/* ═══════════════════════════════════════════════════
   MERUVA · DESIGN SYSTEM · SHARED CSS
   ═══════════════════════════════════════════════════ */

:root {
  --black:       #0A0A0A;
  --black-2:     #111111;
  --black-3:     #1a1a1a;
  --gold:        #D4A437;
  --gold-light:  #F0C860;
  --gold-dark:   #A07820;
  --gold-glow:   rgba(212,164,55,0.12);
  --gold-glow2:  rgba(212,164,55,0.25);
  --cream:       #F5F0E6;
  --blue:        #3B7BC4;
  --blue-light:  #5EA0E8;
  --silver:      #C0C0C8;
  --silver-soft: #888890;
  --ink:         #1A1A1A;
  --line:        rgba(212,164,55,0.18);
  --line-soft:   rgba(192,192,200,0.10);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--black);
  color:var(--cream);
  font-family:'Inter',sans-serif;
  font-weight:400;
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

/* ─── CURSOR ─────────────────────────────── */
#cursor{
  position:fixed;width:10px;height:10px;
  border-radius:50%;background:var(--gold);
  pointer-events:none;z-index:99999;
  transform:translate(-50%,-50%);
  transition:width .3s,height .3s,opacity .3s;
  mix-blend-mode:difference;
}
#cursor-ring{
  position:fixed;width:36px;height:36px;
  border-radius:50%;border:1px solid rgba(212,164,55,0.5);
  pointer-events:none;z-index:99998;
  transform:translate(-50%,-50%);
  transition:transform .12s ease,width .3s,height .3s,border-color .3s;
}
@media(pointer:fine){
  /* Ẩn toàn bộ cursor native — custom gold dot thay thế */
  html, body, * {
    cursor: none !important;
  }

  /* Custom dot lớn hơn khi hover vào vùng tương tác */
  body:has(a:hover) #cursor,
  body:has(button:hover) #cursor,
  body:has(select:hover) #cursor,
  body:has(label:hover) #cursor,
  body:has([role="button"]:hover) #cursor { width:18px; height:18px; }

  body:has(a:hover) #cursor-ring,
  body:has(button:hover) #cursor-ring,
  body:has(select:hover) #cursor-ring,
  body:has(label:hover) #cursor-ring,
  body:has([role="button"]:hover) #cursor-ring { width:52px; height:52px; border-color:var(--gold); }
}
@media(pointer:coarse){
  #cursor,#cursor-ring{display:none}
}

/* ─── PAGE LOADER ─────────────────────────── */
#page-loader{
  position:fixed;inset:0;z-index:9999;
  background:var(--black);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2.5rem;
  transition:opacity .7s ease,visibility .7s ease;
}
#page-loader.out{opacity:0;visibility:hidden;pointer-events:none}
.pl-logo-wrap{
  display:flex;flex-direction:column;align-items:center;gap:1.4rem;
  opacity:0;animation:plIn .9s .1s cubic-bezier(.22,1,.36,1) forwards;
}
@keyframes plIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.pl-wm{
  font-family:'Cormorant Garamond',serif;font-weight:700;
  font-size:2.2rem;letter-spacing:.55em;padding-right:.55em;
  background:linear-gradient(90deg,#b0b0bc 0%,#e8e8f0 35%,#ffffff 50%,#e0c060 75%,#c09020 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.pl-tag{
  font-family:'Cormorant Garamond',serif;font-style:italic;
  font-size:.9rem;color:rgba(212,164,55,.6);letter-spacing:.18em;
}
.pl-sweep{
  width:200px;height:1px;background:rgba(255,255,255,.06);position:relative;overflow:hidden;
}
.pl-sweep::after{
  content:"";position:absolute;left:-100%;top:0;width:100%;height:100%;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
  animation:sweep 1.6s ease-in-out infinite;
}
@keyframes sweep{0%{left:-100%}100%{left:100%}}

