/* Layout: ERPschool site v2 on Bootstrap 5; bright crystal glass, logo blues; gold/pink as soft accents, no black or grey */
:root{
  --bg:#F5F9FF; --ink:#1A2B5F; --ink-soft:#4E5F92; --line:rgba(120,150,220,.25);
  --glass:rgba(255,255,255,.66); --glass-strong:rgba(255,255,255,.88); --glass-line:rgba(255,255,255,.95);
  --shadow:0 10px 40px rgba(60,100,190,.12);
  --primary:#1E7FE0; --primary-hover:#1569BE; --on-primary:#FFFFFF;
  --navy:#16408F; --gold:#F2B33D; --gold-soft:#FFF2D2; --pink:#E76A9B; --pink-soft:#FDE7F0; --sky-soft:#E2EEFF; --mint-soft:#DDF6EC;
  --deep:#0F2A6B; --deep-ink:#EEF3FF; --deep-soft:#B6C6EE; --deep-line:rgba(170,195,255,.22);
  --line-green:#06C755;
  --aura-1:rgba(120,175,255,.45); --aura-2:rgba(255,205,110,.30); --aura-3:rgba(255,160,200,.26);
  --f-display:"Kanit","IBM Plex Sans Thai",system-ui,sans-serif;
  --f-body:"IBM Plex Sans Thai",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0D1533; --ink:#EAF0FF; --ink-soft:#AEBCE8; --line:rgba(140,170,255,.2);
  --glass:rgba(30,44,95,.55); --glass-strong:rgba(30,44,95,.82); --glass-line:rgba(150,180,255,.18);
  --shadow:0 10px 40px rgba(0,0,0,.3);
  --primary:#5FA2F5; --primary-hover:#7DB4F7; --on-primary:#0D1533;
  --navy:#9DB9FF; --gold:#F5C55A; --gold-soft:rgba(245,197,90,.16); --pink:#F28BB3; --pink-soft:rgba(242,139,179,.16); --sky-soft:rgba(95,162,245,.18); --mint-soft:rgba(6,199,85,.14);
  --deep:#08113A; --deep-ink:#EEF3FF; --deep-soft:#AEBCEB; --deep-line:rgba(150,180,255,.18);
  --aura-1:rgba(70,120,230,.35); --aura-2:rgba(230,170,60,.12); --aura-3:rgba(230,100,160,.15); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0D1533; --ink:#EAF0FF; --ink-soft:#AEBCE8; --line:rgba(140,170,255,.2);
  --glass:rgba(30,44,95,.55); --glass-strong:rgba(30,44,95,.82); --glass-line:rgba(150,180,255,.18);
  --shadow:0 10px 40px rgba(0,0,0,.3);
  --primary:#5FA2F5; --primary-hover:#7DB4F7; --on-primary:#0D1533;
  --navy:#9DB9FF; --gold:#F5C55A; --gold-soft:rgba(245,197,90,.16); --pink:#F28BB3; --pink-soft:rgba(242,139,179,.16); --sky-soft:rgba(95,162,245,.18); --mint-soft:rgba(6,199,85,.14);
  --deep:#08113A; --deep-ink:#EEF3FF; --deep-soft:#AEBCEB; --deep-line:rgba(150,180,255,.18);
  --aura-1:rgba(70,120,230,.35); --aura-2:rgba(230,170,60,.12); --aura-3:rgba(230,100,160,.15); color-scheme:dark}

