/* ============================================================================
   Cierta AI — design system. Production stylesheet for the marketing site.
   Tokens → base → layout → components → motion → responsive.
   Brand: deep navy canvas, teal signal, blue evidence accent. Manrope/Inter.
   ========================================================================== */

/* ---- tokens ---- */
:root{
  /* palette */
  --navy900:#06141F; --navy850:#081A28; --navy800:#0D2338; --navy700:#15304A; --navy600:#1E3F5C;
  --blue:#2D6BF0; --blue400:#5B8DF7; --teal:#19C8B0; --teal500:#14B8A6; --teal600:#0E9384;
  --ink:#0B1F30; --ink2:#33485C; --slate:#516072; --slate400:#8A9BAD; --slate300:#AEBCC9;
  --bg:#F7FAFC; --bg2:#EEF3F8; --card:#FFFFFF; --line:#E3EAF1; --line2:#D4DEE8;
  --warn-bg:#FEF6E7; --warn-line:#F4D58A; --warn-ink:#8A5A00;
  /* type scale (fluid) */
  --t-eyebrow:clamp(11px,.78rem,12.5px);
  --t-body:clamp(15.5px,1.02rem,16.5px);
  --t-lead:clamp(17px,1.18rem,19px);
  --t-h3:clamp(18px,1.3rem,20px);
  --t-h2:clamp(28px,3.6vw,42px);
  --t-h1:clamp(38px,5.4vw,64px);
  /* space / radius / shadow / motion */
  --sp:8px; --r:14px; --r-lg:20px; --r-pill:999px;
  --maxw:1140px;
  --sh-sm:0 1px 2px rgba(11,31,48,.06), 0 1px 1px rgba(11,31,48,.04);
  --sh:0 4px 16px rgba(11,31,48,.07), 0 2px 6px rgba(11,31,48,.05);
  --sh-lg:0 24px 60px rgba(6,20,31,.18), 0 8px 24px rgba(6,20,31,.10);
  --sh-teal:0 10px 30px rgba(20,184,166,.30);
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.55s;
}

/* ---- base ---- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:'Inter',system-ui,-apple-system,sans-serif;font-size:var(--t-body);line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{display:block;max-width:100%}
a{color:var(--blue);text-decoration:none;transition:color .15s var(--ease)}
a:hover{color:var(--teal600)}
h1,h2,h3,h4{font-family:'Manrope',system-ui,sans-serif;letter-spacing:-.022em;line-height:1.08;margin:0 0 .5em;color:var(--ink)}
p{margin:0 0 1em}
::selection{background:rgba(25,200,176,.25)}

/* accessibility: skip link + visible focus */
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--teal);color:var(--navy900);padding:12px 18px;border-radius:0 0 10px 0;font-weight:700}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px;border-radius:4px}
a:focus-visible,button:focus-visible,.btn:focus-visible{outline:3px solid var(--teal);outline-offset:3px}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.accent{color:var(--teal)}
.eyebrow{font-size:var(--t-eyebrow);letter-spacing:.18em;text-transform:uppercase;color:var(--teal600);font-weight:700;margin-bottom:16px}
.dark .eyebrow{color:var(--teal)}
.lead{font-size:var(--t-lead);color:var(--slate);line-height:1.6}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:'Inter';font-weight:600;font-size:14.5px;line-height:1;border:1px solid transparent;border-radius:11px;padding:12px 20px;cursor:pointer;transition:transform .12s var(--ease),box-shadow .18s var(--ease),background .18s,color .18s,border-color .18s;white-space:nowrap}
.btn svg{width:17px;height:17px}
.btn:hover{transform:translateY(-1.5px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--teal);color:var(--navy900);box-shadow:var(--sh-teal)}
.btn-primary:hover{background:#1ED4BA;color:var(--navy900);box-shadow:0 14px 36px rgba(20,184,166,.42)}
.btn-ghost{background:rgba(255,255,255,.04);color:#fff;border-color:rgba(255,255,255,.22)}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-secondary{background:var(--navy900);color:#fff}
.btn-secondary:hover{background:var(--navy800);color:#fff}
.btn-lg{padding:15px 28px;font-size:15.5px;border-radius:12px}
.btn-block{width:100%;justify-content:center}

