/* ============ Cerevanta v1 — "PULSE" ============ */
:root{
  --wine:#6C2140;
  --indigo:#4A4A7A;
  --blue:#116DFF;
  --blue2:#2D7FB8;
  --teal:#0A5872;
  --ink:#0B1220;
  --ink2:#1A1F2E;
  --muted:#5F6360;
  --white:#FFFFFF;
  --gray:#F5F7FA;
  --gray2:#EEF2F7;
  --line:#E3E9F1;
  --grad:linear-gradient(120deg,#6C2140 0%,#4A4A7A 100%);
  --grad-signal:linear-gradient(120deg,#116DFF 0%,#2D7FB8 60%,#0A5872 100%);
  --shadow-sm:0 2px 8px rgba(11,18,32,.06);
  --shadow:0 16px 40px -16px rgba(11,18,32,.18);
  --shadow-lg:0 30px 70px -28px rgba(11,18,32,.28);
  --radius:18px;
  --radius-lg:26px;
  --maxw:1180px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:'Sora','Inter',sans-serif;line-height:1.12;letter-spacing:-.02em;color:var(--ink)}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

.skip-link{position:absolute;left:-999px;top:0;z-index:200;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 10px 0}
.skip-link:focus{left:0}

/* focus */
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:3px solid var(--blue);outline-offset:2px;border-radius:6px;
}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:'Inter',sans-serif;font-weight:600;font-size:1rem;
  padding:14px 26px;border-radius:999px;border:1.5px solid transparent;
  cursor:pointer;transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s;
  white-space:nowrap;
}
.btn-sm{padding:10px 20px;font-size:.94rem}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px -10px rgba(108,33,64,.6)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px -10px rgba(108,33,64,.7)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--blue);color:var(--blue)}
.btn-ghost .arrow{transition:transform .2s var(--ease)}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn-block{width:100%}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.site-header.scrolled{border-color:var(--line);box-shadow:var(--shadow-sm)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.brand-logo{height:32px;width:auto}
.nav{display:flex;gap:30px;margin-left:auto;margin-right:24px}
.nav a{font-weight:500;font-size:.96rem;color:var(--ink2);position:relative;padding:4px 0}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;background:var(--grad);transition:right .25s var(--ease)}
.nav a:hover::after{right:0}
.nav a:hover{color:var(--wine)}
.header-actions{display:flex;align-items:center;gap:14px}

.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;background:none;border:none;cursor:pointer}
.hamburger span{display:block;height:2.5px;width:24px;margin:0 auto;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease),opacity .2s}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

.mobile-menu{border-top:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
.mobile-menu nav{display:flex;flex-direction:column;padding:14px 24px 24px;gap:4px}
.mobile-menu a{padding:14px 4px;font-weight:600;font-size:1.05rem;border-bottom:1px solid var(--gray2)}
.mobile-menu a.btn{margin-top:14px;border-bottom:none;color:#fff}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:72px 0 84px}
.hero-bg{position:absolute;inset:0;z-index:0;
  background:
   radial-gradient(900px 520px at 78% 8%,rgba(17,109,255,.10),transparent 60%),
   radial-gradient(700px 520px at 10% 0%,rgba(108,33,64,.08),transparent 55%),
   linear-gradient(180deg,#fff 0%,var(--gray) 100%);}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:.82rem;letter-spacing:.04em;
  text-transform:uppercase;color:var(--indigo);background:#fff;border:1px solid var(--line);
  padding:7px 14px;border-radius:999px;box-shadow:var(--shadow-sm)}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--grad-signal);box-shadow:0 0 0 4px rgba(17,109,255,.15)}
.hero-title{font-size:clamp(2.4rem,5.6vw,4rem);font-weight:800;margin:22px 0 18px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lede{font-size:clamp(1.05rem,1.5vw,1.22rem);color:var(--muted);max-width:38ch}
.hero-ctas{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 26px}
.trust-strip{list-style:none;display:flex;flex-wrap:wrap;gap:10px 8px;align-items:center}
.trust-strip li{font-size:.82rem;font-weight:600;color:var(--teal);background:#fff;
  border:1px solid var(--line);padding:7px 13px;border-radius:999px;box-shadow:var(--shadow-sm)}
.trust-strip li::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--blue);margin-right:7px;vertical-align:middle}

