/* ============================================================
   z16c.me — Design System
   อ้างอิงโครงสร้าง/บรรยากาศ: pg1133.app (dark + gradient + cards)
   โทนแบรนด์: น้ำเงินหลวง + ทอง
   ============================================================ */

:root{
  --bg-darkest:#040a24;
  --bg-dark:#071039;
  --bg-card:#0d1a4d;
  --bg-card2:#0a143d;
  --line:rgba(255,255,255,.09);
  --text-main:#eef3ff;
  --text-muted:#9aa8cd;
  --primary:#1e5cff;
  --primary-dark:#1240c4;
  --gold:#ffd23f;
  --gold-dark:#e0ab16;
  --neon-pink:#ec4899;
  --neon-purple:#7c3aed;
  --green:#22c55e;
  --gradient-btn:linear-gradient(135deg,#7c3aed 0%,#ec4899 100%);
  --gradient-btn-hover:linear-gradient(135deg,#6d28d9 0%,#db2777 100%);
  --gradient-blue:linear-gradient(135deg,#1e5cff 0%,#22a6ff 100%);
  --gradient-gold:linear-gradient(135deg,#ffd23f 0%,#ff9d00 100%);
  --glow-purple:0 0 18px rgba(124,58,237,.5);
  --glow-gold:0 0 20px rgba(255,210,63,.35);
  --radius:16px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-card:0 10px 30px rgba(0,0,0,.35);
  --maxw:1200px;
}

*,*::before,*::after{box-sizing:border-box}
html{font-size:16px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-darkest);
  color:var(--text-main);
  font-family:"Noto Sans Thai",Tahoma,"Leelawadee UI",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:1rem;
  line-height:1.75;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 500px at 15% -5%,rgba(30,92,255,.20),transparent 60%),
    radial-gradient(800px 500px at 95% 8%,rgba(236,72,153,.14),transparent 60%),
    radial-gradient(700px 600px at 50% 110%,rgba(124,58,237,.12),transparent 60%);
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0}
li{list-style:none}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.35;font-weight:800;letter-spacing:-.2px}
p{margin:0 0 1em}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 18px}
.muted{color:var(--text-muted)}
.center{text-align:center}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

/* ---------- Top bar ---------- */
.topbar{
  background:linear-gradient(90deg,#0a1747,#123a9e 55%,#0a1747);
  font-size:.82rem;color:#cfe0ff;border-bottom:1px solid var(--line);
}
.topbar .container{display:flex;gap:18px;align-items:center;justify-content:center;flex-wrap:wrap;padding:7px 18px;text-align:center}
.topbar span{white-space:nowrap}
.topbar i{color:var(--gold)}

/* ---------- Header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(4,10,36,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:14px;padding:10px 0}
.logo{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.logo img{height:38px;width:auto}
.logo-text{font-weight:800;font-size:1.28rem;letter-spacing:-.5px;line-height:1}
.logo-text b{color:var(--gold)}
.logo-sub{display:block;font-size:.62rem;font-weight:600;color:var(--text-muted);letter-spacing:2.4px;text-transform:uppercase;margin-top:3px}

.main-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;flex-wrap:wrap}
.main-nav a{
  padding:8px 12px;border-radius:var(--radius-pill);font-size:.9rem;font-weight:600;
  color:#c9d6f5;transition:.18s;white-space:nowrap;
}
.main-nav a:hover{background:rgba(255,255,255,.07);color:#fff}
.main-nav a.active{background:linear-gradient(135deg,rgba(124,58,237,.9),rgba(236,72,153,.9));color:#fff;box-shadow:var(--glow-purple)}
.head-actions{display:flex;gap:9px;align-items:center;flex:0 0 auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-pill);
  font-weight:700;font-size:.95rem;cursor:pointer;border:0;
  transition:.2s;text-align:center;line-height:1.3;
}
.btn-primary{background:var(--gradient-btn);color:#fff;box-shadow:var(--glow-purple)}
.btn-primary:hover{background:var(--gradient-btn-hover);transform:translateY(-2px)}
.btn-gold{background:var(--gradient-gold);color:#3a2600;box-shadow:var(--glow-gold)}
.btn-gold:hover{filter:brightness(1.06);transform:translateY(-2px)}
.btn-blue{background:var(--gradient-blue);color:#fff}
.btn-blue:hover{filter:brightness(1.08);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#dbe6ff;border:1px solid rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.5)}
.btn-sm{padding:8px 15px;font-size:.85rem}
.btn-lg{padding:15px 30px;font-size:1.02rem}
.btn-block{display:flex;width:100%}