/* ─── SUBPAGE TRANSITION LOADER ──────────── */
#sub-loader{
  position:fixed;inset:0;z-index:8888;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:2rem;opacity:0;visibility:hidden;
  transition:opacity .3s,visibility .3s;
}
#sub-loader.in{opacity:1;visibility:visible}
#sub-loader .sl-bg{position:absolute;inset:0;background:var(--black)}
#sub-loader .sl-radial{
  position:absolute;inset:0;opacity:0;
  transition:opacity .4s;
}
#sub-loader.in .sl-radial{opacity:1}
#sub-loader .sl-body{
  position:relative;z-index:1;
  display:flex;flex-direction:column;align-items:center;gap:1.6rem;text-align:center;
}
#sub-loader .sl-icon{
  width:72px;height:72px;
  opacity:0;transform:translateY(16px) scale(.9);
  transition:opacity .5s .15s,transform .5s .15s cubic-bezier(.22,1,.36,1);
}
#sub-loader.in .sl-icon{opacity:1;transform:translateY(0) scale(1)}
#sub-loader .sl-name{
  font-family:'Cormorant Garamond',serif;font-weight:600;
  font-size:2rem;letter-spacing:.2em;
  opacity:0;transform:translateY(10px);
  transition:opacity .5s .25s,transform .5s .25s cubic-bezier(.22,1,.36,1);
}
#sub-loader.in .sl-name{opacity:1;transform:translateY(0)}
#sub-loader .sl-sub{
  font-size:.68rem;letter-spacing:.35em;text-transform:uppercase;
  color:rgba(192,192,200,.55);
  opacity:0;transform:translateY(8px);
  transition:opacity .4s .35s,transform .4s .35s;
}
#sub-loader.in .sl-sub{opacity:1;transform:translateY(0)}
#sub-loader .sl-bar{
  width:140px;height:1px;background:rgba(255,255,255,.06);
  position:relative;overflow:hidden;
}
#sub-loader .sl-bar::after{
  content:"";position:absolute;left:-100%;top:0;width:100%;height:100%;
  background:currentColor;
  transition:none;
}
#sub-loader.loading .sl-bar::after{
  animation:barFill 1.1s .45s ease forwards;
}
@keyframes barFill{from{left:-100%}to{left:0%}}

/* ─── NAV ─────────────────────────────────── */
nav{
  position:fixed;top:0;left:0;right:0;z-index:500;
  padding:1.5rem 3rem;
  display:flex;justify-content:space-between;align-items:center;
  background:rgba(10,10,10,.7);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid transparent;
  transition:all .4s ease;
}
nav.scrolled{border-bottom-color:var(--line);padding:1rem 3rem}
.logo-wrap{display:flex;align-items:center;gap:.8rem;text-decoration:none}
.logo-mark{width:44px;height:44px;flex-shrink:0;object-fit:contain}
.logo-text{
  font-family:'Cormorant Garamond',serif;font-weight:700;
  font-size:1.25rem;letter-spacing:.35em;
  background:linear-gradient(90deg,#c8c8d4,#ffffff 40%,#d4a437);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.nav-links{display:flex;gap:2.5rem;list-style:none}
.nav-links a{
  color:var(--silver);text-decoration:none;
  font-size:.7rem;letter-spacing:.28em;text-transform:uppercase;font-weight:500;
  position:relative;transition:color .3s;
}
.nav-links a:hover{color:var(--gold)}
.nav-links a::after{
  content:"";position:absolute;bottom:-6px;left:0;
  width:0;height:1px;background:var(--gold);transition:width .4s ease;
}
.nav-links a:hover::after{width:100%}
.nav-cta{
  padding:.6rem 1.4rem;
  border:1px solid var(--gold);color:var(--gold)!important;
  font-size:.65rem!important;letter-spacing:.25em!important;
  transition:all .3s!important;
  white-space:nowrap;
}
.nav-cta:hover{background:var(--gold);color:var(--black)!important}
.nav-cta::after{display:none!important}

/* ─── SECTIONS BASE ────────────────────────── */
section{padding:8rem 3rem 6rem;position:relative;z-index:1}
.container{max-width:1400px;margin:0 auto;width:100%}
.section-label{
  font-size:.65rem;letter-spacing:.45em;text-transform:uppercase;
  color:var(--gold);font-weight:500;
  display:flex;align-items:center;gap:.8rem;margin-bottom:1.2rem;
}
.section-label::before{content:"▲";font-size:.55rem}
.section-title{
  font-family:'Cormorant Garamond',serif;font-weight:300;
  font-size:clamp(2.8rem,5vw,5rem);
  line-height:1;letter-spacing:-.01em;color:var(--cream);
  margin-bottom:1.5rem;
}
.section-title em{font-style:italic;font-weight:500;color:var(--gold)}