/* ---- nav ---- */
.nav{position:sticky;top:0;z-index:100;background:rgba(6,20,31,.72);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid rgba(255,255,255,.07);transition:background .3s,box-shadow .3s,border-color .3s}
.nav.scrolled{background:rgba(6,20,31,.94);box-shadow:0 8px 30px rgba(0,0,0,.28)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-family:'Manrope';font-weight:800;font-size:18.5px;letter-spacing:-.01em}
.brand svg{width:30px;height:30px}
.brand:hover{color:#fff}
.navlinks{display:flex;align-items:center;gap:30px}
.navlinks a:not(.btn){color:#C4D2DE;font-size:14.5px;font-weight:500;position:relative;padding:4px 0}
.navlinks a:not(.btn):hover{color:#fff}
.navlinks a:not(.btn).active{color:#fff}
.navlinks a:not(.btn).active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--teal);border-radius:2px}
.navtoggle{display:none;background:none;border:1px solid rgba(255,255,255,.18);border-radius:9px;color:#fff;width:42px;height:40px;cursor:pointer;align-items:center;justify-content:center}
.navtoggle svg{width:20px;height:20px}

/* ---- hero ---- */
.dark{background:
  radial-gradient(900px 480px at 82% -8%, rgba(25,200,176,.16) 0%, transparent 60%),
  radial-gradient(800px 500px at 8% 0%, rgba(45,107,240,.14) 0%, transparent 55%),
  linear-gradient(180deg, var(--navy850) 0%, var(--navy900) 70%);
  color:#E6EDF3}
.dark h1,.dark h2,.dark h3{color:#fff}
.hero{padding:84px 0 88px}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;gap:56px;align-items:center}
.hero h1{font-weight:800;font-size:var(--t-h1);margin-bottom:22px}
.hero .sub{font-size:clamp(17px,1.35vw,20px);color:var(--slate300);max-width:540px;margin-bottom:30px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.trust-line{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:30px;color:var(--slate400);font-size:13px;font-weight:500}
.trust-line span{display:inline-flex;align-items:center;gap:7px}
.trust-line svg{width:15px;height:15px;color:var(--teal)}
.hero-center{text-align:center}
.hero-center .sub{margin-left:auto;margin-right:auto}
.hero-center .cta-row{justify-content:center}

/* flow chips */
.flow{display:flex;gap:9px;align-items:center;flex-wrap:wrap;font-size:12.5px;font-weight:600}
.flow.center{justify-content:center}
.flow span{padding:8px 15px;border:1px solid rgba(25,200,176,.32);border-radius:var(--r-pill);color:#D5E1EA;background:rgba(25,200,176,.07)}
.flow b{color:var(--teal)}

