:root {
    color-scheme: light;
    font-family: Inter, Segoe UI, Arial, sans-serif;

    /* ─── Design tokens (shared with WPF) ─── */
    --color-primary:        #2563eb;
    --color-primary-dark:   #1d4ed8;
    --color-primary-light:  #dbeafe;
    --color-sidebar-start:  #0f172a;
    --color-sidebar-end:    #1e293b;
    --color-bg:             #f8fafc;
    --color-surface:        #ffffff;
    --color-border:         #e2e8f0;
    --color-border-hover:   #94a3b8;
    --color-text:           #0f172a;
    --color-text-muted:     #475569;
    --color-text-faint:     #64748b;
    --color-success-bg:     #dcfce7;
    --color-success-fg:     #166534;
    --color-success-bd:     #86efac;
    --color-warning-bg:     #fef3c7;
    --color-warning-fg:     #b45309;
    --color-warning-bd:     #fde68a;
    --color-error-bg:       #fee2e2;
    --color-error-fg:       #b91c1c;
    --color-error-bd:       #fca5a5;
    --color-running-bg:     #dbeafe;
    --color-running-fg:     #1d4ed8;
    --radius-card:          1rem;
    --radius-btn:           0.75rem;
    --radius-input:         0.75rem;
    --shadow-card:          0 10px 30px rgba(15, 23, 42, 0.06);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    background: #f8fafc;
    color: #0f172a;
}

body,
.mud-typography,
.mud-button-root,
.mud-input-slot,
.mud-nav-link,
.mud-list-item,
.mud-popover,
.mud-table,
.mud-chip {
    font-family: Inter, Segoe UI, Arial, sans-serif;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

.page-copy {
    color: #475569;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    max-width: 70ch;
}

.eyebrow {
    color: #64748b;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 0.35rem;
    text-transform: uppercase;
}

.card-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    margin-bottom: 1.5rem;
}

.metric-card,
.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    min-width: 0;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.metric-card:hover {
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
    transform: translateY(-2px);
}

.metric-card {
    align-content: start;
    display: grid;
    gap: 0.35rem;
    min-height: 100%;
    padding: 1.25rem;
}

.metric-card span,
.metric-label {
    color: #64748b;
    font-weight: 600;
}

.metric-label {
    font-size: 0.92rem;
    line-height: 1.5;
}

.metric-card strong {
    font-size: 1.8rem;
}

.metric-card-detailed {
    align-items: flex-start;
}

.metric-card-detailed strong {
    font-size: 1.1rem;
}

.metric-card-detailed p {
    margin-bottom: 0;
}

.panel {
    overflow-x: auto;
    padding: 1.5rem;
}

.feature-list {
    display: grid;
    gap: 0.75rem;
    margin: 0;
    padding-left: 1.1rem;
}

.data-table {
    border-collapse: collapse;
    min-width: 42rem;
    width: 100%;
}

.data-table th,
.data-table td {
    border-bottom: 1px solid #e2e8f0;
    padding: 0.9rem 0.75rem;
    text-align: left;
    vertical-align: top;
}

.data-table th {
    background: #f8fafc;
    color: #334155;
    font-size: 0.85rem;
    text-transform: uppercase;
}

.data-table tbody tr:hover {
    background: #f8fafc;
}

.state-pill {
    border-radius: 999px;
    display: inline-flex;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.3rem 0.7rem;
}

.state-running {
    background: #dbeafe;
    color: #1d4ed8;
}

.state-success {
    background: #dcfce7;
    color: #15803d;
}

.state-warning {
    background: #fef3c7;
    color: #b45309;
}

.state-failed {
    background: #fee2e2;
    color: #b91c1c;
}

.markdown-panel {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 1rem 1.25rem;
}

.markdown-panel h1,
.markdown-panel h2,
.markdown-panel h3,
.markdown-panel h4,
.markdown-panel h5,
.markdown-panel h6 {
    margin-top: 0;
}

.shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    color: #f8fafc;
    padding: 2rem 1.5rem;
}

.brand-panel {
    margin-bottom: 2rem;
}

.tagline {
    color: #cbd5e1;
    line-height: 1.5;
}

.main-content {
    background: #f8fafc;
    color: #0f172a;
}

.mud-shell {
    min-height: 100vh;
}

.shell-drawer.mud-drawer {
    background: transparent !important;
    border-right: 0 !important;
    box-shadow: none !important;
}

