/* ============================================================
   PRISMA — premium landing page
   Palette drawn from brand mark:
   ink      #0E131F  (deep navy)
   red      #E0533C
   amber    #E89E3B
   sky      #4CA0E6
   violet   #5C76F1
   ============================================================ */

:root{
  /* Official Prisma design tokens (prisma-logo.css) */
  --ink:#0B0F1A;
  --ink-soft:#3A4152;
  --ink-mute:#6b6a63;
  --paper:#F6F4EF;          /* brand paper — warm, not "cheap tech" white */
  --paper-2:#EEEBE2;
  --line:rgba(11,15,26,.10);
  --red:#E5484D;            /* prisma-magenta */
  --amber:#F2A63B;
  --sky:#3AA6F2;            /* prisma-cyan */
  --violet:#7C5CFF;
  --grad:linear-gradient(90deg,var(--red) 0%,var(--amber) 33%,var(--sky) 66%,var(--violet) 100%);
  --font-display:'Space Grotesk',system-ui,sans-serif;
  --font-body:'Inter',sans-serif;
  --radius:20px;
  --shadow-soft:0 1px 2px rgba(14,19,31,.05),0 12px 40px -12px rgba(14,19,31,.12);
  --shadow-lift:0 2px 4px rgba(14,19,31,.06),0 24px 60px -16px rgba(14,19,31,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  font-size:16px;line-height:1.65;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
em{font-style:normal}

.container{width:min(1160px,92%);margin-inline:auto}

/* ---------- typography ---------- */
.eyebrow{
  font-family:var(--font-display);
  font-size:.78rem;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-mute);
  margin-bottom:1.1rem;
}
.eyebrow::before{
  content:"";display:inline-block;width:26px;height:3px;border-radius:2px;
  background:var(--grad);margin-right:.7rem;vertical-align:middle;
}
.eyebrow-light{color:rgba(255,255,255,.55)}

.section-title{
  font-family:var(--font-display);
  font-size:clamp(1.9rem,4vw,2.9rem);
  font-weight:600;line-height:1.14;
  letter-spacing:-.025em;
}
.title-light{color:#fff}
.section-sub{
  margin-top:1.1rem;
  font-size:clamp(1rem,1.4vw,1.15rem);
  color:var(--ink-soft);
  max-width:56ch;
}
.section-head{max-width:720px;margin:0 auto 3.6rem;text-align:center}
.section-head .section-sub{margin-inline:auto}
.section-head-left{margin:0 0 3rem;text-align:left}

.gradient-text{
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-weight:600;font-size:.95rem;
  padding:.95rem 1.9rem;border-radius:999px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s;
  cursor:pointer;border:none;
}
.btn-primary{
  color:#fff;background:var(--ink);
  position:relative;isolation:isolate;overflow:hidden;
  box-shadow:0 10px 30px -10px rgba(14,19,31,.45);
}
.btn-primary::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:var(--grad);opacity:0;transition:opacity .3s var(--ease);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px -10px rgba(92,118,241,.5)}
.btn-primary:hover::after{opacity:1}
.btn-ghost{
  color:var(--ink);background:transparent;
  box-shadow:inset 0 0 0 1.5px var(--line);
}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:inset 0 0 0 1.5px rgba(14,19,31,.3)}
.btn-sm{padding:.62rem 1.35rem;font-size:.85rem}
.btn-block{width:100%}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset:0 0 auto;z-index:50;
  transition:background .3s,box-shadow .3s,backdrop-filter .3s;
}
.site-header.is-scrolled,
.site-header.is-menu-open{
  background:rgba(246,244,239,.92);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:0 1px 0 var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:2rem;
  padding:1rem 0;
}
.brand-wordmark{height:34px;width:auto}
.main-nav{display:flex;gap:1.9rem;margin-inline:auto}
.main-nav a{
  font-size:.92rem;font-weight:500;color:var(--ink-soft);
  position:relative;padding:.2rem 0;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;
  background:var(--grad);border-radius:2px;transition:width .3s var(--ease);
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:1rem}

