/* 补单计算器样式 */
:root {
    --primary-color: #007bff;  /* 主要颜色 */
    --primary-hover-color: #0056b3;  /* 鼠标悬停时的主要颜色 */
    --text-dark: #212529;  /* 深色文本颜色 */
    --text-medium: #495057;  /* 中等文本颜色 */
    --text-light: #6c757d;  /* 浅色文本颜色 */
    --border-color: #dee2e6;  /* 边框颜色 */
    --input-border-color: #ced4da;  /* 输入框边框颜色 */
    --background-light: #f1f3f5;  /* 浅色背景 */
    --background-section: #f8f9fa;  /* 区块背景 */
    --background-white: #ffffff;  /* 白色背景 */
    --success-bg: #d4edda;  /* 成功背景色 */
    --success-border: #c3e6cb;  /* 成功边框色 */
    --success-text: #155724;  /* 成功文本色 */
    --error-bg: #f8d7da;  /* 错误背景色 */
    --error-border: #f5c6cb;  /* 错误边框色 */
    --error-text: #721c24;  /* 错误文本色 */
    --button-secondary-bg: #e9ecef;  /* 次要按钮背景 */
    --button-secondary-hover-bg: #dee2e6;  /* 次要按钮悬停背景 */
    --button-secondary-text: #495057;  /* 次要按钮文本色 */
}

html {
  box-sizing: border-box; /* 全局 box-sizing */
}
*, *::before, *::after {
  box-sizing: inherit; /* 继承全局 box-sizing */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--background-light);
    color: var(--text-dark);
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

/* --- 布局与容器 --- */
.wrapper {
    padding: 20px;
    background-color: var(--background-light);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.container { /* main 元素会使用这个类 */
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    background: var(--background-white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border: 1px solid var(--border-color);
}

/* 防止卡片背景大小变化，但保持与规则中心卡片一致 */
.platform-specific-container {
    width: 100%;
    box-sizing: border-box;
    padding: 0;
    max-width: 100%;
}

.metric-section {
    width: 100%;
    box-sizing: border-box;
    margin: 0;
    max-width: 100%;
    padding: 20px;
}

.result {
    padding: 12px 15px;
    margin-top: 20px;
    border-radius: 4px;
    border: 1px solid transparent;
    display: block;
    font-weight: 500;
    width: 100%;
    box-sizing: border-box;
    transition: all 0.3s ease-in-out;
}

.result.hidden {
    display: none;
}

.result.success {
    background-color: var(--success-bg);
    border-color: var(--success-border);
    color: var(--success-text);
}

.result.error {
    background-color: var(--error-bg);
    border-color: var(--error-border);
    color: var(--error-text);
}

.result strong {
    font-weight: 700;
}

.result.error strong {
    color: inherit;
}

/* --- 排版 --- */
h1 {
    color: var(--text-dark);
    text-align: center;
    margin-top: 0;
    margin-bottom: 15px;
    font-weight: 600;
    font-size: 1.8em;
}

.container > p { /* 应用于 main 下的直接子 p 元素 */
    text-align: center;
    color: var(--text-light);
    margin-bottom: 25px;
    font-size: 1em;
}

h2 {
    color: var(--primary-hover-color);
    border-bottom: 2px solid var(--primary-hover-color);
    padding-bottom: 8px;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.3em;
    font-weight: 500;
}

small {
    display: block;
    color: var(--text-light);
    margin-bottom: 15px;
    font-size: 0.9em;
    font-style: italic;
}

/* --- 区块 --- */
.metric-section, .selector-group { /* section 元素会使用这些类 */
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 6px;
    background-color: var(--background-white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
    box-sizing: border-box;
    max-width: 100%;
    width: 100%;
}

.selector-group {
     background-color: var(--background-section);
}

.platform-specific-container {
    margin-top: 20px;
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
}

.metric-sections-wrapper {
    /* No specific styles needed for now, acts as a container */
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
}

