/* Layout: field work-order vernacular — light paper, navy ink, hi-vis orange for action, fiber-aqua for detail. One bold moment: the dispatch ticket in the hero. */
:root {
  --paper: #F4F6F8;
  --card: #FFFFFF;
  --ink: #0E1B2C;
  --ink-2: #47566A;
  --line: #D3DAE3;
  --signal: #F26A1B;
  --signal-ink: #1A0E05;
  --fiber: #0F8F94;
  --danger: #B42318;
  --navy-band: #0E1B2C;
  --on-navy: #E8EEF5;
  --on-navy-2: #9FB0C4;

  --f-display: "Archivo", "Arial Narrow", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", "IBM Plex Sans Thai", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-thai: "IBM Plex Sans Thai", "IBM Plex Sans", system-ui, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --s-1: 0.25rem; --s-2: 0.5rem; --s-3: 0.75rem; --s-4: 1rem; --s-5: 1.5rem; --s-6: 2rem; --s-7: 3rem; --s-8: 4.5rem;
  --radius: 6px;
  --wrap: 1160px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 2px; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.thai { font-family: var(--f-thai); }

h1, h2, h3 { font-family: var(--f-display); font-stretch: 112%; line-height: 1.08; margin: 0; text-wrap: balance; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 760; }
h3 { font-size: 1.15rem; font-weight: 700; font-stretch: 105%; }
p { margin: 0; }
.lede { font-size: 1.125rem; color: var(--ink-2); max-width: 60ch; }
.eyebrow {
  font-family: var(--f-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--fiber); font-weight: 500;
}

/* Header */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--paper); }
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: var(--s-5); padding-block: var(--s-3); }
.brand { display: flex; align-items: center; gap: var(--s-2); text-decoration: none; font-family: var(--f-display); font-weight: 800; font-stretch: 110%; font-size: 1.05rem; }
.brand-mark { width: 34px; height: 34px; flex: none; }
.brand small { display: block; font-family: var(--f-mono); font-weight: 400; font-size: 0.68rem; letter-spacing: 0.08em; color: var(--ink-2); font-stretch: 100%; }
.nav { display: flex; gap: var(--s-5); margin-left: auto; font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--ink-2); }
.nav a:hover { color: var(--ink); }
@media (max-width: 900px) { .nav { display: none; } .site-header .btn { margin-left: auto; } }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  font-family: var(--f-body); font-weight: 600; font-size: 0.98rem; line-height: 1.2;
  padding: 0.8rem 1.2rem; border-radius: var(--radius); border: 1.5px solid transparent;
  text-decoration: none; cursor: pointer; white-space: nowrap;
}
.btn-signal { background: var(--signal); color: var(--signal-ink); }
.btn-signal:hover { background: color-mix(in srgb, var(--signal) 88%, black); }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-line { background: #06C755; color: #04210F; }
.btn-line:hover { background: #05B04B; }
.btn-sm { padding: 0.55rem 0.9rem; font-size: 0.9rem; }

/* Hero */
.hero { padding-block: var(--s-8) var(--s-7); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: var(--s-7); align-items: center; }
.hero-copy { display: grid; gap: var(--s-5); min-width: 0; }
.hero-copy .thai { color: var(--ink-2); font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--s-3); }
.hero-facts { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); font-size: 0.9rem; color: var(--ink-2); padding-top: var(--s-2); }
.hero-facts span::before { content: "■ "; color: var(--fiber); font-size: 0.7em; vertical-align: 0.15em; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-block: var(--s-7) var(--s-6); } }

/* Ticket */
.ticket {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 1px 0 var(--line), 0 18px 40px -24px rgba(14, 27, 44, 0.35);
  font-family: var(--f-mono); font-size: 0.85rem; position: relative; min-width: 0;
  transform: rotate(1.2deg);
}
@media (max-width: 900px) { .ticket { transform: none; } }
.ticket-head {
  display: flex; justify-content: space-between; gap: var(--s-3); align-items: center;
  padding: var(--s-3) var(--s-4); border-bottom: 2px dashed var(--line);
}
.ticket-head b { font-weight: 600; letter-spacing: 0.06em; }
.tag { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; padding: 0.15rem 0.5rem; border-radius: 3px; background: color-mix(in srgb, var(--fiber) 14%, transparent); color: var(--fiber); }
.ticket dl { margin: 0; padding: var(--s-4); display: grid; grid-template-columns: auto 1fr; gap: var(--s-2) var(--s-4); }
.ticket dt { color: var(--ink-2); text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.1em; padding-top: 0.15rem; }
.ticket dd { margin: 0; font-family: var(--f-body); font-size: 0.92rem; min-width: 0; }
.ticket ol { margin: 0; padding-left: 1.1rem; }
.ticket-foot { display: flex; align-items: center; gap: var(--s-2); padding: var(--s-3) var(--s-4); border-top: 1px solid var(--line); background: color-mix(in srgb, var(--signal) 9%, var(--card)); border-radius: 0 0 var(--radius) var(--radius); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--signal); flex: none; }
.ticket-note { font-family: var(--f-body); font-size: 0.78rem; color: var(--ink-2); margin-top: var(--s-2); text-align: right; }