.lang-toggle{
  display:flex;border-radius:999px;padding:3px;
  background:rgba(14,19,31,.06);
}
.lang-btn{
  border:none;background:transparent;cursor:pointer;
  font-family:var(--font-display);font-size:.75rem;font-weight:600;
  letter-spacing:.06em;color:var(--ink-mute);
  padding:.35rem .7rem;border-radius:999px;
  transition:all .25s var(--ease);
}
.lang-btn.is-active{background:var(--ink);color:#fff}

/* hamburger (mobile only) */
.menu-toggle{
  display:none;
  flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;
  background:transparent;border:none;cursor:pointer;
  border-radius:10px;
  padding:0 9px;
}
.menu-bar{
  display:block;height:2px;width:100%;border-radius:2px;
  background:var(--ink);
  transition:transform .3s var(--ease),opacity .2s;
}
.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* mobile slide-down menu */
.mobile-menu{
  display:none;
  flex-direction:column;gap:.2rem;
  padding:.8rem 4% 1.4rem;
  background:rgba(246,244,239,.97);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 24px 48px -20px rgba(11,15,26,.18);
}
.mobile-menu.is-open{display:flex}
.mobile-menu a{
  font-family:var(--font-display);font-weight:600;font-size:1.05rem;
  color:var(--ink);
  padding:.85rem .4rem;
  border-bottom:1px solid var(--line);
}
.mobile-menu a:last-of-type{border-bottom:none}
.mobile-menu-cta{
  margin-top:.8rem;text-align:center;
  color:#fff !important;
  border-bottom:none !important;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:9.5rem 0 6rem;
  overflow:hidden;
}
.hero-light{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(52% 42% at 78% 30%,rgba(92,118,241,.10),transparent 70%),
    radial-gradient(40% 36% at 68% 68%,rgba(76,160,230,.10),transparent 70%),
    radial-gradient(34% 30% at 84% 14%,rgba(224,83,60,.08),transparent 70%),
    radial-gradient(30% 26% at 60% 20%,rgba(232,158,59,.07),transparent 70%);
}
.hero-inner{
  position:relative;
  display:grid;grid-template-columns:1.05fr .95fr;
  gap:3rem;align-items:center;
}
.hero-title{
  font-family:var(--font-display);
  font-size:clamp(2.6rem,5.4vw,4.2rem);
  font-weight:700;line-height:1.06;letter-spacing:-.028em;
}
.hero-sub{
  margin-top:1.5rem;font-size:clamp(1.05rem,1.5vw,1.2rem);
  color:var(--ink-soft);max-width:50ch;
}
.hero-cta{margin-top:2.3rem;display:flex;gap:1rem;flex-wrap:wrap}
.hero-note{margin-top:1.4rem;font-size:.88rem;color:var(--ink-mute)}

/* prism visual */
.hero-visual{position:relative}
.prism-scene{display:flex;align-items:stretch;gap:.4rem}
.prism-svg{flex:1;min-width:0;width:100%;height:auto;filter:drop-shadow(0 24px 48px rgba(14,19,31,.10))}

/* incoming signal lines */
.in-lines{opacity:.85}
.in-line{
  stroke-dasharray:6 8;
  animation:lineFlow 2.6s linear infinite;
}
.line-beh{animation-delay:-.6s}
.line-ide{animation-delay:-1.2s}
.line-fin{animation-delay:-1.8s}
@keyframes lineFlow{
  to{stroke-dashoffset:-28}
}

.rays .ray{transform-origin:322px 210px;animation:rayPulse 6s var(--ease) infinite}
.ray-b{animation-delay:1.2s}
.ray-c{animation-delay:2.4s}
.ray-d{animation-delay:3.6s}
@keyframes rayPulse{
  0%,100%{opacity:.75}
  50%{opacity:1}
}
.prism-shape{animation:prismFloat 9s ease-in-out infinite}
@keyframes prismFloat{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-8px)}
}

