/* 全局样式 */
body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column; /* 垂直排列内容 */
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: #fff; /* 全局文字颜色，确保在深色背景上可见 */
    background-image: url('bj.jpg'); /* 设置背景图片 */
    background-size: cover; /* 确保背景图片覆盖整个视口 */
    background-position: center; /* 图片居中显示 */
    background-repeat: no-repeat; /* 不重复平铺图片 */
    background-color: rgba(0, 0, 0, 0.5); /* 黑色半透明层，50%透明度 */
    background-blend-mode: overlay; /* 混合模式，使黑色层与图片混合 */
    padding: 20px; /* 整体内边距 */
    box-sizing: border-box; /* 边框盒模型 */
    gap: 30px; /* 增加卡片之间的间距 */
}

/* 统一卡片基础样式 */
.card-base {
    background: rgba(255, 255, 255, 0.25); /* 统一的毛玻璃效果 */
    backdrop-filter: blur(20px); /* 统一的模糊度 */
    border-radius: 20px; /* 统一的圆角 */
    border: 1px solid rgba(255, 255, 255, 0.3); /* 统一的边框 */
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3); /* 统一的阴影 */
    text-align: center;
    width: 90%;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
/* --- v1.3 音乐播放器样式 --- */
#music-player-card {
    max-width: 800px;
    padding: 20px 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}
#song-title {
    font-size: 1.5em;
    font-weight: bold;
    color: #f0f0f0;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.7);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.progress-container {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 15px;
}
#progress-bar-container {
    flex-grow: 1;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    height: 10px;
    cursor: pointer;
    overflow: hidden;
}
#progress-bar {
    width: 0%;
    height: 100%;
    background-color: #f0f0f0;
    border-radius: 5px;
    transition: width 0.1s linear;
}
#time-display {
    font-size: 1em;
    font-family: 'Consolas', 'Courier New', monospace;
    color: #e0e0e0;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

/* v1.6 优化布局 */
.player-controls {
    display: flex;
    justify-content: space-between; /* 让主控制和音量控制分布在两侧 */
    align-items: center;
    gap: 20px;
}
.main-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.control-button {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    color: #fff;
}
.control-button:hover {
    background: rgba(255, 255, 255, 0.25);
}
.control-button:active {
    transform: scale(0.95);
}
#play-pause-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
}
#play-pause-btn img {
    width: 50%;
    height: 50%;
}
#next-btn {
    width: 100px;
    height: 40px;
    border-radius: 20px;
    font-size: 1em;
    font-weight: bold;
}

/* v1.6 新增：音量控制样式 */
.volume-container {
    display: flex;
    align-items: center;
    gap: 10px;
}
#volume-icon {
    font-size: 1.5em;
    cursor: pointer;
}
#volume-slider {
    -webkit-appearance: none; /* 移除默认样式 */
    appearance: none;
    width: 100px; /* 滑块宽度 */
    height: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 5px;
    outline: none;
    transition: opacity 0.2s;
}
/* 自定义滑块样式 (Chrome, Safari) */
#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
}
/* 自定义滑块样式 (Firefox) */
#volume-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}
.card-base:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* 顶部标题样式 */
.site-header {
    max-width: 800px;
    padding: 20px 30px;
    font-size: 2.2em;
    font-weight: bold;
    color: #f0f0f0;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.7);
}

/* 时钟容器样式 */
.clock-container {
    max-width: 600px;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#current-time {
    font-size: 5em;
    font-weight: bold;
    letter-spacing: 3px;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.8);
    line-height: 1.2;
    white-space: nowrap;
}

#current-date {
    font-size: 1.8em;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
}

.uptime-display {
    font-size: 1.4em;
    color: #e0e0e0;
    line-height: 1.5;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.4);
    word-break: break-all;
}
.uptime-display span {
    font-weight: bold;
    color: #fff;
}

/* 联系方式卡片样式 */
.contact-card {
    max-width: 600px;
    padding: 30px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.contact-item:hover {
    transform: scale(1.1) translateY(-5px);
}

.contact-item img {
    width: 60px;
    height: 60px;
    margin-bottom: 10px;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.5));
}

.contact-item span {
    font-size: 1.1em;
    font-weight: bold;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.6);
}

/* 自我介绍卡片样式 */
.about-me-card {
    max-width: 600px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    text-align: left;
}

.about-me-card p {
    margin: 0;
    font-size: 1.2em;
    line-height: 1.6;
    color: #e0e0e0;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.4);
}

.about-me-card .github-link {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: inherit;
    margin-top: 15px;
    transition: transform 0.3s ease;
    cursor: pointer;
}

.about-me-card .github-link:hover {
    transform: scale(1.05) translateY(-3px);
}

.about-me-card .github-link img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
    filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.5));
}

.about-me-card .github-link span {
    font-size: 1.1em;
    font-weight: bold;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.6);
}

/* 小工具集合卡片样式 */
.widgets-card {
    max-width: 600px;
    padding: 20px 30px 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    text-align: left;
}

