/* ======================================================
   MOBILE & RESPONSIVE DESIGN
   ====================================================== */

@media (max-width: 768px) {

    /* Sidebar: Hide by default, slide over when toggled */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 10px 0 20px rgba(0, 0, 0, 0.5);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    /* Main Layout: Column Mode */
    .main {
        overflow-y: auto;
        /* Allow full page scrolling */
        -webkit-overflow-scrolling: touch;
    }

    .container {
        flex-direction: column;
        height: auto;
        /* Let content dictate height */
        flex: 0 0 auto;
    }

    /* Hide standard resizers on mobile to simplify */
    .resizer,
    .resizer-h {
        display: none !important;
    }

    /* Header: Adjust spacing */
    .header {
        padding: 12px 16px;
    }

    .header h2 {
        font-size: 16px;
        max-width: 60vw;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* Problem Panel */
    .problem-panel {
        width: 100%;
        height: auto;
        max-height: 35vh;
        /* Reduce slightly to show editor teaser */
        padding: 20px;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    /* Editor Panel */
    .editor-panel {
        width: 100%;
        height: 50vh;
        /* Fixed reasonable height */
    }

    /* Output Panel */
    .output-panel {
        height: auto;
        min-height: 250px;
        border-top: 1px solid var(--border);
        flex: 0 0 auto;
    }

    /* Dashboard: Single Column */
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .day-row {
        grid-template-columns: 1fr 1fr;
        /* Stack visuals differently if needed or squeeze */
    }

    /* Hamburger Menu Button (Only visible on mobile) */
    .menu-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 24px;
        padding: 0;
        margin-right: 12px;
        box-shadow: none;
    }

    /* Topbar */
    .topbar {
        padding: 0 16px;
    }

    .logo {
        display: none;
        /* Hide logo in editor view to save space, show burger */
    }
}

/* Hide toggle on desktop */
.menu-toggle {
    display: none;
}