/* Responsive Design Styles */

/* Mobile First Approach */

/* Base responsive typography */
html {
  font-size: clamp(14px, 2vw, 16px);
}

/* Mobile devices (up to 480px) */
@media (max-width: 480px) {
  /* Hero buttons responsive styling for mobile */
  .hero-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
  }
  
  .hero-buttons .nav-link {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: 1rem;
    margin-bottom: var(--space-xs);
  }
  
  /* Center controls and timer on mobile */
  .horizontal-layout,
  .test-controls-timer-container {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
  }
  
  .practice-controls,
  .test-controls,
  .progress-info,
  .timer-display {
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
  }
  
  #timeRemaining {
    width: 100%;
    text-align: center;
  }
}

/* Desktop optimization for Practice and Test pages */
@media (min-width: 1024px) {
  .typing-practice-container,
  .typing-test-container {
    height: calc(100vh - 150px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }
  
  .typing-text-display {
    max-height: 30vh;
    overflow-y: auto;
  }
  
  .virtual-keyboard-container {
    margin-top: auto;
  }
  
  .horizontal-layout,
  .test-controls-timer-container {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
  }
  
  .practice-controls,
  .test-controls {
    margin-bottom: 0;
  }
}

/* Adaptive container sizing */
.container {
  max-width: min(1200px, 95vw);
  margin: 0 auto;
  padding: 0 clamp(0.5rem, 2vw, 1rem);
}

/* Footer responsive styles */
@media (max-width: 768px) {
  .footer {
    height: auto;
    padding: 15px 0;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 10px;
  }
  
  .footer-links {
    margin-bottom: 5px;
  }
}

@media (max-width: 480px) {
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }
  
  .footer-text {
    text-align: center;
    font-size: 0.8rem;
  }
}

/* Tablet devices (481px - 1023px) */
@media (min-width: 481px) and (max-width: 1023px) {
  .horizontal-layout,
  .test-controls-timer-container {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
  }
  
  .practice-controls,
  .test-controls {
    flex: 0 1 auto;
    min-width: 300px;
    margin: 0 auto;
  }
  
  .progress-info,
  .timer-display {
    flex-shrink: 0;
    margin: 0 auto;
  }
  
  /* Hero buttons responsive styling for tablets */
  .hero-buttons .nav-link {
    padding: var(--space-sm) var(--space-lg);
    font-size: 1rem;
  }
}

/* Small mobile devices (320px - 480px) */
@media (max-width: 480px) {
  .nav-container {
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-sm);
  }
  
  .nav-center {
    order: 3;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }
  
  .nav-right {
    order: 2;
    justify-content: center;
    gap: var(--space-sm);
  }
  
  .hero-title {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }
  
  .hero-subtitle {
    font-size: clamp(0.875rem, 3vw, 1rem);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }
  
  .hero-buttons .btn {
    width: 100%;
    max-width: 250px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .horizontal-layout,
  .practice-controls,
  .test-controls,
  .test-controls-timer-container {
    flex-direction: column;
    gap: var(--space-md);
    align-items: stretch;
  }
  
  .control-group {
    flex-direction: column;
    text-align: center;
    gap: var(--space-xs);
  }
  
  .control-select {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
  }
  
  .stats-compact {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }
  
  .stat-pill {
    min-width: 120px;
    justify-content: center;
  }
  
  .modal-content {
    width: 95%;
    padding: var(--space-lg);
    margin: var(--space-sm);
  }
  
  .modal-buttons {
    flex-direction: column;
  }
  
  .modal-buttons .btn {
    width: 100%;
  }
  
  .page-title {
    font-size: clamp(1.25rem, 4vw, 1.75rem);
  }
}

/* Mobile devices (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
  .nav-container {
    padding: var(--space-md);
  }
  
  .nav-center {
    gap: var(--space-md);
  }
  
  .hero-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .practice-controls,
  .test-controls {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
  }
  
  .stats-overview {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .results-grid {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  
  .stats-compact {
    justify-content: space-around;
  }
  
  .typing-container {
    margin-bottom: var(--space-md);
  }
}

/* Tablet devices (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  .container {
    padding: 0 var(--space-lg);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-overview {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .typing-container {
    margin-bottom: var(--space-xl);
  }
  