.signal-chips{
  position:relative;
  width:132px;flex-shrink:0;
  font-family:var(--font-display);
  pointer-events:none;
}
.chip{
  position:absolute;left:0;transform:translateY(-50%);
  display:flex;align-items:center;white-space:nowrap;
  font-size:.72rem;font-weight:600;letter-spacing:.04em;
  color:var(--ink-soft);
  background:rgba(255,255,255,.86);
  border:1px solid var(--line);
  border-radius:999px;padding:.32rem .8rem;
  box-shadow:var(--shadow-soft);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  animation:chipDrift 7s ease-in-out infinite;
}
.chip::before{
  content:"";display:inline-block;width:7px;height:7px;border-radius:50%;
  margin-right:.45rem;flex-shrink:0;
}
/* tops match the y-origins of the SVG signal lines (84/166/254/336 of 420) */
.chip-1{top:20%;animation-delay:0s}
.chip-1::before{background:var(--red)}
.chip-2{top:39.5%;animation-delay:1.6s}
.chip-2::before{background:var(--amber)}
.chip-3{top:60.5%;animation-delay:3.2s}
.chip-3::before{background:var(--sky)}
.chip-4{top:80%;animation-delay:4.8s}
.chip-4::before{background:var(--violet)}
@keyframes chipDrift{
  0%,100%{transform:translateY(-50%)}
  50%{transform:translateY(calc(-50% - 4px))}
}

.decision-card{
  position:absolute;right:0;bottom:-4%;
  display:flex;align-items:center;gap:.6rem;
  background:rgba(255,255,255,.92);
  border:1px solid var(--line);border-radius:16px;
  padding:.8rem 1.2rem;
  box-shadow:var(--shadow-lift);
  font-family:var(--font-display);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.decision-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--grad);
  box-shadow:0 0 0 4px rgba(92,118,241,.15);
}
.decision-label{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-mute)}
.decision-value{font-size:1.05rem;font-weight:700}

/* ---------- problem ---------- */
.problem{padding:6.5rem 0;background:var(--paper-2)}
.problem-inner{
  display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center;
}
.problem-stats{display:flex;flex-direction:column;gap:1.6rem}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem 1.7rem;box-shadow:var(--shadow-soft);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
.stat-bar{display:block;width:44px;height:4px;border-radius:2px;margin-bottom:1rem}
.bar-a{background:linear-gradient(90deg,var(--red),var(--amber))}
.bar-b{background:linear-gradient(90deg,var(--amber),var(--sky))}
.bar-c{background:linear-gradient(90deg,var(--sky),var(--violet))}
.stat-figure{font-family:var(--font-display);font-size:1.15rem;font-weight:600;display:block}
.stat-caption{display:block;margin-top:.35rem;font-size:.95rem;color:var(--ink-soft)}

/* ---------- how ---------- */
.how{padding:7rem 0}
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem;
  counter-reset:step;
}
.step{
  position:relative;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:2.2rem 2rem 2.4rem;
  box-shadow:var(--shadow-soft);
  overflow:hidden;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow-lift)}
.step-num{
  font-family:var(--font-display);font-size:.8rem;font-weight:600;
  letter-spacing:.14em;color:var(--ink-mute);
}
.step-beam{
  position:absolute;top:0;left:0;right:0;height:4px;
}
.beam-a{background:linear-gradient(90deg,var(--red),var(--amber))}
.beam-b{background:linear-gradient(90deg,var(--amber),var(--sky))}
.beam-c{background:linear-gradient(90deg,var(--sky),var(--violet))}
.step-title{
  font-family:var(--font-display);font-size:1.4rem;font-weight:600;
  margin:.9rem 0 .6rem;
}
.step-text{color:var(--ink-soft);font-size:.98rem}

/* ---------- under the hood (tech strip) ---------- */
.tech-strip{
  margin-top:3.2rem;
  border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(255,255,255,.55);
  display:grid;grid-template-columns:repeat(3,1fr);
  overflow:hidden;
}
.tech-item{
  padding:1.7rem 1.8rem;
  border-left:1px solid var(--line);
}
.tech-item:first-child{border-left:none}
.tech-item h3{
  font-family:var(--font-display);font-size:1rem;font-weight:600;
  margin-bottom:.4rem;
}
.tech-item h3::before{
  content:"";display:inline-block;width:8px;height:8px;border-radius:50%;
  background:var(--grad);margin-right:.55rem;
}
.tech-item p{font-size:.9rem;color:var(--ink-soft)}

