:root {
      --bg: #f5f7fb;
      --panel: #ffffff;
      --soft: #f8fafc;
      --text: #0f172a;
      --muted: #64748b;
      --border: #e2e8f0;
      --primary: #111827;
      --primary-hover: #1f2937;
      --success: #16a34a;
      --danger: #dc2626;
      --sidebar: #0f172a;
      --sidebar-text: #cbd5e1;
      --shadow: 0 18px 40px rgba(15,23,42,.08);
      --radius: 18px;
      --sidebar-width: 260px;
      --sidebar-closed-width: 76px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: Arial, sans-serif;
      font-size: 14px;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    .app {
      min-height: 100vh;
      display: grid;
      grid-template-columns: var(--sidebar-width) 1fr;
      transition: grid-template-columns .18s ease;
    }

    body.sidebar-collapsed .app {
      grid-template-columns: var(--sidebar-closed-width) 1fr;
    }

    .sidebar {
      position: sticky;
      top: 0;
      height: 100vh;
      background: var(--sidebar);
      color: var(--sidebar-text);
      padding: 14px 12px;
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }

    .brand {
      position: relative;
      display: flex;
      align-items: center;
      gap: 10px;
      height: 46px;
      padding: 0 10px;
      margin-bottom: 14px;
    }

    .brand::after {
      position: absolute;
      right: 0;
      bottom: -7px;
      left: 0;
      height: 1px;
      background: rgba(255,255,255,.14);
      content: "";
    }

    .brand-logo {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      display: grid;
      place-items: center;
      background: #fff;
      color: #0f172a;
      font-weight: 900;
      flex: 0 0 auto;
      border: 0;
      font: inherit;
      cursor: pointer;
    }

    .brand-text strong {
      display: block;
      color: #fff;
      font-size: 20px;
      line-height: 1;
    }

    .brand-text span {
      display: block;
      color: #94a3b8;
      font-size: 11px;
      margin-top: 3px;
    }

    body.sidebar-collapsed .brand-text,
    body.sidebar-collapsed .nav-label {
      display: none;
    }

    .sidebar-toggle {
      border: 1px solid rgba(255,255,255,.14);
      background: rgba(255,255,255,.06);
      color: #fff;
      border-radius: 12px;
      height: 40px;
      width: 100%;
      cursor: pointer;
      margin-bottom: 12px;
      font-size: 18px;
    }

    .nav {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1;
    }

    .nav-btn {
      border: 0;
      width: 100%;
      background: transparent;
      color: var(--sidebar-text);
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px;
      border-radius: 14px;
      cursor: pointer;
      font-weight: 700;
      text-align: left;
      min-height: 44px;
    }

    .nav-btn:hover,
    .nav-btn.active {
      background: rgba(255,255,255,.10);
      color: #fff;
    }

    .nav-icon {
      width: 22px;
      text-align: center;
      font-size: 17px;
      flex: 0 0 auto;
    }

    body.sidebar-collapsed .nav-btn {
      justify-content: center;
      padding-left: 0;
      padding-right: 0;
    }

    .sidebar-footer {
      border-top: 1px solid rgba(255,255,255,.10);
      padding-top: 12px;
      display: grid;
      gap: 8px;
    }

    .main {
      min-width: 0;
    }

    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      min-height: 68px;
      background: rgba(255,255,255,.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 12px 22px;
    }

    @media (max-width: 1180px) {
      .topbar {
        position: fixed;
        top: 0;
        right: 0;
        left: var(--sidebar-closed-width);
        width: auto;
        box-sizing: border-box;
      }
      body:not(.sidebar-collapsed) .topbar { left: var(--sidebar-width); }
      .main { padding-top: var(--topbar-height, 92px); }
    }

    .page-kicker {
      color: var(--muted);
      font-size: 12px;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: .08em;
    }

    .page-title {
      margin: 3px 0 0;
      font-size: 23px;
      line-height: 1.15;
    }

    .top-actions {
      display: flex;
      align-items: center;
      gap: 9px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .user-pill {
      display: flex;
      align-items: center;
      gap: 9px;
      background: var(--soft);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 7px 10px;
      font-weight: 800;
      max-width: 240px;
    }

    .avatar {
      width: 28px;
      height: 28px;
      border-radius: 999px;
      background: var(--primary);
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 12px;
      flex: 0 0 auto;
    }

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

    .content {
      padding: 24px;
      max-width: 1480px;
      margin: 0 auto;
      width: 100%;
    }

    .view {
      display: none;
    }

    .view.active {
      display: block;
    }

    .grid {
      display: grid;
      gap: 16px;
    }

    .grid.cards {
      grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .grid.two {
      grid-template-columns: 1.1fr .9fr;
    }

