/* =====================================================
   layout.css — Admin Panel Layout
   ===================================================== */

/* ─── Login ─── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: var(--space-4);
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-10) var(--space-8);
}

.login-logo {
  text-align: center;
  margin-bottom: var(--space-8);
}

.login-logo-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-3);
  color: #fff;
}

.login-logo h1 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.login-logo p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ─── Error Page ─── */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: var(--space-4);
}

.error-card {
  text-align: center;
  max-width: 420px;
}

.error-code {
  font-size: 72px;
  font-weight: var(--font-weight-extrabold, 800);
  line-height: 1;
  color: var(--color-border-strong);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--space-4);
}

.error-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.error-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  word-break: keep-all;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
}

/* ─── Admin Layout Root ─── */
.admin-layout {
  display: flex;
  min-height: 100vh;
  background: var(--color-bg);
}

/* ─── Sidebar ─── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  overflow: hidden;
  transition: transform var(--transition-slow), width var(--transition-slow);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed);
}

/* Brand */
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-4);
  height: var(--header-height);
  border-bottom: 1px solid var(--sidebar-border);
  flex-shrink: 0;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-brand-icon {
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.sidebar-brand-text {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  transition: opacity var(--transition-slow);
  white-space: nowrap;
}

.sidebar.collapsed .sidebar-brand-text { opacity: 0; pointer-events: none; }

/* Nav */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-3) 0;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }

.nav-item { position: relative; }

/* Nav Link base */
.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-5);
  color: var(--sidebar-text);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  min-height: 40px;
  border: none;
  background: none;
  width: 100%;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast);
  font-family: var(--font-family);
  border-radius: 0;
}

.nav-link:hover {
  background: var(--sidebar-hover-bg);
  color: var(--sidebar-hover-text);
}

.nav-link.active {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
  font-weight: var(--font-weight-semibold);
}

.nav-link-icon {
  width: 20px;
  min-width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: inherit;
}

.nav-link-text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity var(--transition-slow);
  text-align: left;
}

.sidebar.collapsed .nav-link-text { display: none; }

/* ─── 사이드바 접힘: 검색/탭/즐겨찾기·서브메뉴 숨기고 아이콘만 가운데 ─── */
.sidebar.collapsed .sidebar-search,
.sidebar.collapsed .sidebar-tabs { display: none; }
.sidebar.collapsed .sidebar-panel[data-panel="all"] { display: block !important; }
.sidebar.collapsed .sidebar-panel[data-panel="mymenu"] { display: none !important; }
.sidebar.collapsed .nav-sub { display: none; }
.sidebar.collapsed .nav-link { justify-content: center; gap: 0; padding-left: 0; padding-right: 0; }

.nav-link-arrow {
  width: 14px;
  min-width: 14px;
  height: 14px;
  color: var(--sidebar-text-muted);
  transition: transform var(--transition-base), opacity var(--transition-slow);
}

.sidebar.collapsed .nav-link-arrow { display: none; }

.nav-group-toggle[aria-expanded="true"] .nav-link-arrow,
.nav-group-toggle.open .nav-link-arrow {
  transform: rotate(90deg);
}

/* Sub menu */
.nav-sub {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--transition-slow);
  background: rgba(0,0,0,0.015);
}

.nav-sub.open { max-height: 400px; }

.nav-sub-link {
  padding-left: calc(var(--space-5) + 20px + var(--space-3));
  min-height: 36px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  position: relative;
}

.nav-sub-link.active {
  font-weight: var(--font-weight-semibold);
  color: var(--sidebar-active-text);
  background: var(--sidebar-active-bg);
}

.nav-sub-dot {
  width: 5px;
  height: 5px;
  min-width: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.3;
  margin-right: var(--space-2);
  transition: opacity var(--transition-fast);
}

.nav-sub-link.active .nav-sub-dot,
.nav-sub-link:hover .nav-sub-dot { opacity: 0.8; }

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-4) var(--space-4);
  border-top: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  overflow: hidden;
  white-space: nowrap;
}

.sidebar-avatar {
  width: 34px;
  height: 34px;
  min-width: 34px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
  transition: opacity var(--transition-slow);
}

