/* ==========================================================================
   ThaDigital Enterprise - core design system
   Tokens, reset, layout, chrome, and marketing components.
   ========================================================================== */

:root{
  /* --- ink scale (dark surfaces) --- */
  --ink-900:#08090B;
  --ink-850:#0B0C0E;
  --ink-800:#0F1114;
  --ink-750:#131519;
  --ink-700:#171A1F;
  --ink-600:#1E2228;
  --ink-500:#272C33;

  /* --- paper scale (light surfaces) --- */
  --paper-000:#FFFFFF;
  --paper-050:#F7F8F6;
  --paper-100:#F1F2EF;
  --paper-200:#E5E7E2;
  --paper-300:#D5D8D2;

  /* --- text --- */
  --tx-on-dark:#EDEFF2;
  --tx-on-dark-soft:#A8AEB8;
  --tx-on-dark-faint:#767D86;   /* AA on ink-900/850/800 */
  --tx-on-light:#0F1114;
  --tx-on-light-soft:#4A525C;
  --tx-on-light-faint:#686E78;  /* AA on paper-100 and white */

  /* --- accent --- */
  --amber:#E2A33C;
  --amber-bright:#F3BA5C;
  --amber-deep:#93651D;         /* AA for small text on light bands */
  --amber-wash:rgba(226,163,60,0.10);
  --amber-line:rgba(226,163,60,0.32);

  /* --- semantic --- */
  --good:#3DA35D;
  --good-soft:#E8F4EC;
  --warn:#D08A1E;
  --warn-soft:#FBF1DE;
  --bad:#C6453C;
  --bad-soft:#FAEBEA;
  --info:#3C7FB1;
  --info-soft:#E9F1F7;

  /* --- lines --- */
  --line-dark:rgba(255,255,255,0.085);
  --line-dark-strong:rgba(255,255,255,0.17);
  --line-light:rgba(15,17,20,0.11);
  --line-light-strong:rgba(15,17,20,0.22);

  /* --- type --- */
  --font-display:'Space Grotesk',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --font-mono:'JetBrains Mono','SF Mono',Consolas,'Liberation Mono',monospace;

  /* --- metrics --- */
  --r-sm:3px;
  --r:5px;
  --r-lg:8px;
  --r-xl:14px;
  --maxw:1200px;
  --gutter:clamp(20px,5vw,40px);
  --header-h:68px;

  --shadow-sm:0 1px 2px rgba(8,9,11,.10), 0 2px 6px rgba(8,9,11,.06);
  --shadow:0 2px 6px rgba(8,9,11,.10), 0 10px 28px rgba(8,9,11,.10);
  --shadow-lg:0 4px 12px rgba(8,9,11,.12), 0 24px 60px rgba(8,9,11,.16);
  --shadow-dark:0 12px 40px rgba(0,0,0,.5);

  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}

html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background:var(--ink-850);
  color:var(--tx-on-dark);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.62;
  font-feature-settings:'cv05' 1,'cv08' 1;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  margin:0;
  line-height:1.12;
  letter-spacing:-0.022em;
  font-weight:600;
}
h1{font-size:clamp(2.15rem,5.4vw,4rem);letter-spacing:-0.032em;}
h2{font-size:clamp(1.7rem,3.6vw,2.65rem);letter-spacing:-0.028em;}
h3{font-size:clamp(1.15rem,2vw,1.42rem);}
h4{font-size:1.02rem;letter-spacing:-0.012em;}
/* an h4-sized h3: used where the correct heading LEVEL is 3 but the
   visual weight of an h4 is what the layout actually wants */
h3.card-h{font-size:1.02rem;letter-spacing:-0.012em;}
p{margin:0;}
ul,ol{margin:0;padding:0;}
a{color:inherit;text-decoration:none;}
img,svg,video{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:none;padding:0;}
table{border-collapse:collapse;width:100%;}
::selection{background:var(--amber);color:#0B0C0E;}

:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
  border-radius:2px;
}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

.skip-link{
  position:absolute;top:-100px;left:16px;z-index:400;
  background:var(--amber);color:#0B0C0E;padding:11px 18px;
  border-radius:var(--r);font-weight:600;font-size:.9rem;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:14px;}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

/* ==========================================================================
   Layout
   ========================================================================== */

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter);}
.wrap-narrow{max-width:820px;}
.wrap-wide{max-width:1400px;}

section{position:relative;}
.band{padding-block:clamp(60px,9vw,124px);}
.band-sm{padding-block:clamp(44px,6vw,76px);}

.band-dark{background:var(--ink-850);color:var(--tx-on-dark);}
.band-darker{background:var(--ink-900);color:var(--tx-on-dark);}
.band-panel{background:var(--ink-800);color:var(--tx-on-dark);}
.band-paper{background:var(--paper-100);color:var(--tx-on-light);}
.band-paper-alt{background:var(--paper-050);color:var(--tx-on-light);}
.band-white{background:var(--paper-000);color:var(--tx-on-light);}

