/* Queeny base: tokens, reset, type, buttons, nav, environment, reveal, dialog, footer.
   Every section file builds on these. Animate only transform and opacity. */

:root{
  --canvas:#0A1030;
  --panel:#111A45;
  --panel-raised:#18235C;
  --accent:#E8C66A;
  --accent-hover:#F4D98B;
  --accent-muted:rgba(232,198,106,.30);
  --brand-blue:#0034C8;
  --text-primary:#F5EFE0;
  --text-secondary:#B7BED8;
  --line:rgba(245,239,224,.16);
  --line-strong:rgba(245,239,224,.46);

  --ease-out:cubic-bezier(.22,.8,.24,1);
  --ease-soft:cubic-bezier(.4,.1,.2,1);

  --font-display:'Prata',Georgia,'Times New Roman',serif;
  --font-body:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-mono:'IBM Plex Mono',ui-monospace,Menlo,Consolas,monospace;

  --gutter:clamp(20px,5vw,56px);
  --maxw:1200px;
  --nav-h:68px;
  --radius:18px;
}

*,*::before,*::after{box-sizing:border-box}
html{overflow-x:hidden;overflow-x:clip;scroll-padding-top:calc(var(--nav-h) + 12px);-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;overflow-x:hidden;overflow-x:clip;background:var(--canvas);color:var(--text-primary);font:400 1.0625rem/1.65 var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;min-height:100vh}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:var(--accent);color:#0A1030}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
main:focus{outline:none}

.skip{position:fixed;left:16px;top:-80px;z-index:200;padding:12px 18px;border-radius:10px;background:var(--accent);color:#0A1030;font-weight:500;text-decoration:none;transition:transform .3s var(--ease-out)}
.skip:focus{transform:translateY(92px)}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}

/* ---------- type primitives ---------- */
.wrap{width:min(100% - 2*var(--gutter),var(--maxw));margin-inline:auto}
.section{position:relative;padding-block:clamp(88px,12vw,168px)}
.kicker{font:500 .75rem/1.2 var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}
.h2{font:400 clamp(2rem,4.8vw,3.9rem)/1.1 var(--font-display);letter-spacing:-.005em;text-wrap:balance;margin-top:.5em}
.h3{font:400 clamp(1.35rem,2.2vw,1.75rem)/1.2 var(--font-display);text-wrap:balance}
.lede{font-size:clamp(1.0625rem,1.6vw,1.25rem);line-height:1.65;color:var(--text-secondary);max-width:58ch;text-wrap:pretty;margin-top:1.1em}
.mono{font-family:var(--font-mono)}
.muted{color:var(--text-secondary)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.65em;min-height:52px;padding:0 1.65em;border-radius:999px;border:1px solid transparent;font:500 1rem/1 var(--font-body);letter-spacing:.01em;text-decoration:none;cursor:pointer;position:relative;isolation:isolate;transition:transform .35s var(--ease-out),background-color .3s var(--ease-soft),color .3s,border-color .3s}
.btn .ico{width:1.25em;height:1.25em;flex:none}
.btn-gold{background:var(--accent);color:#0A1030}
.btn-gold::before{content:"";position:absolute;inset:0;border-radius:inherit;z-index:-1;box-shadow:0 14px 44px rgba(232,198,106,.38);opacity:0;transition:opacity .4s var(--ease-soft)}
.btn-gold:hover{background:var(--accent-hover);transform:translateY(-1px)}
.btn-gold:hover::before{opacity:1}
.btn-gold:active{transform:translateY(0)}
.btn-ghost{border-color:var(--line-strong);color:var(--text-primary);background:transparent}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{min-height:42px;padding:0 1.15em;font-size:.9375rem}
.link-u{display:inline-block;text-decoration:none;color:var(--text-primary);background:linear-gradient(var(--accent),var(--accent)) 0 100%/100% 1px no-repeat;padding-bottom:3px;transition:color .3s,background-size .4s var(--ease-out)}
.link-u:hover{color:var(--accent-hover)}
@media (pointer:coarse){
  .btn{min-height:48px}
  .btn-sm{min-height:44px}
  .link-u{display:inline-flex;align-items:center;min-height:44px}
}

