/* ── Reset & Tokens ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --d:#0F5B63;--m:#2A7D84;--l:#4A9BA3;--mint:#8ED9D2;
  --pale:#F6FCFB;--bg:#fff;--dark:#0D2B2E;
  --body:#3D5F63;--muted:#7A9FA4;
  --bdr:rgba(15,91,99,.12);
  --sh1:0 2px 12px rgba(15,91,99,.08);
  --sh2:0 8px 32px rgba(15,91,99,.14);
  --sh3:0 16px 48px rgba(15,91,99,.18);
  --r:12px
}
html{scroll-behavior:smooth}
body{font-family:'Open Sans',sans-serif;color:var(--dark);background:var(--bg);overflow-x:hidden;line-height:1.65}
h1,h2,h3,h4{font-family:'Poppins',sans-serif;line-height:1.15}
h1{font-size:clamp(2.1rem,5vw,3.5rem);font-weight:800;letter-spacing:-.02em}
h2{font-size:clamp(1.7rem,3.5vw,2.5rem);font-weight:700;letter-spacing:-.015em}
h3{font-size:1.08rem;font-weight:600}
p{color:var(--body)}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:8px;font-family:'Open Sans',sans-serif;font-size:.93rem;font-weight:600;text-decoration:none;cursor:pointer;border:none;transition:all .22s ease;line-height:1}
.btn-p{background:var(--d);color:#fff;box-shadow:0 4px 16px rgba(15,91,99,.25)}
.btn-p:hover{background:var(--m);transform:translateY(-1px);box-shadow:0 6px 24px rgba(15,91,99,.32)}
.btn-o{background:transparent;color:var(--d);border:1.5px solid var(--d)}
.btn-o:hover{background:rgba(15,91,99,.06);transform:translateY(-1px)}

/* ── Nav ── */
nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;height:68px;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--bdr)}
.nav-logo{display:flex;align-items:center;text-decoration:none}
.nav-logo img{height:40px;width:auto;object-fit:contain}
.nav-links{display:flex;gap:28px}
.nav-links a{text-decoration:none;color:var(--body);font-size:.88rem;font-weight:500;transition:color .18s;font-family:'Poppins',sans-serif;letter-spacing:.01em}
.nav-links a:hover,.nav-links a.active{color:var(--d)}
.nav-cta{display:flex;gap:10px;align-items:center}

/* ── Layout helpers ── */
section{padding:88px 5vw}
.sec-label{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--m);margin-bottom:10px;font-family:'Open Sans',sans-serif}
.sec-hdr{max-width:580px;margin-bottom:48px}
.sec-hdr h2{margin-bottom:12px}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* ── EEG Divider ── */
.eeg-div{width:100%;height:40px;overflow:hidden;display:block}
.eeg-div svg{width:100%;height:40px;display:block}

/* ── Inner-page hero ── */
.page-hero{padding:120px 5vw 64px;background:radial-gradient(ellipse 80% 70% at 30% 50%,rgba(142,217,210,.09) 0%,transparent 70%)}
.page-hero .sec-label{margin-bottom:14px}
.page-hero h1{margin-bottom:18px;max-width:640px}
.page-hero p{font-size:1.08rem;max-width:560px}

/* ── Problem section ── */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.problem-bullets{list-style:none;margin-top:28px}
.problem-bullets li{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px;font-size:.97rem;color:var(--body);line-height:1.55}
.x-ic{flex-shrink:0;margin-top:1px}

/* ── Solution flowchart ── */
.flow-wrap{display:flex;flex-direction:column;align-items:center;max-width:520px;margin:0 auto}
.flow-box{width:100%;background:var(--bg);border:1.5px solid var(--bdr);border-radius:var(--r);padding:20px 28px;display:flex;align-items:center;gap:18px;box-shadow:var(--sh1);transition:all .22s;position:relative}
.flow-box:hover{border-color:var(--m);box-shadow:var(--sh2);transform:translateX(4px)}
.flow-num{width:38px;height:38px;background:var(--d);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'Poppins',sans-serif;font-size:.88rem;font-weight:700;flex-shrink:0}
.flow-box h3{font-size:1rem;margin-bottom:2px}
.flow-box p{font-size:.85rem;margin:0}
.flow-arrow{height:28px;display:flex;align-items:center;justify-content:center}
.flow-arrow svg{stroke:var(--mint);stroke-width:2;fill:none}

/* ── Features 3×2 grid ── */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat-card{background:var(--bg);border:1px solid var(--bdr);border-radius:var(--r);padding:28px 24px;box-shadow:var(--sh1);transition:all .25s;position:relative;overflow:hidden}
.feat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--d),var(--mint));opacity:0;transition:opacity .25s}
.feat-card:hover{transform:translateY(-5px);box-shadow:var(--sh3);border-color:var(--m)}
.feat-card:hover::before{opacity:1}
.feat-icon{width:44px;height:44px;margin-bottom:18px;display:flex;align-items:center;justify-content:center;background:rgba(15,91,99,.06);border-radius:10px}
.feat-icon svg{width:22px;height:22px;stroke:var(--d);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.feat-card h3{margin-bottom:8px}
.feat-card p{font-size:.89rem;line-height:1.65}

/* ── How It Works steps ── */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.steps::before{content:'';position:absolute;top:27px;left:10%;right:10%;height:1.5px;background:linear-gradient(90deg,transparent,var(--mint),var(--m),var(--mint),transparent)}
.step{text-align:center;padding:0 12px}
.step-n{width:56px;height:56px;margin:0 auto 18px;background:var(--d);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:'Poppins',sans-serif;font-size:1.2rem;font-weight:700;position:relative;z-index:1;box-shadow:0 0 0 8px rgba(15,91,99,.1)}
.step p{font-size:.88rem}