body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:1rem;line-height:1.65;
  --bs-body-bg:var(--bg);--bs-body-color:var(--ink);--bs-border-color:var(--line)}
.aura{position:fixed;inset:0;z-index:-1;pointer-events:none;background:
  radial-gradient(40rem 30rem at 85% -5%,var(--aura-1),transparent 70%),
  radial-gradient(30rem 24rem at 0% 35%,var(--aura-2),transparent 70%),
  radial-gradient(34rem 26rem at 70% 90%,var(--aura-3),transparent 70%)}
.gutter{padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3,h4{font-family:var(--f-display);font-weight:600;text-wrap:balance;color:inherit}
h1{font-size:clamp(1.9rem,3.6vw,2.6rem);line-height:1.25}
h2{font-size:clamp(1.45rem,2.5vw,1.85rem);line-height:1.3}
h3{font-size:1.1rem;line-height:1.4}
.hl{color:var(--primary)}
.eyebrow{font-family:var(--f-mono);font-size:.76rem;letter-spacing:.08em;text-transform:uppercase;color:var(--primary);margin-bottom:.5rem}
.lead-s{font-size:1.05rem;color:var(--ink-soft);max-width:36rem}
.muted{color:var(--ink-soft)}
a{color:var(--navy)}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
.glass{background:var(--glass);border:1px solid var(--glass-line);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px) saturate(1.4);backdrop-filter:blur(18px) saturate(1.4)}
section.band{padding-block:4rem}
.sec-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:1rem;margin-bottom:2rem}

/* buttons */
.btn-main{background:var(--primary);color:var(--on-primary);border:0;font-weight:600;padding:.7rem 1.35rem;border-radius:999px;box-shadow:0 6px 18px rgba(30,127,224,.28)}
.btn-main:hover{background:var(--primary-hover);color:var(--on-primary)}
.btn-soft{border:1px solid var(--glass-line);background:var(--glass);font-weight:600;padding:.7rem 1.35rem;border-radius:999px;color:var(--ink);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
.btn-soft:hover{background:var(--glass-strong);color:var(--ink)}
.btn-line{background:var(--line-green);color:#fff;border:0;font-weight:600;padding:.7rem 1.35rem;border-radius:999px}
.btn-line:hover{background:#05B04B;color:#fff}

/* header */
.site-head{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;padding-top:.75rem}
.nav-shell{padding:.5rem .6rem .5rem .6rem;border-radius:999px}
@media (max-width:991.98px){.nav-shell{border-radius:1.4rem;padding:.6rem .75rem}}
.brand{font-family:var(--f-display);font-weight:600;font-size:1.15rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:.5rem}
.brand img{width:2.6rem;height:2.6rem;object-fit:contain}
.brand .dot{color:var(--primary)}
.navbar .nav-link{color:var(--ink-soft);font-weight:500;border-radius:999px;padding:.5rem .85rem!important}
.navbar .nav-link:hover,.navbar .nav-link.active{color:var(--ink);background:var(--sky-soft)}
.navbar-toggler{border:0;padding:.55rem .65rem;border-radius:.8rem}
.dropdown-menu{border:1px solid var(--glass-line);background:var(--glass-strong);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:var(--shadow);border-radius:1.2rem;padding:.6rem;min-width:min(34rem,92vw)}
.mega{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.25rem}
@media (max-width:575.98px){.mega{grid-template-columns:1fr}}
.mega a{display:flex;gap:.65rem;align-items:center;padding:.55rem .6rem;border-radius:.8rem;color:var(--ink);text-decoration:none;font-size:.93rem}
.mega a:hover{background:var(--sky-soft)}
.mega .ic{flex:0 0 2.1rem;height:2.1rem;border-radius:.6rem;display:flex;align-items:center;justify-content:center;color:var(--navy)}
@media (max-width:991.98px){
  .navbar-collapse{padding:.75rem .25rem .4rem}
  .navbar-nav{border-top:1px solid var(--line);padding-top:.6rem;gap:.15rem}
  .navbar-nav .btn{width:100%;margin-top:.5rem}
  .dropdown-menu{box-shadow:none;background:transparent;border:0;padding:0 0 .4rem}
}

