/* siamtp-desk v1 — โต๊ะเทรด identity
   palette: bg #0B120E · ink #E9E4D8 · green #009923/#2EC553 · gold #ECC966
   fonts: IBM Plex Sans Thai + IBM Plex Mono (self-hosted) */
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/plexsans-thai-thai-400.woff2') format('woff2');unicode-range:U+0E01-0E5B,U+200C-200D,U+25CC}
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/plexsans-thai-latin-400.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/plexsans-thai-thai-500.woff2') format('woff2');unicode-range:U+0E01-0E5B,U+200C-200D,U+25CC}
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/plexsans-thai-latin-500.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/plexsans-thai-thai-600.woff2') format('woff2');unicode-range:U+0E01-0E5B,U+200C-200D,U+25CC}
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/plexsans-thai-latin-600.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/plexsans-thai-thai-700.woff2') format('woff2');unicode-range:U+0E01-0E5B,U+200C-200D,U+25CC}
@font-face{font-family:'IBM Plex Sans Thai';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/plexsans-thai-latin-700.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/plexmono-latin-400.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/plexmono-latin-600.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

:root{
  --bg:#0B120E;--bg2:#0F1811;--panel:#121C15;--line:#22301F;--line2:#2E3F2A;
  --ink:#E9E4D8;--muted:#A7B3A4;--faint:#7E8B7B;
  --green:#009923;--green-hi:#2EC553;--green-dim:#0E3D1C;
  --gold:#ECC966;--up:#3FB68B;--down:#E5484D;
  --sans:'IBM Plex Sans Thai',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased}
/* faint desk grid — one quiet texture */
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:56px 56px;opacity:.18}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;position:relative;z-index:1}
a{color:var(--green-hi);text-decoration:none}
a:hover{text-decoration:underline}
.mono{font-family:var(--mono)}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
img{max-width:100%;height:auto}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:50;background:rgba(11,18,14,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hrow{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;flex-direction:column;line-height:1.15}
.brand .wm{font-family:var(--mono);font-weight:600;font-size:21px;letter-spacing:.06em;color:var(--ink)}
.brand .wm b{color:var(--green-hi);font-weight:600}
.brand .tag{font-size:11.5px;color:var(--faint);letter-spacing:.02em}
nav.main{display:flex;gap:22px;margin-left:auto}
nav.main a{color:var(--muted);font-size:15px;font-weight:500}
nav.main a:hover{color:var(--ink);text-decoration:none}
nav.main a[aria-current=page]{color:var(--green-hi)}
.btn-cta{display:inline-flex;align-items:center;gap:8px;background:var(--green);color:#04150A;font-weight:700;font-size:15px;padding:10px 18px;border-radius:3px;white-space:nowrap}
.btn-cta:hover{background:var(--green-hi);text-decoration:none}
.btn-cta .mono{font-size:13px}
.nav-toggle{display:none;background:none;border:1px solid var(--line2);color:var(--ink);border-radius:3px;padding:6px 10px;font-family:var(--mono);cursor:pointer}

/* ---------- sheet label ---------- */
.sheet{margin:64px 0}
.sheet-label{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--faint);text-transform:uppercase;border-bottom:1px solid var(--line2);padding-bottom:8px;margin-bottom:26px;display:flex;justify-content:space-between}
.sheet-label em{font-style:normal;color:var(--gold)}

/* ---------- hero ---------- */
.hero{padding:72px 0 30px;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero .kick{font-family:var(--mono);font-size:13px;color:var(--green-hi);letter-spacing:.12em;margin-bottom:14px}
.hero h1{font-size:clamp(34px,4.6vw,56px);line-height:1.22;font-weight:700;letter-spacing:-.01em}
.hero h1 .g{color:var(--gold)}
.hero p.lede{margin:22px 0 30px;font-size:19px;color:var(--muted);max-width:34em}
.hero .sub{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.trust{margin-top:26px;font-size:13.5px;color:var(--faint)}
.trust .mono{color:var(--muted)}
.hero-art{position:relative}
.hero-art svg{display:block;width:100%;height:auto}

/* spec strip */
.spec-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line2);border-radius:4px;overflow:hidden;background:var(--bg2)}
.spec-strip .cell{padding:16px 20px;border-right:1px solid var(--line)}
.spec-strip .cell:last-child{border-right:0}
.spec-strip .k{font-size:12.5px;color:var(--faint);margin-bottom:2px}
.spec-strip .v{font-family:var(--mono);font-size:20px;font-weight:600;color:var(--ink)}
.spec-strip .v i{font-style:normal;font-size:12px;color:var(--muted);margin-left:6px}

