/* CustomTkinter 风格基础色调 */
:root {
    --bg-color: #f5f5f5;
    --frame-bg-color: #f8f9fa;
    --border-color: #CCCCCC;
    --text-color: #000000;
    --button-bg-color: #3b8edb; /* CTkButton blue */
    --button-hover-color: #2e6ea5;
    --secondary-button-bg-color: #6c757d; /* Grey for clear button */
    --secondary-button-hover-color: #5a6268;
    --primary-button-bg-color: #28a745; /* Green for generate */
    --primary-button-hover-color: #218838;
    --text-color-white: #FFFFFF;
    --font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --border-radius: 8px;
    --padding-small: 5px;
    --padding-medium: 10px;
    --line-height-tight: 1.4;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    color: var(--text-color);
    box-sizing: border-box;
}

.app-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 1400px; /* Adjust as per original geometry */
    margin: 15px; /* padx, pady equivalent */
    gap: 10px;
}

.header {
    text-align: center;
    margin-bottom: 10px;
}

.header h1 {
    font-size: 24px;
    color: var(--text-color);
    margin-bottom: 5px;
}

.header .subtitle {
    font-size: 14px;
    color: #666;
}

.control-panel {
    display: flex;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
    gap: 10px;
    margin-bottom: 15px;
}

.control-group {
    flex: 1; /* Distribute space */
    min-width: 250px; /* Minimum width for each column */
    background-color: var(--frame-bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--padding-medium);
    display: flex;
    flex-direction: column;
    gap: 8px; /* Space between control items */
    box-sizing: border-box;
}

.group-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 5px;
    padding-bottom: 5px;
    border-bottom: 1px solid var(--border-color); /* Subtle separator */
}

.control-item {
    display: flex;
    align-items: center;
    gap: 5px;
    line-height: var(--line-height-tight);
}

.control-item label {
    font-size: 14px;
    white-space: nowrap; /* Prevent label wrapping */
}

.control-item .empty-label {
    visibility: hidden; /* For alignment of subsequent dropdowns */
}

/* Custom Select Dropdowns */
.custom-select {
    flex-grow: 1; /* Take remaining space */
    padding: 7px 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: #FFFFFF;
    font-size: 14px;
    color: var(--text-color);
    height: 30px; /* Match button height */
    -webkit-appearance: none; /* Remove default browser styling */
    -moz-appearance: none;
    appearance: none;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23000000%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-6.5%200-12.3%203.2-16.1%208.1-3.8%204.9-4.8%2011-2.5%2017.2l128%20192c3.7%205.6%209.7%209.1%2016.4%209.1s12.7-3.5%2016.4-9.1l128-192c2.2-6.2%201.2-12.3-2.5-17.2z%22%2F%3E%3C%2Fsvg%3E');
    background-repeat: no-repeat;
    background-position: right 8px top 50%;
    background-size: 12px auto;
    cursor: pointer;
}

.custom-select:disabled {
    background-color: #e9ecef;
    cursor: not-allowed;
}

.small-select {
    flex-grow: 0;
    width: 60px; /* Fixed width for decimal combo */
}

/* Custom Input for number fields */
.custom-input {
    flex-grow: 1;
    padding: 7px 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background-color: #FFFFFF;
    font-size: 14px;
    color: var(--text-color);
    height: 30px; /* Match select height */
    box-sizing: border-box; /* Ensure padding doesn't increase total size */
}

.custom-input.small-input {
    flex-grow: 0;
    width: 70px; /* Adjust width for number inputs */
    text-align: center; /* Center the numbers */
}

/* Custom Buttons */
.custom-button {
    /* 解决问题2: 使用Flexbox确保文字垂直居中 */
    display: flex;
    align-items: center;
    justify-content: center;

    padding: 0 15px; /* 垂直padding设为0，让height和flexbox管理垂直居中 */
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: bold;
    color: var(--text-color-white);
    background-color: var(--button-bg-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
    height: 35px; /* Consistent height for main buttons */
}

.custom-button:hover {
    background-color: var(--button-hover-color);
}

.custom-button:disabled {
    background-color: #a0a0a0;
    cursor: not-allowed;
}

.custom-button.primary {
    background-color: var(--primary-button-bg-color);
}
.custom-button.primary:hover {
    background-color: var(--primary-button-hover-color);
}

