/* ==========================================================================
   ChainVault - Layout System
   CSS Grid App Shell | Sidebar + Topbar + Content
   ========================================================================== */

/* -----------------------------------------------------------------------
   APP SHELL - CSS Grid
   ----------------------------------------------------------------------- */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--topbar-height) 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar content";
  height: 100vh;
  height: 100dvh;
  width: 100%;
  overflow: hidden;
}

/* -----------------------------------------------------------------------
   SIDEBAR
   ----------------------------------------------------------------------- */
.sidebar {
  grid-area: sidebar;
  grid-row: 1 / -1;
  display: flex;
  flex-direction: column;
  width: var(--sidebar-width);
  height: 100%;
  background-color: var(--color-bg-sidebar);
  border-right: 1px solid var(--color-border-subtle);
  z-index: var(--z-sidebar);
  overflow: hidden;
  transition: transform var(--transition-slow) var(--ease-out-expo);
}

/* --- Logo Area --- */
.sidebar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-5);
  height: var(--topbar-height);
  border-bottom: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

.sidebar__logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-lg);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-bg-deepest);
  box-shadow: var(--glow-green-sm);
  flex-shrink: 0;
}

.sidebar__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
}

.sidebar__logo-text span {
  color: var(--color-primary);
}

/* --- Navigation --- */
.sidebar__nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar__nav-label {
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  padding: var(--space-4) var(--space-3) var(--space-2);
}

.sidebar__nav-label:first-child {
  padding-top: var(--space-1);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-tertiary);
  border-radius: var(--radius-md);
  border-left: 3px solid transparent;
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.sidebar__link:hover {
  color: var(--color-text-secondary);
  background-color: rgba(255, 255, 255, 0.03);
}

.sidebar__link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-ghost);
  border-left-color: var(--color-primary);
}

.sidebar__link.active .sidebar__link-icon {
  color: var(--color-primary);
}

.sidebar__link-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  font-size: var(--text-base);
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

.sidebar__link-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__link-badge {
  margin-left: auto;
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  padding: 2px 6px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-subtle);
  color: var(--color-primary);
}

/* --- Sidebar Header Wrapper --- */
.sidebar__header {
  flex-shrink: 0;
}

/* --- Nav List / Item / Link (HTML uses nav__ prefix) --- */
.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav__item {
  list-style: none;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-tertiary);
  border-radius: var(--radius-md);
  border-left: 3px solid transparent;
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.nav__link:hover {
  color: var(--color-text-secondary);
  background-color: rgba(255, 255, 255, 0.03);
}

.nav__link--active,
.nav__link--active:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-ghost);
  border-left-color: var(--color-primary);
}

.nav__link--active .nav__icon {
  color: var(--color-primary);
}

.nav__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

/* --- Network Dot (sidebar footer) --- */
.network-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-text-muted);
  flex-shrink: 0;
}

.network-dot--active {
  background-color: var(--color-primary);
  box-shadow: 0 0 6px var(--color-primary-muted);
  animation: pulse-dot 2s ease-in-out infinite;
}

/* --- Sidebar Footer Network Display --- */
.sidebar__network {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
}

.sidebar__network-label {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* --- Sidebar Footer --- */
.sidebar__footer {
  padding: var(--space-4) var(--space-3);
  border-top: 1px solid var(--color-border-subtle);
  flex-shrink: 0;
}

.sidebar__user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.sidebar__user:hover {
  background-color: rgba(255, 255, 255, 0.03);
}

.sidebar__avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  color: var(--color-bg-deepest);
  flex-shrink: 0;
}

.sidebar__user-info {
  overflow: hidden;
}

.sidebar__user-name {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__user-role {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* -----------------------------------------------------------------------
   TOPBAR
   ----------------------------------------------------------------------- */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: var(--topbar-height);
  padding: 0 var(--space-6);
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border-subtle);
  z-index: var(--z-topbar);
  backdrop-filter: blur(var(--glass-blur-sm)) saturate(var(--glass-saturate));
}

.topbar__left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.topbar__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.topbar__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.topbar__breadcrumb-separator {
  color: var(--color-text-muted);
}

