/* =====================================================
   Brand Design Tokens — Chinese Garden Studio
   Tone: Luxury/refined editorial, museum-like stillness
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@300;400;500;600;700&family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&display=swap');

:root {
  --color-primary: #1a1714;
  --color-primary-light: #2c2723;
  --color-primary-lighter: #4a433c;
  --color-primary-dark: #0d0b09;
  --color-primary-50: rgba(26, 23, 20, 0.05);
  --color-primary-100: rgba(26, 23, 20, 0.1);
  --color-primary-200: rgba(26, 23, 20, 0.2);
  --color-primary-300: rgba(26, 23, 20, 0.3);

  --color-bg: #f7f4f0;
  --color-bg-subtle: #f0ebe4;
  --color-bg-muted: #e8e2d9;
  --color-bg-elevated: #ffffff;
  --color-bg-overlay: rgba(247, 244, 240, 0.92);

  --color-text-primary: #1a1714;
  --color-text-secondary: #5c544b;
  --color-text-tertiary: #8a8078;
  --color-text-inverse: #f7f4f0;
  --color-text-accent: #8b7355;

  --color-border: #d9d2c7;
  --color-border-subtle: #ebe6de;
  --color-border-strong: #a39889;

  --state-success: #5a7a5e;
  --state-warning: #b8944a;
  --state-error: #9e4a4a;
  --state-info: #5a7a8b;

  --font-display: 'Cormorant Garamond', 'Noto Serif SC', Georgia, serif;
  --font-body: 'Cormorant Garamond', 'Noto Serif SC', Georgia, serif;
  --font-cn: 'Noto Serif SC', 'SimSun', 'STSong', serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1.0625rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.75rem;
  --text-4xl: 3.5rem;
  --text-5xl: 4.5rem;

  --leading-tight: 1.2;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;
  --leading-loose: 2.0;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.08em;
  --tracking-wider: 0.16em;

  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-48: 12rem;

  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-full: 9999px;

  --shadow-subtle: 0 1px 3px rgba(26, 23, 20, 0.03);
  --shadow-elevated: 0 4px 12px rgba(26, 23, 20, 0.05);
  --shadow-float: 0 12px 40px rgba(26, 23, 20, 0.12);

  --transition-fast: 200ms ease;
  --transition-base: 350ms ease;
  --transition-slow: 600ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-elegant: 800ms cubic-bezier(0.16, 1, 0.3, 1);

  --max-width-page: 1400px;
  --max-width-content: 960px;
  --max-width-narrow: 720px;
}

.dark, [data-theme="dark"] {
  --color-bg: #12110f;
  --color-bg-subtle: #1a1714;
  --color-bg-muted: #242019;
  --color-bg-elevated: #1e1b17;
  --color-bg-overlay: rgba(18, 17, 15, 0.92);

  --color-text-primary: #f0ebe4;
  --color-text-secondary: #a39889;
  --color-text-tertiary: #6b6157;
  --color-text-inverse: #1a1714;
  --color-text-accent: #c4a87a;

  --color-border: #2c2723;
  --color-border-subtle: #242019;
  --color-border-strong: #4a433c;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }
.font-cn { font-family: var(--font-cn); }
.text-serif { font-family: var(--font-display); letter-spacing: var(--tracking-tight); }

.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

[data-icon] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  background-color: currentColor;
}

/* =====================================================
   Site Header
   ===================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: background var(--transition-elegant), color var(--transition-elegant);
  font-family: var(--font-cn);
}

.site-header.scrolled {
  background: var(--color-bg);
  box-shadow: var(--shadow-subtle);
}

.site-header .nav-link {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-inverse);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  position: relative;
  padding-bottom: var(--space-1);
  text-decoration: none;
}

.site-header .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-text-inverse);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

.site-header .nav-link:hover { opacity: 1; }
.site-header .nav-link:hover::after { transform: scaleX(1); }
.site-header .nav-link[data-active="true"] { opacity: 1; }
.site-header .nav-link[data-active="true"]::after { transform: scaleX(1); }

.site-header.scrolled .nav-link { color: var(--color-text-primary); }
.site-header.scrolled .nav-link::after { background: var(--color-text-primary); }
.site-header.scrolled .header-logo { color: var(--color-text-primary) !important; }

