/* The desktop menu has its own space; mobile navigation stays within reach. */
:root {
    --navigation-width: 280px;
    --mobile-navigation-height: 136px;
}

.navigation-drawer {
    left: 0;
    width: var(--navigation-width);
    border-right: 1px solid #344457;
    box-shadow: none;
    transition: transform .2s ease, width .2s ease, visibility .2s;
    overscroll-behavior: contain;
}

.light-mode .navigation-drawer { border-color: var(--day-border); }
.main-content, .footer {
    margin-left: var(--navigation-width);
    min-width: 0;
    transition: margin-left .2s ease, margin-right .2s ease;
}
.main-content > .container { width: 100%; }
.menu-label-short { display: none; }
.nav-icon, .nav-toggle-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.nav-icon { color: #45d6a5; }
.light-mode .nav-icon { color: #277251; }
.menu-button:focus-visible, .navigation-drawer .menu-item:focus-visible {
    outline: 2px solid #10b981;
    outline-offset: -3px;
}

/* User customization: Hidden navigation items */
[data-nav-item].nav-item-hidden {
    display: none !important;
}

/* Desktop drawer layout */
@media (min-width: 1024px) {
    .navigation-drawer {
        display: flex;
        flex-direction: column;
    }
    .drawer-menu {
        flex: 1 1 auto;
        overflow-y: auto;
        overflow-x: hidden;
    }
}

/* Collapsed state (standard or compact) */
.desktop-menu-collapsed .navigation-drawer {
    transform: translateX(-100%);
    visibility: hidden;
}
.desktop-menu-collapsed .main-content,
.desktop-menu-collapsed .footer {
    margin-left: 0;
}
.desktop-menu-collapsed .nav-toggle-icon {
    transform: rotate(180deg);
}

/* Compact Mode (Icon Rail - 76px) */
@media (min-width: 1024px) {
    html.desktop-menu-compact {
        --navigation-width: 76px;
    }

    .desktop-menu-compact .navigation-drawer .drawer-header {
        padding: 16px 8px;
    }

    .desktop-menu-compact .navigation-drawer .drawer-header h3,
    .desktop-menu-compact .navigation-drawer .drawer-header p {
        display: none;
    }

    .desktop-menu-compact .navigation-drawer .drawer-header .profile-image {
        width: 44px;
        height: 44px;
        margin: 0 auto;
        font-size: 1.1rem;
    }

    .desktop-menu-compact .navigation-drawer .menu-item {
        justify-content: center;
        padding: 14px 0;
        gap: 0;
        position: relative;
    }

    .desktop-menu-compact .navigation-drawer .menu-item > span,
    .desktop-menu-compact .navigation-drawer .menu-item > .menu-label-full,
    .desktop-menu-compact .navigation-drawer .menu-item > .menu-label-short {
        display: none;
    }

    .desktop-menu-compact .navigation-drawer .theme-switch-container {
        flex-direction: column;
        padding: 10px 4px;
        gap: 6px;
        align-items: center;
    }

    .desktop-menu-compact .navigation-drawer .theme-switch-container span {
        display: none;
    }

    .desktop-menu-compact .navigation-drawer .theme-switch-container .switch {
        margin: 0;
        transform: scale(0.75);
    }

    /* Floating Tooltip in Compact Mode */
    .desktop-menu-compact .navigation-drawer .menu-item::after {
        content: attr(data-tooltip);
        position: absolute;
        left: calc(100% + 12px);
        top: 50%;
        transform: translateY(-50%) scale(0.95);
        background: #0f172a;
        color: #f1f5f9;
        padding: 6px 12px;
        border-radius: 7px;
        font-size: 0.75rem;
        font-weight: 500;
        white-space: nowrap;
        pointer-events: none;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
        border: 1px solid #334155;
        z-index: 1002;
    }

    .desktop-menu-compact .navigation-drawer .menu-item:hover::after {
        opacity: 1;
        visibility: visible;
        transform: translateY(-50%) scale(1);
    }

    .light-mode.desktop-menu-compact .navigation-drawer .menu-item::after {
        background: #ffffff;
        color: #1e293b;
        border-color: #cbd5e1;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    }
}

/* Right-positioned side menu */
@media (min-width: 1024px) {
    html.menu-position-right .navigation-drawer {
        left: auto;
        right: 0;
        border-right: none;
        border-left: 1px solid #344457;
    }

    html.menu-position-right.light-mode .navigation-drawer {
        border-color: var(--day-border);
    }

    html.menu-position-right .main-content,
    html.menu-position-right .footer {
        margin-left: 0;
        margin-right: var(--navigation-width);
    }

    html.menu-position-right.desktop-menu-collapsed .navigation-drawer {
        transform: translateX(100%);
        visibility: hidden;
    }

    html.menu-position-right.desktop-menu-collapsed .main-content,
    html.menu-position-right.desktop-menu-collapsed .footer {
        margin-right: 0;
    }

    html.menu-position-right .desktop-menu-collapsed .nav-toggle-icon {
        transform: rotate(0deg);
    }

    html.menu-position-right:not(.desktop-menu-collapsed) .nav-toggle-icon {
        transform: rotate(180deg);
    }

    /* Tooltip placed to the left in right-positioned compact menu */
    html.desktop-menu-compact.menu-position-right .navigation-drawer .menu-item::after {
        left: auto;
        right: calc(100% + 12px);
    }
}

