:root{
  --ink:#0E1116;
  --blue:#2347D9;      /* electric blue */
  --blue-2:#1A36A8;
  --lime:#B7F34A;      /* signal lime */
  --soft:#EEF2FF;
  --soft-2:#F7F8FC;
  --muted:#4A5068;
  --line:#DCE1F2;
  --head:"Fahkwang",Tahoma,"Leelawadee UI",sans-serif;
  --body:"Athiti",Tahoma,"Leelawadee UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:#fff;color:var(--ink);font-family:var(--body);font-weight:500;font-size:1.14rem;line-height:1.8}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue)}
a:focus-visible,summary:focus-visible{outline:3px solid var(--lime);outline-offset:3px;border-radius:4px}
.wrap{width:min(1140px,100% - 2.5rem);margin-inline:auto}
.skip{position:absolute;left:-999px;top:0;background:var(--blue);color:#fff;padding:.5rem 1rem;z-index:10}
.skip:focus{left:1rem}

.hdr{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:2px solid var(--ink)}
.hdr-in{display:flex;align-items:center;gap:1.5rem;min-height:62px}
.brand{font-family:var(--head);font-weight:700;font-size:1.3rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:.55rem}
.arrow{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--blue);color:var(--lime);font-weight:700;font-size:1.2rem}
.hdr nav{display:flex;gap:1.3rem;margin-left:auto}
.hdr nav a{color:var(--muted);text-decoration:none;font-weight:600}
.hdr nav a:hover{color:var(--blue)}

.btn{display:inline-block;font-family:var(--head);font-weight:700;background:var(--blue);color:#fff;text-decoration:none;padding:.8rem 1.6rem;border-radius:12px;line-height:1.3;border:2px solid var(--ink);box-shadow:4px 4px 0 var(--lime),4px 4px 0 2px var(--ink);transition:transform .12s,box-shadow .12s}
.btn:hover{transform:translate(-1px,-1px)}
.btn:active{transform:translate(3px,3px);box-shadow:1px 1px 0 var(--lime),1px 1px 0 2px var(--ink)}
.btn-o{background:#fff;color:var(--ink)}
.btn-s{padding:.35rem 1rem;font-size:.95rem;box-shadow:3px 3px 0 var(--lime),3px 3px 0 2px var(--ink)}
.btn-wide{display:block;text-align:center}
.mid{text-align:center;margin:1.9rem 0}

.intro{padding:3rem 0 4.5rem;background:var(--soft);border-bottom:2px solid var(--ink);
  background-image:linear-gradient(rgba(35,71,217,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(35,71,217,.06) 1px,transparent 1px);background-size:32px 32px}
.intro-in{display:grid;grid-template-columns:1fr 1.05fr;gap:3rem;align-items:center}
.label{display:inline-block;margin:0 0 1rem;font-family:var(--head);font-size:.88rem;background:var(--lime);color:var(--ink);padding:.2rem .85rem;border-radius:999px;border:2px solid var(--ink)}
.intro h1{font-family:var(--head);font-weight:700;font-size:clamp(1.9rem,3.5vw,2.7rem);line-height:1.42;margin:0 0 1rem}
.lead{margin:0 0 1.6rem;color:var(--muted)}
.acts{display:flex;flex-wrap:wrap;gap:1rem}
.tiny{font-size:.92rem;color:var(--muted);margin-top:1.2rem}
.intro-art{margin:0;position:relative}
.intro-art img{border-radius:22px;border:2px solid var(--ink);box-shadow:10px 10px 0 var(--blue)}
.flowcard{position:absolute;left:-1.25rem;bottom:-2rem;width:230px;background:#fff;border:2px solid var(--ink);border-radius:16px;padding:.8rem 1rem;box-shadow:5px 5px 0 var(--lime),5px 5px 0 2px var(--ink);animation:slide .7s cubic-bezier(.2,.8,.3,1.2) .2s both}
@keyframes slide{from{opacity:0;transform:translateX(-24px)}to{opacity:1;transform:none}}
.flowcard p{margin:0}
.fc-row{display:flex;align-items:center;gap:.5rem;font-size:.92rem;padding:.2rem 0}
.fc-row b{margin-left:auto;font-family:var(--head)}
.fc-dot{width:10px;height:10px;border-radius:50%;background:var(--blue)}
.fc-row+.fc-row .fc-dot{background:#21B36B}
.fc-tag{margin-top:.4rem!important;font-size:.82rem;font-weight:700;color:var(--blue)}

