:root {
    --bg: #f4f6f8;
    --sidebar: #111827;
    --sidebar-hover: #1f2937;
    --panel: #ffffff;
    --text: #111827;
    --muted: #6b7280;
    --border: #e5e7eb;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Segoe UI", Arial, sans-serif;
}

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

.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    flex: 0 0 280px;
    display: flex;
    flex-direction: column;
    padding: 24px;
    background: var(--sidebar);
    color: white;
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 35px;
}

.brand-logo {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--primary);
    font-weight: 800;
}

.brand-block h1 {
    margin: 0;
    font-size: 22px;
}

.brand-block p {
    margin: 3px 0 0;
    color: #cbd5e1;
    font-size: 13px;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-menu a {
    display: block;
    padding: 12px 14px;
    border-radius: 10px;
    color: #e5e7eb;
    text-decoration: none;
}

.nav-menu a:hover {
    background: var(--sidebar-hover);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 18px;
    border-top: 1px solid #374151;
    color: #cbd5e1;
    font-size: 13px;
}

.main-content {
    min-width: 0;
    flex: 1;
    padding: 28px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 28px;
    padding: 22px 24px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.topbar h2 {
    margin: 0;
}

.topbar p {
    margin: 5px 0 0;
    color: var(--muted);
}

.topbar-actions {
    display: flex;
    gap: 10px;
}

.primary-button,
.secondary-button,
.danger-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 10px 16px;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.primary-button {
    background: var(--primary);
    color: white;
}

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

.secondary-button {
    background: #eef2ff;
    color: var(--primary);
}

.danger-button {
    background: var(--danger);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(160px, 1fr));
    gap: 18px;
    margin-bottom: 24px;
}

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

.stat-card {
    padding: 20px;
}

.stat-card span {
    display: block;
    margin-bottom: 10px;
    color: var(--muted);
}

.stat-card strong {
    font-size: 30px;
}

.panel {
    margin-bottom: 24px;
    padding: 24px;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

th {
    color: var(--muted);
    font-size: 13px;
}

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

.form-panel {
    max-width: 1100px;
}

.app-form label {
    display: block;
    margin: 12px 0 6px;
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: white;
}

input,
select {
    min-height: 44px;
    padding: 10px 12px;
}

textarea {
    min-height: 110px;
    padding: 12px;
    resize: vertical;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(240px, 1fr));
    gap: 16px;
}

.inventory-toolbar {
    display: grid;
    grid-template-columns: minmax(260px, 1fr) 190px;
    gap: 14px;
    margin-bottom: 22px;
}

.inventory-table {
    min-width: 1150px;
}

.inventory-table td {
    vertical-align: middle;
}

.inventory-item-cell {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 260px;
}

.inventory-thumbnail-link,
.inventory-thumbnail,
.inventory-thumbnail-placeholder {
    width: 64px;
    height: 64px;
    flex: 0 0 64px;
    border-radius: 10px;
}

.inventory-thumbnail {
    display: block;
    object-fit: cover;
}

.inventory-thumbnail-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e5e7eb;
    color: var(--muted);
    font-size: 10px;
    text-align: center;
    text-decoration: none;
}

.inventory-item-info {
    min-width: 0;
}

.inventory-title {
    display: block;
    max-width: 245px;
    overflow: hidden;
    color: var(--text);
    font-weight: 700;
    text-decoration: none;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.inventory-subtitle {
    max-width: 245px;
    margin-top: 5px;
    overflow: hidden;
    color: var(--muted);
    font-size: 12px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sku-code {
    display: inline-block;
    padding: 5px 8px;
    border-radius: 7px;
    background: #f3f4f6;
    font-family: Consolas, monospace;
}

.actions-column {
    position: relative;
    min-width: 220px;
    text-align: right;
}

.inventory-actions {
    position: relative;
    display: flex;
    justify-content: flex-end;
    gap: 6px;
}

.action-button {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: white;
    color: var(--text);
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.action-view {
    background: #eff6ff;
    color: var(--primary);
}

.action-vinted {
    background: #edfafa;
    color: #007782;
}

.row-action-menu {
    display: none;
    position: absolute;
    top: 42px;
    right: 0;
    z-index: 100;
    width: 190px;
    padding: 7px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: white;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.18);
}

.row-action-menu.menu-visible {
    display: block;
}

.row-action-menu form {
    margin: 0;
}

.row-action-menu button {
    display: block;
    width: 100%;
    padding: 10px 11px;
    border: none;
    border-radius: 8px;
    background: transparent;
    text-align: left;
    cursor: pointer;
}

.row-action-menu button:hover {
    background: #f3f4f6;
}

.delete-action {
    color: var(--danger);
}

.actions-divider {
    height: 1px;
    margin: 6px 2px;
    background: var(--border);
}

.success-message {
    margin-bottom: 18px;
    padding: 13px 15px;
    border: 1px solid #86efac;
    border-radius: 11px;
    background: #f0fdf4;
    color: #166534;
}

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 22px;
    background: rgba(15, 23, 42, 0.58);
}

.modal-overlay.modal-visible {
    display: flex;
}

.confirmation-dialog {
    width: 100%;
    max-width: 470px;
    padding: 28px;
    border-radius: 20px;
    background: white;
}

.delete-item-summary {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin: 16px 0;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 11px;
    background: #f8fafc;
}

.confirmation-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 24px;
}

.item-page-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 20px;
}

.item-page-action-buttons {
    display: flex;
    gap: 9px;
}

.item-detail-layout {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 24px;
}

.detail-image,
.detail-placeholder {
    width: 100%;
    height: 360px;
    margin-bottom: 18px;
    border-radius: 14px;
    background: #e5e7eb;
    object-fit: cover;
}

.item-data-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(130px, 1fr));
    gap: 12px;
}

.item-data-field,
.description-box {
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 11px;
    background: #f9fafb;
}

.item-data-field span {
    display: block;
    margin-bottom: 5px;
    color: var(--muted);
    font-size: 12px;
}

.connection-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    gap: 18px;
}

.connection-card {
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: white;
}

.connection-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.badge {
    padding: 6px 10px;
    border-radius: 999px;
    background: #eef2ff;
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
}

.mapping-form {
    padding-bottom: 24px;
}

.mapping-edit-form {
    min-width: 360px;
    padding: 12px 0;
}

.mapping-delete-form {
    margin-top: 12px;
}

.checkbox-row {
    display: flex !important;
    align-items: center;
    gap: 8px;
}

.checkbox-row input {
    width: auto;
    min-height: 0;
}

.help-section {
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}

@media (max-width: 1000px) {
    .app-shell {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        flex-basis: auto;
    }

    .stats-grid,
    .connection-grid,
    .item-detail-layout,
    .form-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 800px) {
    .main-content {
        padding: 18px;
    }

    .inventory-toolbar {
        grid-template-columns: 1fr;
    }

    .item-page-actions {
        flex-direction: column;
        align-items: stretch;
    }
}