/* ============================================================
   ZUDO.vn — style.css dùng chung cho cả web (static thuần)
   Brand: teal #12564C + coral #FF6A4D + amber (từ salepage ZUDO)
   Font: Playfair Display (serif) + Be Vietnam Pro (sans)
   ============================================================ */
:root{
  --teal:#12564C; --teal-d:#0C3B34; --teal-l:#1a6f60; --coral:#FF6A4D; --coral-d:#E4553B;
  --amber:#F0A93B; --blush:#F6D2C6; --ivory:#FBF7F1; --panel:#F3EDE4;
  --ink:#22302C; --muted:#5C6B64; --line:#E7DFD4; --card:#fff;
}
*{box-sizing:border-box} html{scroll-behavior:smooth}
body{margin:0;background:var(--ivory);color:var(--ink);font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.75;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;image-orientation:from-image}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
.serif{font-family:'Playfair Display',Georgia,serif}
a{color:var(--teal)}
section{padding:66px 0;position:relative}
h1,h2,h3,h4{font-family:'Playfair Display',Georgia,serif}
h2{font-size:32px;line-height:1.25;margin:0 0 8px;font-weight:800;letter-spacing:-.01em;color:var(--teal-d)}
h2 .u{background:linear-gradient(120deg,var(--coral),var(--amber));-webkit-background-clip:text;background-clip:text;color:transparent}
h3{color:var(--teal-d)}
.lead{color:var(--muted);font-size:18px;margin:0 auto 34px;max-width:660px}
.center{text-align:center}
.kicker{display:inline-block;font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);background:var(--blush);padding:5px 14px;border-radius:999px;font-weight:700;margin-bottom:16px}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.btn{display:inline-block;text-decoration:none;font-weight:700;font-size:16px;padding:13px 26px;border-radius:12px;transition:.2s;cursor:pointer;border:none;font-family:inherit}
.btn.primary{background:linear-gradient(135deg,#FF6A4D,#E4553B);color:#fff;box-shadow:0 10px 24px #ff6a4d3d}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px #ff6a4d55}
.btn.ghost{background:transparent;border:1.5px solid var(--teal);color:var(--teal)}
.btn.ghost:hover{background:var(--teal);color:#fff}
.btn.wlite{background:#ffffff1f;border:1.5px solid #ffffff66;color:#fff}
.btn.wlite:hover{background:#ffffff33}

/* nav */
.nav{position:sticky;top:0;z-index:60;background:#0c3b34ee;backdrop-filter:blur(8px);border-bottom:1px solid #ffffff1a}
.nav .in{max-width:1080px;margin:0 auto;padding:12px 22px;display:flex;align-items:center;gap:22px}
.brand{font-family:'Playfair Display',Georgia,serif;font-weight:800;color:#fff;font-size:20px;letter-spacing:.02em;white-space:nowrap;text-decoration:none}
.brand small{display:block;font-family:'Be Vietnam Pro',sans-serif;font-size:10.5px;letter-spacing:.22em;color:var(--amber);font-weight:600}
.menu{display:flex;gap:20px;margin-left:8px;flex:1}
.menu a{color:#dcece7;text-decoration:none;font-size:15px;font-weight:500}
.menu a:hover,.menu a.on{color:#fff}
.nav .cta{background:var(--coral);color:#fff;text-decoration:none;font-weight:700;font-size:14px;padding:9px 16px;border-radius:9px;white-space:nowrap}
.nav .cta:hover{background:var(--coral-d)}
.burger{display:none;background:none;border:0;flex-direction:column;gap:5px;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:#fff;border-radius:2px}

