/* ===== Karaoke V Party - design tokens (xem SPEC.md mục 4) ===== */
:root{
  --navy-950:#050c1f;--navy-900:#08142f;--navy-800:#0c1d45;--navy-700:#0f2a63;--navy-line:#1b3a7a;
  --gold-300:#efd08a;--gold-500:#d4a84b;--gold-700:#9c7a2c;
  --gold-grad:linear-gradient(135deg,#f3d891 0%,#d4a84b 45%,#9c7a2c 100%);
  --gold-line:rgba(212,168,75,.30);
  --ivory:#f6f0e1;--muted:#a8b3cf;--ok:#2fbf8a;--err:#ff7b80;--zalo:#0068ff;
  --ease:cubic-bezier(.2,.7,.2,1);--r:8px;--hdr:64px;--shadow:0 10px 30px rgba(0,0,0,.35);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;background:var(--navy-900);color:var(--ivory);font:400 16.5px/1.7 "Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;overflow-x:hidden;padding-bottom:env(safe-area-inset-bottom)}
img,video,iframe,svg{max-width:100%}img,video,iframe{display:block}img{height:auto}
h1,h2,h3{font-family:"Playfair Display",Georgia,serif;line-height:1.25;margin:0 0 .5em;font-weight:700;letter-spacing:.02em}
h1{font-size:clamp(34px,6vw,72px);text-transform:uppercase;letter-spacing:.05em}
h2{font-size:clamp(26px,3.6vw,40px);color:var(--gold-500)}
h3{font-size:1.25rem;color:var(--gold-300)}
p{margin:0 0 1em}a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--gold-300);outline-offset:3px;border-radius:4px}
.wrap{width:min(1180px,100% - 40px);margin-inline:auto}
.i{width:1.25em;height:1.25em;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.skip{position:absolute;left:-999px;top:8px;background:var(--gold-500);color:var(--navy-950);padding:8px 14px;border-radius:6px;z-index:200}.skip:focus{left:8px}
.script{font-family:"Dancing Script",cursive;font-weight:500;font-size:clamp(22px,3vw,30px);color:var(--gold-300);display:block;line-height:1.2}

/* ===== Header ===== */
.hdr{position:fixed;inset:0 0 auto 0;z-index:100;transition:background .25s var(--ease),transform .25s var(--ease),box-shadow .25s}
.hdr.solid{background:rgba(8,20,47,.88);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--gold-line)}
.hdr.hide{transform:translateY(-100%)}
.topbar{display:none;font-size:14px;color:var(--muted);border-bottom:1px solid var(--gold-line);max-height:40px;overflow:hidden;transition:max-height .25s}
.topbar .wrap{display:flex;justify-content:space-between;gap:16px;padding-block:7px}
.topbar a:hover{color:var(--gold-300)}.hdr.solid .topbar{max-height:0;border:0}
.hdr-in{display:flex;align-items:center;gap:14px;height:var(--hdr)}
.logo{display:flex;flex-direction:column;line-height:1;margin-right:auto}
.logo b{font:700 26px/1 "Playfair Display",serif;letter-spacing:.08em;color:var(--ivory)}
.logo b i{font-style:normal;background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-size:32px;margin-right:2px}
.logo small{font-size:10.5px;letter-spacing:.32em;color:var(--gold-500);margin-top:4px}
.nav{display:flex;gap:4px}
.nav a{padding:10px 12px;font-size:14px;font-weight:500;letter-spacing:.06em;text-transform:uppercase;border-radius:6px;position:relative}
.nav a::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:1px;background:var(--gold-500);transform:scaleX(0);transition:transform .3s var(--ease)}
.nav a:hover::after,.nav a[aria-current]::after{transform:scaleX(1)}.nav a[aria-current]{color:var(--gold-300)}
.hdr-call{width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--gold-500);border-radius:50%;color:var(--gold-300)}
.burger{width:44px;height:44px;border:1px solid var(--gold-line);background:transparent;border-radius:8px;color:var(--ivory);display:grid;place-items:center;cursor:pointer}
.hdr .btn{display:none}
@media(max-width:900px){
  .nav{position:fixed;inset:0 0 0 auto;width:min(86%,340px);background:var(--navy-950);flex-direction:column;padding:88px 24px 24px;gap:0;transform:translateX(100%);transition:transform .35s var(--ease);border-left:1px solid var(--gold-line);z-index:110;visibility:hidden}
  .nav a{padding:16px 6px;border-bottom:1px solid var(--navy-line);font-size:15px}.nav a::after{display:none}
  .nav-open .nav{transform:none;visibility:visible}
  .burger{position:relative;z-index:120}
  .scrim{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:105;opacity:0;pointer-events:none;transition:opacity .3s}.nav-open .scrim{opacity:1;pointer-events:auto}
  .nav-open{overflow:hidden}
}
@media(min-width:901px){
  :root{--hdr:72px}.topbar{display:block}.burger,.hdr-call{display:none}.hdr .btn{display:inline-flex}.scrim{display:none}
}

