/* =========================================================
   VĂN HÓA THÁI NGUYÊN TRONG EM — Heritage editorial design
   Bảng màu: xanh chè · vàng đồng · giấy kem · đỏ thổ cẩm
   ========================================================= */
:root{
  --tea-950:#0b2117; --tea-900:#123524; --tea-800:#1a4a32; --tea-700:#23603f; --tea-600:#2e7a50;
  --tea-500:#479466; --tea-300:#a9d2b4; --tea-100:#e3efe3; --tea-50:#f2f7f0;
  --gold-700:#8f6a22; --gold-600:#b08530; --gold-500:#c9a24b; --gold-300:#e6cf94; --gold-100:#f7eed6;
  --brocade:#a63d2f; --brocade-100:#f6e3de;
  --ink:#1c2620; --ink-2:#38463d; --muted:#6b776f; --line:#e4e0d2; --line-2:#d8d2bf;
  --paper:#fbf8f1; --paper-2:#f5f0e3; --white:#fff;
  --radius:18px; --radius-sm:12px;
  --shadow-sm:0 2px 8px rgba(18,53,36,.06);
  --shadow:0 18px 40px -18px rgba(18,53,36,.28);
  --shadow-lg:0 30px 60px -20px rgba(11,33,23,.45);
  --font-body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-head:"Playfair Display","Lora",Georgia,serif;
  --ease:cubic-bezier(.2,.7,.2,1);
  --brocade-svg:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='16' viewBox='0 0 48 16'%3E%3Cg fill='none' stroke-width='2'%3E%3Cpath d='M0 8 L8 0 L16 8 L8 16 Z' stroke='%23c9a24b'/%3E%3Cpath d='M24 8 L32 0 L40 8 L32 16 Z' stroke='%23a63d2f'/%3E%3Cpath d='M16 8h8M40 8h8' stroke='%23c9a24b'/%3E%3Ccircle cx='8' cy='8' r='2' fill='%23a63d2f' stroke='none'/%3E%3Ccircle cx='32' cy='8' r='2' fill='%23c9a24b' stroke='none'/%3E%3C/g%3E%3C/svg%3E");
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
html,body{overflow-x:clip}
body{margin:0;font-family:var(--font-body);color:var(--ink);background:var(--paper);line-height:1.75;font-size:17px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:var(--tea-700);text-underline-offset:3px}
::selection{background:var(--gold-300);color:var(--tea-950)}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.25;color:var(--tea-900);margin:0 0 .55em;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(1.65rem,3.2vw,2.4rem)}
h3{font-size:1.32rem}
p{margin:0 0 1.05em}
.container{width:min(1200px,92%);margin-inline:auto}
.narrow{width:min(860px,92%);margin-inline:auto}

