/* ==========================================================================
   Shared site chrome (header / mobile-nav / footer / float actions / chat
   widget / liquid-glass scene) — extracted from index.html so bai-viet.aspx
   and tin-tuc.aspx can render byte-identical header/footer/chat without
   duplicating the whole block inside a C# string. If the homepage's chrome
   ever changes, mirror the change here too (and vice versa) — there is no
   build step tying the two together.
   ========================================================================== */
:root{
  /* Base page background — mirrors index.html. Still used directly by header/.mobile-nav
     (kept as flat opaque chrome, no blur, per an earlier explicit ask). */
  --bg-main:#08121C;
  --text-main:#ffffff;
  --green-700:#0e6b34;
  --green-600:#159649;
  --green-500:#1fb35a;
  --green-100:#e4f7ec;
  --red-600:#e2241a;
  --navy-900:#0a1f36;
  --gray-400:#8fa0b0;
  --gray-600:#4a5c6e;
  --gray-800:#233242;
  /* Liquid glass — mirrors index.html. .glass/.glass-dark are translucent + blurred, so
     .scene's fixed photo (tin-tuc.aspx's news-hero, index.html's hero-grid) reads softly
     through every card. */
  --glass-bg:rgba(255,255,255,.12);
  --glass-bg-strong:rgba(255,255,255,.95);
  --glass-border:rgba(255,255,255,.28);
  --glass-shadow:0 8px 26px rgba(0,0,0,.28);
  --glass-heading:#ffffff;
  --glass-body:rgba(255,255,255,.85);
  --glass-text-shadow:0 1px 3px rgba(0,0,0,.45),0 4px 16px rgba(0,0,0,.3);
  --glass-dark-bg:rgba(6,16,28,.55);
  --glass-dark-border:rgba(255,255,255,.16);
  --glass-dark-shadow:0 8px 26px rgba(0,0,0,.32);
  --blur:22px;
  --radius:20px;
  --radius-sm:14px;
  --container:1180px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:auto}
body{
  font-family:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  color:var(--text-main);
  background:var(--bg-main);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.wrap{max-width:var(--container);margin:0 auto;padding:0 24px}
.hidden-sprite{position:absolute;width:0;height:0;overflow:hidden}

/* ---------- Fixed background scene — tin-tuc.aspx's .news-hero only; every other section
   (news-body, footer) paints its own opaque background over this. ---------- */
.scene{
  position:fixed;inset:0;z-index:-1;overflow:hidden;
  background:
    linear-gradient(180deg,rgba(4,10,17,.35),rgba(4,10,17,.7)),
    url('scene-bg.jpg?v=3') 60% 25% / cover no-repeat,
    var(--bg-main);
}
@media (max-width:900px){
  .scene{background-position:68% 22%}
}

/* ---------- Liquid glass utility ---------- */
.glass{
  background:var(--glass-bg);
  -webkit-backdrop-filter:blur(var(--blur)) saturate(180%);
  backdrop-filter:blur(var(--blur)) saturate(180%);
  border:1px solid var(--glass-border);
  box-shadow:var(--glass-shadow);
}

/* ---------- Utility ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--green-500);
}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 26px;border-radius:100px;
  font-weight:700;font-size:15px;letter-spacing:.01em;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--green-600);color:#fff;box-shadow:0 10px 24px rgba(21,150,73,.32)}
.btn-primary:hover{background:var(--green-700);transform:translateY(-2px);box-shadow:0 14px 28px rgba(21,150,73,.4)}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.is-visible{opacity:1;transform:translateY(0)}

/* ---------- Header ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:200;padding:18px 20px 0;
}
header::before{
  content:'';position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(180deg,rgba(3,9,16,.6) 0%,rgba(3,9,16,.4) 60%,rgba(3,9,16,.12) 100%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  backdrop-filter:blur(16px) saturate(160%);
}
.header-inner{
  max-width:var(--container);margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:10px 6px;
}
.logo{display:flex;align-items:center;gap:10px}
.logo img{display:block;height:42px;width:auto}
.logo .brandname{
  display:none;font-weight:800;letter-spacing:-.005em;
  font-size:17px;line-height:1.2;color:#fff;white-space:nowrap;
}
@media (min-width:1150px){.logo .brandname{display:block}}

nav.main-nav{display:flex;align-items:center;gap:4px}
nav.main-nav a{
  font-size:14px;font-weight:700;color:#fff;white-space:nowrap;
  padding:8px 15px;border-radius:100px;border:1px solid transparent;
  text-shadow:0 1px 3px rgba(0,0,0,.5),0 2px 12px rgba(0,0,0,.35);
  transition:background .2s,color .2s,border-color .2s;
}
nav.main-nav a:hover{color:var(--green-500)}
nav.main-nav a.active{
  background:rgba(31,179,90,.22);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  backdrop-filter:blur(18px) saturate(160%);
  border-color:rgba(31,179,90,.45);
  color:var(--green-500);
  text-shadow:none;
  box-shadow:0 4px 18px rgba(0,0,0,.25), inset 0 1px 0 rgba(255,255,255,.14);
}

