/* ════════════════════════════════════════════════════════════════
   MT-IAS Pro — mtias.com shared design system
   Graphite theme matching the software. No dependencies.
   ════════════════════════════════════════════════════════════════ */
:root{
  --bg:#1c1d21; --bg2:#232428; --bg3:#17181c;
  --card1:#383a42; --card2:#2a2b32;
  --border:#4a4d58; --border-soft:rgba(74,77,88,.45);
  --text:#eef0f4; --muted:#969ca8; --dim:#838896;
  --cyan:#38bdf8; --amber:#f5c842; --green:#4ade80;
  --gold1:#fcd660; --gold2:#d49c1c;
  --ease-out:cubic-bezier(.22,1,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:"Segoe UI",-apple-system,BlinkMacSystemFont,Roboto,Arial,sans-serif;
     line-height:1.6;overflow-x:hidden}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
::selection{background:rgba(56,189,248,.28)}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:820px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:0;background:var(--cyan);color:#06232f;padding:8px 16px;border-radius:0 0 8px 0;font-weight:600;z-index:99}
.skip:focus{left:0}

/* ── scroll progress ── */
#progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--cyan),var(--amber));box-shadow:0 0 8px rgba(56,189,248,.6)}

/* ── nav ── */
nav.top{position:sticky;top:0;background:rgba(28,29,33,.86);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--border-soft);z-index:50}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:62px}
.nav-links{display:flex;gap:26px;font-size:14.5px}
.nav-links a{color:var(--muted);position:relative;padding:4px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--amber));transition:width .28s var(--ease-out)}
.nav-links a:hover{color:var(--text);text-decoration:none}
.nav-links a:hover::after{width:100%}
.nav-links a[aria-current="page"]{color:var(--text)}
.nav-links a[aria-current="page"]::after{width:100%}
.nav-co{font-size:12.5px;letter-spacing:.16em;color:var(--dim)}
.nav-co b{color:var(--text);font-weight:600}

/* ── lockup ── */
.lockup{display:inline-flex;align-items:center;gap:9px;white-space:nowrap}
.lockup .name{font-weight:700;letter-spacing:.02em;color:#fff}
.chip{display:inline-block;font-size:.52em;font-weight:700;letter-spacing:.08em;
  padding:.28em .6em;border-radius:99px;color:#342608;
  background:linear-gradient(180deg,var(--gold1),var(--gold2));
  box-shadow:0 0 0 1px rgba(255,240,200,.45), 0 2px 8px rgba(245,200,66,.25)}

/* ── page hero (subpages) ── */
.page-hero{position:relative;padding:72px 0 56px;overflow:hidden;
  background:radial-gradient(700px 320px at 78% 0%,rgba(56,189,248,.08),transparent 65%),
             radial-gradient(520px 300px at 8% 100%,rgba(245,200,66,.05),transparent 60%)}
.crumbs{font-size:13px;color:var(--dim);margin-bottom:22px}
.crumbs a{color:var(--dim)}
.crumbs a:hover{color:var(--cyan)}
.crumbs .sep{margin:0 8px;color:var(--border)}
.kicker{font-size:12.5px;font-weight:700;letter-spacing:.24em;color:var(--cyan);text-transform:uppercase}
.page-hero h1{font-size:clamp(34px,4.6vw,52px);line-height:1.1;font-weight:700;letter-spacing:-.015em;margin-top:12px}
.page-hero h1 .grad{background:linear-gradient(120deg,#fff 20%,#96d6f8 65%,var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero .lead{margin-top:16px;font-size:17.5px;color:var(--muted);max-width:700px}
.std-chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.std-chip{font-size:12.5px;font-weight:600;letter-spacing:.06em;color:var(--amber);
  border:1px solid rgba(245,200,66,.35);background:rgba(245,200,66,.07);border-radius:99px;padding:5px 14px}

/* ── sections & type ── */
section{padding:72px 0;position:relative}
section.tight{padding:56px 0}
section.alt{background:var(--bg2);border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft)}
h2{font-size:clamp(26px,3.2vw,34px);margin-top:8px;font-weight:700;letter-spacing:-.01em}
.lead{color:var(--muted);margin-top:12px;max-width:660px;font-size:16.5px}

/* ── reveals ── */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out);transition-delay:var(--rd,0s)}
.rv.on{opacity:1;transform:none}

