/* --- Mobile Overlay & Panes --- */

/* 2. Mobile Nav Menu Logic (Top-Down) */
@media (max-width: 1280px) {
    .nav-right-group {
        position: fixed;
        top: 70px;
        /* Aligned below the sticky navbar */
        left: 0;
        width: 100%;
        background: #262626;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        transform: translateY(-150%);
        /* Start hidden above screen */
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 90;
    }

    .nav-right-group.active {
        transform: translateY(0);
        /* Slide down into view */
    }

    .nav-links {
        flex-direction: column;
        gap: 1.5rem;
        width: 100%;
        align-items: center;
    }

    .calc-section {
        text-align: left;
        padding-left: 2rem;
    }
}

/* 4. Icon Button Styles for the Navbar */
.mobile-toggles {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 2rem;
    margin-bottom: 2rem;
}

@media (min-width: 1280px) {
    .mobile-toggles {
        display: none;
    }
}

.icon-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background 0.2s;
}

.icon-btn:active {
    background: rgba(255, 255, 255, 0.15);
}



@media (max-width: 1280px) {
    .layout-grid {
        flex-direction: column;
        justify-content: center;
    }

    .skinny-billboard {
        height: 50px;
    }

    .sidebar-controls-wrapper-mobile {
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        align-items: center;
        padding-right: 2rem;
        padding-left: 2rem;
    }

    .sidebar-controls-wrapper {
        display: none;
    }

    .alphabet-nav-mobile {
        flex-direction: row;
        height: auto;
        min-height: 30px;
        width: auto;
        flex-wrap: wrap;
        max-width: 100%;
        overflow-y: scroll;
        border-radius: 15px;
        margin-top: 0.5rem;
    }

    .alphabet-nav-mobile-container {
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
    }

}




/* Base state for Overlay to ensure it clears */
.pane-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s;
}

.pane-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}