.band-paper h1,.band-paper h2,.band-paper h3,.band-paper h4,
.band-paper-alt h1,.band-paper-alt h2,.band-paper-alt h3,.band-paper-alt h4,
.band-white h1,.band-white h2,.band-white h3,.band-white h4{color:var(--tx-on-light);}

/* engineering-drawing hairline grid */
.gridlines::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,var(--line-dark) 1px,transparent 1px),
    linear-gradient(to bottom,var(--line-dark) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 20%,transparent 78%);
  opacity:.75;
}
.gridlines>*{position:relative;z-index:1;}

/* section rule with end ticks */
.rule-top{border-top:1px solid var(--line-dark);}
.band-paper.rule-top,.band-paper-alt.rule-top,.band-white.rule-top{border-top-color:var(--line-light);}

/* ==========================================================================
   Type helpers
   ========================================================================== */

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);
  font-size:.71rem;font-weight:500;
  letter-spacing:.17em;text-transform:uppercase;
  color:var(--amber);
  margin-bottom:20px;
}
.eyebrow::before{
  content:"";width:22px;height:1px;background:var(--amber);opacity:.65;flex:none;
}
.band-paper .eyebrow,.band-paper-alt .eyebrow,.band-white .eyebrow{color:var(--amber-deep);}
.band-paper .eyebrow::before,.band-paper-alt .eyebrow::before,.band-white .eyebrow::before{background:var(--amber-deep);}

.lede{
  font-size:clamp(1.02rem,1.55vw,1.2rem);
  line-height:1.66;
  color:var(--tx-on-dark-soft);
  max-width:64ch;
}
.band-paper .lede,.band-paper-alt .lede,.band-white .lede{color:var(--tx-on-light-soft);}

.muted{color:var(--tx-on-dark-soft);}
.band-paper .muted,.band-paper-alt .muted,.band-white .muted{color:var(--tx-on-light-soft);}
.faint{color:var(--tx-on-dark-faint);}
.band-paper .faint,.band-paper-alt .faint,.band-white .faint{color:var(--tx-on-light-faint);}

.mono{font-family:var(--font-mono);font-size:.85em;letter-spacing:-.01em;}
.amber{color:var(--amber);}
.band-paper .amber,.band-white .amber{color:var(--amber-deep);}

.section-head{max-width:auto;margin-bottom:clamp(34px,4.5vw,58px);}
.section-head h2{margin-bottom:18px;}
.section-head.center{text-align:center;margin-inline:auto;max-width:760px;}
.section-head.center .eyebrow{justify-content:center;}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;
  border-radius:var(--r);
  font-family:var(--font-body);
  font-size:.925rem;font-weight:600;letter-spacing:-.005em;
  border:1px solid transparent;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),
             color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
  text-align:center;
}
.btn:active{transform:translateY(1px);}
.btn svg{width:17px;height:17px;flex:none;}

.btn-primary{background:var(--amber);color:#0B0C0E;box-shadow:0 1px 0 rgba(255,255,255,.22) inset;}
.btn-primary:hover{background:var(--amber-bright);}

.btn-ghost{border-color:var(--line-dark-strong);color:var(--tx-on-dark);}
.btn-ghost:hover{border-color:var(--amber);color:var(--amber);background:var(--amber-wash);}
.band-paper .btn-ghost,.band-paper-alt .btn-ghost,.band-white .btn-ghost{
  border-color:var(--line-light-strong);color:var(--tx-on-light);
}
.band-paper .btn-ghost:hover,.band-paper-alt .btn-ghost:hover,.band-white .btn-ghost:hover{
  border-color:var(--amber-deep);color:var(--amber-deep);background:var(--amber-wash);
}

.btn-solid-dark{background:var(--ink-850);color:var(--tx-on-dark);}
.btn-solid-dark:hover{background:var(--ink-700);}

.btn-sm{padding:9px 16px;font-size:.85rem;}
.btn-lg{padding:16px 30px;font-size:1rem;}
.btn-block{width:100%;}

.link-arrow{
  display:inline-flex;align-items:center;gap:7px;
  font-weight:600;font-size:.92rem;color:var(--amber);
  transition:gap .18s var(--ease);
}
.link-arrow:hover{gap:12px;}
.link-arrow::after{content:"→";font-family:var(--font-mono);}
.band-paper .link-arrow,.band-white .link-arrow,.band-paper-alt .link-arrow{color:var(--amber-deep);}