.reveal{
  opacity:0;transform:translateY(36px);
  transition:opacity 1.1s cubic-bezier(.22,1,.36,1),transform 1.1s cubic-bezier(.22,1,.36,1);
}
.reveal.in{opacity:1;transform:translateY(0)}
.reveal-scale{
  opacity:0;transform:scale(.96);
  transition:opacity 1s cubic-bezier(.22,1,.36,1),transform 1s cubic-bezier(.22,1,.36,1);
}
.reveal-scale.in{opacity:1;transform:scale(1)}

/* ─── BUTTONS ─────────────────────────────── */
.btn-gold{
  display:inline-flex;align-items:center;gap:.8rem;
  padding:1.1rem 2.4rem;background:var(--gold);
  color:var(--black);text-decoration:none;
  font-size:.7rem;letter-spacing:.25em;text-transform:uppercase;font-weight:700;
  transition:all .4s;border:1px solid var(--gold);clip-path:polygon(0 0,calc(100% - 12px) 0,100% 100%,0 100%);
}
.btn-gold:hover{background:transparent;color:var(--gold);transform:translateX(4px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:.6rem;
  font-size:.7rem;letter-spacing:.25em;text-transform:uppercase;
  color:var(--silver);text-decoration:none;font-weight:500;
  transition:color .3s;
}
.btn-ghost:hover{color:var(--cream)}
.btn-ghost .arr{transition:transform .3s}
.btn-ghost:hover .arr{transform:translateX(4px)}

/* ─── FOOTER ────────────────────────────── */
footer{
  padding:4rem 3rem 3rem;
  border-top:1px solid var(--line);
  display:grid;grid-template-columns:1fr 1fr 1fr;
  gap:3rem;align-items:center;
}
.footer-logo{display:flex;flex-direction:column;gap:1rem}
.footer-tagline{
  font-family:'Cormorant Garamond',serif;font-style:italic;
  font-size:.95rem;color:rgba(212,164,55,.7);
}
.footer-links{
  display:flex;gap:2rem;list-style:none;justify-content:center;flex-wrap:wrap;
}
.footer-links a{
  font-size:.65rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--silver-soft);text-decoration:none;transition:color .3s;
}
.footer-links a:hover{color:var(--gold)}
.footer-copy{
  text-align:right;font-size:.65rem;letter-spacing:.15em;
  color:rgba(192,192,200,.35);
}

/* ─── LANGUAGE SWITCHER ──────────────────── */
.nav-right{display:flex;align-items:center;gap:1rem}
.lang-switcher{
  display:flex;align-items:center;
  border:1px solid var(--line-soft);overflow:hidden;flex-shrink:0;
}
.lang-btn{
  font-size:.55rem;letter-spacing:.15em;font-weight:700;
  text-transform:uppercase;color:var(--silver-soft);
  text-decoration:none;padding:.42rem .7rem;
  transition:all .3s;line-height:1;display:block;
  border:none;background:transparent;cursor:pointer;font-family:'Inter',sans-serif;
}
.lang-btn:hover,.lang-btn.lang-active{color:var(--gold);background:var(--gold-glow)}
.lang-sep{width:1px;height:14px;background:var(--line-soft);display:block;flex-shrink:0;align-self:center}

/* ─── MOBILE NAV BURGER ───────────────────── */
.nav-burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:.3rem}
.nav-burger span{display:block;width:24px;height:1px;background:var(--silver);transition:all .3s}

