/* ── Variables ──────────────────────────────────────────────────────────── */
:root {
  --white: #FFFFFF;
  --black: #000000;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #ebebeb;
  --gray-400: #a3a3a3;
  --gray-600: #525252;
  --accent: #8B7355;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Lato', 'Helvetica Neue', Arial, sans-serif;
  --nav-h: 72px;
  --ease: all 0.35s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); color: var(--black); background: var(--white); line-height: 1.65; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: var(--font-sans); cursor: pointer; border: none; background: none; }

/* ── Navbar ─────────────────────────────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: var(--ease);
}
.navbar.scrolled { box-shadow: 0 1px 20px rgba(0,0,0,0.08); }
.nav-container {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1300px; margin: 0 auto; padding: 0 2rem; height: var(--nav-h);
}
.nav-logo { display: flex; flex-direction: column; line-height: 1.1; gap: 2px; }
.logo-main { font-family: var(--font-serif); font-size: 1.25rem; font-weight: 600; letter-spacing: 0.22em; }
.logo-sub { font-size: 0.6rem; letter-spacing: 0.18em; color: var(--gray-400); text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 1.8rem; }
.nav-link {
  font-size: 0.7rem; letter-spacing: 0.14em; font-weight: 700; color: var(--gray-600);
  transition: color 0.2s; position: relative; padding-bottom: 2px;
}
.nav-link::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 1px; background: var(--black); transform: scaleX(0); transition: transform 0.25s;
}
.nav-link:hover { color: var(--black); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--black); }
.nav-divider { width: 1px; height: 18px; background: var(--gray-200); }
.nav-social { display: flex; align-items: center; gap: 0.7rem; }
.social-icon { display: flex; color: var(--gray-600); transition: color 0.2s; }
.social-icon:hover { color: var(--black); }
.lang-toggle { display: flex; align-items: center; gap: 0.35rem; font-size: 0.68rem; letter-spacing: 0.1em; }
.lang-btn { color: var(--gray-400); font-weight: 700; transition: color 0.2s; }
.lang-btn:hover, .lang-btn.active { color: var(--black); }
.lang-toggle span { color: var(--gray-200); }
.btn-book {
  display: inline-block; padding: 0.55rem 1.5rem;
  border: 1.5px solid var(--black); font-size: 0.68rem;
  letter-spacing: 0.16em; font-weight: 700; transition: var(--ease);
}
.btn-book:hover { background: var(--black); color: var(--white); }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 4px; cursor: pointer;
}
.hamburger span { display: block; width: 24px; height: 1.5px; background: var(--black); transition: var(--ease); }
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(4.5px, 4.5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(4.5px, -4.5px); }

/* Mobile Nav */
.mobile-nav {
  display: none; flex-direction: column; gap: 0;
  background: var(--white); border-top: 1px solid var(--gray-200);
  padding: 1.5rem 2rem; padding-bottom: 2.5rem;
}
.mobile-nav.open { display: flex; }
.mobile-nav-link { 
  display: block; padding: 1rem 0; font-size: 0.85rem; 
  letter-spacing: 0.15em; font-weight: 700; 
  border-bottom: 1px solid var(--gray-100); 
}
.mobile-lang { 
  display: flex; gap: 0.8rem; align-items: center; 
  padding: 1.5rem 0; font-size: 0.8rem; letter-spacing: 0.1em; color: var(--gray-300);
}
.mobile-lang a { font-weight: 700; color: var(--gray-400); border: none; padding: 0; }
.mobile-lang a.active { color: var(--black); }

.mobile-nav .btn-book {
  margin-top: 0.5rem; text-align: center; width: 100%; display: block !important; padding: 1.2rem;
}

/* ── Flash ──────────────────────────────────────────────────────────────── */
.flash-wrap {
  position: fixed; top: calc(var(--nav-h) + 1rem); right: 1.5rem; z-index: 999;
  display: flex; flex-direction: column; gap: 0.5rem;
}
.flash {
  padding: 0.875rem 1.5rem; font-size: 0.85rem; max-width: 380px;
  animation: slideIn 0.3s ease;
}
.flash-success { background: var(--black); color: var(--white); }
.flash-error { background: #b91c1c; color: var(--white); }
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  position: relative; background: var(--gray-100); overflow: hidden;
  padding-top: var(--nav-h);
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center; background-repeat: no-repeat;
  transition: transform 8s ease;
}
.hero:hover .hero-bg { transform: scale(1.02); }
.hero-overlay { position: absolute; inset: 0; background: rgba(255,255,255,0.25); }
.hero-content { position: relative; text-align: center; padding: 2rem; max-width: 680px; }
.hero-eyebrow { font-size: 0.68rem; letter-spacing: 0.25em; text-transform: uppercase; color: var(--gray-600); margin-bottom: 1.25rem; }
.hero-title {
  font-family: var(--font-serif); font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.1; font-weight: 400; margin-bottom: 2.5rem; color: var(--black);
}
.btn-hero {
  display: inline-block; padding: 1rem 2.8rem;
  border: 1.5px solid var(--black); font-size: 0.72rem;
  letter-spacing: 0.2em; font-weight: 700; transition: var(--ease);
}
.btn-hero:hover { background: var(--black); color: var(--white); }

