/* =====================================================================
   VIÊN MINH ĐĂNG — AUDIT & MARKETING PROPOSAL (microsite)
   ===================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Be+Vietnam+Pro:wght@300;400;500;600;700&display=swap');

:root {
  --paper:#F4EEE2; --paper-2:#EDE5D5; --paper-3:#E4D9C4;
  --ink:#221E18; --ink-soft:#554E43; --ink-mute:#8C8171;
  --gold:#A67C3D; --gold-lt:#C29A5A; --gold-deep:#7E5E2B;
  --red:#B5533B; --green:#5E7A52;
  --line:rgba(34,30,24,.14); --line-soft:rgba(34,30,24,.08);
  --shadow:0 24px 60px -28px rgba(34,30,24,.45); --shadow-sm:0 10px 30px -18px rgba(34,30,24,.5);
  --serif:'Playfair Display',Georgia,serif; --sans:'Be Vietnam Pro',system-ui,sans-serif;
  --ease:cubic-bezier(.22,1,.36,1); --wrap:1180px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.7;overflow-x:hidden;position:relative}
body::before{content:"";position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.4;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.045'/%3E%3C/svg%3E")}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
::selection{background:var(--gold);color:var(--paper)}
h1,h2,h3,h4,.serif{font-family:var(--serif);font-weight:500;line-height:1.14;letter-spacing:-.01em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px;position:relative;z-index:2}
section{position:relative;z-index:2}

.eyebrow{font-size:.72rem;letter-spacing:.32em;text-transform:uppercase;color:var(--gold-deep);font-weight:600;display:inline-flex;align-items:center;gap:.8em}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--gold);display:inline-block}
.eyebrow.center::after{content:"";width:30px;height:1px;background:var(--gold);display:inline-block}

.btn{display:inline-flex;align-items:center;gap:.6em;padding:.95em 1.9em;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;font-weight:600;border-radius:2px;transition:all .4s var(--ease)}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--gold-deep);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-ghost{border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-deep);transform:translateY(-2px)}
.btn-gold{background:var(--gold);color:#fff}
.btn-gold:hover{background:var(--gold-deep);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn .arrow{transition:transform .4s var(--ease)}.btn:hover .arrow{transform:translateX(4px)}

/* progress bar top */
.progress{position:fixed;top:0;left:0;height:3px;background:var(--gold);z-index:200;width:0;transition:width .1s}

/* header */
.header{position:fixed;top:0;left:0;right:0;z-index:100;padding:20px 0;transition:all .5s var(--ease)}
.header.scrolled{padding:12px 0;background:rgba(244,238,226,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-soft)}
.header-inner{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:36px;height:36px;border-radius:50%;border:1px solid var(--gold);display:grid;place-items:center;color:var(--gold-deep);font-family:var(--serif);font-size:1.1rem}
.brand-name{display:block;font-family:var(--serif);font-size:1.15rem;line-height:1}
.brand-sub{display:block;font-size:.58rem;letter-spacing:.28em;text-transform:uppercase;color:var(--ink-mute);margin-top:4px}
.nav{display:flex;gap:30px}
.nav a{font-size:.8rem;letter-spacing:.03em;color:var(--ink-soft);position:relative;transition:color .3s}
.nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--gold);transition:width .4s var(--ease)}
.nav a:hover{color:var(--ink)}.nav a:hover::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:26px}
.nav-toggle span{height:1.5px;background:var(--ink);transition:all .35s}

/* hero */
.hero{min-height:100vh;display:flex;align-items:center;padding:150px 0 90px;background:radial-gradient(120% 90% at 80% 15%,var(--paper-2),var(--paper) 60%);overflow:hidden}
.hero-doc{font-size:.74rem;letter-spacing:.28em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:26px;display:flex;gap:20px;flex-wrap:wrap}
.hero h1{font-size:clamp(2.6rem,6.5vw,5rem);margin:0 0 28px;max-width:15ch}
.hero h1 em{font-style:italic;color:var(--gold-deep)}
.hero-lead{font-size:1.12rem;color:var(--ink-soft);font-weight:300;max-width:600px;margin-bottom:40px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:64px}
.hero-kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;border-top:1px solid var(--line);padding-top:36px}
.kpi .num{font-family:var(--serif);font-size:clamp(1.8rem,3vw,2.6rem);color:var(--gold-deep);line-height:1}
.kpi .lbl{font-size:.76rem;color:var(--ink-mute);margin-top:8px;letter-spacing:.02em}