/* ---------- Progress + top button ---------- */
.progress-bar{position:fixed;top:0;left:0;height:3px;width:0;z-index:120;background:linear-gradient(90deg,var(--gold-500),var(--brocade));transition:width .1s linear}
.to-top{position:fixed;left:22px;bottom:22px;z-index:80;width:46px;height:46px;border-radius:50%;border:1px solid var(--line-2);background:rgba(255,255,255,.92);color:var(--tea-800);font-size:1.1rem;cursor:pointer;box-shadow:var(--shadow-sm);opacity:0;transform:translateY(10px);pointer-events:none;transition:.3s var(--ease)}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{background:var(--tea-800);color:#fff}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(251,248,241,.82);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s,background .3s}
.site-header.scrolled{border-color:var(--line);box-shadow:0 6px 24px -12px rgba(18,53,36,.18);background:rgba(251,248,241,.94)}
.site-header .bar{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:74px;transition:min-height .3s}
.site-header.scrolled .bar{min-height:62px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--tea-900);flex-shrink:0}
.brand-logo{width:44px;height:44px;border-radius:14px;background:linear-gradient(145deg,var(--tea-600),var(--tea-900));display:grid;place-items:center;color:#fff;font-size:22px;box-shadow:0 6px 16px -6px rgba(18,53,36,.6),inset 0 0 0 1px rgba(255,255,255,.12);position:relative}
.brand-logo::after{content:"";position:absolute;inset:-4px;border-radius:17px;border:1px solid var(--gold-500);opacity:.55}
.brand b{font-family:var(--font-head);font-size:1.08rem;display:block;line-height:1.1;letter-spacing:.02em;white-space:nowrap}
.brand small{font-size:.68rem;color:var(--gold-700);letter-spacing:.18em;text-transform:uppercase;font-weight:600}
.nav{display:flex;gap:2px;align-items:center}
.nav a{position:relative;padding:9px 12px;border-radius:10px;text-decoration:none;color:var(--ink-2);font-size:.88rem;font-weight:500;white-space:nowrap;transition:color .2s,background .2s}
.nav a:hover{color:var(--tea-900);background:var(--tea-50)}
.nav a.active{color:var(--tea-900);font-weight:700}
.nav a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--gold-500),var(--brocade))}
.nav a.nav-cta{background:var(--tea-800);color:#fff;margin-left:6px}
.nav a.nav-cta:hover{background:var(--tea-900)}
.nav a.nav-cta.active::after{display:none}
.nav-toggle{display:none;background:#fff;border:1px solid var(--line-2);border-radius:12px;width:46px;height:46px;font-size:1.25rem;cursor:pointer;color:var(--tea-900)}
.nav-backdrop{display:none}
@media (max-width:1380px){
  .nav-toggle{display:block}
  .nav{position:fixed;top:0;right:0;height:100vh;width:min(340px,86vw);background:var(--paper);flex-direction:column;align-items:stretch;gap:4px;padding:90px 20px 30px;box-shadow:var(--shadow-lg);transform:translateX(105%);transition:transform .35s var(--ease);z-index:70;overflow-y:auto;border-left:4px solid transparent;border-image:linear-gradient(var(--gold-500),var(--brocade)) 1}
  .nav{visibility:hidden;transition:transform .35s var(--ease),visibility 0s .35s}
  .nav.open{transform:none;visibility:visible;transition:transform .35s var(--ease)}
  .nav a{padding:13px 14px;font-size:1rem;border-radius:12px}
  .nav a.active{background:var(--tea-50)}
  .nav a.active::after{left:0;right:auto;top:12px;bottom:12px;width:3px;height:auto}
  .nav a.nav-cta{margin:10px 0 0;text-align:center}
  .nav-backdrop{display:block;position:fixed;inset:0;background:rgba(11,33,23,.45);opacity:0;pointer-events:none;transition:opacity .3s;z-index:65}
  .nav-backdrop.open{opacity:1;pointer-events:auto}
  .nav-toggle{position:relative;z-index:75}
}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 24px;border-radius:999px;font-weight:600;text-decoration:none;border:0;cursor:pointer;font-family:inherit;font-size:.98rem;line-height:1.2;transition:transform .2s var(--ease),box-shadow .2s,background .2s,color .2s}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(135deg,var(--gold-300),var(--gold-500));color:var(--tea-950);box-shadow:0 10px 24px -10px rgba(176,133,48,.8)}
.btn-green{background:var(--tea-800);color:#fff;box-shadow:0 10px 24px -12px rgba(18,53,36,.8)}
.btn-green:hover{background:var(--tea-900)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.45);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.18)}
.btn-outline{background:transparent;color:var(--tea-800);border:1.5px solid var(--tea-700)}
.btn-outline:hover{background:var(--tea-800);color:#fff}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}

/* ---------- Brocade band ---------- */
.pattern-band{height:16px;background:var(--brocade-svg) repeat-x center/48px 16px;opacity:.9}
.pattern-band.dim{opacity:.35}
.ornament{display:flex;align-items:center;justify-content:center;gap:12px;color:var(--gold-600);margin:0 auto 14px}
.ornament::before,.ornament::after{content:"";width:46px;height:1px;background:linear-gradient(90deg,transparent,var(--gold-500))}
.ornament::after{transform:scaleX(-1)}
.ornament span{width:10px;height:10px;transform:rotate(45deg);border:1.5px solid var(--brocade)}