.shell-drawer .mud-drawer-content {
    height: 100%;
}

.shell-drawer .sidebar {
    height: 100%;
}

.shell-main.mud-main-content {
    margin-top: 0 !important;
    padding-top: 0 !important;
}

.topbar {
    align-items: center;
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    padding: 1.5rem 2rem;
}

.shell-appbar.mud-appbar {
    color: #0f172a !important;
    position: static;
}

.shell-appbar .mud-toolbar-appbar {
    min-height: auto;
    padding: 0;
    width: 100%;
}

.topbar-inner {
    align-items: center;
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    width: 100%;
}

.topbar-heading-group {
    align-items: center;
    display: flex;
    gap: 0.75rem;
    min-width: 0;
}

.topbar-heading-group > div {
    min-width: 0;
}

.drawer-toggle {
    color: #0f172a !important;
    display: none;
}

.topbar-actions {
    align-items: center;
    display: flex;
    gap: 1rem;
}

.user-summary {
    display: grid;
    gap: 0.25rem;
    text-align: right;
}

.user-summary span {
    color: #64748b;
    font-size: 0.85rem;
}

.page-body {
    padding: 2rem;
}

.nav-menu {
    display: grid;
    gap: 0.5rem;
}

.nav-menu a,
.nav-menu .mud-nav-link {
    border-radius: 0.75rem;
    color: #cbd5e1;
    display: block;
    font-weight: 600;
    padding: 0.8rem 1rem;
    text-decoration: none;
}

.nav-menu .mud-nav-link-text {
    color: inherit;
    font-weight: inherit;
}

.nav-menu a.active,
.nav-menu .mud-nav-link.active,
.nav-menu .mud-nav-link.mud-nav-link-active {
    background: rgba(59, 130, 246, 0.2);
    color: #ffffff;
}

.nav-menu a:hover,
.nav-menu .mud-nav-link:hover {
    background: rgba(148, 163, 184, 0.18);
}

.primary-button,
.secondary-button,
.danger-button,
.secondary-link {
    border-radius: 0.75rem;
    display: inline-flex;
    font-weight: 700;
    justify-content: center;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    white-space: nowrap;
}

.primary-button,
.secondary-button,
.danger-button {
    align-items: center;
    border: 0;
    cursor: pointer;
    line-height: 1.2;
    padding: 0.8rem 1rem;
}

.primary-button {
    background: #2563eb;
    color: #ffffff;
}

.primary-button:hover:not(:disabled) {
    background: #1d4ed8;
}

.secondary-button {
    background: #e2e8f0;
    color: #0f172a;
}

.secondary-button:hover:not(:disabled) {
    background: #cbd5e1;
}

.danger-button {
    background: #dc2626;
    color: #ffffff;
}

.danger-button:hover:not(:disabled) {
    background: #b91c1c;
}

.secondary-link {
    color: #2563eb;
    display: inline-flex;
    text-underline-offset: 0.2rem;
}

.secondary-link:hover {
    color: #1d4ed8;
}

.primary-button:disabled,
.secondary-button:disabled,
.danger-button:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

.primary-button:focus-visible,
.secondary-button:focus-visible,
.danger-button:focus-visible,
.secondary-link:focus-visible,
.selector-button:focus-visible,
.nav-menu a:focus-visible,
.text-input:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.25);
    outline-offset: 2px;
}

.login-panel {
    max-width: 460px;
}

.login-form {
    display: grid;
    gap: 0.85rem;
}

.field-label {
    color: #334155;
    font-weight: 700;
}

.text-input {
    border: 1px solid #cbd5e1;
    border-radius: 0.75rem;
    background: #ffffff;
    font-size: 1rem;
    line-height: 1.4;
    padding: 0.8rem 0.9rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    width: 100%;
}

.text-input:hover {
    border-color: #94a3b8;
}

.text-input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
    outline: none;
}

.text-input:disabled {
    background: #f1f5f9;
    color: #94a3b8;
    cursor: not-allowed;
    opacity: 0.7;
}

.text-input::placeholder {
    color: #94a3b8;
    font-style: italic;
    font-weight: 400;
}

.text-input.invalid,
.text-input:invalid:not(:placeholder-shown) {
    border-color: #dc2626;
}

.field-validation {
    color: #dc2626;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.validation-message {
    background: #fee2e2;
    border: 1px solid #fecaca;
    border-radius: 0.75rem;
    color: #b91c1c;
    padding: 0.9rem 1rem;
}
.customer-registry-grid {
    align-items: start;
    display: grid;
    gap: 1.5rem;
    grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
}