.header-right{display:flex;align-items:center;gap:16px}
.hamburger{display:none;width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);align-items:center;justify-content:center;color:#fff}
.hamburger svg{width:20px;height:20px}

.lang-switch{position:relative}
.lang-btn{
  display:flex;align-items:center;gap:6px;
  padding:8px 13px;border-radius:100px;
  font-size:13px;font-weight:700;color:#fff;white-space:nowrap;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.26);
  transition:background .2s ease;
}
.lang-btn:hover{background:rgba(255,255,255,.24)}
.lang-btn svg{width:16px;height:16px;flex-shrink:0}
.lang-btn .chev{width:11px;height:11px;transition:transform .2s ease}
.lang-switch.open .lang-btn .chev{transform:rotate(180deg)}
.lang-menu{
  position:absolute;top:calc(100% + 10px);right:0;min-width:168px;z-index:10;
  background:rgba(8,20,34,.97);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:6px;
  box-shadow:0 16px 40px rgba(0,0,0,.4);
  opacity:0;pointer-events:none;transform:translateY(-6px);
  transition:opacity .18s ease,transform .18s ease;
}
.lang-switch.open .lang-menu{opacity:1;pointer-events:auto;transform:translateY(0)}
.lang-opt{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;text-align:left;padding:10px 12px;border-radius:9px;font-size:14px;font-weight:600;color:#e8eef4;transition:background .15s ease,color .15s ease}
.lang-opt:hover{background:rgba(255,255,255,.08)}
.lang-opt.active{color:var(--green-500)}
.lang-opt .chk{width:14px;height:14px;opacity:0}
.lang-opt.active .chk{opacity:1}
@media (max-width:1140px){.lang-switch{display:none}}

.mobile-lang-row{display:flex;gap:8px;margin-top:22px}
.mobile-lang-row .lang-opt-m{
  flex:1;padding:11px 6px;border-radius:12px;text-align:center;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);
  color:#fff;font-weight:700;font-size:13.5px;transition:background .2s,border-color .2s,color .2s;
}
.mobile-lang-row .lang-opt-m.active{background:rgba(31,179,90,.22);border-color:rgba(31,179,90,.45);color:var(--green-500)}

.mobile-nav{
  position:fixed;inset:0;z-index:300;
  background:var(--bg-main);
  display:flex;flex-direction:column;padding:24px;
  transform:translateX(100%);transition:transform .35s cubic-bezier(.2,.8,.2,1);
}
.mobile-nav.open{transform:translateX(0)}
.mobile-nav .top{display:flex;justify-content:space-between;align-items:center;margin-bottom:40px}
.mobile-nav .logo img{height:34px;width:auto}
.mobile-nav a{display:block;font-size:22px;font-weight:700;color:#fff;padding:16px 18px;border-bottom:1px solid rgba(255,255,255,.12);border-radius:12px;transition:background .2s,color .2s}
.mobile-nav a.active{background:rgba(31,179,90,.16);color:var(--green-500)}
.mobile-nav .close-btn{width:40px;height:40px;border-radius:10px;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;color:#fff}
.mobile-nav .close-btn svg{width:20px;height:20px}

/* ---------- Footer ---------- */
footer{position:relative}
.footer-inner{position:relative;overflow:hidden;padding:40px 0 0}
/* The actual footer content — same liquid-glass treatment as every other card, floating
   directly on the fixed .scene photo (mirrors index.html). */
.footer-glass-card{
  position:relative;z-index:2;
  background:rgba(6,16,28,.55);
  -webkit-backdrop-filter:blur(22px) saturate(160%);
  backdrop-filter:blur(22px) saturate(160%);
  border:1px solid rgba(255,255,255,.16);
  border-top-left-radius:32px;border-top-right-radius:32px;
  box-shadow:0 -12px 40px rgba(0,0,0,.18);
  padding:52px 46px 32px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.14)}
.footer-brand p{font-size:13.5px;margin:16px 0 18px;max-width:300px;line-height:1.7;color:#c3d2e0}
.footer-brand .slogan{color:var(--green-500);font-weight:700;font-size:13.3px;letter-spacing:.03em}
footer h6{color:#fff;font-size:14px;font-weight:800;margin-bottom:16px;letter-spacing:.02em}
footer ul{display:flex;flex-direction:column;gap:11px}
footer ul a{font-size:13.5px;color:#a9bccc;transition:color .2s}
footer ul a:hover{color:var(--green-500)}
.footer-addr{font-size:13.5px;color:var(--green-500);font-weight:700}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-top:20px;font-size:12.5px;color:#7288a0}

