/* ============================================================
   Lens Layouts — Shell, Grid, Responsive
   ============================================================ */

/* --- App shell -------------------------------------------- */
.lens-app {
  height: 100vh;
  overflow: hidden;
  background: var(--lens-color-bg-surface);
  display: grid;
  grid-template-columns: calc(var(--lens-layout-sidebar-width) + 20px) 1fr;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "topbar topbar"
    "sidebar main";
  transition: grid-template-columns var(--lens-motion-modal);
}
.lens-app--sidebar-collapsed {
  grid-template-columns: 0 1fr;
}
.lens-app--sidebar-collapsed .lens-app__sidebar {
  transform: translateX(-100%);
  pointer-events: none;
}

.lens-app__topbar { grid-area: topbar; }
.lens-app__sidebar {
  grid-area: sidebar;
  transition: transform var(--lens-motion-modal);
}
.lens-app__main {
  grid-area: main;
  min-width: 0;
  overflow-x: hidden;
  overflow-y: auto;
  background: var(--lens-color-bg-card);
  border: 1px solid var(--lens-color-border);
  border-radius: 15px;
  margin: 10px 10px 10px 0;
  box-shadow: var(--lens-shadow-sm);
}

/* --- TopBar ----------------------------------------------- */
.lens-topbar {
  height: var(--lens-layout-topbar-height);
  background: var(--lens-color-bg-card);
  border: 1px solid var(--lens-color-border);
  border-radius: 15px;
  margin: 10px 10px 0 10px;
  display: flex;
  align-items: center;
  padding: 0 var(--lens-space-lg);
  position: relative;
  z-index: var(--lens-z-topbar);
  gap: var(--lens-space-md);
  box-shadow: var(--lens-shadow-md);
}
.lens-topbar__logo {
  height: 32px;
  width: auto;
  margin-right: var(--lens-space-md);
}
.lens-topbar__brand {
  font-weight: 700;
  font-size: var(--lens-text-subhead);
  letter-spacing: -0.4px;
  color: var(--lens-color-brand);
  display: flex; align-items: center; gap: 8px;
}
.lens-topbar__brand-mark {
  width: 28px; height: 28px;
  background: var(--lens-color-brand);
  border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: var(--lens-text-caption);
  letter-spacing: 0;
}
.lens-topbar__tabs { position: absolute; left: 50%; transform: translateX(-50%); }
.lens-topbar #create-new-btn { margin-left: auto; }
.lens-topbar__search {
  flex: 1;
  max-width: 480px;
  margin: 0 auto;
}
.lens-search-pill {
  display: flex; align-items: center; gap: var(--lens-space-sm);
  height: 36px; padding: 0 12px;
  background: var(--lens-color-bg-surface);
  border: 1px solid var(--lens-color-border);
  border-radius: var(--lens-radius-pill);
  color: var(--lens-color-text-muted);
  font-size: var(--lens-text-caption);
  cursor: pointer;
  width: 100%;
  transition: all var(--lens-motion-hover);
}
.lens-search-pill:hover {
  background: var(--lens-color-bg-card);
  border-color: var(--lens-color-border-hover);
}
.lens-search-pill__shortcut {
  margin-left: auto;
  font-family: var(--lens-font-mono);
  font-size: var(--lens-text-label);
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--lens-color-bg-card);
  border: 1px solid var(--lens-color-border);
  color: var(--lens-color-text-secondary);
}

/* --- Sidebar ---------------------------------------------- */
.lens-sidebar {
  background: var(--lens-color-bg-card);
  border: 1px solid var(--lens-color-border);
  border-radius: 15px;
  margin: 10px;
  display: flex; flex-direction: column;
  z-index: var(--lens-z-sidebar);
  box-shadow: var(--lens-shadow-md);
  overflow: hidden;
}
.lens-sidebar__header {
  height: var(--lens-layout-topbar-height);
  display: flex; align-items: center;
  padding: 0 var(--lens-space-md);
  border-bottom: 1px solid var(--lens-color-border-subtle, var(--lens-color-border));
  gap: 8px;
  flex-shrink: 0;
}
.lens-sidebar__toolbar {
  display: flex; align-items: center;
  padding: var(--lens-space-sm) var(--lens-space-md);
  gap: var(--lens-space-sm);
  flex-shrink: 0;
}
.lens-sidebar__nav { flex: 1; overflow-y: auto; padding: 0 var(--lens-space-sm) var(--lens-space-md); }
.lens-sidebar__footer {
  padding: var(--lens-space-md);
  border-top: 1px solid var(--lens-color-border);
  display: flex; align-items: center; gap: var(--lens-space-sm);
}
.lens-sidebar__footer-name { font-size: var(--lens-text-body); font-weight: 600; }
.lens-sidebar__footer-role { font-size: var(--lens-text-caption); color: var(--lens-color-text-secondary); }