/* ---- product visual (hero) ---- */
.viz{position:relative;background:linear-gradient(165deg,var(--navy800),var(--navy900));border:1px solid rgba(255,255,255,.1);border-radius:var(--r-lg);padding:22px;box-shadow:var(--sh-lg);overflow:hidden}
.viz::before{content:"";position:absolute;inset:0;background:radial-gradient(400px 200px at 80% 0,rgba(25,200,176,.12),transparent 70%);pointer-events:none}
.viz-bar{display:flex;align-items:center;gap:7px;margin-bottom:16px}
.viz-dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.16)}
.viz-bar .viz-title{margin-left:8px;font-size:12px;color:var(--slate400);font-weight:600;letter-spacing:.02em}
.viz-row{display:flex;gap:12px;align-items:stretch;position:relative;z-index:1}
.viz-doc{flex:0 0 96px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px 11px}
.viz-doc .ln{height:6px;border-radius:3px;background:rgba(255,255,255,.12);margin-bottom:7px}
.viz-doc .ln.s{width:70%}.viz-doc .ln.hl{background:rgba(25,200,176,.55);width:88%}
.viz-card{flex:1;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.11);border-radius:12px;padding:15px 16px}
.viz-code{display:inline-flex;align-items:center;gap:8px;background:rgba(45,107,240,.16);border:1px solid rgba(91,141,247,.4);color:#BBD0FB;font-family:ui-monospace,Menlo,monospace;font-size:13px;font-weight:600;padding:5px 11px;border-radius:8px;margin-bottom:11px}
.viz-card h5{font-family:'Manrope';color:#fff;font-size:14.5px;margin:0 0 6px}
.viz-card p{color:var(--slate300);font-size:12.5px;line-height:1.5;margin:0 0 12px}
.viz-tags{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:13px}
.viz-tags em{font-style:normal;font-size:11px;font-weight:600;color:#9FE9DC;background:rgba(25,200,176,.12);border:1px solid rgba(25,200,176,.3);padding:3px 9px;border-radius:var(--r-pill)}
.viz-evi{display:flex;align-items:center;gap:9px;padding:9px 11px;background:rgba(25,200,176,.08);border:1px solid rgba(25,200,176,.22);border-radius:9px;font-size:12px;color:#CFEAE4}
.viz-evi svg{width:16px;height:16px;color:var(--teal);flex:0 0 16px}
.viz-foot{display:flex;align-items:center;gap:8px;margin-top:14px;padding-top:13px;border-top:1px solid rgba(255,255,255,.08);font-size:11.5px;color:var(--slate400)}
.viz-foot .chain{display:flex;gap:4px}
.viz-foot .chain i{width:7px;height:7px;border-radius:2px;background:rgba(25,200,176,.5)}
.scan{position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,transparent,var(--teal),transparent);opacity:.8;animation:scan 4.5s var(--ease) infinite}
@keyframes scan{0%{transform:translateY(54px);opacity:0}12%{opacity:.9}50%{transform:translateY(230px);opacity:.9}70%,100%{transform:translateY(300px);opacity:0}}

/* ---- sections ---- */
section{padding:84px 0}
.section-head{max-width:680px;margin:0 auto 52px;text-align:center}
.section-head h2{font-size:var(--t-h2)}
.section-head p{font-size:var(--t-lead);color:var(--slate);margin:0}
.dark .section-head p{color:var(--slate300)}

/* cards */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px;box-shadow:var(--sh-sm);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh);border-color:var(--line2)}
.card .ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(140deg,rgba(25,200,176,.16),rgba(45,107,240,.12));display:flex;align-items:center;justify-content:center;color:var(--teal600);margin-bottom:18px}
.card .ic svg{width:23px;height:23px}
.card h3{font-size:var(--t-h3);margin-bottom:9px}
.card p{margin:0;color:var(--slate);font-size:15px}
.dark .card{background:rgba(255,255,255,.035);border-color:rgba(255,255,255,.09)}
.dark .card:hover{border-color:rgba(25,200,176,.4);box-shadow:0 18px 40px rgba(0,0,0,.3)}
.dark .card h3{color:#fff}.dark .card p{color:var(--slate300)}
.dark .card .ic{background:rgba(25,200,176,.12);color:var(--teal)}

/* steps */
.steps{display:grid;gap:20px;grid-template-columns:repeat(4,1fr);counter-reset:s}
.step{position:relative;padding:26px 22px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh-sm)}
.dark .step{background:rgba(255,255,255,.035);border-color:rgba(255,255,255,.09)}
.step .num{counter-increment:s;display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(140deg,var(--teal),var(--teal600));color:var(--navy900);font-family:'Manrope';font-weight:800;font-size:16px;margin-bottom:16px}
.step .num::before{content:counter(s)}
.step h3{font-size:16.5px;margin-bottom:6px}.dark .step h3{color:#fff}
.step p{margin:0;font-size:14.5px;color:var(--slate)}.dark .step p{color:var(--slate300)}

