/* ========== Variables ========== */
:root {
  --gold: #C5A663;
  --gold-light: #D4BA82;
  --navy: #1B2A4A;
  --navy-light: #2A3D66;
  --white: #FFFFFF;
  --off-white: #FAFAF8;
  --gray-100: #F5F5F3;
  --gray-200: #E8E6E3;
  --gray-400: #A09E9A;
  --gray-600: #6B6966;
  --gray-800: #3A3836;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1100px;
  --section-padding: 100px 0;
}

/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 60px; }
body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ========== Nav ========== */
.top-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  transition: transform 0.3s;
}
.top-nav.hidden { transform: translateY(-100%); }
.nav-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
  height: 60px; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo-link { display: flex; align-items: center; gap: 8px; }
.nav-logo-img { height: 40px; width: auto; object-fit: contain; }
.nav-logo-text {
  font-family: var(--font-sans); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 1.5px; line-height: 1.3; color: var(--gray-800);
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: 0.85rem; color: var(--gray-600); letter-spacing: 0.5px;
  transition: color 0.2s; position: relative;
}
.nav-links a:hover { color: var(--navy); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 1.5px; background: var(--gold); transition: width 0.3s;
}
.nav-links a:hover::after { width: 100%; }

/* Burger menu (hidden on desktop) */
.nav-burger {
  display: none; background: none; border: none; cursor: pointer;
  padding: 4px; flex-direction: column; gap: 5px;
}
.nav-burger span {
  display: block; width: 22px; height: 1.5px; background: var(--gray-800);
  transition: all 0.3s;
}
.nav-burger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ========== Hero ========== */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; background: var(--white); padding: 60px 24px 0;
  position: relative; overflow: hidden;
}
.hero-wall {
  position: absolute; inset: 0; z-index: 0;
  opacity: 0.07;
  pointer-events: none;
  display: flex; flex-direction: column; justify-content: center; gap: 8px;
}
.wall-track {
  display: flex; gap: 8px; flex-shrink: 0;
  width: max-content;
  animation: wallScroll 86s linear infinite;
}
.wall-track-2 { animation-direction: reverse; animation-duration: 107s; }
.wall-track-3 { animation-duration: 72s; }
.wall-track img {
  height: 160px; width: auto; border-radius: 6px; object-fit: cover; flex-shrink: 0;
}
@keyframes wallScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.hero-content { max-width: 700px; position: relative; z-index: 1; }
.hero-title {
  font-family: var(--font-serif); font-size: 2.6rem; font-weight: 400;
  color: var(--navy); letter-spacing: 2px; margin-bottom: 20px;
  opacity: 0; transform: translateY(20px); animation: fadeUp 0.8s 0.3s forwards;
}
.hero-tagline {
  font-size: 1rem; color: var(--gray-600); letter-spacing: 1px; line-height: 1.8;
  opacity: 0; transform: translateY(20px); animation: fadeUp 0.8s 0.6s forwards;
}
.hero-keywords {
  margin-top: 40px; display: flex; align-items: center; justify-content: center; gap: 16px;
  opacity: 0; animation: fadeUp 0.8s 0.8s forwards;
}
.hero-keywords span {
  font-family: var(--font-serif); font-size: 0.9rem; color: var(--gold);
  letter-spacing: 3px; font-weight: 600;
}
.hero-dot {
  width: 4px; height: 4px; border-radius: 50%; background: var(--gold); display: inline-block;
}
.hero-scroll-hint {
  margin-top: 50px; opacity: 0; animation: fadeUp 0.8s 1s forwards;
}
.hero-scroll-hint span {
  font-size: 0.75rem; color: var(--gray-400); letter-spacing: 2px; text-transform: uppercase;
}
.scroll-arrow {
  width: 1px; height: 40px; background: var(--gold); margin: 12px auto 0;
  animation: scrollPulse 2s infinite;
}
@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ========== Shared ========== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section-title {
  font-family: var(--font-serif); font-size: 1.8rem; font-weight: 400;
  text-align: center; color: var(--navy); margin-bottom: 16px; letter-spacing: 2px;
}

/* ========== Philosophy ========== */
.philosophy-section {
  padding: 80px 0; background: var(--off-white);
}
.philosophy-content {
  max-width: 780px; margin: 0 auto; position: relative; padding-left: 28px;
}
.philosophy-accent {
  position: absolute; left: 0; top: 0; width: 3px; height: 100%;
  background: linear-gradient(to bottom, var(--gold), var(--gold-light));
}
.philosophy-text {
  font-family: var(--font-serif); font-size: 1.05rem; color: var(--gray-800);
  line-height: 2.2; letter-spacing: 0.3px;
}

