/* ============================================================
   AquaSense — simplified design system
   Palette: slate ink + teal accent + cream paper
   ============================================================ */
:root{
  --ink:#16213A;
  --ink-2:#1F2E4D;
  --bg-deep:#1C2A4A;      /* original #16213A, lightened very slightly */
  --bg-deep-2:#26375A;    /* original #1F2E4D, lightened very slightly */
  --teal:#F5A524;
  --teal-dark:#DB8E12;
  --teal:#2BB3A3;
  --coral:#EF5F52;
  --cream:#FAF6EE;
  --cream-2:#F1EADA;
  --white:#FFFFFF;
  --text:#1E2433;
  --text-soft:#5B6472;
  --line:rgba(22,33,58,.12);
  --line-dark:rgba(255,255,255,.14);
  --coral-500:#FF6E5E;
  --teal-500:#12A6A0;

  --font-display:'Space Grotesk','Segoe UI',sans-serif;
  --font-body:'Inter','Segoe UI',sans-serif;

  --maxw:1120px;
  --radius:12px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--text);
  background:var(--white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{font-family:var(--font-display);margin:0;line-height:1.15;letter-spacing:-.01em;}
p{margin:0;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
:focus-visible{outline:2.5px solid var(--teal);outline-offset:3px;}

/* ---------- reusable bits ---------- */
.eyebrow{
  font-family:var(--font-body);
  font-size:12.5px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;
  color:var( --teal-500);
  display:inline-flex;align-items:center;gap:8px;
}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:2px;background:var(--teal);}
.eyebrow.on-dark{color:var( --teal);}

.section{padding:76px 0;}
.section-head{max-width:600px;margin-bottom:40px;}
.section-head h2{font-size:clamp(26px,3.2vw,36px);margin-top:10px;color:var(--ink);}
.section-head p{margin-top:12px;color:var(--text-soft);font-size:16px;}
.section-head.on-dark h2{color:var(--white);}
.section-head.on-dark p{color:rgba(255,255,255,.72);}

.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-weight:600;font-size:15px;
  padding:12px 22px;border-radius:8px;border:1.5px solid transparent;
  cursor:pointer;transition:background .15s ease, border-color .15s ease, color .15s ease;
}
.btn svg{width:16px;height:16px;flex:none;}
.btn-primary{background:var(--teal);color:var(--ink);}
.btn-primary:hover{background:var(--teal-dark);}
.btn-outline-light{border-color:var(--line-dark);color:var(--white);}
.btn-outline-light:hover{border-color:var(--teal);color:var(--teal);}
.btn-outline{border-color:var(--line);color:var(--ink);}
.btn-outline:hover{border-color:var(--ink);}

/* ============================================================
   NAV
   ============================================================ */
.site-nav{
  position:sticky;top:0;z-index:50;
  background:var(--bg-deep);
  border-bottom:1px solid var(--line-dark);
}
.site-nav .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--white);}
.brand-mark{
  width:32px;height:32px;border-radius:8px;background:var(--teal);
  display:flex;align-items:center;justify-content:center;flex:none;
}
.brand-mark svg{width:18px;height:18px;color:var(--ink);}
.brand-text{font-family:var(--font-display);font-weight:600;font-size:16px;}

.nav-links{display:flex;align-items:center;gap:2px;}
.nav-links a{
  color:rgba(255,255,255,.75);font-size:14.5px;font-weight:500;
  padding:9px 13px;border-radius:6px;
  transition:background .15s ease,color .15s ease;
}
.nav-links a:hover{color:var(--white);background:rgba(255,255,255,.06);}
.nav-links a.active{color:var(--ink);background:var(--teal);}
.nav-toggle{display:none;background:none;border:none;color:var(--white);cursor:pointer;padding:6px;}
.nav-toggle svg{width:24px;height:24px;}