/* split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.split+.split{margin-top:34px}
.split.rev .panel{order:-1}        /* desktop: panel on the left */
.split h2{font-size:clamp(24px,3vw,34px);margin:14px 0 14px}
.panel{background:var(--navy800);border:1px solid rgba(255,255,255,.09);border-radius:var(--r-lg);padding:30px;box-shadow:var(--sh);color:#E6EDF3}
.panel.deep{background:var(--navy900)}
.panel ul{list-style:none;margin:0;padding:0}
.panel li{padding:13px 0 13px 32px;position:relative;border-bottom:1px solid rgba(255,255,255,.07);font-size:15px}
.panel li:last-child{border-bottom:none}
.panel li b{color:#fff}
.panel li svg{position:absolute;left:0;top:14px;width:19px;height:19px;color:var(--teal)}

/* trust strip */
.strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--card);box-shadow:var(--sh-sm)}
.strip .it{padding:26px 22px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.strip .it:last-child{border-right:none}
.strip .it svg{width:22px;height:22px;color:var(--teal600);margin-bottom:4px}
.strip b{font-family:'Manrope';font-weight:800;font-size:15px;color:var(--ink)}
.strip span{font-size:13px;color:var(--slate);line-height:1.45}

/* comparison / differentiation */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh)}
.compare .col{padding:30px 28px}
.compare .col.them{background:var(--bg2)}
.compare .col.us{background:var(--card);border-left:2px solid var(--teal)}
.compare h3{font-size:16px;margin-bottom:18px;display:flex;align-items:center;gap:9px}
.compare h3 .tag{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:3px 9px;border-radius:var(--r-pill)}
.compare .them .tag{background:#E7EDF3;color:var(--slate)}
.compare .us .tag{background:rgba(25,200,176,.14);color:var(--teal600)}
.compare ul{list-style:none;margin:0;padding:0}
.compare li{position:relative;padding:11px 0 11px 30px;font-size:14.5px;color:var(--ink2);border-bottom:1px solid var(--line)}
.compare li:last-child{border-bottom:none}
.compare li svg{position:absolute;left:0;top:12px;width:18px;height:18px}
.compare .them li svg{color:var(--slate400)}
.compare .us li{color:var(--ink)}
.compare .us li svg{color:var(--teal600)}

/* FAQ */
.faq{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh-sm);overflow:hidden;transition:border-color .2s}
.faq details[open]{border-color:var(--line2)}
.faq summary{list-style:none;cursor:pointer;padding:20px 24px;font-family:'Manrope';font-weight:700;font-size:16.5px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary .pl{flex:0 0 22px;width:22px;height:22px;position:relative;transition:transform .25s var(--ease)}
.faq summary .pl::before,.faq summary .pl::after{content:"";position:absolute;background:var(--teal600);border-radius:2px;top:50%;left:50%;transform:translate(-50%,-50%)}
.faq summary .pl::before{width:14px;height:2px}.faq summary .pl::after{width:2px;height:14px;transition:transform .25s var(--ease)}
.faq details[open] summary .pl::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq .ans{padding:0 24px 22px;color:var(--slate);font-size:15px;line-height:1.65}

/* cta band */
.band{position:relative;background:linear-gradient(125deg,var(--navy800),var(--navy900));border-radius:var(--r-lg);padding:60px 44px;text-align:center;color:#fff;overflow:hidden;box-shadow:var(--sh-lg)}
.band::before{content:"";position:absolute;inset:0;background:radial-gradient(500px 240px at 50% -20%,rgba(25,200,176,.22),transparent 70%)}
.band>*{position:relative}
.band h2{font-size:clamp(26px,3.6vw,38px);margin-bottom:13px}
.band p{color:var(--slate300);max-width:540px;margin:0 auto 28px;font-size:var(--t-lead)}
.band .cta-row{justify-content:center}
.band.outline{background:transparent;border:1px solid rgba(255,255,255,.12);box-shadow:none}

