/* ============================================================
   IPV Labs — site stylesheet
   Brand tokens from the IPV Labs visual identity (Open Sans)
   ============================================================ */

:root{
  --ink:#14142E;
  --ink-soft:#23233F;
  --paper:#F2F2EE;
  --card:#FBFBF9;
  --cobalt:#3A34F2;
  --cobalt-deep:#2A24C8;
  --coral:#FF5A4D;
  --amber:#F5A623;
  --muted:#63636F;
  --hair:rgba(20,20,46,.12);
  --mark-bg:var(--paper);
  --mark-line:#14142E;
  --maxw:1120px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"Instrument Sans",system-ui,sans-serif;
  font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.mono{font-family:"Space Mono",monospace;text-transform:uppercase;letter-spacing:.14em;font-size:12px}
h1,h2,h3{font-family:"Open Sans",sans-serif;font-weight:800;line-height:1.05;margin:0;letter-spacing:-.02em}
a{color:var(--cobalt)}
:focus-visible{outline:3px solid var(--cobalt);outline-offset:3px;border-radius:4px}

/* ---------- top bar ---------- */
.top{position:sticky;top:0;z-index:50;background:rgba(242,242,238,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--hair)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.top-logo{display:flex;align-items:center;gap:11px;font-family:"Open Sans",sans-serif;font-weight:800;font-size:18px;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.top-logo svg{width:26px;height:26px;display:block}
.top-logo .labs{color:var(--muted);font-weight:500}
.top-nav{display:flex;gap:26px;align-items:center}
.top-nav a{color:var(--muted);text-decoration:none;font-size:13px;font-weight:500}
.top-nav a:hover{color:var(--ink)}
.top-nav a.current{color:var(--ink);font-weight:600}
.top-nav .nav-cta{background:var(--cobalt);color:#fff;font-weight:600;padding:9px 16px;border-radius:10px}
.top-nav .nav-cta:hover{background:var(--cobalt-deep);color:#fff}
@media(max-width:720px){
  .top-nav{gap:16px}
  .top-nav a{font-size:12px}
  .top-nav a:not(.nav-cta):not(.current){display:none}
}

/* ---------- section frame ---------- */
.sec{padding:96px 0;border-bottom:1px solid var(--hair)}
.sec:last-of-type{border-bottom:none}
.sec-head{display:flex;align-items:baseline;gap:16px;margin-bottom:44px}
.sec-kicker{font-family:"Space Mono",monospace;font-size:13px;color:var(--cobalt);font-weight:700;text-transform:uppercase;letter-spacing:.14em;white-space:nowrap}
.sec-title{font-size:clamp(28px,4vw,44px)}
.sec-lead{max-width:640px;color:var(--muted);margin-top:14px;font-size:18px}
@media(max-width:720px){.sec{padding:72px 0}.sec-head{flex-direction:column;gap:8px}}

/* ---------- home hero ---------- */
.hero{padding:88px 0 96px;text-align:center;position:relative;overflow:hidden;border-bottom:1px solid var(--hair)}
.hero .eyebrow{color:var(--muted)}
.hero-mark{width:132px;height:132px;margin:26px auto 30px;display:block}
.hero-word{font-family:"Open Sans",sans-serif;font-weight:800;font-size:clamp(56px,11vw,120px);letter-spacing:-.03em;line-height:.92}
.hero-word .labs{color:var(--muted);font-weight:500}
.hero-tag{font-family:"Open Sans",sans-serif;font-weight:600;font-size:clamp(22px,3.4vw,34px);margin-top:22px;letter-spacing:-.02em}
.hero-sub{max-width:560px;margin:16px auto 0;color:var(--muted);font-size:19px}
.hero-actions{display:flex;gap:12px;justify-content:center;margin-top:34px;flex-wrap:wrap}
.hero-strip{display:inline-flex;gap:10px;margin-top:36px;flex-wrap:wrap;justify-content:center}
.chip{font-family:"Space Mono",monospace;font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;padding:8px 14px;border-radius:999px;border:1px solid var(--hair);display:inline-flex;align-items:center;gap:8px}
.chip i{width:8px;height:8px;border-radius:50%;display:block}

/* ---------- interior page hero ---------- */
.page-hero{padding:84px 0 72px;border-bottom:1px solid var(--hair)}
.page-hero .eyebrow{color:var(--cobalt);margin-bottom:18px}
.page-hero h1{font-size:clamp(40px,6.5vw,72px);letter-spacing:-.03em;max-width:820px}
.page-hero .lead{max-width:620px;color:var(--muted);font-size:19px;margin-top:20px}

/* ---------- stage cards ---------- */
.proc{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:840px){.proc{grid-template-columns:1fr}}
.stage{background:var(--card);border:1px solid var(--hair);border-radius:22px;padding:28px;position:relative;overflow:hidden}
.stage-ic{width:60px;height:60px;margin-bottom:20px}
.stage-k{font-family:"Space Mono",monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:700}
.stage-h{font-family:"Open Sans",sans-serif;font-weight:700;font-size:23px;margin:6px 0 10px;letter-spacing:-.01em}
.stage p{margin:0;color:var(--muted);font-size:15.5px;line-height:1.55}
.stage .rail{position:absolute;left:0;top:0;bottom:0;width:5px}
.stage.i .stage-k{color:var(--coral)} .stage.i .rail{background:var(--coral)}
.stage.p .stage-k{color:var(--amber)} .stage.p .rail{background:var(--amber)}
.stage.v .stage-k{color:var(--cobalt)} .stage.v .rail{background:var(--cobalt)}

