* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 优化配色方案，更接近图片样式 */
    --primary-color: #6979f8; /* 主色调：蓝紫色 */
    --secondary-color: #a5affb; /* 次要色调：浅蓝紫色 */
    --accent-color: #8c95f7; /* 强调色：中蓝紫色 */
    
    --text-color: #333344; /* 主文字颜色 */
    --light-text: #777789; /* 次要文字颜色 */
    --bg-color: #f7f7fc; /* 背景色 */
    --light-bg: #f1f3ff; /* 浅色背景 */
    --shadow-light: rgba(255, 255, 255, 0.7);
    --shadow-dark: rgba(209, 209, 232, 0.5);
    
    /* 按钮颜色 */
    --button-bg: #ffffff;
    --button-operator: var(--primary-color);
    --button-function: var(--light-bg);
    --button-number: #ffffff;
    --button-equals: var(--accent-color);
    --display-bg: #ffffff;
    
    /* 圆角和间距 */
    --border-radius: 12px;
    --button-radius: 8px;
    --button-gap: 8px;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

#matrixCanvas {
    display: none; /* 移除矩阵背景效果 */
}

.calculator-container {
    display: flex;
    width: 100%;
    max-width: 1200px;
    height: 100vh;
    margin: 0 auto;
    padding: 15px;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 20px;
    overflow: auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

/* 三个主面板的共同样式 */
.constants-panel, .calculator, .history-panel {
    background: var(--bg-color);
    border-radius: var(--border-radius);
    box-shadow: 0px 10px 20px var(--shadow-dark);
    padding: 15px;
    margin: 10px 0;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 40px);
    max-height: calc(100vh - 40px);
    overflow: hidden;
}

/* 调整三个面板的相对宽度 */
.constants-panel {
    flex: 0 0 280px; /* 固定宽度 */
    max-width: 280px;
    overflow: hidden; /* 隐藏整个面板的溢出内容 */
}

.calculator {
    flex: 1;
    max-width: 700px;
    min-width: 350px;
    overflow: hidden; /* 隐藏整个计算器面板的溢出内容 */
}

.history-panel {
    flex: 0 0 280px; /* 固定宽度 */
    max-width: 280px;
    overflow: hidden; /* 隐藏整个历史面板的溢出内容 */
}

.display {
    background: var(--display-bg);
    border-radius: var(--button-radius);
    padding: 15px;
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    font-family: 'Roboto Mono', 'Consolas', monospace;
    box-shadow: inset 0px 2px 4px rgba(0, 0, 0, 0.05);
    cursor: text;
    font-size: 1.7em;
    min-height: 95px; /* 设置最小高度 */
    height: auto; /* 允许高度自动调整 */
    width: 100%;
    box-sizing: border-box;
    overflow: visible; /* 允许内容溢出，防止截断 */
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(209, 209, 232, 0.5);
}

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

.clear-history-btn, .clear-constants-btn {
    background: #f1f1f5;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.9em;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.clear-history-btn:hover, .clear-constants-btn:hover {
    background-color: #e5e5ea;
}

/* 历史记录滚动区域 */
.history {
    flex: 1;
    max-height: calc(100% - 50px); /* 留出标题的空间 */
    overflow-y: auto; /* 只有在内容超过高度时显示纵向滚动条 */
    overflow-x: hidden; /* 隐藏横向滚动条 */
    padding: 5px;
    user-select: text;
    scrollbar-width: thin; /* Firefox样式 */
    scrollbar-color: var(--secondary-color) transparent; /* Firefox样式 */
}

.history-item {
    position: relative;
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 6px;
    border-bottom: 1px dashed rgba(110, 110, 143, 0.2);
    transition: all 0.2s ease;
    cursor: pointer;
}

.history-item:hover {
    background-color: rgba(105, 121, 248, 0.1);
}

.history-expression {
    font-size: 0.95em;
    color: var(--text-color);
    padding-right: 50px; /* 为时间戳留出空间 */
}

.history-timestamp {
    position: absolute;
    top: 5px;
    right: 8px;
    font-size: 0.7em;
    color: var(--light-text);
    opacity: 0.6;
}

.result-container {
    display: flex;
    position: relative;
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 5px;
}

