/* ==================== 棋盘棋谱导航控件样式 ==================== */
.board-controls {
    background: linear-gradient(135deg, rgba(255,255,255, 0.98) 0%, rgba(248, 250, 252, 0.98) 100%) !important;
    color: #2d3748 !important;
    padding: 6px 16px !important;
    border-radius: 16px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 6px !important;
    width: auto !important;
    max-width: 100% !important;
    min-width: 280px !important;
    height: auto !important;
    max-height: 160px !important;
    z-index: 2 !important;
    margin-top: 10px !important;
    position: relative !important;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1), 0 2px 6px rgba(0, 0, 0, 0.05) !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    backdrop-filter: blur(15px) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    overflow: hidden;
}

.board-controls-row {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 10px !important;
    width: auto !important;
    justify-content: space-between !important;
    position: relative !important;
    flex: 0 0 auto !important;
    min-height: 44px !important;
}

/* 题目模式的按钮组特殊布局 */
.board-controls-row .problem-buttons,
.board-controls-row .trial-buttons {
    width: 100% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-around !important;
    gap: 12px !important;
    min-height: 42px !important;
}

/* 图标+文字模式时增加高度 */
.board-controls-row .problem-buttons:has(.control-btn:has(div)),
.board-controls-row .trial-buttons:has(.control-btn:has(div)) {
    min-height: 64px !important;
}

/* 试下按钮组默认隐藏 */
.board-controls-row .trial-buttons {
    display: none !important;
}

/* 题目模式下的按钮行需要特殊处理 */
.board-controls-row > .board-control-buttons {
    width: 100% !important;
    min-height: 42px !important;
}

/* 当按钮组包含图标+文字模式时，增加容器高度 */
.board-controls-row:has(.control-btn:has(div)) > .board-control-buttons {
    min-height: 64px !important;
}

/* 题目模式的按钮组特殊布局 */
.board-control-buttons.problem-buttons,
.board-control-buttons.trial-buttons {
    width: 100% !important;
    min-height: 42px !important;
}

.board-control-buttons.problem-buttons:has(.control-btn:has(div)),
.board-control-buttons.trial-buttons:has(.control-btn:has(div)) {
    min-height: 64px !important;
}

.board-control-buttons {
    display: flex !important;
    align-items: center !important;
    gap: 16px !important;
    flex-shrink: 0 !important;
    z-index: 2 !important;
}

/* 图标+文字模式时移除间距 - 检查是否有任何一个按钮包含div */
.board-control-buttons:has(.control-btn > div) {
    gap: 0 !important;
}

.board-controls::before {
    content: '' !important;
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 3px !important;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #f093fb 100%) !important;
    z-index: 1 !important;
}

.board-controls:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12), 0 3px 8px rgba(0, 0, 0, 0.08) !important;
    transform: translateY(-2px) !important;
    border-color: rgba(203, 213, 225, 1) !important;
}

/* ==================== 导航控件按钮样式 ==================== */
.board-controls .control-btn {
    width: 42px !important;
    height: 42px !important;
    min-width: 44px !important;
    min-height: 44px !important;
    border: none !important;
    border-radius: 50% !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    cursor: pointer !important;
    font-size: 18px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45), 0 2px 4px rgba(102, 126, 234, 0.3) !important;
    position: relative !important;
    overflow: hidden !important;
    z-index: 2 !important;
    font-weight: 500 !important;
    flex-shrink: 0 !important;
}

.board-controls .control-btn:focus {
    outline: 2px solid #667eea !important;
    outline-offset: 2px !important;
}

.board-controls .control-btn:focus:not(:focus-visible) {
    outline: none !important;
}

.board-controls .control-btn:focus-visible {
    outline: 2px solid #667eea !important;
    outline-offset: 2px !important;
}

.board-controls .control-btn::before {
    content: '' !important;
    position: absolute !important;
    top: 0 !important;
    left: -100% !important;
    width: 100% !important;
    height: 100% !important;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent) !important;
    transition: all 0.4s ease !important;
    z-index: 1 !important;
}

.board-controls .control-btn::after {
    content: '' !important;
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    width: 0 !important;
    height: 0 !important;
    border-radius: 50% !important;
    background: rgba(255,255,255,0.15) !important;
    transform: translate(-50%, -50%) !important;
    transition: all 0.3s ease !important;
    z-index: 1 !important;
}

.board-controls .control-btn:hover::before {
    left: 100% !important;
}

.board-controls .control-btn:hover::after {
    width: 120% !important;
    height: 120% !important;
}

.board-controls .control-btn:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #684292 100%) !important;
    transform: translateY(-2px) scale(1.02) !important;
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.55), 0 2px 6px rgba(102, 126, 234, 0.4) !important;
}

.board-controls .control-btn:active {
    transform: translateY(-1px) scale(0.98) !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45) !important;
}