/* ---------- why rows ---------- */
.why{display:grid;gap:0}
.why .row{display:grid;grid-template-columns:64px 5fr 6fr;gap:24px;padding:26px 0;border-bottom:1px solid var(--line);align-items:baseline}
.why .n{font-family:var(--mono);font-size:26px;color:var(--green-hi)}
.why h3{font-size:21px;font-weight:600;margin-bottom:6px}
.why p{color:var(--muted);font-size:16px}
.why .fact{font-family:var(--mono);font-size:13px;color:var(--gold);margin-top:8px}

/* ---------- accounts ---------- */
.acc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.acc-card{background:var(--panel);border:1px solid var(--line2);border-radius:4px;padding:24px;position:relative}
.acc-card.feat{border-color:var(--green);box-shadow:inset 3px 0 0 var(--green)}
.acc-card .nm{font-size:20px;font-weight:700;display:flex;align-items:center;gap:10px}
.acc-card .nm .pill{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;color:#04150A;background:var(--green-hi);padding:2px 8px;border-radius:2px;font-weight:600}
.acc-card .for{color:var(--faint);font-size:13.5px;margin:4px 0 14px}
.acc-spec{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px;font-size:14.5px}
.acc-spec div{display:flex;justify-content:space-between;border-bottom:1px dashed var(--line);padding-bottom:4px}
.acc-spec .k{color:var(--muted)}
.acc-spec .v{font-family:var(--mono);color:var(--ink)}
.acc-note{margin-top:14px;font-size:12.5px;color:var(--faint)}

/* comparison table */
table.cmp{width:100%;border-collapse:collapse;font-size:14.5px}
table.cmp th,table.cmp td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left}
table.cmp th{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);font-weight:600}
table.cmp td{color:var(--muted)}
table.cmp td:first-child{color:var(--ink);font-weight:600}
table.cmp td.num{color:var(--ink)}
table.cmp tr:hover td{background:var(--bg2)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line2);border-radius:4px;overflow:hidden}
.steps .st{padding:22px;background:var(--bg2);border-right:1px solid var(--line)}
.steps .st:last-child{border-right:0}
.steps .sn{font-family:var(--mono);font-size:13px;color:var(--gold);margin-bottom:8px}
.steps h4{font-size:17px;margin-bottom:6px}
.steps p{font-size:14px;color:var(--muted)}

/* ---------- QR block ---------- */
.qr-block{display:grid;grid-template-columns:300px 1fr;min-width:0;gap:40px;align-items:center;background:var(--panel);border:1px solid var(--line2);border-radius:4px;padding:34px}
.qr-block .qr{background:#fff;padding:14px;border-radius:4px;width:272px}
.qr-block .qr img{display:block;width:100%;height:auto}
.qr-block>div{min-width:0}
.qr-block h3{font-size:24px;margin-bottom:10px}
.qr-block p{color:var(--muted);margin-bottom:16px}
.qr-block .hint{font-family:var(--mono);font-size:12.5px;color:var(--faint);margin-top:14px;word-break:break-all;overflow-wrap:anywhere}

/* ---------- FAQ ---------- */
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;padding:18px 4px;font-weight:600;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:baseline}
.faq summary::-webkit-details-marker{display:none}
.faq summary .q-m{font-family:var(--mono);font-size:13px;color:var(--green-hi);margin-right:12px}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--faint);font-size:20px}
.faq details[open] summary::after{content:"−"}
.faq details .a{padding:0 4px 20px;color:var(--muted);max-width:60em}

/* ---------- prose pages ---------- */
.prose{max-width:68ch}
.prose h1{font-size:clamp(28px,3.4vw,40px);line-height:1.25;margin-bottom:10px}
.prose h2{font-size:23px;margin:36px 0 12px;padding-top:18px;border-top:1px solid var(--line)}
.prose p{margin-bottom:16px;color:var(--muted)}
.prose strong{color:var(--ink)}
.prose ul,.prose ol{margin:0 0 16px 22px;color:var(--muted)}
.prose li{margin-bottom:8px}
.prose blockquote{border-left:3px solid var(--green);padding:6px 18px;margin:20px 0;background:var(--bg2);border-radius:0 4px 4px 0;color:var(--muted)}
.meta-line{font-family:var(--mono);font-size:12.5px;color:var(--faint);margin-bottom:30px}
.updated-tag{font-family:var(--mono);font-size:12px;color:var(--gold);border:1px dashed var(--line2);display:inline-block;padding:4px 12px;border-radius:3px;margin-bottom:26px}