/* ---------- Hero ---------- */
.hero{padding:56px 0 44px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:8px;padding:7px 15px;border-radius:var(--radius-pill);
  background:rgba(124,58,237,.16);border:1px solid rgba(168,85,247,.45);
  color:#d9c7ff;font-size:.8rem;font-weight:600;margin-bottom:18px;
}
.hero h1{font-size:clamp(1.75rem,3.6vw,2.9rem)}
.hero h1 .hl{background:linear-gradient(135deg,#7c3aed,#ec4899);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero h1 .hl-gold{background:var(--gradient-gold);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{font-size:1.03rem;color:var(--text-muted);max-width:56ch}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero-media{position:relative;display:flex;justify-content:center}
.phone{
  width:min(330px,86%);border-radius:34px;padding:12px;background:linear-gradient(160deg,#1a2a63,#0a1330);
  border:1px solid rgba(255,255,255,.13);box-shadow:0 24px 60px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.04) inset;
  position:relative;
}
.phone::after{content:"";position:absolute;top:12px;left:50%;transform:translateX(-50%);width:78px;height:6px;border-radius:9px;background:rgba(0,0,0,.55)}
.phone-screen{border-radius:24px;overflow:hidden;background:#040a24}
.phone-screen img{border-radius:24px}
.float-chip{
  position:absolute;background:rgba(7,16,57,.92);border:1px solid var(--line);border-radius:14px;
  padding:9px 14px;font-size:.8rem;font-weight:700;box-shadow:var(--shadow-card);backdrop-filter:blur(6px)
}
.float-chip b{display:block;color:var(--gold);font-size:1.05rem}
.chip-1{top:12%;right:2%;animation:float 5s ease-in-out infinite}
.chip-2{bottom:12%;left:0;animation:float 6s ease-in-out infinite .8s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* ---------- Stats band ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px}
.stat{
  background:linear-gradient(160deg,var(--bg-card),var(--bg-card2));
  border:1px solid var(--line);border-radius:var(--radius);padding:20px 16px;text-align:center;
}
.stat b{display:block;font-size:1.6rem;color:var(--gold);line-height:1.2}
.stat span{font-size:.82rem;color:var(--text-muted)}

/* ---------- Sections ---------- */
.section{padding:56px 0}
.section.alt{background:linear-gradient(180deg,rgba(7,16,57,.65),rgba(4,10,36,.2))}
.section-head{max-width:760px;margin:0 auto 36px;text-align:center}
.section-head h2{font-size:clamp(1.4rem,2.6vw,2.05rem)}
.section-head .eyebrow{color:var(--gold);font-weight:700;font-size:.85rem;letter-spacing:2px;text-transform:uppercase;display:block;margin-bottom:8px}
.section-head p{color:var(--text-muted);margin:0}

/* ---------- Cards ---------- */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:linear-gradient(160deg,var(--bg-card),var(--bg-card2));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.22s;
}
.card:hover{border-color:rgba(255,210,63,.45);transform:translateY(-4px);box-shadow:var(--shadow-card)}
.card h3{font-size:1.06rem;margin-bottom:.45em}
.card p{margin:0;color:var(--text-muted);font-size:.93rem}
.card .ico{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:rgba(30,92,255,.18);border:1px solid rgba(30,92,255,.4);color:var(--gold);
  font-size:1.3rem;margin-bottom:14px;
}
.card.gold .ico{background:rgba(255,210,63,.14);border-color:rgba(255,210,63,.4)}
.card .tag{
  display:inline-block;font-size:.72rem;font-weight:700;padding:4px 11px;border-radius:var(--radius-pill);
  background:rgba(236,72,153,.16);border:1px solid rgba(236,72,153,.4);color:#ffc3e3;margin-bottom:12px;
}
.card .tag.gold{background:rgba(255,210,63,.14);border-color:rgba(255,210,63,.45);color:#ffe08a}