.board-controls .control-btn:disabled {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e0 100%) !important;
    color: #718096 !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1) !important;
    opacity: 0.6 !important;
}

.board-controls .control-btn:disabled::before,
.board-controls .control-btn:disabled::after {
    display: none !important;
}

.board-controls .control-btn:disabled:focus {
    outline: 2px solid #cbd5e0 !important;
    outline-offset: 2px !important;
}

/* 按钮显示模式：图标+文字 */
/* 按钮容器改为垂直布局 */
.board-controls .control-btn > div {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
}

/* 按钮样式：带div时按钮本身变为透明，作为容器 */
.board-controls .control-btn:has(div) {
    width: auto !important;
    height: auto !important;
    min-width: 54px !important;
    min-height: 64px !important;
    background: transparent !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    color: #2d3748 !important;
    font-size: 18px !important;
    padding: 4px 8px !important;
}

.board-controls .control-btn:has(div)::before,
.board-controls .control-btn:has(div)::after {
    display: none !important;
}

.board-controls .control-btn:has(div):hover {
    background: rgba(102, 126, 234, 0.05) !important;
    transform: none !important;
    box-shadow: none !important;
}

.board-controls .control-btn:has(div):active {
    background: rgba(102, 126, 234, 0.1) !important;
    transform: none !important;
    box-shadow: none !important;
}

.board-controls .control-btn:has(div):focus {
    outline: 2px solid #667eea !important;
    outline-offset: 2px !important;
    background: rgba(102, 126, 234, 0.05) !important;
}

/* 内部的圆形图标容器 */
.board-controls .control-btn:has(div) > div > :first-child {
    width: 42px !important;
    height: 42px !important;
    min-width: 44px !important;
    min-height: 44px !important;
    border-radius: 50% !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45), 0 2px 4px rgba(102, 126, 234, 0.3) !important;
    position: relative !important;
    overflow: hidden !important;
}

.board-controls .control-btn:has(div) > div > :first-child::before {
    content: '' !important;
    position: absolute !important;
    top: 0 !important;
    left: -100% !important;
    width: 100% !important;
    height: 100% !important;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent) !important;
    transition: all 0.4s ease !important;
    z-index: 1 !important;
}

.board-controls .control-btn:has(div) > div > :first-child::after {
    content: '' !important;
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    width: 0 !important;
    height: 0 !important;
    border-radius: 50% !important;
    background: rgba(255,255,255,0.15) !important;
    transform: translate(-50%, -50%) !important;
    transition: all 0.3s ease !important;
    z-index: 1 !important;
}

.board-controls .control-btn:has(div):hover > div > :first-child::before {
    left: 100% !important;
}

.board-controls .control-btn:has(div):hover > div > :first-child::after {
    width: 120% !important;
    height: 120% !important;
}

.board-controls .control-btn:has(div):hover > div > :first-child {
    background: linear-gradient(135deg, #5a6fd8 0%, #684292 100%) !important;
    transform: translateY(-2px) scale(1.02) !important;
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.55), 0 2px 6px rgba(102, 126, 234, 0.4) !important;
}

.board-controls .control-btn:has(div):active > div > :first-child {
    transform: translateY(-1px) scale(0.98) !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45) !important;
}

/* 禁用状态 */
.board-controls .control-btn:has(div):disabled > div > :first-child {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e0 100%) !important;
    color: #718096 !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1) !important;
    opacity: 0.6 !important;
}

.board-controls .control-btn:has(div):disabled > div > :first-child::before,
.board-controls .control-btn:has(div):disabled > div > :first-child::after {
    display: none !important;
}

/* 文字样式 */
.board-controls .control-btn > div span {
    font-size: 13px !important;
    line-height: 1.3 !important;
    font-weight: 500 !important;
    white-space: nowrap !important;
    color: #2d3748 !important;
}

.board-controls .control-btn:has(div):disabled > div span {
    color: #718096 !important;
}

.board-controls .control-btn:has(div):disabled {
    cursor: not-allowed !important;
}

.board-controls .control-btn:has(div):disabled:focus {
    outline: 2px solid #cbd5e0 !important;
    outline-offset: 2px !important;
}

/* ==================== 滑块样式 ==================== */
.board-slider-container {
    flex: 1 !important;
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    min-width: 120px !important;
    z-index: 2 !important;
}

.board-slider {
    flex: 1 !important;
    height: 8px !important;
    background: #f7fafc !important;
    border-radius: 4px !important;
    outline: none !important;
    appearance: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    cursor: pointer !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08) !important;
    transition: all 0.3s ease !important;
    position: relative !important;
    z-index: 2 !important;
}

/* 滑块轨道样式 */
.board-slider::-webkit-slider-runnable-track {
    height: 8px !important;
    background: #f7fafc !important;
    border-radius: 4px !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08) !important;
    transition: all 0.3s ease !important;
    appearance: none !important;
    -webkit-appearance: none !important;
}