.detail-stack {
    display: grid;
    gap: 1.5rem;
}

.detail-stack > * {
    min-width: 0;
}

.panel-header {
    align-items: start;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.panel-copy {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 0;
    max-width: 72ch;
}

.panel-subheading {
    margin: 1.5rem 0 1rem;
}

.status-message {
    border: 1px solid transparent;
    border-radius: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding: 0.9rem 1rem;
}

.status-success {
    background: #dcfce7;
    color: #166534;
    border-color: #86efac;
}

.status-error {
    background: #fee2e2;
    color: #7f1d1d;
    border-color: #fca5a5;
}

.selector-button {
    align-items: flex-start;
    background: transparent;
    border: 0;
    color: #2563eb;
    cursor: pointer;
    display: inline-flex;
    font: inherit;
    font-weight: 700;
    padding: 0;
    text-align: left;
}

.selector-button:hover {
    text-decoration: underline;
}

.selector-button-selected {
    color: #1d4ed8;
    text-decoration: underline;
}

.editor-form {
    display: grid;
    gap: 1rem;
}

.form-grid {
    display: grid;
    gap: 1rem;
}

.form-grid > div,
.filter-grid-5col > div,
.form-field {
    display: grid;
    gap: 0.45rem;
    min-width: 0;
}

.two-column-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.three-column-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.checkbox-row {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    line-height: 1.5;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.field-validation {
    color: #b91c1c;
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 0.35rem;
}

.empty-state {
    color: #475569;
    line-height: 1.6;
    margin-bottom: 0;
}

.environment-form {
    border-top: 1px solid #e2e8f0;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
}

.text-area-input {
    min-height: 9rem;
    resize: vertical;
}

.section-spacing {
    margin-bottom: 1.5rem;
}

.metric-grid-4col {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-grid-auto {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.metric-detail-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-detail-grid > div {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 0.85rem;
    display: grid;
    gap: 0.35rem;
    min-width: 0;
    padding: 0.9rem 1rem;
}

.filter-grid-5col {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.inline-link-row {
    margin: 1rem 0 0;
}

.checkbox-list-panel {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 0.9rem;
    display: grid;
    gap: 0.75rem;
    margin-top: 0.5rem;
    max-height: 18rem;
    overflow-y: auto;
    padding: 1rem;
}

/* ─── Nav section labels ─── */

.nav-section-label {
    color: #64748b;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    margin-bottom: 0.25rem;
    margin-top: 1.5rem;
    padding: 0 0.25rem;
    text-transform: uppercase;
}

.nav-section-label:first-child {
    margin-top: 0;
}

/* ─── Alert / inline notification ─── */

.alert {
    border: 1px solid transparent;
    border-radius: 0.9rem;
    padding: 0.9rem 1rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.5;
}

.alert-info {
    background: var(--color-running-bg);
    border-color: #93c5fd;
    color: var(--color-running-fg);
}

.alert-success {
    background: var(--color-success-bg);
    border-color: var(--color-success-bd);
    color: var(--color-success-fg);
}

.alert-warning {
    background: var(--color-warning-bg);
    border-color: var(--color-warning-bd);
    color: var(--color-warning-fg);
}

.alert-error {
    background: var(--color-error-bg);
    border-color: var(--color-error-bd);
    color: var(--color-error-fg);
}

/* ─── Loading skeleton ─── */

@keyframes skeleton-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.45; }
}

.skeleton {
    animation: skeleton-pulse 1.4s ease-in-out infinite;
    background: #e2e8f0;
    border-radius: 0.5rem;
    display: block;
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
    width: 80%;
}

.skeleton-text-sm {
    height: 0.75rem;
    margin-bottom: 0.4rem;
    width: 55%;
}

.skeleton-card-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    margin-bottom: 1.5rem;
}

.skeleton-card {
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    border-radius: 1rem;
    min-height: 6rem;
    padding: 1.25rem;
}

/* ─── Page header with optional back navigation ─── */

.page-header {
    align-items: flex-start;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header-back {
    align-items: center;
    color: var(--color-primary);
    display: inline-flex;
    font-size: 0.9rem;
    font-weight: 700;
    gap: 0.35rem;
    margin-bottom: 0.4rem;
    text-decoration: none;
}

.page-header-back:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* ─── Login page: brand-accented card ─── */

.login-shell {
    align-items: center;
    display: flex;
    justify-content: center;
    min-height: 80vh;
    padding: 2rem;
}