.topbar__breadcrumb-current {
  color: var(--color-text-secondary);
}

/* Mobile menu toggle */
.topbar__menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  background: none;
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topbar__menu-btn:hover {
  background-color: var(--color-bg-elevated);
  color: var(--color-text-primary);
}

.topbar__menu-btn span {
  font-size: var(--text-lg);
}

.topbar__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Network Selector */
.topbar__network {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topbar__network:hover {
  border-color: var(--color-border-strong);
  background-color: var(--color-bg-elevated);
}

.topbar__network-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  box-shadow: 0 0 6px var(--color-primary-muted);
  animation: pulse-dot 2s ease-in-out infinite;
}

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

.topbar__network-name {
  white-space: nowrap;
}

.topbar__network-chevron {
  font-size: var(--text-2xs);
  color: var(--color-text-muted);
}

/* Notification Bell */
.topbar__icon-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-tertiary);
  transition: all var(--transition-fast);
}

.topbar__icon-btn:hover {
  background-color: var(--color-bg-elevated);
  color: var(--color-text-secondary);
}

.topbar__icon-btn span {
  font-size: var(--text-lg);
}

.topbar__notification-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-danger);
  border: 2px solid var(--color-bg-primary);
}

/* Topbar SVG icon sizing */
.topbar__icon-btn svg {
  width: 18px;
  height: 18px;
}

/* --- Topbar Network Badge (HTML uses topbar__network-badge) --- */
.topbar__network-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.topbar__network-badge:hover {
  border-color: var(--color-border-strong);
}

/* --- Topbar Wallet Chip --- */
.topbar__wallet {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-1) var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.topbar__wallet .wallet-address {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.topbar__wallet .btn--icon {
  width: 28px;
  height: 28px;
  padding: var(--space-1);
}

.topbar__wallet .btn--icon svg {
  width: 14px;
  height: 14px;
}

/* --- Breadcrumb Navigation --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
}

.breadcrumb__item {
  color: var(--color-text-tertiary);
}

.breadcrumb__link {
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
  color: var(--color-text-secondary);
}

.breadcrumb__separator {
  color: var(--color-text-muted);
  user-select: none;
}

.breadcrumb__item--current {
  color: var(--color-text-secondary);
  font-weight: var(--weight-medium);
}

/* Wallet Connection Status */
.topbar__wallet-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topbar__wallet-status:hover {
  border-color: var(--color-primary-subtle);
}

.topbar__wallet-status--connected {
  color: var(--color-primary);
  border-color: var(--color-success-border);
  background-color: var(--color-success-bg);
}

.topbar__wallet-status--disconnected {
  color: var(--color-text-tertiary);
  background-color: var(--color-bg-tertiary);
}

.topbar__wallet-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
}

.topbar__wallet-status--connected .topbar__wallet-dot {
  background-color: var(--color-primary);
  box-shadow: 0 0 6px var(--color-primary-muted);
}

.topbar__wallet-status--disconnected .topbar__wallet-dot {
  background-color: var(--color-text-muted);
}

/* -----------------------------------------------------------------------
   MAIN CONTENT AREA
   ----------------------------------------------------------------------- */
.main-content {
  grid-area: content;
  padding: var(--content-padding);
  overflow-y: auto;
  overflow-x: hidden;
  background-color: var(--color-bg-primary);
  min-height: 0; /* prevent grid blowout */
}

.main-content__inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
}

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

.page-header__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
}

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

.page-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* -----------------------------------------------------------------------
   MOBILE OVERLAY
   ----------------------------------------------------------------------- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.60);
  backdrop-filter: blur(4px);
  z-index: calc(var(--z-sidebar) - 1);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.sidebar-overlay.active {
  opacity: 1;
}

/* -----------------------------------------------------------------------
   RESPONSIVE - Sidebar Collapse
   ----------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "content";
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    height: 100vh;
    height: 100dvh;
    transform: translateX(-100%);
    box-shadow: var(--shadow-2xl);
  }

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

  .sidebar-overlay {
    display: block;
  }

  .topbar__menu-btn {
    display: flex;
  }

  .main-content {
    padding: var(--content-padding-mobile);
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 0 var(--space-4);
  }

  .topbar__network-name {
    display: none;
  }

  .topbar__wallet-status span:not(.topbar__wallet-dot) {
    display: none;
  }

  .topbar__title {
    font-size: var(--text-base);
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }
}