/* ── Why Synaptix ── */
#why{background:var(--d);padding:72px 5vw}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;text-align:center}
.why-before{font-size:.78rem;color:rgba(255,255,255,.5);font-weight:500;margin-bottom:2px;font-family:'Open Sans',sans-serif}
.why-arr{color:var(--mint);font-size:1.4rem;margin:5px 0;line-height:1}
.why-after{font-family:'Poppins',sans-serif;font-size:2.6rem;font-weight:800;color:var(--mint);line-height:1;margin-bottom:6px}
.why-label{color:rgba(255,255,255,.65);font-size:.88rem;font-family:'Open Sans',sans-serif}

/* ── Demo form ── */
#demo{background:var(--pale)}
.demo-inner{max-width:640px;margin:0 auto}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ff{display:flex;flex-direction:column;gap:6px}
.ff.full{grid-column:1/-1}
label{font-size:.82rem;font-weight:600;color:var(--d);font-family:'Open Sans',sans-serif}
input,select,textarea{font-family:'Open Sans',sans-serif;font-size:.92rem;padding:11px 14px;border:1.5px solid var(--bdr);border-radius:8px;background:var(--bg);color:var(--dark);outline:none;transition:border-color .18s;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--m)}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237A9FA4' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
textarea{resize:vertical;min-height:110px;line-height:1.6}
.thanks{display:none;text-align:center;padding:48px 32px;background:rgba(142,217,210,.12);border:1.5px solid rgba(142,217,210,.35);border-radius:var(--r)}
.thanks h3{color:var(--d);margin-bottom:8px;font-size:1.4rem}
.thanks p{margin:0}
.check-circle{width:56px;height:56px;background:var(--d);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 20px}
.check-circle svg{stroke:#fff;fill:none;stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}

/* ── Team ── */
#team{background:var(--bg)}
.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.team-card{background:var(--bg);border:1px solid var(--bdr);border-radius:var(--r);padding:32px 24px;text-align:center;box-shadow:var(--sh1);transition:all .25s}
.team-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:var(--l)}
.avatar{width:76px;height:76px;border-radius:50%;background:linear-gradient(135deg,var(--d),var(--mint));display:flex;align-items:center;justify-content:center;color:#fff;font-family:'Poppins',sans-serif;font-size:1.4rem;font-weight:700;margin:0 auto 16px;box-shadow:0 4px 16px rgba(15,91,99,.2)}
.avatar-photo{width:96px;height:96px;border-radius:50%;object-fit:cover;object-position:center top;display:block;margin:0 auto 16px;box-shadow:0 4px 20px rgba(15,91,99,.18);border:3px solid var(--pale)}
.team-card h3{margin-bottom:3px}
.team-school{font-size:.8rem;color:var(--m);font-weight:600;margin-bottom:3px;font-family:'Open Sans',sans-serif}
.team-role{font-size:.85rem;color:var(--muted);margin-bottom:16px}
.team-links{display:flex;gap:8px;justify-content:center}
.tl{display:flex;align-items:center;gap:5px;text-decoration:none;color:var(--m);font-size:.78rem;font-weight:600;padding:6px 10px;border:1px solid var(--bdr);border-radius:6px;transition:all .18s;font-family:'Open Sans',sans-serif}
.tl:hover{background:var(--d);color:#fff;border-color:var(--d)}
.tl svg{width:12px;height:12px}

/* ── FAQ ── */
#faq{background:var(--pale)}
.faq-list{max-width:720px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--bdr)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;padding:20px 0;background:none;border:none;cursor:pointer;font-family:'Poppins',sans-serif;font-size:1rem;font-weight:600;color:var(--dark);text-align:left;gap:16px}
.faq-icon{flex-shrink:0;width:22px;height:22px;border:1.5px solid var(--bdr);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .25s}
.faq-q.open .faq-icon{background:var(--d);border-color:var(--d)}
.faq-icon::after{content:'+';color:var(--d);font-size:14px;line-height:1;transition:all .25s}
.faq-q.open .faq-icon::after{content:'−';color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease}
.faq-a p{padding-bottom:20px;font-size:.93rem;line-height:1.75}

/* ── Footer ── */
footer{background:var(--dark);color:rgba(255,255,255,.5);padding:56px 5vw 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand img{height:36px;filter:brightness(0) invert(1);margin-bottom:14px;opacity:.85}
.footer-brand p{font-size:.85rem;line-height:1.75;max-width:240px}
.footer-col h4{color:#fff;font-family:'Poppins',sans-serif;font-size:.8rem;font-weight:600;letter-spacing:.07em;text-transform:uppercase;margin-bottom:14px}
.footer-col a{display:block;color:rgba(255,255,255,.5);text-decoration:none;font-size:.85rem;margin-bottom:9px;transition:color .18s}
.footer-col a:hover{color:var(--mint)}
.footer-bot{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:.8rem;flex-wrap:wrap;gap:8px}

/* ── Simple page content ── */
.page-content{max-width:820px;margin:0 auto;padding:40px 0}
.page-content h2{margin-bottom:16px;color:var(--dark)}
.page-content h3{margin:28px 0 10px;color:var(--d)}
.page-content p,.page-content li{font-size:.96rem;line-height:1.8;color:var(--body)}
.page-content ul,.page-content ol{padding-left:22px;margin-bottom:16px}
.page-content li{margin-bottom:8px}

/* ── Responsive ── */
@media(max-width:960px){
  #hero{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr;gap:40px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .why-grid{grid-template-columns:repeat(3,1fr)}
  .team-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .nav-links{display:none}
}
@media(max-width:620px){
  .feat-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .team-grid{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr;gap:24px}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  section{padding:64px 5vw}
}