/* MBSTECHAI — shared styles */

:root{
  --ink:#101820;
  --ink-2:#3A4752;
  --ink-3:#69767F;
  --blue:#0B5FC4;
  --blue-deep:#062E6F;
  --blue-soft:#E8F0FB;
  --green:#6FA81E;
  --green-soft:#EDF5DF;
  --paper:#F7F7F7;
  --white:#FFFFFF;
  --mist:#E0E6EA;
  --radius:4px;
  --maxw:1140px;
  --pad:24px;
  --font-display:"Space Grotesk","Segoe UI",sans-serif;
  --font-body:"IBM Plex Sans","Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.15;letter-spacing:-.02em;color:var(--ink);margin:0}
h1{font-size:clamp(2.1rem,5vw,3.5rem)}
h2{font-size:clamp(1.6rem,3.2vw,2.35rem)}
h3{font-size:1.15rem;letter-spacing:-.01em}
p{margin:0 0 1rem}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.eyebrow{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--blue);margin:0 0 14px;display:block;
}
.eyebrow--green{color:var(--green)}
.lede{font-size:1.12rem;color:var(--ink-2);max-width:62ch}
.center{text-align:center}
.center .lede{margin-left:auto;margin-right:auto}

/* ---------- signature: pixel dissolve rail ---------- */
.rail{display:flex;align-items:center;gap:5px;height:14px}
.rail i{display:block;width:14px;height:14px;background:var(--blue);border-radius:1px}
.rail i:nth-child(1){opacity:1}
.rail i:nth-child(2){opacity:.92;width:12px;height:12px}
.rail i:nth-child(3){opacity:.8;width:10px;height:10px;background:#2E76C9}
.rail i:nth-child(4){opacity:.66;width:9px;height:9px;background:#4A8B8C}
.rail i:nth-child(5){opacity:.5;width:7px;height:7px;background:var(--green)}
.rail i:nth-child(6){opacity:.34;width:6px;height:6px;background:var(--green)}
.rail i:nth-child(7){opacity:.2;width:4px;height:4px;background:var(--green)}
.rail i:nth-child(8){opacity:.1;width:3px;height:3px;background:var(--green)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:40;background:rgba(247,247,247,.92);
  backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--mist);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:74px}
.brand{display:flex;align-items:center}
.brand img{height:38px;width:auto}
.nav{display:flex;align-items:center;gap:26px;flex-wrap:nowrap}
.nav a{
  white-space:nowrap;font-size:.95rem;color:var(--ink-2);text-decoration:none;padding:6px 0;
  border-bottom:2px solid transparent;
}
.nav a:hover{color:var(--ink);border-bottom-color:var(--green);text-decoration:none}
.nav a.is-active{color:var(--ink);border-bottom-color:var(--blue)}
.nav a.nav-cta{
  background:var(--ink);color:var(--white);padding:11px 20px;border-radius:var(--radius);
  font-size:.92rem;border-bottom:none !important;white-space:nowrap;flex:0 0 auto;
}
.nav a.nav-cta:hover{background:var(--blue-deep);color:var(--white);text-decoration:none;border-bottom-color:transparent}
.burger{
  display:none;background:none;border:1px solid var(--mist);border-radius:var(--radius);
  width:44px;height:40px;cursor:pointer;padding:0;align-items:center;justify-content:center;
}
.burger span{display:block;width:20px;height:2px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--ink)}
.burger span::before{top:-6px}
.burger span::after{top:6px}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;font-family:var(--font-body);font-size:.98rem;
  padding:13px 26px;border-radius:var(--radius);border:1px solid transparent;
  cursor:pointer;text-decoration:none;transition:background .15s ease,color .15s ease;
}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--blue);color:var(--white)}
.btn-primary:hover{background:var(--blue-deep);color:var(--white)}
.btn-dark{background:var(--ink);color:var(--white)}
.btn-dark:hover{background:var(--blue-deep);color:var(--white)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--white)}
.btn-light{background:var(--white);color:var(--ink)}
.btn-light:hover{background:var(--green);color:var(--white)}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ---------- sections ---------- */
.section{padding:82px 0}
.section--tight{padding:58px 0}
.section--white{background:var(--white);border-top:1px solid var(--mist);border-bottom:1px solid var(--mist)}
.section--ink{background:var(--ink);color:#D7DEE4}
.section--ink h2,.section--ink h3{color:var(--white)}
.section--ink .lede{color:#AEBAC4}
.section-head{max-width:64ch;margin-bottom:44px}

/* ---------- hero ---------- */
.hero{padding:76px 0 68px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{margin-bottom:20px}
.hero .lede{font-size:1.18rem}
.hero-rail{margin-bottom:26px}