/* hero */
.hero{padding-block:3rem 2rem}
.hero-banner{border-radius:1.4rem;overflow:hidden;position:relative}
.hero-banner .carousel-item img{width:100%;aspect-ratio:1730/909;object-fit:cover;display:block}
.hero-banner .cap{position:absolute;left:.9rem;bottom:.9rem;z-index:3}
.hero-banner .cap a{display:inline-flex;align-items:center;gap:.4rem;padding:.4rem .9rem;border-radius:999px;background:var(--glass-strong);color:var(--ink);text-decoration:none;font-weight:600;font-size:.88rem;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
.hero-dots{display:flex;gap:.35rem;flex-wrap:wrap;margin-top:.9rem}
.hero-dots button{width:.55rem;height:.55rem;border-radius:999px;border:0;padding:0;background:var(--line);transition:width .25s}
.hero-dots button.active{width:1.5rem;background:var(--primary)}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}
.chip{display:inline-flex;align-items:center;gap:.35rem;padding:.3rem .75rem;border-radius:999px;font-size:.85rem;font-weight:500;background:var(--glass);border:1px solid var(--glass-line)}
.chip svg{color:var(--primary)}

/* system cards */
.cat-tabs .btn{border-radius:999px;border:1px solid var(--glass-line);color:var(--ink);background:var(--glass);font-size:.9rem;padding:.35rem .95rem;min-height:2.5rem}
.cat-tabs .btn.active{background:var(--primary);border-color:var(--primary);color:var(--on-primary)}
.sys{display:flex;flex-direction:column;border-radius:1.2rem;height:100%;color:var(--ink);text-decoration:none;overflow:hidden;transition:transform .2s,box-shadow .2s}
.sys:hover{transform:translateY(-3px);box-shadow:0 16px 44px rgba(60,100,190,.18);color:var(--ink)}
.sys .thumb{aspect-ratio:16/9;width:100%;max-width:100%;overflow:hidden}
.sys .thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s}
.sys:hover .thumb img{transform:scale(1.04)}
.sys .body{padding:1rem 1.1rem 1.2rem;display:flex;flex-direction:column;gap:.35rem;flex:1}
.sys .tag{align-self:flex-start;font-family:var(--f-mono);font-size:.72rem;padding:.15rem .6rem;border-radius:999px}
.sys h3{margin:0;font-size:1.04rem}
.sys p{margin:0;font-size:.9rem;color:var(--ink-soft)}
.sys-cta{border-radius:1.2rem;height:100%;min-height:14rem;display:flex;flex-direction:column;justify-content:center;gap:.6rem;padding:1.5rem;text-decoration:none;background:var(--primary);color:var(--on-primary)}
.sys-cta:hover{background:var(--primary-hover);color:var(--on-primary)}
.sys-cta p{margin:0;opacity:.9}
.sys .more{margin-top:auto;padding-top:.4rem;font-weight:600;font-size:.9rem;color:var(--primary)}

/* service tiles */
.svc{border-radius:1.4rem;overflow:hidden;height:100%;display:flex;flex-direction:column;text-decoration:none;color:var(--ink)}
.svc img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.svc .body{padding:1.25rem 1.3rem 1.4rem;display:flex;flex-direction:column;gap:.4rem;flex:1}
.svc:hover{color:var(--ink)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;counter-reset:s}
@media (max-width:991.98px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:575.98px){.steps{grid-template-columns:1fr}}
.step{border-radius:1.2rem;padding:1.3rem}
.step .n{width:2.3rem;height:2.3rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--f-display);font-weight:600;background:var(--primary);color:var(--on-primary);margin-bottom:.7rem}
.step p{margin:0;font-size:.92rem;color:var(--ink-soft)}

/* why */
.why-panel{border-radius:1.6rem;padding:2.5rem 2rem}
.feat-ic{width:2.6rem;height:2.6rem;border-radius:.8rem;display:flex;align-items:center;justify-content:center;color:var(--navy);margin-bottom:.6rem}

/* CTA band */
.cta{border-radius:1.6rem;padding:2.25rem 2rem;background:var(--deep);color:var(--deep-ink);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1.5rem}
.cta p{color:var(--deep-soft);margin:0}

