/* USACS Patient Experience - AAA Accessible Styles */

/* CSS Custom Properties for USACS Brand */
:root {
  --usacs-red: #ce0e2d;
  --usacs-red-dark: #a00b24;
  --usacs-gray: #898a8d;
  --usacs-dark-gray: #333333;
  --usacs-light-gray: #f5f5f5;
  --usacs-white: #ffffff;
  --usacs-black: #000000;

  /* AAA Compliant text colors - 7:1 contrast ratio minimum */
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-on-red: #ffffff;

  /* Focus states for accessibility */
  --focus-outline: 3px solid #005fcc;
  --focus-offset: 2px;

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

  /* Typography - minimum 16px base for accessibility */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;

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

  /* Max content width */
  --max-width: 1200px;
  --content-width: 800px;
}

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

html {
  font-size: 100%; /* Respect user's browser settings */
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--text-primary);
  background-color: var(--usacs-white);
}

/* Focus styles for all interactive elements */
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus,
[tabindex]:focus {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

/* Remove default focus for mouse users, keep for keyboard */
:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-heading);
  color: var(--text-primary);
  font-weight: 700;
}

h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--usacs-red);
}

h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--spacing-lg);
}

p {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
}

/* Links - AAA compliant with underline for identification */
a {
  font-size: 18px;
  color: var(--usacs-red);
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (max-width: 768px) {
  a {
    font-size: 16px;
  }
}

a:hover {
  color: var(--usacs-red-dark);
  text-decoration-thickness: 2px;
}

a:visited {
  color: #6b0a1a;
}

/* Header */
.site-header {
  background-color: var(--usacs-white);
  border-bottom: 1px solid #e0e0e0;
  padding: var(--spacing-sm) var(--spacing-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
}

.logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.logo-link:hover {
  opacity: 0.9;
}

.site-logo {
  height: 50px;
  width: auto;
}

/* Main Content */
main {
  min-height: calc(100vh - 200px);
}

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

.navigation-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    list-style: none;
    flex-wrap: wrap;
    padding: 0 var(--spacing-md) 10px var(--spacing-md);
    border-bottom: 1px solid #e0e0e0;
}

@media (max-width: 768px) {
    .navigation-links {
        gap: 1.6rem;
        padding: 0 var(--spacing-md) 20px var(--spacing-md);
    }
}

.content-container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

/* Hero Section */
.hero {
  background-color: var(--usacs-light-gray);
  padding: var(--spacing-xxl) var(--spacing-md);
  text-align: center;
}

.hero h1 {
  color: var(--usacs-red);
  margin-bottom: var(--spacing-md);
}

.hero-intro {
  font-size: var(--font-size-lg);
  max-width: 700px;
  margin: 0 auto;
}

/* Content Sections with alternating layout */
.content-section {
  padding: var(--spacing-xl) var(--spacing-md);
  scroll-margin-top: 50px;
}

.content-section:nth-child(even) {
  background-color: var(--usacs-light-gray);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

@media (min-width: 768px) {
  .section-inner {
    grid-template-columns: 1fr 1fr;
  }

  .section-inner.reverse {
    direction: rtl;
  }

  .section-inner.reverse > * {
    direction: ltr;
  }
}

.section-image {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 8px;
  margin: 0 auto;
  display: block;
}

.section-content h2 {
  margin-top: 0;
}

/* Lists */
ul, ol {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}

.btn-primary {
  background-color: var(--usacs-red);
  color: var(--text-on-red);
  border-color: var(--usacs-red);
}

.btn-primary:hover {
  background-color: var(--usacs-red-dark);
  border-color: var(--usacs-red-dark);
  color: var(--text-on-red);
}

.btn-primary:visited {
  color: var(--text-on-red);
}

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

.btn-secondary:hover {
  background-color: var(--usacs-red);
  color: var(--text-on-red);
}

/* FAQ Accordion */
.faq-section {
  margin-bottom: var(--spacing-xl);
}

.faq-section h2 {
  border-bottom: 2px solid var(--usacs-red);
  padding-bottom: var(--spacing-sm);
}

.faq-item {
  border-bottom: 1px solid #e0e0e0;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: var(--spacing-md) 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
}

.faq-question:hover {
  color: var(--usacs-red);
}

.faq-question::after {
  content: "+";
  font-size: var(--font-size-xl);
  font-weight: 400;
  color: var(--usacs-red);
  transition: transform 0.2s;
}

.faq-question[aria-expanded="true"]::after {
  content: "−";
}

.faq-answer {
  padding: 0 0 var(--spacing-md) 0;
  display: none;
}

.faq-answer.open {
  display: block;
}

/* Footer */
.site-footer {
  background-color: var(--usacs-dark-gray);
  color: var(--usacs-white);
  padding: var(--spacing-xl) var(--spacing-md);
}

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

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm) var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  padding: 0;
  list-style: none;
}

@media (max-width: 600px) {
  .footer-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

.footer-links a {
  color: var(--usacs-white);
  text-decoration: underline;
  font-size: var(--font-size-sm);
}

.footer-links a:hover {
  color: #cccccc;
}

.footer-links a:visited {
  color: #e0e0e0;
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: #cccccc;
  border-top: 1px solid #555555;
  padding-top: var(--spacing-md);
  margin-top: var(--spacing-md);
}

/* Legal/Content Pages */
.legal-page {
  padding: var(--spacing-xl) var(--spacing-md);
}

.legal-page h1 {
  color: var(--usacs-red);
  border-bottom: 2px solid var(--usacs-red);
  padding-bottom: var(--spacing-sm);
}

.legal-content {
  max-width: var(--content-width);
  margin: 0 auto;
}

.legal-content h2 {
  font-size: var(--font-size-xl);
  margin-top: var(--spacing-xl);
}

.legal-content h3 {
  font-size: var(--font-size-lg);
  margin-top: var(--spacing-lg);
}

/* Contact Info blocks */
.contact-block {
  background-color: var(--usacs-light-gray);
  padding: var(--spacing-md);
  border-radius: 4px;
  margin: var(--spacing-md) 0;
}

.contact-block p {
  margin: var(--spacing-xs) 0;
}

/* Modal for external links */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--usacs-white);
  padding: var(--spacing-lg);
  border-radius: 8px;
  max-width: 500px;
  width: 90%;
  text-align: center;
}

.modal h2 {
  margin-top: 0;
  color: var(--text-primary);
}

.modal-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-lg);
}

/* Tables for AAA accessibility */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
}

th, td {
  padding: var(--spacing-sm);
  text-align: left;
  border-bottom: 1px solid #e0e0e0;
}

th {
  background-color: var(--usacs-light-gray);
  font-weight: 600;
}

/* Utility classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

/* Print styles */
@media print {
  .site-header,
  .site-footer {
    display: none;
  }

  main {
    padding: 0;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }
}