/* Sections */
section { scroll-margin-top: 80px; }
.band { padding-block: var(--s-8); }
.band-head { display: grid; gap: var(--s-3); margin-bottom: var(--s-6); max-width: 720px; }
.band-white { background: var(--card); border-block: 1px solid var(--line); }

/* Clients strip */
.who { border-block: 1px solid var(--line); background: var(--card); }
.who .wrap { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--s-3) var(--s-6); padding-block: var(--s-5); }
.who .eyebrow { color: var(--ink-2); }
.who ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); font-weight: 600; }

/* Service grid */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-3 { grid-template-columns: 1fr; } }
.svc { background: var(--card); padding: var(--s-5); display: grid; gap: var(--s-3); align-content: start; min-width: 0; }
.svc-code { font-family: var(--f-mono); font-size: 0.72rem; color: var(--fiber); letter-spacing: 0.1em; }
.svc p { color: var(--ink-2); font-size: 0.95rem; }
.svc ul { margin: 0; padding-left: 1.1rem; font-size: 0.9rem; color: var(--ink-2); }

/* Engagement models */
.models { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-4); margin-top: var(--s-6); }
@media (max-width: 800px) { .models { grid-template-columns: 1fr; } }
.model { border-top: 3px solid var(--ink); padding-top: var(--s-3); display: grid; gap: var(--s-2); }
.model p { color: var(--ink-2); font-size: 0.95rem; }

/* Process */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-5); counter-reset: step; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.steps li { counter-increment: step; display: grid; gap: var(--s-2); align-content: start; }
.steps li::before { content: "STEP " counter(step); font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.12em; color: var(--signal); font-weight: 600; }
.steps p { color: var(--ink-2); font-size: 0.95rem; }

/* About */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-7); align-items: start; }
@media (max-width: 860px) { .about { grid-template-columns: 1fr; gap: var(--s-5); } }
.about-copy { display: grid; gap: var(--s-4); min-width: 0; }
.about-copy p { color: var(--ink-2); }
.facts { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.facts li { display: grid; grid-template-columns: 9.5rem 1fr; gap: var(--s-4); padding-block: var(--s-3); border-bottom: 1px solid var(--line); min-width: 0; }
.facts span { font-family: var(--f-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); padding-top: 0.2rem; }
@media (max-width: 480px) { .facts li { grid-template-columns: 1fr; gap: var(--s-1); } }

/* Navy band (software) */
.navy { background: var(--navy-band); color: var(--on-navy); }
.navy .eyebrow { color: #5FD0D4; }
.navy .lede, .navy p { color: var(--on-navy-2); }
.sw { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--s-7); align-items: start; }
@media (max-width: 860px) { .sw { grid-template-columns: 1fr; gap: var(--s-5); } }
.sw-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-top: 1px solid rgba(255,255,255,0.14); }
.sw-list li { padding-block: var(--s-4); border-bottom: 1px solid rgba(255,255,255,0.14); display: grid; gap: var(--s-1); }
.navy .sw-list p.thai { color: #5FD0D4; font-size: 0.85rem; }
.sw-list h3 { color: #FFFFFF; }
.sw-copy { display: grid; gap: var(--s-4); }
.sw-copy .btn-ghost { border-color: var(--on-navy); color: var(--on-navy); }
.sw-copy .btn-ghost:hover { background: var(--on-navy); color: var(--ink); }