/* ========== Services (Two Capabilities) ========== */
.services-section { padding: 64px 0; background: var(--white); }
.capabilities-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 32px;
}
.capability-card {
  padding: 32px 32px; background: var(--off-white);
  transition: transform 0.3s, box-shadow 0.3s;
  display: flex; flex-direction: column;
}
.capability-card:hover {
  transform: translateY(-4px); box-shadow: 0 16px 48px rgba(0,0,0,0.06);
}
.capability-icon { margin-bottom: 12px; }
.capability-icon svg { width: 40px; height: 40px; color: var(--gold); }
.capability-card h3 {
  font-family: var(--font-serif); font-size: 1.25rem; color: var(--navy);
  margin-bottom: 12px; font-weight: 600;
}
.capability-desc {
  font-size: 0.9rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 16px;
}
.capability-steps {
  list-style: none; padding: 0; margin: 0 0 16px 0;
  display: flex; flex-direction: column; gap: 6px; flex-grow: 1;
}
.capability-steps li {
  font-size: 0.88rem; color: var(--navy); letter-spacing: 0.5px;
  padding-left: 20px; position: relative;
}
.capability-steps li::before {
  content: ''; position: absolute; left: 0; top: 50%;
  width: 8px; height: 1px; background: var(--gold);
}
.capability-motto {
  font-family: var(--font-serif); font-size: 0.85rem; color: var(--gold);
  font-style: italic; letter-spacing: 0.5px; margin-top: auto;
  padding-top: 12px; border-top: 1px solid var(--gray-200);
}

/* ========== Cases ========== */
.cases-section { padding: var(--section-padding); background: var(--white); }
.cases-subtitle {
  font-family: var(--font-serif);
  font-size: 1.25rem; font-weight: 500; color: var(--navy);
  margin-top: 48px; margin-bottom: -32px;
  border-left: 3px solid var(--gold); padding-left: 12px;
  letter-spacing: 0.02em;
}
.cases-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 48px;
}
.cases-grid-3 {
  grid-template-columns: 1fr 1fr 1fr;
}
.case-card {
  position: relative; overflow: hidden; cursor: default;
  aspect-ratio: 4/3;
}
.case-large { grid-row: span 2; aspect-ratio: auto; }
.case-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s;
}
.case-card:hover img { transform: scale(1.04); }
.case-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 24px; background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: var(--white);
}
.case-overlay h3 {
  font-family: var(--font-serif); font-size: 1rem; margin-bottom: 4px; font-weight: 600;
}
.case-overlay p { font-size: 0.8rem; opacity: 0.85; }

/* ========== Clients ========== */
.clients-section { padding: 60px 0; background: var(--navy); }
.clients-section .section-title { color: var(--white); }
.clients-grid {
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 32px 40px;
  margin-top: 40px; max-width: 900px; margin-left: auto; margin-right: auto;
}
.client-logo {
  height: 36px; width: auto; opacity: 0.5; transition: opacity 0.3s;
  filter: brightness(0) invert(1);
}
.client-logo:hover { opacity: 0.9; }

/* ========== Brands (collapsible) ========== */
.brands-section { padding: var(--section-padding); background: var(--white); }
.brands-intro {
  text-align: center; font-size: 0.95rem; color: var(--gray-600);
  margin-bottom: 48px; letter-spacing: 0.5px;
}
.brand-block { margin-bottom: 32px; }
.brand-banner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  background: var(--off-white); overflow: hidden;
}
.brand-banner-img {
  position: relative; aspect-ratio: 4/3; overflow: hidden;
}
.brand-banner-img > img:first-child {
  width: 100%; height: 100%; object-fit: cover;
}
.brand-banner-img--dark > img:first-child {
  object-fit: cover;
}
.brand-banner-logo {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  height: auto; width: 40%; max-width: 240px; object-fit: contain;
  background: rgba(255,255,255,0.25); padding: 12px 16px; border-radius: 8px; backdrop-filter: blur(2px);
}
.brand-banner-info {
  padding: 40px 36px; display: flex; flex-direction: column; justify-content: center;
}
.brand-banner-info h3 {
  font-family: var(--font-serif); font-size: 1.4rem; color: var(--navy);
  margin-bottom: 8px; font-weight: 600;
}
.brand-one-liner {
  font-size: 0.8rem; color: var(--gold); letter-spacing: 0.5px; margin-bottom: 12px;
}
.brand-desc-short {
  font-size: 0.9rem; color: var(--gray-600); line-height: 1.8; margin-bottom: 20px;
}
.expand-btn {
  align-self: flex-start; font-family: var(--font-serif); font-size: 0.85rem;
  color: var(--gold); background: none; border: none; cursor: pointer;
  padding: 0; letter-spacing: 0.5px; transition: color 0.2s;
}
.expand-btn:hover { color: var(--navy); }

/* Brand detail panel (collapsed) */
.brand-detail-panel {
  max-height: 0; overflow: hidden; transition: max-height 0.5s ease;
  background: var(--white);
}
.brand-detail-panel.open { max-height: 600px; }
.series-scroll-wrap { padding: 32px 36px; }
.detail-subtitle {
  font-family: var(--font-serif); font-size: 1.1rem; color: var(--navy);
  margin-bottom: 20px; font-weight: 400;
}