.lens-nav-section {
  margin-top: var(--lens-space-md);
}
.lens-nav-section__label {
  font-size: var(--lens-text-label);
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--lens-color-text-muted);
  padding: 8px var(--lens-space-sm);
}

.lens-nav-item {
  display: flex; align-items: center; gap: var(--lens-space-sm);
  padding: 8px var(--lens-space-sm);
  border-radius: var(--lens-radius-sm);
  font-size: var(--lens-text-body);
  color: var(--lens-color-text-primary);
  text-decoration: none;
  position: relative;
  transition: background var(--lens-motion-hover), color var(--lens-motion-hover);
  cursor: pointer;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: inherit;
}
.lens-nav-item:hover { background: var(--lens-color-bg-hover); text-decoration: none; }
.lens-nav-item--active {
  background: var(--lens-color-brand-tint);
  color: var(--lens-color-brand);
  font-weight: 600;
}
.lens-nav-item--active::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 6px; bottom: 6px;
  width: 3px;
  background: var(--lens-color-brand);
  border-radius: 0 2px 2px 0;
}
.lens-nav-item__icon { color: currentColor; flex-shrink: 0; }
.lens-nav-item__label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lens-nav-item__chevron {
  margin-left: auto; color: var(--lens-color-text-muted);
  transition: transform var(--lens-motion-accordion);
}
.lens-nav-item--expanded .lens-nav-item__chevron { transform: rotate(90deg); }

.lens-nav-children {
  padding-left: 16px;
  display: flex; flex-direction: column; gap: 1px;
}
.lens-nav-children .lens-nav-item { font-size: var(--lens-text-caption); padding: 7px var(--lens-space-sm); }

/* Third tier: reports nested under a dashboard. The nested
   .lens-nav-children stacks another 16px of indent (= 32px total),
   and report rows are visually quieter — they're leaves, not folders. */
.lens-nav-children .lens-nav-children {
  padding-left: 22px;
  position: relative;
  margin: 2px 0 4px;
}
.lens-nav-children .lens-nav-children::before {
  content: "";
  position: absolute;
  left: 10px; top: 4px; bottom: 4px;
  width: 1px;
  background: var(--lens-color-border);
}
.lens-nav-item--report {
  font-size: var(--lens-text-caption);
  color: var(--lens-color-text-secondary);
  padding: 5px var(--lens-space-sm) 5px 6px;
}
.lens-nav-item--report .lens-nav-item__icon { color: var(--lens-color-text-muted); }
.lens-nav-item--report.lens-nav-item--active { color: var(--lens-color-brand); }
.lens-nav-item--report.lens-nav-item--active .lens-nav-item__icon { color: var(--lens-color-brand); }

/* --- Breadcrumbs ----------------------------------------- */
.lens-breadcrumbs {
  height: var(--lens-layout-breadcrumb-height);
  padding: 4px var(--lens-space-lg);
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--lens-color-border);
  gap: var(--lens-space-md);
  padding: 23px 28px;
}
.lens-breadcrumbs__path {
  display: flex; align-items: center; gap: 6px;
  font-size: var(--lens-text-caption);
  color: var(--lens-color-text-secondary);
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.lens-breadcrumbs__path a { color: var(--lens-color-text-secondary); }
.lens-breadcrumbs__path a:hover { color: var(--lens-color-brand); }
.lens-breadcrumbs__path .lens-breadcrumb-current {
  color: var(--lens-color-text-primary);
  font-weight: 500;
}
.lens-breadcrumbs__path .lens-breadcrumb-sep { color: var(--lens-color-text-muted); }
.lens-breadcrumbs__path .lens-breadcrumb-ellipsis { color: var(--lens-color-text-muted); font-weight: 600; letter-spacing: 1px; }
.lens-breadcrumbs__actions { display: flex; align-items: center; gap: var(--lens-space-sm); }

/* --- Page padding / sections ----------------------------- */
.lens-page {
  padding: var(--lens-space-xl) var(--lens-layout-page-padding);
  max-width: var(--lens-layout-max-width);
  margin: 0 auto;
}
.lens-page__header {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: var(--lens-space-lg);
  gap: var(--lens-space-md);
  flex-wrap: wrap;
}
.lens-page__title { font-size: var(--lens-text-section); font-weight: 600; line-height: 1.20; margin-bottom: 6px; }
.lens-page__subtitle { font-size: var(--lens-text-body-lg); color: var(--lens-color-text-secondary); }

