/* ==========================================================================
   Tyagi Tech Consulting — core design system
   Ink + signal amber. Dark by commitment, not by toggle.
   ========================================================================== */

:root{
  /* ink scale */
  --ink-900:#070a0f;
  --ink-850:#0a0e15;
  --ink-800:#0d121b;
  --ink-700:#121926;
  --ink-600:#18202f;
  --ink-500:#1f2937;

  /* text */
  --fg:#e9eef5;
  --fg-strong:#ffffff;
  --fg-muted:#96a3b6;
  --fg-faint:#6b7789;

  /* signal */
  --amber:#e9a13b;
  --amber-bright:#f5b556;
  --amber-dim:rgba(233,161,59,.14);
  --teal:#48c9b8;
  --teal-dim:rgba(72,201,184,.14);

  /* lines */
  --line:rgba(233,238,245,.09);
  --line-strong:rgba(233,238,245,.16);

  /* type */
  --display:'Space Grotesk',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;
  --body:'Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  /* metrics */
  --wrap:1180px;
  --gut:clamp(20px,5vw,48px);
  --r:14px;
  --r-sm:9px;

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

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:90px;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

body{
  margin:0;
  background:var(--ink-900);
  color:var(--fg);
  font-family:var(--body);
  font-size:16.5px;
  line-height:1.65;
  font-feature-settings:'cv02','cv03','cv04','ss01';
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* faint engineering grid behind everything */
body::before{
  content:'';
  position:fixed;
  inset:0;
  z-index:-2;
  background-image:
    linear-gradient(to right,rgba(233,238,245,.028) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(233,238,245,.028) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse 120% 80% at 50% 0%,#000 10%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 120% 80% at 50% 0%,#000 10%,transparent 75%);
  pointer-events:none;
}
body::after{
  content:'';
  position:fixed;
  inset:0;
  z-index:-1;
  background:
    radial-gradient(60rem 40rem at 78% -8%,rgba(233,161,59,.10),transparent 62%),
    radial-gradient(46rem 34rem at 6% 4%,rgba(72,201,184,.07),transparent 60%);
  pointer-events:none;
}

img,svg,video{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}

h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:600;
  line-height:1.1;
  letter-spacing:-.022em;
  margin:0;
  color:var(--fg-strong);
  text-wrap:balance;
}
p{margin:0 0 1em;text-wrap:pretty}
p:last-child{margin-bottom:0}

::selection{background:var(--amber);color:var(--ink-900)}

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

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gut);
}

.skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--amber);color:var(--ink-900);
  padding:12px 20px;border-radius:0 0 var(--r-sm) 0;font-weight:600;
}
.skip:focus{left:0}

/* ---------------------------------------------------------------- type ---- */

.display{
  font-size:clamp(2.35rem,5.6vw,3.6rem);
  letter-spacing:-.035em;
  line-height:1.04;
}
.display em{
  font-style:normal;
  color:var(--amber);
}

.h2{font-size:clamp(1.85rem,4vw,2.85rem);letter-spacing:-.03em}
.h3{font-size:clamp(1.2rem,2.2vw,1.45rem)}

.lead{
  font-size:clamp(1.03rem,1.65vw,1.2rem);
  color:var(--fg-muted);
  line-height:1.72;
  max-width:62ch;
}

.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--mono);
  font-size:.72rem;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
}
.eyebrow::before{
  content:'';
  width:22px;height:1px;
  background:currentColor;
  opacity:.55;
}
.eyebrow--plain::before{display:none}

.muted{color:var(--fg-muted)}
.mono{font-family:var(--mono)}

/* ------------------------------------------------------------- buttons ---- */

.btn{
  --btn-bg:var(--amber);
  --btn-fg:var(--ink-900);
  display:inline-flex;align-items:center;gap:.6em;
  padding:.82em 1.5em;
  background:var(--btn-bg);
  color:var(--btn-fg);
  border:1px solid transparent;
  border-radius:var(--r-sm);
  font-family:var(--display);
  font-weight:600;
  font-size:.95rem;
  letter-spacing:-.01em;
  cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .2s,border-color .2s,color .2s;
  box-shadow:0 1px 0 rgba(255,255,255,.22) inset,0 10px 28px -14px rgba(233,161,59,.85);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 1px 0 rgba(255,255,255,.28) inset,0 16px 34px -14px rgba(233,161,59,.95)}
.btn:active{transform:translateY(0)}
.btn svg{width:1.05em;height:1.05em;flex:none;transition:transform .25s var(--ease)}
.btn:hover svg{transform:translateX(3px)}

.btn--ghost{
  --btn-bg:transparent;
  --btn-fg:var(--fg);
  border-color:var(--line-strong);
  box-shadow:none;
}
.btn--ghost:hover{
  background:rgba(233,238,245,.05);
  border-color:var(--amber);
  color:var(--fg-strong);
  box-shadow:none;
}

/* --------------------------------------------------------------- header --- */

.site-header{
  position:sticky;top:0;z-index:60;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  background:rgba(7,10,15,.72);
  border-bottom:1px solid transparent;
  transition:border-color .3s,background .3s;
}
.site-header.is-stuck{
  border-bottom-color:var(--line);
  background:rgba(7,10,15,.9);
}
.site-header__inner{
  display:flex;align-items:center;gap:clamp(16px,3vw,40px);
  min-height:72px;
}

