/* Sovereign AI Platform — public marketing
   Conservative institutional palette. Single accent (deep indigo).
   No bright colors. No animation beyond hover. */

:root{
  --bg:        #fbfaf7;          /* warm off-white */
  --bg-alt:   #f3f1ec;
  --bg-dark:  #0b1d33;           /* deep navy for trust band */
  --ink:      #131516;
  --ink-soft: #4b5563;
  --line:     #e5e1d8;
  --accent:   #1d3a8a;
  --accent-2: #c4a64a;           /* thin gold for serif underline */
  --ok:       #15803d;
  --fail:     #b91c1c;
  --pending:  #78716c;
  --radius:   3px;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family:'Inter',system-ui,-apple-system,Segoe UI,sans-serif;
  font-weight:400; line-height:1.55; color:var(--ink); background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{ font-family:'Source Serif 4',Georgia,serif; font-weight:600; letter-spacing:-0.01em; line-height:1.18; color:var(--ink); }
h1{ font-size:clamp(2.2rem,4.4vw,3.4rem); margin:0 0 1rem; }
h2{ font-size:clamp(1.6rem,2.6vw,2.2rem); margin:0 0 .8rem; }
h3{ font-size:1.18rem; margin:0 0 .5rem; }
p{ color:var(--ink-soft); margin:0 0 1rem; }
code{ font-family:'JetBrains Mono',ui-monospace,SFMono-Regular,monospace; font-size:.92em; background:rgba(29,58,138,.06); padding:1px 6px; border-radius:2px; color:var(--ink); }
a{ color:var(--accent); text-decoration:none; }
a:hover{ text-decoration:underline; text-decoration-color:var(--accent-2); text-underline-offset:3px; }

.container{ max-width:1180px; margin:0 auto; padding:0 1.5rem; }
.container.narrow{ max-width:780px; }

/* Header */
.site-header{ position:sticky; top:0; z-index:50; background:rgba(251,250,247,.92); backdrop-filter:blur(8px); border-bottom:1px solid var(--line); }
.nav{ display:flex; align-items:center; justify-content:space-between; padding:14px 1.5rem; }
.brand{ display:inline-flex; align-items:center; gap:.55rem; font-family:'Source Serif 4',serif; font-weight:700; font-size:1.05rem; color:var(--ink); letter-spacing:.04em; }
.brand-mark{ width:14px; height:14px; background:linear-gradient(135deg,var(--accent),var(--accent-2)); display:inline-block; transform:rotate(45deg); border-radius:1px; }
nav{ display:flex; align-items:center; gap:1.6rem; }
nav a{ font-size:.86rem; font-weight:500; color:var(--ink-soft); }
nav a:hover{ color:var(--accent); text-decoration:none; }
nav a.active{ color:var(--accent); }
nav a.cta{ background:var(--accent); color:#fff; padding:8px 14px; border-radius:var(--radius); font-weight:600; }
nav a.cta:hover{ background:#16306e; text-decoration:none; }

@media(max-width:880px){
  nav a:not(.cta){ display:none; }
}

/* Hero */
.hero{ padding:7rem 0 5rem; background:linear-gradient(180deg,var(--bg) 0%,var(--bg-alt) 100%); border-bottom:1px solid var(--line); }
.hero.short{ padding:5rem 0 3rem; }
.eyebrow{ font-size:.78rem; letter-spacing:.16em; text-transform:uppercase; color:var(--accent); font-weight:600; margin:0 0 1rem; }
.lede{ font-size:1.2rem; color:var(--ink-soft); max-width:760px; margin:0 0 1.5rem; }
.lede-narrow{ font-size:1.05rem; color:var(--ink-soft); max-width:680px; margin:0 0 2rem; }
.cta-row{ display:flex; gap:.8rem; flex-wrap:wrap; align-items:center; margin:1.5rem 0; }