.current-input {
    color: var(--text-color);
    font-size: 1.7em;
    text-align: right;
    font-weight: 600;
    width: 100%;
    padding: 8px 35px 8px 8px; /* 右侧留出复制按钮的空间 */
    border-radius: 8px;
    border: none;
    outline: none;
    background-color: transparent;
    font-family: 'Roboto Mono', 'Consolas', monospace;
    white-space: pre-wrap; /* 保留换行并自动换行 */
    word-break: break-all;
    min-height: 40px; /* 只设置最小高度 */
    max-height: 300px; /* 设置最大高度限制 */
    height: auto; /* 允许高度自动调整 */
    resize: none;
    line-height: 1.3;
    margin: 0;
    box-sizing: border-box;
    display: block; /* 确保是块级元素 */
    overflow: hidden; /* 隐藏滚动条 */
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
    vertical-align: top; /* 确保垂直对齐 */
}

/* 专门为输入框隐藏WebKit滚动条 */
.current-input::-webkit-scrollbar {
    width: 0;
    height: 0;
    display: none;
}

.current-input:focus {
    background-color: rgba(0, 0, 0, 0.04);
    box-shadow: inset 0 0 0 2px rgba(105, 121, 248, 0.2);
}

.buttons {
    flex: 0 0 300px; /* 稍微调整宽度 */
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 10px;
    margin-right: 5px;
}

.button-row {
    display: contents; /* 让子元素直接参与父级网格布局 */
}

.btn {
    font-size: 1.15em;
    border: none;
    border-radius: var(--button-radius);
    background: var(--button-bg);
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
    user-select: none;
    padding: 0; /* 移除内边距，使用高度和宽度控制 */
    height: 60px; /* 固定高度 */
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 数字按钮样式调整 */
.buttons .btn {
    font-size: 1.3em;
    font-weight: 600;
}

/* 科学计算区域布局 */
.scientific-buttons {
    flex: 1;
    max-width: 430px; /* 限制最大宽度 */
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    align-content: start;
}

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

/* 科学计算按钮样式 */
.scientific-buttons .btn {
    height: 48px; /* 略微增加高度 */
    font-size: 0.95em;
    padding: 0 5px; /* 为文字添加一些水平内边距 */
}

/* 按钮悬停效果 */
.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.15);
}

.btn:active, .btn.active {
    transform: scale(0.98);
    box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .calculator-grid {
        flex-direction: column;
    }
    
    .settings-content {
        grid-template-columns: 1fr;
    }
    
    .buttons {
        flex: none;
        width: 100%;
        max-width: 100%;
        margin: 0 auto 15px auto;
    }
    
    .scientific-buttons {
        width: 100%;
    }
    
    .btn {
        height: 50px;
    }
    
    .scientific-buttons .btn {
        height: 40px;
    }
    
    .calculator-container {
        padding: 8px;
    }
    
    .calculator, .history-panel, .constants-panel {
        width: 100%;
        max-width: 100%;
        padding: 10px;
    }
    
    /* 确保移动设备上历史记录和常量列表可以滚动 */
    .history, .constants-list {
        max-height: 30vh; /* 在手机上设置更合理的高度 */
    }
    
    /* 调整输入显示 */
    .display, .current-input {
        font-size: 1.4em;
    }
}

/* 错误消息样式 */
.error-display {
    color: #e74c3c;
    font-size: 0.9em;
    min-height: 20px;
    padding: 4px 0;
    text-align: right;
    transition: all 0.3s ease;
    font-weight: 500;
    background-color: rgba(231, 76, 60, 0.05);
    border-radius: 4px;
    margin-top: 5px;
    overflow: hidden;
}

.current-input.error {
    color: #e74c3c;
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
    border: 1px solid rgba(231, 76, 60, 0.3);
    background-color: rgba(231, 76, 60, 0.05);
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-2px, 0, 0); }
    40%, 60% { transform: translate3d(2px, 0, 0); }
}

/* 添加显示区域选择时的样式 */
.current-input::selection,
.history-item::selection {
    background-color: rgba(105, 121, 248, 0.3);
}

/* 添加结果容器和复制按钮的样式 */
.copy-btn {
    background: transparent;
    border: none;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    cursor: pointer;
    border-radius: 4px;
    opacity: 0.6;
    transition: all 0.2s ease;
    position: absolute;
    top: 5px;
    right: 5px;
    z-index: 5;
}

.copy-btn:hover {
    background-color: rgba(105, 121, 248, 0.1);
    color: var(--primary-color);
    opacity: 1;
}