.lens-section {
  margin-top: var(--lens-space-lg);
}
.lens-section__head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--lens-space-md);
}
.lens-section__title { font-size: var(--lens-text-subhead); font-weight: 600; }

/* --- Grid ------------------------------------------------- */
.lens-grid {
  display: grid;
  gap: var(--lens-layout-grid-gap);
}
.lens-grid--kpi-4 { grid-template-columns: repeat(4, 1fr); }
.lens-grid--cards-4 { grid-template-columns: repeat(4, 1fr); }
.lens-grid--2 { grid-template-columns: repeat(2, 1fr); }
.lens-grid--3 { grid-template-columns: repeat(3, 1fr); }

/* --- Auth shell ------------------------------------------ */
.lens-auth {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: var(--lens-space-md);
  background: var(--lens-color-bg-page);
  position: relative;
  overflow: hidden;
}
.lens-auth__watermark {
  position: absolute;
  font-size: 360px;
  font-weight: 800;
  color: var(--lens-color-bg-surface);
  letter-spacing: -10px;
  user-select: none;
  pointer-events: none;
  white-space: nowrap;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  z-index: 0;
}
.lens-auth__card {
  max-width: 400px;
  width: 100%;
  background: var(--lens-color-bg-card);
  border: 1px solid var(--lens-color-border);
  border-radius: var(--lens-radius-lg);
  padding: 40px 32px;
  box-shadow: var(--lens-shadow-md);
  position: relative;
  z-index: 1;
}
.lens-auth__brand {
  display: flex; flex-direction: column; align-items: center; gap: 16px;
  margin-bottom: 28px;
}
.lens-auth__title { text-align: center; font-size: var(--lens-text-subhead-lg); font-weight: 600; margin-bottom: 6px; }
.lens-auth__sub { text-align: center; font-size: var(--lens-text-body); color: var(--lens-color-text-secondary); margin-bottom: 28px; }
.lens-auth__footer {
  text-align: center;
  margin-top: 24px;
  font-size: var(--lens-text-caption);
  color: var(--lens-color-text-muted);
}

/* --- Empty state ----------------------------------------- */
.lens-empty {
  text-align: center;
  padding: 80px var(--lens-space-md);
  max-width: 480px;
  margin: 0 auto;
}
.lens-empty__icon {
  width: 64px; height: 64px;
  margin: 0 auto var(--lens-space-md);
  color: var(--lens-color-text-muted);
  display: inline-flex; align-items: center; justify-content: center;
}
.lens-empty__icon--danger { color: var(--lens-color-danger); }
.lens-empty__icon--warning { color: var(--lens-color-warning); }
.lens-empty__title {
  font-size: var(--lens-text-subhead-lg);
  font-weight: 600;
  margin-bottom: var(--lens-space-sm);
}
.lens-empty__desc {
  font-size: var(--lens-text-body);
  color: var(--lens-color-text-secondary);
  margin-bottom: var(--lens-space-md);
  line-height: 1.6;
}
.lens-empty__actions { display: inline-flex; gap: var(--lens-space-sm); justify-content: center; flex-wrap: wrap; }

/* --- Filter slide-in panel ------------------------------ */
.lens-side-panel {
  position: fixed; top: 0; right: 0; bottom: 0;
  width: 380px;
  max-width: 100vw;
  background: var(--lens-color-bg-card);
  border-left: 1px solid var(--lens-color-border);
  box-shadow: var(--lens-shadow-lg);
  z-index: var(--lens-z-modal);
  display: flex; flex-direction: column;
}
.lens-side-panel__header {
  height: var(--lens-layout-topbar-height);
  border-bottom: 1px solid var(--lens-color-border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--lens-space-md);
}
.lens-side-panel__body { flex: 1; overflow-y: auto; padding: var(--lens-space-md); }
.lens-side-panel__footer {
  border-top: 1px solid var(--lens-color-border);
  padding: var(--lens-space-md);
  display: flex; gap: var(--lens-space-sm); align-items: center; justify-content: space-between;
  background: var(--lens-color-bg-surface);
}

/* --- User menu popover ----------------------------------- */
.lens-popover {
  background: var(--lens-color-bg-card);
  border: 1px solid var(--lens-color-border);
  border-radius: var(--lens-radius-md);
  box-shadow: var(--lens-shadow-lg);
  width: 280px;
  overflow: hidden;
}
.lens-popover__section { padding: 8px; }
.lens-popover__section + .lens-popover__section { border-top: 1px solid var(--lens-color-border); }
.lens-popover__head { padding: 16px; border-bottom: 1px solid var(--lens-color-border); }
.lens-popover__head-name { font-size: var(--lens-text-body); font-weight: 600; }
.lens-popover__head-meta { font-size: var(--lens-text-caption); color: var(--lens-color-text-secondary); margin-top: 2px; }