.body{max-width:46rem;margin-inline:auto;padding:3.5rem 0 4rem}
.body h2{font-family:var(--head);font-weight:700;font-size:clamp(1.4rem,2.4vw,1.85rem);line-height:1.55;margin:3.25rem 0 1rem}
.body h2::after{content:"";display:block;width:56px;height:6px;margin-top:.6rem;background:var(--lime);border:2px solid var(--ink);border-radius:4px}
.body h3{font-family:var(--head);font-weight:700;font-size:1.12rem;color:var(--blue);margin:0 0 .35rem}
.body p{margin:0 0 1.1rem}

.pick{background:#fff;border:2px solid var(--ink);border-radius:22px;padding:1.5rem;box-shadow:8px 8px 0 var(--blue)}
.pick-t{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:1rem}
.pick-t p{margin:0!important;font-family:var(--head);font-weight:700;font-size:1.1rem}
.pick-logo{display:inline-flex;padding:.55rem .9rem;border-radius:12px;background:var(--ink)}
.pick-logo img{width:129px;height:30px}
.pick-g{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem;margin-bottom:1.2rem}
.pick-g p{margin:0!important;background:var(--soft);border-radius:14px;padding:.65rem .7rem;display:flex;flex-direction:column;line-height:1.45}
.pick-g b{font-family:var(--head);color:var(--blue)}
.pick-g span{font-size:.9rem;color:var(--muted)}

.why{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem;margin:1.25rem 0}
.why div{border:2px solid var(--ink);border-radius:18px;padding:1rem 1.1rem;background:var(--soft-2)}
.why p{margin:0;font-size:1.02rem;color:var(--muted)}

.tbl{overflow-x:auto;margin:1.25rem 0 1.5rem;border:2px solid var(--ink);border-radius:16px}
table{border-collapse:collapse;width:100%;min-width:540px;font-size:1.02rem}
caption{text-align:left;padding:.75rem 1rem;font-family:var(--head);font-weight:700;background:var(--soft);border-bottom:2px solid var(--ink)}
th,td{padding:.65rem .9rem;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
th{background:var(--ink);color:#fff;font-weight:600}
td:first-child{font-weight:700}
td.yes{font-weight:700;color:var(--blue-2);background:rgba(183,243,74,.18)}
td.yes::before{content:"✓ ";color:#1B8A4C}

.steps{list-style:none;counter-reset:s;padding:0;margin:1.5rem 0;display:grid;gap:.6rem}
.steps li{counter-increment:s;position:relative;padding:.85rem 1rem .85rem 4rem;border:2px solid var(--ink);border-radius:16px;background:#fff}
.steps li::before{content:counter(s);position:absolute;left:1rem;top:.8rem;width:2.2rem;height:2.2rem;border-radius:10px;background:var(--lime);border:2px solid var(--ink);font-family:var(--head);font-weight:700;display:grid;place-items:center}
.steps b{display:block;font-family:var(--head)}
.steps span{color:var(--muted)}

.pic{margin:2.25rem 0;border:2px solid var(--ink);border-radius:22px;overflow:hidden;background:var(--soft)}
.pic figcaption{padding:.7rem 1rem;font-size:.98rem;color:var(--muted);border-top:2px solid var(--ink);background:#fff}

