/* GreenHOMEnergy Website - Accessibility Styles */
/* WCAG 2.1 AA Compliance */

/* High Contrast Support */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #000000;
    --secondary-color: #333333;
    --accent-color: #0066cc;
    --text-color: #000000;
    --text-light: #333333;
    --background-color: #ffffff;
    --border-color: #000000;
  }
  
  .btn {
    border: 2px solid currentColor;
    font-weight: 700;
  }
  
  .card {
    border: 2px solid var(--border-color);
  }
  
  .nav-link {
    border: 1px solid transparent;
  }
  
  .nav-link:focus,
  .nav-link:hover {
    border-color: var(--accent-color);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .hero-video {
    display: none;
  }
  
  .card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}

/* Focus Management */
*:focus {
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
}

/* Enhanced focus for interactive elements */
.btn:focus,
.nav-link:focus,
.form-input:focus,
.form-textarea:focus,
.theme-dropdown:focus {
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 6px rgba(127, 176, 105, 0.2);
}

/* Skip Links */
.skip-links {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 9999;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  transition: top 0.3s;
  transform: translateY(-100%);
}

.skip-link:focus {
  top: 6px;
  transform: translateY(0);
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
}

/* Screen Reader Only Content */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.sr-only-focusable:focus {
  position: static !important;
  width: auto !important;
  height: auto !important;
  padding: inherit !important;
  margin: inherit !important;
  overflow: visible !important;
  clip: auto !important;
  white-space: normal !important;
}

/* Color Contrast Enhancements */
.text-contrast-high {
  color: var(--text-color);
  font-weight: 600;
}

/* Link Accessibility */
a:not(.btn):hover,
a:not(.btn):focus {
  text-decoration-thickness: 3px;
}

/* Button Accessibility */
.btn {
  min-height: 44px;
  min-width: 44px;
  font-weight: 600;
  position: relative;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn[aria-pressed="true"] {
  background-color: var(--primary-color);
  color: white;
}

/* Form Accessibility */
.form-group {
  position: relative;
}

.form-label {
  font-weight: 600;
  color: var(--text-color);
}

.form-input:invalid,
.form-textarea:invalid {
  border-color: #dc2626;
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-error {
  color: #dc2626;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  display: block;
}

.form-input[aria-invalid="true"],
.form-textarea[aria-invalid="true"] {
  border-color: #dc2626;
}

/* Required field indicators */
.required::after {
  content: " *";
  color: #dc2626;
  font-weight: bold;
}

/* Navigation Accessibility */
.nav-menu {
  list-style: none;
}

.nav-link {
  display: block;
  text-decoration: none;
  font-weight: 500;
}

.nav-link[aria-current="page"] {
  background-color: var(--accent-color);
  color: white;
  font-weight: 700;
}

/* Mobile Menu Accessibility */
.mobile-menu-toggle {
  background: none;
  border: 2px solid var(--primary-color);
  border-radius: 4px;
  padding: 8px;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

.mobile-menu-toggle:focus {
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
}

.mobile-menu-toggle[aria-expanded="true"] {
  background-color: var(--primary-color);
  color: white;
}

/* Hamburger icon accessibility */
.hamburger {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: absolute;
  transition: var(--transition);
}

.hamburger::before {
  top: -6px;
}

.hamburger::after {
  top: 6px;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger {
  background: transparent;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg);
  top: 0;
}

/* Card Accessibility */
.card {
  position: relative;
}

.card-link {
  text-decoration: none;
  color: inherit;
}

.card-link::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.card-link:focus {
  outline: none;
}

.card-link:focus .card {
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
}

/* Table Accessibility */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: var(--card-background);
  font-weight: 600;
  color: var(--text-color);
}

/* Image Accessibility */
img {
  max-width: 100%;
  height: auto;
}

img:not([alt]) {
  outline: 3px solid #dc2626;
}

/* Video Accessibility */
video {
  max-width: 100%;
  height: auto;
}

.video-controls {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.video-control-btn {
  min-height: 44px;
  min-width: 44px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
}

/* Loading States */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--accent-color);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .loading::after {
    animation: none;
    border-top-color: var(--accent-color);
  }
}

/* Error States */
.error {
  color: #dc2626;
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  padding: 1rem;
  border-radius: var(--border-radius);
  margin: 1rem 0;
}

.error-icon {
  color: #dc2626;
  margin-right: 0.5rem;
}

/* Success States */
.success {
  color: #065f46;
  background-color: #ecfdf5;
  border: 1px solid #a7f3d0;
  padding: 1rem;
  border-radius: var(--border-radius);
  margin: 1rem 0;
}

.success-icon {
  color: #065f46;
  margin-right: 0.5rem;
}

/* Warning States */
.warning {
  color: #92400e;
  background-color: #fffbeb;
  border: 1px solid #fed7aa;
  padding: 1rem;
  border-radius: var(--border-radius);
  margin: 1rem 0;
}

.warning-icon {
  color: #92400e;
  margin-right: 0.5rem;
}

/* Tooltip Accessibility */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip-content {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--primary-color);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.875rem;
  white-space: nowrap;
  z-index: 1000;
  transition: var(--transition);
}

.tooltip:hover .tooltip-content,
.tooltip:focus .tooltip-content {
  visibility: visible;
  opacity: 1;
}

/* Print Accessibility */
@media print {
  .skip-links,
  .mobile-menu-toggle,
  .video-controls {
    display: none !important;
  }
  
  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
  
  .card {
    border: 1px solid #000;
    page-break-inside: avoid;
  }
}