/* badges / notes / draft */
.badge{display:inline-flex;align-items:center;font:700 11px/1 ui-monospace,Menlo,monospace;letter-spacing:.13em;text-transform:uppercase;color:var(--ink2);background-color:var(--card);border:1px solid var(--line2);box-shadow:var(--sh-sm);padding:8px 15px 8px 34px;border-radius:var(--r-pill);background-repeat:no-repeat;background-position:12px center;background-size:17px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Ccircle cx='12' cy='12' r='9' stroke='%23B9832C' stroke-width='1.6'/%3E%3Ccircle cx='12' cy='12' r='5.5' stroke='%23B9832C' stroke-width='1' opacity='.55'/%3E%3Cpath d='M9 12l2 2 4-4.5' stroke='%230E9384' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
.dark .badge{color:var(--slate300);background-color:rgba(255,255,255,.05);border-color:rgba(224,174,78,.28);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Ccircle cx='12' cy='12' r='9' stroke='%23E0AE4E' stroke-width='1.6'/%3E%3Ccircle cx='12' cy='12' r='5.5' stroke='%23E0AE4E' stroke-width='1' opacity='.6'/%3E%3Cpath d='M9 12l2 2 4-4.5' stroke='%2319C8B0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
.note{font-size:13.5px;color:var(--slate400)}
.draftbar{background:var(--warn-bg);border:1px solid var(--warn-line);color:var(--warn-ink);padding:13px 18px;border-radius:11px;font-size:14px;margin-bottom:30px;display:flex;gap:10px;align-items:flex-start}
.draftbar svg{width:18px;height:18px;flex:0 0 18px;margin-top:1px}
.prose{max-width:760px;margin:0 auto}
.prose h3{margin-top:34px;font-size:21px}
.prose p{color:var(--ink2);font-size:16.5px;line-height:1.7}

/* ---- forms ---- */
.formwrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;max-width:1000px;margin:0 auto}
.formcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:34px;box-shadow:var(--sh)}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field .req{color:var(--teal600)}
.field input,.field select,.field textarea{width:100%;padding:13px 14px;border:1.5px solid var(--line2);border-radius:11px;font:inherit;font-size:15px;color:var(--ink);background:#fff;transition:border-color .15s,box-shadow .15s}
.field input::placeholder,.field textarea::placeholder{color:var(--slate400)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px rgba(25,200,176,.15)}
.field input[aria-invalid="true"],.field select[aria-invalid="true"]{border-color:#E5484D;box-shadow:0 0 0 4px rgba(229,72,77,.12)}
.field textarea{min-height:118px;resize:vertical}
.field .err-txt{color:#C2362B;font-size:12.5px;margin-top:6px;display:none}
.field input[aria-invalid="true"]~.err-txt,.field select[aria-invalid="true"]~.err-txt{display:block}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.formmsg{padding:14px 16px;border-radius:11px;font-size:14.5px;margin-bottom:20px;display:none;align-items:flex-start;gap:10px}
.formmsg svg{width:18px;height:18px;flex:0 0 18px;margin-top:1px}
.formmsg.ok{display:flex;background:rgba(25,200,176,.1);border:1px solid rgba(25,200,176,.4);color:var(--teal600)}
.formmsg.err{display:flex;background:rgba(229,72,77,.07);border:1px solid rgba(229,72,77,.34);color:#C2362B}
.aside-list{list-style:none;margin:18px 0 0;padding:0}
.aside-list li{position:relative;padding:11px 0 11px 30px;font-size:15px;color:var(--ink2);border-bottom:1px solid var(--line)}
.aside-list li:last-child{border-bottom:none}
.aside-list li svg{position:absolute;left:0;top:12px;width:18px;height:18px;color:var(--teal600)}

/* ---- footer ---- */
.footer{background:var(--navy900);color:var(--slate300);padding:60px 0 30px;font-size:14.5px}
.footer .cols{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:34px;margin-bottom:40px}
.footer .brand{margin-bottom:14px}
.footer h4{color:#fff;font-family:'Manrope';font-size:12.5px;letter-spacing:.07em;text-transform:uppercase;margin:0 0 15px}
.footer a{display:block;color:var(--slate300);padding:6px 0;font-size:14px}
.footer a:hover{color:#fff}
.footer .desc{color:var(--slate400);max-width:300px;font-size:14px;line-height:1.6}
.footer .legal{border-top:1px solid rgba(255,255,255,.09);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:12.5px;color:var(--slate400)}
.footer .legal a{display:inline;color:var(--slate400)}.footer .legal a:hover{color:#fff}