.btn-primary,.btn-secondary{
  display:inline-block; padding:11px 22px; border-radius:var(--radius); font-weight:600; font-size:.92rem; letter-spacing:.01em;
  border:1.5px solid transparent; cursor:pointer; transition:all .15s; text-decoration:none;
}
.btn-primary{ background:var(--accent); color:#fff; }
.btn-primary:hover{ background:#16306e; text-decoration:none; }
.btn-secondary{ background:transparent; color:var(--accent); border-color:var(--accent); }
.btn-secondary:hover{ background:rgba(29,58,138,.06); text-decoration:none; }
.btn-primary.block,.btn-secondary.block{ display:block; text-align:center; width:100%; }

.small{ font-size:.85rem; color:var(--ink-soft); }
.center{ text-align:center; }
.muted{ color:var(--ink-soft); }

/* Sections */
.band{ padding:5rem 0; border-bottom:1px solid var(--line); }
.band-light{ background:var(--bg-alt); }
.band-dark{ background:var(--bg-dark); color:#e5e1d8; }
.band-dark h2,.band-dark h3{ color:#fff; }
.band-dark p,.band-dark li{ color:#cbd5e1; }
.band-dark .inverted{ color:#fff; }
.band-dark .section-eyebrow.inverted{ color:var(--accent-2); }
.band-dark code{ background:rgba(255,255,255,.08); color:#fff; }
.section-eyebrow{ font-size:.78rem; letter-spacing:.16em; text-transform:uppercase; color:var(--accent); font-weight:600; margin:0 0 .8rem; }

.two-col{ display:grid; grid-template-columns: 1.2fr 1fr; gap:3rem; align-items:start; }
@media(max-width:820px){ .two-col{ grid-template-columns:1fr; gap:2rem; } }

.callout{ background:#fff; border:1px solid var(--line); border-left:3px solid var(--accent-2); padding:1.6rem 1.6rem 1.4rem; border-radius:var(--radius); }
.callout h3{ margin-bottom:.7rem; }
.callout ul{ margin:0; padding-left:1.1rem; color:var(--ink-soft); }
.callout li{ margin-bottom:.5rem; }
.callout em{ color:var(--ink); font-style:italic; }

/* Cards grid */
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:1.2rem; margin-top:2rem; }
@media(max-width:1000px){ .grid-4{ grid-template-columns:repeat(2,1fr); } }
@media(max-width:600px){ .grid-4{ grid-template-columns:1fr; } }
.card{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:1.6rem 1.4rem 1.5rem; }
.card .card-num{ display:inline-block; font-family:'JetBrains Mono',monospace; font-size:.75rem; color:var(--accent-2); letter-spacing:.1em; margin-bottom:.6rem; }
.card h3{ font-size:1.05rem; margin-bottom:.5rem; }

/* Pricing */
.grid-4.pricing{ margin-top:2.5rem; }
.card.price{ display:flex; flex-direction:column; }
.card.price .tier{ font-family:'Source Serif 4',serif; font-weight:700; font-size:1rem; color:var(--accent); margin:0 0 .4rem; letter-spacing:.04em; }
.card.price .amount{ font-family:'Source Serif 4',serif; font-weight:600; font-size:2rem; margin:0 0 .8rem; color:var(--ink); }
.card.price .amount span{ font-size:.95rem; color:var(--ink-soft); font-weight:400; }
.card.price ul{ list-style:none; padding:0; margin:0 0 1.4rem; flex-grow:1; }
.card.price li{ padding:.45rem 0; border-bottom:1px dashed var(--line); font-size:.9rem; color:var(--ink); }
.card.price li.muted{ color:#a8a29e; }
.card.price li:last-child{ border-bottom:none; }
.card.price.featured{ border:2px solid var(--accent); position:relative; }
.card.price.featured::before{ content:'Most chosen'; position:absolute; top:-12px; left:1rem; background:var(--accent); color:#fff; font-size:.7rem; font-weight:600; letter-spacing:.1em; text-transform:uppercase; padding:3px 10px; border-radius:2px; }