.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:.7rem;margin:1.25rem 0}
.tiles p{margin:0!important;background:var(--soft);border-radius:16px;padding:.9rem 1rem;font-size:1rem;color:var(--muted);line-height:1.55}
.tiles b{display:block;font-family:var(--head);color:var(--ink);margin-bottom:.15rem}

.faq details{border:2px solid var(--ink);border-radius:14px;margin-bottom:.55rem;background:#fff}
.faq details[open]{background:var(--soft-2)}
.faq summary{cursor:pointer;list-style:none;padding:.9rem 2.8rem .9rem 1.1rem;font-family:var(--head);font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:1rem;top:.55rem;width:1.7rem;height:1.7rem;border-radius:8px;background:var(--lime);border:2px solid var(--ink);display:grid;place-items:center;font-size:1.1rem;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 1.1rem 1rem;margin:0;color:var(--muted)}

.byline{display:flex;gap:1.25rem;align-items:center;margin-top:3rem;padding:1.4rem;border:2px solid var(--ink);border-radius:22px;background:var(--soft);box-shadow:6px 6px 0 var(--lime),6px 6px 0 2px var(--ink)}
.byline-img{flex:none;width:96px;height:96px;border-radius:24px;object-fit:cover;border:2px solid var(--ink)}
.byline-name{font-family:var(--head);font-weight:700;margin:0 0 .2rem!important;font-size:1.15rem;color:var(--blue)}
.byline p{margin:0;font-size:1.02rem}

.foot{background:var(--ink);color:#B9BFD3;padding:2.5rem 0 5.5rem;font-size:1rem}
.foot a{color:var(--lime)}
.foot .age b{display:inline-grid;place-items:center;width:2.6rem;height:2.6rem;border-radius:10px;background:var(--lime);color:var(--ink);margin-right:.5rem;font-family:var(--head)}
.foot .copy{opacity:.7}
.dock{display:none}

@media (max-width:560px){.byline{flex-direction:column;align-items:flex-start}.byline-img{width:80px;height:80px}.why{grid-template-columns:1fr}}
@media (max-width:900px){
  .hdr nav{display:none}
  .hdr .btn-s{margin-left:auto}
  .intro{padding:2rem 0 3.5rem}
  .intro-in{grid-template-columns:1fr;gap:2.5rem}
  .flowcard{left:.5rem;width:210px}
  .pick-g{grid-template-columns:repeat(2,1fr)}
  .tiles{grid-template-columns:1fr 1fr}
  body{font-size:1.08rem}
  .dock{display:block;position:fixed;left:.75rem;right:.75rem;bottom:.75rem;z-index:6;text-align:center;font-family:var(--head);font-weight:700;background:var(--blue);color:#fff;border:2px solid var(--ink);text-decoration:none;padding:.85rem;border-radius:14px;box-shadow:0 10px 26px rgba(0,0,0,.3);padding-bottom:calc(.85rem + env(safe-area-inset-bottom,0px))}
}
@media (max-width:480px){.tiles{grid-template-columns:1fr}}

/* table of contents */
.toc{margin:2rem 0 0;background:#EEF2FF;border:1px solid #0E1116;border-radius:14px}
.toc summary{cursor:pointer;list-style:none;padding:.85rem 1.1rem;font-weight:700;color:#2347D9;display:flex;justify-content:space-between;align-items:center}
.toc summary::-webkit-details-marker{display:none}
.toc summary::after{content:"▾";transition:transform .2s}
.toc[open] summary::after{transform:rotate(180deg)}
.toc ol{margin:0;padding:0 1.1rem 1rem 2.4rem;columns:2;column-gap:2rem;font-size:.97rem}
.toc li{break-inside:avoid;margin:.2rem 0;color:#4A5068}
.toc a{color:#0E1116;text-decoration:none}
.toc a:hover{color:#2347D9;text-decoration:underline}
h2[id]{scroll-margin-top:84px}
@media (max-width:640px){.toc ol{columns:1}}