/* ==========================================================================
   Digistan Consultant — Core stylesheet
   Phase 0: tokens, layout, header, mega menu, mobile nav, footer
   Hand-authored. No build step required.
   ========================================================================== */

/* --- 1. Design tokens --------------------------------------------------- */
:root{
  --ds-orange:#F04E23;
  --ds-orange-dark:#D33F17;
  --ds-ember:#FF8A4C;
  --ds-orange-tint:#FFF1EC;

  --ds-ink:#0A1522;
  --ds-ink-soft:#12202F;
  --ds-slate:#1E3346;
  --ds-steel:#33475F;
  --ds-mist:#93A4B8;

  --ds-charcoal:#111827;
  --ds-body:#3F4A57;
  --ds-muted:#6B7686;
  --ds-line:#E4E7EC;
  --ds-paper:#F7F8FA;
  --ds-white:#FFFFFF;

  --font-display:"Sora","Segoe UI",system-ui,-apple-system,sans-serif;
  --font-body:"Inter","Segoe UI",system-ui,-apple-system,sans-serif;

  --step--1:0.8125rem;
  --step-0:1.0625rem;
  --step-1:1.25rem;
  --step-2:1.5rem;
  --step-3:1.875rem;
  --step-4:2.25rem;
  --step-5:3rem;
  --step-6:3.75rem;

  --sp-1:0.5rem; --sp-2:1rem; --sp-3:1.5rem; --sp-4:2rem;
  --sp-5:3rem;   --sp-6:4rem; --sp-7:6rem;

  --container:1400px;
  --content:1200px;
  --radius:8px;
  --radius-lg:14px;
  --header-h:84px;
  --header-h-mobile:60px;
  --ease:cubic-bezier(.16,1,.3,1);
  --shadow-mega:0 24px 60px -12px rgba(10,21,34,.18),0 2px 8px rgba(10,21,34,.06);
}

/* --- 2. Reset ----------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 20px)}
body{
  font-family:var(--font-body);
  font-size:var(--step-0);
  line-height:1.7;
  color:var(--ds-body);
  background:var(--ds-white);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{list-style:none}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  color:var(--ds-charcoal);
  font-weight:600;
  line-height:1.18;
  letter-spacing:-.02em;
}
h1{font-size:clamp(2.25rem,5vw,3.75rem)}
h2{font-size:clamp(1.75rem,3.6vw,2.75rem)}
h3{font-size:clamp(1.3rem,2.4vw,1.75rem)}
h4{font-size:var(--step-1)}
p{max-width:68ch}

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

.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:var(--sp-2);z-index:2000;
  background:var(--ds-orange);color:#fff;padding:.75rem 1.25rem;
  border-radius:0 0 var(--radius) var(--radius);font-weight:600;
}
.skip-link:focus{top:0}

/* --- 3. Layout ---------------------------------------------------------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(1rem,4vw,2.5rem)}
.content{width:100%;max-width:var(--content);margin-inline:auto;padding-inline:clamp(1rem,4vw,2.5rem)}
.section{padding-block:clamp(3rem,7vw,6rem)}
.section--dark{background:var(--ds-ink);color:var(--ds-mist)}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:#F5F7FA}
.section--paper{background:var(--ds-paper)}

.eyebrow{
  font-family:var(--font-display);font-size:var(--step--1);font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ds-orange);
  display:block;margin-bottom:var(--sp-1);
}

/* --- 4. Buttons --------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:48px;padding:.75rem 1.5rem;border-radius:var(--radius);
  font-family:var(--font-display);font-size:.95rem;font-weight:600;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  text-align:center;
}
.btn--primary{background:var(--ds-orange);color:#fff}
.btn--primary:hover{background:var(--ds-orange-dark)}
.btn--ghost{border:1px solid var(--ds-line);color:var(--ds-charcoal)}
.btn--ghost:hover{border-color:var(--ds-orange);color:var(--ds-orange)}
.btn--onDark{border:1px solid var(--ds-steel);color:#F5F7FA}
.btn--onDark:hover{border-color:var(--ds-orange);color:var(--ds-orange)}
.btn--sm{min-height:40px;padding:.5rem 1.1rem;font-size:.875rem}

