/* ---
   1. Global Settings & Variables
   2. Typography & Base Styles
   3. Utility Classes (Buttons, Containers)
   4. Header & Navigation
   5. Hero Sections
   6. Page-Specific Sections
   7. Footer
   8. Contact Form
   9. Responsive Media Queries
   --- */

/* 1. Global Settings & Variables
   -------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&family=Open+Sans:wght@400;600&display=swap');

:root {
  --primary-color: #005A9C;   /* A professional, trustworthy blue */
  --secondary-color: #008A00; /* A calm, health-focused green */
  --accent-color: #FFA500;    /* A warm, "action" orange for CTAs */
  --dark-text: #333333;
  --light-text: #FFFFFF;
  --body-bg: #FFFFFF;
  --section-bg: #F8F9FA;
  --border-color: #E0E0E0;
  
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 10px rgba(0,0,0,0.1);
  --border-radius: 8px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

/* 2. Typography & Base Styles
   -------------------------------- */
body {
  font-family: var(--font-body);
  line-height: 1.7;
  color: var(--dark-text);
  background-color: var(--body-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.5rem; }

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-color);
}

img {
  max-width: 100%;
  height: auto;
  opacity: 0;
  transform: translateY(8px);
  animation: fadeInImage 0.8s ease forwards;
}

@keyframes fadeInImage {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

ul {
  list-style-type: none;
}

section {
  padding: 5rem 0;
}

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

/* 3. Utility Classes
   -------------------------------- */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 1.75rem;
  border-radius: 50px;
  text-decoration: none;
  border: 2px solid transparent;
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--light-text);
  border-color: var(--accent-color);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #E69500;
  border-color: #E69500;
  color: var(--light-text);
}

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

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background-color: var(--primary-color);
  color: var(--light-text);
}

.btn-group {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* 4. Header & Navigation
   -------------------------------- */
.main-header {
  background-color: var(--body-bg);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--primary-color);
}

.logo img {
  max-height: 80px;
}

.main-nav ul {
  display: flex;
  gap: 2rem;
}

.main-nav a {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--dark-text);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-nav-toggle img {
  width: 30px;
  height: 30px;
}

/* 5. Hero Sections
   -------------------------------- */
.hero {
  padding: 6rem 0;
  background-color: var(--section-bg);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3rem;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-content .subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.1rem;
  line-height: 1.8;
}

.hero-image img {
  width: 100%;
  max-width: 500px;
  display: block;
  margin: 0 auto;
}

/* Page-specific hero (simpler) */
.page-hero {
  background-color: var(--primary-color);
  color: var(--light-text);
  padding: 4rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero h1 {
  color: var(--light-text);
  font-size: 2.5rem;
}

.page-hero p {
  font-size: 1.15rem;
  max-width: 800px;
  margin: 1rem auto 0;
  opacity: 0.9;
}

/* 6. Page-Specific Sections
   -------------------------------- */

/* --- Homepage: "Why" Section --- */
.why-section {
  text-align: center;
}

.why-features {
  display: flex;
  justify-content: space-around;
  gap: 1.5rem;
  margin-top: 3rem;
}

.why-feature {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--secondary-color);
}

/* --- Homepage: "How It Works" Section --- */
.how-it-works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}

.how-it-works-step {
  padding: 2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--body-bg);
  box-shadow: var(--shadow-sm);
}

.how-it-works-step .step-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.how-it-works-step h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

/* --- Homepage: "Audience" Section --- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}
.audience-grid4 {
  display: grid;
  grid-template-columns: repeat(4, 2fr);
  gap: 1rem;
  margin-top: 1rem;
}

.audience-card {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--body-bg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.audience-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.audience-card-content {
  padding: 2rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.audience-card-content h3 {
  font-size: 1.4rem;
}

.audience-card-content p {
  flex-grow: 1;
}

.audience-card-content .btn {
  margin-top: auto;
  text-align: center;
}

/* --- Homepage: CTA Banner --- */
.cta-banner {
  background-color: #4f73a7; /* <--- YOUR NEW BLUE */
  color: var(--light-text);
  padding: 4rem 0;
  text-align: center;
}

.cta-banner h2 {
  color: var(--light-text);
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

/* --- Generic Content Page Layout --- */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: flex-start;
}

.content-grid-reverse {
  display: grid; 
  /* --- FIX #1: Changed from 1fr 2fr to 1fr 1fr for balance --- */
  grid-template-columns: 1fr 1fr;
  gap: 3rem; 
  align-items: flex-start; 
}

.content-grid img,
.content-grid-reverse img { 
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  max-width: 80%; /* Ensures image is not wider than column */
}

/* --- Feature Lists (Patients/Clinicians) --- */
.feature-list {
  list-style-type: none;
  margin-top: 2rem;
}

.feature-list li {
  position: relative;
  padding-left: 2.5rem;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.feature-list li::before {
  content: '✔'; /* Or use an icon */
  position: absolute;
  left: 0;
  top: 0;
  color: var(--secondary-color);
  font-size: 1.5rem;
  font-weight: 700;
}

/* --- Research Page Layout --- */
.research-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 3rem;
}

.page-about .research-column h2,
.page-about .content h2 {
  text-align: center;
}

.research-column h3 {
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 0.5rem;
}

.research-column ul {
  list-style-type: disc;
  padding-left: 1.5rem;
}

.research-column li {
  margin-bottom: 0.75rem;
}

.data-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 3rem;
  text-align: center;
}

.data-feature {
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--body-bg);
}

/* --- Fix for 3-Column Grids --- */
.how-it-works-grid.grid-3-col {
  grid-template-columns: repeat(3, 1fr);
}

/* 7. Footer
   -------------------------------- */
.main-footer {
  background-color: #222222;
  color: #CCCCCC;
  padding-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 3rem;
}