    .card {
      background: var(--panel);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 18px;
    }

    .stat {
      min-height: 132px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .stat-label {
      color: var(--muted);
      font-weight: 900;
      font-size: 13px;
    }

    .stat-value {
      font-size: 34px;
      font-weight: 900;
      margin-top: 10px;
    }

    .stat-foot {
      color: var(--muted);
      font-size: 12px;
      margin-top: 6px;
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }

    .section-title {
      margin: 0;
      font-size: 18px;
    }

    .section-subtitle {
      margin: 4px 0 0;
      color: var(--muted);
      line-height: 1.4;
    }

    .btn {
      border: 0;
      border-radius: 13px;
      padding: 10px 13px;
      background: var(--primary);
      color: #fff;
      font-weight: 900;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 40px;
      white-space: nowrap;
    }

    .btn:hover {
      background: var(--primary-hover);
    }

    .btn.secondary {
      background: #fff;
      color: var(--text);
      border: 1px solid var(--border);
    }

    .btn.secondary:hover {
      background: var(--soft);
    }

    .btn.filter-active {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    .btn.danger {
      background: var(--danger);
    }

    .btn.small {
      min-height: 34px;
      padding: 7px 10px;
      border-radius: 11px;
      font-size: 12px;
    }

    .toolbar {
      display: flex;
      gap: 10px;
      align-items: center;
      flex-wrap: wrap;
      margin-bottom: 14px;
    }

    .field {
      display: grid;
      gap: 6px;
      margin-bottom: 13px;
    }

    .field label {
      font-size: 12px;
      color: var(--muted);
      font-weight: 900;
    }

    .input,
    .select,
    .textarea {
      width: 100%;
      border: 1px solid var(--border);
      background: #fff;
      color: var(--text);
      border-radius: 13px;
      padding: 11px 12px;
      min-height: 42px;
      outline: 0;
      font-size: 14px;
    }

    .textarea {
      min-height: 84px;
      resize: vertical;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 13px;
    }

    .form-grid.three {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .form-actions {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-top: 4px;
    }

    .table-wrap {
      overflow: auto;
      border: 1px solid var(--border);
      border-radius: 16px;
      background: #fff;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      min-width: 720px;
    }

    th,
    td {
      padding: 13px 14px;
      border-bottom: 1px solid var(--border);
      text-align: left;
      vertical-align: top;
    }

    th {
      background: var(--soft);
      color: var(--muted);
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: .05em;
      font-weight: 900;
    }

    tr:last-child td {
      border-bottom: 0;
    }

    .status {
      display: inline-flex;
      align-items: center;
      border-radius: 999px;
      padding: 5px 9px;
      font-size: 12px;
      font-weight: 900;
      background: #e0e7ff;
      color: #3730a3;
    }

    .status.confirmed {
      background: #dcfce7;
      color: #166534;
    }

    .status.cancelled {
      background: #fee2e2;
      color: #991b1b;
    }

    .status.inactive {
      background: #f1f5f9;
      color: #64748b;
    }

    .reservation-filter-toolbar .input {
      min-width: 260px;
      flex: 1 1 320px;
    }

    .reservation-filter-toolbar .select {
      width: auto;
      max-width: 220px;
    }

    .reservation-results-meta {
      margin: -6px 0 14px;
      color: var(--muted);
      font-size: 12px;
      font-weight: 800;
    }

    .reservation-mobile-list {
      display: none;
    }

    .reservation-mobile-card {
      border: 1px solid var(--border);
      border-radius: 16px;
      padding: 14px;
      background: #fff;
      box-shadow: 0 6px 18px rgba(15,23,42,.05);
      display: grid;
      gap: 12px;
    }

    .reservation-mobile-card-head {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: flex-start;
    }

    .reservation-mobile-card-head > div {
      display: grid;
      gap: 5px;
      min-width: 0;
    }

    .reservation-mobile-card-head strong,
    .reservation-mobile-card-head span {
      display: block;
    }

    .reservation-mobile-card-head > div span,
    .reservation-mobile-contact {
      color: var(--muted);
      font-size: 12px;
    }

    .reservation-mobile-contact {
      display: grid;
      gap: 4px;
      overflow-wrap: anywhere;
    }

    .reservation-mobile-card p {
      margin: 0;
      color: var(--text);
      font-size: 13px;
    }

    .reservation-mobile-actions {
      display: flex;
      justify-content: flex-end;
      gap: 8px;
      flex-wrap: wrap;
    }