/* Horizontal scroll */
.series-scroll {
  display: flex; gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory;
  padding-bottom: 12px; -webkit-overflow-scrolling: touch;
}
.series-scroll::-webkit-scrollbar { height: 4px; }
.series-scroll::-webkit-scrollbar-track { background: var(--gray-100); }
.series-scroll::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 2px; }
.series-card {
  flex: 0 0 200px; scroll-snap-align: start;
}
.series-card img {
  width: 200px; height: 200px; object-fit: cover; background: var(--gray-100);
}
#sh-detail .series-card img {
  object-fit: contain; background: #fff; padding: 4px;
}
.series-card span {
  display: block; padding: 8px 4px; font-size: 0.8rem; color: var(--navy);
  text-align: center; white-space: nowrap;
}

/* ========== Contact ========== */
.contact-section {
  padding: var(--section-padding); background: var(--navy); color: var(--white);
}
.contact-section .section-title { color: var(--white); }
.contact-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px;
  text-align: center; margin-top: 48px;
}
.contact-card h3 {
  font-family: var(--font-serif); font-size: 1rem; color: var(--gold);
  margin-bottom: 12px; letter-spacing: 1px;
}
.contact-card p { font-size: 0.9rem; color: rgba(255,255,255,0.7); line-height: 1.8; }
.contact-card a { color: rgba(255,255,255,0.7); transition: color 0.2s; }
.contact-card a:hover { color: var(--gold); }
.contact-en { font-family: var(--font-serif); font-style: italic; }

/* ========== Footer ========== */
.footer {
  padding: 24px; text-align: center; background: #141E33;
  color: var(--gray-400); font-size: 0.8rem; letter-spacing: 0.5px;
}

/* ========== Animations ========== */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ========== Responsive ========== */
@media (max-width: 900px) {
  /* Nav: hide links, show burger */
  .nav-links {
    display: none; flex-direction: column; gap: 0;
    position: absolute; top: 60px; left: 0; right: 0;
    background: rgba(255,255,255,0.98); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    padding: 8px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 14px 24px; font-size: 0.9rem;
    border-bottom: 1px solid var(--gray-100);
  }
  .nav-links a::after { display: none; }
  .nav-burger { display: flex; }

  /* Hero */
  .hero-title { font-size: 1.8rem; letter-spacing: 1px; }
  .hero-keywords { margin-top: 28px; }
  .hero-scroll-hint { margin-top: 32px; }

  /* Philosophy */
  .philosophy-section { padding: 48px 0; }
  .philosophy-content { padding-left: 18px; }
  .philosophy-text { font-size: 0.92rem; line-height: 1.9; }

  /* Services */
  .services-section { padding: 48px 0; }
  .section-title { font-size: 1.4rem; }
  .capabilities-grid { grid-template-columns: 1fr; gap: 16px; margin-top: 24px; }
  .capability-card { padding: 24px 20px; }
  .capability-card h3 { font-size: 1.1rem; }

  /* Brands */
  .brands-section { padding: 48px 0; }
  .brands-intro { margin-bottom: 32px; }
  .brand-banner { grid-template-columns: 1fr; }
  .brand-banner-img { aspect-ratio: 16/9; }
  .brand-banner-info { padding: 24px 20px; }
  .brand-banner-info h3 { font-size: 1.2rem; }

  /* Cases: keep 2-col for hotel, 2-col for corporate */
  .cases-section { padding: 48px 0; }
  .cases-grid { grid-template-columns: 1fr 1fr; }
  .cases-grid-3 { grid-template-columns: 1fr 1fr; }
  .cases-subtitle { margin-top: 32px; margin-bottom: -24px; font-size: 1.1rem; }
  .case-large { grid-row: span 1; aspect-ratio: 4/3; }

  /* Clients */
  .clients-section { padding: 40px 0; }
  .clients-grid { gap: 20px 28px; }
  .client-logo { height: 28px; }

  /* Contact */
  .contact-section { padding: 48px 0; }
  .contact-grid { grid-template-columns: 1fr; gap: 28px; margin-top: 32px; }
  .contact-card a { word-break: break-all; }

  :root { --section-padding: 48px 0; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.5rem; }
  .hero-tagline { font-size: 0.85rem; }
  .hero-keywords { gap: 10px; }
  .hero-keywords span { font-size: 0.75rem; letter-spacing: 2px; }
  .section-title { font-size: 1.25rem; }
  .cases-grid { grid-template-columns: 1fr; }
  .cases-grid-3 { grid-template-columns: 1fr 1fr; }
  .case-card { aspect-ratio: 3/2; }
  .series-card { flex: 0 0 160px; }
  .series-card img { width: 160px; height: 160px; }
  .client-name { padding: 10px 16px; font-size: 0.85rem; }
  .philosophy-text { font-size: 0.88rem; line-height: 1.85; }
  .brand-one-liner { font-size: 0.75rem; }
  .brand-desc-short { font-size: 0.85rem; line-height: 1.7; }
}