/* ==========================================================================
   Ohio Valley Digital - Professional Web Design
   ========================================================================== */

/* CSS Custom Properties (Variables) */
:root {
  /* Color Palette */
  --primary-50: #f8fafc;
  --primary-100: #f1f5f9;
  --primary-200: #e2e8f0;
  --primary-300: #cbd5e1;
  --primary-400: #94a3b8;
  --primary-500: #64748b;
  --primary-600: #475569;
  --primary-700: #334155;
  --primary-800: #1e293b;
  --primary-900: #0f172a;
  
  /* Accent Colors */
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;
  --accent-orange: #f59e0b;
  
  /* Semantic Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ==========================================================================
   Base Styles & Reset
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  line-height: 1.6;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--primary-800);
  background-color: var(--primary-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--spacing-md) 0;
  color: var(--primary-900);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--primary-600);
}

a {
  color: var(--primary-800);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-600);
}

/* ==========================================================================
   Animations & Keyframes
   ========================================================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn 0.8s ease-out both;
}

.animate-slide-up {
  animation: slideUp 0.6s ease-out both;
}

.animate-bounce-in {
  animation: bounceIn 0.8s ease-out both;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Staggered Animation Delays */
.animate-delay-100 { animation-delay: 100ms; }
.animate-delay-200 { animation-delay: 200ms; }
.animate-delay-300 { animation-delay: 300ms; }
.animate-delay-400 { animation-delay: 400ms; }
.animate-delay-500 { animation-delay: 500ms; }

/* ==========================================================================
   Form Styles
   ========================================================================== */

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

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--primary-700);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--primary-800);
  background-color: var(--primary-50);
  border: 2px solid var(--primary-200);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  font-family: inherit;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-800);
  background-color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--primary-400);
  font-weight: 400;
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* Form Validation States */
.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--error);
  background-color: #fef2f2;
}

.form-input.success,
.form-textarea.success,
.form-select.success {
  border-color: var(--success);
  background-color: #f0fdf4;
}

.error-message {
  color: var(--error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.success-message {
  color: var(--success);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* ==========================================================================
   Button Styles
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: inherit;
  line-height: 1;
  white-space: nowrap;
  user-select: none;
}

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

.btn-primary {
  background-color: var(--primary-800);
  color: white;
  border-color: var(--primary-800);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-700);
  border-color: var(--primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-600);
  border-color: var(--primary-300);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--primary-50);
  color: var(--primary-800);
  border-color: var(--primary-400);
  transform: translateY(-2px);
}

.btn-ghost {
  background-color: transparent;
  color: var(--primary-600);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--primary-50);
  color: var(--primary-800);
  transform: translateY(-2px);
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: var(--font-size-lg);
}

/* ==========================================================================
   Card & Container Styles
   ========================================================================== */

.card {
  background-color: white;
  border: 2px solid var(--primary-200);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--primary-300);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

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

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--primary-900);
  margin-bottom: var(--spacing-sm);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--primary-500);
  font-weight: 500;
}

/* ==========================================================================
   Badge & Tag Styles
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-xl);
  border: 2px solid;
}

.badge-primary {
  background-color: var(--primary-100);
  color: var(--primary-700);
  border-color: var(--primary-300);
}

.badge-blue {
  background-color: #dbeafe;
  color: var(--accent-blue);
  border-color: #93c5fd;
}

.badge-green {
  background-color: #dcfce7;
  color: var(--accent-green);
  border-color: #86efac;
}

.badge-purple {
  background-color: #f3e8ff;
  color: var(--accent-purple);
  border-color: #c4b5fd;
}

/* ==========================================================================
   Progress Bar
   ========================================================================== */

.progress-container {
  width: 100%;
  background-color: var(--primary-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  height: 8px;
}

.progress-bar {
  height: 100%;
  background-color: var(--primary-800);
  border-radius: var(--radius-xl);
  transition: width var(--transition-slow) ease-out;
  position: relative;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */

.faq-item {
  background-color: white;
  border: 2px solid var(--primary-200);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.faq-item:hover {
  border-color: var(--primary-300);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.faq-button {
  width: 100%;
  padding: var(--spacing-lg);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--primary-900);
  transition: color var(--transition-fast);
}

.faq-button:hover {
  color: var(--primary-700);
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--primary-600);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow) ease-out;
  border-top: 1px solid var(--primary-100);
}

.faq-content.active {
  max-height: 200px;
  padding: var(--spacing-lg);
}

.faq-content p {
  color: var(--primary-600);
  line-height: 1.7;
  margin: 0;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* Text utilities */
.text-gradient {
  background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-600) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Spacing utilities */
.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* Display utilities */
.hidden { display: none !important; }
.block { display: block !important; }
.inline-block { display: inline-block !important; }
.flex { display: flex !important; }
.inline-flex { display: inline-flex !important; }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Z-index utilities */
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.5rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
  }
  
  .card {
    padding: var(--spacing-lg);
  }
  
  .btn {
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  
  .faq-button {
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.25rem;
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .btn,
  .faq-button,
  .progress-container {
    display: none !important;
  }
  
  .card {
    border: 1px solid #ccc;
    box-shadow: none;
    break-inside: avoid;
  }
  
  body {
    background: white;
    color: black;
  }
}

/* ==========================================================================
   Accessibility Improvements
   ========================================================================== */

/* Focus styles for keyboard navigation */
.btn:focus,
.form-input:focus,
.form-textarea:focus,
.form-select:focus,
.faq-button:focus {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --primary-200: #000;
    --primary-300: #333;
    --primary-600: #666;
    --primary-800: #000;
  }
  
  .card {
    border-width: 3px;
  }
  
  .btn {
    border-width: 3px;
  }
}

/* ==========================================================================
   Loading States
   ========================================================================== */

.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--primary-300);
  border-top-color: var(--primary-800);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* ==========================================================================
   Custom Scrollbar
   ========================================================================== */

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--primary-100);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-300);
  border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-400);
}