.widgets-card h2 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.8em;
    font-weight: bold;
    color: #f0f0f0;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.7);
    text-align: center;
}

.widgets-card .widget-item {
    display: block;
    text-decoration: none;
    color: #f0f0f0;
    font-size: 1.3em;
    font-weight: bold;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.7);
    padding: 10px 15px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    transition: background 0.3s ease, transform 0.3s ease;
    cursor: pointer;
    text-align: center;
}

.widgets-card .widget-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.02);
}

/* 弹窗样式 */
#popup-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    visibility: hidden;
    opacity: 0;
    transition: visibility 0.3s, opacity 0.3s;
}

#popup-container.show {
    visibility: visible;
    opacity: 1;
}

.popup-card {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    padding: 30px;
    max-width: 90%;
    max-height: 90%;
    overflow-y: auto;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #f0f0f0;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
    animation: fadeInScale 0.3s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.popup-card h2 {
    margin-top: 0;
    font-size: 2em;
    margin-bottom: 20px;
    text-align: center;
}

.close-button {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 30px;
    height: 30px;
    background: url('x.png') no-repeat center center / contain;
    border: none;
    cursor: pointer;
    z-index: 10;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.close-button:hover {
    opacity: 1;
}

/* 计算器样式 */
.calculator {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    width: 300px;
    max-width: 100%;
    padding: 10px;
}

#calculator-display {
    grid-column: 1 / -1;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px;
    font-size: 2.5em;
    text-align: right;
    color: #fff;
    margin-bottom: 15px;
    overflow: hidden;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
    height: 1.5em;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.calc-button {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 15px;
    font-size: 1.5em;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
}

.calc-button:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.calc-button:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.clear-button { background: rgba(220, 80, 80, 0.4); }
.clear-button:hover { background: rgba(220, 80, 80, 0.6); }
.operator { background: rgba(200, 150, 80, 0.4); }
.operator:hover { background: rgba(200, 150, 80, 0.6); }
.function-button { background: rgba(150, 150, 150, 0.3); }
.function-button:hover { background: rgba(150, 150, 150, 0.5); }
.equals-button { background: rgba(80, 200, 80, 0.4); }
.equals-button:hover { background: rgba(80, 200, 80, 0.6); }

/* 搜索框弹窗样式 */
.search-popup-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    width: 300px;
    max-width: 100%;
}
.search-popup-content input[type="text"] {
    width: 100%;
    padding: 12px 15px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 1.1em;
    box-sizing: border-box;
    outline: none;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.4);
    transition: background 0.2s, border-color 0.2s;
}
.search-popup-content input[type="text"]::placeholder { color: rgba(255, 255, 255, 0.6); }
.search-popup-content input[type="text"]:focus {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}
.search-popup-content button {
    background: rgba(80, 150, 220, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    padding: 10px 20px;
    font-size: 1.1em;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}
.search-popup-content button:hover {
    background: rgba(80, 150, 220, 0.6);
    transform: translateY(-2px);
}
.search-popup-content button:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}


/* --- v1.1 新增：通知框样式 (Toast Notification) --- */
#toast-notification {
    /* 固定在屏幕顶部中央 */
    position: fixed;
    top: -100px; /* 初始状态，藏在屏幕上方 */
    left: 50%;
    transform: translateX(-50%);

    /* 沿用你的毛玻璃设计，但用了代表“成功”的绿色调 */
    background: rgba(46, 204, 113, 0.7); /* 成功的绿色，带70%透明度 */
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    
    color: #fff;
    padding: 12px 25px;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    
    font-size: 1.1em;
    font-weight: bold;
    text-shadow: 0 1px 3px rgba(0,0,0,0.2);
    
    z-index: 9999; /* 确保它在所有元素之上 */
    
    /* 定义动画：当top或opacity变化时，平滑过渡0.5秒 */
    transition: top 0.5s ease-in-out, opacity 0.5s ease-in-out;
    
    /* 默认完全隐藏 */
    opacity: 0;
    visibility: hidden;
    
    /* 确保文字不会太长而换行 */
    white-space: nowrap;
}

/* 当JS给通知框添加 .show 类时触发，实现滑入效果 */
#toast-notification.show {
    top: 20px; /* 移动到屏幕内可见位置 */
    opacity: 1;
    visibility: visible;
}


/* 响应式调整 */
@media (max-width: 768px) {
    .site-header { font-size: 1.8em; padding: 15px 20px; }
    .clock-container { padding: 30px; }
    #current-time { font-size: 3.5em; letter-spacing: 1px; }
    #current-date { font-size: 1.4em; }
    .uptime-display { font-size: 1.1em; }
    .contact-card, .about-me-card, .widgets-card { padding: 20px; }
    .contact-item img { width: 50px; height: 50px; }
    .contact-item span { font-size: 1em; }
    .about-me-card p { font-size: 1.1em; }
    .about-me-card .github-link img { width: 35px; height: 35px; }
    .about-me-card .github-link span { font-size: 1em; }
    .widgets-card .widget-item { font-size: 1.1em; padding: 8px 12px; }
    .popup-card { padding: 20px; }
    .popup-card h2 { font-size: 1.8em; margin-bottom: 15px; }
    .close-button { width: 25px; height: 25px; top: 10px; right: 10px; }
    .calculator { width: 280px; }
    #calculator-display { font-size: 2em; }
    .calc-button { font-size: 1.3em; padding: 12px; }
    .search-popup-content input[type="text"], .search-popup-content button { font-size: 1em; padding: 10px 12px; }
}