.copy-btn:active {
    transform: scale(0.95);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

/* 复制成功的动画效果 */
@keyframes copied {
    0%, 100% {
        color: var(--primary-color);
    }
    50% {
        color: var(--accent-color);
    }
}

.copy-btn.copied {
    animation: copied 0.5s ease;
}

.copy-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (max-width: 1200px) {
    .calculator-container {
        padding: 10px;
        flex-direction: column;
        height: auto;
        max-height: none;
        align-items: center;
        overflow-y: auto; /* 允许整个容器滚动 */
    }
    
    .constants-panel, .calculator, .history-panel {
        width: 100%;
        max-width: 650px;
        flex: none;
        margin: 10px 0;
        height: auto;
        max-height: 80vh; /* 限制每个面板的最大高度 */
    }
    
    .constants-panel, .history-panel {
        height: auto;
        min-height: 300px;
    }
    
    .constants-panel {
        order: 1;
    }
    
    .calculator {
        order: 2;
        min-height: 500px;
    }
    
    .history-panel {
        order: 3;
    }
    
    /* 确保滚动区域在小屏幕上正常工作 */
    .history, .constants-list {
        max-height: calc(100vh * 0.6); /* 相对视口高度的固定比例 */
    }
}

@media (max-width: 576px) {
    .calculator-container {
        padding: 10px;
    }
    
    .calculator, .history-panel {
        margin: 10px;
        padding: 10px;
        box-shadow: 0px 5px 15px var(--shadow-dark);
    }
    
    .button-row, .scientific-buttons .row {
        gap: 2px;
    }
    
    .btn {
        min-height: 38px;
        font-size: 0.85em;
        padding: 5px 0;
    }
    .display, .current-input {
        font-size: 1.5em;
    }
    
    /* 在小屏幕上改进科学计算器按钮布局 */
    .calculator-grid {
        flex-direction: column;
    }
    
    .scientific-buttons {
        order: 2;
        margin-top: 10px;
    }
    
    .buttons {
        order: 1;
    }
    
    .settings-content {
        display: grid;
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

/* 左右排列布局调整，删除冲突样式，重新设计 */
.calculator-grid {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    align-items: flex-start;
}

/* 优化设置区域样式 */
.settings-section {
    background: var(--light-bg);
    border-radius: var(--button-radius);
    padding: 15px;
    margin-bottom: 10px;
}

.settings-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px;
}

/* 使设置区域的输入框样式与计算器一致 */
.setting-item label {
    font-size: 0.9em;
    color: var(--text-color);
    flex: 1;
}

.setting-item input[type="number"] {
    width: 70px;
    padding: 6px 8px;
    border-radius: 6px;
    border: 1px solid var(--secondary-color);
    background: white;
    font-family: 'Roboto Mono', 'Consolas', monospace;
    text-align: center;
    color: var(--text-color);
    box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.1);
}

.setting-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

/* 优化清除数据按钮 */
.danger-btn {
    flex: 1;
    background-color: #ff4d4f;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 10px;
    font-size: 0.9em;
}

.danger-btn:hover {
    background-color: #ff7875;
}

/* 设置标题样式 */
.settings-title {
    font-size: 1.1em;
    margin: 0 0 15px 0;
    color: var(--text-color);
    font-weight: 600;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(105, 121, 248, 0.2);
}

/* 设置按钮组样式 */
.setting-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
    grid-column: 1 / -1;
}

.secondary-btn {
    background-color: #f0f0f0;
    color: var(--text-color);
    border: none;
    border-radius: 6px;
    padding: 8px 15px;
    font-size: 0.9em;
    cursor: pointer;
    transition: all 0.2s ease;
    flex: 1;
}

.secondary-btn:hover {
    background-color: #e5e5e5;
}

.secondary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    color: var(--light-text);
}

/* 角度模式按钮样式 */
.angle-mode-row {
    display: flex;
    justify-content: space-between;
}

.angle-mode-btn {
    padding: 6px 0;
    font-size: 0.8em;
}

.angle-mode-btn.active {
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
}

/* 函数快捷键盘样式 */
.function-keypad {
    margin-bottom: 10px;
    padding: 6px;
    background-color: var(--light-bg);
    border-radius: var(--button-radius);
    box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.1);
}

.function-keypad-row {
    display: flex;
    justify-content: space-between;
    gap: 5px;
    flex-wrap: wrap;
}