/* ---------- Steps ---------- */
.steps{counter-reset:s;display:grid;gap:16px;grid-template-columns:repeat(4,1fr)}
.step{
  position:relative;background:linear-gradient(160deg,var(--bg-card),var(--bg-card2));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px 22px;
}
.step::before{
  counter-increment:s;content:counter(s);
  position:absolute;top:-16px;left:22px;width:34px;height:34px;border-radius:11px;
  background:var(--gradient-gold);color:#3a2600;font-weight:800;display:flex;align-items:center;justify-content:center;
  font-size:1rem;box-shadow:var(--glow-gold);
}
.step h3{font-size:1rem;margin:8px 0 .4em}
.step p{margin:0;color:var(--text-muted);font-size:.9rem}

/* ---------- Prose ---------- */
.prose{max-width:900px;margin:0 auto}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.3em;font-size:1.12rem;color:#fff}
.prose p,.prose li{color:#c3cfe8}
.prose ul{display:grid;gap:8px;margin:0 0 1.2em;padding-left:2px}
.prose ul li{position:relative;padding-left:26px}
.prose ul li::before{content:"\F26E";font-family:"bootstrap-icons";position:absolute;left:0;top:1px;color:var(--gold)}
.prose a{color:#8fb6ff;text-decoration:underline}

/* ---------- Table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:rgba(10,20,61,.6)}
table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
th{background:rgba(30,92,255,.14);color:#dce7ff;font-weight:700;white-space:nowrap}
td{color:#c3cfe8}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:rgba(255,255,255,.03)}
td.pos{color:var(--green);font-weight:700}

/* ---------- Promo banners ---------- */
.promo-grid{display:grid;gap:20px;grid-template-columns:repeat(2,1fr)}
.promo{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-card);
  transition:.22s;display:flex;flex-direction:column
}
.promo:hover{transform:translateY(-4px);border-color:rgba(255,210,63,.45);box-shadow:var(--shadow-card)}
.promo img{width:100%;aspect-ratio:99/32;object-fit:cover}
.promo-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.promo-body h3{font-size:1rem;margin:0}
.promo-body p{margin:0;color:var(--text-muted);font-size:.9rem}
.promo-body .btn{align-self:flex-start;margin-top:auto}
.promo.wide{grid-column:1 / -1}

/* ---------- Testimonials / reviews ---------- */
.review-grid{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
.review{
  background:linear-gradient(160deg,var(--bg-card),var(--bg-card2));border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:12px
}
.review-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  font-weight:800;color:#04122e;background:var(--gradient-gold)
}
.review-top b{display:block;font-size:.95rem}
.review-top span{font-size:.78rem;color:var(--text-muted)}
.stars{color:var(--gold);font-size:.9rem;letter-spacing:1px}
.review p{margin:0;color:#c3cfe8;font-size:.92rem}
.review .meta{font-size:.74rem;color:var(--text-muted);border-top:1px solid var(--line);padding-top:10px;margin-top:auto}
.rating-summary{
  display:flex;align-items:center;gap:26px;justify-content:center;flex-wrap:wrap;
  background:linear-gradient(160deg,var(--bg-card),var(--bg-card2));border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;margin-bottom:34px
}
.rating-summary .big{font-size:3rem;font-weight:800;color:var(--gold);line-height:1}
.rating-summary .sub{font-size:.85rem;color:var(--text-muted)}
.bars{display:grid;gap:6px;min-width:230px}
.bar-row{display:flex;align-items:center;gap:10px;font-size:.8rem;color:var(--text-muted)}
.bar{flex:1;height:8px;border-radius:9px;background:rgba(255,255,255,.09);overflow:hidden}
.bar i{display:block;height:100%;background:var(--gradient-gold)}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;display:grid;gap:12px}
.faq details{
  background:linear-gradient(160deg,var(--bg-card),var(--bg-card2));border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:0;overflow:hidden
}
.faq details[open]{border-color:rgba(255,210,63,.4)}
.faq summary{
  cursor:pointer;padding:16px 20px;font-weight:700;font-size:.97rem;list-style:none;
  display:flex;justify-content:space-between;gap:14px;align-items:flex-start
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"\F4FE";font-family:"bootstrap-icons";color:var(--gold);transition:.2s;flex:0 0 auto}
.faq details[open] summary::after{transform:rotate(180deg)}
.faq .a{padding:0 20px 18px;color:var(--text-muted);font-size:.93rem}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(135deg,rgba(124,58,237,.28),rgba(236,72,153,.22)),var(--bg-card);
  border:1px solid rgba(168,85,247,.35);border-radius:22px;padding:44px 32px;text-align:center;
  box-shadow:var(--shadow-card)
}
.cta-band h2{font-size:clamp(1.3rem,2.4vw,1.9rem)}
.cta-band p{color:#cfd9f0;max-width:70ch;margin:0 auto 22px}
.cta-band .row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.trust-row{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;margin-top:22px;font-size:.82rem;color:var(--text-muted)}
.trust-row span{display:inline-flex;align-items:center;gap:7px}
.trust-row i{color:var(--gold)}