.site-header.header-light .nav-link { color: var(--color-text-primary); }
.site-header.header-light .nav-link::after { background: var(--color-text-primary); }
.site-header.header-light .header-logo { color: var(--color-text-primary) !important; }
.site-header.header-light #mobile-menu-toggle { color: var(--color-text-primary); }

.site-header .lang-option {
  color: var(--color-text-inverse) !important;
  opacity: 0.7;
}

.site-header .lang-option.active {
  opacity: 1 !important;
  color: var(--color-text-inverse) !important;
}

.site-header.scrolled .lang-option {
  color: var(--color-text-secondary) !important;
  opacity: 0.6;
}

.site-header.scrolled .lang-option.active {
  color: var(--color-text-primary) !important;
  opacity: 1 !important;
}

.site-header.header-light .lang-option {
  color: var(--color-text-secondary) !important;
  opacity: 0.6;
}

.site-header.header-light .lang-option.active {
  color: var(--color-text-primary) !important;
  opacity: 1 !important;
}

/* =====================================================
   Site Footer
   ===================================================== */
.site-footer {
  font-family: var(--font-cn);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* =====================================================
   Hero Section
   ===================================================== */
.hero-fullscreen {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background-color: var(--color-primary-dark);
}

.hero-fullscreen .hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-fullscreen .hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}

.hero-fullscreen .hero-gradient {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    to bottom,
    rgba(13, 11, 9, 0.1) 0%,
    rgba(13, 11, 9, 0.0) 40%,
    rgba(13, 11, 9, 0.3) 70%,
    rgba(247, 244, 240, 0.95) 100%
  );
}

.hero-fullscreen .hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-8);
}

.hero-fullscreen .hero-brand {
  font-family: var(--font-cn);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: var(--weight-medium);
  color: #ffffff;
  letter-spacing: var(--tracking-wider);
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.6), 0 0 60px rgba(0, 0, 0, 0.3);
  text-wrap: balance;
  word-break: keep-all;
}

.hero-fullscreen .hero-rule {
  width: 48px;
  height: 1px;
  background: rgba(255, 255, 255, 0.6);
  margin: var(--space-6) auto;
}

.hero-fullscreen .hero-tagline {
  font-family: var(--font-cn);
  font-size: clamp(1rem, 2vw, 1.375rem);
  font-weight: var(--weight-regular);
  color: rgba(255, 255, 255, 0.92);
  letter-spacing: 0.06em;
  line-height: 2;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 0, 0, 0.2);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  opacity: 0.5;
  animation: hero-scroll-bob 2.4s ease-in-out infinite;
}

.hero-scroll-indicator svg { stroke: var(--color-text-primary); }

@keyframes hero-scroll-bob {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* =====================================================
   Featured Project Teaser
   ===================================================== */
.featured-teaser { transition: opacity var(--transition-slow); }

.featured-teaser .teaser-image {
  overflow: hidden;
  position: relative;
}

.featured-teaser .teaser-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-elegant);
}

.featured-teaser:hover .teaser-image img { transform: scale(1.02); }

.featured-teaser .teaser-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-cn);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: var(--tracking-wide);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  padding-bottom: var(--space-1);
  position: relative;
}

.featured-teaser .teaser-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-text-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.featured-teaser .teaser-link:hover { opacity: 1; }
.featured-teaser .teaser-link:hover::after { transform: scaleX(1); }
.featured-teaser .teaser-link svg { transition: transform var(--transition-base); }
.featured-teaser .teaser-link:hover svg { transform: translateX(3px); }

/* =====================================================
   Page Title Banner
   ===================================================== */
.page-banner {
  height: 220px;
  padding-top: 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 0 calc(-1 * var(--space-8));
}

.page-banner img {
  position: absolute;
  inset: -20px;
  width: calc(100% + 40px);
  height: calc(100% + 40px);
  object-fit: cover;
  object-position: center;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
  mask-image: linear-gradient(to bottom, black 60%, transparent 100%);
}

.page-banner .banner-content {
  position: relative;
  z-index: 1;
  padding: 0 var(--space-8);
}

.page-banner h1 {
  font-family: var(--font-cn);
  font-size: var(--text-4xl);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-tight);
  color: #ffffff;
  margin: 0;
  text-shadow: 0 1px 12px rgba(0,0,0,0.5), 0 0 30px rgba(0,0,0,0.2);
}

