/**
 * HRZ OPS - Layout System
 * Grid, Sidebar, Topbar & main layout structure
 * Version: 2.0
 */

/* ===== APP CONTAINER ===== */
.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
}

/* ===== TOPBAR ===== */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex: 1;
}

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

.sidebar-toggle-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
}

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

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

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: var(--font-weight-semibold);
}

.breadcrumb-separator {
  color: var(--text-tertiary);
  user-select: none;
}

/* Topbar Icon Buttons */
.topbar-icon-btn {
  position: relative;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topbar-icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.notification-badge {
  position: absolute;
  top: 6px;
  right: 6px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: var(--rose);
  color: #fff;
  font-size: 9px;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-strong);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-icon {
  position: absolute;
  transition: all var(--transition-base);
}

.theme-icon-light {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-icon-dark {
  opacity: 0;
  transform: rotate(180deg) scale(0);
}

[data-theme="light"] .theme-icon-light {
  opacity: 0;
  transform: rotate(-180deg) scale(0);
}

[data-theme="light"] .theme-icon-dark {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed;
  top: var(--topbar-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: linear-gradient(
    180deg,
    var(--bg-secondary) 0%,
    var(--bg-primary) 100%
  );
  border-right: 1px solid var(--border-default);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: var(--z-sticky);
  transition: width var(--transition-base);
}

[data-theme="light"] .sidebar {
  box-shadow: 2px 0 12px rgba(0, 0, 0, 0.04);
}

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

/* Sidebar Header */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  min-height: 60px;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.logo-icon {
  font-size: 24px;
}

.logo-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--emerald), var(--sky));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.sidebar.collapsed .logo-text {
  display: none;
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-2) 0;
}

.sidebar-nav::-webkit-scrollbar {
  width: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Nav Section */
.nav-section {
  margin-bottom: var(--space-4);
}

.nav-section-header {
  padding: var(--space-2) var(--space-4);
  margin-bottom: var(--space-1);
}

.nav-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
}

.sidebar.collapsed .nav-section-header {
  display: none;
}

/* Nav Item */
.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  margin: 0 var(--space-2);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
  cursor: pointer;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

[data-theme="light"] .nav-item:hover {
  background: rgba(0, 0, 0, 0.03);
}

.nav-item.active {
  background: rgba(52, 211, 153, 0.1);
  color: var(--emerald);
  font-weight: var(--font-weight-semibold);
}

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

.nav-icon {
  font-size: 18px;
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

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

.sidebar.collapsed .nav-label {
  display: none;
}

.nav-counter,
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
}

.nav-badge.badge-info {
  background: rgba(56, 189, 248, 0.15);
  color: var(--sky);
}

.nav-badge.badge-success {
  background: rgba(52, 211, 153, 0.15);
  color: var(--emerald);
}

.nav-badge.badge-warning {
  background: rgba(251, 191, 36, 0.15);
  color: var(--amber);
}

.sidebar.collapsed .nav-counter,
.sidebar.collapsed .nav-badge {
  position: absolute;
  top: 4px;
  right: 4px;
}

/* Status Indicator */
.status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-success { background: var(--emerald); }
.status-warning { background: var(--amber); }
.status-error { background: var(--rose); }

/* Sidebar Footer */
.sidebar-footer {
  padding: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

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

.user-profile:hover {
  background: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .user-profile:hover {
  background: rgba(0, 0, 0, 0.03);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-tertiary);
}

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

.user-info {
  flex: 1;
  min-width: 0;
}

.sidebar.collapsed .user-info {
  display: none;
}

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

.user-status {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-online { background: var(--emerald); }
.status-away { background: var(--amber); }
.status-offline { background: var(--text-disabled); }

/* ===== MAIN LAYOUT ===== */
.app-layout {
  display: flex;
  margin-top: var(--topbar-height);
  min-height: calc(100vh - var(--topbar-height));
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--space-6);
  transition: margin-left var(--transition-base);
  max-width: 100%;
  overflow-x: hidden;
}

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

/* Loading State */
.main-content.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Error State */
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  gap: var(--space-4);
  text-align: center;
}

.error-icon {
  font-size: 48px;
}

.error-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.error-message {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  max-width: 400px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

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

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

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

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

  .breadcrumbs {
    display: none;
  }
}