/* ============================================================
   cqrt(ai) — Secure AI. Confident Business.
   Design system
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  /* brand */
  --black:      #080B0A;
  --ink:        #0C1110;   /* dark section bg */
  --ink-2:      #131A18;   /* dark card bg */
  --ink-3:      #1B2421;   /* dark hairline / raised */
  --paper:      #FFFFFF;
  --paper-2:    #F4F6F3;   /* light alt section */
  --paper-3:    #ECEFEA;   /* light card / hairline fill */

  --green:      #25D366;
  --green-600:  #18BD57;
  --green-700:  #0C8C40;   /* green text on light */
  --green-glow: rgba(37,211,102,.35);

  --purple:     #6E6080;
  --purple-200: #B7AEC4;
  --purple-700: #4A405A;

  /* text */
  --t-strong:   #0B100F;   /* near-black heading on light */
  --t-body:     #3A4240;   /* body on light */
  --t-muted:    #6B7672;   /* muted on light */
  --t-on-dark:  #EDF2EF;   /* heading on dark */
  --t-on-dark-2:#A9B6B0;   /* body on dark */
  --t-on-dark-3:#6E7C77;   /* muted on dark */

  /* lines */
  --line:       #E2E6E0;
  --line-2:     #D2D8D0;
  --line-dark:  rgba(255,255,255,.09);
  --line-dark-2:rgba(255,255,255,.16);

  /* type */
  --display: 'Space Grotesk', sans-serif;
  --sans: 'IBM Plex Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  --maxw: 1180px;
  --pad: clamp(20px, 5vw, 80px);
  --radius: 14px;
  --radius-lg: 22px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body{
  margin:0;
  font-family: var(--sans);
  color: var(--t-body);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
::selection{ background: var(--green); color:#062a13; }

/* ---------- layout ---------- */
.wrap{ max-width: var(--maxw); margin:0 auto; padding-inline: var(--pad); }
section{ position: relative; }
.sect{ padding-block: clamp(72px, 9vw, 132px); }
.sect-tight{ padding-block: clamp(56px, 7vw, 96px); }

.dark{ background: var(--ink); color: var(--t-on-dark); }
.dark h1,.dark h2,.dark h3,.dark h4{ color: var(--t-on-dark); }
.alt{ background: var(--paper-2); }

/* ---------- type ---------- */
h1,h2,h3,h4{ font-family: var(--display); color: var(--t-strong); margin:0; line-height:1.04; letter-spacing:-.02em; font-weight:600; }
h1{ font-size: clamp(2.6rem, 6vw, 4.6rem); }
h2{ font-size: clamp(2rem, 4.2vw, 3.3rem); }
h3{ font-size: clamp(1.3rem, 2.2vw, 1.7rem); letter-spacing:-.01em; }
p{ margin:0; }
.lead{ font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height:1.55; color: var(--t-body); }
.dark .lead{ color: var(--t-on-dark-2); }

.eyebrow{
  font-family: var(--mono);
  font-size: .8rem;
  font-weight:500;
  letter-spacing:.22em;
  text-transform: uppercase;
  color: var(--green-700);
  display:inline-flex; align-items:center; gap:.6em;
}
.dark .eyebrow{ color: var(--green); }
.eyebrow::before{
  content:""; width:22px; height:1px; background: currentColor; opacity:.6;
}
.eyebrow.no-rule::before{ display:none; }

.section-head{ max-width: 760px; }
.section-head .eyebrow{ margin-bottom: 20px; }
.section-head p.lead{ margin-top: 22px; }

.mono{ font-family: var(--mono); }
.green-text{ color: var(--green-700); }
.dark .green-text{ color: var(--green); }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.6em;
  font-family: var(--sans); font-weight:600; font-size: .98rem;
  padding: 14px 24px; border-radius: 999px; border:1px solid transparent;
  cursor:pointer; transition: transform .16s ease, background .16s ease, box-shadow .16s ease, color .16s ease, border-color .16s ease;
  white-space:nowrap;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{ background: var(--green); color:#06240F; box-shadow: 0 1px 0 rgba(0,0,0,.04); }
.btn-primary:hover{ background: var(--green-600); box-shadow: 0 8px 26px -8px var(--green-glow); transform: translateY(-1px); }
.btn-ghost{ background: transparent; border-color: var(--line-2); color: var(--t-strong); }
.btn-ghost:hover{ border-color: var(--t-strong); }
.dark .btn-ghost, .hero .btn-ghost, .cta .btn-ghost{ border-color: var(--line-dark-2); color: var(--t-on-dark); }
.dark .btn-ghost:hover, .hero .btn-ghost:hover, .cta .btn-ghost:hover{ border-color: var(--t-on-dark); background: rgba(255,255,255,.04); }
.btn-lg{ padding: 17px 30px; font-size: 1.05rem; }

.arrow{ transition: transform .16s ease; }
.btn:hover .arrow{ transform: translateX(3px); }

/* ---------- header ---------- */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background .3s ease, border-color .3s ease;
}
.site-header .bar{
  display:flex; align-items:center; justify-content:space-between;
  height: 70px; gap: 20px;
}
.site-header .bar > a{ flex: 0 0 auto; }
.site-header .logo{ height: 26px; width:auto; }
.nav{ display:flex; align-items:center; gap: 30px; min-width:0; }
.nav a.lnk{ font-size:.94rem; color: var(--t-body); font-weight:500; transition: color .15s ease; }
.nav a.lnk:hover{ color: var(--t-strong); }
.nav-actions{ display:flex; align-items:center; gap: 14px; }
.menu-toggle{ display:none; }

/* ---------- generic cards ---------- */
.card{
  background: var(--paper);
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
}
.dark .card{ background: var(--ink-2); border-color: var(--line-dark); }

.grid{ display:grid; gap: 22px; }
.cols-2{ grid-template-columns: repeat(2,1fr); }
.cols-3{ grid-template-columns: repeat(3,1fr); }
.cols-4{ grid-template-columns: repeat(4,1fr); }
.cols-5{ grid-template-columns: repeat(5,1fr); }

/* sparkle bullet */
.spark-list{ list-style:none; margin:0; padding:0; display:grid; gap:14px; }
.spark-list li{ position:relative; padding-left: 30px; line-height:1.45; }
.spark-list li::before{
  content:""; position:absolute; left:0; top:.36em;
  width:15px; height:15px;
  background: var(--green);
  -webkit-mask: var(--star-mask) center/contain no-repeat;
  mask: var(--star-mask) center/contain no-repeat;
}

/* utility */
.muted{ color: var(--t-muted); }
.dark .muted{ color: var(--t-on-dark-3); }
.center{ text-align:center; }
.mx-auto{ margin-inline:auto; }
.divider{ height:1px; background: var(--line); border:0; margin:0; }
.dark .divider{ background: var(--line-dark); }

/* reveal on scroll */
.reveal{ opacity:0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1 !important; transform:none !important; }
  html{ scroll-behavior:auto; }
}

@media (max-width: 1024px){
  .nav .lnk{ display:none; }
  .nav-actions .btn-ghost{ display:none; }
}
@media (max-width: 880px){
  .cols-2,.cols-3,.cols-4,.cols-5{ grid-template-columns: 1fr; }
}