/* ---------- Page hero (inner pages) ---------- */
.hero{position:relative;color:#fff;overflow:hidden;background:var(--tea-950);isolation:isolate}
.hero .bg{position:absolute;inset:-20px;background-size:cover;background-position:center;filter:blur(2px) saturate(1.1);opacity:.5;transform:scale(1.06);z-index:-2}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:radial-gradient(1200px 500px at 15% 10%,rgba(46,122,80,.35),transparent 60%),linear-gradient(100deg,rgba(11,33,23,.96) 0%,rgba(11,33,23,.82) 45%,rgba(11,33,23,.55) 100%)}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:16px;background:var(--brocade-svg) repeat-x center/48px 16px;opacity:.85}
.hero .inner{position:relative;padding:96px 0 90px}
.hero h1{color:#fff;font-size:clamp(2.1rem,5.4vw,3.9rem);margin-bottom:.35em;line-height:1.12}
.hero .kicker{display:inline-flex;align-items:center;gap:10px;color:var(--gold-300);font-weight:600;font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;margin-bottom:20px}
.hero .kicker::before{content:"";width:34px;height:1px;background:var(--gold-500)}
.hero p.lead{font-size:1.14rem;max-width:620px;color:rgba(255,255,255,.86);line-height:1.7}
.hero.small .inner{padding:64px 0 74px;display:grid;grid-template-columns:1.25fr .75fr;gap:56px;align-items:center}
.hero.small h1{font-size:clamp(1.9rem,4vw,3rem)}
.hero-frame{position:relative;margin:0;justify-self:end;width:100%;max-width:440px}
.hero-frame img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:14px;box-shadow:var(--shadow-lg);position:relative;z-index:1}
.hero-frame::before{content:"";position:absolute;top:14px;left:14px;right:-14px;aspect-ratio:4/3;border:1.5px solid var(--gold-500);border-radius:16px;opacity:.7}
.hero-frame figcaption{font-size:.78rem;color:rgba(255,255,255,.65);margin-top:12px;font-style:italic;position:relative;z-index:1}
.chapter-no{font-family:var(--font-head);font-size:5.5rem;line-height:.8;color:transparent;-webkit-text-stroke:1.2px rgba(201,162,75,.65);font-weight:700;margin-bottom:6px;display:block}
.crumbs{font-size:.82rem;color:rgba(255,255,255,.6);margin-bottom:18px}
.crumbs a{color:rgba(255,255,255,.8);text-decoration:none}
.crumbs a:hover{color:#fff}
.crumbs span{margin:0 8px;opacity:.5}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-meta span{font-size:.82rem;padding:7px 14px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.88)}
@media (max-width:900px){.hero.small .inner{grid-template-columns:1fr;gap:34px}.hero-frame{justify-self:start;max-width:calc(100% - 14px)}.chapter-no{font-size:4rem}}

/* ---------- Home hero ---------- */
.home-hero{position:relative;min-height:calc(100vh - 74px);display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--tea-950);isolation:isolate}
.home-hero .bg{position:absolute;inset:-30px;background-size:cover;background-position:center;opacity:.55;z-index:-2;animation:kenburns 28s ease-in-out infinite alternate}
@keyframes kenburns{from{transform:scale(1.05)}to{transform:scale(1.18) translate(-1.5%,-1%)}}
.home-hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(11,33,23,.97) 0%,rgba(11,33,23,.85) 42%,rgba(11,33,23,.35) 100%),linear-gradient(0deg,rgba(11,33,23,.9),transparent 40%)}
.home-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:16px;background:var(--brocade-svg) repeat-x center/48px 16px}
.home-hero .grid-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center;padding:70px 0 110px}
.home-hero h1{color:#fff;font-size:clamp(2.6rem,6.6vw,5.4rem);line-height:1.02;margin:0 0 .35em;letter-spacing:-.02em}
.home-hero h1 em{font-style:italic;font-weight:600;background:linear-gradient(90deg,var(--gold-300),var(--gold-500));-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-block;padding-right:.08em}
.home-hero .kicker{display:inline-flex;align-items:center;gap:10px;color:var(--gold-300);font-weight:600;font-size:.8rem;letter-spacing:.24em;text-transform:uppercase;margin-bottom:24px}
.home-hero .kicker::before{content:"";width:40px;height:1px;background:var(--gold-500)}
.home-hero .lead{font-size:1.18rem;color:rgba(255,255,255,.86);max-width:560px}
.collage{position:relative;height:520px}
.collage figure{position:absolute;margin:0;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg);border:4px solid rgba(255,255,255,.92)}
.collage img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease)}
.collage figure:hover img{transform:scale(1.06)}
.collage .c1{width:62%;height:58%;top:0;right:0;transform:rotate(2deg)}
.collage .c2{width:52%;height:46%;bottom:6%;left:0;transform:rotate(-3deg)}
.collage .c3{width:42%;height:38%;bottom:0;right:6%;transform:rotate(1.5deg)}
.collage .badge{position:absolute;top:44%;left:6%;z-index:3;background:var(--paper);color:var(--tea-900);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);font-size:.82rem;line-height:1.35;transform:rotate(-2deg)}
.collage .badge b{display:block;font-family:var(--font-head);font-size:1.25rem;color:var(--brocade)}
.scroll-cue{position:absolute;left:50%;bottom:40px;transform:translateX(-50%);color:rgba(255,255,255,.7);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:8px;text-decoration:none}
.scroll-cue i{width:22px;height:36px;border:1.5px solid rgba(255,255,255,.6);border-radius:12px;position:relative}
.scroll-cue i::after{content:"";position:absolute;left:50%;top:7px;width:3px;height:7px;border-radius:2px;background:#fff;transform:translateX(-50%);animation:cue 1.8s infinite}
@keyframes cue{0%{opacity:1;top:7px}100%{opacity:0;top:20px}}
@media (max-width:980px){.home-hero .grid-hero{grid-template-columns:1fr;gap:40px;padding:60px 0 100px}.collage{height:380px}.scroll-cue{display:none}}
@media (max-width:520px){.collage{height:300px}.collage .badge{display:none}}