.login-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 1.25rem;
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.1);
    max-width: 440px;
    overflow: hidden;
    width: 100%;
}

.login-card-brand {
    background: linear-gradient(135deg, var(--color-sidebar-start) 0%, var(--color-sidebar-end) 100%);
    padding: 1.75rem 2rem;
}

.login-card-brand-eyebrow {
    color: #64748b;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    margin-bottom: 0.35rem;
    text-transform: uppercase;
}

.login-card-brand-title {
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
}

.login-card-body {
    padding: 1.75rem 2rem;
}

/* ─── Metric card accent variants ─── */

.metric-card-blue  { border-top: 3px solid var(--color-primary); }
.metric-card-green { border-top: 3px solid #16a34a; }
.metric-card-amber { border-top: 3px solid #d97706; }
.metric-card-red   { border-top: 3px solid #dc2626; }

/* ─── Custom scrollbar (webkit) ─── */

::-webkit-scrollbar {
    height: 6px;
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ─── Metric detail grid field label ─── */

.metric-detail-grid > div small {
    color: var(--color-text-faint);
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
}

/* ─── Help page: accordion ─── */

.help-accordion {
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.help-accordion[open] {
    box-shadow: var(--shadow-card);
}

.help-accordion-header {
    align-items: center;
    cursor: pointer;
    display: flex;
    font-size: 1rem;
    font-weight: 700;
    gap: 0.75rem;
    list-style: none;
    padding: 1rem 1.25rem;
    user-select: none;
}

.help-accordion-header::-webkit-details-marker {
    display: none;
}

.help-accordion-header::after {
    content: '+';
    color: var(--color-text-faint);
    font-size: 1.2rem;
    font-weight: 400;
    margin-left: auto;
    transition: transform 0.2s ease;
}

.help-accordion[open] > .help-accordion-header::after {
    content: '−';
}

.help-accordion-header:hover {
    background: #f8fafc;
}

.help-accordion-body {
    border-top: 1px solid var(--color-border);
    padding: 1.25rem 1.5rem 1.5rem;
}

.help-accordion-body h4 {
    color: var(--color-text);
    font-size: 0.95rem;
    font-weight: 700;
    margin: 1.25rem 0 0.5rem;
}

.help-accordion-body h4:first-child {
    margin-top: 0.25rem;
}

.help-accordion-body p {
    color: var(--color-text-muted);
    line-height: 1.65;
    margin-bottom: 0.75rem;
}

/* ─── Publish release: numbered steps ─── */

.publish-steps {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 0.5rem 0;
}

.publish-step {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.publish-step-number {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    margin-top: 1.5rem;
}

.publish-step-content {
    flex: 1;
    min-width: 0;
}

.publish-step-content .text-input {
    width: 100%;
}

.publish-step-content .text-area-input {
    min-height: 6rem;
    resize: vertical;
}

.field-hint {
    color: var(--color-text-faint);
    font-size: 0.82rem;
    margin: 0.25rem 0 0;
    line-height: 1.45;
}

.field-hint.upload-selected {
    color: var(--color-success-fg);
}

.publish-button {
    font-size: 1rem;
    padding: 0.75rem 2rem;
}

.publish-checklist {
    line-height: 1.8;
}

.manifest-helper {
    background: var(--color-primary-light);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: 1rem 1.1rem;
}

.manifest-helper h3 {
    color: var(--color-text);
    font-size: 1rem;
    margin: 0 0 0.5rem;
}

.manifest-helper .panel-copy {
    margin-bottom: 0.75rem;
}

.manifest-helper code {
    background: rgba(15, 23, 42, 0.06);
    border-radius: 0.4rem;
    color: var(--color-text);
    padding: 0.1rem 0.35rem;
}

.manifest-helper-actions {
    margin-bottom: 0.75rem;
}

/* ─── Help page: step list ─── */

.help-steps {
    color: var(--color-text-muted);
    display: grid;
    gap: 0.55rem;
    line-height: 1.6;
    margin: 0 0 0.75rem;
    padding-left: 1.5rem;
}

.help-steps li {
    padding-left: 0.25rem;
}

.help-steps li strong {
    color: var(--color-text);
}

/* ─── Help page: bullet list ─── */

.help-list {
    color: var(--color-text-muted);
    display: grid;
    gap: 0.5rem;
    line-height: 1.6;
    margin: 0 0 0.75rem;
    padding-left: 1.25rem;
}

.help-list li {
    padding-left: 0.2rem;
}

.help-list li strong {
    color: var(--color-text);
}

/* ─── Help page: section heading ─── */

.help-section-heading {
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    text-transform: uppercase;
}

