/* ============================================
   詠慈佛像雕刻 - 共用樣式
   Yong Ci Buddhist Sculpture - Shared Styles
   ============================================ */

/* ===== CSS Variables ===== */
:root {
  --color-gold: #c9a84c;
  --color-gold-light: #e8c97a;
  --color-gold-dark: #9a7530;
  --color-gold-faint: #f9f0d8;
  --color-red: #8b1a1a;
  --color-red-dark: #6b1010;
  --color-dark: #1a1008;
  --color-dark-2: #2c1f0e;
  --color-dark-3: #3d2d14;
  --color-brown: #5c3d1e;
  --color-text: #3a2c1a;
  --color-text-light: #6b5535;
  --color-text-muted: #9e8560;
  --color-bg: #fdfaf4;
  --color-bg-warm: #f5ece0;
  --color-bg-cream: #faf6ef;
  --color-white: #ffffff;
  --color-border: #dfd0b0;

  --font-serif: 'Noto Serif TC', 'Georgia', serif;
  --font-sans: 'Noto Sans TC', 'Arial', sans-serif;

  --shadow-sm: 0 2px 8px rgba(90, 50, 10, 0.08);
  --shadow-md: 0 6px 24px rgba(90, 50, 10, 0.12);
  --shadow-lg: 0 12px 48px rgba(90, 50, 10, 0.16);
  --shadow-gold: 0 4px 20px rgba(201, 168, 76, 0.35);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition: 0.3s ease;
  --transition-slow: 0.6s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-sans);
}

/* ===== Utility ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: var(--radius-sm);
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: var(--transition);
  cursor: pointer;
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold), var(--color-gold-light));
  color: var(--color-dark);
  box-shadow: var(--shadow-gold);
  border: 1px solid var(--color-gold-light);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(201, 168, 76, 0.5);
  filter: brightness(1.08);
}

.btn-outline {
  background: transparent;
  color: var(--color-gold-light);
  border: 1.5px solid var(--color-gold);
}
.btn-outline:hover {
  background: rgba(201, 168, 76, 0.12);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--color-gold-dark);
  background: var(--color-gold-faint);
  border: 1px solid var(--color-gold);
  padding: 4px 16px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.3;
  margin-bottom: 16px;
}

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

.section-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 12px 0;
}

.section-divider::before,
.section-divider::after {
  content: '';
  width: 80px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-gold), transparent);
}

.divider-ornament {
  color: var(--color-gold);
  font-size: 1rem;
}

.section-desc {
  color: var(--color-text-light);
  font-size: 1rem;
  max-width: 560px;
  margin: 16px auto 0;
  line-height: 1.8;
}

.section-header.light .section-desc {
  color: rgba(255, 240, 200, 0.75);
}

/* ===== Animations ===== */
.fade-in,
.fade-in-left,
.fade-in-right {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-left { transform: translateX(-32px); }
.fade-in-right { transform: translateX(32px); }

.fade-in.visible,
.fade-in-left.visible,
.fade-in-right.visible {
  opacity: 1;
  transform: translate(0);
}

/* ===== Header / Nav ===== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  padding: 16px 0;
}

#header.scrolled {
  background: rgba(26, 16, 8, 0.97);
  backdrop-filter: blur(12px);
  padding: 10px 0;
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(201, 168, 76, 0.2);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-icon-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 50%;
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(201, 168, 76, 0.6));
}

.footer-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 50%;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--color-gold-light);
  line-height: 1.2;
  letter-spacing: 0.1em;
}

.logo-sub {
  font-size: 0.65rem;
  color: rgba(232, 201, 122, 0.6);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: rgba(255, 240, 200, 0.85);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 14px;
  right: 14px;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--color-gold-light);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.lang-toggle {
  border: 1px solid rgba(201, 168, 76, 0.45);
  background: rgba(201, 168, 76, 0.12);
  color: var(--color-gold-light);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  transition: var(--transition);
  flex-shrink: 0;
}

.lang-toggle:hover {
  background: rgba(201, 168, 76, 0.22);
  border-color: rgba(201, 168, 76, 0.72);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gold-light);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Gallery Filter ===== */
.gallery-filter {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.filter-btn {
  font-family: var(--font-serif);
  font-size: 0.88rem;
  color: var(--color-text-light);
  background: var(--color-bg-warm);
  border: 1px solid var(--color-border);
  padding: 8px 20px;
  border-radius: 20px;
  transition: var(--transition);
  letter-spacing: 0.05em;
}

.filter-btn:hover,
.filter-btn.active {
  background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
  color: var(--color-dark);
  border-color: var(--color-gold);
  box-shadow: var(--shadow-gold);
}

/* ===== Form ===== */
.contact-form-wrap {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow-md);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-family: var(--font-serif);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-dark);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-bg-cream);
  transition: var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-gold);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 12px;
}

.form-success {
  text-align: center;
  padding: 48px 24px;
}

.form-success i {
  font-size: 3rem;
  color: var(--color-gold);
  margin-bottom: 20px;
  display: block;
}

.form-success h4 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.form-success p {
  color: var(--color-text-light);
  font-size: 1rem;
}

.form-alert {
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.form-alert-error {
  background: rgba(164, 53, 37, 0.1);
  border: 1px solid rgba(164, 53, 37, 0.25);
  color: #8e2818;
}

.form-alert-success {
  background: rgba(38, 112, 74, 0.1);
  border: 1px solid rgba(38, 112, 74, 0.25);
  color: #1f6a43;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 28px;
  border-radius: 28px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 9000;
  white-space: nowrap;
}
.toast.show { opacity: 1; }
.toast.success { background: #22c55e; }
.toast.error { background: #ef4444; }

/* ===== Footer ===== */
.footer {
  background: var(--color-dark);
}

.footer-top {
  padding: 72px 0 48px;
  border-bottom: 1px solid rgba(201, 168, 76, 0.2);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.5fr;
  gap: 48px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gold-light);
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.88rem;
  color: rgba(255, 240, 200, 0.5);
  line-height: 1.8;
  margin-bottom: 24px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(201, 168, 76, 0.1);
  border: 1px solid rgba(201, 168, 76, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(232, 201, 122, 0.6);
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-dark);
  transform: translateY(-2px);
}

.footer-links h5,
.footer-contact h5 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-gold-light);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(201, 168, 76, 0.2);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links ul li a {
  font-size: 0.88rem;
  color: rgba(255, 240, 200, 0.55);
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: var(--color-gold-light);
  padding-left: 4px;
}

.footer-contact p {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.85rem;
  color: rgba(255, 240, 200, 0.55);
  margin-bottom: 12px;
  line-height: 1.5;
}

.footer-contact p i {
  color: rgba(201, 168, 76, 0.6);
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 3px;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255, 240, 200, 0.35);
  line-height: 1.8;
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
  color: var(--color-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-gold);
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  font-size: 0.9rem;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(201, 168, 76, 0.5);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

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

  .logo-main {
    font-size: 1rem;
  }

  .logo-sub {
    font-size: 0.6rem;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(20, 12, 4, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 80px 32px;
    gap: 8px;
    transition: right 0.4s ease;
    border-left: 1px solid rgba(201, 168, 76, 0.2);
    z-index: 1001;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 1.1rem;
    padding: 10px 0;
    width: 100%;
    border-bottom: 1px solid rgba(201, 168, 76, 0.1);
  }

  .nav-toggle {
    display: flex;
    z-index: 1002;
  }

  .nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

  .gallery-grid,
  .gallery-filter + .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form-wrap {
    padding: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}