@media (max-width: 480px) {
    .site-header { font-size: 1.5em; padding: 10px 15px; }
    .clock-container { padding: 20px; }
    #current-time { font-size: 2.5em; }
    #current-date { font-size: 1.1em; }
    .uptime-display { font-size: 0.9em; }
    .contact-card, .about-me-card, .widgets-card { padding: 15px; }
    .contact-item img { width: 40px; height: 40px; }
    .contact-item span { font-size: 0.9em; }
    .about-me-card p { font-size: 1em; }
    .about-me-card .github-link img { width: 30px; height: 30px; }
    .about-me-card .github-link span { font-size: 0.9em; }
    .widgets-card .widget-item { font-size: 1em; padding: 6px 10px; }
    .popup-card { padding: 15px; }
    .popup-card h2 { font-size: 1.5em; margin-bottom: 10px; }
    .close-button { width: 20px; height: 20px; top: 8px; right: 8px; }
    .calculator { width: 250px; gap: 8px; }
    #calculator-display { font-size: 1.8em; padding: 10px; }
    .calc-button { font-size: 1.2em; padding: 10px; }
    .search-popup-content input[type="text"], .search-popup-content button { font-size: 0.9em; padding: 8px 10px; }
}
#music-player-card {
    max-width: 800px; /* 与标题栏宽度一致 */
    padding: 20px 30px;
    display: flex;
    flex-direction: column;
    gap: 15px; /* 各元素之间的间距 */
}

#song-title {
    font-size: 1.5em;
    font-weight: bold;
    color: #f0f0f0;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.7);
    white-space: nowrap; /* 防止歌名过长换行 */
    overflow: hidden;
    text-overflow: ellipsis; /* 超出部分显示省略号 */
}

.progress-container {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 15px;
}

#progress-bar-container {
    flex-grow: 1; /* 让进度条容器占据剩余空间 */
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    height: 10px;
    cursor: pointer; /* 提示用户这里可以点击 */
    overflow: hidden;
}

#progress-bar {
    width: 0%; /* 初始宽度为0, JS会更新它 */
    height: 100%;
    background-color: #f0f0f0;
    border-radius: 5px;
    transition: width 0.1s linear; /* 让进度条更新更平滑 */
}

#time-display {
    font-size: 1em;
    font-family: 'Consolas', 'Courier New', monospace; /* 使用等宽字体，数字不会跳动 */
    color: #e0e0e0;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

.player-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.control-button {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%; /* 圆形按钮 */
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
    color: #fff;
}

.control-button:hover {
    background: rgba(255, 255, 255, 0.25);
}

.control-button:active {
    transform: scale(0.95);
}

#play-pause-btn {
    width: 60px;
    height: 60px;
}

#play-pause-btn img {
    width: 50%; /* 图标大小相对于按钮 */
    height: 50%;
    /* 当暂停时，我们可以用JS给它加一个类来改变样式 */
    transition: transform 0.3s ease;
}

#play-pause-btn.playing img {
    /* 播放时可以给图标一个微妙的旋转效果，假装在“播放” */
    /* transform: rotate(360deg); */
}


#next-btn {
    width: 100px;
    height: 40px;
    border-radius: 20px; /* 胶囊形状 */
    font-size: 1em;
    font-weight: bold;
}


/* --- 后台登录页面专属样式 (添加到 style.css 末尾) --- */

.login-card {
    max-width: 420px; /* 登录卡片的最大宽度 */
    padding: 40px 30px;
    display: flex;
    flex-direction: column; /* 内部元素垂直排列 */
    gap: 20px; /* 元素之间的间距 */
}

.login-card h1 {
    font-size: 2em;
    margin: 0 0 10px 0;
    color: #f0f0f0;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.7);
}

.login-card input[type="password"] {
    width: 100%;
    padding: 15px;
    font-size: 1.1em;
    color: #fff;
    background: rgba(0, 0, 0, 0.2); /* 半透明背景 */
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    box-sizing: border-box;
    text-align: center;
    transition: all 0.3s ease;
}

.login-card input[type="password"]::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.login-card input[type="password"]:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.3);
}

.login-card button {
    padding: 15px;
    font-size: 1.2em;
    font-weight: bold;
    color: #fff;
    background: rgba(255, 255, 255, 0.15); /* 沿用按钮风格 */
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.login-card button:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.login-card button:active {
    transform: scale(0.98);
}

.login-error-message {
    color: #ffcdd2; /* 使用柔和的红色作为错误提示 */
    text-align: center;
    height: 20px;
    font-size: 1em;
    font-weight: bold;
    text-shadow: 0 0 5px rgba(0,0,0,0.5);
}