/* Tool page layout & components */
* {
    margin: 0;
    padding: 0;
}

body.tool-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100%;
    overflow-x: clip;
    overflow-y: auto;
    background: var(--bg);
    font-family: var(--font);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    --content-max: min(1440px, 100%);
}

.tool-page .layout {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
    min-width: 0;
    width: 100%;
    max-width: 100%;
    margin: 0;
}

/* Sidebar */
nav#tool-nav {
    background: var(--bg);
    border-right: 1px solid var(--border);
    padding: 1.25rem 0;
    overflow-y: auto;
    position: sticky;
    top: var(--header-h);
    height: calc(100vh - var(--header-h));
    z-index: 20;
}

.sidebar-search {
    padding: 0 1rem 1rem;
}

.sidebar-search input {
    width: 100%;
    padding: 0.5625rem 0.75rem 0.5625rem 2.25rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-family: var(--font);
    color: var(--text);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85zm-5.242 1.156a5 5 0 1 1 0-10 5 5 0 0 1 0 10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 0.625rem center;
}

.sidebar-search input:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.nav-group {
    margin-bottom: 0.5rem;
}

.nav-group.is-hidden {
    display: none;
}

.nav-group-title {
    padding: 0.5rem 1.25rem 0.375rem;
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-subtle);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: calc(100% - 1rem);
    margin: 0 0.5rem;
    padding: 0.5625rem 0.875rem;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s;
    text-decoration: none;
}

.nav-link:hover {
    background: var(--surface-hover);
    color: var(--text);
}

.nav-link.active {
    background: var(--blue-light);
    color: var(--blue-dark);
    font-weight: 600;
    box-shadow: inset 3px 0 0 var(--blue);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.nav-link.is-hidden {
    display: none;
}

.nav-link .icon {
    width: 1.25rem;
    flex-shrink: 0;
}

/* Main workspace */
main.tool-main {
    padding: clamp(1.25rem, 2.5vw, 2rem) clamp(1.25rem, 3vw, 2.5rem) clamp(2.5rem, 5vw, 3.5rem);
    overflow-y: auto;
    background: var(--bg-subtle);
    border-left: 1px solid var(--border);
    min-height: calc(100vh - var(--header-h));
    min-width: 0;
    width: 100%;
    max-width: 100%;
}

.tool-workspace {
    width: 100%;
    max-width: min(1440px, 100%);
    min-width: 0;
}

.tool-header {
    display: flex;
    align-items: flex-start;
    gap: 1.125rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem 1.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.tool-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    pointer-events: none;
}

.tool-header-icon,
.tool-header-text {
    position: relative;
    z-index: 1;
}

.tool-header-text {
    min-width: 0;
    overflow-wrap: break-word;
}

.tool-header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--gradient-soft);
    border: 1px solid rgba(37, 99, 235, 0.12);
    border-radius: var(--radius);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.tool-category-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    margin-bottom: 0.625rem;
    background: var(--blue-light);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--blue-dark);
}

.tool-header-text h1 {
    font-size: clamp(1.375rem, 3vw, 1.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.tool-header-text .description {
    margin-bottom: 0;
    max-width: 920px;
    font-size: 0.9375rem;
    line-height: 1.65;
}

.tool-trust-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tool-trust-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.3125rem 0.6875rem;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
}

.tool-trust-chip .tooltia-icon {
    color: var(--blue);
}

.tool-panel {
    display: none;
    animation: fadeSlide 0.25s ease;
}

.tool-panel.active {
    display: block;
}

@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-panel > h2,
.tool-panel > .description {
    display: none;
}

.tool-panel > .card,
.tool-panel .dynamic-form.card {
    position: relative;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--bg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.tool-panel > .card::before,
.tool-panel .dynamic-form.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient);
    z-index: 1;
}

.tool-panel > .card {
    padding: 1.75rem;
    padding-top: calc(1.75rem + 3px);
}

.tool-form-section + .tool-form-section {
    border-top: 1px solid var(--border);
}

.tool-form-section-head {
    padding: 0.875rem 1.75rem;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-subtle) 100%);
    border-bottom: 1px solid var(--border);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-subtle);
}