/* hero (trang chủ) */
.hero{background:radial-gradient(1000px 500px at 82% -10%,#1a6f60,transparent 60%),linear-gradient(160deg,#0C3B34,#12564C);color:#fff;padding:60px 0 66px;overflow:hidden}
.herogrid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero h1{font-size:44px;line-height:1.12;margin:0 0 18px;font-weight:800;letter-spacing:-.02em}
.hero h1 em{color:var(--amber);font-style:normal}
.hero p{color:#e2f0ec;font-size:18px;margin:0 0 26px}
.hero .acts{display:flex;gap:14px;flex-wrap:wrap}
.portrait{aspect-ratio:4/5;border-radius:22px;overflow:hidden;box-shadow:0 24px 60px #0006;border:5px solid #ffffff14}
.portrait img{width:100%;height:100%;object-fit:cover;object-position:50% 22%;transition:transform .8s ease}
.portrait:hover img{transform:scale(1.05)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:44px}
.stat{background:#0a332b;border:1px solid #ffffff1f;border-radius:14px;padding:16px;text-align:center}
.stat b{display:block;font-family:'Playfair Display',serif;font-size:26px;color:var(--amber);font-weight:800;line-height:1}
.stat span{font-size:12px;color:#cfe6df;display:block;margin-top:5px}

/* page hero (trang con) */
.phero{background:radial-gradient(800px 400px at 85% -20%,#1a6f60,transparent 60%),linear-gradient(160deg,#0C3B34,#12564C);color:#fff;padding:52px 0 46px}
.phero h1{font-size:40px;line-height:1.14;margin:10px 0 12px;font-weight:800;color:#fff}
.phero p{color:#dcefe9;font-size:18px;max-width:640px;margin:0}
.crumb{font-size:13px;color:#9fc3b9;margin-bottom:6px}
.crumb a{color:#9fc3b9;text-decoration:none} .crumb a:hover{color:#fff}

/* about */
.about{display:grid;grid-template-columns:.85fr 1.15fr;gap:40px;align-items:center}
.about.rev{grid-template-columns:1.15fr .85fr}
.about .ph{border-radius:20px;overflow:hidden;box-shadow:0 14px 36px #0000001c;aspect-ratio:4/5}
.about .ph img{width:100%;height:100%;object-fit:cover;object-position:50% 22%}

/* pillars / cards */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px 22px;box-shadow:0 8px 26px #0000000c;transition:transform .3s ease,box-shadow .3s ease}
.pcard:hover{transform:translateY(-4px);box-shadow:0 16px 34px #00000016}
.pcard .ic{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--teal),var(--teal-l));color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;margin-bottom:14px;font-family:'Playfair Display',serif}
.pcard h3{margin:0 0 8px;font-size:19px;color:var(--teal-d)}
.pcard p{margin:0;font-size:15px;color:var(--muted)}

/* course highlight */
.course{display:grid;grid-template-columns:1fr 1fr;gap:0;border-radius:22px;overflow:hidden;box-shadow:0 18px 44px #12564c22;background:var(--card);border:1px solid var(--line)}
.course .l{background:radial-gradient(500px 300px at 20% 0%,#1a6f60,transparent),linear-gradient(160deg,#12564C,#0C3B34);color:#fff;padding:40px 34px}
.course .l h3{font-size:26px;margin:6px 0 10px;color:#fff}
.course .r{padding:40px 34px}
.course ul{padding-left:1.1em;margin:0 0 20px} .course li{margin:0 0 10px}
.price{font-size:34px;font-weight:900;color:var(--teal-d);font-family:'Playfair Display',serif} .price s{color:var(--muted);font-weight:500;font-size:20px}

/* timeline (trang Về Thịnh) */
.tl{max-width:760px;margin:0 auto;position:relative;padding-left:28px}
.tl::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--coral),var(--amber))}
.tl .it{position:relative;margin-bottom:30px}
.tl .it::before{content:"";position:absolute;left:-28px;top:5px;width:14px;height:14px;border-radius:50%;background:var(--coral);border:3px solid var(--ivory);box-shadow:0 0 0 2px var(--coral)}
.tl .yr{font-weight:800;color:var(--coral-d);font-size:14px;letter-spacing:.04em}
.tl h3{margin:2px 0 6px;font-size:20px}
.tl p{margin:0;color:#3b4a44;font-size:16px}

/* prose (bài viết / nội dung dài) */
.prose{max-width:720px;margin:0 auto;font-size:17.5px}
.prose p{margin:0 0 18px;color:#33433e}
.prose h2{font-size:27px;margin:34px 0 12px}
.prose h3{font-size:21px;margin:26px 0 10px}
.prose blockquote{border-left:4px solid var(--coral);background:var(--panel);margin:22px 0;padding:14px 20px;border-radius:0 12px 12px 0;font-style:italic;color:#3b4a44}

