/* 单位转换工具样式文件 */

.unit-converter-container {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

/* 单位类型选择 */
.unit-type-selection {
    margin-bottom: 2rem;
}

.unit-type-selection h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.unit-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.75rem;
}

.unit-type-btn {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

.unit-type-btn:hover {
    border-color: var(--primary-color);
    background: var(--hover-bg);
    transform: translateY(-2px);
}

.unit-type-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
}

/* 转换计算区域 */
.conversion-calculator {
    display: flex;
    align-items: stretch;
    gap: 1.5rem;
    margin-bottom: 2rem;
    background: var(--secondary-bg);
    border-radius: 12px;
    padding: 1.5rem;
}

.input-section,
.output-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.section-header label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
}

.unit-select {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.input-wrapper,
.output-wrapper {
    position: relative;
    flex: 1;
    min-height: 80px;
    display: flex;
    align-items: center;
}

.input-value,
.output-value {
    width: 100%;
    padding: 1rem;
    padding-right: 70px;
    font-size: 1.5rem;
    font-weight: 600;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: border-color 0.3s ease;
}

.input-value:focus {
    outline: none;
    border-color: var(--primary-color);
}

.output-value {
    background: var(--card-bg);
    cursor: default;
}

.unit-label {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.swap-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    background: var(--input-bg);
    color: var(--text-primary);
    cursor: pointer;
    align-self: center;
    transition: all 0.3s ease;
}

.swap-button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: rotate(180deg);
}

/* 转换按钮 */
.conversion-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.conversion-actions .btn.large {
    flex: 1;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
}

/* 快速转换表 */
.conversion-table {
    margin-bottom: 2rem;
}

.conversion-table h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.table-container {
    background: var(--secondary-bg);
    border-radius: 8px;
    overflow: hidden;
}

.quick-conversion-table {
    width: 100%;
    border-collapse: collapse;
}

.quick-conversion-table th,
.quick-conversion-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.quick-conversion-table th {
    background: var(--card-bg);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.quick-conversion-table td {
    color: var(--text-secondary);
}

.quick-conversion-table tr:last-child td {
    border-bottom: none;
}

.quick-conversion-table tr:hover {
    background: rgba(0, 0, 0, 0.02);
}

/* 转换历史 */
.conversion-history {
    margin-bottom: 2rem;
    background: var(--secondary-bg);
    border-radius: 8px;
    padding: 1.5rem;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.history-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.clear-history-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.clear-history-btn:hover {
    background: var(--error-color);
    color: white;
    border-color: var(--error-color);
}

.history-list {
    max-height: 300px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s ease;
}

.history-item:hover {
    background: var(--card-bg);
}

.history-item:last-child {
    border-bottom: none;
}

.history-item .conversion-info {
    color: var(--text-primary);
    font-weight: 500;
}

.history-item .conversion-time {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.empty-message {
    color: var(--text-secondary);
    text-align: center;
    padding: 2rem;
    margin: 0;
    font-style: italic;
}

/* 单位信息 */
.unit-info {
    background: var(--secondary-bg);
    border-radius: 8px;
    padding: 1.5rem;
}

.unit-info h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.info-content {
    color: var(--text-secondary);
    line-height: 1.6;
}

.info-content h4 {
    color: var(--text-primary);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.info-content ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.info-content li {
    margin-bottom: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .unit-converter-container {
        padding: 1.5rem;
    }
    
    .conversion-calculator {
        flex-direction: column;
        gap: 1rem;
    }
    
    .swap-button {
        transform: rotate(90deg);
        margin: 0.5rem 0;
    }
    
    .swap-button:hover {
        transform: rotate(270deg);
    }
    
    .conversion-actions {
        flex-direction: column;
    }
    
    .unit-type-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 0.5rem;
    }
    
    .unit-type-btn {
        padding: 0.5rem;
        font-size: 0.85rem;
    }
    
    .input-value,
    .output-value {
        font-size: 1.2rem;
        padding-right: 60px;
    }
    
    .unit-label {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .unit-type-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .history-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .conversion-time {
        font-size: 0.8rem;
    }
}

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

.history-item {
    animation: fadeIn 0.3s ease;
}

/* 加载状态 */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 1rem;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translateY(-50%) rotate(0deg); }
    100% { transform: translateY(-50%) rotate(360deg); }
}

/* 滚动条样式 */
.history-list::-webkit-scrollbar,
.info-content::-webkit-scrollbar {
    width: 6px;
}

.history-list::-webkit-scrollbar-track,
.info-content::-webkit-scrollbar-track {
    background: var(--border-color);
    border-radius: 3px;
}

.history-list::-webkit-scrollbar-thumb,
.info-content::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 3px;
}

.history-list::-webkit-scrollbar-thumb:hover,
.info-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}