/* 默认亮色主题 */
:root {
    --primary-color: #007AFF;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-primary: #000000;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --number-ball-bg: #007AFF;
    --number-ball-text: #ffffff;
    --countdown-bg: #FF3B30;
    --header-bg: #ffffff;
    --header-text: #000000;
    --theme-toggle-hover: rgba(0, 0, 0, 0.05);


    /* 按钮相关变量 */
    --primary-btn-bg: #f5f7fa;
    --primary-btn-text: #007AFF;
    --primary-btn-border: #007AFF;
    --primary-btn-hover-bg: #e8f0fe;
    
    --secondary-btn-bg: #f5f7fa;
    --secondary-btn-text: #666666;
    --secondary-btn-border: #e0e0e0;
    --secondary-btn-hover-bg: #f0f0f0;
}

/* 暗色主题 */
:root[data-theme="dark"] {
    --primary-color: #0A84FF;
    --background-color: #000000;
    --card-background: #1C1C1E;
    --text-primary: #ffffff;
    --text-secondary: #98989F;
    --border-color: #38383A;
    --number-ball-bg: #0A84FF;
    --number-ball-text: #ffffff;
    --countdown-bg: #FF453A;
    --header-bg: #1C1C1E;
    --header-text: #ffffff;
    --theme-toggle-hover: rgba(255, 255, 255, 0.1);

    /* 按钮相关变量 */
    --primary-btn-bg: rgba(10, 132, 255, 0.1);
    --primary-btn-text: #0A84FF;
    --primary-btn-border: #0A84FF;
    --primary-btn-hover-bg: rgba(10, 132, 255, 0.15);
    
    --secondary-btn-bg: rgba(255, 255, 255, 0.05);
    --secondary-btn-text: #98989F;
    --secondary-btn-border: #38383A;
    --secondary-btn-hover-bg: rgba(255, 255, 255, 0.1);
    
}

/* 自动跟随系统主题 */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary-color: #0A84FF;
        --background-color: #000000;
        --card-background: #1C1C1E;
        --text-primary: #ffffff;
        --text-secondary: #98989F;
        --border-color: #38383A;
        --number-ball-bg: #0A84FF;
        --number-ball-text: #ffffff;
        --countdown-bg: #FF453A;
        --header-bg: #1C1C1E;
        --header-text: #ffffff;
        --theme-toggle-hover: rgba(255, 255, 255, 0.1);
    }
}


/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #f0f2f5;  /* 整体背景色 */
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* 整体布局控制 */
.app {
    max-width: 640px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    min-height: 100vh;
    padding-bottom: 52px;
    background: var(--background);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}


/* 底部导航调整 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 640px;
    height: 50px;
    background: var(--card-background);
    border-top: 1px solid var(--border-color);
    display: flex;
    z-index: 900;
}

.bottom-nav-container {
    width: 100%;
    display: flex;
    justify-content: space-around;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 12px;
    gap: 4px;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item i {
    font-size: 20px;
}

/* 暗色模式适配 */
:root[data-theme="dark"] body {
    background: #252525;
}

:root[data-theme="dark"] .app {
    background: #000;
}


/* 头部样式 */
.header {

    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    max-width: 640px;
    margin:0 auto;
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

}

.header-content {
    max-width: 640px;
    margin: 0 auto;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
}

.header h1 {
    font-size: 18px;
    color: var(--header-text);
    font-weight: 600;
}


/* 添加过渡效果 */
body {
    transition: background-color 0.3s ease, color 0.3s ease;
}

.lottery-card,
.header,
.theme-toggle,
.number-ball {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* 主题切换按钮样式 */
.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: var(--theme-toggle-hover);
}

.theme-toggle i {
    font-size: 20px;
}