/* blog list */
.cats{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:30px}
.cats a{background:var(--card);border:1px solid var(--line);color:var(--teal-d);text-decoration:none;font-size:14px;font-weight:600;padding:7px 15px;border-radius:999px}
.cats a:hover,.cats a.on{background:var(--teal);color:#fff;border-color:var(--teal)}
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 6px 20px #0000000a;transition:transform .3s ease;display:block;text-decoration:none;color:inherit}
.post:hover{transform:translateY(-4px);box-shadow:0 14px 30px #00000014}
.post .thumb{height:140px;display:flex;align-items:flex-end;padding:14px;color:#fff;font-weight:700;font-size:14px}
.post .bd{padding:16px 18px}
.post h4{margin:8px 0 6px;font-size:16.5px;color:var(--teal-d);line-height:1.4;font-family:'Playfair Display',serif}
.post .meta{font-size:13px;color:var(--muted)}
.t1{background:linear-gradient(135deg,#12564C,#1a6f60)} .t2{background:linear-gradient(135deg,#E4553B,#FF6A4D)}
.t3{background:linear-gradient(135deg,#B9822A,#F0A93B)} .t4{background:linear-gradient(135deg,#2c5f77,#4a90ad)}
.t5{background:linear-gradient(135deg,#6a3f6f,#a06aa0)} .t6{background:linear-gradient(135deg,#166b58,#2fae86)}

/* lead magnet / form */
.lead-m{background:radial-gradient(600px 300px at 15% 0%,#1a6f60,transparent),linear-gradient(160deg,#15382f,#12564C);color:#fff;border-radius:24px;padding:44px 34px;text-align:center}
.lead-m h2{color:#fff} .lead-m p{color:#dcefe9;max-width:560px;margin:0 auto 22px}
.form{display:flex;gap:10px;max-width:480px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.form input{flex:1;min-width:220px;padding:14px 16px;border-radius:11px;border:none;font-size:16px;font-family:inherit}

/* testimonial */
.tgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.tcard{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 6px 20px #0000000a}
.tcard p{font-style:italic;color:#3b4a44;margin:0 0 12px}
.tcard .who{font-weight:700;color:var(--teal-d);font-size:14px}
.tcard .res{color:var(--coral-d);font-weight:700;font-size:14px;margin-top:4px}

/* contact */
.cbox{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px 26px;box-shadow:0 8px 26px #0000000c}
.cbox h3{margin:0 0 6px}
.field{display:block;margin-bottom:14px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--teal-d);margin-bottom:6px}
.field input,.field textarea{width:100%;padding:12px 14px;border-radius:11px;border:1.5px solid var(--line);font-size:16px;font-family:inherit;background:var(--ivory)}
.field textarea{min-height:120px;resize:vertical}

/* footer */
footer{background:#0C3B34;color:#bcd4cd;padding:50px 0 40px;font-size:14px}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px;margin-bottom:26px}
footer h4{color:#fff;font-size:15px;margin:0 0 12px;font-family:'Playfair Display',serif}
footer a{color:#bcd4cd;text-decoration:none;display:block;margin:0 0 8px}
footer a:hover{color:#fff}
.disc{border-top:1px solid #ffffff1a;padding-top:18px;font-size:12.5px;color:#8fa8a1;line-height:1.6}

@media(max-width:860px){
  .burger{display:flex}
  .menu{display:none;position:absolute;top:56px;left:0;right:0;background:#0c3b34f5;flex-direction:column;padding:16px 22px;gap:16px;border-bottom:1px solid #ffffff1a}
  .menu.open{display:flex}
  .herogrid,.about,.about.rev,.course,.feature{grid-template-columns:1fr}
  .grid3,.grid2,.pgrid,.tgrid,.stats{grid-template-columns:1fr 1fr}
  .hero h1{font-size:32px} .phero h1{font-size:30px} h2{font-size:26px}
  .portrait{max-width:320px;margin:0 auto}
}
@media(max-width:520px){.grid3,.pgrid,.tgrid,.stats,.grid2{grid-template-columns:1fr}}