/* ============================================================
   MOBILE NAVIGATION - WEB VERSION STYLE ACCORDION
   ============================================================ */

@media screen and (max-width: 76.24em) {
  /* ========== HIDE HERO ON MOBILE ========== */
  .portal-hero {
    display: none !important;
  }

  /* ========== PAGE HEADER REFINEMENT ========== */
  .md-header__inner {
    display: flex !important;
    align-items: center !important;
    padding: 0 4px !important;
    height: 48px !important;
  }

  /* ========== DRAWER CORE ========== */
  .md-sidebar--primary {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background-color: var(--md-default-bg-color) !important;
    z-index: 9999 !important;
    display: none !important;
    transform: none !important;
    transition: none !important;
    padding: 0 !important;
  }

  #__drawer:checked ~ .md-container .md-sidebar--primary {
    display: flex !important;
    flex-direction: column !important;
  }

  .md-sidebar--primary .md-sidebar__scrollwrap {
    display: none !important;
  }

  /* ========== NAV CONTAINER ========== */
  .openai-nav {
    display: flex;
    flex-direction: column;
    height: 100%;
    color: var(--md-default-fg-color);
    overflow: hidden;
  }

  /* ========== HEADER - IDENTICAL TO PAGE ========== */
  .openai-header {
    flex-shrink: 0;
    background-color: var(--md-default-bg-color);
    border-bottom: 1px solid var(--md-default-fg-color--lightest);
  }

  .openai-header .md-header__inner {
    width: 100%;
  }

  /* Ensure logo and text positions are identical */
  .openai-header .md-logo {
    margin-right: 10px !important;
    width: auto !important;
  }

  .openai-header .md-header__topic {
    font-size: 1.125rem !important;
    font-weight: 700 !important;
    color: var(--md-default-fg-color) !important;
  }

  /* Close Button (Replaces Hamburger) */
  .openai-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: none;
    background: transparent;
    color: var(--md-default-fg-color);
    cursor: pointer;
    order: 99 !important;
    margin-left: auto !important;
    opacity: 0.7;
    transition: opacity 250ms;
  }

  .openai-close:hover {
    opacity: 1;
  }

  /* ========== TABS ========== */
  .openai-tabs {
    display: flex;
    margin: 0.75rem;
    padding: 0.25rem;
    background-color: var(--md-default-fg-color--lightest);
    border-radius: 0.5rem;
    flex-shrink: 0;
  }

  .openai-tab {
    flex: 1;
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--md-default-fg-color--light);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 0.375rem;
    transition: all 150ms;
  }

  .openai-tab--active {
    background-color: var(--md-default-bg-color);
    color: var(--md-default-fg-color);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  }

  /* ========== SEARCH BAR ========== */
  .openai-search {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0 0.75rem 0.75rem;
    padding: 0.625rem 0.75rem;
    background-color: var(--md-default-fg-color--lightest);
    border-radius: 0.375rem;
    color: var(--md-default-fg-color--light);
    cursor: pointer;
    flex-shrink: 0;
    font-size: 0.875rem;
  }

  /* ========== ACCORDION NAVIGATION - WEB VERSION STYLE ========== */
  .openai-content {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 1rem 1rem;
  }

  /* Top-level accordion nav */
  .accordion-nav {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  /* Accordion item */
  .accordion-item {
    margin: 0;
    padding: 0;
  }

  /* ========== SECTION HEADERS (expandable with children) ========== */
  .accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 0.5rem;
    border: none;
    background: transparent;
    color: var(--md-default-fg-color);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    border-radius: 0.375rem;
    transition: background-color 150ms, color 150ms;
    position: relative;
  }

  .accordion-header:hover {
    background-color: var(--md-default-fg-color--lightest);
  }

  /* Expanded header - purple color like web version */
  .accordion-header--expanded {
    color: var(--md-accent-fg-color);
  }

  .accordion-title {
    flex: 1;
  }

  /* Chevron icon */
  .accordion-chevron {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    opacity: 0.5;
    transition: transform 200ms ease, opacity 200ms;
  }

  .accordion-chevron svg {
    width: 20px;
    height: 20px;
  }

  /* Rotate chevron down when expanded */
  .accordion-header--expanded .accordion-chevron {
    transform: rotate(90deg);
    opacity: 0.8;
  }

  /* ========== ACCORDION LINKS (regular nav items) ========== */
  .accordion-link {
    display: block;
    padding: 0.625rem 0.5rem;
    color: var(--md-default-fg-color--light);
    font-size: 0.9375rem;
    font-weight: 400;
    text-decoration: none;
    border-radius: 0.375rem;
    transition: background-color 150ms, color 150ms;
    position: relative;
  }

  .accordion-link:hover {
    background-color: var(--md-default-fg-color--lightest);
    color: var(--md-default-fg-color);
  }

  /* Active link - purple with left border accent */
  .accordion-link--active {
    color: var(--md-accent-fg-color);
    font-weight: 500;
    padding-left: calc(0.5rem + 4px);
  }

  .accordion-link--active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 3px;
    background-color: var(--md-accent-fg-color);
    border-radius: 2px;
  }

  /* ========== SUB-NAVIGATION (nested children) ========== */
  .accordion-subnav {
    margin: 0;
    padding: 0 0 0.25rem 0;
    list-style: none;
  }

  /* Child items get indent and left border */
  .accordion-item--child {
    margin-left: 0.75rem;
    padding-left: 0.75rem;
    border-left: 2px solid var(--md-default-fg-color--lightest);
  }

  .accordion-item--child .accordion-link {
    font-size: 0.875rem;
    padding: 0.5rem 0.5rem;
    color: var(--md-default-fg-color--light);
  }

  .accordion-item--child .accordion-link:hover {
    color: var(--md-default-fg-color);
  }

  .accordion-item--child .accordion-link--active {
    color: var(--md-accent-fg-color);
    font-weight: 500;
    padding-left: calc(0.5rem + 4px);
  }

  .accordion-item--child .accordion-link--active::before {
    left: -0.75rem;
    top: 50%;
    bottom: auto;
    width: 2px;
    height: 16px;
    transform: translateY(-50%);
    background-color: var(--md-accent-fg-color);
  }

  /* Nested child headers (sub-sections) */
  .accordion-item--child .accordion-header {
    font-size: 0.875rem;
    padding: 0.5rem 0.5rem;
    font-weight: 500;
  }

  /* Deep nested items */
  .accordion-item--child .accordion-subnav {
    padding-left: 0;
  }

  .accordion-item--child .accordion-item--child {
    margin-left: 0.5rem;
    padding-left: 0.5rem;
  }

  .accordion-item--child .accordion-item--child .accordion-link {
    font-size: 0.8125rem;
    padding: 0.375rem 0.5rem;
  }

  /* ========== FOOTER ========== */
  .openai-footer {
    padding: 1rem 0.75rem;
    border-top: 1px solid var(--md-default-fg-color--lightest);
    flex-shrink: 0;
  }

  .openai-footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
  }

  .openai-footer-link {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--md-default-fg-color--light);
    font-size: 0.8125rem;
    text-decoration: none;
  }

  .openai-footer-buttons {
    display: flex;
    gap: 0.5rem;
  }

  .openai-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem;
    font-size: 0.8125rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all 150ms;
  }

  .openai-btn--secondary {
    background-color: var(--md-default-fg-color--lightest);
    color: var(--md-default-fg-color);
  }

  .openai-btn--primary {
    background-color: var(--md-primary-fg-color);
    color: var(--md-primary-bg-color);
  }

  /* Hamburger visibility on header */
  .md-header__button.md-icon[for="__drawer"],
  .tx-hamburger-right {
    display: flex !important;
    order: 99 !important;
    margin-left: auto !important;
  }
}