/* =========================================================
   Meridian Diagnostic Laboratory — Stylesheet
   Single font family: Inter (400 / 500 / 600 / 700)
   ========================================================= */

/* ---------- Design Tokens ---------- */
:root{
  /* Colour palette */
  --color-primary:        #0B3D66; /* deep medical blue */
  --color-primary-dark:   #082C4A;
  --color-primary-tint:   #E7EEF4;
  --color-secondary:      #1B8A8A; /* teal */
  --color-secondary-dark: #146E6E;
  --color-secondary-tint: #E4F3F3;
  --color-bg:             #FFFFFF;
  --color-bg-alt:         #F6F8F9; /* very light grey */
  --color-text:           #333333;
  --color-text-muted:     #5B6570;
  --color-border:         #E3E7EA;
  --color-success:        #2E7D4F;
  --color-success-tint:   #EAF6EE;
  --color-error:          #A6402C;
  --color-error-tint:     #FBEDEA;

  /* Type scale */
  --fs-h1: 48px;
  --fs-h2: 36px;
  --fs-h3: 28px;
  --fs-h4: 22px;
  --fs-body: 16px;
  --fs-small: 14px;

  --lh-body: 1.6;
  --lh-heading: 1.2;

  /* Spacing system */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 64px;
  --sp-7: 96px;

  --radius: 10px;
  --max-width: 1200px;

  --shadow-sm: 0 1px 3px rgba(11, 61, 102, 0.08);
  --shadow-md: 0 4px 16px rgba(11, 61, 102, 0.10);

  --transition: 180ms ease;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; display: block; }

a{ color: var(--color-primary); text-decoration: none; }

ul, ol{ margin: 0; padding: 0; list-style: none; }

button{ font-family: inherit; cursor: pointer; }

input, textarea, select{ font-family: inherit; font-size: inherit; }

h1, h2, h3, h4, h5{
  font-weight: 700;
  line-height: var(--lh-heading);
  margin: 0 0 var(--sp-2);
  color: var(--color-primary-dark);
}

h1{ font-size: var(--fs-h1); }
h2{ font-size: var(--fs-h2); }
h3{ font-size: var(--fs-h3); }
h4{ font-size: var(--fs-h4); font-weight: 600; }

p{ margin: 0 0 var(--sp-2); color: var(--color-text); }

.text-muted{ color: var(--color-text-muted); }

/* Visible keyboard focus everywhere */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.nav-link:focus-visible{
  outline: 2px solid var(--color-secondary);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------- Layout helpers ---------- */
.container{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--sp-3);
}

.section{
  padding: var(--sp-7) 0;
}

.section--alt{
  background: var(--color-bg-alt);
}

.section-head{
  max-width: 680px;
  margin: 0 0 var(--sp-5);
}

.section-head.center{
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-secondary-dark);
  margin-bottom: var(--sp-2);
}

.eyebrow::before{
  content: "";
  width: 22px;
  height: 2px;
  background: var(--color-secondary);
  display: inline-block;
}

.grid{
  display: grid;
  gap: var(--sp-4);
}

.grid-2{ grid-template-columns: repeat(2, 1fr); }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px){
  .grid-3, .grid-4{ grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px){
  .grid-2, .grid-3, .grid-4{ grid-template-columns: 1fr; }
}

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  padding: 14px 28px;
  font-size: var(--fs-body);
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn:active{ transform: translateY(1px); }

.btn-primary{
  background: var(--color-primary);
  color: #FFFFFF;
}
.btn-primary:hover{ background: var(--color-primary-dark); }

.btn-secondary{
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover{ background: var(--color-primary-tint); }

.btn-teal{
  background: var(--color-secondary);
  color: #FFFFFF;
}
.btn-teal:hover{ background: var(--color-secondary-dark); }

.btn-block{ width: 100%; }

.btn-sm{ padding: 10px 20px; font-size: var(--fs-small); }

/* ---------- Header / Nav ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.navbar{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) 0;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: var(--color-primary-dark);
}

.brand-mark{
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.nav-links{
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.nav-link{
  font-weight: 500;
  font-size: var(--fs-small);
  color: var(--color-text);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

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

.nav-link.active{
  color: var(--color-primary);
  border-bottom-color: var(--color-secondary);
}

.nav-cta{ display: flex; align-items: center; gap: var(--sp-2); }

.nav-toggle{
  display: none;
  background: none;
  border: none;
  padding: 8px;
}

.nav-toggle span{
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-dark);
  margin: 5px 0;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity: 0; }
.nav-toggle.open span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px){
  .nav-toggle{ display: block; }
  .nav-links{
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
    transition: max-height var(--transition);
  }
  .nav-links.open{ max-height: 480px; }
  .nav-link{ padding: 14px var(--sp-3); border-bottom: 1px solid var(--color-border); }
  .nav-link.active{ background: var(--color-primary-tint); }
  .nav-cta{
    flex-direction: column;
    align-items: stretch;
    padding: var(--sp-2) var(--sp-3) var(--sp-3);
  }
}