.footer-col h4 {
  color: var(--light-text);
  margin-bottom: 1.5rem;
}

.footer-col p {
  margin-bottom: 1.5rem;
}

.footer-logo img {
  max-height: 40px;
  margin-bottom: 1rem;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-nav a {
  color: #CCCCCC;
}

.footer-nav a:hover {
  color: var(--light-text);
  text-decoration: underline;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  display: inline-block;
  width: 40px;
  height: 40px;
  background-color: #444;
  color: var(--light-text);
  display: grid;
  place-items: center;
  border-radius: 50%;
}

.social-links a:hover {
  background-color: var(--primary-color);
}

.social-links img {
  height: 20px;
  width: 20px;
  filter: invert(1);
}

.footer-bottom {
  border-top: 1px solid #444;
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.9rem;
}

/* 8. Contact Form
   -------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  background-color: var(--section-bg);
  padding: 3rem;
  border-radius: var(--border-radius);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.form-group .form-control {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--body-bg);
  transition: border-color 0.3s ease;
}

.form-group .form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 90, 156, 0.2);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.contact-info h3 {
  margin-bottom: 1.5rem;
}

.contact-info p {
  line-height: 1.8;
}
/* ---
   Styles for new "Why" Features
   (Add before Media Queries)
   --- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 3.5rem;
  align-items: stretch; /* This forces all items to the same height */
}

.feature-card {
  background-color: var(--body-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  
  height: 100%; 
  display: flex;
  flex-direction: column;
}
.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.5rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background-color: var(--section-bg);
  border: 2px solid var(--primary-color);
}

.feature-icon svg {
  width: 36px;
  height: 36px;
  color: var(--primary-color);
}

.feature-card h3 {
  font-size: 1.3rem;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 0;
  flex-grow: 1; 
}

/* ---
   Styles for Hero Pattern Overlay
   (Add before Media Queries)
   --- */

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0; 
  background-repeat: repeat;
}

/* Pattern 1: For Patients (the "plus" pattern) */
.page-patients .page-hero::before {
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FFFFFF' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm-15 15v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* Pattern 2: For Clinicians, About, & Contact (a subtle "dot" pattern) */
.page-clinicians .page-hero::before,
.page-about .page-hero::before,
.page-contact .page-hero::before {
  background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23FFFFFF' fill-opacity='0.1'%3E%3Ccircle cx='5' cy='5' r='3'/%3E%3Ccircle cx='15' cy='15' r='3'/%3E%3C/g%3E%3C/svg%3E");
}

/* Pattern 3: For Researchers (a subtle "diagonal lines" pattern) */
.page-researchers .page-hero::before {
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='10' viewBox='0 0 10 10' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M-1 1l2-2m0 12l12-12' stroke='%23FFFFFF' stroke-width='1' fill='none' fill-rule='evenodd' opacity='0.1'/%3E%3C/svg%3E");
}

/* 3. Make sure the text stays on top of the pattern */
.page-hero .container {
  position: relative;
  z-index: 1;
}

/* 9. Responsive Media Queries
   -------------------------------- */

/* --- Tablet (Medium Devices) --- */
@media (max-width: 992px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content {
    order: 2;
  }
  
  .hero-image {
    order: 1;
    margin-bottom: 2rem;
  }
  
  .hero-image img {
    max-width: 400px;
  }
  
  .btn-group {
    justify-content: center;
  }

  .main-header .container {
    position: relative;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 71px;
    left: 0;
    right: 0;
    background-color: var(--body-bg);
    flex-direction: column;
    width: 100%;
    padding: 1rem;
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--border-color);
  }

  .main-nav.active {
    display: flex;
  }

  .main-nav ul {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }

  .main-nav li {
    width: 100%;
  }

  .main-nav a {
    display: block;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .main-nav a:hover,
  .main-nav a.active {
    border-bottom: 1px solid var(--border-color);
    background-color: var(--section-bg);
  }

  .mobile-nav-toggle {
    display: block;
  }

  .mobile-nav-toggle .icon-close {
    display: none;
  }

  .mobile-nav-toggle.active .icon-menu {
    display: none;
  }

  .mobile-nav-toggle.active .icon-close {
    display: block;
  }

  .audience-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .how-it-works-grid,
  .features-grid { 
    grid-template-columns: 1fr 1fr;
  }

  .how-it-works-grid.grid-3-col {
    grid-template-columns: 1fr 1fr;
  }

  .content-grid,
  .content-grid-reverse {
    grid-template-columns: 1fr;
  }
  
  .content-grid img,
  .content-grid-reverse img {
    /* --- FIX #2: Changed from 500px to 100% to prevent overflow --- */
    max-width: 100%;
    margin: 0 auto 2rem;
    display: block;
  }
  
  .content-grid-reverse .content {
    order: 2;
  }
  
  .content-grid-reverse .image {
    order: 1;
  }

  .research-columns {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-col-1 {
    grid-column: 1 / -1; /* Span full width */
  }
  
  .contact-layout {
    grid-template-columns: 1fr;
  }
}


/* --- Mobile (Small Devices) --- */
@media (max-width: 767px) {
  h1 { font-size: 2.1rem; }
  h2 { font-size: 1.8rem; }
  section { padding: 3rem 0; }

  .why-features, .btn-group {
    flex-direction: column;
    align-items: center;
  }
  
  .audience-grid {
    grid-template-columns: 1fr;
  }
  
  .how-it-works-grid,
  .features-grid { 
    grid-template-columns: 1fr;
  }

  .how-it-works-grid.grid-3-col {
    grid-template-columns: 1fr;
  }

  .page-about .research-column,
  .page-about .content {
    text-align: center;
  }

  .page-about .research-column h2,
  .page-about .content h2 {
    text-align: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}