/*
 * Community Healthcare Systems - Early Intervention Website
 * Main Stylesheet - Design System
 */

/* ===========================
   CSS VARIABLES - DESIGN SYSTEM
   =========================== */

:root {
  /* Color Palette */
  --primary-blue: #87CEEB;
  --secondary-coral: #FF8B7B;
  --accent-mint: #98E4D8;
  --neutral-beige: #F5E6D3;
  --neutral-gray: #F7F7F7;
  --text-dark: #333333;
  --highlight-yellow: #FFE5B4;
  --white: #FFFFFF;

  /* Semantic Colors */
  --color-primary: var(--primary-blue);
  --color-secondary: var(--secondary-coral);
  --color-accent: var(--accent-mint);
  --color-background: var(--neutral-beige);
  --color-surface: var(--white);
  --color-text: var(--text-dark);
  --color-text-light: #666666;
  --color-border: #E0E0E0;

  /* Typography */
  --font-heading: 'Nunito Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --font-size-base: 16px;
  --font-size-mobile: 18px;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.5rem;
  --font-size-h4: 1.25rem;
  --font-size-h5: 1.125rem;
  --font-size-small: 0.875rem;

  --line-height-body: 1.6;
  --line-height-heading: 1.3;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* Breakpoints (for reference in media queries) */
  --breakpoint-mobile: 480px;
  --breakpoint-tablet: 768px;
  --breakpoint-desktop: 1024px;
  --breakpoint-wide: 1280px;
}

/* ===========================
   RESET & BASE STYLES
   =========================== */

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  max-width: 100vw;
}

/* ===========================
   TYPOGRAPHY
   =========================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-h1);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

h4 {
  font-size: var(--font-size-h4);
}

h5 {
  font-size: var(--font-size-h5);
}

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  color: var(--secondary-coral);
}

a:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

strong {
  font-weight: 700;
}

em {
  font-style: italic;
}

/* ===========================
   LAYOUT CONTAINERS
   =========================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
}

.container-narrow {
  max-width: 800px;
}

.section {
  padding: var(--spacing-xxl) 0;
}

.section-sm {
  padding: var(--spacing-xl) 0;
}

.section-lg {
  padding: 5rem 0;
}

/* ===========================
   NAVIGATION
   =========================== */

.navbar {
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-md);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus {
  background-color: var(--neutral-gray);
  color: var(--color-primary);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-cta {
  background-color: var(--secondary-coral);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  box-shadow: 0 2px 8px rgba(255, 139, 123, 0.3);
  white-space: nowrap;
}

.nav-cta:hover {
  background-color: #FF6B59;
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 139, 123, 0.4);
}

/* Mobile Menu Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ===========================
   BUTTONS
   =========================== */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  line-height: 1.5;
}

.btn:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--white);
}

.btn-primary:hover {
  background-color: #6FC2E8;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--secondary-coral);
  color: var(--white);
}

.btn-secondary:hover {
  background-color: #FF7464;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--white);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
}

.btn-small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-block {
  display: block;
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ===========================
   HERO SECTION
   =========================== */

.hero {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-mint) 100%);
  color: var(--color-text);
  padding: var(--spacing-xxl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><path fill="%23ffffff" fill-opacity="0.05" d="M0,300 Q300,100 600,300 T1200,300 L1200,600 L0,600 Z"/></svg>') no-repeat center;
  background-size: cover;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: 2.75rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-xl);
  color: var(--text-dark);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.hero-trust-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background-color: rgba(255, 255, 255, 0.9);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-top: var(--spacing-md);
}

.hero-trust-badge::before {
  content: '✓';
  display: inline-block;
  width: 24px;
  height: 24px;
  background-color: var(--accent-mint);
  border-radius: 50%;
  text-align: center;
  line-height: 24px;
  font-weight: 700;
}

/* ===========================
   CARDS
   =========================== */

.card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  height: 100%;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-icon {
  width: 60px;
  height: 60px;
  background-color: var(--neutral-gray);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: var(--font-size-h4);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.card-footer {
  margin-top: auto;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

/* ===========================
   GRID SYSTEM
   =========================== */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* ===========================
   TESTIMONIALS
   =========================== */

.testimonial {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

.testimonial::before {
  content: '"';
  position: absolute;
  top: -10px;
  left: var(--spacing-md);
  font-size: 4rem;
  color: var(--color-primary);
  opacity: 0.2;
  font-family: Georgia, serif;
  line-height: 1;
}

.testimonial-text {
  font-size: 1.125rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.testimonial-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--neutral-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.testimonial-details h4 {
  margin-bottom: var(--spacing-xs);
  font-size: 1rem;
}

.testimonial-details p {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
  margin: 0;
}

/* ===========================
   FAQ ACCORDION
   =========================== */

.faq {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: transparent;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: var(--neutral-gray);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: transform var(--transition-normal);
}

.faq-question.active::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-answer.active {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 var(--spacing-lg) var(--spacing-md);
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ===========================
   FORMS
   =========================== */

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-body);
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--white);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(135, 206, 235, 0.2);
}

.form-input::placeholder {
  color: var(--color-text-light);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  color: #E74C3C;
  font-size: var(--font-size-small);
  margin-top: var(--spacing-xs);
}

.form-input.error {
  border-color: #E74C3C;
}

.form-checkbox,
.form-radio {
  margin-right: var(--spacing-xs);
}

/* ===========================
   FOOTER
   =========================== */

.footer {
  background-color: var(--text-dark);
  color: var(--white);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

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

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

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

.footer-contact p {
  margin-bottom: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.8);
}

.footer-contact a {
  color: var(--color-primary);
  font-weight: 600;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--font-size-small);
}

/* ===========================
   UTILITY CLASSES
   =========================== */

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }
.pt-xl { padding-top: var(--spacing-xl); }

.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }
.pb-xl { padding-bottom: var(--spacing-xl); }

.bg-white { background-color: var(--white); }
.bg-gray { background-color: var(--neutral-gray); }
.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--secondary-coral); }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--secondary-coral); }
.text-muted { color: var(--color-text-light); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

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

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* Skip Navigation Link (Accessibility) */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background-color: var(--color-primary);
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* ===========================
   RESPONSIVE BREAKPOINTS
   =========================== */

@media (max-width: 768px) {
  :root {
    --font-size-h1: 2rem;
    --font-size-h2: 1.75rem;
    --font-size-h3: 1.375rem;
  }

  html {
    font-size: var(--font-size-mobile);
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn-large {
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 1024px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--white);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
  }

  .nav-menu.active {
    transform: translateX(0);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: var(--spacing-md);
  }
}

/* ===========================
   IMAGE OPTIMIZATION & ENHANCEMENT
   =========================== */

/* Professional image rendering */
img {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Hero and feature images */
.section img {
  display: block;
  height: auto;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Subtle hover effect for interactive feeling */
.card img:hover,
.section img:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 32px rgba(0,0,0,0.15) !important;
}

/* Ensure images don't break layout */
img {
  max-width: 100%;
  height: auto;
}

/* Professional image container styles */
.image-container {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

/* Lazy loading appearance */
img[loading="lazy"] {
  background: linear-gradient(135deg, var(--neutral-gray) 0%, var(--neutral-beige) 100%);
}

/* ===========================
   PRINT STYLES
   =========================== */

@media print {
  .navbar,
  .footer,
  .btn,
  .nav-toggle {
    display: none;
  }

  body {
    background-color: white;
    color: black;
  }

  .hero {
    background: none;
    color: black;
  }
}