/* detail page */
.crumb{font-size:.88rem;color:var(--ink-soft)}
.crumb a{color:var(--ink-soft)}
.detail-hero img{width:100%;border-radius:1.4rem;display:block;box-shadow:var(--shadow)}
.feat-list{list-style:none;padding:0;margin:0;display:grid;gap:.65rem}
.feat-list li{display:flex;gap:.65rem;align-items:flex-start}
.feat-list svg{flex:0 0 auto;color:var(--line-green);margin-top:.25rem}
.side-card{border-radius:1.4rem;padding:1.5rem;position:sticky;top:6.5rem}

/* form */
.form-panel{border-radius:1.6rem;padding:clamp(1.25rem,3vw,2.25rem)}
.form-control,.form-select{background:var(--glass-strong);color:var(--ink);border:1px solid var(--line);border-radius:.9rem;min-height:2.85rem}
.form-control:focus,.form-select:focus{background:var(--glass-strong);color:var(--ink);border-color:var(--primary);box-shadow:0 0 0 4px var(--sky-soft)}
.form-control::placeholder{color:var(--ink-soft);opacity:.8}
.form-label{font-weight:500;font-size:.92rem}
.seg{display:inline-flex;padding:.25rem;border-radius:999px;background:var(--sky-soft);gap:.25rem;flex-wrap:wrap}
.seg button{border:0;background:transparent;color:var(--ink);font-weight:600;padding:.5rem 1.1rem;border-radius:999px;min-height:2.5rem}
.seg button.on{background:var(--glass-strong);box-shadow:var(--shadow);color:var(--primary)}
.pick{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.4rem}
@media (max-width:575.98px){.pick{grid-template-columns:1fr}}
.pick label{display:flex;gap:.5rem;align-items:center;padding:.5rem .7rem;border:1px solid var(--line);border-radius:.8rem;font-size:.9rem;cursor:pointer;background:var(--glass)}
.pick input{accent-color:var(--primary);width:1.05rem;height:1.05rem}
.pick label:has(input:checked){border-color:var(--primary);background:var(--sky-soft)}
.invalid-msg{color:var(--pink);font-size:.85rem}

/* LINE preview */
.phone{max-width:22rem;margin-inline:auto;border-radius:2rem;padding:.7rem;background:var(--deep)}
.phone-screen{border-radius:1.5rem;background:#8CABD9;overflow:hidden}
.phone-top{background:#1F3A6B;color:#fff;padding:.7rem 1rem;font-weight:600;font-size:.9rem;display:flex;align-items:center;gap:.5rem}
.phone-body{padding:1rem;display:grid;gap:.6rem;min-height:16rem;align-content:start}
.bubble{background:#fff;color:#1A2B5F;border-radius:1rem;padding:0;overflow:hidden;font-size:.85rem;max-width:92%;box-shadow:0 2px 6px rgba(0,0,0,.08)}
.bubble .bh{background:var(--line-green);color:#fff;padding:.55rem .8rem;font-weight:600}
.bubble .bb{padding:.6rem .8rem;display:grid;gap:.2rem}
.bubble .bb b{font-weight:600}
.bubble .bf{display:flex;border-top:1px solid #E5ECF7}
.bubble .bf span{flex:1;text-align:center;padding:.5rem;color:#1E7FE0;font-weight:600}
.flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.75rem}
@media (max-width:767.98px){.flow{grid-template-columns:repeat(2,minmax(0,1fr))}}
.flow div{border-radius:1rem;padding:1rem;font-size:.88rem}
.flow b{display:block;font-family:var(--f-display);font-weight:600;font-size:.98rem;margin-bottom:.2rem}
.code{font-family:var(--f-mono);font-size:.78rem;background:var(--deep);color:var(--deep-ink);border-radius:1rem;padding:1rem;overflow-x:auto;white-space:pre;margin:0}