/* stats strip */
.stats-strip{background:var(--white);border-bottom:1px solid var(--line)}
.stats-strip .container{display:grid;grid-template-columns:repeat(4,1fr)}
.stats-strip .s{padding:30px 20px;text-align:center;border-right:1px solid var(--line)}
.stats-strip .s:last-child{border-right:0}
.stats-strip .n{font-family:var(--font-head);font-size:2.3rem;font-weight:700;color:var(--tea-800);line-height:1}
.stats-strip .l{font-size:.85rem;color:var(--muted);margin-top:8px}
@media (max-width:700px){.stats-strip .container{grid-template-columns:repeat(2,1fr)}.stats-strip .s:nth-child(2){border-right:0}.stats-strip .s:nth-child(-n+2){border-bottom:1px solid var(--line)}}

/* ---------- Sections ---------- */
section.block{padding:96px 0}
section.alt{background:var(--paper-2)}
section.cream{background:var(--gold-100)}
section.dark{background:var(--tea-950);color:rgba(255,255,255,.85)}
section.dark h2,section.dark h3{color:#fff}
.section-title{text-align:center;margin-bottom:54px}
.section-title .eyebrow{display:block;color:var(--gold-700);font-weight:600;letter-spacing:.24em;text-transform:uppercase;font-size:.76rem;margin-bottom:12px}
.section-title h2{margin-bottom:.4em}
.section-title p{color:var(--muted);max-width:660px;margin:0 auto;font-size:1.05rem}
section.dark .section-title p{color:rgba(255,255,255,.7)}
section.dark .section-title .eyebrow{color:var(--gold-300)}

.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(min(100%,230px),1fr))}

.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--line-2)}
.card .body{padding:24px 24px 26px}
.card .thumb{aspect-ratio:16/10;object-fit:cover;width:100%;transition:transform .8s var(--ease)}
.card:hover .thumb{transform:scale(1.05)}
.card .thumb-wrap{overflow:hidden}
.card h3{margin-bottom:.4em;font-size:1.28rem}
.card p{color:var(--muted);font-size:.95rem;margin:0}
a.card{text-decoration:none;color:inherit;display:block}
.tag{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--tea-700);background:var(--tea-50);border:1px solid var(--tea-100);padding:5px 11px;border-radius:999px;margin-bottom:12px}
.tag.gold{background:var(--gold-100);color:var(--gold-700);border-color:var(--gold-300)}
.tag.red{background:var(--brocade-100);color:var(--brocade);border-color:#ecc9c1}
.module-card .num{font-family:var(--font-head);font-size:2.6rem;color:var(--gold-500);font-weight:700;line-height:1;margin-bottom:6px}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-weight:600;color:var(--tea-700);font-size:.92rem}
.card:hover .more{gap:10px}

/* journey (home) */
.journey{display:grid;gap:90px}
.j-item{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.j-item:nth-child(even) .j-media{order:2}
.j-media{position:relative}
.j-media img{width:100%;aspect-ratio:5/4;object-fit:cover;border-radius:20px;box-shadow:var(--shadow-lg)}
.j-media::before{content:"";position:absolute;inset:22px -22px -22px 22px;border-radius:22px;background:var(--brocade-svg) repeat center/48px 16px;opacity:.18;z-index:-1}
.j-item:nth-child(even) .j-media::before{inset:22px 22px -22px -22px}
.j-media .j-no{position:absolute;top:-28px;left:-18px;font-family:var(--font-head);font-size:6rem;line-height:1;font-weight:700;color:var(--paper);-webkit-text-stroke:2px var(--gold-500);z-index:2}
.j-text h3{font-size:clamp(1.6rem,2.6vw,2.2rem)}
.j-text p{color:var(--ink-2)}
.j-text ul{list-style:none;padding:0;margin:0 0 22px;display:grid;gap:8px}
.j-text li{padding-left:26px;position:relative;color:var(--ink-2)}
.j-text li::before{content:"";position:absolute;left:4px;top:.62em;width:9px;height:9px;transform:rotate(45deg);border:1.5px solid var(--brocade)}
@media (max-width:900px){.j-item{grid-template-columns:1fr;gap:40px}.j-item:nth-child(even) .j-media{order:0}.journey{gap:70px}}

/* quote */
.quote-block{text-align:center;max-width:860px;margin:0 auto}
.quote-block blockquote{margin:0;font-family:var(--font-head);font-size:clamp(1.4rem,2.8vw,2.1rem);line-height:1.45;font-style:italic;color:#fff}
.quote-block blockquote::before{content:"“";display:block;font-size:5rem;line-height:.6;color:var(--gold-500);margin-bottom:10px}
.quote-block cite{display:block;margin-top:20px;font-style:normal;color:var(--gold-300);letter-spacing:.14em;text-transform:uppercase;font-size:.78rem}