/* ─── Help page: architecture component cards ─── */

.help-component-card {
    background: #f8fafc;
    border: 1px solid var(--color-border);
    border-radius: 0.85rem;
    display: grid;
    gap: 0.5rem;
    padding: 1rem 1.1rem;
}

.help-component-card strong {
    color: var(--color-text);
    display: block;
    font-size: 0.95rem;
}

.help-component-card p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
    margin: 0;
}

@media (max-width: 900px) {
    .help-accordion-header {
        padding: 0.85rem 1rem;
    }

    .help-accordion-body {
        padding: 1rem 1.1rem 1.25rem;
    }
}

@media (max-width: 1200px) {
    .customer-registry-grid {
        grid-template-columns: 1fr;
    }

    .filter-grid-5col {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

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

@media (max-width: 900px) {
    .drawer-toggle {
        display: inline-flex;
    }

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

    .sidebar {
        padding: 1.25rem 1rem;
    }

    .brand-panel {
        margin-bottom: 1rem;
    }

    .shell-drawer .nav-menu {
        gap: 0.5rem;
        grid-auto-columns: initial;
        grid-auto-flow: row;
        overflow-x: visible;
        padding-bottom: 0;
    }

    .topbar {
        padding: 1.25rem 1rem;
    }

    .page-body {
        padding: 1.25rem 1rem;
    }

    .metric-grid-4col,
    .card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .topbar {
        align-items: flex-start;
        flex-direction: column;
        gap: 1rem;
    }

    .topbar-inner,
    .topbar-heading-group {
        align-items: stretch;
        flex-direction: column;
        width: 100%;
    }

    .topbar-actions {
        align-items: stretch;
        flex-direction: column;
        width: 100%;
    }

    .user-summary {
        text-align: left;
    }

    .panel-header {
        align-items: stretch;
        flex-direction: column;
    }

    .metric-grid-4col,
    .metric-grid-auto,
    .card-grid,
    .metric-detail-grid,
    .filter-grid-5col,
    .two-column-grid,
    .three-column-grid {
        grid-template-columns: 1fr;
    }

    .button-row {
        flex-direction: column;
    }

    .primary-button,
    .secondary-button {
        width: 100%;
    }

    .data-table {
        min-width: 34rem;
    }
}

/* Table row selection highlight */
.data-table tbody tr.table-row-selected {
    background-color: #eff6ff;
    outline: 2px solid #3b82f6;
    outline-offset: -2px;
}

/* Compact action button inside table cells */
.button-compact {
    padding: 0.2rem 0.6rem;
    font-size: 0.8rem;
    white-space: nowrap;
}

/* Stacked checkbox list for multi-environment selection */
.checkbox-stack {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Scrollable multi-environment checkbox list in dialog */
.environment-checkbox-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    max-height: 14rem;
    overflow-y: auto;
    border: 1px solid #e5e7eb;
    border-radius: 0.375rem;
    padding: 0.5rem;
    background: #f9fafb;
}

/* Full-span column in two-column grid */
.two-column-grid .form-grid-full-span {
    grid-column: 1 / -1;
}

/* File input styling */
.file-input {
    display: block;
    font-size: 0.875rem;
    color: #374151;
}

/* Panel subheading inside forms */
.panel-subheading {
    margin-top: 0.25rem;
}

.panel-subheading h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
    margin: 0 0 0.25rem 0;
}

.field-label-row,
.panel-heading-row,
.checkbox-label-row {
    align-items: center;
    display: flex;
    gap: 0.4rem;
}

.panel-heading-row h3 {
    margin: 0;
}

.checkbox-row {
    align-items: flex-start;
}

.checkbox-row input[type="checkbox"] {
    margin-top: 0.2rem;
}

.checkbox-label-row {
    flex: 1 1 auto;
    flex-wrap: wrap;
    line-height: 1.5;
}

.checkbox-label {
    margin: 0;
}

.info-icon-button {
    align-items: center;
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 999px;
    color: #1d4ed8;
    cursor: help;
    display: inline-flex;
    font-size: 0.72rem;
    font-weight: 700;
    height: 1.2rem;
    justify-content: center;
    line-height: 1;
    padding: 0;
    width: 1.2rem;
}

.info-icon-button:hover {
    background: #dbeafe;
    border-color: #93c5fd;
}

.info-icon-button:focus-visible {
    outline: 2px solid #2563eb;
    outline-offset: 2px;
}