/* ─── 尾巴選物 Design System ─────────────────────────────────────────── */

:root {
  --c-beige:      #F5EFE6;
  --c-cream:      #FAF7F3;
  --c-brown:      #6D5441;
  --c-warm:       #8B6F5C;
  --c-terra:      #C4775A;
  --c-sage:       #94A89A;
  --c-charcoal:   #2C2420;
  --c-light:      #D4C5B5;
  --c-white:      #FFFFFF;

  --ff-cn:        'Noto Serif TC', serif;
  --ff-en:        'Outfit', sans-serif;
  --ff-body:      'Work Sans', sans-serif;

  --nav-h:        72px;
  --ease-smooth:  cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:     cubic-bezier(0, 0, 0.2, 1);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff-body);
  background: var(--c-cream);
  color: var(--c-charcoal);
  overflow-x: hidden;
  line-height: 1.6;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }

/* ─── NAV ─── */
.site-nav {
  position: fixed;
  top: 0; left: 0; width: 100%;
  height: var(--nav-h);
  z-index: 900;
  transition: background 0.45s var(--ease-smooth),
              box-shadow 0.45s var(--ease-smooth);
  display: flex;
  align-items: center;
}

.site-nav .nav-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Transparent state (hero) */
.site-nav:not(.scrolled) {
  background: transparent;
}
.site-nav:not(.scrolled) .nav-link {
  color: rgba(245, 239, 230, 0.9);
}
.site-nav:not(.scrolled) .nav-logo img {
  filter: brightness(0) invert(1);
}
.site-nav:not(.scrolled) .nav-hamburger span {
  background: rgba(245, 239, 230, 0.9);
}

/* Scrolled state */
.site-nav.scrolled {
  background: rgba(250, 247, 243, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(109, 84, 65, 0.08);
}
.site-nav.scrolled .nav-link { color: var(--c-brown); }
.site-nav.scrolled .nav-logo img { filter: none; }
.site-nav.scrolled .nav-hamburger span { background: var(--c-brown); }

.nav-logo img { height: 36px; width: auto; }

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
}
.nav-link {
  font-family: var(--ff-en);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: opacity 0.2s;
}
.nav-link:hover { opacity: 0.6; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  border-radius: 2px;
  transition: background 0.3s;
}

/* ─── MOBILE NAV ─── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: var(--c-cream);
    padding: 40px;
    gap: 24px;
    z-index: 899;
  }
  .nav-links.open .nav-link { color: var(--c-brown); font-size: 18px; }
}

/* ─── FOOTER ─── */
.site-footer {
  background: var(--c-charcoal);
  color: rgba(245, 239, 230, 0.55);
  padding: 60px 40px 40px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(245, 239, 230, 0.1);
}
.footer-brand img { height: 32px; margin-bottom: 16px; }
.footer-brand p { font-size: 13px; line-height: 1.8; }
.footer-col h4 {
  font-family: var(--ff-en);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(245, 239, 230, 0.35);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  line-height: 2;
  color: rgba(245, 239, 230, 0.55);
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--c-terra); }
.footer-bottom {
  max-width: 1280px;
  margin: 24px auto 0;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: rgba(245, 239, 230, 0.3);
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}

/* ─── SCROLL REVEALS ─── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.85s var(--ease-out),
              transform 0.85s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s;
}
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.45s; }

/* ─── UTILITY ─── */
.section-label {
  font-family: var(--ff-en);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-terra);
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--ff-cn);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--c-brown);
  margin-bottom: 24px;
}
.section-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--c-warm);
  max-width: 560px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--c-brown);
  color: var(--c-beige);
  font-family: var(--ff-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 16px 36px;
  border-radius: 40px;
  transition: background 0.3s, transform 0.3s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--c-terra);
  transform: translateY(-2px);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--c-brown);
  font-family: var(--ff-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 34px;
  border-radius: 40px;
  border: 1.5px solid var(--c-brown);
  transition: background 0.3s, color 0.3s, transform 0.3s;
  cursor: pointer;
}
.btn-outline:hover {
  background: var(--c-brown);
  color: var(--c-beige);
  transform: translateY(-2px);
}

/* icon SVGs (replacing emoji) */
.value-icon svg,.contact-icon svg{display:inline-block;vertical-align:middle;}
.btn-wish svg{width:20px;height:20px;fill:none;stroke:#C4775A;stroke-width:1.8;vertical-align:middle;transition:fill .15s;}
.btn-wish.active svg{fill:#C4775A;}