/* ── buttons ── */
.btn{display:inline-block;padding:13px 26px;border-radius:9px;font-weight:600;font-size:15px;
  transition:transform .18s var(--ease-out), box-shadow .18s}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-p{background:linear-gradient(180deg,#4cc5f9,#1e7fb5);color:#fff;box-shadow:0 4px 18px rgba(56,189,248,.28)}
.btn-p:hover{box-shadow:0 8px 28px rgba(56,189,248,.42)}
.btn-s{background:linear-gradient(180deg,var(--card1),var(--card2));color:var(--text);border:1px solid var(--border)}
.btn-s:hover{border-color:var(--cyan)}

/* ── cards ── */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:38px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:38px}
.card{position:relative;background:linear-gradient(180deg,var(--card1),var(--card2));border:1px solid var(--border);
  border-radius:14px;padding:26px 24px;overflow:hidden;
  transition:transform .22s var(--ease-out), border-color .22s, box-shadow .22s}
.card:hover{transform:translateY(-5px);border-color:rgba(56,189,248,.65);box-shadow:0 14px 38px rgba(0,0,0,.4), 0 0 0 1px rgba(56,189,248,.18), 0 0 34px rgba(56,189,248,.09)}
.card::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(220px circle at var(--mx,50%) var(--my,50%),rgba(56,189,248,.10),transparent 65%)}
.card:hover::after{opacity:1}
.card h3{font-size:17.5px;margin:4px 0 6px;font-weight:650}
.card p{font-size:14px;color:var(--muted)}
.card .std{display:block;margin-top:14px;font-size:12px;letter-spacing:.06em;color:var(--amber)}
a.card{display:block;color:inherit}
a.card:hover{text-decoration:none}
.panel{background:linear-gradient(180deg,var(--card1),var(--card2));border:1px solid var(--border);border-radius:14px;padding:28px 26px}

/* ── feature/step lists ── */
.steps{list-style:none;counter-reset:st;margin-top:30px}
.steps li{position:relative;padding:14px 0 14px 58px;border-bottom:1px solid var(--border-soft);font-size:15px;color:var(--muted)}
.steps li:last-child{border-bottom:0}
.steps li::before{counter-increment:st;content:counter(st,decimal-leading-zero);
  position:absolute;left:0;top:12px;width:40px;text-align:center;
  font-weight:700;font-size:15px;color:var(--cyan);border:1px solid rgba(56,189,248,.3);
  border-radius:9px;padding:3px 0;background:rgba(56,189,248,.06)}
.steps b{color:var(--text);font-weight:600}
.ticks{list-style:none;margin-top:22px}
.ticks li{padding:8px 0 8px 30px;position:relative;font-size:15px;color:var(--muted)}
.ticks li::before{content:"";position:absolute;left:2px;top:14px;width:14px;height:8px;
  border-left:2.5px solid var(--green);border-bottom:2.5px solid var(--green);transform:rotate(-45deg)}
.ticks b{color:var(--text);font-weight:600}

/* ── spec table ── */
.spec{width:100%;border-collapse:collapse;margin-top:30px;font-size:14.5px}
.spec th,.spec td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--border-soft)}
.spec th{color:var(--dim);font-weight:600;font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;white-space:nowrap}
.spec td{color:var(--muted)}
.spec td:first-child{color:var(--text);font-weight:600;white-space:nowrap}
.spec .hl{color:var(--amber)}
.table-scroll{overflow-x:auto}

/* ── screenshot figure frame (matches app window) ── */
.figure{background:var(--bg3);border:1px solid var(--border);border-radius:12px;overflow:hidden;margin-top:38px}
.figure .bar{display:flex;align-items:center;gap:8px;padding:8px 14px;background:linear-gradient(180deg,#2e3038,#26272e);
  border-bottom:1px solid var(--border-soft);font-size:12px;color:var(--muted)}
.figure .bar .dots{display:flex;gap:5px}
.figure .bar .dots i{width:8px;height:8px;border-radius:50%;background:#4a4d58;display:block}
.figure .body{position:relative;aspect-ratio:16/9;background:radial-gradient(circle at 45% 40%,#30323a,#1c1d22 80%)}
.figure .body svg,.figure .body img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.figure figcaption{padding:12px 16px;font-size:13px;color:var(--dim);border-top:1px solid var(--border-soft)}
.ph-note{position:absolute;left:0;right:0;bottom:10px;text-align:center;font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--dim);opacity:.7}

/* ── FAQ ── */
.faq{margin-top:32px}
.faq details{border:1px solid var(--border);border-radius:12px;margin-bottom:12px;
  background:linear-gradient(180deg,var(--card1),var(--card2));overflow:hidden}
.faq summary{cursor:pointer;padding:17px 20px;font-weight:600;font-size:15.5px;list-style:none;position:relative;padding-right:48px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  color:var(--cyan);font-size:22px;font-weight:400;transition:transform .25s}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq details p{padding:0 20px 18px;font-size:14.5px;color:var(--muted)}
.faq details p a{font-weight:600}