/* dissolve panel — the signature visual */
.dissolve{
  background:var(--white);border:1px solid var(--mist);border-radius:var(--radius);
  padding:26px;box-shadow:0 18px 44px -30px rgba(16,24,32,.5);
}
.dissolve-label{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-3);display:flex;justify-content:space-between;margin-bottom:16px;
}
.task{
  display:flex;align-items:center;gap:12px;padding:12px 14px;margin-bottom:9px;
  border:1px solid var(--mist);border-radius:var(--radius);font-size:.93rem;color:var(--ink-2);
  background:var(--paper);
}
.task b{
  font-family:var(--font-mono);font-weight:500;font-size:.72rem;color:var(--ink-3);
  min-width:44px;
}
.task.is-done{background:var(--green-soft);border-color:#CFE3A8;color:var(--ink)}
.task.is-done b{color:var(--green)}
.dissolve-foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--mist);
  font-family:var(--font-mono);font-size:.74rem;color:var(--ink-3);
}
.dissolve-foot strong{color:var(--green);font-weight:600}

/* ---------- cards ---------- */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--white);border:1px solid var(--mist);border-radius:var(--radius);
  padding:28px;position:relative;
}
.card h3{margin-bottom:10px}
.card p{color:var(--ink-2);font-size:.97rem;margin-bottom:0}
.card-tag{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-3);display:block;margin-bottom:14px;
}
.card--accent{border-top:3px solid var(--blue)}
.card--accent-green{border-top:3px solid var(--green)}
.card ul{margin:14px 0 0;padding-left:18px;color:var(--ink-2);font-size:.95rem}
.card ul li{margin-bottom:6px}

.section--ink .card{background:#1A242E;border-color:#2B3944}
.section--ink .card p{color:#AEBAC4}
.section--ink .card-tag{color:#7F8D98}

/* ---------- steps (real sequence) ---------- */
.steps{counter-reset:step;display:grid;gap:0;border-top:1px solid var(--mist)}
.step{
  display:grid;grid-template-columns:78px 1fr;gap:24px;
  padding:26px 0;border-bottom:1px solid var(--mist);align-items:start;
}
.step-n{
  counter-increment:step;font-family:var(--font-mono);font-size:.78rem;color:var(--blue);
  letter-spacing:.1em;padding-top:4px;
}
.step-n::before{content:"0" counter(step)}
.step h3{margin-bottom:6px}
.step p{color:var(--ink-2);margin-bottom:0;font-size:.97rem}
.section--ink .steps,.section--ink .step{border-color:#2B3944}
.section--ink .step p{color:#AEBAC4}
.section--ink .step-n{color:var(--green)}

/* ---------- feature rows ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.stat-line{
  display:flex;flex-wrap:wrap;gap:36px;margin-top:30px;padding-top:26px;border-top:1px solid var(--mist);
}
.stat b{display:block;font-family:var(--font-display);font-size:1.7rem;color:var(--ink)}
.stat span{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink);color:var(--white);padding:66px 0}
.section--ink + .cta-band{border-top:1px solid #2B3944}
.cta-band h2{color:var(--white);margin-bottom:12px}
.cta-band p{color:#AEBAC4;max-width:56ch}
.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:40px;flex-wrap:wrap}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.field{margin-bottom:18px}
.field label{
  display:block;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:7px;
}
.field input,.field select,.field textarea{
  width:100%;padding:13px 14px;border:1px solid var(--mist);border-radius:var(--radius);
  font-family:var(--font-body);font-size:1rem;background:var(--white);color:var(--ink);
}
.field textarea{min-height:140px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px var(--blue-soft)}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-note{font-size:.85rem;color:var(--ink-3);margin-top:14px}
.alert{padding:14px 16px;border-radius:var(--radius);margin-bottom:22px;font-size:.95rem}
.alert-ok{background:var(--green-soft);border:1px solid #CFE3A8;color:#3D5F0C}
.alert-err{background:#FDECEC;border:1px solid #F3C6C6;color:#8B2020}

.info-list{list-style:none;margin:0;padding:0}
.info-list li{padding:18px 0;border-bottom:1px solid var(--mist)}
.info-list li:first-child{padding-top:0}
.info-list span{
  display:block;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:5px;
}
.info-list strong{font-weight:500;font-size:1.02rem}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#93A2AD;padding:58px 0 26px;font-size:.93rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:44px}
.site-footer img{height:36px;width:auto;margin-bottom:18px}
.site-footer h4{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--white);font-weight:500;margin-bottom:16px;
}
.site-footer a{color:#93A2AD;text-decoration:none}
.site-footer a:hover{color:var(--white);text-decoration:none}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer ul li{margin-bottom:9px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid #2B3944;
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:.85rem;color:#6E7D88;
}

/* ---------- reveal ---------- */
.js .reveal{opacity:0;transform:translateY(14px)}
.js .reveal.is-in{opacity:1;transform:none;transition:opacity .55s ease,transform .55s ease}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero-grid,.split,.contact-grid{grid-template-columns:1fr;gap:38px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  body{font-size:16px}
  .section{padding:58px 0}
  .burger{display:flex}
  .nav{
    position:absolute;top:74px;left:0;right:0;background:var(--white);
    border-bottom:1px solid var(--mist);flex-direction:column;align-items:stretch;
    gap:0;padding:8px 24px 20px;display:none;
  }
  .nav.is-open{display:flex}
  .nav a{padding:13px 0;border-bottom:1px solid var(--mist)}
  .nav a.is-active{border-bottom-color:var(--mist)}
  .nav a.nav-cta{text-align:center;margin-top:14px;border-bottom:none}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .step{grid-template-columns:1fr;gap:6px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  *{animation:none !important}
}