/* hero visual */
.hero-visual{position:relative;display:flex;flex-direction:column;align-items:center;gap:18px}
.scanner{position:relative;width:min(360px,80vw);aspect-ratio:1;display:grid;place-items:center}
.ring{position:absolute;border-radius:50%;border:1.5px solid rgba(17,109,255,.28);inset:0}
.ring-1{inset:0;animation:pulseRing 3.4s var(--ease) infinite}
.ring-2{inset:14%;border-color:rgba(45,127,184,.3);animation:pulseRing 3.4s var(--ease) infinite .5s}
.ring-3{inset:28%;border-color:rgba(10,88,114,.32);animation:pulseRing 3.4s var(--ease) infinite 1s}
@keyframes pulseRing{0%{transform:scale(.96);opacity:.45}50%{transform:scale(1);opacity:.9}100%{transform:scale(.96);opacity:.45}}
.brain-svg{width:74%;height:auto;filter:drop-shadow(0 18px 40px rgba(74,74,122,.25))}
.sulci path{stroke-dasharray:200;stroke-dashoffset:200;animation:draw 2.6s var(--ease) forwards}
.sulci path:nth-child(2){animation-delay:.15s}
.sulci path:nth-child(3){animation-delay:.3s}
.sulci path:nth-child(4){animation-delay:.45s}
.sulci path:nth-child(5){animation-delay:.6s}
.sulci path:nth-child(6){animation-delay:.75s}
.sulci path:nth-child(7){animation-delay:.9s}
@keyframes draw{to{stroke-dashoffset:0}}
.brain-outline{stroke-dasharray:1000;stroke-dashoffset:1000;animation:draw 2.8s var(--ease) forwards}
.fn{animation:nodePulse 2s ease-in-out infinite}
.fn:nth-child(2){animation-delay:.4s}.fn:nth-child(3){animation-delay:.8s}.fn:nth-child(4){animation-delay:1.2s}
@keyframes nodePulse{0%,100%{opacity:.35;r:3}50%{opacity:1;r:4.5}}
.sweep{transform-origin:120px 120px;animation:sweep 4s linear infinite;opacity:.7}
@keyframes sweep{to{transform:rotate(360deg)}}

.wave-card{width:min(360px,86vw);background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:14px 16px;box-shadow:var(--shadow)}
.wave-head{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;margin-bottom:6px}
.live{display:inline-flex;align-items:center;gap:7px;font-weight:600;color:var(--ink2)}
.live-dot{width:8px;height:8px;border-radius:50%;background:#16a34a;box-shadow:0 0 0 0 rgba(22,163,74,.5);animation:blip 1.6s infinite}
@keyframes blip{0%{box-shadow:0 0 0 0 rgba(22,163,74,.5)}70%{box-shadow:0 0 0 7px rgba(22,163,74,0)}100%{box-shadow:0 0 0 0 rgba(22,163,74,0)}}
.wave-metric{color:var(--muted)}.wave-metric b{color:var(--blue)}
.wave-svg{width:100%;height:64px}
.wave-line{stroke-dasharray:1400;stroke-dashoffset:1400;animation:drawWave 4s linear infinite}
@keyframes drawWave{to{stroke-dashoffset:0}}

/* ============ Sections ============ */
.section{padding:88px 0}
.section-alt{background:var(--gray)}
.section-head{max-width:720px;margin:0 auto 52px;text-align:center}
.kicker{display:inline-block;font-weight:700;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--blue);margin-bottom:14px}
.kicker-wine{color:var(--wine)}
.kicker-on-dark{color:#7FB4F0}
.section-head h2{font-size:clamp(1.9rem,3.6vw,2.8rem);font-weight:700}
.section-sub{margin-top:16px;color:var(--muted);font-size:1.08rem}
.section-sub em{font-style:italic;color:var(--ink2)}