.board-slider::-moz-range-track {
    height: 8px !important;
    background: #f7fafc !important;
    border-radius: 4px !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08) !important;
    transition: all 0.3s ease !important;
    border: none !important;
    appearance: none !important;
    -moz-appearance: none !important;
}

.board-slider::-ms-track {
    height: 8px !important;
    background: transparent !important;
    border-color: transparent !important;
    border-width: 3px 0 !important;
    color: transparent !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08) !important;
    appearance: none !important;
}

/* 滑块进度样式 */
.board-slider::-ms-fill-lower {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 50%, #f093fb 100%) !important;
    border-radius: 4px !important;
    box-shadow: 0 0 12px rgba(102, 126, 234, 0.4) !important;
    appearance: none !important;
}

.board-slider::-ms-fill-upper {
    background: #f7fafc !important;
    border-radius: 4px !important;
    appearance: none !important;
}

/* 滑块按钮样式 */
.board-slider::-webkit-slider-thumb {
    appearance: none !important;
    -webkit-appearance: none !important;
    width: 18px !important;
    height: 18px !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border-radius: 50% !important;
    cursor: pointer !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45), 0 2px 6px rgba(102, 126, 234, 0.3) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    margin-top: -5px !important;
    position: relative !important;
    z-index: 3 !important;
}

.board-slider::-moz-range-thumb {
    appearance: none !important;
    -moz-appearance: none !important;
    width: 18px !important;
    height: 18px !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border-radius: 50% !important;
    cursor: pointer !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45), 0 2px 6px rgba(102, 126, 234, 0.3) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    border: none !important;
    position: relative !important;
    z-index: 3 !important;
}

.board-slider::-ms-thumb {
    appearance: none !important;
    width: 18px !important;
    height: 18px !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border-radius: 50% !important;
    cursor: pointer !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45), 0 2px 6px rgba(102, 126, 234, 0.3) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    border: none !important;
    position: relative !important;
    z-index: 3 !important;
}

/* 滑块悬停效果 */
.board-slider:hover {
    background: #f1f5f9 !important;
}

.board-slider:hover::-webkit-slider-runnable-track {
    background: #f1f5f9 !important;
}

.board-slider:hover::-moz-range-track {
    background: #f1f5f9 !important;
}

.board-slider:hover::-webkit-slider-thumb {
    transform: translateY(-2px) scale(1.1) !important;
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.55), 0 2px 6px rgba(102, 126, 234, 0.4) !important;
}

.board-slider:hover::-moz-range-thumb {
    transform: translateY(-2px) scale(1.1) !important;
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.55), 0 2px 6px rgba(102, 126, 234, 0.4) !important;
}

.board-slider:hover::-ms-thumb {
    transform: translateY(-2px) scale(1.1) !important;
    box-shadow: 0 6px 16px rgba(102, 126, 234, 0.55), 0 2px 6px rgba(102, 126, 234, 0.4) !important;
}

/* 滑块激活效果 */
.board-slider:active::-webkit-slider-thumb {
    transform: translateY(-1px) scale(0.96) !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45) !important;
}

.board-slider:active::-moz-range-thumb {
    transform: translateY(-1px) scale(0.96) !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45) !important;
}

.board-slider:active::-ms-thumb {
    transform: translateY(-1px) scale(0.96) !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.45) !important;
}

.board-move-counter {
    font-size: 12px !important;
    font-weight: 500 !important;
    color: #64748b !important;
    min-width: 40px !important;
    text-align: center !important;
    flex-shrink: 0 !important;
    z-index: 2 !important;
    user-select: none !important;
}

.board-comment {
    width: 100% !important;
    padding: 8px 12px !important;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%) !important;
    border-radius: 10px !important;
    font-size: 14px !important;
    color: #4a5568 !important;
    text-align: center !important;
    min-height: 40px !important;
    max-height: 4.5em !important;
    display: flex !important;
    align-items: flex-start !important;
    justify-content: flex-start !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06) !important;
    line-height: 1.5 !important;
    font-weight: 500 !important;
    z-index: 2 !important;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif !important;
    letter-spacing: 0.5px !important;
    margin-top: 0 !important;
    overflow-y: auto !important;
    word-wrap: break-word !important;
    word-break: break-all !important;
    height: auto !important;
    flex: 0 0 auto !important;
}

/* 隐藏的注解框样式 */
.board-comment.hidden-comment {
    display: none !important;
    height: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    min-height: 0 !important;
    width: 0 !important;
    overflow: hidden !important;
}

.board-comment:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%) !important;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08) !important;
    border-color: rgba(203, 213, 225, 1) !important;
    transform: translateY(-2px) !important;
}

.board-comment:not([style*="display: none"]) {
    display: flex !important;
}