/* --- 5. Header ---------------------------------------------------------- */
.site-header{
  position:sticky;top:0;z-index:1000;background:var(--ds-white);
  border-bottom:1px solid var(--ds-line);
}
.header-bar{
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);
  height:var(--header-h);
}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand img{width:auto;height:34px}

.nav-desktop{display:flex;align-items:center;gap:clamp(.35rem,1vw,1rem);flex:1;justify-content:center}
.nav-item{position:relative}
.nav-link{
  display:flex;align-items:center;gap:.3rem;
  padding:.6rem .55rem;border-radius:var(--radius);
  font-family:var(--font-display);font-size:.875rem;font-weight:600;
  letter-spacing:.02em;text-transform:uppercase;color:var(--ds-charcoal);
  white-space:nowrap;transition:color .18s var(--ease);
}
.nav-link:hover,.nav-item[data-open="true"] > .nav-link,.nav-link[aria-current="page"]{color:var(--ds-orange)}
.nav-link .chev{width:11px;height:11px;transition:transform .22s var(--ease);flex-shrink:0}
.nav-item[data-open="true"] .chev{transform:rotate(180deg)}

.header-actions{display:flex;align-items:center;gap:.75rem;flex-shrink:0}
.header-phone{
  display:flex;align-items:center;gap:.4rem;font-family:var(--font-display);
  font-size:.875rem;font-weight:600;color:var(--ds-charcoal);white-space:nowrap;
}
.header-phone:hover{color:var(--ds-orange)}
.header-phone svg{width:16px;height:16px}

/* --- 6. Mega menu ------------------------------------------------------- */
.mega{
  position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(-8px);
  background:var(--ds-white);border:1px solid var(--ds-line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-mega);padding:var(--sp-4);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .2s var(--ease),transform .24s var(--ease),visibility .2s;
}
.nav-item[data-open="true"] > .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.mega--wide{width:min(1240px,calc(100vw - 3rem))}
.mega--narrow{width:min(560px,calc(100vw - 3rem));left:0;transform:translateY(-8px)}
.nav-item[data-open="true"] > .mega--narrow{transform:translateY(0)}

.mega-row + .mega-row{margin-top:var(--sp-3);padding-top:var(--sp-3);border-top:1px solid var(--ds-line)}
.mega-row-title{
  font-family:var(--font-display);font-size:var(--step--1);font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ds-muted);
  margin-bottom:var(--sp-2);
}
.mega-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--sp-3) var(--sp-4)}
.mega-col-head{
  font-family:var(--font-display);font-size:1rem;font-weight:600;color:var(--ds-orange);
  padding-bottom:.6rem;margin-bottom:.5rem;border-bottom:1px solid var(--ds-line);
  display:block;
}
a.mega-col-head:hover{color:var(--ds-orange-dark)}
.mega-list li a{
  display:block;padding:.4rem 0;font-size:.9375rem;color:var(--ds-body);
  line-height:1.45;transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.mega-list li a:hover{color:var(--ds-orange);padding-left:6px}

.mega-foot{
  margin-top:var(--sp-3);padding-top:var(--sp-3);border-top:1px solid var(--ds-line);
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-2);flex-wrap:wrap;
}
.mega-foot p{font-size:.9375rem;color:var(--ds-muted);margin:0}

