-footer__name {
    font-size: 2.25rem;
  }
  .grovyn-footer__right {
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .grovyn-footer__brand {
    gap: 14px;
  }
  .grovyn-footer__icon {
    width: 52px;
    height: 52px;
  }
}

/* ─── prefers-reduced-motion ─── */
@media (prefers-reduced-motion: reduce) {
  .grovyn-footer__nav-link,
  .grovyn-footer__social-link,
  .grovyn-footer__legal-links a {
    transition: none;
  }
}