/* Critical Performance CSS for CasinoRankr
 * Optimized for sub-200ms INP target
 * Contains only essential above-the-fold styles
 */

/* ===== CRITICAL CSS VARIABLES ===== */
:root {
  --primary-color: #4a9fff;
  --primary-dark: #3a7fca;
  --secondary-color: #d4af37;
  --bg-color: #0d1117;
  --bg-light: #161b22;
  --text-color: #e6edf3;
  --text-muted: #c9d1d9;
  --border-color: #30363d;
  --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
  --space-sm: 10px;
  --space-md: 15px;
  --space-lg: 20px;
  --space-xl: 32px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --header-height: 70px;
  --container-max-width: 1400px;
}

/* ===== CRITICAL GLOBAL STYLES ===== */
* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Roboto', sans-serif;
  background-color: var(--bg-color);
  margin: 0;
  padding: 0;
  color: var(--text-color);
  line-height: 1.6;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

/* ===== CRITICAL HEADER STYLES ===== */
.main-header {
  background-color: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0;
  position: fixed;
  top: 0;
  z-index: 1000;
  width: 100%;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  height: var(--header-height);
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform;
}

.header-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0;
  width: 100%;
  height: 100%;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 0 var(--space-lg);
  background: none !important;
  height: 100%;
}

/* ===== CRITICAL INTERACTION STYLES ===== */
.voting button,
.play-now-button,
.signup-button,
.casino-cta,
.location-casino-btn {
  min-width: 44px;
  min-height: 44px;
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform;
  transition: transform 0.08s ease, background-color 0.15s ease, opacity 0.1s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-transform: translateZ(0);
  -moz-transform: translateZ(0);
  -ms-transform: translateZ(0);
  transform: translateZ(0);
  position: relative;
  overflow: hidden;
}

/* JavaScript-controlled interaction states */
.touch-active {
  transform: scale(0.98) translateZ(0) !important;
  transition: transform 0.05s ease !important;
}

.click-active {
  transform: scale(0.95) translateZ(0) !important;
  transition: transform 0.08s ease !important;
  background-color: rgba(74, 159, 255, 0.1) !important;
}

.focus-active {
  outline: 2px solid var(--primary-color) !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 4px rgba(74, 159, 255, 0.1) !important;
}

.keyboard-active {
  transform: scale(0.97) translateZ(0) !important;
  transition: transform 0.06s ease !important;
  background-color: rgba(74, 159, 255, 0.15) !important;
}

/* ===== CRITICAL CASINO CARD STYLES ===== */
.casino {
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  contain: layout style paint;
}

.casino.touch-active {
  transform: scale(0.99) translateZ(0) !important;
  transition: transform 0.05s ease !important;
}

.casino.click-active {
  transform: scale(0.97) translateZ(0) !important;
  transition: transform 0.08s ease !important;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2) !important;
}

.casino.focus-active {
  outline: 2px solid var(--primary-color) !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 4px rgba(74, 159, 255, 0.1) !important;
}

/* ===== CRITICAL VOTING STYLES ===== */
.voting button {
  will-change: transform, opacity;
  contain: layout style paint;
}

.voting button.touch-active {
  transform: scale(0.96) translateZ(0) !important;
  transition: transform 0.05s ease !important;
}

.voting button.click-active {
  transform: scale(0.92) translateZ(0) !important;
  transition: transform 0.08s ease !important;
  background-color: rgba(74, 159, 255, 0.15) !important;
}

.voting button.focus-active {
  outline: 2px solid var(--primary-color) !important;
  outline-offset: 2px !important;
  box-shadow: 0 0 0 4px rgba(74, 159, 255, 0.1) !important;
}

.voting button.keyboard-active {
  transform: scale(0.94) translateZ(0) !important;
  transition: transform 0.06s ease !important;
  background-color: rgba(74, 159, 255, 0.2) !important;
}

/* ===== CRITICAL FORM STYLES ===== */
select,
input[type="search"],
input[type="text"] {
  transform: translateZ(0);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  min-height: 44px;
  padding: 12px 16px;
  font-size: 16px;
  -webkit-transform: translateZ(0);
  -moz-transform: translateZ(0);
  -ms-transform: translateZ(0);
  transform: translateZ(0);
  contain: layout style paint;
}

select:focus,
input[type="search"]:focus,
input[type="text"]:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 159, 255, 0.1);
}

/* ===== NEW HOMEPAGE SECTIONS ===== */

/* Why Choose Us Section */
.why-choose-section {
  padding: 60px 0;
  background: linear-gradient(135deg, #161b22 0%, #1a2233 100%);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.why-choose-section h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
  font-size: 2.5rem;
  color: var(--text-color);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.benefit-item {
  background: linear-gradient(145deg, #0d1117 0%, #161b22 100%);
  padding: 30px 25px;
  border-radius: var(--radius-lg);
  border: 1px solid #30363d;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.benefit-item:hover {
  transform: translateY(-4px) translateZ(0);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  border-color: #4a9fff;
}

