/* 原始基本样式 */
body {
    margin: 0;
    font-family: "Microsoft YaHei", Arial, sans-serif;
}

.topbar {
    height: 50px;
    background: #1976d2;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.logo {
    font-size: 18px;
    font-weight: bold;
}

.userinfo a {
    color: #fff;
    text-decoration: none;
}

/* 布局 */
.container {
    display: flex;
    height: calc(100vh - 50px);
}

.sidebar {
    width: 180px;
    background: #f5f5f5;
    border-right: 1px solid #ddd;
}

.sidebar ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.sidebar li a {
    display: block;
    padding: 10px 15px;
    color: #333;
    text-decoration: none;
}

.sidebar li a:hover {
    background: #e0e0e0;
}

.sidebar li a.active {
    background: #1976d2;
    color: white;
}

.main {
    flex: 1;
    padding: 15px 20px;
    overflow: auto;
}

/* 表格 */
.mail-table {
    width: 100%;
    border-collapse: collapse;
}

.mail-table th,
.mail-table td {
    border: 1px solid #ddd;
    padding: 8px;
}

.mail-table tr:nth-child(even) {
    background: #f9f9f9;
}

.mail-table th {
    background: #eee;
}

/* 登录/注册页 */
.auth-body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #e3f2fd;
}

.auth-box {
    background: #fff;
    padding: 20px 30px;
    border-radius: 6px;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
    width: 320px;
}

.auth-box h2 {
    text-align: center;
}

.form-row {
    margin-bottom: 10px;
    position: relative;
}

.form-row label {
    display: block;
    margin-bottom: 4px;
}

.form-row input,
.form-row textarea,
.form-row select {
    width: 100%;
    box-sizing: border-box;
    padding: 6px;
}

button {
    padding: 6px 14px;
    cursor: pointer;
    margin-right: 5px;
    border: 1px solid #ccc;
    background: #1976d2;
    color: white;
    border-radius: 3px;
}

button:hover {
    background: #1565c0;
}

.error {
    color: red;
    margin-top: 10px;
}

/* 邮件标记样式 - 增强 */
.mail-unread {
    font-weight: bold;
    background-color: #f0f8ff;
}

.mail-starred {
    color: #ff9900;
}

.mail-important {
    border-left: 4px solid #ff4444;
    background-color: #fff5f5;
}

/* 附件列表样式 - 新增 */
.attachment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.attachment-item {
    padding: 10px;
    margin-bottom: 8px;
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: background-color 0.2s;
}

.attachment-item:hover {
    background: #e9ecef;
}

.attachment-icon {
    margin-right: 10px;
    font-size: 20px;
}

.attachment-info {
    flex: 1;
}

.attachment-name {
    font-weight: 500;
    color: #1976d2;
    word-break: break-all;
}

.attachment-size {
    font-size: 12px;
    color: #6c757d;
}

.download-btn {
    padding: 4px 12px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
}

.download-btn:hover {
    background: #218838;
    text-decoration: none;
    color: white;
}

/* 按钮组样式 */
.btn-group {
    display: inline-block;
    margin-right: 10px;
}

.btn {
    padding: 4px 8px;
    margin-right: 2px;
    border: 1px solid #ccc;
    background: #f5f5f5;
    cursor: pointer;
    font-size: 12px;
    color: #333;
    transition: all 0.2s;
}

.btn:hover {
    background: #e0e0e0;
}

/* 操作按钮区域 */
.action-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    padding: 10px;
    background: #f5f5f5;
    border-radius: 4px;
    flex-wrap: wrap;
}

/* 邮件标记按钮 */
.star-btn {
    background: #ff9900;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.star-btn:hover {
    background: #e68900;
}

.important-btn {
    background: #ff4444;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.important-btn:hover {
    background: #e63939;
}

/* 搜索框样式 */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    align-items: center;
}

.search-box input[type="text"] {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #ddd;
    }

    .sidebar ul {
        display: flex;
        flex-wrap: wrap;
    }

    .sidebar li {
        flex: 1;
        text-align: center;
    }

    .action-buttons {
        flex-direction: column;
    }

    .action-buttons button {
        width: 100%;
        margin-bottom: 5px;
    }

    .attachment-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .attachment-icon {
        margin-bottom: 5px;
    }

    .download-btn {
        margin-top: 8px;
        width: 100%;
        text-align: center;
    }
}

/* 表单验证样式 */
input:invalid, textarea:invalid {
    border-color: #ff4444;
}

input:valid, textarea:valid {
    border-color: #4CAF50;
}

/* 提示信息 */
.hint {
    font-size: 12px;
    color: #666;
    margin-top: 2px;
}