/* ── article prose ── */
.prose{margin-top:8px}
.prose>p{margin:18px 0;font-size:16.5px;color:#c6cad3}
.prose h2{margin-top:48px;font-size:26px}
.prose h3{margin-top:34px;font-size:19px;font-weight:650}
.prose ul,.prose ol{margin:18px 0 18px 26px;color:#c6cad3;font-size:16px}
.prose li{margin:8px 0}
.prose b,.prose strong{color:var(--text)}
.prose .formula{background:var(--bg3);border:1px solid var(--border);border-left:3px solid var(--cyan);
  border-radius:10px;padding:16px 20px;margin:22px 0;font-size:16px;color:var(--text);
  font-family:Consolas,"Cascadia Mono",monospace;overflow-x:auto;white-space:nowrap}
.prose .callout{background:rgba(245,200,66,.06);border:1px solid rgba(245,200,66,.3);border-radius:12px;
  padding:16px 20px;margin:22px 0;font-size:15px;color:var(--muted)}
.prose .callout b{color:var(--amber)}
.prose table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
.prose table th,.prose table td{text-align:left;padding:10px 14px;border:1px solid var(--border-soft)}
.prose table th{background:var(--bg3);color:var(--text);font-weight:600}
.prose table td{color:var(--muted)}
.art-meta{display:flex;gap:16px;align-items:center;margin-top:18px;font-size:13px;color:var(--dim);flex-wrap:wrap}
.art-meta .tag{border:1px solid var(--border);border-radius:99px;padding:3px 12px;color:var(--muted);font-size:12px}

/* ── CTA band ── */
.cta-band{background:var(--bg3);border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft);
  background-image:radial-gradient(700px 300px at 50% 0%,rgba(56,189,248,.07),transparent 65%);
  text-align:center;padding:72px 0}
.cta-band h2{font-size:clamp(26px,3.4vw,36px)}
.cta-band p{color:var(--muted);margin-top:12px;font-size:16.5px}
.cta-band .cta{margin-top:30px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ── related links row ── */
.related{margin-top:38px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.related a{display:block;border:1px solid var(--border);border-radius:12px;padding:18px 20px;color:var(--text);
  background:linear-gradient(180deg,var(--card1),var(--card2));transition:border-color .22s, transform .2s var(--ease-out)}
.related a:hover{text-decoration:none;border-color:var(--cyan);transform:translateY(-2px)}
.related a b{display:block;font-size:15px}
.related a span{font-size:13px;color:var(--muted)}
.related a .arr{color:var(--cyan)}

/* ── footer ── */
footer{border-top:1px solid var(--border-soft);background:var(--bg2);padding:52px 0 32px}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px}
.foot-grid h4{font-size:12.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--dim);margin-bottom:14px}
.foot-grid ul{list-style:none}
.foot-grid li{margin:8px 0;font-size:14px}
.foot-grid a{color:var(--muted)}
.foot-grid a:hover{color:var(--cyan);text-decoration:none}
.foot-brand p{font-size:13.5px;color:var(--dim);margin-top:12px;max-width:280px}
.foot-legal{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--dim);
  border-top:1px solid var(--border-soft);margin-top:40px;padding-top:22px}

/* ── responsive ── */
@media (max-width:920px){
  .grid{grid-template-columns:1fr 1fr}
  .grid2,.related{grid-template-columns:1fr}
  .nav-links{display:none}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:580px){
  .grid{grid-template-columns:1fr}
  .page-hero{padding:52px 0 44px}
  section{padding:56px 0}
  .foot-grid{grid-template-columns:1fr}
}

/* ── reduced motion ── */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .rv{opacity:1;transform:none}
}

/* ── print ── */
@media print{
  body{background:#fff;color:#111}
  nav.top,#progress,.cta-band,.related,footer .foot-grid{display:none !important}
  .kicker{color:#0369a1}
  h1,h2,h3,.prose h2,.prose h3{color:#111 !important}
  .page-hero h1 .grad{background:none;color:#111;-webkit-text-fill-color:#111}
  .lead,.prose>p,.prose li,.card p,.spec td{color:#333 !important}
  .card,.panel,.faq details,.figure{background:#fff;border:1px solid #bbb;box-shadow:none}
  .prose .formula{background:#f5f5f5;color:#111}
  section{padding:24px 0;page-break-inside:avoid}
  a{color:#0369a1}
}