/* ─── FLOATING BACK BUTTON ──────────────── */
#floating-back{
  display:none;/* shown only on sub-pages */
  position:fixed;left:2.2rem;top:5.5rem;
  z-index:300;
  will-change:transform;
}
#floating-back a{
  display:flex;align-items:center;gap:.55rem;
  color:var(--silver-soft);text-decoration:none;
  font-size:.62rem;letter-spacing:.25em;text-transform:uppercase;font-weight:500;
  padding:.55rem .9rem;
  border:1px solid rgba(192,192,200,.12);
  background:rgba(10,10,10,.72);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:color .3s,border-color .3s,background .3s;
  white-space:nowrap;
}
#floating-back a::before{content:"←";font-size:.8rem;transition:transform .3s}
#floating-back a:hover{color:var(--gold);border-color:var(--gold);background:rgba(10,10,10,.9)}
#floating-back a:hover::before{transform:translateX(-3px)}
.subpage #floating-back{display:block}
@media(max-width:768px){
  /* Hide floating back on mobile — users use native back gesture / footer link */
  .subpage #floating-back{display:none}
}

/* ─── LANG OVERLAY ────────────────────────── */
#lang-overlay{
  position:fixed;inset:0;z-index:9997;
  background:var(--black);
  opacity:0;pointer-events:none;
  transition:opacity .18s ease;
}
#lang-overlay.active{opacity:1;pointer-events:all}

/* ─── FORM SHARED (dùng trên tất cả trang) ──── */
.cf-row{margin-bottom:2rem}
.cf-row label{
  display:block;font-size:.62rem;letter-spacing:.3em;text-transform:uppercase;
  color:var(--silver-soft);margin-bottom:.7rem;
}
.cf-row input,.cf-row textarea{
  width:100%;background:transparent;
  border:none;border-bottom:1px solid var(--line-soft);
  color:var(--cream);font-family:'Inter',sans-serif;font-size:1rem;
  padding:.7rem 0;outline:none;transition:border-color .3s;
}
.cf-row input:focus,.cf-row textarea:focus{border-bottom-color:var(--gold)}
.cf-row textarea{resize:none;min-height:80px}
.cf-row select{
  width:100%;background:var(--black);
  border:none;border-bottom:1px solid var(--line-soft);
  color:var(--silver);font-family:'Inter',sans-serif;font-size:.9rem;
  padding:.8rem 0;outline:none;appearance:none;cursor:pointer;
  transition:border-color .3s;
}
.cf-row select:focus{border-bottom-color:var(--gold)}
.btn-submit{
  display:inline-flex;align-items:center;gap:.8rem;
  padding:1.2rem 2.8rem;background:transparent;
  border:1px solid var(--gold);color:var(--gold);
  font-family:'Inter',sans-serif;font-size:.7rem;
  letter-spacing:.3em;text-transform:uppercase;font-weight:600;
  cursor:pointer;transition:all .4s;
}
.btn-submit:hover{background:var(--gold);color:var(--black)}
.btn-submit:disabled{opacity:.5;cursor:not-allowed}

/* ─── SUBPAGE — ẩn burger (không có nav links) ─ */
.subpage .nav-burger{display:none!important}

/* ─── RESPONSIVE ──────────────────────────── */
@media(max-width:1024px){
  footer{grid-template-columns:1fr;gap:2rem;text-align:center}
  .footer-copy{text-align:center}
  .footer-links{justify-content:center}
  section{padding:4rem 2rem}
}
@media(max-width:768px){
  nav{padding:1.2rem 1.5rem}
  nav.scrolled{padding:.9rem 1.5rem}
  .nav-links{display:none}
  .nav-burger{display:flex}
  .nav-burger span{transition:all .35s cubic-bezier(.22,1,.36,1)}
  .nav-burger.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .nav-burger.is-open span:nth-child(2){opacity:0;transform:scaleX(0)}
  .nav-burger.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .nav-links.nav-open{
    display:flex;flex-direction:column;
    position:fixed;top:0;left:0;right:0;bottom:0;
    background:rgba(10,10,10,.97);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    justify-content:center;align-items:center;gap:3rem;z-index:490;
  }
  .nav-links.nav-open li a{
    font-size:1.4rem!important;letter-spacing:.3em!important;color:var(--cream)!important;
  }
  .nav-links.nav-open li .nav-cta{
    border:1px solid var(--gold)!important;color:var(--gold)!important;
    padding:.8rem 2rem!important;font-size:1rem!important;background:transparent!important;
  }
  section{padding:5rem 1.5rem 4rem}
  footer{padding:3rem 1.5rem 2.5rem;gap:1.6rem}
  .footer-links{gap:1.2rem 1.6rem}
}