/* ==========================================================================
   PayVoice Application Shell, Sidebar, Topbar & Responsive Grids
   ========================================================================== */

@layer layout {
  .app-shell {
    display: flex;
    min-block-size: 100dvh;
    background-color: var(--color-bg-canvas);
  }

  /* ------------------------------------------------------------------------
     Obsidian Navigation Sidebar
     ------------------------------------------------------------------------ */
  .sidebar {
    inline-size: var(--sidebar-width);
    flex-shrink: 0;
    background:
      radial-gradient(circle at 12% 4%, rgba(37, 99, 235, 0.24), transparent 46%),
      radial-gradient(circle at 88% 92%, rgba(2, 132, 199, 0.14), transparent 45%),
      var(--color-sidebar-bg);
    color: var(--color-sidebar-text);
    display: flex;
    flex-direction: column;
    position: sticky;
    inset-block-start: 0;
    block-size: 100dvh;
    border-inline-end: 1px solid var(--color-sidebar-border);
    z-index: var(--z-sidebar);
    transition: transform var(--transition-base);
    overscroll-behavior: contain;
  }

  .sidebar-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.125rem 1.25rem;
    border-block-end: 1px solid var(--color-sidebar-border);
    min-block-size: var(--header-height);
  }

  .brand-mark {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-inverse);
    text-decoration: none;
    min-inline-size: 0;
  }

  .brand-mark:hover {
    color: var(--color-text-inverse);
  }

  .brand-icon {
    inline-size: 2.25rem;
    block-size: 2.25rem;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #2563eb 0%, #0284c7 100%);
    color: #ffffff;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    box-shadow:
      0 6px 16px -4px rgba(37, 99, 235, 0.55),
      inset 0 1px 0 rgba(255, 255, 255, 0.3);
  }

  .brand-text {
    display: flex;
    flex-direction: column;
    min-inline-size: 0;
  }

  .brand-name {
    font-size: 1.0625rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: #ffffff;
    line-height: 1.15;
  }

  .brand-sub {
    font-size: 0.6875rem;
    color: #8ea0ba;
    letter-spacing: 0.02em;
    font-weight: 500;
    margin-block-start: 0.125rem;
  }

  .sidebar-close-btn {
    display: none;
    color: var(--color-sidebar-text);
    padding: 0.375rem;
    border-radius: var(--radius-sm);
    min-inline-size: 2rem;
    min-block-size: 2rem;
    place-items: center;
  }

  .sidebar-close-btn:hover {
    color: #ffffff;
    background-color: var(--color-sidebar-hover-bg);
  }

  .sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.125rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(148, 163, 184, 0.25) transparent;
  }

  .nav-group-label {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748b;
    padding-inline: 0.75rem;
    margin-block-end: 0.375rem;
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.1875rem;
  }

  .nav-item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    min-block-size: 2.375rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    color: var(--color-sidebar-text);
    font-size: var(--text-sm);
    font-weight: 500;
    text-align: start;
    transition: background-color var(--transition-fast), color var(--transition-fast);
  }

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

  .nav-item.active {
    background-color: var(--color-sidebar-active-bg);
    color: var(--color-sidebar-text-active);
    font-weight: 600;
    box-shadow: inset 0 0 0 1px rgba(96, 165, 250, 0.22);
  }

  .nav-item.active::before {
    content: "";
    position: absolute;
    inset-inline-start: 0;
    inset-block: 0.45rem;
    inline-size: 3px;
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    background: linear-gradient(180deg, #60a5fa, #38bdf8);
  }

  .nav-icon {
    inline-size: 1.0625rem;
    block-size: 1.0625rem;
    flex-shrink: 0;
    opacity: 0.85;
  }

  .nav-item.active .nav-icon {
    opacity: 1;
    color: #60a5fa;
  }

  .nav-badge {
    margin-inline-start: auto;
    font-size: 0.6875rem;
    font-weight: 700;
    padding: 0.125rem 0.4375rem;
    border-radius: var(--radius-full);
    background: rgba(56, 189, 248, 0.16);
    color: #7dd3fc;
    border: 1px solid rgba(56, 189, 248, 0.28);
    letter-spacing: 0.03em;
  }

  .sidebar-footer {
    padding: 0.875rem 0.75rem 1rem;
    border-block-start: 1px solid var(--color-sidebar-border);
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
  }

  .security-status-pill {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.6875rem;
    border-radius: var(--radius-md);
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(52, 211, 153, 0.22);
    color: #6ee7b7;
    font-size: 0.75rem;
    font-weight: 600;
  }

  .status-dot {
    inline-size: 0.5rem;
    block-size: 0.5rem;
    border-radius: var(--radius-full);
    background-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.22);
    flex-shrink: 0;
  }

  .merchant-mini-card {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5625rem 0.625rem;
    border-radius: var(--radius-md);
    background-color: var(--color-sidebar-surface);
    border: 1px solid var(--color-sidebar-border);
  }

  .merchant-avatar {
    inline-size: 2rem;
    block-size: 2rem;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #1d4ed8, #0284c7);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 700;
    display: grid;
    place-items: center;
    flex-shrink: 0;
  }