/* ---------- method page: deep stage rows ---------- */
.stage-row{display:grid;grid-template-columns:88px 1fr 1fr;gap:32px;padding:44px 0;border-bottom:1px solid var(--hair);align-items:start}
.stage-row:last-child{border-bottom:none}
@media(max-width:840px){.stage-row{grid-template-columns:1fr;gap:18px;padding:36px 0}}
.stage-row .stage-ic{margin:0}
.stage-row h3{font-size:26px;letter-spacing:-.01em}
.stage-row .stage-k{display:block;margin-bottom:8px}
.stage-row .body{color:var(--muted);font-size:16px;margin:12px 0 0}
.deliver{background:var(--card);border:1px solid var(--hair);border-radius:18px;padding:22px}
.deliver .k{font-family:"Space Mono",monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.deliver ul{margin:0;padding-left:18px;color:var(--ink-soft);font-size:15px}
.deliver li{margin-bottom:7px}
.deliver li:last-child{margin-bottom:0}

/* ---------- generic cards ---------- */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:840px){.grid2,.grid3{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--hair);border-radius:22px;padding:28px}
.card h3{font-size:20px;margin-bottom:10px}
.card p{margin:0;color:var(--muted);font-size:15.5px}
.card .k{font-family:"Space Mono",monospace;font-size:11.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--cobalt);margin-bottom:12px}

/* ---------- buttons ---------- */
.btn{display:inline-block;border:none;border-radius:12px;padding:14px 24px;font-family:"Instrument Sans",sans-serif;font-weight:600;font-size:15px;cursor:pointer;text-decoration:none;text-align:center}
.btn.primary{background:var(--cobalt);color:#fff}
.btn.primary:hover{background:var(--cobalt-deep)}
.btn.accent{background:var(--coral);color:#fff}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--paper)}
.panel-dark .btn.ghost{color:var(--paper);border-color:var(--paper)}
.panel-dark .btn.ghost:hover{background:var(--paper);color:var(--ink)}

/* ---------- CTA band ---------- */
.cta-band{background:var(--ink);color:var(--paper);border-radius:26px;padding:56px 48px;text-align:center;--mark-bg:var(--ink);--mark-line:#5B5B7A}
.cta-band h2{font-size:clamp(28px,4vw,42px);color:var(--paper)}
.cta-band p{color:#9A9AB0;max-width:520px;margin:14px auto 0;font-size:17px}
.cta-band .btn{margin-top:28px}
.cta-band svg{width:56px;height:56px;margin:0 auto 22px;display:block}
@media(max-width:720px){.cta-band{padding:44px 26px}}
.cta-sec{padding:96px 0}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;align-items:start}
@media(max-width:840px){.contact-grid{grid-template-columns:1fr}}
.contact-card{background:var(--card);border:1px solid var(--hair);border-radius:22px;padding:32px}
.contact-card .big-mail{font-family:"Open Sans",sans-serif;font-weight:800;font-size:clamp(22px,3.4vw,32px);letter-spacing:-.02em;color:var(--cobalt);text-decoration:none;word-break:break-all}
.contact-card .big-mail:hover{color:var(--cobalt-deep)}
.contact-list{margin:22px 0 0;padding:0;list-style:none;color:var(--muted);font-size:15.5px}
.contact-list li{padding:12px 0;border-top:1px solid var(--hair);display:flex;gap:14px;align-items:baseline}
.contact-list .k{font-family:"Space Mono",monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--cobalt);flex:none;width:92px}

/* ---------- footer ---------- */
footer{padding:56px 0 70px;text-align:center;border-top:1px solid var(--hair)}
.foot-lock{display:inline-flex;align-items:center;gap:12px;font-family:"Open Sans",sans-serif;font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}
.foot-lock svg{width:30px;height:30px}
.foot-lock .labs{color:var(--muted);font-weight:500}
.foot-nav{display:flex;gap:22px;justify-content:center;margin-top:20px;flex-wrap:wrap}
.foot-nav a{color:var(--muted);text-decoration:none;font-size:13.5px;font-weight:500}
.foot-nav a:hover{color:var(--ink)}
.foot-meta{color:var(--muted);font-family:"Space Mono",monospace;font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-top:18px}

/* ---------- hero mark animation ---------- */
.hero-mark .modA,.hero-mark .modB,.hero-mark .modC{opacity:0;transform:translateY(14px);transform-box:fill-box;transform-origin:center;animation:rise .7s cubic-bezier(.2,.7,.2,1) forwards}
.hero-mark .modA{animation-delay:.15s}.hero-mark .modB{animation-delay:.32s}.hero-mark .modC{animation-delay:.49s}
.hero-mark .flow{stroke-dasharray:170;stroke-dashoffset:170;animation:draw .8s ease .55s forwards}
@keyframes rise{to{opacity:1;transform:translateY(0)}}
@keyframes draw{to{stroke-dashoffset:0}}
@media(prefers-reduced-motion:reduce){
  .hero-mark .modA,.hero-mark .modB,.hero-mark .modC{opacity:1;transform:none;animation:none}
  .hero-mark .flow{stroke-dashoffset:0;animation:none}
  html{scroll-behavior:auto}
}