    .reservation-status-select {
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 7px 9px;
      background: #fff;
      color: var(--text);
      font-size: 12px;
      font-weight: 800;
      max-width: 190px;
    }
    .customer-history-summary {
      margin-top: 6px;
      display: flex;
      gap: 5px;
      flex-wrap: wrap;
      color: var(--muted);
      font-size: 11px;
    }

    .customer-history-summary span {
      background: var(--soft);
      border-radius: 999px;
      padding: 4px 7px;
    }

    .customer-history-summary.period-mode span { display: none; }

    .empty {
      padding: 30px;
      text-align: center;
      color: var(--muted);
      background: #fff;
      border: 1px dashed var(--border);
      border-radius: 16px;
    }

    .alert {
      display: none;
      padding: 12px 14px;
      border-radius: 14px;
      margin-bottom: 14px;
      font-weight: 700;
      line-height: 1.4;
    }

    .alert.show {
      display: block;
    }

    .alert.error {
      color: #991b1b;
      background: #fef2f2;
      border: 1px solid #fecaca;
    }

    .alert.success {
      color: #166534;
      background: #f0fdf4;
      border: 1px solid #bbf7d0;
    }

    .app-toast { position: fixed; right: 20px; bottom: 20px; z-index: 3000; display: flex; align-items: flex-start; gap: 10px; width: min(420px, calc(100vw - 28px)); padding: 13px 14px; border: 1px solid var(--border); border-radius: 14px; background: #fff; box-shadow: 0 18px 50px rgba(15,23,42,.18); opacity: 0; transform: translateY(14px); pointer-events: none; transition: opacity .18s ease, transform .18s ease; }

    .app-toast.show { opacity: 1; transform: translateY(0); pointer-events: auto; }

    .app-toast.success { border-color: #bbf7d0; }

    .app-toast.error { border-color: #fecaca; }

    .app-toast.warning { border-color: #fde68a; background: #fffbeb; }

    .app-toast-message { flex: 1; font-size: 13px; font-weight: 800; line-height: 1.45; }

    .app-toast-close { border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 20px; line-height: 1; }

    .app-confirm-dialog { width: min(460px, calc(100vw - 28px)); padding: 0; border: 0; border-radius: 18px; color: var(--text); box-shadow: 0 24px 70px rgba(15,23,42,.28); }

    .app-confirm-dialog::backdrop { background: rgba(15,23,42,.55); backdrop-filter: blur(3px); }

    .app-confirm-body { padding: 22px; }

    .app-confirm-dialog h2 { margin: 0 0 8px; font-size: 20px; }

    .app-confirm-dialog p { margin: 0; color: var(--muted); line-height: 1.5; }

    .app-confirm-actions { display: flex; justify-content: flex-end; gap: 9px; padding: 0 22px 22px; }


    .quick-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }

    .quick-card {
      border: 1px solid var(--border);
      background: var(--soft);
      border-radius: 16px;
      padding: 14px;
      display: grid;
      gap: 8px;
      cursor: pointer;
      text-align: left;
    }

    .quick-card:hover {
      background: #fff;
      box-shadow: 0 10px 24px rgba(15,23,42,.06);
    }

    .quick-card strong {
      font-size: 14px;
    }

    .quick-card span {
      color: var(--muted);
      font-size: 12px;
      line-height: 1.35;
    }

    .muted {
      color: var(--muted);
    }

    .mobile-menu-btn {
      display: none;
    }

    @media (max-width: 1120px) {
      .grid.cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .grid.two {
        grid-template-columns: 1fr;
      }

      .quick-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 780px) {
      .app,
      body.sidebar-collapsed .app {
        grid-template-columns: 1fr;
      }

      .sidebar {
        position: fixed;
        z-index: 50;
        left: 0;
        top: 0;
        width: 280px;
        transform: translateX(-100%);
        transition: transform .18s ease;
      }

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

      .reservation-filter-toolbar .input,
      .reservation-filter-toolbar .select {
        min-width: 100%;
        width: 100%;
        max-width: none;
      }

      #view-reservations .table-wrap {
        display: none;
      }

      #view-reservations .reservation-mobile-list {
        display: grid;
        gap: 10px;
      }

      body.sidebar-collapsed .brand-text,
      body.sidebar-collapsed .nav-label {
        display: block;
      }

      body.sidebar-collapsed .nav-btn {
        justify-content: flex-start;
        padding: 12px;
      }

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

      .topbar {
        align-items: flex-start;
        flex-direction: column;
        padding: 12px;
        left: 0 !important;
      }

      .top-actions {
        width: 100%;
        justify-content: flex-start;
      }

      .content {
        padding: 14px;
      }

      .grid.cards {
        grid-template-columns: 1fr;
      }

      .form-grid,
      .form-grid.three {
        grid-template-columns: 1fr;
      }
    }