/* ---------- environment: one fixed layer behind everything (the sunbeam) ---------- */
.env{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;--p:0}
.env>*{position:absolute;pointer-events:none}
.env-cool{inset:0;background:radial-gradient(ellipse 90% 55% at 18% 0%,rgba(120,160,255,.15),transparent 70%);opacity:calc(1 - var(--p)*1.3)}
.env-warm{inset:0;background:radial-gradient(ellipse 85% 60% at 82% 100%,rgba(236,160,72,.22),transparent 72%);opacity:var(--p)}
.env-beam{inset:-25% -35%;background:linear-gradient(100deg,transparent 36%,rgba(255,214,140,.07) 44%,rgba(255,228,176,.15) 50%,rgba(255,214,140,.07) 56%,transparent 64%);transform:translate3d(calc(var(--p)*30vw - 15vw),0,0) rotate(-7deg);opacity:calc(.95 - var(--p)*.4);will-change:transform}
.env-beam-2{inset:-25% -35%;background:linear-gradient(100deg,transparent 56%,rgba(255,214,140,.05) 60%,rgba(255,228,176,.09) 62%,rgba(255,214,140,.05) 64%,transparent 68%);transform:translate3d(calc(var(--p)*22vw - 8vw),0,0) rotate(-7deg);opacity:calc(.9 - var(--p)*.5)}
.motes{inset:0}
.mote{position:absolute;left:var(--x);top:var(--y);width:var(--s);height:var(--s);border-radius:50%;background:#FFE7B0;opacity:0}
.env.run .mote{animation:mote var(--d) linear var(--dl) infinite}
@keyframes mote{
  0%{transform:translate3d(0,0,0);opacity:0}
  12%{opacity:var(--o)}
  88%{opacity:var(--o)}
  100%{transform:translate3d(var(--dx),var(--dy),0);opacity:0}
}
.grain{inset:0;opacity:.055;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 .9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}
body.paused *,body.paused *::before,body.paused *::after{animation-play-state:paused!important}

main,.footer{position:relative;z-index:1}

/* ---------- nav ---------- */
.nav{position:fixed;inset:0 0 auto 0;z-index:60;height:var(--nav-h);display:flex;align-items:center;transition:background-color .4s var(--ease-soft)}
.nav::before{content:"";position:absolute;inset:0;background:rgba(10,16,48,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);opacity:0;transition:opacity .4s var(--ease-soft);z-index:-1}
.nav.solid::before{opacity:1}
.nav-inner{display:flex;align-items:center;gap:clamp(16px,3vw,40px);width:min(100% - 2*var(--gutter),var(--maxw));margin-inline:auto}
.brand{display:block;flex:none;line-height:0;border-radius:9px;overflow:hidden;box-shadow:0 0 0 1px rgba(232,198,106,.38)}
.brand img{height:44px;width:auto}
.nav-links{display:flex;gap:clamp(18px,2.6vw,36px);margin-left:auto}
.nav-links a{position:relative;display:inline-block;padding:10px 2px;text-decoration:none;font-size:.9375rem;font-weight:500;color:var(--text-secondary);transition:color .3s}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease-out)}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--text-primary)}
.nav-links a:hover::after,.nav-links a:focus-visible::after{transform:scaleX(1)}
.nav .btn{flex:none}
.nav-rail{position:absolute;left:0;right:0;bottom:0;height:8px;transform:translateY(50%);opacity:0;transition:opacity .5s var(--ease-soft);background:radial-gradient(circle,transparent 2.1px,var(--accent) 2.5px,var(--accent) 3.3px,transparent 3.7px) 0 50%/132px 8px repeat-x;-webkit-mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent);mask-image:linear-gradient(90deg,transparent,#000 14%,#000 86%,transparent)}
.nav-rail::before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:var(--accent-muted)}
.nav.solid .nav-rail{opacity:.7}
.menu-btn{display:none;flex:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);background:transparent;cursor:pointer;position:relative}
.menu-btn span{position:absolute;left:12px;right:12px;height:1.5px;background:var(--text-primary);transition:transform .35s var(--ease-out),opacity .25s}
.menu-btn span:nth-child(1){top:16px}.menu-btn span:nth-child(2){top:21px}.menu-btn span:nth-child(3){top:26px}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.menu{display:none}
@media (max-width:860px){
  .nav-links{display:none}
  .nav .btn{margin-left:auto}
  .menu-btn{display:block}
  .menu{display:block;position:fixed;inset:var(--nav-h) 0 auto 0;z-index:59;background:rgba(10,16,48,.96);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding:8px var(--gutter) 22px;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .35s var(--ease-soft),transform .35s var(--ease-out),visibility 0s .35s}
  .menu.open{opacity:1;visibility:visible;transform:none;transition-delay:0s}
  .menu a{display:flex;align-items:center;min-height:52px;text-decoration:none;font:400 1.35rem/1 var(--font-display);border-bottom:1px solid var(--line)}
  .menu a:last-child{border-bottom:0}
}
@media (max-width:420px){
  .nav .btn{padding:0 1em;font-size:.875rem}
  .brand img{height:40px}
}

