/* ============================================================
   CADITECH ADMIN DASHBOARD - LAYOUT
   Shell · Sidebar · Header · Grid
   ============================================================ */

/* ── APP SHELL ────────────────────────────────────────────── */
.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: auto 1fr;
  height: 100vh;
  overflow: hidden;
  transition: grid-template-columns var(--duration-normal) var(--ease-out);
}

.app-shell.sidebar-collapsed {
  grid-template-columns: 68px 1fr;
}

/* ── SIDEBAR ──────────────────────────────────────────────── */
.sidebar {
  grid-row: 1 / -1;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  z-index: 100;
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(56, 189, 248, 0.04), transparent 60%),
    radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.03), transparent 50%);
  pointer-events: none;
}

.sidebar-brand {
  padding: 18px 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  z-index: 1;
  min-height: 62px;
}

.sidebar-brand-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

.sidebar-brand-text {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: opacity var(--duration-normal) var(--ease-out),
              width var(--duration-normal) var(--ease-out);
}

.sidebar-brand-name {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: #fff;
  white-space: nowrap;
}

.sidebar-brand-sub {
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
}

.app-shell.sidebar-collapsed .sidebar-brand-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

/* Sidebar nav */
.sidebar-nav {
  flex: 1;
  padding: var(--space-md) var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
  position: relative;
  z-index: 1;
}

.sidebar-section-label {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  padding: 12px 12px 6px;
  white-space: nowrap;
  overflow: hidden;
  transition: opacity var(--duration-normal);
}

.app-shell.sidebar-collapsed .sidebar-section-label {
  opacity: 0;
  height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
}

.sidebar-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  text-decoration: none;
}

.sidebar-link.active {
  color: var(--cyan);
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.15);
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--cyan);
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.sidebar-link-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.sidebar-link-text {
  overflow: hidden;
  transition: opacity var(--duration-normal) var(--ease-out),
              width var(--duration-normal) var(--ease-out);
}

.app-shell.sidebar-collapsed .sidebar-link-text {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.app-shell.sidebar-collapsed .sidebar-link {
  justify-content: center;
  padding: 10px;
}

/* Sidebar footer */
.sidebar-footer {
  padding: var(--space-md);
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 1;
}

.sidebar-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  transition: all var(--duration-fast) var(--ease-out);
}

.sidebar-toggle:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-secondary);
}

.sidebar-toggle-text {
  transition: opacity var(--duration-normal) var(--ease-out),
              width var(--duration-normal) var(--ease-out);
  overflow: hidden;
  white-space: nowrap;
}

.app-shell.sidebar-collapsed .sidebar-toggle-text {
  opacity: 0;
  width: 0;
}

.sidebar-toggle-icon {
  transition: transform var(--duration-normal) var(--ease-out);
}

.app-shell.sidebar-collapsed .sidebar-toggle-icon {
  transform: rotate(180deg);
}

/* ── TOP HEADER ───────────────────────────────────────────── */
.top-header {
  position: relative;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  padding: 12px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  z-index: 500;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-page-title {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: #fff;
}

.header-breadcrumb {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-breadcrumb span { color: var(--text-secondary); }

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

.header-search {
  position: relative;
}

.header-search-input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 7px 14px 7px 34px;
  font-size: 12px;
  color: var(--text-primary);
  width: 220px;
  transition: all var(--duration-fast) var(--ease-out);
}

.header-search-input::placeholder { color: var(--text-muted); }

.header-search-input:focus {
  border-color: var(--border-focus);
  width: 280px;
  background: rgba(255, 255, 255, 0.06);
}

.header-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--text-muted);
  pointer-events: none;
}

.header-icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
  position: relative;
  transition: all var(--duration-fast) var(--ease-out);
}

.header-icon-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}

.header-icon-btn .notif-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: var(--red);
  border-radius: 50%;
  border: 2px solid var(--bg-header);
}