/* ===== Buttons / cards ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55em;min-height:46px;padding:0 26px;border-radius:999px;border:1px solid var(--gold-500);font:600 15px/1 "Be Vietnam Pro",sans-serif;color:var(--gold-300);background:transparent;cursor:pointer;position:relative;overflow:hidden;transition:transform .15s,box-shadow .3s,background .3s}
.btn::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,transparent 35%,rgba(255,255,255,.45) 50%,transparent 65%);transform:translateX(-120%);transition:transform .5s var(--ease)}
.btn:hover::after{transform:translateX(120%)}.btn:active{transform:scale(.97)}
.btn-gold{background:var(--gold-grad);color:var(--navy-950);border-color:transparent}
.btn-gold:hover{box-shadow:0 0 24px rgba(212,168,75,.35)}.btn-line:hover{background:rgba(212,168,75,.12)}
.btn.sm{min-height:44px;padding:0 18px;font-size:14px}.btn[disabled]{opacity:.6;cursor:wait}
.card{background:var(--navy-800);border:1px solid var(--gold-line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s var(--ease),border-color .3s,box-shadow .3s}
.card-b{padding:20px}
.ph{display:block;aspect-ratio:16/10;overflow:hidden;background:var(--navy-700)}
.ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
@media(hover:hover){.card:hover{transform:translateY(-6px);border-color:var(--gold-500);box-shadow:var(--shadow),0 0 24px rgba(212,168,75,.25)}.card:hover .ph img,.shot:hover img{transform:scale(1.05)}}
.grid{display:grid;gap:22px}.g3{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}.g2{grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr))}
.row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.meta{display:flex;align-items:center;flex-wrap:wrap;gap:6px 14px;color:var(--muted);font-size:14.5px}.meta .i{color:var(--gold-500)}

/* ===== Sections ===== */
.sec{padding:clamp(48px,8vw,92px) 0}.sec.alt{background:var(--navy-800)}
.sec-h{text-align:center;max-width:720px;margin:0 auto clamp(28px,5vw,48px)}
.sec-h p{color:var(--muted)}
.sec-h::after{content:"";display:block;width:140px;height:9px;margin:18px auto 0;background:linear-gradient(90deg,transparent,var(--gold-500)) left/calc(50% - 10px) 1px no-repeat,linear-gradient(270deg,transparent,var(--gold-500)) right/calc(50% - 10px) 1px no-repeat;position:relative}
.sec-h::before{content:"";order:2}
.lead{font-size:1.06rem;color:var(--ivory)}.muted{color:var(--muted)}.gold{color:var(--gold-500)}
.split{display:grid;gap:36px;align-items:center}@media(min-width:900px){.split{grid-template-columns:1fr 1fr;gap:64px}}
.frame{position:relative}.frame::before{content:"";position:absolute;inset:14px -14px -14px 14px;border:1px solid var(--gold-500);border-radius:var(--r);z-index:-1}
.frame img{border-radius:var(--r);width:100%;aspect-ratio:4/5;object-fit:cover}
.ticks{list-style:none;padding:0;margin:0 0 1.2em;display:grid;gap:8px}.ticks li{display:flex;gap:10px}.ticks .i{color:var(--gold-500);margin-top:.3em}