/* section */
.section{padding:120px 0}
.section.tight{padding:96px 0}
.section-head{max-width:680px;margin-bottom:64px}
.section-head.center{margin:0 auto 64px;text-align:center}
.section-head h2{font-size:clamp(2rem,4vw,3rem);margin:18px 0 18px}
.section-head p{color:var(--ink-soft);font-weight:300;font-size:1.04rem}
.section-num{font-family:var(--serif);font-style:italic;color:var(--gold);font-size:1rem;margin-bottom:6px;display:block}

/* snapshot cards */
.snap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.snap{background:var(--paper-2);border:1px solid var(--line-soft);border-radius:5px;padding:34px 30px;transition:all .4s var(--ease)}
.snap:hover{transform:translateY(-5px);box-shadow:var(--shadow-sm)}
.snap .ic{color:var(--gold);margin-bottom:16px}
.snap h3{font-size:1.25rem;margin-bottom:10px}
.snap p{font-size:.92rem;color:var(--ink-soft);font-weight:300}

/* AUDIT dark section */
.audit{background:var(--ink);color:var(--paper)}
.audit .eyebrow{color:var(--gold-lt)}.audit .eyebrow::before,.audit .eyebrow::after{background:var(--gold-lt)}
.audit .section-head h2{color:var(--paper)}
.audit .section-head p{color:rgba(244,238,226,.65)}
.channel{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px;margin-bottom:24px}
.ch-card{background:rgba(244,238,226,.04);border:1px solid rgba(244,238,226,.12);border-radius:6px;padding:34px 30px}
.ch-card .ch-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.ch-name{font-family:var(--serif);font-size:1.3rem;color:var(--paper)}
.ch-tag{font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;padding:5px 11px;border-radius:20px;font-weight:600}
.tag-good{background:rgba(94,122,82,.25);color:#a9c99a}
.tag-warn{background:rgba(181,83,59,.22);color:#e0a08c}
.tag-mid{background:rgba(194,154,90,.2);color:var(--gold-lt)}
.ch-stat{display:flex;justify-content:space-between;align-items:baseline;padding:12px 0;border-bottom:1px solid rgba(244,238,226,.09)}
.ch-stat:last-child{border-bottom:none}
.ch-stat .v{font-family:var(--serif);font-size:1.5rem;color:var(--paper)}
.ch-stat .k{font-size:.8rem;color:rgba(244,238,226,.55)}
.ch-note{font-size:.85rem;color:rgba(244,238,226,.6);font-weight:300;margin-top:18px;line-height:1.6}

/* bar chart */
.chart{background:rgba(244,238,226,.04);border:1px solid rgba(244,238,226,.12);border-radius:6px;padding:36px 34px}
.chart h4{color:var(--paper);font-size:1.15rem;margin-bottom:26px}
.bar-row{display:grid;grid-template-columns:120px 1fr 54px;align-items:center;gap:16px;margin-bottom:16px}
.bar-lbl{font-size:.84rem;color:rgba(244,238,226,.75)}
.bar-track{height:12px;background:rgba(244,238,226,.08);border-radius:8px;overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--gold-deep),var(--gold-lt));border-radius:8px;width:0;transition:width 1.2s var(--ease)}
.bar-val{font-size:.85rem;color:var(--gold-lt);text-align:right;font-weight:600}

/* audit charts row — no stretch, top aligned */
.audit-charts{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px;align-items:start}
/* ads audit strip */
.ads-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:22px;align-items:start}
.ads-strip.ads-2x2{grid-template-columns:1fr 1fr}
.ad-mini{background:rgba(244,238,226,.04);border:1px solid rgba(244,238,226,.12);border-radius:6px;padding:18px 18px 16px;display:flex;flex-direction:column;gap:10px}
.ad-mini .dot{width:7px;height:7px;border-radius:50%;background:#7ec87e;display:inline-block;margin-right:7px;box-shadow:0 0 0 3px rgba(126,200,126,.2)}
.ad-mini .st{font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:#a9c99a;display:flex;align-items:center}
.ad-mini .tx{font-size:.82rem;color:rgba(244,238,226,.72);font-weight:300;line-height:1.5}
.ad-mini .cta{font-size:.68rem;color:var(--gold-lt);letter-spacing:.08em;text-transform:uppercase;padding:10px 0 0;margin:0;background:none;text-align:left;border-top:1px solid rgba(244,238,226,.1)}

/* problems */
.prob-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-bottom:60px}
.prob{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:38px 32px;position:relative;overflow:hidden}
.prob::before{content:"";position:absolute;top:0;left:0;width:3px;height:100%;background:var(--red)}
.prob .pn{font-family:var(--serif);font-style:italic;font-size:1.3rem;color:var(--red);margin-bottom:14px}
.prob h3{font-size:1.3rem;margin-bottom:12px}
.prob p{font-size:.92rem;color:var(--ink-soft);font-weight:300}
/* diagnosis table */
.diag{width:100%;border-collapse:collapse;background:var(--paper-2);border-radius:6px;overflow:hidden}
.diag th,.diag td{text-align:left;padding:18px 22px;border-bottom:1px solid var(--line-soft);font-size:.92rem;vertical-align:top}
.diag th{font-family:var(--serif);font-weight:500;font-size:1rem;background:var(--paper-3)}
.diag td:first-child{color:var(--ink);font-weight:500;width:38%}
.diag td:last-child{color:var(--ink-soft);font-weight:300}
.diag tr:last-child td{border-bottom:none}