/* ============================================================
   HOME HERO
   ============================================================ */
.hero{background:var(--bg-deep);color:var(--white);padding:72px 0 88px;}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.hero-copy h1{font-size:clamp(32px,4.2vw,50px);margin-top:16px;color:var(--white);}
.hero-copy h1 em{font-style:normal;color:var(--teal);}
.hero-copy p.lead{margin-top:18px;font-size:17px;color:rgba(255,255,255,.75);max-width:500px;}
.hero-actions{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap;}
.hero-meta{display:flex;gap:26px;margin-top:38px;padding-top:24px;border-top:1px solid var(--line-dark);flex-wrap:wrap;}
.hero-meta .stat b{display:block;font-family:var(--font-display);font-size:22px;color:var(--teal);}
.hero-meta .stat span{font-size:12.5px;color:rgba(255,255,255,.6);}

/* simplified dashboard card */
.dash{
  background:var(--bg-deep-2);
  border:1px solid var(--line-dark);
  border-radius:16px;padding:20px 20px 22px;
}
.dash-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.dash-title{font-size:11.5px;letter-spacing:.1em;color:rgba(255,255,255,.55);text-transform:uppercase;font-weight:600;}
.dash-dot{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--teal);font-weight:600;}
.dash-dot i{width:7px;height:7px;border-radius:50%;background:var(--teal);animation:pulse 1.8s ease-in-out infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
.dash-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:14px;}
.dash-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:14px;}
.dash-card .lbl{font-size:10.5px;letter-spacing:.08em;color:rgba(255,255,255,.5);text-transform:uppercase;font-weight:600;}
.dash-card .val{font-family:var(--font-display);font-size:30px;color:var(--white);margin-top:6px;}
.dash-card .val small{font-size:13px;color:rgba(255,255,255,.5);font-weight:500;margin-left:2px;}
.dash-card.hr .val{color:var(--coral);}
.dash-card.salt .val{color:var(--teal);}
.dash-wave{height:38px;width:100%;display:block;margin-top:4px;overflow:hidden;}
.wave-track{fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.wave-track.hr-track{stroke:var(--coral);animation:scrollWave 2.6s linear infinite;}
.wave-track.salt-track{stroke:var(--teal);animation:scrollWave 4.5s linear infinite;}
@keyframes scrollWave{from{transform:translateX(0);}to{transform:translateX(-260px);}}
@media (prefers-reduced-motion: reduce){
  .wave-track{animation:none;}
  .dash-dot i{animation:none;}
}
.dash-foot{display:flex;justify-content:space-between;font-size:10.5px;color:rgba(255,255,255,.4);padding-top:12px;border-top:1px solid rgba(255,255,255,.08);}

/* ---------- stat strip ---------- */
.stat-strip{background:var(--cream-2);border-bottom:1px solid var(--line);}
.stat-strip .wrap{display:grid;grid-template-columns:repeat(3,1fr);padding:30px 28px;}
.stat-strip .item{padding:0 20px;border-left:1px solid var(--line);}
.stat-strip .item:first-child{border-left:none;padding-left:0;}
.stat-strip .item b{font-family:var(--font-display);font-size:24px;color:var(--ink);display:block;}
.stat-strip .item span{font-size:13px;color:var(--text-soft);}

/* ============================================================
   HOME — page nav cards
   ============================================================ */
.pagenav{background:var(--white);}
.pagenav-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.pagenav-card{
  border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;background:var(--cream);
  transition:border-color .15s ease, transform .15s ease;
}
.pagenav-card:hover{border-color:var(--teal);transform:translateY(-3px);}
.pagenav-card .num{font-family:var(--font-display);font-size:13px;color:var(--teal-dark);font-weight:600;}
.pagenav-card h3{font-size:19px;margin-top:10px;color:var(--ink);}
.pagenav-card p{margin-top:8px;font-size:14px;color:var(--text-soft);}
.pagenav-card .go{margin-top:16px;font-size:13.5px;font-weight:600;color:var(--ink);display:inline-flex;align-items:center;gap:6px;}
.pagenav-card .go svg{width:14px;height:14px;}

/* ============================================================
   PAGE HEADER (subpages)
   ============================================================ */
.page-header{background:var(--bg-deep);color:var(--white);padding:56px 0;}
.page-header h1{font-size:clamp(28px,3.6vw,42px);margin-top:12px;color:var(--white);}
.page-header p{margin-top:14px;font-size:16.5px;color:rgba(255,255,255,.72);max-width:600px;}
.crumb{font-size:13px;color:rgba(255,255,255,.5);margin-top:2px;}
.crumb a{color:rgba(255,255,255,.75);}
.crumb a:hover{color:var(--teal);}

