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

:root {
    --primary-color: #4285f4;
    --primary-light: #e8f0fe;
    --secondary-color: #34a853;
    --text-color: #333333;
    --light-text: #666666;
    --border-color: #e0e0e0;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    --radius: 10px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 25px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* 头部样式优化 */
.site-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.logo-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.logo-wrapper img {
    margin-right: 10px;
    width: 40px;
    height: 40px;
}

.logo-wrapper h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 0;
}

.site-description {
    color: var(--light-text);
    font-size: 1rem;
}

/* 标题样式 */
h2 {
    margin-bottom: 15px;
    font-size: 1.3rem;
    color: var(--primary-color);
    position: relative;
    padding-left: 15px;
}

h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 20px;
    background-color: var(--primary-color);
    border-radius: 3px;
}

/* 区域容器优化 */
.rooms-container, .create-room-container {
    margin-bottom: 30px;
    padding: 20px;
    border-radius: var(--radius);
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    border: none;
}

/* 房间列表优化 */
.rooms-list {
    margin-top: 15px;
}

.room-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    margin-bottom: 15px;
    border-radius: var(--radius);
    background-color: var(--primary-light);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.room-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.room-info {
    flex: 1;
}

.room-info h3 {
    margin-bottom: 6px;
    font-size: 1.1rem;
    color: var(--primary-color);
}

.room-info p {
    color: var(--light-text);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.room-status {
    display: inline-block;
    padding: 3px 10px;
    background: var(--primary-color);
    color: white;
    border-radius: 30px;
    font-size: 0.8rem;
    margin-top: 5px;
}

.join-room-btn {
    padding: 8px 20px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: bold;
}

.join-room-btn:hover {
    opacity: 0.9;
    transform: scale(1.05);
}

.join-room-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
}

.no-rooms, .loading, .error {
    padding: 25px;
    text-align: center;
    color: var(--light-text);
    background-color: var(--primary-light);
    border-radius: var(--radius);
    margin-top: 10px;
}

.error {
    color: #d9534f;
    background-color: #ffe6e6;
}

/* 表单样式优化 */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

input[type="text"], textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-family: inherit;
    transition: var(--transition);
}

input[type="text"]:focus, textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(66, 133, 244, 0.2);
}

textarea {
    height: 100px;
    resize: vertical;
}

.primary-btn {
    padding: 12px 25px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-weight: bold;
    transition: var(--transition);
    display: block;
    width: 100%;
    font-size: 1rem;
}

.primary-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.primary-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 页脚优化 */
.site-footer {
    margin-top: 30px;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.site-footer p {
    font-size: 0.9rem;
    color: var(--light-text);
}

/* 访问量显示优化 */
.visitors-counter {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 10px 0 15px;
    font-size: 0.9rem;
    color: var(--light-text);
}

.visitors-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 5px;
    padding: 3px 12px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 30px;
    font-weight: bold;
}

.visitors-icon {
    display: inline-block;
    margin-right: 5px;
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='white' viewBox='0 0 24 24'%3E%3Cpath d='M12 12c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm0 2c-2.67 0-8 1.34-8 4v2h16v-2c0-2.66-5.33-4-8-4z'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-size: contain;
}

/* 响应式优化 */
@media (max-width: 600px) {
    .container {
        padding: 15px;
        margin: 0;
        width: 100%;
        box-shadow: none;
        border-radius: 0;
    }
    
    .rooms-container, .create-room-container {
        padding: 15px;
        margin-bottom: 20px;
    }
    
    .room-item {
        flex-direction: column;
        align-items: flex-start;
        padding: 12px;
    }
    
    .room-info {
        margin-bottom: 15px;
        width: 100%;
    }
    
    .join-room-btn {
        width: 100%;
        padding: 10px;
    }
    
    .primary-btn {
        padding: 12px 15px;
    }
    
    body {
        padding: 0;
    }
    
    h2 {
        font-size: 1.1rem;
    }
    
    .logo-wrapper h1 {
        font-size: 1.8rem;
    }
    
    .loading svg {
        width: 20px;
        height: 20px;
    }
}

/* 为移动设备添加额外的动画和过渡效果 */
@media (max-width: 600px) {
    .room-item:active {
        transform: scale(0.98);
    }
    
    .primary-btn:active, .join-room-btn:active {
        transform: scale(0.95);
    }
}

/* 添加暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #5c9cff;
        --primary-light: #1c3251;
        --secondary-color: #4caf50;
        --text-color: #e0e0e0;
        --light-text: #b0b0b0;
        --border-color: #444444;
        --bg-color: #121212;
        --card-bg: #1e1e1e;
    }
    