.function-key {
    flex: 1 0 auto;
    min-width: 60px;
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
    font-size: 0.9em;
    padding: 6px 4px;
    border-radius: 4px;
}

.function-key:hover {
    background-color: var(--accent-color);
}

/* 常量定义面板样式 */
.constants-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(209, 209, 232, 0.5);
}

.constants-header h3 {
    color: var(--text-color);
    font-size: 1.2em;
    margin: 0;
    white-space: nowrap;
}

.constants-input-container {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    gap: 5px;
    flex-wrap: wrap;
}

.constant-input {
    flex: 1;
    padding: 8px 10px;
    border-radius: 4px;
    border: 1px solid var(--shadow-dark);
    font-family: 'Roboto Mono', monospace;
    background-color: white;
    min-width: 80px;
    max-width: 120px;
}

.equals-sign {
    font-size: 1.2em;
    color: var(--text-color);
    margin: 0 2px;
    flex: 0 0 auto;
}

.add-constant-btn {
    background: var(--primary-color);
    border: none;
    color: white;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.9em;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(105, 121, 248, 0.3);
}

.add-constant-btn:hover {
    background: var(--accent-color);
    box-shadow: 0 3px 6px rgba(105, 121, 248, 0.4);
}

/* 常量列表滚动区域 */
.constants-list {
    flex: 1;
    max-height: calc(100% - 110px); /* 留出标题和输入区域的空间 */
    overflow-y: auto; /* 只有在内容超过高度时显示纵向滚动条 */
    overflow-x: hidden; /* 隐藏横向滚动条 */
    margin-top: 10px;
    border-radius: 8px;
    padding: 5px 5px 10px 5px;
    scrollbar-width: thin; /* Firefox样式 */
    scrollbar-color: var(--secondary-color) transparent; /* Firefox样式 */
}

/* 自定义滚动条样式 - WebKit浏览器 */
.history::-webkit-scrollbar,
.constants-list::-webkit-scrollbar,
.display::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.history::-webkit-scrollbar-track,
.constants-list::-webkit-scrollbar-track,
.display::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 10px;
}

.history::-webkit-scrollbar-thumb,
.constants-list::-webkit-scrollbar-thumb,
.display::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 10px;
    opacity: 0.7;
}

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

/* 设置其他容器默认隐藏滚动条 */
body, .calculator-container, .settings-content {
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
    overflow-x: hidden;
}

/* 隐藏WebKit浏览器的滚动条 */
body::-webkit-scrollbar,
.calculator-container::-webkit-scrollbar,
.settings-content::-webkit-scrollbar {
    display: none;
}

.constant-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    border-radius: 4px;
    margin-bottom: 8px;
    background-color: white;
    box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

.constant-item:hover {
    background-color: rgba(105, 121, 248, 0.05);
    transform: translateY(-1px);
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.15);
}

.constant-definition {
    font-family: 'Roboto Mono', monospace;
    color: var(--text-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 210px; /* 限制宽度 */
}

.constant-actions {
    display: flex;
    gap: 5px;
}

.use-constant-btn, .delete-constant-btn {
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.7;
    transition: all 0.2s ease;
    color: var(--primary-color);
    font-size: 1.2em;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.use-constant-btn:hover, .delete-constant-btn:hover {
    opacity: 1;
    background-color: rgba(105, 121, 248, 0.1);
}

.delete-constant-btn {
    color: #ff6b6b;
}

/* 浏览器兼容性警告样式 */
.browser-warning {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #ffab91;
    color: #7f0000;
    padding: 15px;
    text-align: center;
    z-index: 9999;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.browser-warning p {
    margin: 5px 0;
    font-weight: 500;
}

/* 常量输入标识 */
#constantName::placeholder,
#constantValue::placeholder {
    opacity: 0.7;
    font-size: 0.9em;
}

.number {
    background: var(--button-number);
    font-weight: 600;
}

.operator {
    background: var(--button-operator);
    color: white;
    font-weight: bold;
    font-size: 1.15em;
}

.function {
    background: var(--button-function);
    color: var(--text-color);
}

.equals {
    background: var(--button-equals);
    color: white;
    font-weight: bold;
    font-size: 1.15em;
}

/* 全局隐藏滚动条 */
::-webkit-scrollbar {
    width: 0;
    height: 0;
    display: none;
}

/* Firefox兼容 */
* {
    scrollbar-width: none;
}