/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 登录页面样式 */
.login-box {
    max-width: 400px;
    margin: 100px auto;
    padding: 30px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.login-box h1 {
    margin-bottom: 30px;
    color: #333;
    font-size: 24px;
}

.login-options {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.3s;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.btn-primary {
    background-color: #007bff;
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #545b62;
}

/* 表单样式 */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #666;
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-control:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
}

/* 消息提示 */
.alert {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background-color: #cce5ff;
    color: #004085;
    border: 1px solid #b8daff;
}

/* 仪表板样式 */
.header {
    background: #fff;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.user-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-content {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.main-content h2 {
    margin-bottom: 20px;
    color: #333;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.tool-card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.tool-card h3 {
    margin-bottom: 10px;
    color: #333;
}

.tool-card p {
    color: #666;
    margin-bottom: 15px;
    min-height: 48px;
}

/* 用户后台新样式 */
.dashboard-container {
    display: flex;
    min-height: 100vh;
    background-color: #f8f9fa;
}

.dashboard-sidebar {
    width: 240px;
    background-color: #2c3e50;
    color: #fff;
    padding: 0;
    position: fixed;
    height: 100vh;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 {
    margin: 0;
    font-size: 24px;
    color: #fff;
}

.sidebar-user {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-user .welcome {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 5px;
    display: block;
}

.sidebar-user .username {
    font-size: 16px;
    font-weight: bold;
}

.sidebar-nav {
    padding: 15px 0;
}

.sidebar-nav .nav-title {
    padding: 10px 20px;
    font-size: 12px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
    font-weight: bold;
    letter-spacing: 1px;
}

.sidebar-nav a {
    display: block;
    padding: 12px 20px;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover, 
.sidebar-nav a.active {
    background-color: rgba(255,255,255,0.1);
    border-left-color: #3498db;
}

.sidebar-nav a i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.dashboard-content {
    flex: 1;
    padding: 20px;
    margin-left: 240px;
}

.content-header {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.content-header h1 {
    margin: 0;
    font-size: 24px;
    color: #2c3e50;
}

.tool-container {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 20px;
    margin-bottom: 20px;
}

.tool-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.tool-header h2 {
    margin: 0;
    font-size: 20px;
    color: #2c3e50;
}

.tool-description {
    color: #666;
    margin-bottom: 20px;
}

.tool-form .form-group {
    margin-bottom: 20px;
}

.tool-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.tool-form .form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.tool-form .form-control:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 0 2px rgba(52,152,219,0.25);
}

.tool-form textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.tool-form .btn-group {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.tool-result {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 4px;
    border-left: 4px solid #3498db;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .dashboard-sidebar {
        width: 200px;
    }
    .dashboard-content {
        margin-left: 200px;
    }
}

@media (max-width: 768px) {
    .dashboard-container {
        flex-direction: column;
    }
    .dashboard-sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    .dashboard-content {
        margin-left: 0;
    }
}