/* ── Service Grid 2x2 ───────────────────────────────────────────────────── */
.services-grid-2x2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  max-width: 100%;
}
.service-card {
  position: relative; overflow: hidden;
  aspect-ratio: 4/3; cursor: pointer; display: block;
}
.service-card-img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.7s cubic-bezier(0.4,0,0.2,1);
}
.service-card-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, #e8e0d8 0%, #d6ccc2 100%);
}
.service-card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0) 35%, rgba(0,0,0,0.55) 100%);
  transition: var(--ease);
}
.service-card:hover .service-card-img { transform: scale(1.06); }
.service-card:hover .service-card-overlay { background: linear-gradient(to bottom, rgba(0,0,0,0.05) 20%, rgba(0,0,0,0.65) 100%); }
.service-card-name {
  position: absolute; bottom: 0; left: 0; right: 0; text-align: center;
  padding: 1.5rem; font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem); font-style: italic; font-weight: 400;
  color: var(--white); text-shadow: 0 2px 12px rgba(0,0,0,0.3);
  transform: translateY(4px); transition: transform 0.35s ease;
}
.service-card:hover .service-card-name { transform: translateY(0); }

/* ── Feature Section ────────────────────────────────────────────────────── */
.feature-section {
  display: grid; grid-template-columns: 1fr 1fr; min-height: 520px;
}
.feature-img-wrap { overflow: hidden; }
.feature-img { width: 100%; height: 100%; object-fit: cover; min-height: 400px; transition: transform 0.7s ease; }
.feature-img-wrap:hover .feature-img { transform: scale(1.03); }
.feature-img-placeholder { width: 100%; height: 100%; min-height: 400px; background: linear-gradient(135deg, #f0e8e0 0%, #e0d0c0 100%); }
.feature-content { padding: clamp(2rem, 6vw, 5rem); display: flex; flex-direction: column; justify-content: center; }
.feature-eyebrow { font-size: 0.65rem; letter-spacing: 0.22em; color: var(--gray-400); text-transform: uppercase; margin-bottom: 1rem; }
.feature-title { font-family: var(--font-serif); font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 400; margin-bottom: 1.5rem; line-height: 1.2; }
.feature-text { color: var(--gray-600); line-height: 1.85; margin-bottom: 2rem; font-size: 0.95rem; }

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn-outline {
  display: inline-block; padding: 0.8rem 2.2rem;
  border: 1.5px solid var(--black); font-size: 0.7rem;
  letter-spacing: 0.16em; font-weight: 700; transition: var(--ease);
}
.btn-outline:hover { background: var(--black); color: var(--white); }
.btn-outline-white {
  display: inline-block; padding: 1rem 2.5rem;
  border: 1.5px solid var(--white); font-size: 0.72rem;
  letter-spacing: 0.18em; font-weight: 700; color: var(--white); transition: var(--ease);
}
.btn-outline-white:hover { background: var(--white); color: var(--black); }

/* ── Gallery ────────────────────────────────────────────────────────────── */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; }
.gallery-item { aspect-ratio: 1; overflow: hidden; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.gallery-item:hover img { transform: scale(1.08); }

/* ── Section Commons ────────────────────────────────────────────────────── */
.section { padding: 6rem 2rem; }
.bg-light { background: var(--gray-50); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.section-eyebrow { font-size: 0.65rem; letter-spacing: 0.25em; text-transform: uppercase; color: var(--gray-400); margin-bottom: 0.75rem; text-align: center; }
.section-title { font-family: var(--font-serif); font-size: clamp(2rem, 4vw, 3rem); font-weight: 400; text-align: center; margin-bottom: 3rem; }

/* ── CTA Section ────────────────────────────────────────────────────────── */
.cta-section { background: var(--gray-100); padding: 6rem 2rem; text-align: center; }
.cta-title { font-family: var(--font-serif); font-size: clamp(2rem, 4vw, 3rem); font-weight: 400; margin: 1rem 0 1.5rem; }
.cta-text { color: var(--gray-600); max-width: 500px; margin: 0 auto 2rem; font-size: 0.95rem; }
.btn-cta {
  display: inline-block; padding: 1rem 2.8rem;
  border: 1.5px solid var(--black); font-size: 0.72rem;
  letter-spacing: 0.18em; font-weight: 700; transition: var(--ease);
}
.btn-cta:hover { background: var(--black); color: var(--white); }

/* ── Page Header ────────────────────────────────────────────────────────── */
.page-header { padding: calc(var(--nav-h) + 3rem) 2rem 3rem; text-align: center; background: var(--white); }
.page-title { font-family: var(--font-serif); font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 400; }

