/* 可访问性样式 - accessibility.css */

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --secondary-color: #ffffff;
        --accent-color: #ffff00;
        --text-color: #000000;
        --bg-color: #ffffff;
        --border-color: #000000;
    }
    
    .chart-container,
    .interactive-element,
    .button,
    .card {
        border: 2px solid #000000 !important;
    }
    
    .data-point,
    .chart-bar,
    .chart-pie-slice {
        stroke: #000000 !important;
        stroke-width: 2px !important;
    }
    
    .tooltip {
        background: #000000 !important;
        color: #ffffff !important;
        border: 2px solid #ffffff !important;
    }
}

/* 减少动画 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .animate-bounce,
    .animate-float,
    .animate-pulse,
    .animate-glow {
        animation: none !important;
    }
    
    .interactive-element:hover {
        transform: none !important;
    }
    
    .reveal .slides section {
        transition: opacity 0.1s ease !important;
    }
}

/* 焦点指示器 */
.interactive-element:focus,
.button:focus,
.chart-control-btn:focus,
.selector-btn:focus,
.zoom-btn:focus,
.toolbar-btn:focus {
    outline: 3px solid #2E86AB !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 4px rgba(46, 134, 171, 0.3) !important;
}

.interactive-element:focus-visible,
.button:focus-visible {
    outline: 3px solid #2E86AB !important;
    outline-offset: 2px !important;
}

/* 键盘导航高亮 */
.keyboard-navigation .interactive-element:focus,
.keyboard-navigation .button:focus,
.keyboard-navigation .chart-control-btn:focus {
    background-color: rgba(46, 134, 171, 0.2) !important;
    border-color: #2E86AB !important;
}

/* 屏幕阅读器专用内容 */
.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;
}

/* 跳过链接 */
.skip-link {
    position: absolute !important;
    top: -40px !important;
    left: 6px !important;
    background: #000000 !important;
    color: #ffffff !important;
    padding: 8px !important;
    text-decoration: none !important;
    border-radius: 0 0 4px 4px !important;
    z-index: 9999 !important;
    transition: top 0.3s ease !important;
}

.skip-link:focus {
    top: 0 !important;
}

/* 语义化标题 */
.semantic-heading {
    margin: 0;
    padding: 0;
    font-weight: bold;
    line-height: 1.2;
}

.semantic-heading.h1 {
    font-size: 2.5em;
}

.semantic-heading.h2 {
    font-size: 2em;
}

.semantic-heading.h3 {
    font-size: 1.5em;
}

.semantic-heading.h4 {
    font-size: 1.25em;
}

/* 色盲友好色彩方案 */
.colorblind-friendly {
    --color-primary: #1f77b4;
    --color-secondary: #ff7f0e;
    --color-success: #2ca02c;
    --color-warning: #d62728;
    --color-info: #9467bd;
    --color-danger: #8c564b;
}

.colorblind-friendly .data-series-1 {
    fill: #1f77b4;
    stroke: #1f77b4;
}

.colorblind-friendly .data-series-2 {
    fill: #ff7f0e;
    stroke: #ff7f0e;
}

.colorblind-friendly .data-series-3 {
    fill: #2ca02c;
    stroke: #2ca02c;
}

.colorblind-friendly .data-series-4 {
    fill: #d62728;
    stroke: #d62728;
}

.colorblind-friendly .data-series-5 {
    fill: #9467bd;
    stroke: #9467bd;
}

/* 色盲友好模式下的图案填充 */
.colorblind-friendly .pattern-diagonal {
    fill: url(#diagonalHatch1);
}

.colorblind-friendly .pattern-dots {
    fill: url(#dotPattern1);
}

.colorblind-friendly .pattern-crosshatch {
    fill: url(#crossHatch1);
}

.colorblind-friendly .pattern-vertical {
    fill: url(#verticalHatch1);
}

.colorblind-friendly .pattern-horizontal {
    fill: url(#horizontalHatch1);
}

/* 大字体模式 */
.text-large {
    font-size: 1.25em !important;
}

.text-xlarge {
    font-size: 1.5em !important;
}

.text-xxlarge {
    font-size: 2em !important;
}

/* 可读性增强 */
.readable-text {
    line-height: 1.6 !important;
    letter-spacing: 0.5px !important;
    word-spacing: 1px !important;
}

.readable-text h1,
.readable-text h2,
.readable-text h3 {
    margin-bottom: 1em !important;
}

.readable-text p {
    margin-bottom: 1.5em !important;
}

/* 触摸目标大小 */
.touch-target {
    min-width: 44px !important;
    min-height: 44px !important;
    padding: 12px !important;
}

.touch-target-small {
    min-width: 32px !important;
    min-height: 32px !important;
    padding: 8px !important;
}

/* 状态指示器（非颜色依赖） */
.status-indicator {
    position: relative;
}

.status-indicator::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.status-indicator.success::before {
    background-color: #4CAF50;
}

.status-indicator.warning::before {
    background-color: #FF9800;
}

.status-indicator.error::before {
    background-color: #F44336;
}

.status-indicator.info::before {
    background-color: #2196F3;
}

/* 文本替代图标 */
.icon-text {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.icon-text::before {
    content: attr(data-icon);
    font-size: 1.2em;
    speak: none;
}

/* 键盘快捷键提示 */
.keyboard-shortcut {
    background: #f0f0f0;
    border: 1px solid #ccc;
    border-radius: 3px;
    padding: 2px 6px;
    font-family: monospace;
    font-size: 0.9em;
    white-space: nowrap;
}

/* 语音播报支持 */
[aria-live] {
    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;
}

/* 错误处理 */
.error-boundary {
    padding: 16px;
    background: #ffebee;
    border: 2px solid #f44336;
    border-radius: 8px;
    color: #c62828;
    font-weight: bold;
}

.error-boundary:focus {
    outline: 3px solid #f44336;
    outline-offset: 2px;
}

/* 加载状态 */
.loading-state {
    position: relative;
}

.loading-state::after {
    content: attr(data-loading-text);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    white-space: nowrap;
    z-index: 1000;
}

/* 响应式可访问性 */
@media (max-width: 768px) {
    .touch-target {
        min-width: 48px !important;
        min-height: 48px !important;
        padding: 14px !important;
    }
    
    .semantic-heading.h1 {
        font-size: 2em;
    }
    
    .semantic-heading.h2 {
        font-size: 1.75em;
    }
    
    .semantic-heading.h3 {
        font-size: 1.4em;
    }
}

/* 打印样式 */
@media print {
    .interactive-element,
    .button,
    .chart-control-btn {
        background: white !important;
        color: black !important;
        border: 2px solid black !important;
    }
    
    .tooltip,
    .modal,
    .sound-control {
        display: none !important;
    }
    
    .chart-svg {
        max-width: 100% !important;
        height: auto !important;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --text-color: #ffffff;
        --surface-color: #1e1e1e;
        --primary-color: #90caf9;
        --secondary-color: #f48fb1;
    }
    
    .chart-container,
    .interactive-element {
        background: var(--surface-color) !important;
        color: var(--text-color) !important;
    }
    
    .chart-svg text {
        fill: var(--text-color) !important;
    }
    
    .tooltip {
        background: var(--surface-color) !important;
        color: var(--text-color) !important;
        border: 1px solid var(--primary-color) !important;
    }
}