/* ---- 404 ---- */
.e404{min-height:74vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 24px}
.e404 .big{font-family:'Manrope';font-weight:800;font-size:clamp(64px,14vw,140px);line-height:1;background:linear-gradient(120deg,var(--teal),var(--blue400));-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:8px}

/* ============================================================================
   SIGNATURE SYSTEM — the elements nobody else in the category has.
   The Cierta Seal (a rotating, hash-bearing cryptographic seal) + the Custody
   Thread (an unbroken line from record → code → review → sealed record).
   ========================================================================== */
:root{--seal:#E0AE4E;--seal2:#B9832C;--paper:#F4F0E6;--paper-ink:#2B2620}

/* The Cierta Seal */
.seal{position:relative;display:inline-block;line-height:0}
.seal svg{overflow:visible;display:block}
.seal .ring{fill:none;stroke:var(--seal);opacity:.9}
.seal .ring.thin{stroke-width:1;opacity:.6}
.seal .ticks{fill:none;stroke:var(--seal);stroke-width:6;stroke-dasharray:.6 7.2;opacity:.65}
.seal .stext{fill:var(--seal);font:700 7px/1 ui-monospace,Menlo,monospace;letter-spacing:.24em}
.seal .scheck{fill:none;stroke:var(--teal);stroke-width:5;stroke-linecap:round;stroke-linejoin:round}
.seal .sshield{fill:none;stroke:var(--teal);stroke-width:2.4;opacity:.55}
.seal .shash{fill:var(--teal);font:600 7.5px ui-monospace,Menlo,monospace;letter-spacing:.04em;text-anchor:middle}
.seal .rot{transform-box:fill-box;transform-origin:center;animation:sealspin 26s linear infinite}
@keyframes sealspin{to{transform:rotate(360deg)}}
.seal::after{content:"";position:absolute;inset:-14%;border-radius:50%;background:radial-gradient(circle,rgba(224,174,78,.2),transparent 64%);z-index:-1}

/* Custody panel + thread */
.custody{position:relative;background:linear-gradient(168deg,var(--navy800),var(--navy900));border:1px solid rgba(255,255,255,.1);border-radius:var(--r-lg);padding:22px 22px 18px;box-shadow:var(--sh-lg);overflow:hidden}
.custody::before{content:"";position:absolute;inset:0;background:radial-gradient(360px 180px at 88% -10%,rgba(224,174,78,.1),transparent 70%);pointer-events:none}
.custody-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;position:relative}
.custody-head .t{font-size:12px;color:var(--slate300);font-weight:600;letter-spacing:.02em;display:inline-flex;align-items:center;gap:8px}
.custody-head .t svg{width:15px;height:15px;color:var(--teal)}
.custody-head .sealtag{font:700 10px ui-monospace,Menlo,monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--seal);border:1px solid rgba(224,174,78,.45);padding:4px 10px;border-radius:var(--r-pill)}
.thread{position:relative}
.thread-line{position:absolute;left:15px;top:18px;bottom:34px;width:2px;background:linear-gradient(var(--teal) 0%,var(--teal) 62%,var(--seal) 100%);border-radius:2px;opacity:.6}
.node{position:relative;display:flex;gap:15px;padding-bottom:16px}
.node:last-child{padding-bottom:0}
.node .dot{flex:0 0 32px;width:32px;height:32px;border-radius:50%;background:var(--navy850);border:2px solid var(--teal);display:flex;align-items:center;justify-content:center;color:var(--teal);z-index:1;box-shadow:0 0 0 5px rgba(25,200,176,.08)}
.node .dot svg{width:15px;height:15px}
.art{flex:1;min-width:0;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:12px 14px}
.art .lbl{display:block;font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--slate400);margin-bottom:7px}
.art p{margin:0;font-size:13px;color:#DCE6EE;line-height:1.5}
.art mark{background:rgba(25,200,176,.22);color:#D6F5EE;padding:1px 5px;border-radius:4px}
.art .cite{display:block;margin-top:8px;font:600 11px ui-monospace,Menlo,monospace;color:var(--slate400)}
.art .code{display:inline-flex;align-items:center;font:600 14px ui-monospace,Menlo,monospace;color:#C2D6FB;background:rgba(45,107,240,.18);border:1px solid rgba(91,141,247,.42);padding:5px 11px;border-radius:8px}
.art .meat{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.art .meat em{font-style:normal;font-size:10.5px;font-weight:600;color:#9FE9DC;background:rgba(25,200,176,.12);border:1px solid rgba(25,200,176,.3);padding:3px 9px;border-radius:var(--r-pill)}
.node-seal .dot{border-color:var(--seal);color:var(--seal);box-shadow:0 0 0 5px rgba(224,174,78,.1)}
.art-seal{display:flex;align-items:center;justify-content:space-between;gap:12px;border-color:rgba(224,174,78,.38);background:rgba(224,174,78,.07)}
.art-seal .hash{display:block;margin-top:6px;font:600 11px ui-monospace,Menlo,monospace;color:var(--seal);letter-spacing:.02em}