.tool-form-body {
    padding: 1.5rem 1.75rem;
}

.tool-form-body .form-group:last-child {
    margin-bottom: 0;
}

.tool-form-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    padding: 1.25rem 1.75rem;
    border-top: 1px solid var(--border);
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-subtle) 100%);
}

.tool-form-actions .btn {
    min-width: 10rem;
}

.tool-form-footer {
    padding: 0 1.75rem 1.75rem;
}

.tool-form-footer .result-box,
.tool-form-footer .alert {
    margin-top: 0;
}

.tool-form-footer .result-box.visible {
    margin-top: 0.5rem;
}

.tool-form-footer .alert.error,
.tool-form-footer .alert.success,
.tool-form-footer .alert.info {
    margin-top: 0.75rem;
}

.tool-form-preview {
    margin-bottom: 0.75rem;
    text-align: center;
}

.tool-form-preview img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.tool-panel > .card .btn {
    margin-top: 0.25rem;
}

.tool-panel > .card .dropzone + .form-group,
.tool-panel > .card .dropzone + fieldset {
    margin-top: 1.25rem;
}

.tool-panel .card + .card,
.tool-panel .dynamic-form.card + .card {
    margin-top: 1rem;
}

.card-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-subtle);
    margin-bottom: 1rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.125rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.4375rem;
    color: var(--text);
}

.form-group label.checkbox-inline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    cursor: pointer;
}

input[type="text"],
input[type="number"],
input[type="password"],
input[type="color"],
input[type="file"],
textarea,
select {
    width: 100%;
    max-width: 100%;
    padding: 0.6875rem 0.875rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.875rem;
    font-family: var(--font);
    transition: border-color 0.15s, box-shadow 0.15s;
}

select {
    cursor: pointer;
    appearance: none;
    padding-right: 2.25rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    min-height: 140px;
    resize: vertical;
    line-height: 1.6;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--blue);
    margin-top: 0.25rem;
}

input[type="color"] {
    width: 4rem;
    height: 2.75rem;
    padding: 0.25rem;
    cursor: pointer;
}

/* Dropzone */
.dropzone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-muted);
    background: var(--bg-subtle);
    overflow-wrap: break-word;
    word-break: break-word;
}

.dropzone::before {
    content: '';
    display: block;
    width: 2.5rem;
    height: 2.5rem;
    margin: 0 auto 0.75rem;
    background-color: var(--text-subtle);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.75'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' x2='12' y1='3' y2='15'/%3E%3C/svg%3E") center / contain no-repeat;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.75'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' x2='12' y1='3' y2='15'/%3E%3C/svg%3E") center / contain no-repeat;
    opacity: 0.55;
}

.dropzone:hover::before,
.dropzone.dragover::before {
    background-color: var(--blue);
    opacity: 0.85;
}

.dropzone.has-file::before {
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / contain no-repeat;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / contain no-repeat;
    background-color: var(--success);
    opacity: 1;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--blue);
    background: var(--blue-light);
    color: var(--text);
}

.dropzone.has-file {
    border-color: var(--success);
    border-style: solid;
    background: var(--success-bg);
}

.dropzone .filename {
    color: var(--success);
    font-weight: 600;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Alerts — light theme */
.alert {
    padding: 0.8125rem 1rem;
    border-radius: var(--radius-sm);
    margin-top: 1rem;
    font-size: 0.8125rem;
    font-weight: 500;
    display: none;
    line-height: 1.5;
}

.alert.error {
    display: block;
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error);
}

.alert.success {
    display: block;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: #15803d;
}

.alert.info {
    display: block;
    background: var(--info-bg);
    border: 1px solid var(--info-border);
    color: var(--blue-dark);
}

/* Results */
.result-box {
    margin-top: 1rem;
    padding: 1rem 1.125rem;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    word-break: break-word;
    white-space: pre-wrap;
    display: none;
    max-height: 400px;
    overflow-y: auto;
}

.result-box.visible {
    display: block;
}

.range-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.range-value {
    min-width: 2.5rem;
    text-align: center;
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--blue);
}

/* Anonymizer canvas */
.canvas-container {
    position: relative;
    margin: 1rem 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #0f172a;
    display: none;
}

.canvas-container.visible {
    display: block;
}

#anonymize-canvas {
    display: block;
    max-width: 100%;
    cursor: crosshair;
}