/* gallery */
.gallery{columns:4 240px;column-gap:16px}
.gallery figure{break-inside:avoid;margin:0 0 16px;position:relative;border-radius:14px;overflow:hidden;cursor:zoom-in}
.gallery img{width:100%;transition:transform .8s var(--ease)}
.gallery figure:hover img{transform:scale(1.06)}
.gallery figcaption{position:absolute;inset:auto 0 0 0;padding:30px 14px 12px;font-size:.8rem;color:#fff;background:linear-gradient(transparent,rgba(11,33,23,.85));opacity:0;transform:translateY(8px);transition:.35s var(--ease)}
.gallery figure:hover figcaption{opacity:1;transform:none}

/* tea feature */
.tea-feature{position:relative;overflow:hidden;background:var(--tea-900);color:rgba(255,255,255,.86);isolation:isolate}
.tea-feature .bg{position:absolute;inset:0;background-size:cover;background-position:center;background-attachment:fixed;opacity:.28;z-index:-1}
.tea-feature h2{color:#fff}
.tea-points{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:24px 0 30px}
.tea-points div{padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12)}
.tea-points b{display:block;font-family:var(--font-head);font-size:1.5rem;color:var(--gold-300)}
.tea-points span{font-size:.85rem}
@media (hover:none){.tea-feature .bg{background-attachment:scroll}}

/* steps */
.steps{counter-reset:s;display:grid;gap:16px}
.steps li{list-style:none;counter-increment:s;position:relative;padding:20px 22px 20px 78px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm)}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:20px;top:16px;font-family:var(--font-head);font-size:1.7rem;font-weight:700;color:var(--gold-500)}
.steps{padding:0;margin:0 0 26px}

/* ---------- Article content ---------- */
.prose{font-size:1.04rem}
.prose > p,.prose li{color:var(--ink-2)}
.prose h2{margin-top:2em;padding-bottom:.45em;position:relative}
.prose h2::after{content:"";position:absolute;left:0;bottom:0;width:72px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--gold-500),var(--brocade))}
.prose h2:first-child,.prose .goals + h2{margin-top:1.4em}
.prose h3{margin-top:1.7em;color:var(--tea-800)}
.prose h4{font-family:var(--font-body);font-size:1.06rem;margin-top:1.5em;color:var(--tea-800);font-weight:700}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin-bottom:.45em}
.prose li::marker{color:var(--gold-600)}
.figure{margin:30px 0}
.figure img{border-radius:14px;width:100%;box-shadow:var(--shadow);cursor:zoom-in;transition:transform .5s var(--ease)}
.figure img:hover{transform:scale(1.01)}
.figure figcaption{font-size:.84rem;color:var(--muted);margin-top:12px;padding-left:14px;border-left:2px solid var(--gold-500);font-style:italic;line-height:1.5}
.fig-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:22px;margin:30px 0}
.fig-row .figure{margin:0}
.callout{border:1px solid var(--gold-300);background:linear-gradient(135deg,var(--gold-100),#fffaf0);padding:22px 26px;border-radius:var(--radius-sm);margin:28px 0;position:relative;overflow:hidden}
.callout::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(var(--gold-500),var(--brocade))}
.callout.green{border-color:var(--tea-100);background:linear-gradient(135deg,var(--tea-50),#fff)}
.callout.green::before{background:linear-gradient(var(--tea-500),var(--tea-800))}
.callout h4{margin-top:0;font-family:var(--font-head);font-size:1.15rem}
.question{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);padding:18px 22px 16px 70px;margin:26px 0;position:relative;color:var(--ink-2);box-shadow:var(--shadow-sm)}
.question::before{content:"?";position:absolute;left:20px;top:18px;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--brocade-100);color:var(--brocade);font-family:var(--font-head);font-weight:700;font-size:1.2rem}
.question::after{content:"Câu hỏi khám phá";position:absolute;top:-10px;left:70px;background:var(--paper);padding:0 8px;font-size:.68rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--brocade)}
.question p{margin:0 0 .35em}
.goals{background:var(--white);border-radius:var(--radius);padding:28px 30px;border:1px solid var(--line);box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.goals::after{content:"";position:absolute;left:0;right:0;top:0;height:5px;background:var(--brocade-svg) repeat-x center/36px 12px;opacity:.85}
.goals h3{margin-top:4px}
.goals ol{margin-bottom:0}

table.tbl{width:100%;border-collapse:separate;border-spacing:0;margin:22px 0;font-size:.95rem;background:var(--white);border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:13px 16px;vertical-align:top;text-align:left}
.tbl th{background:var(--tea-900);color:#fff;font-weight:600;font-size:.88rem;letter-spacing:.02em}
.tbl tr:last-child td{border-bottom:0}
.tbl tr:nth-child(even) td{background:var(--paper)}
.table-wrap{overflow-x:auto}

