/* =============================================================
   Biến gốc — chép chính xác từ tessen-demo.web.app
   ============================================================= */
:root {
  --color-primary: #0b3d4c;
  --color-primary-dark: #072a35;
  --color-primary-light: #14586d;
  --color-accent: #e87c3e;
  --color-accent-dark: #d4652a;
  --color-accent-light: #f09a64;
  --color-cream: #fff8f0;
  --color-warm-white: #fffdfb;
  --color-white: #fff;
  --color-dark: #1a1a1a;
  --color-gray: #6b7280;
  --color-gray-light: #e5e7eb;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-heading: 'Playfair Display', Georgia, serif;
  --radius-btn: 8px;
  --radius-card: 16px;
  --radius-hero: 40px;
}

html {
  scroll-behavior: smooth;
  width: 100%;
  overflow-x: hidden;
}
body {
  font-family: var(--font-body);
  color: var(--color-dark);
  background: #fff;
  overflow-x: hidden;
}

/* =============================================================
   Buttons
   ============================================================= */
.btn {
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-body);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-btn);
  cursor: pointer;
  border: 2px solid transparent;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
}
.btn-primary { background-color: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background-color: var(--color-primary-light); border-color: var(--color-primary-light); transform: translateY(-2px); box-shadow: 0 8px 25px #0b3d4c4d; }
.btn-outline-white { color: #fff; background-color: transparent; border-color: #fff; }
.btn-outline-white:hover { color: var(--color-primary); background-color: #fff; transform: translateY(-2px); }
.btn-accent { background-color: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.btn-accent:hover { background-color: var(--color-accent-dark); transform: translateY(-2px); box-shadow: 0 8px 25px #e87c3e4d; }

/* =============================================================
   Section helpers
   ============================================================= */
.section-label {
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-body);
  margin-bottom: 0.75rem;
  display: inline-block;
}
.section-title {
  font-family: var(--font-heading);
  color: var(--color-primary-dark);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
}

/* =============================================================
   Header / Nav
   ============================================================= */
.site-header {
  z-index: 100;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  background: #0b3d4c2e;
  padding: 1rem 2rem;
  transition: all 0.4s;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}
.site-header.scrolled {
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  background: #fffffff2;
  padding: 0.5rem 2rem;
  box-shadow: 0 2px 20px #00000014;
}
.site-header.scrolled .nav-link { color: var(--color-dark); }
.site-header.scrolled .nav-link:hover { color: var(--color-accent); }
.header-logo { filter: brightness(0) invert(); transition: filter 0.4s, height 0.4s; }
.site-header.scrolled .header-logo { filter: none; height: 3rem; }
.footer-logo { filter: brightness(0) invert(); }

.nav-link {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  transition: color 0.3s;
  position: relative;
}
.nav-link:hover { color: var(--color-accent-light); }
.nav-link::after {
  content: '';
  background: var(--color-accent);
  width: 0;
  height: 2px;
  transition: width 0.3s;
  position: absolute;
  bottom: -4px;
  left: 0;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
/* Khi mục được chọn: chữ cùng màu với gạch chân (accent) — cả 2 trạng thái header */
.nav-link.active,
.site-header.scrolled .nav-link.active { color: var(--color-accent); }

.nav-dropdown-wrap { position: relative; }
.nav-dropdown-trigger { cursor: pointer; background: none; border: none; align-items: center; padding: 0; display: inline-flex; }
.nav-dropdown-trigger::after { display: none; }
.nav-dropdown-trigger.active::after { width: 100%; display: block; }
.nav-dropdown-wrap:hover .nav-dropdown-chevron { transform: rotate(180deg); }
.nav-dropdown-wrap:hover .nav-dropdown-trigger::after { width: 100%; display: block; }
.nav-dropdown-wrap:hover .nav-dropdown-trigger { color: var(--color-accent); }
.nav-dropdown-menu {
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  z-index: 50;
  background: #fffffff7;
  border: 1px solid #0000000f;
  border-radius: 12px;
  min-width: 170px;
  padding: 6px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translate(-50%) translateY(-8px);
  box-shadow: 0 12px 40px #0000001a, 0 2px 8px #0000000a;
}
.nav-dropdown-wrap:hover .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translate(-50%) translateY(0); }
.nav-dropdown-item {
  color: var(--color-dark);
  text-transform: none;
  letter-spacing: 0;
  white-space: nowrap;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
  display: block;
}
.nav-dropdown-item:hover { background: var(--color-cream); color: var(--color-primary); }
.nav-dropdown-item.active { background: var(--color-cream); color: var(--color-accent); font-weight: 600; }