/* ---------- Notice ---------- */
.notice{
  border-left:3px solid var(--gold);background:rgba(255,210,63,.07);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:16px 20px;font-size:.9rem;color:#dfe7fb;margin:22px 0
}
.notice b{color:var(--gold)}

/* ---------- Breadcrumb ---------- */
.crumb{font-size:.82rem;color:var(--text-muted);padding:14px 0 0}
.crumb a:hover{color:var(--gold)}
.crumb span{opacity:.5;margin:0 7px}

/* ---------- Page head ---------- */
.page-head{padding:38px 0 8px;text-align:center}
.page-head h1{font-size:clamp(1.55rem,3vw,2.4rem)}
.page-head p{color:var(--text-muted);max-width:74ch;margin:0 auto}

/* ---------- Footer ---------- */
.site-footer{background:linear-gradient(180deg,rgba(7,16,57,.5),#02061a);border-top:1px solid var(--line);padding:48px 0 22px;margin-top:56px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.foot-col h4{font-size:.9rem;letter-spacing:1.4px;text-transform:uppercase;color:var(--gold);margin-bottom:14px}
.foot-col ul{display:grid;gap:9px}
.foot-col a{color:#b8c5e6;font-size:.9rem}
.foot-col a:hover{color:var(--gold)}
.foot-col p{color:var(--text-muted);font-size:.88rem}
.foot-bottom{
  border-top:1px solid var(--line);margin-top:34px;padding-top:20px;display:flex;gap:18px;
  justify-content:space-between;flex-wrap:wrap;font-size:.8rem;color:var(--text-muted)
}
.age-badge{display:inline-flex;align-items:center;gap:8px;color:#ffb3c8;font-weight:700}

/* ---------- Sticky mobile CTA ---------- */
.mobile-cta{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;gap:10px;padding:10px 12px;
  background:rgba(4,10,36,.96);border-top:1px solid var(--line);backdrop-filter:blur(10px)}
.mobile-cta .btn{flex:1;padding:12px 10px;font-size:.9rem}

/* ---------- Nav toggle ---------- */
.nav-toggle{display:none;background:transparent;border:1px solid var(--line);color:#fff;border-radius:10px;
  width:42px;height:40px;font-size:1.2rem;align-items:center;justify-content:center}

/* ---------- Responsive ---------- */
@media (max-width:1000px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-media{order:-1}
  .grid-4,.steps{grid-template-columns:repeat(2,1fr)}
  .grid-3,.review-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  html{font-size:15.5px}
  .nav-toggle{display:flex}
  .main-nav{
    display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    background:rgba(5,12,42,.99);border-bottom:1px solid var(--line);padding:10px 14px 16px;gap:3px
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:11px 14px;border-radius:10px}
  .header-inner{position:relative;justify-content:space-between}
  .head-actions .btn-ghost{display:none}
  .stats{grid-template-columns:repeat(2,1fr)}
  .grid-2,.grid-3,.grid-4,.steps,.review-grid,.promo-grid{grid-template-columns:1fr}
  .section{padding:40px 0}
  .footer{padding-bottom:74px}
  .mobile-cta{display:flex}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .cta-band{padding:32px 20px}
  .float-chip{font-size:.72rem;padding:7px 11px}
}