/* ===== Hero ===== */
.hero{position:relative;height:100vh;height:100svh;min-height:560px;max-height:1000px;display:grid;align-items:end;overflow:hidden;isolation:isolate}
.hero-bg,.hero video{position:absolute;inset:0;width:100%;height:100%}
.hero-bg{z-index:-3}.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center 40%}
.hero video{object-fit:cover;object-position:center 40%;opacity:0;transition:opacity .8s;z-index:-2}.hero video.on{opacity:1}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(5,12,31,.35),rgba(5,12,31,.85));pointer-events:none}
.hero-in{padding:calc(var(--hdr) + 60px) 0 clamp(72px,12vh,110px);text-align:center}
.hero-in>*{margin-inline:auto}
.hero h1{color:var(--gold-500);margin-bottom:.25em;text-shadow:0 2px 20px rgba(0,0,0,.5)}
.hero .addr{font-weight:500;letter-spacing:.04em}.hero .desc{max-width:560px;color:var(--ivory);opacity:.92}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:22px}
.chips span{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid var(--gold-line);border-radius:999px;background:rgba(5,12,31,.55);font-size:14px}
.chips .i{color:var(--gold-500)}
.hero .row{justify-content:center;margin-top:24px}
.vctl{position:absolute;right:16px;top:calc(var(--hdr) + 14px);width:44px;height:44px;border-radius:50%;border:1px solid var(--gold-line);background:rgba(5,12,31,.55);color:var(--ivory);display:none;place-items:center;cursor:pointer}.vctl.on{display:grid}
.cue{position:absolute;left:50%;bottom:18px;width:26px;height:26px;margin-left:-13px;color:var(--gold-300);animation:bob 1.6s infinite;transform:rotate(180deg)}
@keyframes bob{50%{transform:rotate(180deg) translateY(6px)}}
.hero-in .e{animation:rise .7s var(--ease) both;animation-delay:calc(var(--n,0)*.09s)}
@keyframes rise{from{opacity:0;transform:translateY(24px)}}
@media(min-width:1000px){.hero-in{text-align:left}.hero-in>*{margin-inline:0}.hero .row,.chips{justify-content:flex-start}}
.phero{padding:calc(var(--hdr) + 48px) 0 44px;text-align:center;background:radial-gradient(ellipse at 50% 0,var(--navy-700),var(--navy-900) 70%)}
@media(min-width:901px){.phero{padding-top:calc(var(--hdr) + 88px)}}
.phero h1{font-size:clamp(30px,5vw,54px);color:var(--gold-500);margin-bottom:.2em}.phero p{color:var(--muted);max-width:620px;margin-inline:auto}
.crumbs{font-size:14px;color:var(--muted);margin-bottom:10px}.crumbs a:hover{color:var(--gold-300)}

/* ===== Quick contact cards ===== */
.quick{margin-top:-44px;position:relative;z-index:5}
.qgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr));gap:14px}
.qcard{display:flex;align-items:center;gap:14px;padding:16px 18px;background:var(--navy-800);border:1px solid var(--gold-line);border-radius:var(--r);box-shadow:var(--shadow);min-height:72px;transition:border-color .3s,transform .3s var(--ease)}
.qcard:hover{border-color:var(--gold-500)}.qcard .ic{width:46px;height:46px;border-radius:50%;border:1px solid var(--gold-500);display:grid;place-items:center;color:var(--gold-500);flex:none}
.qcard b{display:block;font-size:15px}.qcard span{color:var(--muted);font-size:14px}
.qcard.z .ic{color:#fff;background:var(--zalo);border-color:var(--zalo);font:700 12px/1 "Be Vietnam Pro"}