/* Language switcher */
.lang-switcher { position: relative; }
.lang-trigger {
  color: #fff;
  letter-spacing: 0.08em;
  cursor: pointer;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  background: #ffffff14;
  border: 1.5px solid #ffffff4d;
  border-radius: 8px;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  transition: all 0.3s;
  display: flex;
}
.lang-trigger:hover { background: #ffffff26; border-color: #ffffff80; }
.site-header.scrolled .lang-trigger { color: var(--color-dark); -webkit-backdrop-filter: none; backdrop-filter: none; background: #0000000a; border-color: #00000026; }
.site-header.scrolled .lang-trigger:hover { background: #00000014; border-color: #00000040; }
.lang-globe { width: 15px; height: 15px; }
.lang-chevron { width: 12px; height: 12px; transition: transform 0.3s; }
.lang-switcher.open .lang-chevron { transform: rotate(180deg); }
.lang-dropdown {
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  z-index: 50;
  background: #fffffff2;
  border: 1px solid #00000014;
  border-radius: 12px;
  min-width: 160px;
  padding: 6px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  transform: translateY(-8px);
  box-shadow: 0 12px 40px #0000001f, 0 2px 8px #0000000f;
}
.lang-switcher.open .lang-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-option {
  width: 100%;
  color: var(--color-dark);
  cursor: pointer;
  background: none;
  border: none;
  border-radius: 8px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: background 0.2s;
  display: flex;
}
.lang-option:hover,
.lang-option.active { background: var(--color-cream); }
.lang-flag { font-size: 1rem; }
.lang-name { flex: 1; text-align: left; }
.lang-check { width: 16px; height: 16px; color: var(--color-accent); opacity: 0; transition: opacity 0.2s; }
.lang-option.active .lang-check { opacity: 1; }

/* Book button (giống bản gốc — KHÔNG đặt display để 'hidden' của Tailwind ẩn được trên mobile) */
.book-btn {
  background: var(--color-primary);
  color: #fff;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-btn);
  border: 2px solid var(--color-primary);
  padding: 0.5rem 1.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  transition: all 0.3s;
}
.book-btn:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-1px);
}

/* Hamburger */
.hamburger {
  cursor: pointer;
  z-index: 201;
  background: none;
  border: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  display: flex;
}
.hamburger span { background: #fff; border-radius: 2px; width: 24px; height: 2px; transition: all 0.3s; }
.site-header.scrolled .hamburger span { background: var(--color-dark); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =============================================================
   Mobile menu
   ============================================================= */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--color-primary-dark);
  color: #fff;
  flex-direction: column;
  /* Đóng hẳn -> display:none (không chiếm chỗ off-screen -> không tràn ngang) */
  display: none;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.mobile-menu.rendered { display: flex; }
.mobile-menu.open { transform: translateX(0); }
.mobile-menu__header { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.25rem; }
.mobile-menu__close { background: none; border: none; color: #fff; cursor: pointer; }
.mobile-menu__nav { flex: 1; overflow-y: auto; padding: 1rem 1.5rem; display: flex; flex-direction: column; }
.mobile-menu__link { color: #fff; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.95rem; font-weight: 600; padding: 0.85rem 0; }
.mobile-menu__link:hover { color: var(--color-accent-light); }
.mobile-menu__divider { height: 1px; background: #ffffff1a; margin: 0.5rem 0; }
.mobile-menu__accordion-trigger {
  width: 100%; background: none; border: none; color: #fff; cursor: pointer;
  text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.95rem; font-weight: 600;
  padding: 0.85rem 0; display: flex; align-items: center; justify-content: space-between;
}
.mobile-menu__accordion-chevron { transition: transform 0.3s; }
.mobile-menu__accordion.open .mobile-menu__accordion-chevron { transform: rotate(180deg); }
.mobile-menu__accordion-body { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.mobile-menu__accordion.open .mobile-menu__accordion-body { max-height: 200px; }
.mobile-menu__accordion-inner { padding-left: 1rem; display: flex; flex-direction: column; }
.mobile-menu__sub-link { color: #ffffffcc; font-size: 0.9rem; padding: 0.6rem 0; }
.mobile-menu__sub-link:hover { color: var(--color-accent-light); }
.mobile-menu__footer { padding: 1.25rem 1.5rem; }
.lang-toggle-mobile { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.lang-toggle-option { flex: 1; padding: 0.6rem; border: 1px solid #ffffff33; background: none; color: #fff; border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 0.85rem; }
.lang-toggle-option.active { background: var(--color-accent); border-color: var(--color-accent); }
.mobile-menu__book-btn { display: block; text-align: center; background: var(--color-accent); color: #fff; padding: 0.85rem; border-radius: var(--radius-btn); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.85rem; }

