:root {
    --sidebar-bg: #ffffff;
    --main-bg: #f8f9fa;
    --accent-color: #3a7bd5;
    --text-main: #2d3436;
    --text-muted: #636e72;
    --border-color: #e1e4e8;
}

body, form, .masterwrapper {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.masterwrapper {
    display: flex;
    min-height: 100vh;
    background-color: var(--main-bg);
}

/* Professional Light Sidebar */
#mastersidebar {
    min-width: 260px;
    max-width: 260px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

    #mastersidebar .mastersidebar-header {
        padding: 25px 20px;
        border-bottom: 1px solid var(--border-color);
        text-align: center;
    }

.brand-text {
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: -0.5px;
    font-size: 1.4rem;
}

/* Navigation Links */
#mastersidebar ul.nav-flex-column {
    padding: 20px 0;
    margin: 0;
    list-style: none;
}

#mastersidebar .nav-link {
    padding: 12px 25px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
}

    #mastersidebar .nav-link i {
        margin-right: 12px;
        width: 20px;
        text-align: center;
    }

    #mastersidebar .nav-link:hover {
        color: var(--accent-color);
        background: #f0f7ff;
        border-right: 3px solid var(--accent-color);
    }

/* Content Area Customization */
.mastercontent-area {
    flex-grow: 1;
    padding: 30px;
    overflow-y: auto;
}

.content-card {
    background: #ffffff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    border: 1px solid var(--border-color);
}

footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .masterwrapper {
        flex-direction: column;
    }

    #mastersidebar {
        min-width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}