/* ============ Problem ============ */
.problem-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:center}
.countup-card{background:var(--grad);color:#fff;border-radius:var(--radius-lg);padding:44px 38px;
  box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.countup-card::after{content:"";position:absolute;right:-40px;bottom:-40px;width:200px;height:200px;
  border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.16),transparent 70%)}
.countup{font-family:'Sora',sans-serif;font-weight:800;font-size:clamp(2.8rem,6vw,4rem);line-height:1;letter-spacing:-.03em}
.countup-label{margin-top:16px;font-size:1.1rem;color:rgba(255,255,255,.9)}
.countup-label strong{color:#fff}
.problem-list{list-style:none;display:flex;flex-direction:column;gap:22px}
.problem-list li{display:flex;gap:18px;align-items:flex-start}
.pl-icon{flex:0 0 auto;width:48px;height:48px;display:grid;place-items:center;font-size:1.3rem;
  background:var(--gray);border:1px solid var(--line);border-radius:14px}
.problem-list h3{font-size:1.18rem;margin-bottom:4px}
.problem-list p{color:var(--muted)}

/* ============ Technology feature cards ============ */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;
  box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(17,109,255,.3)}
.fc-icon{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(17,109,255,.12),rgba(10,88,114,.12));color:var(--blue)}
.fc-icon svg{width:26px;height:26px}
.feature-card h3{font-size:1.22rem;margin-bottom:8px}
.feature-card p{color:var(--muted);font-size:.98rem}

/* ============ Steps ============ */
.steps{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;position:relative;box-shadow:var(--shadow-sm)}
.step-num{font-family:'Sora',sans-serif;font-weight:800;font-size:1.1rem;color:#fff;
  background:var(--grad);width:46px;height:46px;border-radius:13px;display:grid;place-items:center;margin-bottom:20px}
.step h3{font-size:1.3rem;margin-bottom:10px}
.step p{color:var(--muted)}
.step:not(:last-child)::after{content:"→";position:absolute;right:-18px;top:50%;transform:translateY(-50%);
  color:var(--blue);font-size:1.3rem;font-weight:700}

/* ============ Settings ============ */
.settings-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.setting-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;
  box-shadow:var(--shadow-sm);transition:transform .25s var(--ease),box-shadow .25s}
.setting-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.set-tag{display:inline-block;font-weight:700;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--teal);background:var(--gray2);padding:5px 11px;border-radius:999px;margin-bottom:16px}
.setting-card h3{font-size:1.2rem;margin-bottom:8px}
.setting-card p{color:var(--muted);font-size:.96rem}

/* ============ Physicians (dark) ============ */
.section-dark{background:linear-gradient(150deg,#0B1220 0%,#1A1F2E 60%,#221b2e 100%);color:#fff;position:relative;overflow:hidden}
.section-dark::before{content:"";position:absolute;inset:0;
  background:radial-gradient(700px 420px at 85% 20%,rgba(17,109,255,.18),transparent 60%),
            radial-gradient(560px 420px at 10% 90%,rgba(108,33,64,.22),transparent 60%);pointer-events:none}
.phys-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.phys-copy h2{color:#fff;font-size:clamp(1.9rem,3.4vw,2.6rem);margin-bottom:18px}
.phys-copy>p{color:rgba(255,255,255,.78);font-size:1.08rem}
.phys-list{list-style:none;margin-top:24px;display:flex;flex-direction:column;gap:14px}
.phys-list li{padding-left:30px;position:relative;color:rgba(255,255,255,.82)}
.phys-list li::before{content:"";position:absolute;left:0;top:.5em;width:13px;height:13px;border-radius:50%;
  background:var(--grad-signal);box-shadow:0 0 0 4px rgba(17,109,255,.18)}
.phys-list strong{color:#fff}
.monitor{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-lg);
  padding:24px;backdrop-filter:blur(6px);box-shadow:var(--shadow-lg)}
.monitor-head{display:flex;justify-content:space-between;font-size:.82rem;color:rgba(255,255,255,.7);margin-bottom:18px}
.monitor-head .live{color:#fff}
.monitor-readouts{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:18px}
.ro{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:14px 12px;text-align:center}
.ro span{display:block;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:rgba(255,255,255,.6)}
.ro b{font-family:'Sora',sans-serif;font-size:1.7rem;color:#7FB4F0;display:block;line-height:1.2}
.ro small{font-size:.68rem;color:rgba(255,255,255,.5)}
.monitor-wave{width:100%;height:74px}
.wave-line-2{stroke-dasharray:1500;stroke-dashoffset:1500;animation:drawWave 4s linear infinite}