/* --- 7. Mobile navigation ----------------------------------------------- */
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:var(--radius);color:var(--ds-charcoal);
}
.nav-toggle svg{width:24px;height:24px}
.mobile-nav{
  position:fixed;inset:var(--header-h-mobile) 0 0;z-index:999;
  background:var(--ds-white);overflow-y:auto;overscroll-behavior:contain;
  padding:var(--sp-2) 0 8rem;
  transform:translateX(100%);visibility:hidden;
  transition:transform .3s var(--ease),visibility .3s;
}
.mobile-nav[data-open="true"]{transform:translateX(0);visibility:visible}
.m-item{border-bottom:1px solid var(--ds-line)}
.m-trigger,.m-link{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  padding:1rem clamp(1rem,4vw,2rem);min-height:56px;
  font-family:var(--font-display);font-weight:600;font-size:1rem;color:var(--ds-charcoal);
  text-align:left;
}
.m-trigger .chev{width:14px;height:14px;transition:transform .22s var(--ease);color:var(--ds-muted)}
.m-item[data-open="true"] > .m-trigger{color:var(--ds-orange)}
.m-item[data-open="true"] > .m-trigger .chev{transform:rotate(180deg)}
.m-panel{display:none;padding:0 clamp(1rem,4vw,2rem) 1rem;background:var(--ds-paper)}
.m-item[data-open="true"] > .m-panel{display:block}
.m-group-head{
  font-family:var(--font-display);font-size:.8125rem;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;color:var(--ds-orange);
  padding:1rem 0 .35rem;
}
.m-panel li a{display:block;padding:.6rem 0;font-size:.9375rem;color:var(--ds-body);min-height:44px}
.m-cta{padding:var(--sp-3) clamp(1rem,4vw,2rem);display:grid;gap:.75rem}

.mobile-bar{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:998;
  background:var(--ds-white);border-top:1px solid var(--ds-line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-bar ul{display:grid;grid-template-columns:repeat(3,1fr)}
.mobile-bar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.2rem;
  padding:.6rem .25rem;min-height:60px;font-size:.75rem;font-weight:600;
  font-family:var(--font-display);color:var(--ds-charcoal);
}
.mobile-bar a svg{width:20px;height:20px}
.mobile-bar li + li{border-left:1px solid var(--ds-line)}
.mobile-bar a.is-accent{color:var(--ds-orange)}

/* --- 8. Footer ---------------------------------------------------------- */
.site-footer{background:var(--ds-ink);color:var(--ds-mist);padding-block:var(--sp-6) var(--sp-3)}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:var(--sp-4)}
.footer-brand img{height:32px;margin-bottom:var(--sp-2)}
.footer-brand p{font-size:.9375rem;max-width:34ch}
.footer-head{
  font-family:var(--font-display);font-size:.8125rem;font-weight:600;
  letter-spacing:.13em;text-transform:uppercase;color:#F5F7FA;margin-bottom:var(--sp-2);
}
.footer-list li a{display:block;padding:.3rem 0;font-size:.9375rem;color:var(--ds-mist)}
.footer-list li a:hover{color:var(--ds-ember)}
.footer-contact{font-size:.9375rem;display:grid;gap:.6rem}
.footer-contact a:hover{color:var(--ds-ember)}
.footer-social{display:flex;gap:.6rem;margin-top:var(--sp-2)}
.footer-social a{
  display:flex;align-items:center;justify-content:center;width:40px;height:40px;
  border:1px solid var(--ds-slate);border-radius:var(--radius);color:var(--ds-mist);
}
.footer-social a:hover{border-color:var(--ds-orange);color:var(--ds-orange)}
.footer-social svg{width:18px;height:18px}
.footer-bottom{
  margin-top:var(--sp-5);padding-top:var(--sp-3);border-top:1px solid var(--ds-slate);
  display:flex;justify-content:space-between;gap:var(--sp-2);flex-wrap:wrap;font-size:.875rem;
}
.footer-legal{display:flex;flex-wrap:wrap;gap:.35rem 1rem}
.footer-legal a:hover{color:var(--ds-ember)}

/* --- 9. Responsive ------------------------------------------------------ */
@media (max-width:1180px){
  .nav-desktop{display:none}
  .nav-toggle{display:flex}
  .header-bar{height:var(--header-h-mobile)}
  .brand img{height:28px}
  .header-phone span{display:none}
  .header-actions .btn{display:none}
  .mobile-bar{display:block}
  body{padding-bottom:60px}
  :root{--header-h:60px}
}
@media (max-width:900px){
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}
@media print{
  .site-header,.mobile-bar,.mobile-nav,.site-footer{display:none}
}