  .keyboard-container {
    max-width: min(85vw, 900px);
  }
  
  .practice-controls,
  .test-controls {
    gap: var(--space-xl);
  }
}

/* Desktop devices (1025px+) */
@media (min-width: 1025px) {
  .container {
    padding: 0 var(--space-xl);
  }
  
  .nav-container {
    padding: var(--space-lg) var(--space-xl);
  }
  
  .hero {
    padding: var(--space-3xl) 0;
  }
  
  .features {
    padding: var(--space-3xl) 0;
  }
  
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .typing-text {
    font-size: clamp(1.125rem, 1.5vw, 1.5rem);
  }
  
  .typing-input {
    font-size: clamp(1.125rem, 1.5vw, 1.5rem);
  }
  
  .practice-main,
  .test-main {
    gap: var(--space-lg);
  }
}

/* Large desktop (1440px+) */
@media (min-width: 1440px) {
  .container {
    max-width: 1400px;
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 4vw, 4rem);
  }
  
  .typing-container {
    padding: var(--space-2xl);
  }
  
  .keyboard-container {
    max-width: min(80vw, 1200px);
  }
}

/* Short screens optimization */
@media (max-height: 600px) {
  .header {
    position: sticky;
    top: 0;
    z-index: 100;
  }
  
  .hero {
    padding: var(--space-lg) 0;
  }
  
  .practice-main,
  .test-main {
    padding: 2px var(--space-sm);
    min-height: calc(100vh - 60px);
    gap: 2px;
  }
  
  .typing-container {
    padding: var(--space-sm);
  }
  
  .keyboard-container {
    padding: var(--space-xs);
  }
  
  .key {
    min-height: clamp(20px, 3vh, 32px);
    min-width: clamp(20px, 3vw, 32px);
    font-size: clamp(0.5rem, 1vh, 0.75rem);
  }
  
  .stats-compact {
    gap: var(--space-xs);
  }
  
  .stat-pill {
    padding: var(--space-xs) var(--space-sm);
    font-size: clamp(0.6rem, 1.5vw, 0.75rem);
  }
}

/* Very tall screens */
@media (min-height: 1000px) {
  .practice-main,
  .test-main {
    gap: var(--space-xl);
  }
  
  .typing-container {
    padding: var(--space-2xl);
  }
  
  .keyboard-container {
    padding: var(--space-2xl);
  }
}

/* Aspect ratio optimizations */
@media (aspect-ratio > 16/9) {
  .practice-main,
  .test-main {
    max-width: 1600px;
    margin: 0 auto;
  }
}

@media (aspect-ratio < 4/3) {
  .stats-compact {
    flex-direction: column;
    align-items: center;
  }
  
  .practice-controls,
  .test-controls {
    flex-direction: column;
    align-items: center;
  }
}

/* Print styles */
@media print {
  .header,
  .footer,
  .keyboard-container,
  .modal,
  .achievement-toast {
    display: none !important;
  }
  
  .page-main {
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: none;
    padding: 0;
  }
  
  .stat-card,
  .chart-container,
  .mistyped-section,
  .achievements-section {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --border-light: #000000;
    --border-medium: #000000;
  }
  
  [data-theme="dark"] {
    --border-light: #ffffff;
    --border-medium: #ffffff;
  }
  
  .btn {
    border: 2px solid currentColor;
  }
  
  .stat-pill,
  .stat-card,
  .feature-card {
    border-width: 2px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .fade-in,
  .slide-up {
    animation: none;
  }
  
  .feature-card:hover,
  .stat-card:hover {
    transform: none;
  }
}

/* Focus styles for accessibility */
.nav-link:focus,
.btn:focus,
.form-input:focus,
.form-textarea:focus,
.language-select:focus,
.control-select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Skip to main content */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background-color: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 6px;
}

/* Tooltip styles for help text */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltip-text {
  visibility: hidden;
  width: 200px;
  background-color: var(--color-gray-800);
  color: white;
  text-align: center;
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  font-size: var(--font-size-xs);
  position: absolute;
  z-index: 1001;
  bottom: 125%;
  left: 50%;
  margin-left: -100px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* Loading states */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-200);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: var(--space-lg) auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
/* Dynamic viewport units for better mobile support */
@supports (height: 100dvh) {
  .practice-main,
  .test-main {
    min-height: calc(100dvh - 80px);
  }
}

@supports (height: 100svh) {
  @media (max-height: 600px) {
    .practice-main,
    .test-main {
      min-height: calc(100svh - 60px);
    }
  }
}