/* 防止选择指标后容器放大 */
.metric-section {
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    padding: 20px;
}

.selector-group select {
    box-sizing: border-box;
    max-width: 100%;
}

/* 确保平台容器尺寸一致 */
#platformMetricContainer {
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
    padding: 0;
}

/* 确保隐藏的元素不会影响容器大小 */
.hidden, 
.metric-section.hidden, 
.platform-specific-container.hidden {
    display: none !important;
}

/* 表单行和表单组 */
.form-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 20px;
    width: 100%;
}

.form-group {
    flex: 0 0 calc(50% - 10px);
    min-width: 150px;
    position: relative;
}

/* 确保两列布局 */
.form-row .form-group {
    width: calc(50% - 10px);
    flex: 0 0 calc(50% - 10px);
    margin-right: 0;
    margin-left: 0;
}

/* 当只有一个表单组时占据整行 */
.form-row > .form-group:only-child {
    flex-basis: 100%;
    width: 100%;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-medium);
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 输入框样式 */
input[type="number"], select {
    display: block;
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-dark);
    background-color: var(--background-white);
    background-clip: padding-box;
    border: 1px solid var(--input-border-color);
    border-radius: 4px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    height: 40px; /* 统一高度为40px */
    box-sizing: border-box;
}

/* 下拉选择框特定样式 */
select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23495057' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.7rem center;
    background-size: 8px 10px;
    padding-right: 25px;
}

/* 输入框焦点样式 */
input[type="number"]:focus, select:focus {
    color: var(--text-dark);
    background-color: var(--background-white);
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 输入框组 */
.input-group {
    display: flex;
    flex-wrap: nowrap;
    position: relative;
}

.input-group input[type="number"] {
    flex: 1 1 auto;
    width: 1%;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

/* 输入框添加单位 */
.input-group-addon {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-medium);
    text-align: center;
    white-space: nowrap;
    background-color: var(--button-secondary-bg);
    border: 1px solid var(--input-border-color);
    border-left: 0;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
    box-sizing: border-box;
    height: 40px; /* 修改为与输入框一致的高度 */
}

/* 计算按钮样式 */
.calc-button {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 8px 16px;
    font-size: 0.95rem;
    line-height: 1.5;
    border-radius: 4px;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    color: #fff;
    background-color: var(--platform-color, var(--primary-color));
    border-color: var(--platform-color, var(--primary-color));
    cursor: pointer;
    width: 100%;
    height: 38px; /* 确保与输入框高度一致 */
}

.calc-button:hover {
    opacity: 0.9;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.calc-button:active {
    opacity: 0.8;
    box-shadow: inset 0 3px 5px rgba(0,0,0,0.1);
}

.selector-group label { /* Applies to platform selection and metric selection labels */
    display: block;
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--text-dark);
    font-size: 1rem;
}

/* 平台按钮容器 */
.platform-buttons-container {
    width: 100%;
}

.platform-buttons-container > label { /* The "请选择您要计算的平台:" label */
    font-weight: 500;
    color: var(--text-medium);
    margin-bottom: 10px;
    display: block;
    font-size: 1rem;
    text-align: left;
}

.platform-buttons-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

/* 平台按钮样式 */
.platform-button {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 12px;
    background-color: var(--background-white);
    color: var(--text-dark);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    flex: 1 1 calc(16.666% - 10px);
    min-width: 80px;
    text-align: center;
    margin-bottom: 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.platform-button:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--platform-color, var(--primary-color));
    transition: height 0.2s ease;
}

.platform-button:hover {
    border-color: var(--platform-color, var(--primary-color));
    box-shadow: 0 2px 5px rgba(0,0,0,0.12);
}

.platform-button.active {
    background-color: var(--platform-color, var(--primary-color));
    color: white;
    border-color: var(--platform-color, var(--primary-color));
    box-shadow: 0 2px 5px rgba(0,0,0,0.15);
}

