/* Base Reset & Application Framework */
html, body, .mainPage_body {
    padding: 0;
    margin: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

/* Base Interactive Menu Buttons (Elevated Hover & Active Colors) */
.mainPage_menuItem {
    padding: 10px 15px;
    border: none;
    background: transparent;
    color: #333;
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    text-align: left;
    z-index:10000;
}

/* Elevation styling on hover */
.mainPage_menuItem:hover {
    background-color: #ffffff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.12), 0 1px 3px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
    color: #000;
    z-index:10000;
}

/* Active persistent select state (Yellow Color) */
.mainPage_menuItem.mainPage_selected {
    background-color: #ffeb3b !important;
    color: #000 !important;
    font-weight: bold;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
    transform: translateY(0);
    z-index:10000;
}

/* Global Structural Header */
.mainPage_header {
    height: 50px;
    background-color: #f1f1f1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    border-bottom: 1px solid #ccc;
    z-index: 100;
}

.mainPage_title {
    font-weight: bold;
    font-size: 1.2rem;
}

/* Main Layout Viewport Wrap */
.mainPage_mainContainer {
    flex: 1;
    display: flex;
    flex-direction: row;
    overflow: hidden;
    position: relative;
}

/* Flexible content box wrapper to keep bounds centered */
.mainPage_contentWrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    background-color: #ffffff;
    overflow: hidden;
}

/* Scrollable Layout Content Columns */
.mainPage_leftMenu, 
.mainPage_rightMenu, 
.mainPage_content,
.mainPage_leftHamburgerMenu,
.mainPage_rightHamburgerMenu {
    overflow-y: auto;
    height: 100%;
}

/* Central layout limited strictly to 800px max width */
.mainPage_content {
    width: 100%;
    max-width: 800px;
    padding: 20px;
    background-color: #ffffff;
}

.mainPage_leftMenu, .mainPage_rightMenu {
    width: 200px;
    background-color: #fafafa;
    display: flex;
    flex-direction: column;
    padding: 10px 0;
    gap: 4px;
}

.mainPage_leftMenu { border-right: 1px solid #ccc; }
.mainPage_rightMenu { border-left: 1px solid #ccc; }

/* Global Structural Footer */
.mainPage_footer {
    background-color: #f1f1f1;
    border-top: 1px solid #ccc;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.mainPage_marquee {
    height: 20px;
    line-height: 20px;
    background-color: #ddd;
    font-size: 12px;
}

/* Off-screen Mobile Side Drawers */
.mainPage_leftHamburgerMenu,
.mainPage_rightHamburgerMenu {
    position: fixed;
    top: 50px;
    width: 250px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.3);
    transition: transform 0.3s ease;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    padding: 10px 0;
    gap: 4px;
}

.mainPage_leftHamburgerMenu {
    left: 0;
    transform: translateX(-100%);
    border-right: 1px solid #ccc;
    z-index:10000;
}

.mainPage_rightHamburgerMenu {
    right: 0;
    transform: translateX(100%);
    border-left: 1px solid #ccc;
    z-index:10000;
}

/* Action Classes managed by JS */
.mainPage_leftHamburgerMenu.mainPage_active,
.mainPage_rightHamburgerMenu.mainPage_active {
    transform: translateX(0);
}

/* ========================================== */
/* DESKTOP VIEW LAYOUT (1024px and Above)     */
/* ========================================== */
@media (min-width: 1024px) {
    .mainPage_leftHamburger,
    .mainPage_rightHamburger,
    .mainPage_bottomMenu,
    .mainPage_leftHamburgerMenu,
    .mainPage_rightHamburgerMenu {
        display: none !important;
    }
    
    .mainPage_topMenu {
        display: flex;
        flex-direction: row;
        gap: 8px;
    }
}

/* ========================================== */
/* MOBILE VIEW LAYOUT (Under 1024px)          */
/* ========================================== */
@media (max-width: 1023px) {
    .mainPage_leftMenu,
    .mainPage_rightMenu,
    .mainPage_topMenu {
        display: none !important;
    }

    .mainPage_leftHamburger,
    .mainPage_rightHamburger {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        z-index:10001;
    }

    .mainPage_bottomMenu {
        display: flex;
        flex-direction: row;
        justify-content: space-around;
        align-items: center;
        height: 50px;
        background-color: #eaeaea;
        padding: 4px;
        gap: 4px;
    }

    .mainPage_bottomMenu .mainPage_menuItem {
        padding: 0;
        height: 100%;
        flex: 1;
        text-align: center;
        border-radius: 4px;
        z-index:10001;
    }
}