/* ---------- signals ---------- */
.signals{padding:7rem 0;background:var(--paper-2)}
.signal-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem;
}
.signal-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.9rem 1.7rem 2.1rem;
  box-shadow:var(--shadow-soft);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.signal-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lift)}
.signal-swatch{display:block;width:40px;height:40px;border-radius:12px;margin-bottom:1.2rem}
.card-psy .signal-swatch{background:linear-gradient(135deg,var(--red),#f08a6f)}
.card-beh .signal-swatch{background:linear-gradient(135deg,var(--amber),#f2c078)}
.card-ide .signal-swatch{background:linear-gradient(135deg,var(--sky),#8cc3f0)}
.card-fin .signal-swatch{background:linear-gradient(135deg,var(--violet),#93a5f6)}
.signal-card h3{font-family:var(--font-display);font-size:1.18rem;font-weight:600}
.signal-q{
  margin:.4rem 0 .7rem;font-size:.9rem;font-weight:600;
  color:var(--ink-mute);font-style:italic;
}
.signal-card p:last-child{font-size:.93rem;color:var(--ink-soft)}

/* ---------- who ---------- */
.who{padding:7rem 0}
.who-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:4rem;align-items:start}
.who-list{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem}
.who-item{
  border-top:1px solid var(--line);
  padding-top:1.3rem;
  transition:border-color .3s;
}
.who-item h3{
  font-family:var(--font-display);font-size:1.12rem;font-weight:600;
  margin-bottom:.45rem;
}
.who-item h3::before{
  content:"";display:inline-block;width:8px;height:8px;border-radius:2px;
  background:var(--grad);margin-right:.6rem;transform:rotate(45deg);
}
.who-item p{font-size:.94rem;color:var(--ink-soft)}

/* ---------- why (dark) ---------- */
.why{
  position:relative;padding:7.5rem 0;
  background:var(--ink);color:#fff;overflow:hidden;
}
.why-glow{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(46% 40% at 18% 18%,rgba(224,83,60,.14),transparent 70%),
    radial-gradient(44% 40% at 82% 24%,rgba(92,118,241,.16),transparent 70%),
    radial-gradient(40% 36% at 50% 90%,rgba(76,160,230,.12),transparent 70%);
}
.why .container{position:relative}
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.why-card{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.09);
  border-radius:var(--radius);
  padding:2rem 1.9rem;
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
  transition:background .3s,transform .3s var(--ease);
}
.why-card:hover{background:rgba(255,255,255,.075);transform:translateY(-4px)}
.why-line{display:block;width:44px;height:3px;border-radius:2px;margin-bottom:1.2rem}
.line-a{background:var(--red)}
.line-b{background:var(--amber)}
.line-c{background:var(--sky)}
.line-d{background:var(--violet)}
.why-card h3{font-family:var(--font-display);font-size:1.2rem;font-weight:600;margin-bottom:.55rem}
.why-card p{font-size:.95rem;color:rgba(255,255,255,.68)}
.why-quote{margin-top:4rem;text-align:center}
.quote-text{
  font-family:var(--font-display);
  font-size:clamp(1.25rem,2.4vw,1.7rem);
  font-weight:500;line-height:1.4;
  max-width:34ch;margin-inline:auto;
  background:linear-gradient(90deg,#f5b8ba,#f8d9ac 33%,#b3d9f8 66%,#cabdff);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ---------- contact ---------- */
.contact{padding:7.5rem 0;position:relative;overflow:hidden}
.contact::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(44% 40% at 12% 30%,rgba(232,158,59,.08),transparent 70%),
    radial-gradient(44% 40% at 88% 74%,rgba(92,118,241,.09),transparent 70%);
}
.contact-inner{
  position:relative;
  display:grid;grid-template-columns:1fr 1fr;gap:4.5rem;align-items:center;
}
.contact-points{margin-top:1.8rem;display:flex;flex-direction:column;gap:.75rem}
.contact-points li{
  position:relative;padding-left:1.7rem;color:var(--ink-soft);font-size:.98rem;
}
.contact-points li::before{
  content:"";position:absolute;left:0;top:.42em;
  width:12px;height:12px;border-radius:4px;
  background:var(--grad);transform:rotate(45deg) scale(.8);
}
.demo-form{
  background:#fff;border:1px solid var(--line);border-radius:24px;
  padding:2.4rem;box-shadow:var(--shadow-lift);
}
.form-row{margin-bottom:1.25rem}
.form-row label{
  display:block;font-family:var(--font-display);
  font-size:.82rem;font-weight:600;letter-spacing:.02em;
  margin-bottom:.45rem;
}
.optional{color:var(--ink-mute);font-weight:450}
.form-row input,.form-row textarea{
  width:100%;font-family:var(--font-body);font-size:.96rem;color:var(--ink);
  background:var(--paper);
  border:1.5px solid var(--line);border-radius:12px;
  padding:.85rem 1rem;
  transition:border-color .25s,box-shadow .25s;
  resize:vertical;
}
.form-row input:focus,.form-row textarea:focus{
  outline:none;border-color:var(--violet);
  box-shadow:0 0 0 4px rgba(92,118,241,.14);
}
.form-status{margin-top:1rem;font-size:.9rem;min-height:1.4em;text-align:center}
.form-status.ok{color:#1e7f4f}
.form-status.err{color:var(--red)}
.form-mail-link{color:var(--violet);font-weight:600;text-decoration:underline}
.form-mail-link:hover{color:var(--ink)}