/* ===== Slider / gallery / lightbox ===== */
.slider-wrap{position:relative}
.slider{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;padding:6px 20px;-webkit-overflow-scrolling:touch}
.slider::-webkit-scrollbar{display:none}
.slide{flex:0 0 min(86%,680px);scroll-snap-align:center;margin:0;position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--gold-line)}
.slide img{width:100%;aspect-ratio:3/2;object-fit:cover}
.slide figcaption,.shot figcaption{position:absolute;left:0;right:0;bottom:0;padding:34px 18px 14px;background:linear-gradient(transparent,rgba(5,12,31,.85));font-weight:500;pointer-events:none}
.s-btn{position:absolute;top:50%;width:46px;height:46px;margin-top:-23px;border-radius:50%;border:1px solid var(--gold-500);background:rgba(5,12,31,.7);color:var(--gold-300);display:none;place-items:center;cursor:pointer;z-index:2}
.s-btn.prev{left:8px}.s-btn.next{right:8px}@media(min-width:900px){.s-btn{display:grid}}
.dots{display:flex;justify-content:center;gap:4px;margin-top:14px}
.dots button{width:24px;height:24px;border:0;background:transparent;cursor:pointer;display:grid;place-items:center;padding:0}
.dots button::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--navy-line);transition:.3s}.dots button[aria-current]::before{background:var(--gold-500);width:22px;border-radius:8px}
.shots{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr))}
.shot{position:relative;display:block;margin:0;border-radius:var(--r);overflow:hidden;border:1px solid var(--gold-line);aspect-ratio:3/2}
.shot img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.lb{position:fixed;inset:0;z-index:300;background:rgba(3,8,20,.94);display:grid;place-items:center;opacity:0;pointer-events:none;transition:opacity .25s}
.lb.open{opacity:1;pointer-events:auto}.lb figure{margin:0;max-width:min(1100px,94vw);text-align:center}
.lb img{max-height:78vh;width:auto;margin:auto;border-radius:var(--r);transform:scale(.96);transition:transform .25s var(--ease)}.lb.open img{transform:none}
.lb figcaption{margin-top:12px;color:var(--muted)}
.lb button{position:absolute;width:48px;height:48px;border-radius:50%;border:1px solid var(--gold-500);background:rgba(5,12,31,.7);color:var(--gold-300);display:grid;place-items:center;cursor:pointer}
.lb .x{top:max(14px,env(safe-area-inset-top));right:14px}.lb .p{left:12px;top:50%}.lb .n{right:12px;top:50%}

/* ===== Features / steps / rating / FAQ ===== */
.feat{padding:24px;text-align:left}.feat .ic{width:52px;height:52px;border:1px solid var(--gold-500);border-radius:50%;display:grid;place-items:center;color:var(--gold-500);margin-bottom:14px}.feat .ic .i{width:26px;height:26px}
.feat p{color:var(--muted);margin:0}
.steps{counter-reset:s;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr))}
.step{text-align:center;padding:10px 16px}.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:54px;height:54px;margin:0 auto 14px;border-radius:50%;background:var(--gold-grad);color:var(--navy-950);font:700 22px "Playfair Display",serif}
.step p{color:var(--muted);margin:0}
.rate{text-align:center}.rate .big{font:700 clamp(54px,9vw,84px)/1 "Playfair Display",serif;background:var(--gold-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stars{display:flex;justify-content:center;gap:4px;color:var(--gold-500);margin:6px 0}.stars .i{fill:currentColor}
details{background:var(--navy-800);border:1px solid var(--gold-line);border-radius:var(--r);margin-bottom:10px}
summary{cursor:pointer;list-style:none;padding:16px 52px 16px 18px;font-weight:600;position:relative;min-height:52px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:18px;top:50%;margin-top:-14px;font-size:24px;line-height:28px;color:var(--gold-500);transition:transform .3s}
details[open] summary::after{transform:rotate(45deg)}details>div{padding:0 18px 16px;color:var(--muted)}
.tbl{overflow-x:auto;border:1px solid var(--gold-line);border-radius:var(--r)}
table{width:100%;border-collapse:collapse;min-width:520px}th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--navy-line)}
th{color:var(--gold-300);font-weight:600;background:var(--navy-800)}tr:last-child td{border:0}
.note{padding:14px 18px;border:1px dashed var(--gold-700);border-radius:var(--r);color:var(--muted);font-size:15px}

/* ===== Map ===== */
.map{border:1px solid var(--gold-line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);background:var(--navy-700)}
.map iframe{width:100%;height:clamp(300px,52vw,460px);border:0}
.mapbar{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
#geoMsg{min-height:1.6em;margin-top:12px;color:var(--gold-300)}