/* page layout with side toc */
.with-toc{display:grid;grid-template-columns:250px minmax(0,1fr);gap:56px;align-items:start}
.toc{position:sticky;top:96px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:20px 14px;box-shadow:var(--shadow-sm);max-height:calc(100vh - 120px);overflow:auto}
.toc b{display:block;margin:0 10px 10px;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-700)}
.toc a{display:block;padding:7px 10px 7px 14px;border-radius:8px;text-decoration:none;color:var(--ink-2);font-size:.88rem;line-height:1.4;border-left:2px solid transparent;transition:.2s}
.toc a:hover{background:var(--tea-50);color:var(--tea-900)}
.toc a.on{border-left-color:var(--gold-500);background:var(--tea-50);color:var(--tea-900);font-weight:600}
@media (max-width:980px){.with-toc{grid-template-columns:minmax(0,1fr)}.toc{position:static;max-height:none}}

/* ---------- Video ---------- */
.video-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:box-shadow .3s}
.video-card:hover{box-shadow:var(--shadow)}
.video-frame{position:relative;aspect-ratio:16/9;background:radial-gradient(circle at 30% 20%,var(--tea-700),var(--tea-950))}
.video-frame::before{content:"";position:absolute;inset:0;background:var(--brocade-svg) repeat center/48px 16px;opacity:.07}
.video-frame iframe,.video-frame video{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-placeholder{position:absolute;inset:0;display:grid;place-items:center;text-align:center;color:#fff;padding:20px}
.video-placeholder .play{width:72px;height:72px;border-radius:50%;background:rgba(255,255,255,.12);display:grid;place-items:center;font-size:24px;margin:0 auto 14px;border:1.5px solid var(--gold-500);box-shadow:0 0 0 10px rgba(201,162,75,.12);transition:transform .3s}
.video-card:hover .play{transform:scale(1.08)}
.video-placeholder b{font-family:var(--font-head);font-size:1.1rem;font-weight:600}
.video-placeholder small{opacity:.75;font-size:.8rem}
.video-card .meta{padding:16px 20px}
.video-card .meta h4{margin:0 0 4px;font-family:var(--font-body);font-size:1rem;font-weight:600;color:var(--tea-900)}
.video-card .meta p{margin:0;font-size:.84rem;color:var(--muted)}
.video-feature{max-width:940px;margin:0 auto}

/* ---------- Quiz ---------- */
.quiz{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.quiz-q{margin-bottom:24px;padding-bottom:20px;border-bottom:1px dashed var(--line)}
.quiz-q:last-of-type{border-bottom:0}
.quiz-q > p{font-weight:600;margin-bottom:12px;color:var(--tea-900)}
.quiz-opt{display:flex;gap:12px;align-items:flex-start;padding:11px 16px;border:1px solid var(--line);border-radius:12px;margin-bottom:8px;cursor:pointer;transition:background .15s,border-color .15s;background:var(--paper)}
.quiz-opt:hover{background:var(--tea-50);border-color:var(--tea-300)}
.quiz-opt input{margin-top:6px;accent-color:var(--tea-700)}
.quiz-opt.correct{background:#e5f4e8;border-color:#5aaa72}
.quiz-opt.wrong{background:#fbe9e6;border-color:#d9806f}
.quiz-result{font-weight:700;font-size:1.08rem;margin-top:12px;color:var(--tea-800)}
.quiz-explain{font-size:.9rem;color:var(--muted);margin-top:8px;display:none;padding:10px 14px;background:var(--gold-100);border-radius:10px}
.quiz.checked .quiz-explain{display:block}

/* sort game */
.sort-game .items{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:12px;margin:16px 0}
.sort-item{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:.95rem}
.sort-item .choices{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.sort-item button{border:1px solid var(--line-2);background:#fff;border-radius:999px;padding:6px 12px;cursor:pointer;font-family:inherit;font-size:.8rem;transition:.2s}
.sort-item button:hover{border-color:var(--tea-500)}
.sort-item button.sel{background:var(--tea-800);color:#fff;border-color:var(--tea-800)}
.sort-item.ok{border-color:#5aaa72;background:#e5f4e8}
.sort-item.bad{border-color:#d9806f;background:#fbe9e6}