/* strategy approaches */
.appr-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:70px}
.appr{background:var(--paper-2);border:1px solid var(--line-soft);border-radius:8px;padding:44px 40px;position:relative;transition:all .4s var(--ease)}
.appr:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.appr.rec{border:1px solid var(--gold);background:linear-gradient(180deg,rgba(166,124,61,.06),var(--paper-2))}
.appr-badge{position:absolute;top:-13px;left:40px;background:var(--gold-deep);color:#fff;font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;padding:6px 16px;border-radius:20px;font-weight:600}
.appr .tag{font-family:var(--serif);font-style:italic;font-size:2.2rem;color:var(--gold);line-height:1}
.appr h3{font-size:1.5rem;margin:12px 0 16px}
.appr>p{color:var(--ink-soft);font-weight:300;margin-bottom:24px;font-size:.96rem}
.appr .pros li,.appr .cons li{list-style:none;font-size:.9rem;padding:7px 0 7px 26px;position:relative;color:var(--ink-soft)}
.appr .pros li::before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:700}
.appr .cons li::before{content:"–";position:absolute;left:2px;color:var(--red);font-weight:700}
.appr .sub{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);margin:20px 0 8px;font-weight:600}

/* content tracks */
.tracks{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.track{border-radius:8px;padding:44px 40px}
.track-1{background:var(--ink);color:var(--paper)}
.track-2{background:var(--gold-deep);color:#fff}
.track .tk-lbl{font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;opacity:.7;margin-bottom:14px}
.track h3{font-size:1.7rem;margin-bottom:8px;color:#fff}
.track .tk-role{font-style:italic;font-family:var(--serif);opacity:.85;margin-bottom:24px}
.track ul{list-style:none;display:flex;flex-direction:column;gap:14px}
.track li{padding-left:24px;position:relative;font-size:.94rem;font-weight:300;opacity:.92}
.track li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;background:var(--gold-lt)}
.track-2 li::before{background:rgba(255,255,255,.6)}

/* demo showcase */
.demo{background:var(--paper-2);overflow:hidden}
.demo-frame{position:relative;border-radius:10px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line)}
.demo-frame img{width:100%;display:block}
.demo-bar{background:var(--paper-3);padding:12px 18px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--line)}
.demo-bar .d{width:11px;height:11px;border-radius:50%;background:var(--ink-mute);opacity:.4}
.demo-bar .u{margin-left:14px;font-size:.78rem;color:var(--ink-mute);font-family:var(--sans)}
.demo-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:26px;margin-top:30px}
.demo-note{background:var(--paper);border:1px solid var(--line-soft);border-radius:8px;padding:30px}
.demo-note h4{font-size:1.15rem;margin-bottom:12px}
.demo-note p{font-size:.9rem;color:var(--ink-soft);font-weight:300;margin-bottom:14px}
.demo-mob{max-width:230px;margin:0 auto;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);border:5px solid var(--ink)}

/* roadmap timeline */
.timeline{position:relative;margin-top:20px}
.timeline::before{content:"";position:absolute;left:22px;top:8px;bottom:8px;width:2px;background:var(--line)}
.tl-item{position:relative;padding:0 0 44px 66px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:12px;top:2px;width:22px;height:22px;border-radius:50%;background:var(--paper);border:2px solid var(--gold);display:grid;place-items:center}
.tl-dot::after{content:"";width:8px;height:8px;border-radius:50%;background:var(--gold)}
.tl-ph{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-deep);font-weight:600;margin-bottom:6px}
.tl-item h3{font-size:1.35rem;margin-bottom:10px}
.tl-item p{color:var(--ink-soft);font-weight:300;font-size:.94rem;max-width:640px}

