/* ============================================================
   FamilyHub v2.0 — Layout
   Blueprint §9.2 — App shell: sidebar, topbar, main, panel
   ============================================================ */

/* ── Reset & Base ────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--leading-normal);
  overflow: hidden;
  height: 100dvh;
  width: 100vw;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── App Grid (Blueprint §9.2) ──────────────────────────── */
#app {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--topbar-height) var(--breadcrumb-height) 1fr;
  height: 100dvh;
  width: 100vw;
  overflow: hidden;
}

/* ── Auth Screen (full-screen, overlays #app) ────────────── */
#auth-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand);
  /* Hidden after login */
}

#auth-screen.hidden {
  display: none;
}

.auth-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  padding: var(--space-8) var(--space-8);
  width: 100%;
  max-width: 420px;
  margin: var(--space-4);
}

.auth-logo {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  color: var(--color-brand);
  margin-bottom: var(--space-1);
  display: block;
  text-align: center;
}

.auth-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--space-6);
}

.auth-tabs {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-1);
}

.auth-tab {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border: none;
  background: transparent;
  border-radius: calc(var(--radius-md) - 2px);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
}

.auth-tab.active {
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

/* ── Topbar ─────────────────────────────────────────────── */
#topbar {
  grid-column: 1 / -1;
  grid-row: 1;
  position: sticky;
  top: 0;
  z-index: var(--z-topbar);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 0 var(--space-4);
  background: var(--color-topbar-bg);
  border-bottom: 1px solid var(--color-topbar-border);
  box-shadow: var(--shadow-xs);
  height: var(--topbar-height);
}

#topbar-hamburger {
  display: none; /* shown on mobile */
  background: none;
  border: none;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text);
  flex-shrink: 0;
}

#topbar-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-brand);
  flex-shrink: 0;
  user-select: none;
}

#topbar-spacer {
  flex: 1;
}

#topbar-search-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1-5) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

#topbar-search-btn:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

#topbar-sync-indicator {
  font-size: var(--text-lg);
  line-height: 1;
  cursor: default;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

#topbar-sync-indicator.syncing  { color: var(--color-info);    animation: spin 1.2s linear infinite; }
#topbar-sync-indicator.success  { color: var(--color-success); }
#topbar-sync-indicator.error    { color: var(--color-danger);  }
#topbar-sync-indicator.offline  { color: var(--color-text-muted); }

@keyframes spin {
  to { transform: rotate(360deg); }
}

#topbar-notifications-btn {
  position: relative;
  background: none;
  border: none;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 1.1rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

#topbar-notifications-btn:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.notif-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 16px;
  height: 16px;
  background: var(--color-danger);
  color: #fff;
  font-size: 10px;
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 3px;
  line-height: 1;
}

.notif-badge:empty,
.notif-badge[data-count="0"] {
  display: none;
}

#topbar-user-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

#topbar-user-btn:hover {
  background: var(--color-surface);
}

.user-avatar {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  flex-shrink: 0;
  overflow: hidden;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#topbar-user-name {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Breadcrumb Row (Blueprint §9.2 — separate row below topbar) ── */
#breadcrumb-row {
  grid-column: 1 / -1;
  grid-row: 2;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0 var(--space-4) 0 calc(var(--sidebar-width) + var(--space-4));
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  height: var(--breadcrumb-height);
  min-height: var(--breadcrumb-height);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  overflow: hidden;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  white-space: nowrap;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.breadcrumb-item:hover { color: var(--color-text); }
.breadcrumb-item.active { color: var(--color-text); font-weight: var(--weight-medium); cursor: default; }

.breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
  flex-shrink: 0;
}

#breadcrumb-back-btn {
  background: none;
  border: none;
  padding: var(--space-0-5) var(--space-1-5);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: background var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
}

#breadcrumb-back-btn:hover {
  background: var(--color-border);
  color: var(--color-text);
}

#breadcrumb-back-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ── Sidebar ─────────────────────────────────────────────── */
#sidebar {
  grid-column: 1;
  grid-row: 2 / -1; /* spans breadcrumb + main rows */
  background: var(--color-sidebar-bg);
  box-shadow: var(--shadow-sidebar);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  z-index: var(--z-sidebar);
  transition: transform var(--transition-xslow);
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 2px; }