.btn-row{display:flex;flex-wrap:wrap;gap:12px;}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:200;
  height:var(--header-h);
  display:flex;align-items:center;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .25s var(--ease),border-color .25s var(--ease),
             backdrop-filter .25s var(--ease);
}
.site-header.is-stuck{
  background:rgba(11,12,14,.86);
  backdrop-filter:blur(14px) saturate(1.4);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  border-bottom-color:var(--line-dark);
}
body.header-solid .site-header{
  background:rgba(11,12,14,.86);
  backdrop-filter:blur(14px) saturate(1.4);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  border-bottom-color:var(--line-dark);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;}

.brand{display:flex;align-items:center;gap:11px;flex:none;}
.brand img{width:30px;height:30px;}
.brand-text{display:flex;flex-direction:column;line-height:1;}
.brand-name{
  font-family:var(--font-display);font-weight:600;font-size:1.02rem;
  letter-spacing:-.02em;color:var(--tx-on-dark);
}
.brand-sub{
  font-family:var(--font-mono);font-size:.575rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--tx-on-dark-faint);margin-top:4px;
}

.nav{display:flex;align-items:center;gap:6px;}
.nav a{
  padding:9px 13px;border-radius:var(--r);
  font-size:.895rem;font-weight:500;color:var(--tx-on-dark-soft);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav a:hover{color:var(--tx-on-dark);background:rgba(255,255,255,.05);}
.nav a[aria-current="page"]{color:var(--amber);}

.header-actions{display:flex;align-items:center;gap:10px;flex:none;}

/* the nav carries its own CTA for the mobile drawer only */
.nav > .btn{display:none;}

.nav-toggle{
  display:none;width:42px;height:42px;
  align-items:center;justify-content:center;
  border:1px solid var(--line-dark-strong);border-radius:var(--r);
  color:var(--tx-on-dark);
}
.nav-toggle span{
  display:block;width:17px;height:1.5px;background:currentColor;position:relative;
  transition:background-color .2s var(--ease);
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:17px;height:1.5px;background:currentColor;
  transition:transform .24s var(--ease);
}
.nav-toggle span::before{top:-5.5px;}
.nav-toggle span::after{top:5.5px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(5.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-5.5px) rotate(-45deg);}

@media (max-width:1000px){
  .nav-toggle{display:flex;}
  .header-actions .btn{display:none;}
  .nav{
    position:fixed;top:var(--header-h);left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(11,12,14,.985);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line-dark);
    padding:14px var(--gutter) 26px;
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    transform:translateY(-8px);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  }
  .nav.is-open{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto;}
  .nav a{padding:14px 6px;font-size:1.02rem;border-bottom:1px solid var(--line-dark);}
  .nav > .btn{display:inline-flex;margin-top:16px;border-bottom:none;padding:14px 22px;}
}

.header-spacer{height:var(--header-h);}

/* ==========================================================================
   Cards & surfaces
   ========================================================================== */

.card{
  background:var(--ink-800);
  border:1px solid var(--line-dark);
  border-radius:var(--r-lg);
  padding:26px;
  transition:border-color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease);
}
.card-hover:hover{border-color:var(--line-dark-strong);background:var(--ink-750);transform:translateY(-2px);}

.band-paper .card,.band-paper-alt .card,.band-white .card{
  background:var(--paper-000);border-color:var(--line-light);box-shadow:var(--shadow-sm);
}
.band-paper .card-hover:hover,.band-paper-alt .card-hover:hover,.band-white .card-hover:hover{
  background:var(--paper-000);border-color:var(--line-light-strong);box-shadow:var(--shadow);
}

.grid{display:grid;gap:clamp(14px,1.8vw,22px);}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr));}
@media (max-width:1000px){
  .g-3,.g-4{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:620px){
  .g-2,.g-3,.g-4{grid-template-columns:minmax(0,1fr);}
}

/* icon plate */
.iplate{
  width:42px;height:42px;flex:none;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--r);
  background:var(--amber-wash);
  border:1px solid var(--amber-line);
  color:var(--amber);
  margin-bottom:18px;
}
.iplate svg{width:20px;height:20px;}
.band-paper .iplate,.band-paper-alt .iplate,.band-white .iplate{color:var(--amber-deep);}

/* tag / chip */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:100px;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.06em;
  text-transform:uppercase;font-weight:500;
  border:1px solid var(--line-dark-strong);color:var(--tx-on-dark-soft);
}
.band-paper .tag,.band-paper-alt .tag,.band-white .tag{
  border-color:var(--line-light-strong);color:var(--tx-on-light-soft);
}
.tag-amber{border-color:var(--amber-line);color:var(--amber);background:var(--amber-wash);}
.band-paper .tag-amber,.band-white .tag-amber{color:var(--amber-deep);}

