/* 全局和布局 */
body {
    background-color: #f0f2f5;
    color: #333;
}

.page-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-wrapper {
    display: flex;
    flex-grow: 1;
}

.sidebar {
    width: 240px;
    flex-shrink: 0;
    background-color: #ffffff;
    border-right: 1px solid #e9ecef;
}

.main-content {
    flex-grow: 1;
    padding: 2rem;
    background-color: #f8f9fa;
}

/* 头部 */
.navbar {
    border-bottom: 1px solid #e9ecef;
}

/* 侧边栏 */
.sidebar .sidebar-sticky {
    padding-top: 1rem;
}
.sidebar .nav-link {
    color: #555;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    margin: 0.1rem 0.5rem;
    transition: background-color 0.2s, color 0.2s;
}
.sidebar .nav-link i {
    margin-right: 0.8rem;
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}
.sidebar .nav-link:hover {
    background-color: #e9ecef;
    color: #000;
}
.sidebar .nav-link.active {
    background-color: #0d6efd;
    color: #fff;
}
.sidebar .sidebar-heading {
    font-size: 0.8rem;
    text-transform: uppercase;
}


/* 工具卡片 */
.tool-card {
    background-color: #fff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
}
.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.tool-card .tool-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    margin-right: 1.5rem;
}
.tool-card .tool-icon img {
    width: 100%;
    height: 100%;
}
.tool-card .tool-info h5 {
    margin-bottom: 0.5rem;
    font-weight: 600;
}
.tool-card .tool-info p {
    color: #6c757d;
    font-size: 0.9rem;
    margin: 0;
}
.tool-card .vip-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: #ffc107;
    color: #000;
    padding: 0.2em 0.5em;
    font-size: 0.75rem;
    border-radius: 0.25rem;
    font-weight: bold;
}


/* 表单和按钮 */
.form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
    border-color: #86b7fe;
}
.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

/* 页脚 */
.footer {
    background-color: #ffffff;
    border-top: 1px solid #e9ecef;
    padding: 1rem 0;
}
.footer a {
    color: #6c757d;
    text-decoration: none;
}
.footer a:hover {
    color: #0d6efd;
}