/* Forms */
.form-wrap { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: var(--s-7); align-items: start; }
@media (max-width: 900px) { .form-wrap { grid-template-columns: 1fr; gap: var(--s-5); } }
.form-side { display: grid; gap: var(--s-4); }
.form-side p { color: var(--ink-2); }
form.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s-5); display: grid; gap: var(--s-4); min-width: 0; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-4); }
@media (max-width: 560px) { .row { grid-template-columns: 1fr; } }
.field { display: grid; gap: var(--s-1); min-width: 0; }
label, legend { font-weight: 600; font-size: 0.9rem; }
.hint { font-weight: 400; color: var(--ink-2); font-size: 0.82rem; }
input, select, textarea {
  font: inherit; font-size: 1rem; color: var(--ink); background: var(--paper);
  border: 1.5px solid var(--line); border-radius: var(--radius); padding: 0.65rem 0.75rem; width: 100%;
}
input:focus, select:focus, textarea:focus { border-color: var(--ink); outline: none; box-shadow: 0 0 0 3px color-mix(in srgb, var(--signal) 35%, transparent); }
textarea { min-height: 120px; resize: vertical; }
fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: var(--s-2); min-width: 0; }
.checks { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.checks label { font-weight: 500; display: inline-flex; align-items: center; gap: var(--s-2); padding: 0.4rem 0.7rem; border: 1.5px solid var(--line); border-radius: 999px; cursor: pointer; background: var(--paper); font-size: 0.88rem; }
.checks input { width: auto; accent-color: var(--signal); margin: 0; }
.checks label:has(input:checked) { border-color: var(--ink); background: var(--card); }
.hidden-field { position: absolute; left: -9999px; }
.form-note { font-size: 0.82rem; color: var(--ink-2); }
.field-error { color: var(--danger); font-size: 0.82rem; font-weight: 500; }
fieldset .field-error { margin-top: calc(var(--s-1) * -1); }
[aria-invalid="true"]:is(input, select, textarea) { border-color: var(--danger); }
[aria-invalid="true"]:is(input, select, textarea):focus { box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 25%, transparent); }
fieldset[aria-invalid="true"] .checks label { border-color: color-mix(in srgb, var(--danger) 55%, var(--line)); }
.form-error { color: var(--danger); font-weight: 600; font-size: 0.9rem; }
button[disabled] { opacity: 0.65; cursor: progress; }
.preview-msg { background: color-mix(in srgb, var(--fiber) 12%, var(--card)); border: 1px solid var(--fiber); border-radius: var(--radius); padding: var(--s-3) var(--s-4); font-size: 0.9rem; }

/* Join banner */
.join-banner { background: var(--signal); color: var(--signal-ink); }
.join-banner .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--s-5); padding-block: var(--s-7); }
.join-banner h2 { max-width: 22ch; }
.join-banner p { max-width: 55ch; margin-top: var(--s-2); }
.join-banner .btn { background: var(--ink); color: #FFFFFF; }
.join-banner .btn:hover { background: #000; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-4); }
@media (max-width: 900px) { .contact-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-item { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s-4); display: grid; gap: var(--s-2); align-content: start; min-width: 0; }
.contact-item span { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.contact-item a, .contact-item p { font-weight: 600; overflow-wrap: anywhere; text-decoration: none; }
.contact-item a:hover { text-decoration: underline; }
.contact-item p.addr { font-weight: 500; font-size: 0.92rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding-block: var(--s-6); font-size: 0.88rem; color: var(--ink-2); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-4); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: var(--s-4); }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }

/* Join page */
.join-hero { padding-block: var(--s-7) var(--s-5); }
.join-hero .wrap { display: grid; gap: var(--s-4); }
.perks { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-4); }
@media (max-width: 800px) { .perks { grid-template-columns: 1fr; } }
.perk { border-top: 3px solid var(--signal); padding-top: var(--s-3); display: grid; gap: var(--s-1); }
.perk p { color: var(--ink-2); font-size: 0.95rem; }
.narrow { max-width: 820px; }

/* Brand lockup */
.brand-mark { width: 40px; height: 40px; }
.brand-name { font-family: "Archivo", system-ui, sans-serif; font-weight: 800; letter-spacing: 0.18em; font-size: 1.05rem; line-height: 1.1; }
.brand-name small { letter-spacing: 0.12em; font-family: var(--f-body); font-weight: 500; font-size: 0.7rem; color: var(--fiber); text-transform: none; }
.btn-wa { background: #25D366; color: #052E14; }
.btn-wa:hover { background: #1EBE5A; }

/* FAQ */
.faq { display: grid; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding-block: var(--s-4); }
.faq summary { cursor: pointer; font-weight: 600; font-size: 1.05rem; list-style: none; display: flex; justify-content: space-between; gap: var(--s-4); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--f-mono); color: var(--signal); font-size: 1.2rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--ink-2); margin-top: var(--s-2); max-width: 65ch; }