/* Aiveris static site styles
   Brand guidance: outcome-first, sober, secure-by-design.
   Palette inspired by Brand Kit v2 (hero gradient etc.)
*/

:root{
  --bg: #FFFBF5;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;

  --navy-900:#0D1B2A;
  --navy-800:#1B2838;
  --navy-700:#1E3A5F;

  --blue:#3B82F6;
  --teal:#34D399;
  --violet:#8B5CF6; /* accent only */

  --shadow-1: 0 1px 2px rgba(27,40,56, 0.05);
  --shadow-2: 0 4px 8px rgba(27,40,56, 0.08);
  --shadow-3: 0 8px 16px rgba(27,40,56, 0.12);

  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 16px;
  --r-pill: 9999px;

  --container: 1100px;
  --gutter: 20px;

  --t-fast: 150ms;
  --t: 200ms;
  --t-slow: 250ms;
  --ease: ease-in-out;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important; animation:none !important;}
}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background: linear-gradient(to bottom, var(--bg), #f1f5f9);
  line-height:1.55;
}
img{max-width:100%; height:auto;}
a{color:inherit;}

.skip-link{
  position:absolute; left:-999px; top:8px;
  background:var(--surface);
  border:1px solid var(--border);
  padding:10px 12px;
  border-radius:var(--r-md);
  box-shadow:var(--shadow-2);
  z-index:1000;
}
.skip-link:focus{left:8px;}

.container{max-width:var(--container); margin:0 auto; padding:0 var(--gutter);}

/* Header */
.site-header{
  position:sticky; top:0; z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(255, 251, 245, 0.8);
  border-bottom:1px solid rgba(226,232,240,0.7);
}
.header-inner{display:flex; align-items:center; justify-content:space-between; gap:16px; padding:14px 0;}
.brand{
  display:flex; align-items:center; gap:10px;
  text-decoration:none;
}
.brand-mark{width:28px; height:28px; display:block;}
.brand-name{
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  letter-spacing: 0.18em;
  font-weight: 600;
  font-size: 14px;
}

.nav-toggle{
  display:none;
  background:transparent;
  border:1px solid var(--border);
  border-radius:var(--r-md);
  padding:10px 12px;
}
.nav-toggle:focus-visible{outline:3px solid rgba(59,130,246,0.4); outline-offset:2px;}

.site-nav ul{
  list-style:none;
  display:flex;
  gap:14px;
  padding:0; margin:0;
  align-items:center;
}
.site-nav a{
  text-decoration:none;
  color:var(--muted);
  font-weight:600;
  font-size:14px;
  padding:8px 10px;
  border-radius:10px;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}
.site-nav a[aria-current="page"]{color:var(--text); background: rgba(15,23,42,0.06);}
.site-nav a:hover{color:var(--text); background: rgba(15,23,42,0.06);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  border-radius: var(--r-pill);
  padding: 10px 14px;
  font-weight: 700;
  font-size: 14px;
  border:1px solid transparent;
  text-decoration:none;
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease), background var(--t) var(--ease);
}
.btn:focus-visible{outline:3px solid rgba(59,130,246,0.4); outline-offset:2px;}
.btn-primary{
  color:white;
  background: linear-gradient(90deg, var(--blue), var(--teal));
  box-shadow: var(--shadow-2);
}
.btn-primary:hover{transform: translateY(-1px); box-shadow: var(--shadow-3);}
.btn-secondary{
  background: rgba(255,255,255,0.75);
  border-color: rgba(226,232,240,0.9);
  color: var(--text);
}
.btn-secondary:hover{transform: translateY(-1px); box-shadow: var(--shadow-2);}

/* Hero */
.hero{
  background: radial-gradient(900px 500px at 20% 0%, rgba(59,130,246,0.18), transparent 60%),
              radial-gradient(900px 500px at 80% 30%, rgba(52,211,153,0.14), transparent 65%),
              linear-gradient(to bottom right, var(--navy-900), var(--navy-800), var(--navy-700));
  color: rgba(255,255,255,0.92);
  padding: 72px 0 54px;
}
.hero .kicker{
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  letter-spacing:0.22em;
  font-size:12px;
  opacity:0.8;
  margin:0 0 10px;
}
.hero h1{font-size: clamp(36px, 4vw, 54px); line-height:1.05; margin:0 0 14px; color:white;}
.hero p{margin:0 0 24px; max-width: 60ch; color: rgba(255,255,255,0.78);}
.hero-actions{display:flex; gap:12px; flex-wrap:wrap; align-items:center;}