/* The chain stamps itself into the record: the thread draws, nodes arrive in
   custody order, and the Seal presses down. Replays on hover. Motion-gated so
   reduced-motion / no-JS always show the finished chain. */
@media (prefers-reduced-motion: no-preference){
  .js .custody .thread-line{transform:scaleY(.85);transform-origin:top}
  .js .custody.in .thread-line{animation:draw 1.5s var(--ease) .1s forwards}
  .js .custody .node{opacity:1;transform:translateY(6px)}
  .js .custody.in .node{animation:nodein .55s var(--ease) forwards;animation-delay:var(--d,0s)}
  .js .custody.in .node-seal .seal{animation:stamp .6s var(--ease) backwards;animation-delay:var(--sd,1.5s)}
  .custody:hover .node-seal .seal{animation:stamp .55s var(--ease)}
  .custody:hover .sealtag{animation:sealflash 1.1s var(--ease)}
}
@keyframes draw{to{transform:scaleY(1)}}
@keyframes nodein{to{opacity:1;transform:none}}
@keyframes stamp{0%{opacity:1;transform:scale(1.35) rotate(-10deg)}55%{opacity:1;transform:scale(.9) rotate(2deg)}80%{transform:scale(1.04)}100%{transform:scale(1) rotate(0)}}
@keyframes sealflash{0%{box-shadow:0 0 0 0 rgba(224,174,78,.5)}100%{box-shadow:0 0 0 12px rgba(224,174,78,0)}}

/* concept statement */
.concept{text-align:center;max-width:920px;margin:0 auto}
.concept .big{font-family:'Manrope';font-weight:800;font-size:clamp(26px,4.2vw,48px);line-height:1.12;letter-spacing:-.025em;color:#fff;margin:0}
.concept .big .muted{color:var(--slate400)}
.concept .big .u{color:var(--teal)}
.seal-feature{display:flex;justify-content:center;align-items:center;min-height:240px}

/* ---- THE EVIDENCE DOSSIER — site-wide identity ----
   Every section is a numbered Exhibit on a custody spine; every card carries a
   forensic § reference. This is the framework that makes a logo-less screenshot
   unmistakably Cierta. */
body{counter-reset:exhibit}
.section-head{counter-increment:exhibit;position:relative}
.section-head .eyebrow{display:inline-flex;align-items:center;font-family:ui-monospace,Menlo,monospace;font-weight:700;font-size:11px;letter-spacing:.14em;padding:8px 16px 8px 38px;border:1px solid var(--line2);border-radius:var(--r-pill);background-color:var(--card);color:var(--ink2);box-shadow:var(--sh-sm);background-repeat:no-repeat;background-position:13px center;background-size:18px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Ccircle cx='12' cy='12' r='9' stroke='%23B9832C' stroke-width='1.6'/%3E%3Ccircle cx='12' cy='12' r='5.5' stroke='%23B9832C' stroke-width='1' opacity='.55'/%3E%3Cpath d='M9 12l2 2 4-4.5' stroke='%230E9384' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
.dark .section-head .eyebrow{background-color:rgba(255,255,255,.05);border-color:rgba(224,174,78,.28);color:var(--slate300);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Ccircle cx='12' cy='12' r='9' stroke='%23E0AE4E' stroke-width='1.6'/%3E%3Ccircle cx='12' cy='12' r='5.5' stroke='%23E0AE4E' stroke-width='1' opacity='.6'/%3E%3Cpath d='M9 12l2 2 4-4.5' stroke='%2319C8B0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
.section-head .eyebrow::before{content:"Exhibit " counter(exhibit,decimal-leading-zero) "  ·  ";color:var(--seal2);font-weight:800}
.dark .section-head .eyebrow::before{color:var(--seal)}
/* the custody spine: a gold seal-dot + thread descending into each exhibit */
.section-head::before{content:"";position:absolute;left:50%;top:-44px;width:1.5px;height:30px;background:linear-gradient(var(--seal),rgba(224,174,78,0));transform:translateX(-50%);opacity:.55}
.section-head::after{content:"";position:absolute;left:50%;top:-52px;width:9px;height:9px;border-radius:50%;background:var(--seal);transform:translateX(-50%);box-shadow:0 0 0 3px rgba(224,174,78,.28),0 0 0 7px rgba(224,174,78,.12)}