/* ── Sidebar: Family Name Header ─────────────────────────── */
.sidebar-family-name {
  padding: var(--space-4) var(--space-4) var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-sidebar-text-active);
  letter-spacing: 0.01em;
  border-bottom: 1px solid var(--color-sidebar-border);
  margin-bottom: var(--space-2);
  flex-shrink: 0;
}

/* ── Sidebar: Nav ────────────────────────────────────────── */
.sidebar-nav {
  flex: 1;
  padding: var(--space-2) var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-0-5);
}

.sidebar-section-label {
  padding: var(--space-3) var(--space-2) var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(148, 163, 184, 0.55);
  user-select: none;
  flex-shrink: 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-sidebar-text);
  font-size: var(--text-sm);
  font-weight: var(--weight-regular);
  transition: background var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
  user-select: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  position: relative;
}

.nav-item:hover {
  background: var(--color-sidebar-hover);
  color: var(--color-sidebar-text-active);
}

.nav-item.active {
  background: var(--color-sidebar-active);
  color: var(--color-sidebar-text-active);
  font-weight: var(--weight-medium);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--color-sidebar-accent);
  border-radius: 0 2px 2px 0;
}

.nav-item-icon {
  font-size: 1rem;
  line-height: 1;
  flex-shrink: 0;
  width: 1.25rem;
  text-align: center;
}

.nav-item-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item-badge {
  min-width: 18px;
  height: 18px;
  background: var(--color-danger);
  color: #fff;
  font-size: 10px;
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  flex-shrink: 0;
}

/* ── Sidebar: User Footer ────────────────────────────────── */
.sidebar-footer {
  padding: var(--space-3) var(--space-2);
  border-top: 1px solid var(--color-sidebar-border);
  flex-shrink: 0;
}

.sidebar-logout-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-sidebar-text);
  font-size: var(--text-sm);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: background var(--transition-fast), color var(--transition-fast);
}

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

/* ── Main Content Area ───────────────────────────────────── */
#main {
  grid-column: 2;
  grid-row: 3;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--color-bg);
  position: relative;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

#main::-webkit-scrollbar { width: var(--scrollbar-width); }
#main::-webkit-scrollbar-track { background: transparent; }
#main::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }

/* ── View Shells ─────────────────────────────────────────── */
.view {
  display: none;
  opacity: 0;
  animation: viewFadeIn var(--transition-slow) forwards;
  min-height: 100%;
  padding: var(--space-6);
}

.view.active {
  display: block;
}

@keyframes viewFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Graph View: 3-column layout (Blueprint §9.2) ─────────── */
#main.graph-active {
  display: grid;
  grid-template-columns: var(--graph-filter-width) 1fr var(--panel-width);
  overflow: hidden;
  padding: 0;
}

#view-graph {
  display: none; /* overridden when active */
  padding: 0;
}

#view-graph.active {
  display: contents; /* children flow into #main grid */
}

/* ── Entity Panel (Blueprint §9.2 — fixed right overlay) ──── */
#entity-panel {
  position: fixed;
  top: calc(var(--topbar-height) + var(--breadcrumb-height));
  right: 0;
  width: var(--panel-width);
  height: calc(100dvh - var(--topbar-height) - var(--breadcrumb-height));
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-panel);
  z-index: var(--z-panel);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-xslow);
  overflow: hidden;
}

#entity-panel.open {
  transform: translateX(0);
}

#entity-panel-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

#entity-panel-close {
  margin-left: auto;
  background: none;
  border: none;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 1rem;
  transition: background var(--transition-fast), color var(--transition-fast);
}

#entity-panel-close:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

#entity-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.panel-saving-indicator {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1;   }
}

/* ── Sidebar Overlay (mobile) ───────────────────────────── */
#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  z-index: calc(var(--z-sidebar) - 1);
}

#sidebar-overlay.visible {
  display: block;
}

/* ── Notification Drawer ─────────────────────────────────── */
#notification-drawer {
  position: fixed;
  top: var(--topbar-height);
  right: var(--space-4);
  width: 360px;
  max-height: 480px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-dropdown);
  display: none;
  flex-direction: column;
  overflow: hidden;
}

#notification-drawer.open {
  display: flex;
}

/* ── Search / Command Palette Overlay ───────────────────── */
#search-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: var(--color-overlay);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 80px;
}

#search-overlay.open {
  display: flex;
}

#search-palette {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-width: 580px;
  max-height: 480px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

/* ── FAB ─────────────────────────────────────────────────── */
#fab {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-fab);
}