/* ---------- Hero ---------- */
.hero{
  padding: var(--sp-7) 0 var(--sp-6);
  background: linear-gradient(180deg, var(--color-primary-tint) 0%, var(--color-bg) 100%);
}

.hero-inner{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--sp-6);
  align-items: center;
}

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

.hero h1{ margin-bottom: var(--sp-2); }

.hero-sub{
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: var(--sp-4);
}

.hero-actions{
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

.hero-trust{
  display: flex;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
  flex-wrap: wrap;
}

.hero-trust-item{
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
}

.hero-trust-item svg{ flex-shrink: 0; color: var(--color-secondary); }

.hero-art{
  position: relative;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: var(--sp-5);
  overflow: hidden;
}

/* ---------- Cards ---------- */
.card{
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--sp-4);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover{
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-secondary);
}

.card-icon{
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--color-secondary-tint);
  color: var(--color-secondary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-3);
}

.card h3, .card h4{ margin-bottom: 6px; }

.card-list{ margin: var(--sp-2) 0; }
.card-list li{
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  padding-left: 18px;
  position: relative;
  margin-bottom: 6px;
}
.card-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-secondary);
}

.card-link{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: var(--fs-small);
  color: var(--color-primary);
  margin-top: var(--sp-2);
}
.card-link svg{ transition: transform var(--transition); }
.card-link:hover svg{ transform: translateX(3px); }

/* ---------- Why choose us / feature rows ---------- */
.feature{
  display: flex;
  gap: var(--sp-3);
}

.feature-icon{
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-primary-tint);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Steps / How it works ---------- */
.steps{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
  position: relative;
}

@media (max-width: 900px){ .steps{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px){ .steps{ grid-template-columns: 1fr; } }

.step{ position: relative; padding-top: var(--sp-2); }

.step-number{
  font-size: 13px;
  font-weight: 700;
  color: var(--color-secondary-dark);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: var(--sp-1);
}

.step h4{ margin-bottom: 6px; }
.step p{ font-size: var(--fs-small); color: var(--color-text-muted); margin-bottom: 0; }

/* ---------- Hours + Map ---------- */
.hours-map{
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--sp-5);
  align-items: stretch;
}

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

.hours-table{ width: 100%; border-collapse: collapse; }
.hours-table td{
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-body);
}
.hours-table td:last-child{ text-align: right; color: var(--color-text-muted); }
.hours-table tr:last-child td{ border-bottom: none; }

.map-frame{
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 320px;
  box-shadow: var(--shadow-sm);
}
.map-frame iframe{ width: 100%; height: 100%; min-height: 320px; border: 0; display: block; }

/* ---------- CTA band ---------- */
.cta-band{
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  padding: var(--sp-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.cta-band h2, .cta-band p{ color: #fff; }
.cta-band p{ color: rgba(255,255,255,0.82); margin-bottom: 0; }

.cta-band .btn-secondary{
  border-color: #fff;
  color: #fff;
}
.cta-band .btn-secondary:hover{ background: rgba(255,255,255,0.12); }

/* ---------- Footer ---------- */
.site-footer{
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.78);
  padding: var(--sp-6) 0 var(--sp-3);
}

.footer-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--sp-4);
  padding-bottom: var(--sp-5);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

@media (max-width: 900px){ .footer-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px){ .footer-grid{ grid-template-columns: 1fr; } }

.footer-brand{ display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 18px; margin-bottom: var(--sp-2); }

.footer-col h5{
  color: #fff;
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--sp-2);
}

.footer-col li{ margin-bottom: 10px; font-size: var(--fs-small); }
.footer-col a{ color: rgba(255,255,255,0.78); }
.footer-col a:hover{ color: #fff; }

.footer-social{ display: flex; gap: 10px; margin-top: var(--sp-2); }
.footer-social a{
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  transition: background var(--transition);
}
.footer-social a:hover{ background: var(--color-secondary); }

.footer-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding-top: var(--sp-3);
  font-size: var(--fs-small);
}

.footer-bottom-links{ display: flex; gap: var(--sp-3); }
.footer-bottom-links a{ color: rgba(255,255,255,0.6); }
.footer-bottom-links a:hover{ color: #fff; }

/* ---------- Page hero (interior pages) ---------- */
.page-hero{
  background: var(--color-primary-tint);
  padding: var(--sp-6) 0 var(--sp-5);
}
.page-hero .eyebrow{ color: var(--color-secondary-dark); }
.page-hero p{ max-width: 620px; color: var(--color-text-muted); }
.breadcrumb{ font-size: var(--fs-small); color: var(--color-text-muted); margin-bottom: var(--sp-2); }
.breadcrumb a{ color: var(--color-text-muted); }
.breadcrumb a:hover{ color: var(--color-primary); }