/* =============================================================
   Hero
   ============================================================= */
.hero-section {
  border-radius: 0 0 var(--radius-hero) var(--radius-hero);
  width: 100%;
  height: 85vh;
  min-height: 500px;
  position: relative;
  overflow: hidden;
}
.hero-slide { opacity: 0; transition: opacity 1s ease-in-out; position: absolute; inset: 0; }
.hero-slide.active { opacity: 1; }
.hero-slide img { object-fit: cover; width: 100%; height: 100%; }
.hero-overlay { background: linear-gradient(#0003, #0000001a, #0009); position: absolute; inset: 0; }
.hero-dots { gap: 0.75rem; display: flex; }
.hero-dot { cursor: pointer; background-color: #fff6; border-radius: 2px; width: 40px; height: 4px; transition: all 0.3s; }
.hero-dot.active { background-color: var(--color-accent); width: 50px; }

/* =============================================================
   Bento (floors / host story images)
   ============================================================= */
.bento-grid { grid-template-rows: auto; grid-template-columns: repeat(12, 1fr); gap: 1.25rem; display: grid; }
.bento-card { border-radius: var(--radius-card); transition: transform 0.4s, box-shadow 0.4s; overflow: hidden; }
.bento-card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px #00000014; }
.bento-card img { object-fit: cover; width: 100%; height: 100%; transition: transform 0.6s; }
.bento-card:hover img { transform: scale(1.05); }

/* =============================================================
   Services
   ============================================================= */
.service-card { border: 1px solid var(--color-gray-light); border-radius: var(--radius-card); text-align: center; background: #fff; padding: 2rem 1.5rem; transition: transform 0.4s, box-shadow 0.4s, border-color 0.4s; }
.service-card:hover { border-color: transparent; transform: translateY(-6px); box-shadow: 0 20px 40px #0b3d4c14; }
.service-icon { background: var(--color-cream); width: 64px; height: 64px; color: var(--color-accent); border-radius: 50%; justify-content: center; align-items: center; margin: 0 auto 1.25rem; transition: background 0.3s, color 0.3s; display: flex; }
.service-card:hover .service-icon { background: var(--color-accent); color: #fff; }
.service-icon svg { width: 28px; height: 28px; }
.service-card h3 { font-family: var(--font-heading); color: var(--color-primary-dark); margin-bottom: 0.5rem; font-size: 1.15rem; }
.service-card p { color: var(--color-gray); font-size: 0.85rem; line-height: 1.6; }

/* =============================================================
   Explore video player
   ============================================================= */
.custom-video-player { border-radius: var(--radius-card); cursor: pointer; position: relative; overflow: hidden; }
.custom-video { object-fit: cover; border-radius: var(--radius-card); width: 100%; height: 18rem; display: block; }
.video-overlay { border-radius: var(--radius-card); background: #0003; justify-content: center; align-items: center; transition: opacity 0.4s; display: flex; position: absolute; inset: 0; }
.video-overlay.hidden { opacity: 0; pointer-events: none; }
.play-button { cursor: pointer; background: #ffffffe6; border: none; border-radius: 50%; justify-content: center; align-items: center; width: 72px; height: 72px; transition: all 0.3s; display: flex; box-shadow: 0 8px 30px #0003; }
.play-button:hover { background: #fff; transform: scale(1.1); }
.play-button svg { width: 24px; height: 24px; fill: var(--color-primary); margin-left: 3px; }
.fullscreen-btn { z-index: 10; cursor: pointer; color: #fff; -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); background: #00000080; border: none; border-radius: 8px; justify-content: center; align-items: center; width: 40px; height: 40px; transition: all 0.3s; display: flex; position: absolute; bottom: 12px; right: 12px; }
.fullscreen-btn:hover { background: #000000b3; transform: scale(1.1); }
.fullscreen-btn svg { width: 18px; height: 18px; }

/* =============================================================
   Final CTA
   ============================================================= */
.final-cta { border-radius: var(--radius-card); background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #fff; text-align: center; padding: 4rem 2rem; position: relative; overflow: hidden; }
.final-cta::before, .final-cta::after { content: ''; pointer-events: none; border-radius: 50%; position: absolute; }
.final-cta::before { background: radial-gradient(circle, #e87c3e40, #0000 70%); width: 320px; height: 320px; top: -80px; right: -80px; }
.final-cta::after { background: radial-gradient(circle, #e87c3e2e, #0000 70%); width: 260px; height: 260px; bottom: -100px; left: -60px; }
.final-cta .section-label { color: var(--color-accent-light); }
.final-cta h2 { color: #fff; }