.page-banner p {
  font-family: var(--font-cn);
  font-size: var(--text-lg);
  color: rgba(255,255,255,0.92);
  max-width: var(--max-width-narrow);
  margin: var(--space-6) auto 0;
  line-height: var(--leading-relaxed);
  text-shadow: 0 1px 8px rgba(0,0,0,0.4);
}

/* =====================================================
   Swiper Carousel
   ===================================================== */
.swiper-container { position: relative; }
.swiper-viewport { overflow: hidden; }
.swiper-track {
  display: flex;
  will-change: transform;
  transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.swiper-slide {
  width: 100%;
  flex-shrink: 0;
  box-sizing: border-box;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--color-bg-muted);
  cursor: pointer;
}

.swiper-slide img {
  max-height: 480px;
  max-width: 100%;
  object-fit: contain;
}

.swiper-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border-subtle);
  background: rgba(255,255,255,0.85);
  cursor: pointer;
  font-size: 20px;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.swiper-btn:hover {
  background: rgba(255,255,255,1);
  transform: translateY(-50%) scale(1.05);
}

.swiper-btn.prev { left: 12px; }
.swiper-btn.next { right: 12px; }

.swiper-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: var(--space-6);
}

.swiper-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-subtle);
  cursor: pointer;
  transition: transform 0.3s, background 0.3s;
}

.swiper-dot.active {
  background: var(--color-text-primary);
  transform: scale(1.3);
}

.swiper-counter {
  text-align: center;
  font-family: var(--font-cn);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  letter-spacing: 0.08em;
  margin-top: var(--space-3);
}

/* =====================================================
   Lightbox
   ===================================================== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.88);
  cursor: zoom-out;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.lightbox.open {
  display: flex;
  opacity: 1;
}

.lightbox img {
  max-width: 92vw;
  max-height: 92vh;
  object-fit: contain;
  transform: scale(0.95);
  transition: transform var(--transition-slow);
}

.lightbox.open img { transform: scale(1); }

/* =====================================================
   Contact Section
   ===================================================== */
.contact-section {
  background: linear-gradient(135deg, rgba(74,103,65,0.06) 0%, rgba(139,115,85,0.06) 100%);
  padding: var(--space-32) var(--space-8) var(--space-40);
  text-align: center;
}

.contact-section p {
  font-family: var(--font-cn);
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: 2.2;
  margin: 0 0 var(--space-10);
  letter-spacing: 0.05em;
}

.contact-section .divider {
  width: 40px;
  height: 1px;
  background: var(--color-text-accent);
  margin: 0 auto var(--space-10);
}

.contact-section a {
  font-family: 'Noto Serif SC', serif;
  font-size: var(--text-2xl);
  font-weight: var(--weight-medium);
  color: #4a6741;
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: color var(--transition-slow);
}

.contact-section a:hover { color: #3a5231; }

/* =====================================================
   Fade-in Animation
   ===================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 1024px) {
  .project-grid-desktop,
  .project-grid-desktop-alt {
    display: none !important;
  }
  .project-grid-mobile,
  .project-grid-mobile-alt {
    display: block !important;
  }
  .main-nav {
    display: none !important;
  }
}

@media (min-width: 1025px) {
  .project-grid-mobile,
  .project-grid-mobile-alt {
    display: none !important;
  }
}

@media (max-width: 767px) {
  .hero-fullscreen { min-height: 500px; }
  .hero-fullscreen .hero-brand { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-fullscreen .hero-tagline { font-size: var(--text-base); }
  .page-banner { height: 180px; }
  .page-banner h1 { font-size: var(--text-3xl); }
  body { font-size: 14px; }
  [style*="font-size: 20px"] { font-size: 17px !important; }
  [style*="font-size: var(--text-xl)"] { font-size: var(--text-base) !important; }
  [style*="font-size: var(--text-2xl)"] { font-size: var(--text-xl) !important; }
  [style*="font-size: var(--text-3xl)"] { font-size: var(--text-2xl) !important; }
  [style*="font-size: var(--text-4xl)"] { font-size: var(--text-3xl) !important; }
  .swiper-slide img { max-height: 300px; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-scroll-indicator { animation: none; }
  .hero-fullscreen .hero-gradient { transition: none; }
  .featured-teaser .teaser-image img { transition: none; }
  .featured-teaser .teaser-link::after { transition: none; }
  .fade-in { transition: none; }
}