/* ============ About ============ */
.about-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:52px;align-items:center}
.about-copy h2{font-size:clamp(1.9rem,3.4vw,2.6rem);margin-bottom:20px}
.lead-quote{font-family:'Sora',sans-serif;font-size:1.3rem;font-weight:500;line-height:1.4;
  color:var(--wine);border-left:4px solid;border-image:var(--grad) 1;padding-left:20px;margin-bottom:22px}
.about-copy p{color:var(--muted);margin-bottom:14px}
.about-stats{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.about-stats li{background:var(--gray);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px}
.about-stats b{font-family:'Sora',sans-serif;font-size:2.2rem;font-weight:800;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;display:block}
.about-stats span{color:var(--muted);font-size:.94rem}

/* ============ Investors ============ */
.investor-card{max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:36px 40px;display:flex;align-items:center;gap:32px;box-shadow:var(--shadow);flex-wrap:wrap;justify-content:center}
.ts-logo{height:38px;width:auto}
.investor-meta{border-left:1px solid var(--line);padding-left:32px}
.investor-meta h3{font-size:1.3rem}
.investor-meta p{color:var(--muted);font-size:.96rem;margin-top:4px}

/* ============ CTA band ============ */
.cta-band{position:relative;overflow:hidden;text-align:center;color:#fff}
.cta-bg{position:absolute;inset:0;background:var(--grad);z-index:0}
.cta-bg::after{content:"";position:absolute;inset:0;
  background:radial-gradient(600px 360px at 80% 10%,rgba(17,109,255,.4),transparent 60%)}
.cta-inner{position:relative;z-index:1;max-width:660px;margin:0 auto}
.cta-band h2{color:#fff;font-size:clamp(1.9rem,3.6vw,2.8rem)}
.cta-band>.container>p,.cta-or{color:rgba(255,255,255,.85);margin-top:14px}
.demo-form{display:flex;gap:12px;justify-content:center;margin:30px auto 0;max-width:480px;flex-wrap:wrap}
.demo-form input{flex:1 1 240px;padding:14px 18px;border-radius:999px;border:1.5px solid rgba(255,255,255,.35);
  background:rgba(255,255,255,.12);color:#fff;font-size:1rem;font-family:inherit}
.demo-form input::placeholder{color:rgba(255,255,255,.7)}
.demo-form input:focus{background:rgba(255,255,255,.2);outline-color:#fff}
.demo-form .btn-primary{background:#fff;color:var(--wine);box-shadow:0 10px 24px -8px rgba(0,0,0,.4)}
.demo-form .btn-primary:hover{background:#fff}
.cta-or{margin-top:22px}
.cta-or a{color:#fff;text-decoration:underline;text-underline-offset:3px;font-weight:600}

/* ============ Footer ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand img{height:30px;width:auto;background:#fff;padding:7px 12px;border-radius:10px;margin-bottom:16px}
.footer-brand p{max-width:34ch;font-size:.96rem}
.footer-nav h4,.footer-contact h4{color:#fff;font-family:'Sora',sans-serif;font-size:.92rem;letter-spacing:.04em;margin-bottom:14px}
.footer-nav a,.footer-contact a{display:block;padding:6px 0;font-size:.96rem;transition:color .2s}
.footer-nav a:hover,.footer-contact a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:24px;font-size:.86rem;color:rgba(255,255,255,.5)}

/* ============ Toast ============ */
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:14px 24px;border-radius:14px;font-weight:600;
  box-shadow:var(--shadow-lg);z-index:300;opacity:0;transition:opacity .3s,transform .3s;display:flex;align-items:center;gap:10px}
.toast::before{content:"✓";display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--grad-signal);font-size:.8rem}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ Responsive ============ */
@media (max-width:980px){
  .hero-grid,.phys-grid,.about-grid,.problem-grid{grid-template-columns:1fr;gap:42px}
  .hero-visual{order:-1}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .settings-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .step:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-20px;transform:translateX(-50%)}
}
@media (max-width:760px){
  .nav,.header-cta{display:none}
  .hamburger{display:flex}
  .section{padding:64px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .investor-meta{border-left:none;border-top:1px solid var(--line);padding-left:0;padding-top:20px;text-align:center}
}
@media (max-width:520px){
  .feature-grid,.settings-grid,.about-stats{grid-template-columns:1fr}
  .container{padding:0 18px}
  .countup-card{padding:34px 26px}
}