/* platform cards */
.plat{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.plat .pc{border:1px solid var(--line2);border-radius:4px;padding:24px;background:var(--panel)}
.plat .pc .head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.plat .pc .head .m{font-family:var(--mono);font-weight:600;font-size:19px;color:var(--ink)}
.plat .pc p{color:var(--muted);font-size:15px;margin-bottom:14px}
.dl-links{display:flex;flex-wrap:wrap;gap:10px}
.dl-links a{font-family:var(--mono);font-size:13px;border:1px solid var(--line2);border-radius:3px;padding:7px 12px;color:var(--muted)}
.dl-links a:hover{border-color:var(--green);color:var(--ink);text-decoration:none}

/* blog list */
.blog-list .post{display:grid;grid-template-columns:120px 1fr auto;gap:20px;padding:20px 0;border-bottom:1px solid var(--line);align-items:baseline}
.blog-list .d{font-family:var(--mono);font-size:13px;color:var(--faint)}
.blog-list .t a{font-size:18px;font-weight:600;color:var(--ink)}
.blog-list .t p{font-size:14px;color:var(--muted);margin-top:2px}
.blog-list .c{font-family:var(--mono);font-size:12px;color:var(--green-hi)}
.empty-note{border:1px dashed var(--line2);border-radius:4px;padding:30px;color:var(--muted);font-size:15px}

/* article */
.article{max-width:70ch}
.article .head h1{font-size:clamp(26px,3.2vw,38px);line-height:1.28;margin:8px 0 14px}
.article .body{color:var(--muted)}
.article .body p{margin-bottom:16px}
.article .body h2{font-size:22px;color:var(--ink);margin:34px 0 12px}
.article .body ul{margin:0 0 16px 22px}
.article .body li{margin-bottom:8px}

/* contact ch */
.chan{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.chan .ch{border:1px solid var(--line2);border-radius:4px;padding:22px;background:var(--panel)}
.chan .ch .l{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--faint);text-transform:uppercase;margin-bottom:8px}
.chan .ch .v{font-size:17px;font-weight:600}
.chan .ch p{font-size:13.5px;color:var(--muted);margin-top:6px}

/* ---------- footer ---------- */
footer.site{margin-top:90px;border-top:1px solid var(--line2);background:var(--bg2)}
.fgrid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding:46px 0 30px}
.fgrid .fh,.fgrid h5{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin-bottom:14px}
.fgrid ul{list-style:none}
.fgrid li{margin-bottom:9px}
.fgrid a{color:var(--muted);font-size:14.5px}
.fgrid a:hover{color:var(--ink)}
.fgrid .about-p{color:var(--muted);font-size:14px;max-width:30em}
.fbar{border-top:1px solid var(--line);padding:18px 0;display:flex;justify-content:space-between;gap:20px;font-size:13px;color:var(--faint);flex-wrap:wrap}
.risk{padding:26px 0;font-size:12.5px;color:var(--faint);border-top:1px solid var(--line);line-height:1.7}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero{grid-template-columns:1fr;padding-top:48px}
  .spec-strip{grid-template-columns:repeat(2,1fr)}
  .spec-strip .cell:nth-child(2){border-right:0}
  .acc-grid,.plat{grid-template-columns:1fr}
  .why .row{grid-template-columns:44px 1fr}
  .why .fact{grid-column:2}
  .qr-block{grid-template-columns:1fr}
  .qr-block .qr{margin:0 auto}
  .steps{grid-template-columns:1fr}
  .steps .st{border-right:0;border-bottom:1px solid var(--line)}
  .fgrid{grid-template-columns:1fr 1fr}
  .chan{grid-template-columns:1fr}
  .blog-list .post{grid-template-columns:1fr}
  .blog-list .c{display:none}
}
@media(max-width:720px){
  nav.main{display:none;position:absolute;top:66px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line2);flex-direction:column;padding:18px 24px;gap:16px}
  nav.main.open{display:flex}
  .nav-toggle{display:block;margin-left:auto}
  .brand .tag{display:none}
  body{font-size:16px}
  table.cmp{font-size:13px;display:block;overflow-x:auto}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* a11y: heading-order shape classes + distinguishable in-text links */
.why .h3s{font-size:21px;font-weight:600;margin-bottom:6px}
.steps .h4s{font-size:17px;margin-bottom:6px}
.qr-block .h3s{font-size:24px;margin-bottom:10px}
.prose p a,.prose li a,.acc-note a,.sheet-label em a,.why p a,.qr-block p a,.empty-note a,.chan .ch a{ text-decoration:underline; text-underline-offset:3px }
.fgrid a{text-decoration:none}
.risk a{text-decoration:underline;text-underline-offset:3px;color:var(--green-hi)}
.fgrid li a:hover{text-decoration:underline}