#fab-main-btn {
  width: var(--fab-size);
  height: var(--fab-size);
  border-radius: var(--radius-full);
  background: var(--color-accent);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  box-shadow: var(--shadow-lg), 0 4px 16px rgba(10, 123, 108, 0.4);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#fab-main-btn:hover {
  transform: scale(1.06);
  box-shadow: var(--shadow-xl), 0 6px 20px rgba(10, 123, 108, 0.5);
}

#fab-main-btn:active {
  transform: scale(0.96);
}

.fab-expanded #fab-main-btn {
  background: var(--color-brand);
  transform: rotate(45deg);
}

.fab-radial {
  position: absolute;
  bottom: calc(var(--fab-size) + var(--space-2));
  right: 0;
  display: none;
  flex-direction: column-reverse;
  gap: var(--space-2);
  align-items: flex-end;
}

.fab-expanded .fab-radial {
  display: flex;
}

.fab-radial-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  animation: fabItemIn var(--transition-slow) both;
}

.fab-radial-item:nth-child(1) { animation-delay: 0ms; }
.fab-radial-item:nth-child(2) { animation-delay: 30ms; }
.fab-radial-item:nth-child(3) { animation-delay: 60ms; }
.fab-radial-item:nth-child(4) { animation-delay: 90ms; }
.fab-radial-item:nth-child(5) { animation-delay: 120ms; }
.fab-radial-item:nth-child(6) { animation-delay: 150ms; }

@keyframes fabItemIn {
  from { opacity: 0; transform: translateY(8px) scale(0.9); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.fab-radial-label {
  font-size: var(--text-sm);
  background: var(--color-brand);
  color: #fff;
  padding: var(--space-1) var(--space-2-5);
  border-radius: var(--radius-full);
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

.fab-radial-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

.fab-radial-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

/* ── Toast Notifications ─────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  background: var(--color-brand);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  animation: toastIn var(--transition-slow) both;
  max-width: 380px;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.toast.success { background: var(--color-success-text); }
.toast.error   { background: var(--color-danger-text); }
.toast.warning { background: var(--color-warning-text); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(16px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Keyboard Shortcuts Help Overlay ────────────────────── */
#shortcuts-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: var(--color-overlay);
  display: none;
  align-items: center;
  justify-content: center;
}

#shortcuts-overlay.open { display: flex; }

/* ── Update Banner ───────────────────────────────────────── */
#update-banner {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-toast);
  background: var(--color-brand);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
}

#update-banner.visible { display: flex; }

/* ── Mobile Breakpoint ───────────────────────────────────── */
@media (max-width: 768px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-rows: var(--topbar-height) var(--breadcrumb-height) 1fr;
  }

  #topbar-hamburger {
    display: flex;
  }

  #topbar-user-name {
    display: none;
  }

  #topbar-search-btn span {
    display: none;
  }

  #sidebar {
    grid-column: 1;
    grid-row: 1 / -1;
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    transform: translateX(-100%);
    z-index: var(--z-sidebar);
  }

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

  #breadcrumb-row {
    padding-left: var(--space-4);
  }

  #main {
    grid-column: 1;
    grid-row: 3;
  }

  #entity-panel {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 70dvh;
    border-left: none;
    border-top: 1px solid var(--color-border);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    box-shadow: 0 -4px 24px rgba(15, 23, 42, 0.12);
    transform: translateY(100%);
  }

  #entity-panel.open {
    transform: translateY(0);
  }

  /* Panel drag handle on mobile */
  #entity-panel::before {
    content: '';
    display: block;
    width: 36px;
    height: 4px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    margin: var(--space-2) auto 0;
    flex-shrink: 0;
  }

  #main.graph-active {
    display: block;
  }

  #view-graph.active {
    display: block;
  }

  #fab {
    bottom: var(--space-4);
    right: var(--space-4);
  }

  .view {
    padding: var(--space-4);
  }

  #notification-drawer {
    left: var(--space-4);
    right: var(--space-4);
    width: auto;
  }
}

/* ── Tablet Breakpoint ───────────────────────────────────── */
@media (max-width: 1024px) and (min-width: 769px) {
  :root {
    --sidebar-width: 200px;
    --panel-width: 320px;
  }
}

/* ── Scrollbar Utility ───────────────────────────────────── */
.scroll-y {
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.scroll-y::-webkit-scrollbar { width: var(--scrollbar-width); }
.scroll-y::-webkit-scrollbar-track { background: transparent; }
.scroll-y::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }