discourse/app/assets/stylesheets/desktop/menu-panel.scss

.menu-panel {
  &.user-menu.revamped {
    width: unset;
  }

  &.drop-down {
    .panel-body {
      max-height: calc(100vh - var(--header-offset));
      max-width: calc(100vw - 2em);
    }
  }
}

// Sidebar-hamburger hybrid

.hamburger-panel .revamped {
  --d-sidebar-highlight-background: var(--d-hover);
  --d-sidebar-row-horizontal-padding: 0.5rem;
  --d-sidebar-row-height: 30px;
  // 1.25rem gets text left-aligned with the hamburger icon
  --d-sidebar-row-horizontal-padding: 0.66rem;
  width: 360px;

  .panel-body-content {
    width: 100%;
    min-width: 0; // prevent content blowing out width
  }

  .sidebar-section-wrapper {
    .sidebar-section-header-button {
      opacity: 1;
    }

    .sidebar-section-link.active {
      font-weight: normal;
      background: var(--d-hover);
    }

    .sidebar-section-header-wrapper .select-kit .btn:hover {
      background: transparent;
    }

    &.sidebar-section {
      padding-top: 0.5em;
      .sidebar-section-header-wrapper {
        margin: 0 0 0.5em;
        padding-bottom: 0.25em;
        .d-icon-globe {
          color: var(--primary-medium);
        }
      }
      ul {
        display: grid;
        grid-template-columns: 1fr 1fr;
        li {
          min-width: 0;
        }
      }
    }

    .sidebar-section-message {
      padding: 0;
    }
  }

  .sidebar-section-link-wrapper
    .sidebar-section-link-hover:hover
    .sidebar-section-hover-button {
    background: transparent;
  }

  .sidebar-footer-wrapper {
    padding: 0;
    margin-top: 1em;
    .sidebar-footer-container {
      padding: 0;
      border: none;
      background: var(--secondary);
      &:before {
        top: -1.5em;
        background: linear-gradient(
          to bottom,
          transparent,
          rgba(var(--secondary-rgb), 1)
        );
      }
    }
  }
}

.sidebar-hamburger-dropdown {
  .discourse-no-touch & {
    .sidebar-section-wrapper .sidebar-section-header-wrapper:hover,
    .sidebar-section-wrapper .sidebar-section-header-wrapper:focus-within {
      background: transparent;
    }
  }
}