/*
Theme Name: Signal
Theme URI: https://flowandboost.com/
Author: Flow & Boost Studio
Author URI: https://flowandboost.com/
Description: A structured, data-forward theme built for a technical SEO & GEO consultant targeting US health-tech and health-data companies. Editable content lives in front-page.php and functions.php.
Version: 1.0
Requires PHP: 7.4
Text Domain: signal
*/

/* ---------- Tokens ---------- */
:root{
  --ink:#101B2D;
  --ink-soft:#33415A;
  --paper:#EEF1EF;
  --paper-dim:#E3E7E4;
  --panel:#FFFFFF;
  --teal:#2F6F5E;
  --gold:#B98A2E;
  --line:#C9CDC9;
  --muted:#5B6670;
  --radius:2px;
  --max:1180px;
  --gutter:clamp(20px, 5vw, 64px);
}

@media (prefers-color-scheme: dark){
  /* Intentionally not switching to a dark theme automatically:
     this site is read by prospects who expect a stable, professional look. */
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.01ms !important; transition-duration:0.01ms !important;}
}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:'Space Grotesk', 'IBM Plex Sans', sans-serif;
  font-weight:600;
  line-height:1.15;
  margin:0 0 0.5em;
  color:var(--ink);
}

h1{font-size:clamp(2.1rem, 4vw, 3.4rem); letter-spacing:-0.01em;}
h2{font-size:clamp(1.6rem, 3vw, 2.2rem);}
h3{font-size:1.2rem;}

p{margin:0 0 1em; max-width:38em;}
a{color:var(--teal); text-decoration:none;}
a:hover{color:var(--ink);}
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
}

.mono{
  font-family:'IBM Plex Mono', monospace;
  letter-spacing:-0.02em;
}

.container{
  max-width:var(--max);
  margin:0 auto;
  padding:0 var(--gutter);
}

.section{
  padding: clamp(56px, 9vw, 108px) 0;
  border-bottom:1px solid var(--line);
}
.section:last-of-type{border-bottom:none;}

.section--tight{padding: clamp(36px, 6vw, 64px) 0;}

.section-head{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  gap:24px;
  margin-bottom:40px;
  flex-wrap:wrap;
}
.section-head h2{margin:0;}
.section-head .section-note{
  color:var(--muted);
  max-width:26em;
  margin:0;
}

/* ---------- Header ---------- */
.site-header{
  border-bottom:1px solid var(--line);
  background:var(--paper);
  position:sticky;
  top:0;
  z-index:50;
}
.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:18px;
  padding-bottom:18px;
}
.site-branding a{
  color:var(--ink);
  font-family:'Space Grotesk', sans-serif;
  font-weight:600;
  font-size:1.15rem;
}
.site-branding .tagline{
  display:block;
  font-family:'IBM Plex Sans', sans-serif;
  font-weight:400;
  font-size:0.72rem;
  color:var(--muted);
  letter-spacing:0.01em;
}
.primary-nav ul{
  list-style:none;
  display:flex;
  gap:28px;
  margin:0;
  padding:0;
}
.primary-nav a{
  color:var(--ink-soft);
  font-size:0.95rem;
}
.primary-nav a:hover{color:var(--teal);}
.nav-toggle{
  display:none;
  background:none;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:8px 12px;
  font-family:inherit;
  cursor:pointer;
}
@media (max-width: 760px){
  .primary-nav{
    display:none;
    position:absolute;
    top:100%; left:0; right:0;
    background:var(--paper);
    border-bottom:1px solid var(--line);
  }
  .primary-nav.is-open{display:block;}
  .primary-nav .container{padding:20px var(--gutter);}
  .primary-nav ul{flex-direction:column; gap:16px;}
  .nav-toggle{display:inline-block;}
}

/* ---------- Hero ---------- */
.hero{
  padding: clamp(48px, 9vw, 96px) 0 clamp(40px, 6vw, 72px);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items:end;
}
@media (max-width: 900px){
  .hero-grid{grid-template-columns:1fr;}
}
.hero-copy p.lede{
  font-size:1.15rem;
  color:var(--ink-soft);
  max-width:34em;
}
.hero-actions{
  display:flex;
  gap:16px;
  margin-top:28px;
  flex-wrap:wrap;
}