.brand{display:flex;align-items:center;gap:11px;flex:none;margin-right:auto}
.brand__mark{width:34px;height:34px;flex:none}
.brand__text{display:flex;flex-direction:column;line-height:1.12}
.brand__name{
  font-family:var(--display);font-weight:600;font-size:1.01rem;
  letter-spacing:-.02em;color:var(--fg-strong);white-space:nowrap;
}
.brand__sub{
  font-family:var(--mono);font-size:.58rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--fg-faint);
}

.nav{display:flex;align-items:center;gap:4px}
.nav a{
  position:relative;
  padding:.5em .85em;
  font-size:.92rem;
  white-space:nowrap;
  color:var(--fg-muted);
  border-radius:var(--r-sm);
  transition:color .2s,background .2s;
}
.nav a:hover{color:var(--fg-strong);background:rgba(233,238,245,.05)}
.nav a[aria-current='page']{color:var(--fg-strong)}
.nav a[aria-current='page']::after{
  content:'';position:absolute;left:.85em;right:.85em;bottom:.24em;
  height:1.5px;background:var(--amber);border-radius:2px;
}
/* the in-nav CTA is for the mobile drawer only */
.nav .btn{display:none}
.header-cta{flex:none}
.header-cta .btn{padding:.62em 1.15em;font-size:.88rem}

.nav-toggle{
  display:none;
  width:42px;height:42px;
  align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line-strong);
  border-radius:var(--r-sm);cursor:pointer;flex:none;
}
.nav-toggle svg{width:20px;height:20px}
.nav-toggle .x{display:none}
.nav-toggle[aria-expanded='true'] .x{display:block}
.nav-toggle[aria-expanded='true'] .bars{display:none}

@media (max-width:1080px) and (min-width:901px){
  .nav a{padding:.5em .6em;font-size:.88rem}
  .header-cta .btn{padding:.58em .95em;font-size:.84rem}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .header-cta{display:none}
  .nav{
    position:fixed;inset:72px 0 auto;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--ink-850);
    border-bottom:1px solid var(--line);
    padding:12px var(--gut) 26px;
    transform:translateY(-130%);
    transition:transform .4s var(--ease);
    max-height:calc(100dvh - 72px);
    overflow-y:auto;
  }
  .nav.is-open{transform:translateY(0)}
  .nav a{padding:.85em .2em;font-size:1.05rem;border-bottom:1px solid var(--line)}
  .nav a[aria-current='page']::after{display:none}
  .nav a[aria-current='page']{color:var(--amber)}
  .nav .btn{display:inline-flex;margin-top:18px;justify-content:center}
}

/* -------------------------------------------------------------- footer ---- */

.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(to bottom,transparent,rgba(13,18,27,.75));
  margin-top:clamp(72px,10vw,130px);
  padding-block:clamp(52px,7vw,76px) 30px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.55fr repeat(3,1fr);
  gap:clamp(28px,4vw,54px);
}
@media (max-width:860px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr}}

.footer-about p{color:var(--fg-muted);font-size:.93rem;max-width:36ch;margin-top:16px}
.footer-col h4{
  font-family:var(--mono);font-size:.7rem;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--fg-faint);
  margin-bottom:15px;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-col a{color:var(--fg-muted);font-size:.93rem;transition:color .2s}
.footer-col a:hover{color:var(--amber)}

.footer-bottom{
  display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center;
  justify-content:space-between;
  margin-top:clamp(40px,5vw,60px);
  padding-top:24px;
  border-top:1px solid var(--line);
  font-size:.82rem;color:var(--fg-faint);
}
.footer-bottom .mono{font-size:.76rem;letter-spacing:.04em}
.footer-legal{display:flex;gap:20px;flex-wrap:wrap}
.footer-legal a:hover{color:var(--amber)}

/* -------------------------------------------------------------- section --- */

.section{padding-block:clamp(64px,9vw,118px)}
.section--tight{padding-block:clamp(48px,6vw,76px)}

.section-head{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.85fr);
  gap:clamp(20px,4vw,64px);
  align-items:end;
  margin-bottom:clamp(36px,5vw,60px);
}
@media (max-width:820px){.section-head{grid-template-columns:1fr;align-items:start;gap:18px}}
.section-head h2{margin-top:14px}
.section-head__aside{color:var(--fg-muted);font-size:.97rem;padding-bottom:.35em}

.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------------------------------------------------------------- cards --- */

.panel{
  background:linear-gradient(160deg,rgba(24,32,47,.9),rgba(13,18,27,.85));
  border:1px solid var(--line);
  border-radius:var(--r);
}

/* -------------------------------------------------------------- reveal ---- */

.reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .75s var(--ease),transform .75s var(--ease);
  transition-delay:calc(var(--d,0) * 80ms);
}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
}

/* ------------------------------------------------------------ utilities --- */

.center{text-align:center}
.stack-sm > * + *{margin-top:12px}
.nowrap{white-space:nowrap}
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}