.sidebar.collapsed .sidebar-user-info { opacity: 0; }

.sidebar-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: var(--font-size-xs);
  color: var(--sidebar-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: var(--radius-base);
  color: var(--sidebar-text-muted);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar-logout:hover {
  background: var(--color-danger-pale);
  color: var(--color-danger);
}

/* ─── Sidebar Overlay (Mobile) ─── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: calc(var(--z-sidebar) - 1);
}

.sidebar-overlay.active { display: block; }

/* ─── Main Wrapper ─── */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-width: 0;
  transition: margin-left var(--transition-slow);
}

.sidebar.collapsed ~ .main-wrapper {
  margin-left: var(--sidebar-collapsed);
}

/* ─── Header ─── */
.header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  z-index: var(--z-header);
  box-shadow: var(--shadow-xs);
  transition: left var(--transition-slow);
}

.sidebar.collapsed ~ .main-wrapper .header {
  left: var(--sidebar-collapsed);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  min-width: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.btn-sidebar-toggle {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.btn-sidebar-toggle:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  overflow: hidden;
}

.breadcrumb-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover { color: var(--color-primary); }

.breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  padding: 0 var(--space-1);
  color: var(--color-text-muted);
}

.breadcrumb-item.active {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Header User */
.header-user {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: background 0.12s ease;
}
.header-user:hover { background: var(--color-bg-secondary); }
.header-user.open { background: var(--color-bg-secondary); }

/* 역할 전환 캐럿(chevron) — 기본 아래 방향, 열림 시 뒤집기 */
.header-user-caret {
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
  transform: rotate(90deg);
  transition: transform 0.15s ease;
}
.header-user.open .header-user-caret { transform: rotate(-90deg); }

/* 역할 전환 드롭다운 */
.header-role-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 190px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.08);
  padding: var(--space-1);
  z-index: 80;
}
.header-role-menu[hidden] { display: none; }
.role-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 0;
  border-radius: var(--radius-base);
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-align: left;
}
.role-menu-item:hover { background: var(--color-bg-secondary); }
.role-menu-item.active { font-weight: var(--font-weight-semibold); }
.role-menu-check { width: 14px; flex-shrink: 0; color: var(--color-primary); }
.role-menu-name { flex: 1; }
.role-menu-empty { padding: var(--space-3); color: var(--color-text-muted); font-size: var(--font-size-sm); }

.header-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
}

.header-user-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.header-user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  line-height: 1.2;
}

.header-user-role {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.2;
}

.header-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  margin: 0 var(--space-1);
}

/* ─── P1: 세션 타이머 · 즐겨찾기 별 ─── */
.header-session { display: flex; align-items: center; gap: var(--space-2); }
.header-session-time {
  font-size: var(--font-size-xs); color: var(--color-text-secondary);
  font-variant-numeric: tabular-nums; white-space: nowrap;
}
.fav-star {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 34px;
  border: none; background: transparent; cursor: pointer;
  font-size: 17px; line-height: 1; color: var(--color-border-strong);
  padding: 0; transition: color var(--transition-fast); flex-shrink: 0;
}
.fav-star:hover { color: var(--color-star); }
.fav-star.is-fav { color: var(--color-star); }

/* ─── P1: 사이드바 검색 · 전체메뉴/My menu 탭 ─── */
.sidebar-search { padding: var(--space-3) var(--space-4) 0; }
.sidebar-search-input {
  width: 100%; padding: 6px 10px; font-size: var(--font-size-sm);
  border: 1px solid var(--color-border); border-radius: var(--radius-base);
  background: var(--color-bg); color: var(--color-text);
}
.sidebar-search-input:focus { outline: none; border-color: var(--color-border-strong); background: var(--color-surface); }
.sidebar-tabs { display: flex; padding: var(--space-3) var(--space-4) 0; border-bottom: 1px solid var(--sidebar-border); }
.sidebar-tab {
  flex: 1; border: none; background: transparent; padding: 8px 0;
  font-size: var(--font-size-sm); color: var(--sidebar-text-muted); cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.sidebar-tab.active { color: var(--color-text); font-weight: var(--font-weight-semibold); border-bottom-color: var(--color-primary); }
.sidebar-panel { flex: 1; overflow-y: auto; min-height: 0; }
.mymenu-empty { padding: var(--space-8) var(--space-4); text-align: center; color: var(--sidebar-text-muted); font-size: var(--font-size-xs); line-height: 1.7; }
#myMenuList .nav-link { display: flex; align-items: center; }
#myMenuList .nav-link-icon { color: var(--color-star); }
.mymenu-del { margin-left: auto; border: none; background: transparent; color: var(--sidebar-text-muted); cursor: pointer; font-size: 16px; line-height: 1; }
.mymenu-del:hover { color: var(--color-danger); }