/* ============================================================
   PROBLEM PAGE
   ============================================================ */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.info-card{background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);padding:24px;}
.info-card .tag{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--teal);}
.info-card h4{font-size:18px;margin-top:10px;color:var(--ink);}
.info-card p{margin-top:8px;font-size:14.5px;color:var(--text-soft);}
.info-card.warn .tag{color:var(--coral);}

/* ============================================================
   METHODOLOGY PAGE
   ============================================================ */
.method-figure{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);}
.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;}
.method-copy p{color:var(--text-soft);font-size:15.5px;margin-bottom:14px;}
.method-copy p strong{color:var(--ink);}
.node-list{margin-top:20px;display:grid;gap:12px;}
.node{display:flex;gap:12px;padding:14px 16px;background:var(--cream);border:1px solid var(--line);border-radius:10px;}
.node .n-icon{width:32px;height:32px;border-radius:8px;background:var(--cream-2);display:flex;align-items:center;justify-content:center;flex:none;color:var(--teal-dark);}
.node .n-icon svg{width:17px;height:17px;}
.node b{display:block;font-size:14px;color:var(--ink);}
.node span{font-size:13px;color:var(--text-soft);}

/* ============================================================
   PROTOTYPE TIMELINE
   ============================================================ */
.timeline{display:grid;gap:0;}
.tl-row{display:grid;grid-template-columns:90px 1fr 1.15fr;gap:32px;padding:36px 0;border-top:1px solid var(--line);align-items:start;}
.tl-row:first-child{border-top:none;}
.tl-num{font-family:var(--font-display);font-size:15px;color:var(--teal-dark);font-weight:700;}
.tl-figure{border-radius:10px;overflow:hidden;border:1px solid var(--line);background:var(--cream);}
.tl-figure img{width:100%;aspect-ratio:4/3;object-fit:contain;background:var(--white);}
.tl-copy .tl-tag{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-soft);font-weight:600;}
.tl-copy h3{font-size:20px;margin-top:5px;color:var(--ink);}
.tl-copy p{margin-top:10px;font-size:14.5px;color:var(--text-soft);}
.tl-copy p strong{color:var(--ink);}

.paper-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.paper-card{background:var(--cream);border:1px solid var(--line);border-radius:10px;overflow:hidden;}
.paper-card img{aspect-ratio:4/3;object-fit:cover;width:100%;}
.paper-card .cap{padding:12px 14px;font-size:13.5px;color:var(--text-soft);}
.paper-card .cap b{color:var(--teal-dark);}

/* ============================================================
   TESTING PAGE
   ============================================================ */
.testing-top{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-bottom:48px;}
.graph-card{background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);padding:20px;}
.graph-card img{border-radius:8px;border:1px solid var(--line);}
.graph-card .cap{margin-top:12px;font-size:13.5px;color:var(--text-soft);}

.video-card{background:var(--bg-deep);border-radius:var(--radius);overflow:hidden;color:var(--white);}
.video-frame{aspect-ratio:16/9;background:#000;}
.video-frame video{width:100%;height:100%;object-fit:cover;display:block;}
.video-frame iframe{width:100%;height:100%;display:block;border:0;}
.video-info{padding:16px 20px;}
.video-info p{font-size:13px;color:rgba(255,255,255,.65);margin-top:4px;}

.gallery-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:20px;flex-wrap:wrap;gap:8px;}
.gallery-head h3{font-size:19px;color:var(--ink);}
.gallery-head p{font-size:13.5px;color:var(--text-soft);}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.gallery figure{margin:0;border-radius:10px;overflow:hidden;background:var(--cream);border:1px solid var(--line);}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;}

.coach-note{margin-top:36px;display:flex;gap:14px;align-items:flex-start;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;}
.coach-note svg{width:20px;height:20px;color:var(--teal-dark);flex:none;margin-top:2px;}
.coach-note p{font-size:14.5px;color:var(--text-soft);}
.coach-note b{color:var(--ink);}

