/* =========================================================
 * /assets/css/mobile_nav.css  (PATCH FINAL for your header.php)
 * - Uses existing markup:
 *   .main-nav, .nav-overlay[data-nav-overlay], .nav-close[data-nav-close]
 *   .t-rail, .m-tabbar, [data-nav-toggle]
 * - State: body.nav-open
 * ========================================================= */

/* 기본: 모바일/태블릿에서만 동작 */
@media (max-width: 980px){

  :root{
    --mn-safe-b: env(safe-area-inset-bottom);
    --mn-safe-t: env(safe-area-inset-top);

    --mn-z-overlay: 6000;
    --mn-z-drawer: 6100;
    --mn-z-tab: 6200;

    --mn-drawer-w: min(360px, 88vw);

    --mn-bg: rgba(255,255,255,.96);
    --mn-border: rgba(15,23,42,.10);
    --mn-text: rgba(15,23,42,.78);
    --mn-muted: rgba(15,23,42,.55);
    --mn-accent: #2563eb;

    --mn-tab-h: 66px;
  }

  /* 하단 탭바 높이만큼 본문 가림 방지 */
  body{
    padding-bottom: calc(var(--mn-tab-h) + var(--mn-safe-b));
  }

  /* =======================================================
   * 1) Drawer = nav.main-nav 자체를 패널로 사용
   * ======================================================= */

  /* 기본 nav는 "오른쪽 슬라이드 패널" */
  .main-nav{
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;

    width: var(--mn-drawer-w);
    z-index: var(--mn-z-drawer);

    background: var(--mn-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    border-left: 1px solid var(--mn-border);
    box-shadow: -22px 0 60px rgba(0,0,0,.18);

    transform: translateX(110%);
    transition: transform .18s ease;

    /* 기존 PC nav 레이아웃 무력화 */
    padding: 0;
    margin: 0;
  }

  /* 열림 상태 */
  body.nav-open .main-nav{
    transform: translateX(0);
  }

  /* nav-inner는 패널 내부 레이아웃 */
  .main-nav .nav-inner{
    height: 100%;
    display:flex;
    flex-direction: column;
    padding-top: calc(12px + var(--mn-safe-t));
    padding-bottom: 16px;
  }

  /* 메뉴 UL 스크롤 */
  .main-nav .nav-menu{
    overflow:auto;
    padding: 12px 14px 18px;
    margin: 0;
  }

  /* 메뉴 항목 간격(너무 촘촘하면 여기 조절) */
  .main-nav .nav-item{ margin-bottom: 8px; }

  /* =======================================================
   * 2) Overlay (이미 존재: .nav-overlay[data-nav-overlay])
   * ======================================================= */
  .nav-overlay[data-nav-overlay]{
    position: fixed;
    inset: 0;
    z-index: var(--mn-z-overlay);
    background: rgba(2,6,23,.55);

    display:none;
  }
  body.nav-open .nav-overlay[data-nav-overlay]{
    display:block;
  }

  /* 오버레이 클릭 가능하게 */
  .nav-overlay[data-nav-overlay]{
    pointer-events: auto;
  }

  /* =======================================================
   * 3) Close button (X) - 우측 상단 고정 + 클릭 보장
   * ======================================================= */
  .nav-close[data-nav-close]{
    position: absolute;
    top: calc(10px + var(--mn-safe-t));
    right: 12px;

    width: 42px;
    height: 42px;
    border-radius: 999px;

    border: 1px solid rgba(15,23,42,.14);
    background: rgba(255,255,255,.92);
    color: rgba(15,23,42,.85);

    font-size: 24px;
    font-weight: 900;
    line-height: 1;

    display:flex;
    align-items:center;
    justify-content:center;

    cursor:pointer;
    z-index: calc(var(--mn-z-drawer) + 5);
    pointer-events: auto !important;
  }
  .nav-close[data-nav-close]:active{ transform: translateY(1px); }

  /* =======================================================
   * 4) Tablet side rail (t-rail) - 고정 UI
   * ======================================================= */
  .t-rail{
    position: fixed;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    z-index: var(--mn-z-tab);

    display:none; /* 기본 숨김: 태블릿에서만 켬 */
  }

  /* 태블릿 범위에서만 레일 표시 */
  @media (min-width: 641px) and (max-width: 980px){
    .t-rail{
      display:flex;
      flex-direction: column;
      gap: 10px;

      padding: 10px;
      border-radius: 16px;
      background: rgba(255,255,255,.85);
      border: 1px solid rgba(15,23,42,.10);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
    }

    .t-rail-item{
      display:flex;
      align-items:center;
      gap: 10px;

      padding: 10px 12px;
      border-radius: 14px;
      text-decoration:none;
      color: var(--mn-text);
      font-weight: 900;
      border: 1px solid rgba(15,23,42,.08);
      background: rgba(255,255,255,.90);
      cursor:pointer;
    }
    .t-rail-ico{ width: 20px; text-align:center; }
    .t-rail-txt{ font-size: 12px; }
  }

  /* =======================================================
   * 5) Mobile tab bar (m-tabbar) - 하단 고정 UI
   * ======================================================= */
  .m-tabbar{
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--mn-z-tab);

    height: var(--mn-tab-h);
    padding-bottom: var(--mn-safe-b);

    display:flex;
    justify-content: space-around;
    align-items: center;

    background: rgba(255,255,255,.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-top: 1px solid rgba(15,23,42,.10);
  }

  /* 모바일에서는 탭바 표시, 태블릿 레일은 위에서 처리 */
  @media (min-width: 641px) and (max-width: 980px){
    .m-tabbar{ display:none; }
  }

  .m-tab{
    flex:1;
    min-width:0;

    display:flex;
    flex-direction: column;
    align-items:center;
    justify-content:center;
    gap: 4px;

    padding: 6px 4px;
    text-decoration:none;

    color: var(--mn-muted);
    font-size: 11px;
    font-weight: 900;

    background: transparent;
    border:0;
    cursor:pointer;
  }

  .m-ico{
    width: 34px;
    height: 34px;
    border-radius: 999px;              /* ✅ 원형 */
    display:flex;
    align-items:center;
    justify-content:center;

    font-size: 18px;
    line-height: 1;

    background: rgba(15,23,42,.04);
    border: 1px solid rgba(15,23,42,.08);
  }

  .m-txt{ line-height: 1; }

  /* 더보기 버튼은 살짝 강조 */
  .m-tab--more .m-ico{
    background: rgba(37,99,235,.10);
    border-color: rgba(37,99,235,.18);
    color: var(--mn-accent);
  }

  /* =======================================================
   * 6) 옵션: 오늘(today) 같은 몰입형 페이지에서는 UI 숨기기
   * ======================================================= */
  .page-today .t-rail{ display:none !important; }
  /* today에서 하단탭 숨기려면 주석 해제 */
  /* .page-today .m-tabbar{ display:none !important; } */
}