/* ---------- reveal choreography (container .reveal, children .rv) ---------- */
.js .reveal .rv{opacity:0;transform:translate3d(0,22px,0);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out);transition-delay:calc(var(--i,0)*90ms)}
.js .reveal.in .rv{opacity:1;transform:none}
.js .reveal.in.done .rv{transition-delay:0s}
.js .reveal .rv-fade{opacity:0;transition:opacity 1.2s var(--ease-soft);transition-delay:calc(var(--i,0)*90ms)}
.js .reveal.in .rv-fade{opacity:1}

/* ---------- self-drawing gold lines (JS sets --k from 0 to 1) ---------- */
.draw{fill:none;stroke:var(--accent);stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1;stroke-dashoffset:calc(1 - var(--k,0))}
.divider{display:block;width:min(100% - 2*var(--gutter),var(--maxw));margin-inline:auto;height:28px;opacity:.75}
.divider path{vector-effect:non-scaling-stroke}

/* ---------- contact dialog (desktop Zalo panel) ---------- */
.contact-dialog{border:0;padding:0;background:transparent;color:var(--text-primary);width:min(94vw,740px);max-width:none;margin:auto;overflow:visible}
.contact-dialog::backdrop{background:rgba(5,8,28,.74);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.contact-card{position:relative;display:grid;grid-template-columns:auto 1fr;gap:clamp(22px,4vw,44px);align-items:center;padding:clamp(26px,4vw,44px);background:var(--panel);border:1px solid var(--line-strong);border-radius:26px;box-shadow:0 40px 120px rgba(0,0,0,.5)}
.contact-card .qr{width:min(220px,50vw);aspect-ratio:1;border-radius:16px;background:#F5EFE0;padding:8px}
.contact-card .qr img{width:100%;height:100%}
.contact-card h2{font:400 clamp(1.5rem,3vw,2.1rem)/1.15 var(--font-display);text-wrap:balance}
.contact-card p{color:var(--text-secondary);margin-top:.7em}
.contact-list{margin-top:1.2em;display:grid;gap:.4em}
.contact-list a{color:var(--text-primary);font-weight:500;text-decoration:none}
.contact-list a:hover{color:var(--accent-hover)}
.contact-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:1.4em}
.dialog-close{position:absolute;top:12px;right:12px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:transparent;cursor:pointer;display:grid;place-items:center;transition:border-color .3s,color .3s}
.dialog-close:hover{border-color:var(--accent);color:var(--accent)}
.dialog-close svg{width:16px;height:16px}
@media (max-width:640px){.contact-card{grid-template-columns:1fr;justify-items:start}.contact-card .qr{width:min(200px,56vw)}}
.contact-dialog[open]{animation:dlg .45s var(--ease-out)}
@keyframes dlg{from{opacity:0;transform:translate3d(0,14px,0)}to{opacity:1;transform:none}}

/* ---------- footer ---------- */
.footer{padding:clamp(56px,8vw,96px) 0 40px;background:linear-gradient(180deg,transparent,rgba(5,8,28,.55) 40%);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:clamp(28px,5vw,64px)}
.footer .brand{display:inline-block;width:132px;border-radius:12px}
.footer .brand img{height:auto;width:100%}
.footer-tag{font:400 1.5rem/1.2 var(--font-display);margin-top:20px;max-width:16ch}
.footer h2{font:500 .75rem/1.2 var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:14px}
.footer li,.footer address{font-style:normal;color:var(--text-secondary);line-height:1.7}
.footer a{color:var(--text-primary);text-decoration:none}
.footer a:hover{color:var(--accent-hover)}
.footer ul{display:grid;gap:0}
.footer li a,.footer address a{display:inline-block;padding:9px 0}   /* 44px tall tap targets for thumbs */
.footer-note{margin-top:clamp(36px,6vw,64px);padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between;font-size:.875rem;color:var(--text-secondary)}
.footer-note p{max-width:62ch}
@media (max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>:first-child{grid-column:1/-1}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr}}

/* ---------- reduced motion: final states, nothing moving ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js .reveal .rv,.js .reveal .rv-fade{opacity:1!important;transform:none!important}
  .draw{stroke-dashoffset:0!important}
  .env-beam,.env-beam-2{transform:rotate(-7deg) translate3d(0,0,0)!important}
  .motes{display:none}
}