.section{padding: 54px 0;}
.section h2{font-size: 28px; margin:0 0 10px;}
.section .subhead{color:var(--muted); margin:0 0 22px;}

.grid{display:grid; gap:16px;}
.grid.cols-3{grid-template-columns: repeat(3, minmax(0, 1fr));}
.grid.cols-4{grid-template-columns: repeat(4, minmax(0, 1fr));}
@media (max-width: 900px){
  .grid.cols-3{grid-template-columns:1fr;}
  .grid.cols-4{grid-template-columns:1fr 1fr;}
}
@media (max-width: 640px){
  .grid.cols-4{grid-template-columns:1fr;}
}

.card{
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(226,232,240,0.9);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-1);
  padding: 18px;
}
.card h3{margin: 0 0 8px; font-size:16px;}
.card p{margin:0; color:var(--muted); font-size:14px;}
.card .meta{margin-top:12px; font-size: 12px; color: #64748b; display:flex; gap:8px; align-items:center;}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 6px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(226,232,240,0.9);
  background: rgba(255,255,255,0.78);
  color: #334155;
  font-size: 12px;
  font-weight: 700;
}

.testimonial{position:relative;}
.testimonial blockquote{margin:0; color:var(--text); font-weight:650;}
.testimonial .quote-meta{margin-top:12px; color:#64748b; font-size:12px;}

.inline-link{color: var(--blue); text-decoration: none; font-weight:700;}
.inline-link:hover{text-decoration: underline;}

/* CTA band */
.cta-band{
  padding: 54px 0;
  background: linear-gradient(to right, var(--navy-800), var(--navy-900));
  color: rgba(255,255,255,0.90);
}
.cta-inner{display:flex; align-items:center; justify-content:space-between; gap:18px; flex-wrap:wrap;}
.cta-band h2{margin:0; color:white;}
.cta-band p{margin:6px 0 0; color: rgba(255,255,255,0.72); max-width: 70ch;}

/* Forms */
label{display:block; font-weight:700; font-size:14px; margin: 0 0 6px;}
input, textarea, select{
  width:100%;
  padding: 11px 12px;
  border-radius: 12px;
  border:1px solid rgba(226,232,240,0.95);
  background: rgba(255,255,255,0.9);
  font: inherit;
  color: var(--text);
}
input:focus, textarea:focus, select:focus{outline:3px solid rgba(59,130,246,0.35); border-color: rgba(59,130,246,0.6);}
.field{margin-bottom:14px;}
.form-note{color: #64748b; font-size: 13px;}

/* Footer */
.site-footer{
  background: linear-gradient(to bottom, #0b1521, #0a111a);
  color: rgba(255,255,255,0.78);
  padding: 44px 0 28px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-grid{display:grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 22px;}
@media (max-width: 900px){.footer-grid{grid-template-columns:1fr;}}
.site-footer a{color: rgba(255,255,255,0.78); text-decoration:none;}
.site-footer a:hover{color: white; text-decoration: underline;}
.footer-title{font-family:"IBM Plex Mono", ui-monospace, monospace; letter-spacing:0.18em; font-size: 13px; margin:0 0 12px; color: rgba(255,255,255,0.9);}
.footer-small{margin-top: 22px; color: rgba(255,255,255,0.55); font-size: 12px;}

/* Utilities */
.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;}
.hr{height:1px; background: rgba(226,232,240,0.9); border:0; margin: 18px 0;}

/* Mobile nav */
@media (max-width: 860px){
  .nav-toggle{display:inline-flex; align-items:center; gap:8px;}
  .site-nav{display:none;}
  .site-nav[data-open="true"]{display:block;}
  .site-nav ul{flex-direction:column; align-items:stretch; padding: 10px 0 14px;}
  .site-nav a{padding:10px 12px;}
  .header-inner{align-items:flex-start;}
}