/* --- Sidebar expand tab (shown when collapsed) ----------- */
.lens-sidebar-expand {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 40px;
  background: var(--lens-color-bg-card);
  border: 1px solid var(--lens-color-border);
  border-left: none;
  border-radius: 0 8px 8px 0;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: var(--lens-z-sidebar);
  box-shadow: var(--lens-shadow-sm);
  color: var(--lens-color-text-muted);
  transition: color var(--lens-motion-hover), background var(--lens-motion-hover);
}
.lens-sidebar-expand:hover {
  background: var(--lens-color-brand-tint);
  color: var(--lens-color-brand);
}
.lens-app--sidebar-collapsed .lens-sidebar-expand {
  display: flex;
}

/* --- Topbar hamburger (mobile only) ---------------------- */
.lens-topbar__hamburger { display: none; }

/* --- Mobile sidebar backdrop ----------------------------- */
.lens-sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 23, 0.5);
  z-index: calc(var(--lens-z-sidebar) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--lens-motion-modal), visibility var(--lens-motion-modal);
}
.lens-sidebar-backdrop--visible {
  opacity: 1;
  visibility: visible;
}

/* --- Mobile responsive ----------------------------------- */
@media (max-width: 1023px) {
  :root {
    --lens-text-hero: 28px;
    --lens-text-section: 22px;
    --lens-text-subhead-lg: 18px;
    --lens-text-subhead: 15px;
    --lens-layout-page-padding: 24px;
  }
  .lens-grid--kpi-4 { grid-template-columns: repeat(2, 1fr); }
  .lens-grid--cards-4 { grid-template-columns: repeat(2, 1fr); }
  .lens-app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas: "topbar" "main";
  }
  .lens-topbar__hamburger { display: inline-flex; }
  .lens-topbar__logo { display: none; }
  .lens-app__main { margin: 0; }
  .lens-app__sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--lens-layout-sidebar-width);
    max-width: 85vw;
    margin: 0;
    border-radius: 0 15px 15px 0;
    transform: translateX(-100%);
    transition: transform var(--lens-motion-modal);
    z-index: var(--lens-z-sidebar);
    box-shadow: none;
    height: 100vh;
  }
  .lens-app__sidebar.lens-sidebar--mobile-open {
    transform: translateX(0);
    box-shadow: var(--lens-shadow-lg);
  }
  .lens-sidebar-expand { display: none; }
}
@media (max-width: 767px) {
  :root {
    --lens-text-hero: 24px;
    --lens-text-section: 20px;
    --lens-text-subhead-lg: 16px;
    --lens-text-subhead: 14px;
    --lens-text-body: 13px;
    --lens-text-caption: 12px;
    --lens-layout-page-padding: 16px;
    --lens-layout-topbar-height: 48px;
    --lens-layout-breadcrumb-height: 28px;
  }
  .lens-grid--kpi-4, .lens-grid--cards-4, .lens-grid--2, .lens-grid--3 {
    grid-template-columns: 1fr;
  }
  .lens-modal { max-height: 100vh; height: 100vh; max-width: 100%; border-radius: 0; }
  .lens-modal__header, .lens-modal__body { padding: 16px; }
  .lens-side-panel { width: 100vw; }
  .lens-page { padding: var(--lens-space-sm); }
  .lens-page__header { margin-bottom: var(--lens-space-md); }
  .lens-topbar__tabs .lens-tab span { display: none; }
  .lens-topbar__tabs .lens-tab { padding: 0 8px; min-width: 36px; justify-content: center; height: 36px; }
  .lens-topbar__tabs .lens-tab svg { width: 18px; height: 18px; }
  .lens-topbar__tabs { margin-left: var(--lens-space-sm); }
  .lens-topbar { padding: 0 var(--lens-space-sm); gap: var(--lens-space-xs); }
  .lens-kpi { padding: 16px; min-height: 120px; }
  .lens-btn { padding: 10px 16px; }
  .lens-btn--sm { padding: 6px 12px; }
  .lens-breadcrumbs { padding: 0 var(--lens-space-sm); }
  .lens-breadcrumbs__actions { display: none; }
  .lens-table { font-size: var(--lens-text-caption); }
  .lens-table thead th, .lens-table tbody td { padding: 8px 10px; }
}