/* ─── P1: 하단 상태바 ─── */
.app-statusbar {
  display: flex; align-items: center; gap: var(--space-3);
  padding: 6px var(--space-6); border-top: 1px solid var(--color-border);
  background: var(--color-surface); font-size: var(--font-size-xs); color: var(--color-text-muted);
}
.app-statusbar b { color: var(--color-text-secondary); font-weight: var(--font-weight-medium); }
.app-statusbar-sep { color: var(--color-border-strong); }
.app-statusbar-spacer { flex: 1; }

/* ─── Main Content ─── */
.main-content {
  flex: 1;
  margin-top: var(--header-height);
  padding: var(--space-6);
  min-width: 0;
  position: relative;   /* 페이지 스켈레톤 오버레이 기준 */
}

/* Page Header */
.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.page-header > div:first-child {
  min-width: 0;
}

.page-header-info {}

.page-title,
.page-header h1,
.page-header h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  margin: 0;
}

.page-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* 콘텐츠 내 브레드크럼 — 타이틀 아래 작은 경로 표시 (절제) */
.page-header .breadcrumb {
  margin-top: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  gap: var(--space-1);
}
.page-header .breadcrumb a { color: var(--color-text-secondary); text-decoration: none; }
.page-header .breadcrumb a:hover { color: var(--color-text); }

.page-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Content grid */
.content-grid {
  display: grid;
  gap: var(--space-6);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* ─── Responsive ─── */
/* 오프캔버스(햄버거 슬라이드) 사이드바는 모바일(≤640)에서만.
   태블릿(641~1024)은 데스크톱처럼 아이콘 레일로 축소된다. */
@media (max-width: 640px) {
  .sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-width) !important;
  }

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

  .main-wrapper {
    margin-left: 0 !important;
  }

  .header {
    left: 0 !important;
  }
}

@media (max-width: 640px) {
  .main-content {
    padding: var(--space-4);
  }

  .page-header {
    flex-direction: column;
    gap: var(--space-3);
  }

  .page-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ─── 모바일 전용: 헤더의 사용자/세션/로그아웃을 사이드바 하단 '세션관리' 섹션으로 ─── */
.sidebar-mobile-user { display: none; }
/* 세션관리 라벨 섹션(위아래 구분선) */
.smu-head {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-2);
  padding: var(--space-2) 0;
  border-top: 1px solid var(--sidebar-border);
  border-bottom: 1px solid var(--sidebar-border);
}
.smu-head-title { font-size: var(--font-size-sm); font-weight: var(--font-weight-bold); color: var(--sidebar-text); }
.smu-session { display: flex; align-items: center; gap: var(--space-2); }
.smu-timer { font-size: var(--font-size-xs); color: var(--sidebar-text-muted); font-variant-numeric: tabular-nums; }
/* 사용자블록 + 로그아웃 한 줄 */
.smu-body {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-2);
  padding-top: var(--space-3);
}
.smu-user { display: flex; align-items: center; gap: var(--space-2); min-width: 0; }
.smu-user .header-avatar { display: none; }   /* 모바일 사용자영역: 아이콘 미표시 */
.smu-info { min-width: 0; }
.smu-name { font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold); color: var(--sidebar-text); }
.smu-role { font-size: var(--font-size-xs); color: var(--sidebar-text-muted); }
.smu-logout { flex-shrink: 0; }

@media (max-width: 640px) {
  .header-right { display: none; }
  .sidebar-mobile-user {
    display: block; margin-top: auto; flex-shrink: 0;
    padding: var(--space-3) var(--space-4) var(--space-4);
  }
}

/* 서브메뉴 초기 열림은 애니메이션 없이(페이지 이동마다 펼침 애니메이션 방지) */
.nav-sub.no-anim { transition: none !important; }