.canvas-toolbar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.stats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    margin-top: 0.875rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.stats span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.file-list {
    list-style: none;
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-subtle);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.file-list li {
    padding: 0.3125rem 0;
    font-size: 0.8125rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.file-list li::before {
    content: '•';
    color: var(--blue);
}

/* Fieldsets */
.options-fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin: 0;
    background: var(--bg-subtle);
}

.options-fieldset legend {
    padding: 0 0.5rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-muted);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(200px, 100%), 1fr));
    gap: 0.5rem;
}

.options-grid .checkbox-row {
    font-size: 0.8125rem;
    color: var(--text);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-row input {
    width: auto;
    accent-color: var(--blue);
}

.field-hint {
    margin-top: 0.375rem;
    font-size: 0.75rem;
    color: var(--text-subtle);
    line-height: 1.5;
}

/* Empty state */
.empty-state-card {
    text-align: center;
    max-width: 420px;
    margin: 2rem auto;
    padding: 2.5rem 2rem !important;
}

.empty-state-card h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
}

.empty-state-card p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.empty-state-card .btn {
    margin-top: 1.25rem;
}

/* Document anonymizer */
.doc-anon-tabs {
    display: flex;
    gap: 0.375rem;
    margin-bottom: 1.25rem;
    padding: 0.25rem;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-width: 100%;
}

.doc-anon-tab {
    flex: 1;
    padding: 0.625rem 1rem;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.doc-anon-tab.is-active {
    background: var(--bg);
    color: var(--blue-dark);
    box-shadow: var(--shadow-sm);
}

.doc-anon-pane {
    display: none;
}

.doc-anon-pane.is-active {
    display: block;
}

.doc-anon-card {
    padding: 0;
    overflow: hidden;
}

.doc-anon-option-groups {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.doc-anon-fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.125rem;
    margin: 0;
    background: var(--bg-subtle);
}

.doc-anon-fieldset legend {
    padding: 0 0.375rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

.doc-anon-audit-box {
    margin-top: 1.25rem;
    padding: 1rem 1.125rem;
    background: var(--info-bg);
    border: 1px solid var(--info-border);
    border-radius: var(--radius);
}

.doc-anon-audit-toggle {
    align-items: flex-start;
    gap: 0.625rem;
}

.doc-anon-audit-toggle strong {
    display: block;
    font-size: 0.875rem;
    color: var(--text);
    margin-bottom: 0.25rem;
}

.doc-anon-audit-toggle .field-hint {
    margin-top: 0;
}

.doc-anon-summary {
    padding: 1rem 1.125rem;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
}

.doc-anon-summary-head strong {
    display: block;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    color: #15803d;
}

.doc-anon-summary-head p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0 0 0.875rem;
    line-height: 1.5;
}

.doc-anon-summary-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.doc-anon-stat-card {
    padding: 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-align: center;
}

.doc-anon-stat-value {
    display: block;
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--blue);
    line-height: 1.2;
}

.doc-anon-stat-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.doc-anon-type-list {
    list-style: none;
    margin: 0;
    padding: 0;
    border-top: 1px solid var(--success-border);
    padding-top: 0.625rem;
}

.doc-anon-type-list li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.3125rem 0;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.doc-anon-stat-type {
    font-weight: 600;
    color: var(--text);
    text-transform: capitalize;
}

.doc-anon-restore-intro {
    margin: 0;
    padding: 1.25rem 1.75rem 0;
}

.dropzone-compact {
    padding: 1.25rem 1rem;
}

.dropzone-compact::before {
    width: 1.75rem;
    height: 1.75rem;
    margin-bottom: 0.5rem;
}

/* Image anonymizer */
.img-anon-card {
    padding: 0;
    overflow: hidden;
}

.img-anon-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.img-anon-face-status {
    margin-top: 0.75rem;
    margin-bottom: 0;
}

.avatar-picker {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
    gap: 0.625rem;
}

.avatar-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    padding: 0.625rem 0.375rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-subtle);
    cursor: pointer;
    text-align: center;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.avatar-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.avatar-option:has(input:checked) {
    border-color: var(--blue);
    background: var(--blue-light);
    color: var(--blue-dark);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.avatar-swatch {
    display: block;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.85);
    box-shadow: var(--shadow-sm);
    background: var(--blue);
}