  .merchant-meta {
    display: flex;
    flex-direction: column;
    min-inline-size: 0;
  }

  .merchant-meta strong {
    color: #f8fafc;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .merchant-meta span {
    color: #94a3b8;
    font-size: 0.6875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(4, 8, 18, 0.64);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-sidebar) - 1);
  }

  /* ------------------------------------------------------------------------
     Main Wrapper & Frosted Sticky Topbar
     ------------------------------------------------------------------------ */
  .main-wrapper {
    flex: 1;
    min-inline-size: 0;
    display: flex;
    flex-direction: column;
  }

  .topbar {
    position: sticky;
    inset-block-start: 0;
    z-index: var(--z-topbar);
    min-block-size: var(--header-height);
    background-color: var(--color-bg-topbar);
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    border-block-end: 1px solid var(--color-border);
    padding: 0.625rem var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
  }

  .topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    min-inline-size: 0;
  }

  .mobile-menu-btn {
    display: none;
    inline-size: 2.375rem;
    block-size: 2.375rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-surface);
    color: var(--color-text-primary);
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  .mobile-menu-btn:hover {
    background-color: var(--color-bg-subtle);
  }

  .breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--text-sm);
    min-inline-size: 0;
  }

  .crumb-root {
    color: var(--color-text-muted);
    font-weight: 500;
  }

  .crumb-sep {
    color: var(--color-border-strong);
  }

  .crumb-current {
    color: var(--color-text-primary);
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .topbar-right {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex-shrink: 0;
  }

  .env-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.4375rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-full);
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    color: var(--color-success);
    font-size: var(--text-xs);
    font-weight: 600;
    white-space: nowrap;
  }

  .env-indicator.env-offline {
    background-color: var(--color-warning-bg);
    border-color: var(--color-warning-border);
    color: var(--color-warning);
  }

  .env-text-short {
    display: none;
  }

  .lang-pill-select {
    min-block-size: 2.125rem;
    padding: 0.3125rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    cursor: pointer;
  }

  .topbar-icon-btn {
    position: relative;
    inline-size: 2.25rem;
    block-size: 2.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-surface);
    color: var(--color-text-secondary);
    display: grid;
    place-items: center;
    transition: background-color var(--transition-fast), color var(--transition-fast),
      border-color var(--transition-fast);
  }

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

  .notif-dot {
    position: absolute;
    inset-block-start: 0.4375rem;
    inset-inline-end: 0.4375rem;
    inline-size: 0.4375rem;
    block-size: 0.4375rem;
    border-radius: var(--radius-full);
    background-color: var(--color-danger);
    box-shadow: 0 0 0 2px var(--color-bg-surface);
    display: none;
  }

  .notif-dot.visible {
    display: block;
  }

  /* ------------------------------------------------------------------------
     Main Content Container & Grids
     ------------------------------------------------------------------------ */
  .main-content {
    flex: 1;
    padding: var(--space-6);
    inline-size: 100%;
    max-inline-size: var(--content-max-width);
    margin-inline: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    scrollbar-gutter: stable;
  }

  .page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-4);
    flex-wrap: wrap;
    padding-block-end: var(--space-2);
  }

  .page-header-copy {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-inline-size: 0;
  }

  .page-eyebrow {
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-brand-primary);
  }

  .page-title {
    font-size: var(--text-2xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
  }

  .page-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    max-inline-size: 62ch;
  }

  .page-actions,
  .page-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
  }

  .kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
  }

  .grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .grid-12-7-5 {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-5);
  }

  .table-responsive {
    inline-size: 100%;
    overflow-x: auto;
    overflow-y: auto;
    max-block-size: 32rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-surface);
    container-type: inline-size;
    scrollbar-width: thin;
  }

  .table-responsive:focus-visible {
    outline: 2px solid var(--color-brand-primary);
    outline-offset: 2px;
  }

  /* ------------------------------------------------------------------------
     Responsive Breakpoints
     ------------------------------------------------------------------------ */
  @media (max-width: 1200px) {
    .kpi-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .grid-12-7-5,
    .grid-3 {
      grid-template-columns: minmax(0, 1fr);
    }
  }

  @media (max-width: 960px) {
    .sidebar {
      position: fixed;
      inset-block: 0;
      inset-inline-start: 0;
      transform: translateX(-100%);
    }

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

    .sidebar-backdrop.open,
    .sidebar-backdrop.visible {
      display: block;
    }

    .sidebar-close-btn {
      display: grid;
    }

    .mobile-menu-btn {
      display: inline-flex;
    }

    .grid-2 {
      grid-template-columns: minmax(0, 1fr);
    }

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

    .main-content {
      padding: var(--space-4);
      gap: var(--space-5);
    }
  }

  @media (max-width: 640px) {
    .env-text-full {
      display: none;
    }

    .env-text-short {
      display: inline;
    }

    .crumb-root,
    .crumb-sep {
      display: none;
    }
  }

  @media (max-width: 480px) {
    .kpi-grid {
      grid-template-columns: minmax(0, 1fr);
    }

    .topbar-right {
      gap: 0.375rem;
    }
  }
}