.platform-button.active:before {
    height: 0;
}

/* 时间输入组 */
.time-input-group {
    display: flex;
    gap: 10px;
    flex-wrap: nowrap;
}

.time-input-group .form-group {
    flex: 1 1 80px;
    min-width: 80px;
}

.time-input-group label { /* Label for hour/minute/second */
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.time-input-group input[type="number"] {
    text-align: center;
}

.time-unit {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 43px;
    padding: 0 5px;
    margin-bottom: 15px;
    margin-top: 25px;
    font-size: 1rem;
    color: var(--text-medium);
    font-weight: 500;
}

/* 页脚样式 */
.footer-section { /* footer 元素会使用这个类 */
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
}

.footer-section h5 {
    font-size: 1.1em;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-medium);
}

.footer-section p {
    margin-bottom: 5px;
    font-size: 0.9em;
}

.footer-section a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-section a:hover {
    text-decoration: underline;
    color: var(--primary-hover-color);
}

/* 其他样式 */
.calculation-button-card {
    display: none; /* 不再使用此类 */
}

/* 移动端自适应布局 */
@media (max-width: 768px) {
    .form-row {
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 15px;
    }
    
    .form-group {
        flex: 0 0 calc(50% - 8px);
        min-width: 0;
        width: calc(50% - 8px);
    }
    
    /* 确保每行始终显示两个输入项 */
    .form-row .form-group {
        width: calc(50% - 8px);
        flex: 0 0 calc(50% - 8px);
        margin: 0;
    }

    /* 计算按钮样式调整 */
    .calc-button {
        height: 38px;
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    /* 确保输入框和按钮对齐 */
    .form-group input[type="number"],
    .form-group .input-group,
    .form-group .calc-button {
        height: 38px;
    }

    /* 调整输入组适应移动端 */
    .input-group {
        height: 38px;
    }

    .input-group input[type="number"] {
        height: 100%;
    }

    .input-group-addon {
        height: 38px; /* 修改为与移动端输入框一致的高度 */
        display: flex;
        align-items: center;
    }
}

@media (max-width: 576px) {
    .form-row {
        margin-bottom: 15px;
    }
    
    .form-group label {
        font-size: 0.9rem;
        margin-bottom: 4px;
    }
    
    input[type="number"], 
    select,
    .calc-button {
        font-size: 0.9rem;
        padding: 6px 10px;
    }
    
    .input-group-addon {
        padding: 6px 10px;
        font-size: 0.9rem;
        height: 38px; /* 确保在小屏幕上高度一致 */
    }
}

/* 确保在超小屏幕上保持两列布局 */
@media (max-width: 375px) {
    .form-group {
        flex: 0 0 calc(50% - 5px);
        width: calc(50% - 5px);
    }
    
    .form-row {
        gap: 10px;
    }
    
    input[type="number"], 
    select,
    .calc-button {
        font-size: 0.85rem;
        padding: 6px 8px;
    }
    
    .input-group-addon {
        padding: 6px 8px;
        font-size: 0.85rem;
        height: 38px; /* 确保在超小屏幕上高度一致 */
    }
}

/* 添加返回链接样式 */
.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s ease-in-out;
}

.back-link:hover {
    color: var(--primary-hover-color);
    text-decoration: underline;
}

header {
    margin-bottom: 25px;
}

/* 基本按钮样式 */
button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
    margin: 0;
}

/* 计算按钮行样式 */
.calc-button-row {
    width: 100%;
    margin-top: 5px;
}

.calc-button-row .form-group {
    flex-basis: 100% !important;
    width: 100%;
}

@media (max-width: 600px) {
    .calc-button-row {
        margin-top: 10px;
    }
    
    .calc-button-row .form-group {
        flex-basis: 100% !important;
        width: 100%;
    }
}

/* 确保选择指标框与输入框高度一致 */
.selector-group select {
    height: 40px; /* 确保与输入框高度一致 */
    padding: 0.6rem 0.75rem;
    font-size: 0.9rem;
}