/* footer */
.site-foot{background:var(--deep);color:var(--deep-soft);padding-block:3.5rem 1.5rem;margin-top:3rem}
.site-foot .foot-h{font-family:var(--f-display);font-weight:600;color:var(--deep-ink);font-size:1rem;margin-bottom:.9rem}
.site-foot a{color:var(--deep-soft);text-decoration:none}
.site-foot a:hover{color:var(--deep-ink)}
.site-foot .brand{color:var(--deep-ink)}
.foot-links{list-style:none;padding:0;margin:0;display:grid;gap:.45rem;font-size:.93rem}
.social{display:flex;gap:.5rem}
.social a{width:2.6rem;height:2.6rem;border-radius:50%;display:flex;align-items:center;justify-content:center;border:1px solid var(--deep-line);color:var(--deep-ink)}
.social a:hover{background:rgba(255,255,255,.08)}
.qr{width:6.5rem;height:6.5rem;border-radius:.8rem;border:1px dashed var(--deep-line);display:flex;align-items:center;justify-content:center;text-align:center;font-size:.75rem;padding:.4rem}
.foot-bottom{border-top:1px solid var(--deep-line);margin-top:2.5rem;padding-top:1.25rem;display:flex;flex-wrap:wrap;justify-content:space-between;gap:.75rem;font-size:.85rem}
.ph{opacity:.8}

.to-top{position:fixed;z-index:30;width:3rem;height:3rem;border-radius:50%;right:calc(1.1rem + env(safe-area-inset-right,0px));bottom:calc(1.1rem + env(safe-area-inset-bottom,0px));display:flex;align-items:center;justify-content:center;color:var(--primary);background:var(--glass-strong);border:1px solid var(--glass-line);box-shadow:var(--shadow);opacity:0;transform:translateY(14px);pointer-events:none;transition:opacity .3s,transform .4s cubic-bezier(.34,1.56,.64,1)}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

/* site additions */
.btn-soft-dark{border:1px solid var(--deep-line);background:transparent;color:var(--deep-ink);font-weight:600;padding:.7rem 1.35rem;border-radius:999px}
.btn-soft-dark:hover{background:rgba(255,255,255,.08);color:var(--deep-ink)}
.btn-sm.btn-soft-dark{padding:.35rem .9rem}
.hero-ctrl{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-top:.9rem}
.hero-ctrl .hero-dots{margin-top:0}
.hero-ctrl .pause{width:2.5rem;height:2.5rem;border-radius:50%;border:1px solid var(--glass-line);background:var(--glass);color:var(--ink);display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.contact-list{list-style:none;padding:0;margin:0;display:grid;gap:.6rem}
.contact-list li{display:flex;gap:.6rem;align-items:center}
.contact-list svg{color:var(--primary)}
.qr-img{width:9rem;height:9rem;object-fit:contain;border-radius:.8rem;background:#fff;padding:.4rem;margin-top:1rem;display:block}
.qr-img.qr-sm{width:6.5rem;height:6.5rem;margin-top:0}
.crumb{margin-bottom:1rem}
.form-ok{text-align:center;padding-block:1.5rem}
.article{border-radius:1.4rem;padding:clamp(1.25rem,3vw,2rem);margin-top:.5rem}
.article h2{margin-top:1.25rem}
.article h2:first-child{margin-top:0}
.article p{color:var(--ink-soft);max-width:44rem;margin-bottom:0}
.col-12 > .sys-cta{min-height:auto;flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:space-between}
.col-12 > .sys-cta p{flex:1 1 18rem}
.foot-cols .foot-h{letter-spacing:.01em;margin-bottom:1rem}
.foot-cols .foot-links{gap:.6rem}
.foot-cols .foot-links a{display:inline-block;line-height:1.45}
.foot-brand p{max-width:20rem}
.social{gap:.6rem;flex-wrap:wrap}
.social a:hover{border-color:var(--deep-ink)}
@media (min-width:992px){.foot-cols>div+div{border-left:1px solid var(--deep-line)}}