/* =============================================================
   Footer
   ============================================================= */
.site-footer { background: var(--color-primary-dark); color: #ffffffb3; }
.site-footer a { color: #ffffffb3; transition: color 0.3s; }
.site-footer a:hover { color: #fff; }
.footer-heading { color: #fff; font-family: var(--font-body); margin-bottom: 1.25rem; font-size: 0.95rem; font-weight: 700; }

/* =============================================================
   Responsive
   ============================================================= */
@media (max-width: 1023px) {
  .hamburger { display: flex; }
}
@media (min-width: 768px) {
  .custom-video { height: 24rem; }
}
@media (max-width: 767px) {
  .hero-section { border-radius: 0 0 24px 24px; height: 70vh; }
  .site-header { padding: 0.75rem 1rem; }
}

/* AOS fallback nếu JS chưa chạy: vẫn hiển thị nội dung */
.no-js [data-aos] { opacity: 1 !important; transform: none !important; }

/* Explore video (Plyr) — bo góc + đổ bóng + đổi màu chủ đạo sang accent */
.explore-video{border-radius:var(--radius-card);overflow:hidden;box-shadow:0 20px 50px rgba(11,61,76,.18);--plyr-color-main:var(--color-accent);--plyr-video-background:var(--color-primary-dark);--plyr-badge-background:var(--color-primary);--plyr-video-control-color:#fff}
.explore-video .plyr{border-radius:var(--radius-card)}

/* =============================================================
   Host-story collage — 3 ảnh chồng lớp hiện đại + mở lightbox
   ============================================================= */
.host-collage{position:relative;width:100%;height:480px}
.host-collage__cell{position:absolute;padding:0;border:none;background:#e9e4dc;border-radius:18px;overflow:hidden;cursor:zoom-in;box-shadow:0 18px 45px rgba(11,61,76,.18);transition:transform .45s cubic-bezier(.2,.7,.2,1),box-shadow .45s}
.host-collage__cell img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.host-collage__cell:hover{transform:translateY(-5px);box-shadow:0 26px 60px rgba(11,61,76,.28)}
.host-collage__cell:hover img{transform:scale(1.07)}
.host-collage__main{left:0;top:7%;width:63%;height:80%;z-index:2}
.host-collage__sub2{right:0;top:0;width:43%;height:42%;z-index:2;border:5px solid #fff}
.host-collage__sub3{right:3%;bottom:0;width:48%;height:52%;z-index:3;border:5px solid #fff;box-shadow:0 24px 55px rgba(11,61,76,.26)}
.host-collage__accent{position:absolute;right:7%;bottom:9%;width:46%;height:50%;border-radius:18px;background:rgba(11,61,76,.07);z-index:1}
.host-collage__zoom{position:absolute;left:24%;top:40%;z-index:4;width:50px;height:50px;display:flex;align-items:center;justify-content:center;border-radius:999px;background:rgba(255,255,255,.92);color:var(--color-primary);opacity:0;transform:scale(.8);transition:opacity .3s,transform .3s;pointer-events:none;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.host-collage:hover .host-collage__zoom{opacity:1;transform:scale(1)}
.host-collage__zoom svg{width:22px;height:22px}
@media (max-width:1023px){.host-collage{height:420px}}
@media (max-width:520px){.host-collage{height:330px}.host-collage__main{width:66%;height:78%}.host-collage__sub2{width:47%}.host-collage__sub3{width:52%}}

/* =============================================================
   Tăng tương phản cho header trắng khi trong suốt (hero sáng màu)
   -> logo + hamburger + nav-link luôn nhìn rõ trên mọi nền
   ============================================================= */
.site-header:not(.scrolled) .header-logo { filter: brightness(0) invert() drop-shadow(0 2px 6px rgba(0, 0, 0, 0.5)); }
.site-header:not(.scrolled) .hamburger span { box-shadow: 0 0 4px rgba(0, 0, 0, 0.55); }
.site-header:not(.scrolled) .nav-link { text-shadow: 0 1px 8px rgba(0, 0, 0, 0.35); }
.site-header:not(.scrolled) .lang-trigger { box-shadow: 0 2px 10px rgba(0, 0, 0, 0.18); }

/* Lớp gradient tối nhẹ cho header khi trong suốt -> đảm bảo logo/nav/hamburger luôn rõ trên hero sáng */
.site-header:not(.scrolled) { background: linear-gradient(to bottom, rgba(7, 42, 53, 0.62), rgba(7, 42, 53, 0.34)); }