/* ── Services Detail ────────────────────────────────────────────────────── */
.service-details { padding: 4rem 0; }
.detail-block { padding: 4rem 2rem; max-width: 900px; margin: 0 auto; border-bottom: 1px solid var(--gray-200); }
.detail-block:last-child { border-bottom: none; }
.detail-header { margin-bottom: 2rem; }
.detail-title { font-family: var(--font-serif); font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 400; font-style: italic; }
.detail-divider { width: 40px; height: 1px; background: var(--black); margin-top: 0.75rem; }
.detail-list { display: flex; flex-direction: column; gap: 0; }
.detail-item {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 1.25rem 0; border-bottom: 1px solid var(--gray-100);
  transition: background 0.2s;
}
.detail-item:hover { background: var(--gray-50); padding-left: 0.75rem; padding-right: 0.75rem; margin: 0 -0.75rem; }
.detail-item:last-child { border-bottom: none; }
.detail-item-name { font-size: 1rem; font-weight: 400; margin-bottom: 0.3rem; }
.detail-item-desc { font-size: 0.875rem; color: var(--gray-600); margin-bottom: 0.3rem; }
.detail-item-duration { font-size: 0.75rem; color: var(--gray-400); letter-spacing: 0.05em; }
.detail-item-price { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 600; white-space: nowrap; margin-left: 2rem; color: var(--black); }

/* ── Contact ────────────────────────────────────────────────────────────── */
.contact-section { padding: 4rem 2rem 6rem; }
.contact-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 5rem; max-width: 1100px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.form-group { margin-bottom: 1.5rem; display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.72rem; letter-spacing: 0.1em; font-weight: 700; color: var(--gray-600); text-transform: uppercase; }
.form-group input, .form-group textarea, .form-group select {
  border: 1px solid var(--gray-200); padding: 0.85rem 1rem;
  font-family: var(--font-sans); font-size: 0.95rem; outline: none;
  transition: border-color 0.2s; background: var(--white); color: var(--black);
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--black); }
.form-group textarea { resize: vertical; }
.btn-submit {
  display: block; width: 100%; padding: 1rem;
  background: var(--black); color: var(--white);
  font-size: 0.72rem; letter-spacing: 0.2em; font-weight: 700;
  transition: var(--ease); cursor: pointer;
}
.btn-submit:hover { background: var(--gray-600); }
.btn-submit:disabled { opacity: 0.5; }
.form-success { margin-top: 1rem; padding: 1rem; background: var(--gray-50); border-left: 3px solid var(--black); font-size: 0.9rem; }
.contact-info { padding-top: 0.5rem; }
.info-block { margin-bottom: 2.5rem; }
.info-title { font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gray-400); margin-bottom: 0.75rem; font-weight: 700; }
.info-block p { color: var(--gray-600); font-size: 0.9rem; line-height: 1.7; }

/* ── Footer ─────────────────────────────────────────────────────────────── */
.footer {}
.footer-cta { background: var(--black); color: var(--white); padding: 5rem 2rem; text-align: center; }
.footer-cta-label { font-size: 0.65rem; letter-spacing: 0.25em; text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 1.5rem; }
.footer-cta-title { font-family: var(--font-serif); font-size: clamp(2rem, 4vw, 3rem); font-weight: 400; margin-bottom: 2.5rem; }
.footer-bottom {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 3rem;
  max-width: 1100px; margin: 0 auto; padding: 4rem 2rem;
  border-top: 1px solid var(--gray-200);
}
.footer-logo { font-family: var(--font-serif); font-size: 1.1rem; font-weight: 600; letter-spacing: 0.2em; margin-bottom: 1rem; }
.footer-col p { font-size: 0.875rem; color: var(--gray-600); line-height: 1.8; }
.footer-heading { font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gray-400); margin-bottom: 0.75rem; font-weight: 700; }
.footer-col a { display: block; font-size: 0.875rem; color: var(--gray-600); margin-bottom: 0.4rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--black); }
.footer-copy { text-align: center; padding: 1.5rem 2rem; font-size: 0.75rem; color: var(--gray-400); border-top: 1px solid var(--gray-100); }

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .services-grid-2x2 { grid-template-columns: 1fr; }
  .feature-section { grid-template-columns: 1fr; }
  .feature-img { min-height: 300px; }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-bottom { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-block { padding: 3rem 1.5rem; }
  .footer-bottom { grid-template-columns: 1fr; gap: 2rem; }
}

/* ── Category Tabs (fallback khi chưa có ảnh) ───────────────────────────── */
.category-tabs {
  display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center;
  padding: 2.5rem 2rem; border-bottom: 1px solid var(--gray-200);
  max-width: 900px; margin: 0 auto;
}
.cat-tab {
  padding: 0.65rem 2rem; border: 1.5px solid var(--gray-200);
  font-size: 0.78rem; letter-spacing: 0.12em; font-weight: 700;
  cursor: pointer; transition: var(--ease); background: none;
  font-family: var(--font-sans);
}
.cat-tab:hover { border-color: var(--black); background: var(--black); color: var(--white); }