/* MOODBOARD */
.mood-block{margin-bottom:70px}
.mood-block:last-child{margin-bottom:0}
.mood-cap{display:flex;align-items:flex-start;gap:20px;margin-bottom:30px;flex-wrap:wrap}
.mood-cap .mc-tag{font-family:var(--serif);font-style:italic;font-size:2rem;color:var(--gold);line-height:1;flex-shrink:0}
.mood-cap h3{font-size:1.6rem;margin-bottom:6px}
.mood-cap p{color:var(--ink-soft);font-weight:300;font-size:.95rem;max-width:560px}
.mood-cap .mc-txt{flex:1;min-width:260px}
.mood-grid{columns:3;column-gap:16px}
.mood-grid img{width:100%;margin-bottom:16px;border-radius:5px;break-inside:avoid;box-shadow:var(--shadow-sm);cursor:zoom-in;transition:transform .5s var(--ease),box-shadow .5s var(--ease);display:block}
.mood-grid img:hover{transform:translateY(-4px) scale(1.01);box-shadow:var(--shadow)}
/* product block dark treatment */
.mood-dark{background:var(--ink);border-radius:12px;padding:48px 44px;margin:0 -4px 70px}
.mood-dark .mc-tag{color:var(--gold-lt)}
.mood-dark h3{color:var(--paper)}
.mood-dark p{color:rgba(244,238,226,.6)}
.mood-story{background:var(--paper-3);border-radius:12px;padding:48px 44px}
.mood-story .mood-grid{columns:3}
/* video row */
.video-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:20px}
.vcard{border-radius:12px;overflow:hidden;box-shadow:var(--shadow);background:#000;position:relative;aspect-ratio:9/16}
.vcard video{width:100%;height:100%;object-fit:cover;display:block}
.vcard .vplay{position:absolute;inset:0;display:grid;place-items:center;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.35));cursor:pointer;transition:opacity .4s;z-index:2}
.vcard .vplay svg{width:60px;height:60px;color:#fff;opacity:.92;filter:drop-shadow(0 4px 12px rgba(0,0,0,.5));transition:transform .4s var(--ease)}
.vcard .vplay:hover svg{transform:scale(1.12)}
.vcard.playing .vplay{opacity:0;pointer-events:none}
.vcard .vlabel{position:absolute;bottom:14px;left:14px;z-index:3;color:#fff;font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;background:rgba(0,0,0,.45);backdrop-filter:blur(4px);padding:5px 12px;border-radius:20px;pointer-events:none}
/* image lightbox */
.lightbox{position:fixed;inset:0;z-index:210;display:none;align-items:center;justify-content:center;padding:32px;background:rgba(20,17,13,.86);backdrop-filter:blur(8px);cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox img{max-width:92vw;max-height:90vh;border-radius:6px;box-shadow:var(--shadow);animation:pop .4s var(--ease)}
@keyframes pop{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}

@media(max-width:980px){
  .mood-grid,.mood-story .mood-grid{columns:2}
  .mood-dark,.mood-story{padding:34px 24px;margin-left:0;margin-right:0}
  .video-row{grid-template-columns:1fr 1fr;gap:16px}
}
@media(max-width:520px){
  .mood-grid,.mood-story .mood-grid{columns:2;column-gap:10px}
  .mood-grid img{margin-bottom:10px}
  .video-row{grid-template-columns:1fr 1fr;gap:12px}
}

/* CTA */
.cta{background:var(--ink);color:var(--paper);text-align:center;padding:120px 0}
.cta .eyebrow{color:var(--gold-lt)}.cta .eyebrow::before,.cta .eyebrow::after{background:var(--gold-lt)}
.cta h2{font-size:clamp(2.2rem,4.5vw,3.6rem);color:var(--paper);margin:22px 0 22px}
.cta h2 em{font-style:italic;color:var(--gold-lt)}
.cta p{color:rgba(244,238,226,.7);font-weight:300;max-width:560px;margin:0 auto 40px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* footer */
.footer{background:var(--paper-2);padding:60px 0;border-top:1px solid var(--line-soft);text-align:center}
.footer p{font-size:.84rem;color:var(--ink-mute)}
.footer .fb-brand{font-family:var(--serif);font-size:1.3rem;color:var(--ink);margin-bottom:10px}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}

/* responsive */
@media(max-width:980px){
  .nav{display:none}.nav-toggle{display:flex}
  .nav.open{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:18px;background:var(--paper);padding:26px 32px;box-shadow:var(--shadow-sm);border-bottom:1px solid var(--line)}
  .snap-grid,.prob-grid,.channel{grid-template-columns:1fr}
  .audit-charts{grid-template-columns:1fr;gap:20px}
  .hero-kpis{grid-template-columns:1fr 1fr;gap:24px}
  .appr-grid,.tracks,.demo-grid{grid-template-columns:1fr}
  .section{padding:84px 0}
  .diag th,.diag td{padding:14px 16px;font-size:.86rem}
}
@media(max-width:520px){
  .wrap{padding:0 20px}
  .hero-kpis{grid-template-columns:1fr 1fr;gap:18px}
  .bar-row{grid-template-columns:88px 1fr 40px;gap:10px}
  .diag{font-size:.8rem}
}