    .no-rooms, .loading {
        background-color: #1c3251;
    }
    
    .error {
        background-color: #3a1a1a;
    }
}

/* 添加加载图标的动画 */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.loading-icon {
    animation: rotate 2s linear infinite;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* 优化表单按钮内的图标显示 */
.primary-btn svg {
    display: inline-block;
    vertical-align: middle;
    margin-right: 5px;
}

/* 优化房间列表的空状态 */
.no-rooms {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 30px 20px;
}

/* 下拉刷新指示器样式 */
.refresh-indicator {
    height: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    color: var(--primary-color);
    width: 100%;
    opacity: 0;
    border-radius: var(--radius) var(--radius) 0 0;
    margin: -25px -25px 0;
    padding: 0 25px;
    position: relative;
    z-index: 5;
    transition: all 0.3s ease;
}

.refresh-indicator span {
    margin-left: 8px;
    font-size: 0.9rem;
}

.refresh-icon {
    transition: transform 0.3s ease;
}

.refresh-icon.ready {
    transform: rotate(180deg);
}

.refresh-icon.refreshing {
    animation: spin 1.5s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* 响应式样式调整 */
@media (max-width: 600px) {
    .refresh-indicator {
        margin: -15px -15px 0;
        padding: 0 15px;
    }
}

/* 房间页面样式 */
.back-btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 15px;
    background: var(--primary-light);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 30px;
    font-size: 0.9rem;
    margin-top: 10px;
    transition: var(--transition);
}

.back-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(-5px);
}

.back-btn svg {
    margin-right: 5px;
}

.connection-area, .file-transfer-area {
    margin-bottom: 30px;
    padding: 20px;
    border-radius: var(--radius);
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
}

/* 状态指示器 */
.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    color: var(--primary-color);
    padding: 12px;
    border-radius: var(--radius);
    margin: 15px 0;
}

.status-indicator.connecting .status-svg {
    animation: rotate 2s linear infinite;
}

.status-indicator.connected {
    background-color: rgba(52, 168, 83, 0.1);
    color: #34a853;
}

.status-indicator.error {
    background-color: rgba(234, 67, 53, 0.1);
    color: #ea4335;
}

.status-icon {
    margin-right: 10px;
}

.status-text {
    font-weight: 500;
}

/* 参与者信息 */
.participants-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 20px 0;
    background-color: var(--bg-color);
    border-radius: var(--radius);
    padding: 15px;
}

.participant {
    display: flex;
    align-items: center;
    flex: 1;
}

.participant-icon {
    margin-right: 10px;
    color: var(--primary-color);
}

.participant-details {
    flex: 1;
}

.participant-label {
    font-size: 0.8rem;
    color: var(--light-text);
    margin-bottom: 5px;
}

.participant-id {
    font-family: monospace;
    font-size: 0.9rem;
    background-color: var(--card-bg);
    padding: 5px 10px;
    border-radius: 5px;
    word-break: break-all;
}

.participant-divider {
    margin: 0 20px;
    color: var(--border-color);
}

/* 文件上传区域 */
.file-input-container {
    margin-bottom: 15px;
}

.file-input-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    border: 2px dashed var(--primary-color);
    color: var(--primary-color);
    padding: 20px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 10px;
}

.file-input-label:hover {
    background-color: rgba(66, 133, 244, 0.2);
}

.file-input-label svg {
    margin-bottom: 10px;
}

.file-input-label input[type="file"] {
    position: absolute;
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    z-index: -1;
}

.selected-file-info {
    background-color: var(--bg-color);
    padding: 10px 15px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

/* 进度条样式 */
.progress-container {
    margin-top: 15px;
    display: none; /* 默认隐藏，通过JS控制显示 */
}

.progress-stats {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.progress-bar-outer {
    height: 8px;
    background-color: var(--bg-color);
    border-radius: 20px;
    overflow: hidden;
}

.progress-bar-inner {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 20px;
    transition: width 0.3s ease;
}

/* 接收文件区域 */
.incoming-file-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    background-color: var(--primary-light);
    border-radius: var(--radius);
    color: var(--primary-color);
    margin-bottom: 15px;
    text-align: center;
}

.incoming-file-info svg {
    margin-bottom: 15px;
    opacity: 0.7;
}

.download-area {
    margin-top: 15px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: var(--transition);
    margin-top: 10px;
}

.download-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.download-btn svg {
    margin-right: 8px;
}

/* 移动设备适配 */
@media (max-width: 600px) {
    .participants-container {
        flex-direction: column;
        gap: 15px;
    }
    
    .participant {
        width: 100%;
    }
    
    .participant-divider {
        width: 100%;
        display: flex;
        justify-content: center;
        margin: 5px 0;
    }
    
    .status-indicator {
        padding: 10px;
    }
    
    .file-input-label {
        padding: 15px;
    }
    
    .connection-area, .file-transfer-area {
        padding: 15px;
        margin-bottom: 20px;
    }
}