/* ================================
   App Container (9:16 Portrait)
   ================================ */

#app-container {
    position: absolute;
    width: 1080px;
    height: 1920px;
    top: 50%;
    left: 50%;
    transform-origin: center center;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ================================
   Main UI Container (Fullscreen)
   ================================ */

.main-ui-container {
    width: 100%;
    height: 100%;
    background: #ecf0f1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    z-index: 10;
}

/* ================================
   Global Header
   ================================ */

#global-header {
    width: 100%;
    height: 120px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-shrink: 0;
    z-index: 100;
    position: relative;
    padding-top: 50px;
}

#global-header .btn {
    pointer-events: auto;
    margin: 0;
    flex-shrink: 0;
}

/* ================================
   Content Area
   ================================ */

#content-area {
    flex: 1;
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}