.tag-row{display:flex;flex-wrap:wrap;gap:7px;}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line-dark);
  padding-block:clamp(48px,6vw,74px) 30px;
  color:var(--tx-on-dark-soft);
  font-size:.9rem;
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:clamp(28px,4vw,48px);
  padding-bottom:44px;
  border-bottom:1px solid var(--line-dark);
}
@media (max-width:900px){.footer-top{grid-template-columns:1fr 1fr;}}
@media (max-width:560px){.footer-top{grid-template-columns:1fr;gap:32px;}}

.footer-col h4,.footer-col .card-h{
  font-family:var(--font-mono);font-size:.68rem;font-weight:500;
  letter-spacing:.17em;text-transform:uppercase;
  color:var(--tx-on-dark-faint);margin-bottom:16px;
}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:var(--tx-on-dark-soft);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--amber);}

.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{max-width:34ch;line-height:1.68;color:var(--tx-on-dark-soft);}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px;padding-top:26px;
  font-size:.83rem;color:var(--tx-on-dark-faint);
}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:20px;}
.footer-bottom a:hover{color:var(--amber);}

/* ==========================================================================
   Floating WhatsApp
   ========================================================================== */

.wa-fab{
  position:fixed;right:18px;bottom:18px;z-index:150;
  width:52px;height:52px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:#25D366;color:#fff;
  box-shadow:0 6px 22px rgba(0,0,0,.34);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.wa-fab:hover{transform:scale(1.07);box-shadow:0 10px 30px rgba(0,0,0,.42);}
.wa-fab svg{width:27px;height:27px;}
@media (max-width:700px){.wa-fab{width:48px;height:48px;right:14px;bottom:14px;}}
@media print{.wa-fab,.site-header{display:none;}}

/* ==========================================================================
   Reveal on scroll
   ========================================================================== */

.reveal{opacity:0;transform:translateY(16px);}
.reveal.is-in{opacity:1;transform:none;transition:opacity .6s var(--ease),transform .6s var(--ease);}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;}}

/* ==========================================================================
   Utility
   ========================================================================== */

.center{text-align:center;}
.stack{display:flex;flex-direction:column;}
.stack-sm{gap:10px;} .stack-md{gap:18px;} .stack-lg{gap:30px;}
.row{display:flex;align-items:center;}
.row-gap{gap:12px;}
.wrapflex{flex-wrap:wrap;}
.mt-0{margin-top:0;} .mt-1{margin-top:10px;} .mt-2{margin-top:18px;}
.mt-3{margin-top:28px;} .mt-4{margin-top:42px;}
.mb-2{margin-bottom:18px;} .mb-3{margin-bottom:28px;}
.hide-sm{display:initial;}
@media (max-width:620px){.hide-sm{display:none;}}
.nowrap{white-space:nowrap;}
.scroll-x{overflow-x:auto;-webkit-overflow-scrolling:touch;}


/* ==========================================================================
   Small-screen polish
   Found by auditing every page at 320px, the narrowest screen still in real
   use. Each rule below fixes something that genuinely broke there.
   ========================================================================== */

/* A long button label must be allowed to wrap rather than push the page wide.
   .btn sets white-space:nowrap, which is right until the viewport is 320px. */
@media (max-width:420px){
  .btn{white-space:normal;}
  .btn-lg{padding-inline:18px;font-size:.94rem;}
}

/* Wide tables in prose scroll inside their own frame instead of stretching
   the page. The wrapper is added by site.js so the markup stays clean. */
.table-scroll{
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  margin-bottom:22px;
  border-radius:var(--r);
}
.table-scroll > table{margin-bottom:0;min-width:420px;}

/* ---- touch target sizes (WCAG 2.5.8) -------------------------------------
   These are standalone calls to action, not links inside a sentence, so the
   inline-text exemption does not apply. The hit area is extended with a
   pseudo-element so nothing about the visual layout shifts. */
.link-arrow{position:relative;}
@media (max-width:640px), (pointer:coarse){
  .link-arrow::before{
    content:"";
    position:absolute;
    left:0;right:0;top:50%;
    transform:translateY(-50%);
    height:44px;
  }
  a.tag{
    min-height:36px;
    padding-block:8px;
  }
}

/* Footer navigation is a genuine list of targets, not links inside a
   sentence, so it needs a thumb-sized hit area on a phone. The gap shrinks
   by the same amount the padding grows, so the rhythm is unchanged. */
@media (max-width:640px), (pointer:coarse){
  .footer-col ul{gap:1px;}
  .footer-col li a{display:inline-block;padding-block:8px;}
  .footer-bottom nav{gap:6px 20px;}
  .footer-bottom nav a{display:inline-block;padding-block:7px;}
}

/* Breadcrumbs are a row of navigation targets, so they get the same
   treatment as the footer list on a narrow screen. */
@media (max-width:640px), (pointer:coarse){
  .crumbs{gap:4px 9px;}
  .crumbs a{display:inline-block;padding-block:6px;}
}