/* Compliance table */
.compliance-table{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); overflow:auto; margin-top:2rem; }
.compliance-table table{ width:100%; border-collapse:collapse; font-size:.92rem; }
.compliance-table th,.compliance-table td{ text-align:left; padding:.85rem 1rem; border-bottom:1px solid var(--line); vertical-align:top; }
.compliance-table th{ background:var(--bg-alt); font-weight:600; color:var(--ink); border-bottom:2px solid var(--line); }
.compliance-table tr:last-child td{ border-bottom:none; }
.compliance-table td:first-child{ font-weight:600; color:var(--accent); width:22%; }

/* Steps */
.steps{ margin:1.5rem 0; padding-left:0; counter-reset:s; list-style:none; }
.steps li{ counter-increment:s; padding:.7rem 0 .7rem 3rem; position:relative; border-bottom:1px solid var(--line); color:var(--ink-soft); }
.steps li:last-child{ border-bottom:none; }
.steps li::before{ content:counter(s,decimal-leading-zero); position:absolute; left:0; top:.7rem; font-family:'JetBrains Mono',monospace; font-size:.78rem; color:var(--accent-2); font-weight:600; letter-spacing:.05em; }
.steps li strong{ color:var(--ink); }

/* Trust list */
.trust-list{ list-style:none; padding:0; margin:0; }
.trust-list li{ padding:.55rem 0; border-bottom:1px solid rgba(255,255,255,.12); color:#cbd5e1; }
.trust-list li:last-child{ border-bottom:none; }

/* Verify card */
.verify-card textarea{
  width:100%; margin:1rem 0; padding:1rem; border:1px solid var(--line); border-radius:var(--radius);
  font-family:'JetBrains Mono',monospace; font-size:.85rem; color:var(--ink); background:#fff; resize:vertical;
}
.verify-card textarea:focus{ outline:2px solid var(--accent); outline-offset:-2px; }
.verify-output{ margin-top:1rem; }
.result{ padding:1rem 1.2rem; border-radius:var(--radius); font-size:.95rem; }
.result.pass{ background:rgba(21,128,61,.08); border-left:3px solid var(--ok); color:var(--ok); }
.result.fail{ background:rgba(185,28,28,.08); border-left:3px solid var(--fail); color:var(--fail); }
.result.pending{ background:var(--bg-alt); border-left:3px solid var(--pending); color:var(--ink-soft); }
.result strong{ color:inherit; }
.pill{ display:inline-block; padding:3px 10px; font-size:.8rem; font-weight:500; border-radius:2px; margin-right:.5rem; font-family:'JetBrains Mono',monospace; }
.pill-ok{ background:rgba(21,128,61,.15); color:var(--ok); }
.pill-fail{ background:rgba(185,28,28,.15); color:var(--fail); }

/* Contact form */
.contact-form{ display:flex; flex-direction:column; gap:1rem; margin-top:2rem; }
.contact-form .row{ display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
@media(max-width:640px){ .contact-form .row{ grid-template-columns:1fr; } }
.contact-form label{ display:flex; flex-direction:column; font-size:.85rem; color:var(--ink-soft); font-weight:500; gap:.35rem; }
.contact-form input,.contact-form select,.contact-form textarea{
  padding:.7rem .85rem; border:1px solid var(--line); border-radius:var(--radius); font-family:inherit; font-size:.95rem; color:var(--ink); background:#fff;
}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{ outline:2px solid var(--accent); outline-offset:-2px; border-color:transparent; }
.form-result{ font-size:.9rem; margin:0; min-height:1.2em; color:var(--ink-soft); }

/* Footer */
footer{ padding:3rem 0 2rem; background:var(--bg-alt); border-top:1px solid var(--line); margin-top:0; }
.footer-grid{ align-items:start; padding-top:0; padding-bottom:1.5rem; }
.footer-links{ list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:.5rem; align-items:flex-end; }
@media(max-width:820px){ .footer-links{ align-items:flex-start; } }
.footer-links a{ font-size:.88rem; color:var(--ink-soft); }
.footer-links a:hover{ color:var(--accent); }