:root {
    --primary-color: #4a6cf7;
    --secondary-color: #f77346;
    --text-dark: #333;
    --text-light: #777;
    --bg-light: #f9fafc;
    --border-color: #e8eaf0;
}

/* 整体布局样式 */
.app-wrapper {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    margin: 30px auto;
    max-width: 1200px;
}

.app-header {
    padding: 30px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.app-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.app-subtitle {
    font-size: 16px;
    color: var(--text-light);
}

/* 转换器内容样式 */
.converter-content {
    padding: 20px;
}

/* 选项卡样式 */
.converter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

.tab-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 20px;
    color: var(--text-light);
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab-btn i {
    font-size: 16px;
}

.tab-btn:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 转换面板样式 */
.converter-panels {
    position: relative;
}

.converter-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.converter-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 转换卡片样式 */
.converter-card {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-light);
}

.card-header i {
    font-size: 24px;
    color: var(--primary-color);
    margin-right: 15px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.section-subtitle {
    font-size: 14px;
    color: var(--text-light);
    display: block;
    margin-top: 5px;
}

.card-body {
    padding: 25px;
}

/* 输入组样式 */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.converter-input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.3s ease;
}

.converter-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.1);
}

.converter-select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 16px;
}

.converter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.1);
}

/* 结果框样式 */
.result-box {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    font-size: 16px;
    min-height: 50px;
    word-break: break-all;
}

/* 按钮样式 */
.btn {
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #3a5ad6;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 108, 247, 0.2);
}

/* 转换器网格样式 */
.converter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

/* 计算器相关样式 */
.calculator-display {
    width: 100%;
    padding: 15px;
    font-size: 18px;
    text-align: right;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 15px;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.calc-btn {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calc-btn:hover {
    background-color: var(--bg-light);
}

.calc-btn.number {
    background-color: #f5f7fa;
}

.calc-btn.operator {
    background-color: #eef1f6;
    color: var(--primary-color);
    font-weight: 600;
}

.calc-btn.equal {
    background-color: var(--primary-color);
    color: white;
    grid-column: span 2;
}

/* 语音控制样式 */
.voice-control {
    background-color: var(--bg-light);
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
}

.voice-control-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.voice-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 46px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--primary-color);
}

input:checked + .toggle-slider:before {
    transform: translateX(22px);
}

.voice-volume-slider {
    width: 100%;
    height: 5px;
    -webkit-appearance: none;
    background: linear-gradient(to right, var(--primary-color) 0%, var(--primary-color) 80%, #ddd 80%, #ddd 100%);
    border-radius: 5px;
    outline: none;
}

.voice-volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--primary-color);
    cursor: pointer;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .app-wrapper {
        margin: 15px;
    }
    
    .converter-tabs {
        overflow-x: auto;
        padding-bottom: 15px;
        display: flex;
        flex-wrap: nowrap;
    }
    
    .tab-btn {
        flex: 0 0 auto;
        white-space: nowrap;
    }
    
    .converter-grid {
        grid-template-columns: 1fr;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .calculator-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}