/* =========================
   CSS RESET
   ========================= */
*,
*::before,
*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}

html{
  font-size:16px;
}

body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:#1f2933;
  line-height:1.7;         /* readability */
  font-size:17px;          /* readability */
  background:#ffffff;
}

/* =========================
   COLOUR PALETTE
   ========================= */
:root{
  --primary:#0f766e;        /* deep teal */
  --primary-soft:#e6f4f1;   /* soft teal background */
  --accent:#1d4ed8;         /* blue accent */
  --text:#1f2933;
  --muted:#6b7280;
  --border:#e6e8eb;
}

/* =========================
   TYPOGRAPHY
   ========================= */
h1{
  font-size:2.6rem;
  line-height:1.2;
  color:var(--primary);
  margin-bottom:16px;
}

h2{
  font-size:2rem;
  color:var(--primary);
  margin-bottom:12px;
}

h3{
  font-size:1.3rem;
  margin-bottom:8px;
  color:var(--primary);
}

p{
  margin-bottom:12px;
  max-width:75ch;          /* readability */
}

li{
  max-width:75ch;          /* readability */
}

.lead{
  font-size:1.22rem;       /* readability */
  line-height:1.65;        /* readability */
  color:#374151;
  max-width:70ch;
}

.micro{
  font-size:0.9rem;
  color:var(--muted);
  max-width:75ch;
}

.eyebrow{
  font-size:0.75rem;
  font-weight:600;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:8px;
}

/* =========================
   LINKS & BUTTONS
   ========================= */
a{
  color:var(--primary);
  text-decoration:none;
}

a:hover{
  text-decoration:underline;
}

.btn{
  display:inline-block;
  background:var(--primary);
  color:#ffffff;
  padding:12px 22px;
  border-radius:999px;
  font-weight:600;
  text-decoration:none;
}

.btn:hover{
  background:#115e59;
  text-decoration:none;
}

.btn-ghost{
  background:transparent;
  color:var(--primary);
  border:2px solid var(--primary);
}

.btn-ghost:hover{
  background:var(--primary-soft);
}

.btn-small{
  padding:8px 16px;
  font-size:0.9rem;
}

/* =========================
   LAYOUT
   ========================= */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

.grid{
  display:grid;
  gap:24px;
}

.grid.cols-2{
  grid-template-columns:repeat(2,1fr);
}

.grid.cols-3{
  grid-template-columns:repeat(3,1fr);
}

@media (max-width: 900px){
  .grid.cols-2,
  .grid.cols-3{
    grid-template-columns:1fr;
  }
}

/* =========================
   HEADER & NAVIGATION
   ========================= */
.site-header{
  background:#ffffff;
  border-bottom:1px solid var(--border);
}

.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:92px;
  position:relative;
}

.logo{
  display:flex;
  align-items:center;
}

/* Banner-style anatomical logo */
.logo-img{
  height:64px;
  width:auto;
  max-width:360px;
  object-fit:contain;
  display:block;
}

.nav{
  display:flex;
  align-items:center;
  gap:26px;               /* menu spacing */
}

.nav a{
  font-weight:500;
  color:var(--text);
  padding:8px 4px;
  white-space:nowrap;
}

.nav a:hover{
  color:var(--primary);
}

.nav-toggle{
  display:none;
  font-size:1.8rem;
  background:none;
  border:none;
  cursor:pointer;
}

/* =========================
   MOBILE NAV
   ========================= */
@media (max-width: 768px){
  .logo-img{
    height:48px;
    max-width:260px;
  }

  .nav-toggle{
    display:block;
  }

  .nav{
    display:none;
    position:absolute;
    top:92px;
    right:24px;
    background:#ffffff;
    border:1px solid var(--border);
    border-radius:16px;
    padding:20px;
    flex-direction:column;
    align-items:flex-start;
    gap:16px;
    box-shadow:0 20px 40px rgba(0,0,0,0.08);
  }
}

/* =========================
   HERO
   ========================= */
.hero{
  padding:80px 0;
  background:linear-gradient(
    135deg,
    var(--primary-soft),
    #ffffff
  );
}

.hero-cta{
  display:flex;
  gap:16px;
  margin-top:24px;
  flex-wrap:wrap;
}

/* =========================
   SECTIONS
   ========================= */
.section{
  padding:80px 0; /* readability/breathing room */
}

.section.alt{
  background:#f9fafb;
}

.section-head{
  max-width:720px;
  margin-bottom:40px;
}

.subhead{
  color:var(--muted);
  max-width:75ch;
}

/* =========================
   CARDS / BOXES
   ========================= */
.card{
  background:#ffffff;
  border:1px solid var(--border);
  border-radius:20px;
  padding:28px;
  box-shadow:0 12px 30px rgba(0,0,0,0.04);
  position:relative;
  overflow:hidden;
}

.card p,
.card li{
  max-width:70ch;
}

/* =========================
   LISTS
   ========================= */
.bullets,
.checklist{
  list-style:none;
}

.bullets li,
.checklist li{
  padding-left:24px;
  position:relative;
  margin-bottom:10px;
}

.bullets li::before{
  content:"•";
  position:absolute;
  left:0;
  color:var(--primary);
}

.checklist li::before{
  content:"✓";
  position:absolute;
  left:0;
  color:var(--primary);
}

/* =========================
   FOOTER
   ========================= */
.site-footer{
  background:#ffffff;
  border-top:1px solid var(--border);
  padding:48px 0;
}

.footer-grid{
  display:grid;
  gap:32px;
  grid-template-columns:repeat(3,1fr);
}

.footer-title{
  font-weight:600;
  margin-bottom:8px;
}

.footer-links{
  list-style:none;
}

.footer-links li{
  margin-bottom:6px;
}

@media (max-width: 900px){
  .footer-grid{
    grid-template-columns:1fr;
  }
}

/* =========================
   ACCESSIBILITY
   ========================= */
.skip{
  position:absolute;
  left:-999px;
}

.skip:focus{
  left:24px;
  top:24px;
  background:#000;
  color:#fff;
  padding:8px 12px;
  border-radius:10px;
}

/* =========================
   ANATOMICAL ACCENTS (SUBTLE)
   ========================= */
.section-head h2{
  position:relative;
  padding-bottom:14px;
}

.section-head h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:84px;
  height:4px;
  border-radius:999px;
  background:linear-gradient(90deg, var(--primary), var(--accent));
}

/* subtle vertical accent inside cards */
.card::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  height:100%;
  width:4px;
  background:linear-gradient(180deg, var(--primary), transparent);
  opacity:0.35;
}