/* 数字计算器样式 */

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 计算模式按钮 */
.mode-btn {
    background: transparent;
    color: #6b7280;
}

.mode-btn.active {
    background: white;
    color: #6366f1;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mode-btn:hover:not(.active) {
    background: rgba(255, 255, 255, 0.5);
}

/* 输入区域 */
#input-area {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', 'Roboto Mono', monospace;
    line-height: 1.6;
}

/* 预览区域 */
#preview-area {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', 'Roboto Mono', monospace;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-all;
}

/* 高亮非数字行 */
.invalid-line {
    color: #ef4444;
    background-color: #fef2f2;
    padding: 2px 4px;
    border-radius: 3px;
}

/* 有效数字行 */
.valid-line {
    color: #16a34a;
}

/* 错误提示 */
.error-box {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    color: #dc2626;
    font-size: 0.875rem;
}

/* 成功提示 */
.success-box {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    color: #16a34a;
    font-size: 0.875rem;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a1a1a1;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#result {
    animation: fadeIn 0.3s ease-out;
}

/* 历史记录样式 */
#history-list .group {
    position: relative;
}

#history-list .group:hover .copy-history-btn {
    opacity: 1;
}

.copy-history-btn {
    transition: all 0.2s ease;
}

.copy-history-btn:hover {
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: 6px;
}

/* 分页按钮禁用状态 */
button:disabled {
    cursor: not-allowed;
}

/* 响应式调整 */
@media (max-width: 640px) {
    .mode-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
    }
    
    #result {
        font-size: 2rem;
    }
    
    #history-list .flex-1 {
        min-width: 0;
    }
}