/* Quick toggle / action button at bottom of drawer */
.drawer-footer-actions {
    margin-top: auto;
    padding: 14px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.light-mode .drawer-footer-actions {
    border-top-color: var(--day-border);
}

.drawer-action-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 9px;
    border: 1px solid #344457;
    background: rgba(255, 255, 255, 0.04);
    color: inherit;
    cursor: pointer;
    font-size: 0.825rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.drawer-action-btn:hover {
    background: rgba(16, 185, 129, 0.12);
    border-color: #10b981;
    color: #10b981;
}

.drawer-action-btn svg {
    transition: transform 0.25s ease;
}

.light-mode .drawer-action-btn {
    border-color: var(--day-border);
    background: var(--day-surface);
}

.light-mode .drawer-action-btn:hover {
    background: rgba(16, 185, 129, 0.12);
    border-color: #10b981;
}

.desktop-menu-compact .drawer-footer-actions {
    padding: 12px 6px;
}

.desktop-menu-compact .drawer-action-btn {
    justify-content: center;
    padding: 9px 0;
}

.desktop-menu-compact .drawer-action-btn .drawer-action-text {
    display: none;
}

.desktop-menu-compact .drawer-action-btn svg {
    transform: rotate(180deg);
}

/* Match the editor's available width after the sidebar takes its space */
@media (min-width: 1024px) and (max-width: 1220px) {
    html:not(.desktop-menu-collapsed):not(.desktop-menu-compact) .editor-layout {
        grid-template-columns: minmax(0, 1fr);
    }
    html:not(.desktop-menu-collapsed):not(.desktop-menu-compact) .editor-sidebar {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }
}

@media (max-width: 1023px) {
    html { scroll-padding-bottom: calc(var(--mobile-navigation-height) + env(safe-area-inset-bottom, 0px) + 16px); }
    body { padding-bottom: calc(var(--mobile-navigation-height) + env(safe-area-inset-bottom, 0px)); }
    .main-content, .footer { margin-left: 0 !important; margin-right: 0 !important; }
    .navigation-drawer, .desktop-menu-collapsed .navigation-drawer {
        top: auto;
        bottom: 0;
        left: 0;
        right: auto;
        width: 100%;
        height: calc(var(--mobile-navigation-height) + env(safe-area-inset-bottom, 0px));
        padding: 6px 8px calc(6px + env(safe-area-inset-bottom, 0px));
        border: 0;
        border-top: 1px solid #344457;
        box-shadow: 0 -6px 24px #00000016;
        transform: none;
        visibility: visible;
        transition: none;
    }
    .navigation-drawer .drawer-header,
    .navigation-drawer .theme-switch-container,
    .drawer-footer-actions,
    .menu-button,
    .menu-label-full { display: none !important; }
    .menu-label-short { display: inline; }
    .navigation-drawer .drawer-menu {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
        grid-auto-rows: minmax(58px, 1fr);
        gap: 4px;
        height: 100%;
        padding: 0;
        overflow: hidden;
    }
    .navigation-drawer .menu-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        padding: 6px 2px;
        min-width: 0;
        margin: 0;
        border: 1px solid transparent;
        border-radius: 10px;
        font-size: 0.6875rem;
        line-height: 1.25;
        text-align: center;
        overflow-wrap: anywhere;
    }
    .navigation-drawer .menu-item[aria-current="page"] { border: 1px solid #32876b; border-radius: 10px; }
    .light-mode .navigation-drawer .menu-item[aria-current="page"] { border-color: #88ad94; }
    .navigation-drawer .nav-icon { width: 22px; height: 22px; margin: 0; }
    .navigation-drawer a[href="?page=home"] { order: 1; }
    .navigation-drawer a[href="?page=code-editor"] { order: 2; }
    .navigation-drawer a[href="?page=solutions"] { order: 3; }
    .navigation-drawer a[href="?page=sample-problems"] { order: 4; }
    .navigation-drawer a[href="?page=profile"] { order: 5; }
    .navigation-drawer a[href="?page=contact"] { order: 6; }
    .navigation-drawer a[href="?page=settings"] { order: 7; }
    .navigation-drawer a[href="?page=login"] { order: 8; }
    .toolbar { gap: 8px; padding: 12px 16px; }
    .toolbar .logo-container { gap: 4px; }
    .toolbar .toolbar-actions { gap: 4px; }
    .toast { bottom: calc(var(--mobile-navigation-height) + env(safe-area-inset-bottom, 0px) + 16px); }
}

@media (max-width: 420px) {
    .toolbar .toolbar-title { font-size: 1.1rem; }
    .toolbar .toolbar-mark { width: 30px; font-size: .9rem; }
    .toolbar .account-toolbar-link { padding: 6px; }
}

@media (prefers-reduced-motion: reduce) {
    .navigation-drawer, .drawer-action-btn svg, .main-content, .footer { transition: none; }
}

@media print {
    .navigation-drawer, .menu-button { display: none; }
    .main-content, .footer { margin-left: 0; margin-right: 0; }
    body { padding-bottom: 0; }
}

html.menu-hidden .navigation-drawer, html.menu-hidden .drawer-overlay{display:none !important;} html.menu-hidden .main-content{margin-left:0 !important;}

.drag-handle{cursor:grab;margin-right:6px;opacity:.6;} .menu-item.dragging{opacity:.5;}