.avatar-swatch[data-style="neutral"] { background: linear-gradient(135deg, #6366f1, #4338ca); }
.avatar-swatch[data-style="warm"] { background: linear-gradient(135deg, #f97316, #c2410c); }
.avatar-swatch[data-style="cool"] { background: linear-gradient(135deg, #0ea5e9, #0369a1); }
.avatar-swatch[data-style="mint"] { background: linear-gradient(135deg, #10b981, #047857); }
.avatar-swatch[data-style="robot"] { background: linear-gradient(135deg, #64748b, #334155); }
.avatar-swatch[data-style="anonymous"] { background: linear-gradient(135deg, #1e293b, #0f172a); }
.avatar-swatch-random {
    background: conic-gradient(from 180deg, #6366f1, #10b981, #f97316, #0ea5e9, #6366f1);
}

.tool-panel .img-anon-card .canvas-container.visible {
    display: block;
}

.tool-panel .canvas-container {
    max-width: 100%;
}

.tool-panel #anonymize-canvas {
    max-width: 100%;
    height: auto;
}

@media (max-width: 768px) {
    .img-anon-form-row {
        grid-template-columns: 1fr;
    }
}

/* Mobile sidebar toggle */
.sidebar-toggle {
    display: none;
    align-items: center;
    gap: 0.375rem;
    padding: 0.4375rem 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: var(--font);
    cursor: pointer;
    color: var(--text);
}

@media (min-width: 961px) {
    .tool-page .layout {
        grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
    }
}

@media (max-width: 960px) {
    .tool-page .header-nav {
        display: none;
    }

    main.tool-main {
        border-left: none;
        min-height: auto;
        max-width: 100%;
    }

    .sidebar-toggle {
        display: inline-flex;
        flex-shrink: 0;
        padding: 0.4375rem 0.625rem;
    }

    .sidebar-toggle span {
        display: none;
    }

    nav#tool-nav {
        display: none;
        position: fixed;
        top: var(--header-h);
        left: 0;
        bottom: 0;
        width: min(var(--sidebar-w), 85vw);
        z-index: 150;
        height: auto;
        box-shadow: var(--shadow-lg);
    }

    nav#tool-nav.is-open {
        display: block;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        top: var(--header-h);
        background: rgba(15, 23, 42, 0.4);
        z-index: 140;
    }

    .sidebar-overlay.is-open {
        display: block;
    }

    main.tool-main {
        padding: 1.25rem 1rem 2.5rem;
    }

    .tool-header {
        flex-direction: row;
        gap: 1rem;
        padding: 1.25rem 1.125rem;
    }

    .tool-header-icon {
        width: 48px;
        height: 48px;
    }

    .tool-form-body,
    .tool-form-actions,
    .tool-form-footer {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .tool-form-section-head {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .tool-form-actions .btn {
        width: 100%;
    }

    .tool-panel > .card {
        padding: 1.25rem;
        padding-top: calc(1.25rem + 3px);
    }

    .tool-panel > .card > .btn,
    .tool-panel .btn-row .btn {
        width: 100%;
    }

    .tool-panel .btn-row {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .tool-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.875rem;
        padding: 1.125rem 1rem;
    }

    .tool-header-icon {
        width: 44px;
        height: 44px;
    }

    .tool-trust-chip {
        padding: 0.25rem 0.5rem;
        font-size: 0.625rem;
    }
}

/* RTL */
[dir="rtl"] .tool-page .layout {
    direction: rtl;
}

[dir="rtl"] nav#tool-nav {
    border-right: none;
    border-left: 1px solid var(--border);
}

[dir="rtl"] .nav-link.active {
    box-shadow: inset -3px 0 0 var(--blue);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

[dir="rtl"] .header-inner {
    flex-direction: row-reverse;
}

[dir="rtl"] .tool-header {
    flex-direction: row-reverse;
    text-align: right;
}

@media (max-width: 480px) {
    [dir="rtl"] .tool-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

[dir="rtl"] .tool-trust-row {
    justify-content: flex-end;
}

[dir="rtl"] .stats,
[dir="rtl"] .canvas-toolbar,
[dir="rtl"] .range-row {
    flex-direction: row-reverse;
}