/* 无障碍支持样式 */

.skip-link {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  z-index: -1;
}

.keyboard-navigation .skip-link:focus {
  position: fixed;
  top: 10px;
  left: 10px;
  width: auto;
  height: auto;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--primary-color);
  color: var(--text-white);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  font-size: var(--font-size-sm);
  opacity: 1;
  z-index: 9999;
  outline: 2px solid var(--text-white);
  outline-offset: 2px;
}

*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  outline-style: solid;
}

button:focus,
.game-btn:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 1px var(--bg-white), 0 0 0 4px var(--primary-color);
}

input:focus,
textarea:focus,
select:focus,
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 1px;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(255, 123, 139, 0.2);
}

a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  background-color: rgba(255, 123, 139, 0.1);
  border-radius: 2px;
}

@media (prefers-contrast: high) {
  :root {
    --primary-color: #000000;
    --secondary-color: #000000;
    --text-dark: #000000;
    --text-medium: #000000;
    --text-light: #666666;
    --bg-white: #ffffff;
    --bg-light: #f0f0f0;
    --border-color: #000000;
    --shadow-small: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 8px rgba(0, 0, 0, 0.3);
    --shadow-large: 0 8px 16px rgba(0, 0, 0, 0.3);
  }

  .game-card,
  .scenario-card,
  .form-input,
  .form-textarea,
  .form-select,
  .game-btn {
    border: 2px solid var(--text-dark);
  }

  .game-btn {
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: 3px solid var(--text-dark);
  }

  .game-btn:hover,
  .game-btn:focus {
    background-color: var(--text-dark);
    color: var(--bg-white);
  }

  a {
    color: var(--text-dark);
    text-decoration: underline;
  }

  a:hover,
  a:focus {
    background-color: var(--text-dark);
    color: var(--bg-white);
  }
}

@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;
  }

  .game-card:hover,
  .scenario-card:hover,
  .game-btn:hover {
    transform: none !important;
  }

  *:focus {
    transition: none !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: 0;
}

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

.keyboard-navigation *:focus {
  outline: 3px solid var(--primary-color);
  outline-offset: 2px;
}

.touch-device *:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.error,
.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--danger-color);
  outline-color: var(--danger-color);
}

.error:focus,
.form-input.error:focus,
.form-textarea.error:focus,
.form-select.error:focus {
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2);
}

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

.success:focus,
.form-input.success:focus,
.form-textarea.success:focus,
.form-select.success:focus {
  box-shadow: 0 0 0 3px rgba(93, 226, 144, 0.2);
}

[disabled],
.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

[disabled]:focus,
.disabled:focus {
  outline: 2px dashed var(--text-light);
  outline-offset: 2px;
}

.loading {
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--primary-color);
  border-top: 2px solid transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .loading::after {
    animation: none;
    border: 2px solid var(--primary-color);
    border-radius: 0;
    width: 1rem;
    height: 1rem;
  }
}

.game-notification.error {
  border-left: 4px solid var(--danger-color);
  background-color: rgba(255, 107, 107, 0.1);
}

.game-notification.success {
  border-left: 4px solid var(--success-color);
  background-color: rgba(93, 226, 144, 0.1);
}

.game-notification.warning {
  border-left: 4px solid var(--warning-color);
  background-color: rgba(255, 159, 28, 0.1);
}

.game-notification.info {
  border-left: 4px solid var(--info-color);
  background-color: rgba(123, 140, 255, 0.1);
}

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

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

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

@media (prefers-contrast: high) {

  th,
  td {
    border: 2px solid var(--text-dark);
  }

  th {
    background-color: var(--text-dark);
    color: var(--bg-white);
  }
}

@media (max-width: 29.9375rem) {
  .skip-link {
    font-size: var(--font-size-base);
    padding: var(--spacing-md) var(--spacing-lg);
  }

  *:focus {
    outline-width: 3px;
    outline-offset: 3px;
  }

  button:focus,
  .game-btn:focus {
    outline-width: 4px;
    outline-offset: 3px;
  }
}

@media print {

  .skip-link,
  .sr-only {
    display: none;
  }

  *:focus {
    outline: none;
  }

  .game-card,
  .scenario-card {
    border: 1px solid #000;
    break-inside: avoid;
  }
}