.testimonials{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.testimonial-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;display:flex;flex-direction:column;gap:14px;position:relative;}
.testimonial-card::before{content:"\201C";font-family:var(--font-display);font-size:42px;line-height:1;color:var(--teal);}
.testimonial-card p{font-size:14px;color:var(--text-soft);font-style:italic;margin:0;}
.testimonial-card .t-name{font-family:var(--font-display);font-size:13.5px;font-weight:600;color:var(--ink);margin-top:auto;padding-top:6px;border-top:1px solid var(--line);}

/* ============================================================
   ABOUT PAGE
   ============================================================ */
.about-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:center;}
.about-photos{position:relative;max-width:320px;}
.about-photos .p-main{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);}
.about-photos .p-badge{
  position:absolute;bottom:-20px;right:-16px;width:112px;
  border-radius:10px;overflow:hidden;border:4px solid var(--white);
  box-shadow:0 10px 24px -10px rgba(22,33,58,.35);background:var(--white);
}
.about-copy p.bio{margin-top:16px;font-size:15.5px;color:var(--text-soft);}
.about-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap;align-items:center;}
.about-contact{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink);}
.about-contact svg{width:16px;height:16px;color:var(--teal-dark);}

/* ============================================================
   PAGE FOOTER NAV (prev/next)
   ============================================================ */
.page-flow{border-top:1px solid var(--line);background:var(--cream);}
.page-flow .wrap{display:flex;justify-content:space-between;padding:26px 28px;gap:16px;flex-wrap:wrap;}
.page-flow a{display:flex;flex-direction:column;font-size:13px;color:var(--text-soft);}
.page-flow a b{font-family:var(--font-display);font-size:16px;color:var(--ink);margin-top:3px;}
.page-flow a.next{text-align:right;align-items:flex-end;}
.page-flow a:hover b{color:var(--teal-dark);}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{background:var(--bg-deep);color:rgba(255,255,255,.6);padding:40px 0 26px;}
.site-footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;}
.site-footer .f-brand{display:flex;align-items:center;gap:10px;color:var(--white);font-family:var(--font-display);font-weight:600;}
.site-footer .f-links{display:flex;gap:20px;flex-wrap:wrap;}
.site-footer .f-links a{font-size:13.5px;color:rgba(255,255,255,.6);}
.site-footer .f-links a:hover{color:var(--teal);}
.site-footer .f-bottom{margin-top:24px;padding-top:20px;border-top:1px solid var(--line-dark);font-size:12.5px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;gap:36px;}
  .method-grid{grid-template-columns:1fr;}
  .method-figure{order:-1;}
  .testing-top{grid-template-columns:1fr;}
  .about-grid{grid-template-columns:1fr;}
  .about-photos{margin:0 auto;}
  .card-grid{grid-template-columns:1fr;}
  .pagenav-grid{grid-template-columns:1fr;}
  .tl-row{grid-template-columns:1fr;gap:14px;}
  .tl-figure img{aspect-ratio:16/9;}
  .stat-strip .wrap{grid-template-columns:1fr;gap:16px;}
  .stat-strip .item{border-left:none;border-top:1px solid var(--line);padding:16px 0 0;}
  .stat-strip .item:first-child{border-top:none;padding-top:0;}
  .gallery{grid-template-columns:repeat(2,1fr);}
  .testimonials{grid-template-columns:1fr;}
}

@media (max-width:860px){
  .nav-links{
    position:fixed;inset:70px 0 0 0;background:var(--bg-deep);
    flex-direction:column;align-items:stretch;padding:16px;gap:2px;
    transform:translateX(100%);transition:transform .25s ease;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{padding:14px 12px;font-size:16px;border-bottom:1px solid var(--line-dark);border-radius:0;}
  .nav-toggle{display:block;}
  .nav-links + .btn-primary{display:none;}
}

@media (max-width:640px){
  .wrap{padding:0 20px;}
  .dash-grid{grid-template-columns:1fr;}
  .paper-cards{grid-template-columns:1fr;}
  .gallery{grid-template-columns:1fr 1fr;}
  .section{padding:52px 0;}
  .hero{padding:44px 0 56px;}
  .page-header{padding:44px 0;}
}