/* ---------- Floating buttons ---------- */
.float-actions{position:fixed;right:22px;bottom:22px;z-index:150;display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.fab{
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  box-shadow:0 12px 28px rgba(10,20,35,.25);transition:transform .2s;color:#fff;
}
.fab:hover{transform:scale(1.08)}
.fab svg{width:24px;height:24px}
.fab.call{background:var(--green-600)}
.fab.top{color:var(--glass-heading);text-shadow:var(--glass-text-shadow);opacity:0;pointer-events:none;transition:opacity .25s,transform .2s}
.fab.top.show{opacity:1;pointer-events:auto}
.fab.chat{background:linear-gradient(135deg,var(--green-600),var(--green-700))}
.fab.chat .dot{position:absolute;top:2px;right:2px;width:12px;height:12px;border-radius:50%;background:var(--red-600);border:2px solid var(--navy-900)}

/* ---------- Chat widget ---------- */
.chat-widget{
  position:fixed;right:22px;bottom:88px;z-index:151;
  width:346px;max-width:calc(100vw - 32px);max-height:min(560px,calc(100vh - 130px));
  border-radius:20px;overflow:hidden;display:flex;flex-direction:column;
  background:rgba(12,26,42,.98);
  -webkit-backdrop-filter:blur(24px) saturate(160%);backdrop-filter:blur(24px) saturate(160%);
  border:1px solid rgba(255,255,255,.14);box-shadow:0 24px 60px rgba(0,0,0,.45);
  opacity:0;transform:translateY(16px) scale(.97);pointer-events:none;
  transition:opacity .22s ease,transform .22s ease;
}
.chat-widget.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}
.chat-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:16px 18px;border-bottom:1px solid rgba(255,255,255,.1);flex-shrink:0}
.chat-head-info{display:flex;align-items:center;gap:12px;min-width:0}
.chat-avatar{width:38px;height:38px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,var(--green-600),var(--green-700));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:13px}
.chat-head-info h4{font-size:14.5px;font-weight:800;color:#fff;margin-bottom:2px}
.chat-head-info span{font-size:12px;color:#8fd7ab;display:flex;align-items:center;gap:5px}
.chat-head-info span::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--green-500)}
.chat-close{width:30px;height:30px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:#c3d2e0;background:rgba(255,255,255,.08);transition:background .2s}
.chat-close:hover{background:rgba(255,255,255,.16)}
.chat-close svg{width:16px;height:16px}
.chat-body{flex:1;overflow-y:auto;padding:16px 16px 4px;display:flex;flex-direction:column;gap:10px}
.chat-msg{max-width:88%;padding:10px 13px;border-radius:14px;font-size:13.5px;line-height:1.55}
.chat-msg.bot{align-self:flex-start;background:rgba(255,255,255,.08);color:#e8eef4;border-bottom-left-radius:4px}
.chat-msg.user{align-self:flex-end;background:var(--green-600);color:#fff;border-bottom-right-radius:4px}
.chat-options{display:flex;flex-direction:column;gap:8px;align-self:stretch;margin-top:2px}
.chat-opt-btn{
  text-align:left;padding:11px 14px;border-radius:12px;font-size:13.5px;font-weight:600;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);color:#e8eef4;
  transition:background .18s ease,border-color .18s ease;
}
.chat-opt-btn:hover{background:rgba(31,179,90,.18);border-color:rgba(31,179,90,.4)}
.chat-other-row{
  display:flex;align-items:center;gap:8px;
  padding:9px 9px 9px 14px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  transition:border-color .18s ease;
}
.chat-other-row:focus-within{border-color:rgba(31,179,90,.4)}
.chat-other-row input{
  flex:1;min-width:0;border:none;background:transparent;color:#fff;
  font-family:inherit;font-size:13.5px;padding:5px 0;
}
.chat-other-row input::placeholder{color:#7f93a5}
.chat-other-row input:focus{outline:none}
.chat-other-row button{
  width:30px;height:30px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--green-600);color:#fff;transition:background .2s ease;
}
.chat-other-row button:hover{background:var(--green-700)}
.chat-other-row button svg{width:14px;height:14px}
.chat-form{display:flex;flex-direction:column;gap:9px;margin-top:2px}
.chat-form input{
  border:1.5px solid rgba(255,255,255,.16);border-radius:10px;padding:10px 12px;
  font-family:inherit;font-size:13.5px;color:#fff;background:rgba(255,255,255,.06);
}
.chat-form input::placeholder{color:#7f93a5}
.chat-form input:focus{outline:none;border-color:var(--green-500)}
.chat-form button{margin-top:2px}
.chat-foot{padding:12px 16px 16px;flex-shrink:0}
.chat-restart{width:100%;text-align:center;padding:9px;font-size:12.5px;font-weight:700;color:#8fa4b8;border-radius:10px;transition:color .2s}
.chat-restart:hover{color:var(--green-500)}
@media (max-width:480px){
  .chat-widget{right:16px;bottom:82px;width:calc(100vw - 32px)}
}

/* ---------- Responsive (chrome-level) ---------- */
@media (max-width:1140px){
  nav.main-nav{display:none}
  .hamburger{display:flex}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-glass-card{padding:32px 24px 22px;border-top-left-radius:22px;border-top-right-radius:22px}
}