.btn{
  display:inline-block;
  padding:12px 22px;
  border-radius:var(--radius);
  font-size:0.95rem;
  border:1px solid var(--ink);
  color:var(--ink);
}
.btn:hover{background:var(--ink); color:var(--paper);}
.btn-primary{
  background:var(--ink);
  color:var(--paper);
  border-color:var(--ink);
}
.btn-primary:hover{
  background:var(--teal);
  border-color:var(--teal);
  color:var(--paper);
}

.signal-panel{
  border:1px solid var(--line);
  background:var(--panel);
  padding:24px;
}
.signal-panel .signal-row{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  padding:10px 0;
  border-bottom:1px solid var(--paper-dim);
}
.signal-panel .signal-row:last-child{border-bottom:none;}
.signal-panel .signal-label{color:var(--muted); font-size:0.85rem;}
.signal-panel .signal-value{
  font-size:1.05rem;
  color:var(--ink);
}
.signal-panel .signal-value.up{color:var(--teal);}
.signal-panel-caption{
  color:var(--muted);
  font-size:0.78rem;
  margin-top:10px;
  margin-bottom:0;
}

/* ---------- Services ---------- */
.service-list{
  border-top:1px solid var(--line);
}
.service-row{
  display:grid;
  grid-template-columns: 1.1fr 1.4fr 0.9fr;
  gap:24px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
@media (max-width: 800px){
  .service-row{grid-template-columns:1fr;}
}
.service-row h3{margin-bottom:6px;}
.service-row .service-deliverable{
  color:var(--muted);
  font-size:0.88rem;
  text-transform:none;
}
.service-row .service-deliverable .mono{color:var(--ink-soft);}

/* ---------- Case studies ---------- */
.case-study{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  padding: 40px 0;
  border-bottom:1px solid var(--line);
  align-items:center;
}
@media (max-width: 860px){
  .case-study{grid-template-columns:1fr;}
}
.case-study img{
  width:100%;
  height:auto;
  border:1px solid var(--line);
  display:block;
}
.case-study .case-tag{
  display:inline-block;
  color:var(--teal);
  font-size:0.8rem;
  margin-bottom:10px;
}
.case-study .case-metric{
  font-size:1.6rem;
  color:var(--ink);
  margin:14px 0 6px;
}
.case-study .case-metric-label{
  color:var(--muted);
  font-size:0.85rem;
  margin-bottom:18px;
}
.case-grid-secondary{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(220px,1fr));
  gap:24px;
  margin-top:16px;
}
.case-secondary-item{
  border:1px solid var(--line);
  padding:18px;
}
.case-secondary-item .case-metric{font-size:1.15rem; margin:8px 0 4px;}

/* ---------- About / credentials ---------- */
.credentials{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
  margin-top:32px;
}
@media (max-width:700px){
  .credentials{grid-template-columns:1fr 1fr;}
}
.credential .cred-number{
  font-size:2rem;
  color:var(--teal);
  display:block;
}
.credential .cred-label{
  color:var(--muted);
  font-size:0.85rem;
}

/* ---------- CTA / contact ---------- */
.cta-block{
  text-align:left;
  background:var(--ink);
  color:var(--paper);
  padding:clamp(48px,7vw,80px) var(--gutter);
  border-radius:var(--radius);
}
.cta-block h2{color:var(--paper);}
.cta-block p{color:#C8D0CC;}
.cta-block .btn{border-color:var(--paper); color:var(--paper);}
.cta-block .btn:hover{background:var(--paper); color:var(--ink);}
.cta-block .btn-primary{background:var(--gold); border-color:var(--gold); color:var(--ink);}
.cta-block .btn-primary:hover{background:var(--paper); color:var(--ink); border-color:var(--paper);}

/* ---------- Footer ---------- */
.site-footer{
  padding:40px 0;
  color:var(--muted);
  font-size:0.85rem;
}
.site-footer .container{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:16px;
}
.site-footer a{color:var(--muted);}
.site-footer a:hover{color:var(--ink);}

/* ---------- Generic page/single templates ---------- */
.page-content, .single-content{
  padding: clamp(48px,8vw,88px) 0;
}
.page-content .container, .single-content .container{max-width:740px;}
.single-content .case-meta{
  color:var(--muted);
  font-size:0.9rem;
  margin-bottom:24px;
}