.benefit-item h3 {
  color: var(--secondary-color);
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
}

.benefit-item p {
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Popular Categories Section */
.categories-section {
  padding: 60px 0;
  background: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #0d1117 100%);
  border-top: 1px solid var(--border-color);
}

.categories-section h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
  font-size: 2.5rem;
  color: var(--text-color);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.category-item {
  background: linear-gradient(145deg, #161b22 0%, #1a2233 100%);
  padding: 30px 25px;
  border-radius: var(--radius-lg);
  border: 1px solid #30363d;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.category-item:hover {
  transform: translateY(-4px) translateZ(0);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  border-color: #d4af37;
}

.category-item h3 {
  color: var(--primary-color);
  margin-bottom: var(--space-md);
  font-size: 1.5rem;
}

.category-item p {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.category-link {
  display: inline-block;
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s ease;
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: transform;
}

.category-link:hover {
  color: var(--primary-color);
  transform: translateX(5px) translateZ(0);
}

.category-link.disabled {
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.6;
}

.category-link.disabled:hover {
  transform: none;
  color: var(--text-muted);
}

/* ===== CRITICAL MOBILE OPTIMIZATIONS ===== */
@media (max-width: 768px) {
  .voting button,
  .play-now-button,
  .signup-button,
  .casino-cta {
    min-width: 48px;
    min-height: 48px;
    padding: 12px;
    transition: transform 0.06s ease, background-color 0.12s ease;
  }
  
  .casino {
    transition: transform 0.12s ease, box-shadow 0.12s ease;
  }
  
  select,
  input[type="search"] {
    min-height: 48px;
    font-size: 16px;
    padding: 14px 16px;
  }
  
  .touch-active {
    transform: scale(0.97) translateZ(0) !important;
    transition: transform 0.04s ease !important;
  }
  
  .click-active {
    transform: scale(0.93) translateZ(0) !important;
    transition: transform 0.06s ease !important;
  }
  
  .keyboard-active {
    transform: scale(0.95) translateZ(0) !important;
    transition: transform 0.05s ease !important;
  }
  
  /* Mobile responsive grids */
  .benefits-grid,
  .categories-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    padding: 0 var(--space-md);
  }
  
  .why-choose-section h2,
  .categories-section h2 {
    font-size: 2rem;
    margin-bottom: var(--space-lg);
  }
  
  .benefit-item,
  .category-item {
    padding: var(--space-md);
  }
}

@media (max-width: 480px) {
  .voting button,
  .play-now-button,
  .signup-button,
  .casino-cta {
    min-width: 44px;
    min-height: 44px;
    padding: 10px;
    transition: transform 0.05s ease, background-color 0.1s ease;
  }
  
  .voting button:active,
  .play-now-button:active,
  .signup-button:active,
  .casino-cta:active {
    transform: scale(0.95) translateZ(0);
    transition: transform 0.02s ease;
  }
  
  .touch-active {
    transform: scale(0.98) translateZ(0) !important;
    transition: transform 0.03s ease !important;
  }
  
  .click-active {
    transform: scale(0.94) translateZ(0) !important;
    transition: transform 0.05s ease !important;
  }
  
  .keyboard-active {
    transform: scale(0.96) translateZ(0) !important;
    transition: transform 0.04s ease !important;
  }
  
  .why-choose-section h2,
  .categories-section h2 {
    font-size: 1.75rem;
  }
}

/* ===== CRITICAL ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .voting button:active,
  .play-now-button:active,
  .signup-button:active,
  .casino-cta:active,
  .touch-active,
  .click-active,
  .keyboard-active {
    transform: none;
    transition: none;
  }
}

@media (prefers-contrast: high) {
  .voting button,
  .play-now-button,
  .signup-button,
  .casino-cta {
    border: 2px solid currentColor;
    background-color: transparent;
    color: currentColor;
  }
  
  .voting button:focus-visible,
  .play-now-button:focus-visible,
  .signup-button:focus-visible,
  .casino-cta:focus-visible,
  .focus-active {
    outline: 3px solid currentColor;
    outline-offset: 2px;
  }
}

/* ===== CRITICAL FOCUS MANAGEMENT ===== */
button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  transition: outline 0.1s ease;
}

button:focus:not(:focus-visible),
select:focus:not(:focus-visible),
input:focus:not(:focus-visible) {
  outline: none;
}

/* ===== CRITICAL LAYOUT CONTAINER ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

main#mainContent.container {
  margin-top: calc(var(--header-height) + var(--space-lg));
  min-height: calc(100vh - var(--header-height));
}

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