/* Situation cards */
.situation{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm)}
.situation p{color:var(--tea-900)}
.situation .opts button{display:block;width:100%;text-align:left;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin:9px 0;cursor:pointer;font-family:inherit;font-size:.95rem;color:var(--ink-2);transition:.2s}
.situation .opts button:hover{background:var(--tea-50);border-color:var(--tea-300);transform:translateX(3px)}
.situation .feedback{margin-top:12px;padding:14px 16px;border-radius:12px;display:none;font-size:.95rem}
.situation .feedback.show{display:block;animation:pop .35s var(--ease)}
.situation .feedback.good{background:#e5f4e8;border:1px solid #bfe0c8}
.situation .feedback.bad{background:#fbe9e6;border:1px solid #f0c7bd}
@keyframes pop{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- Lyrics ---------- */
.lyrics{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:20px 0}
.lyrics .col{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px 28px;font-family:var(--font-head);font-style:italic;white-space:pre-line;font-size:1.06rem;line-height:1.85;color:var(--tea-900);box-shadow:var(--shadow-sm)}
.lyrics .col:last-child{background:linear-gradient(135deg,var(--gold-100),#fffaf0);border-color:var(--gold-300)}
.lyrics .col h4{font-style:normal;font-family:var(--font-body);color:var(--brocade);text-transform:uppercase;letter-spacing:.16em;font-size:.72rem;margin:0 0 8px}
@media (max-width:700px){.lyrics{grid-template-columns:1fr}}

/* ---------- Stats & rating ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,190px),1fr));gap:18px}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:linear-gradient(90deg,var(--gold-500),var(--brocade))}
.stat .n{font-family:var(--font-head);font-size:2.3rem;font-weight:700;color:var(--tea-800);line-height:1.1}
.stat .l{font-size:.85rem;color:var(--muted);margin-top:6px}
.stars{display:flex;gap:6px;font-size:2.2rem;cursor:pointer;user-select:none}
.stars span{color:#ddd8c8;transition:color .15s,transform .15s}
.stars span.on{color:var(--gold-500)}
.stars span:hover{transform:scale(1.15)}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-weight:600;margin-bottom:7px;font-size:.93rem;color:var(--tea-900)}
.input,textarea.input,select.input{width:100%;padding:12px 15px;border:1px solid var(--line-2);border-radius:12px;font-family:inherit;font-size:1rem;background:var(--paper);transition:border-color .2s,box-shadow .2s}
.input:focus{outline:0;border-color:var(--tea-500);box-shadow:0 0 0 4px rgba(71,148,102,.15);background:#fff}
textarea.input{min-height:110px;resize:vertical}
.review{border-bottom:1px solid var(--line);padding:14px 0}
.review:last-child{border-bottom:0}
.review .who{font-weight:600;color:var(--tea-900)}
.review .s{color:var(--gold-500);letter-spacing:2px}
.review .d{font-size:.8rem;color:var(--muted)}
.bar-row{display:flex;align-items:center;gap:10px;font-size:.88rem;margin:6px 0}
.bar-row .track{flex:1;height:8px;background:var(--paper-2);border-radius:999px;overflow:hidden}
.bar-row .fill{height:100%;background:linear-gradient(90deg,var(--gold-300),var(--gold-500))}
.notice{background:var(--white);border:1px solid var(--gold-300);border-left:5px solid var(--gold-500);border-radius:var(--radius-sm);padding:16px 20px;font-size:.93rem;color:var(--ink-2)}

/* ---------- Footer ---------- */
.site-footer{background:var(--tea-950);color:rgba(255,255,255,.72);padding:0 0 26px;position:relative}
.site-footer::before{content:"";display:block;height:16px;background:var(--brocade-svg) repeat-x center/48px 16px;margin-bottom:64px}
.site-footer h4{color:#fff;font-family:var(--font-body);font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;margin-bottom:16px;font-weight:700}
.site-footer a{color:rgba(255,255,255,.72);text-decoration:none;transition:color .2s}
.site-footer a:hover{color:var(--gold-300)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:9px;font-size:.93rem}
.footer-brand{font-family:var(--font-head);font-size:1.6rem;color:#fff;line-height:1.2;margin-bottom:12px}
.footer-brand em{color:var(--gold-300)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:46px;padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.84rem;opacity:.8}
.visit-pill{display:inline-flex;flex-wrap:wrap;gap:16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);padding:10px 18px;border-radius:999px;font-size:.88rem;margin-top:8px}
.visit-pill b{color:var(--gold-300)}
@media (max-width:820px){.footer-grid{grid-template-columns:1fr;gap:32px}}