/* ===== CTA / footer ===== */
.cta{position:relative;text-align:center;padding:clamp(64px,10vw,110px) 0;background:linear-gradient(rgba(5,12,31,.72),rgba(5,12,31,.82)),url(../assets/images/cta/cta.jpg) center calc(50% + var(--py,0px))/cover;border-block:1px solid var(--gold-line)}
.cta .row{justify-content:center}
.ftr{background:var(--navy-950);border-top:1px solid var(--gold-line);padding:56px 0 28px;color:var(--muted);font-size:15px}
.fgrid{display:grid;gap:32px;grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr))}
.ftr h3{font-size:1rem;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-500)}
.ftr address{font-style:normal}.ftr ul{list-style:none;margin:0;padding:0}.ftr li{margin-bottom:4px}
.ftr a:hover{color:var(--gold-300)}.ftr .lk a{display:inline-block;padding:6px 0;min-height:32px}
.copy{border-top:1px solid var(--navy-line);margin-top:34px;padding-top:20px;font-size:14px;text-align:center}
@media(max-width:900px){.ftr{padding-bottom:calc(88px + env(safe-area-inset-bottom))}}

/* ===== Floating buttons ===== */
.fab{position:fixed;right:16px;bottom:24px;z-index:90;display:none;flex-direction:column;gap:10px}
.fab a,.fab button{width:50px;height:50px;border-radius:50%;border:1px solid var(--gold-500);background:rgba(8,20,47,.92);color:var(--gold-300);display:grid;place-items:center;cursor:pointer;font:700 12px "Be Vietnam Pro";box-shadow:var(--shadow)}
.fab .call{animation:ring 2.2s infinite}.fab .zl{background:var(--zalo);border-color:var(--zalo);color:#fff}
@keyframes ring{0%{box-shadow:0 0 0 0 rgba(212,168,75,.55)}70%,100%{box-shadow:0 0 0 16px rgba(212,168,75,0)}}
.bar{position:fixed;inset:auto 0 0 0;z-index:90;display:grid;grid-template-columns:1fr 1fr 1.25fr 1fr;align-items:end;min-height:60px;padding-bottom:env(safe-area-inset-bottom);background:rgba(5,12,31,.96);border-top:1px solid var(--gold-line);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.bar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:60px;font-size:12.5px;font-weight:500;color:var(--ivory)}
.bar a .i{color:var(--gold-500)}.bar .book{margin:-14px 6px 6px;min-height:58px;border-radius:14px;background:var(--gold-grad);color:var(--navy-950);font-weight:700;box-shadow:0 6px 20px rgba(212,168,75,.35)}.bar .book .i{color:var(--navy-950)}
@media(min-width:901px){.fab{display:flex}.bar{display:none}}
@media(max-width:900px){body{padding-bottom:calc(64px + env(safe-area-inset-bottom))}}

/* ===== Forms ===== */
.form{display:grid;gap:16px;grid-template-columns:1fr 1fr}.form .full{grid-column:1/-1}@media(max-width:560px){.form{grid-template-columns:1fr}}
label{display:block;font-size:14.5px;font-weight:500;margin-bottom:6px}
input,select,textarea{width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r);border:1px solid var(--navy-line);background:var(--navy-950);color:var(--ivory);font:inherit;font-size:16px}
textarea{min-height:110px;resize:vertical}input:focus,select:focus,textarea:focus{border-color:var(--gold-500);outline:0;box-shadow:0 0 0 3px rgba(212,168,75,.2)}
input[aria-invalid=true],select[aria-invalid=true]{border-color:var(--err)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.status{padding:12px 16px;border-radius:var(--r);display:none}.status.show{display:block}.status.bad{background:rgba(255,123,128,.1);border:1px solid var(--err);color:#ffd5d6}
.okbox{text-align:center;padding:40px 20px;border:1px solid var(--ok);border-radius:var(--r);background:rgba(47,191,138,.08);display:none}.okbox.show{display:block}

/* ===== Reveal ===== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease);transition-delay:var(--d,0s)}.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.hero-in .e,.cue,.fab .call{animation:none}
  .btn::after{display:none}*{transition-duration:.01ms!important}
}
@media(hover:none){.card:hover{transform:none}}