/* forensic § reference auto-stamped on every card */
.grid{counter-reset:ev}
.card{counter-increment:ev}
.card::after{content:"§ E-" counter(ev,decimal-leading-zero);position:absolute;top:15px;right:17px;font:600 10px/1 ui-monospace,Menlo,monospace;letter-spacing:.06em;color:var(--slate400);opacity:.75}
.dark .card::after{color:var(--slate400)}

/* dossier footer seal */
.foot-seal{display:flex;align-items:center;gap:14px;margin-top:6px}
.foot-seal .seal{width:52px;height:52px;flex:0 0 52px}
.foot-seal .fs-txt{font:600 11px/1.5 ui-monospace,Menlo,monospace;letter-spacing:.04em;color:var(--slate400)}
.foot-seal .fs-txt b{display:block;color:var(--seal);letter-spacing:.12em;text-transform:uppercase;font-size:10.5px;margin-bottom:3px}

/* ---- motion: scroll reveal (progressive enhancement) ----
   Content is fully visible by default, including before IntersectionObserver
   fires. JS can add motion, but it never hides page content from full-page
   captures, blocked-JS users, or crawlers. */
.reveal{opacity:1;transform:none}
.js .reveal{opacity:1;transform:translateY(10px);transition:transform var(--dur) var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.js .reveal.d1{transition-delay:.08s}.js .reveal.d2{transition-delay:.16s}.js .reveal.d3{transition-delay:.24s}
@media (prefers-reduced-motion: reduce){
  *{animation:none !important;scroll-behavior:auto !important}
  .js .reveal{opacity:1;transform:none;transition:none}
  .scan{display:none}
}

/* ---- responsive ---- */
@media(max-width:940px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero .sub{max-width:none}
  .split{grid-template-columns:1fr;gap:30px}
  .split.rev .panel{order:0}       /* mobile: restore source order (text first) */
  .grid-3,.steps{grid-template-columns:1fr 1fr}
  .footer .cols{grid-template-columns:1fr 1fr}
  .formwrap{grid-template-columns:1fr;gap:32px}
}
@media(max-width:760px){
  .navlinks{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;gap:6px;background:var(--navy900);padding:16px 24px 22px;border-bottom:1px solid rgba(255,255,255,.1);box-shadow:0 20px 40px rgba(0,0,0,.4)}
  .navlinks.open{display:flex}
  .navlinks a:not(.btn){padding:11px 0;font-size:16px;border-bottom:1px solid rgba(255,255,255,.06)}
  .navlinks .btn{margin-top:8px;justify-content:center}
  .navtoggle{display:inline-flex}
  section{padding:64px 0}
  .compare{grid-template-columns:1fr}
  .compare .col.us{border-left:none;border-top:2px solid var(--teal)}
  .strip{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  .grid-3,.grid-2,.steps,.strip,.row2{grid-template-columns:1fr}
  .hero{padding:60px 0 64px}
  .band{padding:44px 24px}
  .viz-row{flex-direction:column}.viz-doc{flex-basis:auto}
}