/* ---------- Chatbot ---------- */
.chat-fab{position:fixed;right:22px;bottom:22px;z-index:90;height:60px;padding:0 22px 0 8px;border-radius:999px;border:0;cursor:pointer;background:linear-gradient(135deg,var(--tea-700),var(--tea-950));color:#fff;display:flex;align-items:center;gap:10px;font-family:inherit;font-weight:600;font-size:.92rem;box-shadow:0 16px 34px -12px rgba(11,33,23,.7);transition:transform .25s var(--ease)}
.chat-fab:hover{transform:translateY(-3px)}
.chat-fab .ic{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--gold-300),var(--gold-500));display:grid;place-items:center;font-size:22px}
.chat-fab .dot{position:absolute;top:6px;left:42px;width:12px;height:12px;border-radius:50%;background:var(--brocade);border:2px solid #fff}
@media (max-width:600px){.chat-fab{padding:0 8px}.chat-fab .lbl{display:none}}
.chat-box{position:fixed;right:22px;bottom:96px;z-index:91;width:min(400px,calc(100vw - 28px));height:min(580px,calc(100vh - 130px));background:#fff;border-radius:22px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line);opacity:0;transform:translateY(16px) scale(.98);pointer-events:none;transition:.3s var(--ease)}
.chat-box.open{opacity:1;transform:none;pointer-events:auto}
.chat-head{background:linear-gradient(135deg,var(--tea-800),var(--tea-950));color:#fff;padding:16px 18px;display:flex;align-items:center;gap:12px;position:relative}
.chat-head::after{content:"";position:absolute;left:0;right:0;bottom:0;height:6px;background:var(--brocade-svg) repeat-x center/30px 10px;opacity:.8}
.chat-head .av{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--gold-300),var(--gold-500));display:grid;place-items:center;font-size:20px}
.chat-head b{display:block;font-size:1rem;font-family:var(--font-head)}
.chat-head small{opacity:.8;font-size:.75rem;display:flex;align-items:center;gap:6px}
.chat-head small::before{content:"";width:7px;height:7px;border-radius:50%;background:#7ee29b}
.chat-head button{margin-left:auto;background:rgba(255,255,255,.1);border:0;color:#fff;font-size:1.3rem;cursor:pointer;width:34px;height:34px;border-radius:50%}
.chat-msgs{flex:1;overflow-y:auto;padding:18px;background:var(--paper);display:flex;flex-direction:column;gap:10px}
.msg{max-width:86%;padding:11px 15px;border-radius:18px;font-size:.93rem;line-height:1.6;white-space:pre-wrap;word-wrap:break-word;animation:pop .25s var(--ease)}
.msg.bot{background:#fff;border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:5px;color:var(--ink)}
.msg.user{background:var(--tea-800);color:#fff;align-self:flex-end;border-bottom-right-radius:5px}
.msg.typing{color:var(--muted);font-style:italic}
.chat-suggest{display:flex;gap:6px;flex-wrap:wrap;padding:0 18px 12px;background:var(--paper)}
.chat-suggest button{font-size:.78rem;border:1px solid var(--gold-300);background:#fff;color:var(--gold-700);border-radius:999px;padding:6px 11px;cursor:pointer;font-family:inherit;transition:.2s}
.chat-suggest button:hover{background:var(--gold-100)}
.chat-form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--line);background:#fff}
.chat-form input{flex:1;border:1px solid var(--line-2);border-radius:999px;padding:11px 16px;font-family:inherit;font-size:.95rem;background:var(--paper)}
.chat-form input:focus{outline:0;border-color:var(--tea-500)}
.chat-form button{border:0;background:var(--tea-800);color:#fff;border-radius:999px;padding:0 20px;cursor:pointer;font-weight:600;font-family:inherit}
.chat-form button:disabled{opacity:.5}
.chat-note{font-size:.7rem;color:var(--muted);text-align:center;padding:0 12px 10px;background:#fff}

/* lightbox */
.lightbox{position:fixed;inset:0;background:rgba(11,33,23,.92);z-index:130;display:grid;place-items:center;padding:30px;cursor:zoom-out;opacity:0;pointer-events:none;transition:opacity .3s}
.lightbox.open{opacity:1;pointer-events:auto}
.lightbox img{max-height:84vh;border-radius:12px;box-shadow:var(--shadow-lg)}
.lightbox p{color:rgba(255,255,255,.85);text-align:center;margin-top:14px;font-style:italic;max-width:760px}

/* 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:.1s}.reveal.d2{transition-delay:.2s}.reveal.d3{transition-delay:.3s}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.home-hero .bg{animation:none}html{scroll-behavior:auto}}

.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:56px}
.pager a{border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;text-decoration:none;background:#fff;color:var(--tea-900);font-family:var(--font-head);font-size:1.08rem;font-weight:600;transition:.3s var(--ease);box-shadow:var(--shadow-sm)}
.pager a:hover{border-color:var(--gold-500);box-shadow:var(--shadow);transform:translateY(-3px)}
.pager a small{display:block;color:var(--gold-700);font-family:var(--font-body);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;font-weight:600;margin-bottom:4px}
.pager a.next{text-align:right}
@media (max-width:640px){.pager{grid-template-columns:1fr}}
.center{text-align:center}
.mt0{margin-top:0}
.muted{color:var(--muted)}