/* ---------- About page ---------- */
.value-card{ text-align: left; }

.timeline{ position: relative; padding-left: var(--sp-4); border-left: 2px solid var(--color-border); }
.timeline-item{ position: relative; padding-bottom: var(--sp-5); }
.timeline-item:last-child{ padding-bottom: 0; }
.timeline-item::before{
  content: "";
  position: absolute;
  left: calc(-1 * var(--sp-4) - 6px);
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-secondary);
  border: 3px solid var(--color-secondary-tint);
}
.timeline-year{ font-weight: 700; color: var(--color-primary); font-size: var(--fs-small); letter-spacing: 0.04em; }

/* ---------- Pricing ---------- */
.pricing-table{
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.pricing-table thead th{
  background: var(--color-primary);
  color: #fff;
  text-align: left;
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.pricing-table td, .pricing-table th{ padding: var(--sp-2) var(--sp-3); }
.pricing-table tbody td{ border-bottom: 1px solid var(--color-border); font-size: var(--fs-body); }
.pricing-table tbody tr:last-child td{ border-bottom: none; }
.pricing-table tbody tr:hover{ background: var(--color-bg-alt); }
.pricing-table .price{ font-weight: 700; color: var(--color-primary-dark); white-space: nowrap; }
.pricing-category{
  font-weight: 700;
  color: var(--color-secondary-dark);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: var(--sp-5) 0 var(--sp-2);
}
.pricing-category:first-of-type{ margin-top: 0; }
.pricing-note{
  background: var(--color-secondary-tint);
  border: 1px solid var(--color-secondary);
  border-radius: var(--radius);
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--fs-small);
  color: var(--color-secondary-dark);
  margin-top: var(--sp-4);
}

/* ---------- FAQ Accordion ---------- */
.accordion{ border-top: 1px solid var(--color-border); }
.accordion-item{ border-bottom: 1px solid var(--color-border); }
.accordion-trigger{
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: var(--sp-3) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--color-primary-dark);
}
.accordion-trigger .icon{
  flex-shrink: 0;
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--color-primary-tint);
  color: var(--color-primary);
  transition: transform var(--transition), background var(--transition);
}
.accordion-item.open .accordion-trigger .icon{ transform: rotate(45deg); background: var(--color-secondary); color: #fff; }
.accordion-panel{
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}
.accordion-panel-inner{ padding-bottom: var(--sp-3); color: var(--color-text-muted); max-width: 760px; }

/* ---------- Contact ---------- */
.contact-grid{
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--sp-6);
  align-items: start;
}
@media (max-width: 900px){ .contact-grid{ grid-template-columns: 1fr; } }

.contact-info-item{
  display: flex;
  gap: var(--sp-2);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.contact-info-item:last-child{ border-bottom: none; }

.contact-quick{ display: flex; gap: var(--sp-2); margin-top: var(--sp-4); flex-wrap: wrap; }

.form-group{ margin-bottom: var(--sp-3); }
.form-group label{
  display: block;
  font-size: var(--fs-small);
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-primary-dark);
}
.form-group input,
.form-group textarea{
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus{
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px var(--color-secondary-tint);
}
.form-group textarea{ resize: vertical; min-height: 140px; }
.field-error{
  font-size: 13px;
  color: var(--color-error);
  margin-top: 6px;
  display: none;
}
.form-group.has-error input,
.form-group.has-error textarea{ border-color: var(--color-error); }
.form-group.has-error .field-error{ display: block; }

.form-row{ display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
@media (max-width: 560px){ .form-row{ grid-template-columns: 1fr; } }

.form-alert{
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius);
  font-size: var(--fs-small);
  margin-bottom: var(--sp-3);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.form-alert.success{ background: var(--color-success-tint); color: var(--color-success); border: 1px solid var(--color-success); }
.form-alert.error{ background: var(--color-error-tint); color: var(--color-error); border: 1px solid var(--color-error); }

/* ---------- Utility: fade-in on scroll ---------- */
.fade-in{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms ease, transform 500ms ease;
}
.fade-in.is-visible{
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Back to top ---------- */
.back-to-top{
  position: fixed;
  right: var(--sp-3);
  bottom: var(--sp-3);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 90;
}
.back-to-top.show{ opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover{ background: var(--color-primary-dark); }

/* ---------- Responsive type ---------- */
@media (max-width: 640px){
  :root{
    --fs-h1: 34px;
    --fs-h2: 28px;
    --fs-h3: 22px;
    --fs-h4: 19px;
  }
  .section{ padding: var(--sp-6) 0; }
  .cta-band{ flex-direction: column; align-items: flex-start; text-align: left; }
}