.custom-button.secondary {
    background-color: var(--secondary-button-bg-color);
}
.custom-button.secondary:hover {
    background-color: var(--secondary-button-hover-color);
}

.button-group {
    display: flex;
    gap: 10px;
}

.button-group .custom-button {
    flex: 1; /* Distribute equally within group */
    height: 30px; /* Slightly smaller for download buttons */
}

.download-section {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 8px;
    margin-top: 8px;
    border-top: 1px solid var(--border-color);
}

.flex-grow {
    flex-grow: 1;
}

/* Custom Checkbox */
.custom-checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none; /* Prevent text selection */
    font-size: 14px;
    line-height: var(--line-height-tight);
}

.custom-checkbox-container input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.custom-checkbox {
    height: 18px;
    width: 18px;
    background-color: #eee;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    margin-right: 8px;
    display: inline-block;
    position: relative;
}

.custom-checkbox-container input[type="checkbox"]:checked ~ .custom-checkbox {
    background-color: var(--button-bg-color);
    border-color: var(--button-bg-color);
}

.custom-checkbox:after {
    content: "";
    position: absolute;
    display: none;
}

.custom-checkbox-container input[type="checkbox"]:checked ~ .custom-checkbox:after {
    display: block;
}

.custom-checkbox-container .custom-checkbox:after {
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 3px 3px 0;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap; /* Allow wrapping of checkboxes */
    gap: 15px; /* Space between checkbox items */
}

.chart-container {
    position: relative;
    background-color: #FFFFFF;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: var(--padding-medium);
    height: 600px; /* Fixed height for chart area */
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    max-width: 100%;
    max-height: 100%;
}

.watermark-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(15deg);
    font-size: 40px;
    color: #AAAAAA;
    opacity: 0.2;
    pointer-events: none; /* Allow clicks through watermark */
    user-select: none;
    z-index: 0; /* Behind chart elements */
    white-space: nowrap;
}

.watermark-bottom {
    position: absolute;
    bottom: 10px;
    right: 15px;
    font-size: 12px;
    color: #AAAAAA;
    opacity: 0.7;
    text-align: right;
    pointer-events: none;
    user-select: none;
    z-index: 0;
    line-height: 1.5;
}

.mode-switch-area {
    text-align: center; /* 居中按钮 */
    margin-bottom: 15px; /* 与下方控制面板的间距 */
}
.mode-switch-area .custom-button {
    width: auto; /* 按钮宽度自适应内容 */
    padding: 0 20px; /* 增加左右内边距 */
    /* 使用 var(--secondary-button-bg-color) 保持与清空角色按钮一致的灰色风格 */
    /* 或者可以定义一个新的颜色，例如： background-color: #f0ad4e; */
}

.variance-legend {
    border-left: 3px dashed #ccc;
    padding-left: 10px;
    margin-left: 5px;
}

/* 响应式调整 */
@media (max-width: 1024px) {
    .control-panel {
        flex-direction: column; /* Stack columns vertically */
    }

    .control-group {
        min-width: unset; /* Remove min-width when stacked */
        width: 100%;
    }
}

@media (max-width: 768px) {
    .app-container {
        margin: 10px;
    }
    .header h1 {
        font-size: 20px;
    }
    .group-title {
        font-size: 15px;
    }
    .control-item label, .custom-select, .custom-button, .custom-checkbox-container, .custom-input {
        font-size: 13px;
    }
    .custom-button {
        height: 32px;
    }
    .button-group .custom-button {
        height: 28px;
    }
    .chart-container {
        height: 450px;
    }
    .watermark-center {
        font-size: 30px;
    }
    .mode-switch-area .custom-button {
        width: 90%; /* 在小屏幕上让按钮占据更多宽度 */
        max-width: 300px; /* 避免按钮过宽 */
    }
}

@media (max-width: 480px) {
    .chart-container {
        height: 350px;
    }
    .watermark-center {
        font-size: 20px;
    }
    .watermark-bottom {
        font-size: 10px;
    }
    .checkbox-group {
        flex-direction: column; /* Stack checkboxes on small screens */
        gap: 5px;
    }
}

.rank-tip {
    font-size: 12px;
    color: #666;
    margin-top: 5px;
    margin-bottom: 10px;
    text-align: center;
}