.header-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  border: 2px solid rgba(56, 189, 248, 0.3);
  transition: border-color var(--duration-fast);
}

.header-avatar:hover { border-color: var(--cyan); }

/* ── HEADER DROPDOWNS & POPOVERS ─────────────────────────── */
.header-dropdown-wrap {
  position: relative;
  display: inline-flex;
}

.header-popover {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: #0d1326;
  background: rgba(13, 19, 38, 0.95);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.75), 0 0 0 1px rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(24px);
  z-index: 1000;
  display: none;
  overflow: hidden;
  animation: popoverSlideIn var(--duration-fast) var(--ease-out);
}

.header-popover.open {
  display: flex;
  flex-direction: column;
}

@keyframes popoverSlideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Notifications Popover */
.notif-popover {
  width: 360px;
  max-width: 90vw;
  max-height: 480px;
}

.popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.02);
}

.notif-list {
  overflow-y: auto;
  max-height: 340px;
  display: flex;
  flex-direction: column;
}

.notif-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background var(--duration-fast);
  text-decoration: none;
  cursor: pointer;
}

.notif-item:hover {
  background: rgba(255, 255, 255, 0.04);
}

.notif-item.unread {
  background: rgba(56, 189, 248, 0.04);
}

.notif-item-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}

.notif-item-content {
  flex: 1;
  min-width: 0;
}

.notif-item-title {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 2px;
}

.notif-item-desc {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: 4px;
}

.notif-item-time {
  font-size: 10px;
  color: var(--text-muted);
}

.popover-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.02);
  text-align: center;
}

.popover-footer-link {
  font-size: 11px;
  color: var(--cyan);
  font-weight: 600;
  text-decoration: none;
}

.popover-footer-link:hover {
  text-decoration: underline;
}

/* Profile Popover */
.profile-popover {
  width: 290px;
}

.profile-popover-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
}

.profile-avatar-lg {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  border: 2px solid rgba(56, 189, 248, 0.4);
  flex-shrink: 0;
}

.popover-divider {
  height: 1px;
  background: var(--border-subtle);
}

.popover-nav {
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.popover-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
  transition: background var(--duration-fast);
}

.popover-nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.popover-nav-icon {
  font-size: 16px;
  width: 22px;
  text-align: center;
}

.popover-nav-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.popover-nav-title {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}

.popover-nav-sub {
  font-size: 10px;
  color: var(--text-muted);
}

.profile-popover-actions {
  padding: 12px;
  background: rgba(255, 255, 255, 0.02);
}

/* ── MAIN CONTENT ─────────────────────────────────────────── */
.main-content {
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg-root);
  position: relative;
}

.main-content::before {
  content: '';
  position: fixed;
  top: 0;
  right: 0;
  width: 60%;
  height: 60%;
  background:
    radial-gradient(circle at 70% 20%, rgba(56, 189, 248, 0.04), transparent 50%),
    radial-gradient(circle at 30% 80%, rgba(99, 102, 241, 0.03), transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.page-content {
  position: relative;
  z-index: 1;
  padding: var(--space-lg) 28px;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.page-header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
}

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

/* ── GRID LAYOUTS ─────────────────────────────────────────── */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.grid-dashboard {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-md);
}

/* ── RESPONSIVE ───────────────────────────────────────────── */
@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-dashboard { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 68px 1fr;
  }
  .sidebar-brand-text,
  .sidebar-link-text,
  .sidebar-section-label,
  .sidebar-toggle-text {
    opacity: 0;
    width: 0;
    overflow: hidden;
  }
  .sidebar-link {
    justify-content: center;
    padding: 10px;
  }
  .sidebar-toggle-icon {
    transform: rotate(180deg);
  }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-stats { grid-template-columns: repeat(2, 1fr); }
  .page-content { padding: var(--space-md) var(--space-md); }
  .top-header { padding: 10px 16px; }
  .header-search-input { width: 160px; }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-stats { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; }
}