/* ---------- footer ---------- */
.site-footer{background:var(--paper-2);padding-top:4.5rem;position:relative}
.footer-inner{display:flex;flex-direction:column;gap:2.2rem;padding-bottom:2.6rem}
.footer-wordmark{height:30px;width:auto}
.footer-tag{margin-top:.8rem;font-size:.92rem;color:var(--ink-mute)}
.footer-nav{display:flex;gap:1.8rem;flex-wrap:wrap}
.footer-nav a{font-size:.9rem;color:var(--ink-soft)}
.footer-nav a:hover{color:var(--ink)}
.footer-legal{font-size:.82rem;color:var(--ink-mute)}
.footer-spectrum{height:5px;background:var(--grad)}

/* ---------- reveal on scroll ---------- */
.reveal{
  opacity:0;transform:translateY(26px);
  transition:opacity .8s var(--ease),transform .8s var(--ease);
}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .rays .ray,.prism-shape,.chip,.in-line{animation:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .hero-inner{grid-template-columns:1fr;gap:3.5rem}
  .hero-visual{max-width:560px;margin-inline:auto;width:100%}
  .problem-inner,.who-inner,.contact-inner{grid-template-columns:1fr;gap:3rem}
  .steps{grid-template-columns:1fr}
  .tech-strip{grid-template-columns:1fr}
  .tech-item{border-left:none;border-top:1px solid var(--line)}
  .tech-item:first-child{border-top:none}
  .signal-grid{grid-template-columns:1fr 1fr}
  .why-grid{grid-template-columns:1fr}
  .main-nav{display:none}
  .menu-toggle{display:flex}
}
@media (max-width:600px){
  .hero{padding-top:7.5rem}
  .signal-grid,.who-list{grid-template-columns:1fr}
  .demo-form{padding:1.8rem 1.4rem}
  .brand-wordmark{height:28px}
  .header-inner{gap:1rem}
  .header-actions .btn-sm{display:none}
  .decision-card{right:2%;bottom:-2%;padding:.6rem .9rem}
  .decision-value{font-size:.92rem}
  .chip{font-size:.6rem;padding:.26rem .6rem}
  .signal-chips{width:104px}
  .prism-scene{gap:.2rem}
}