.page-tool--css-animation-builder .tool-page {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.page-tool--css-animation-builder .cab-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.82rem;
}

.page-tool--css-animation-builder .cab-hint code {
    padding: 0.05rem 0.3rem;
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

.page-tool--css-animation-builder .cab-hint--note {
    padding-top: 2px;
    color: var(--faint);
    font-size: 0.78rem;
}

/* Presets */
.page-tool--css-animation-builder .cab-presets__body {
    padding-top: 4px;
}

.page-tool--css-animation-builder .cab-presets__groups {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.page-tool--css-animation-builder .cab-preset-group__title {
    margin: 0 0 8px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--faint);
}

.page-tool--css-animation-builder .cab-preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
}

.page-tool--css-animation-builder .cab-preset {
    display: flex;
    flex-direction: column;
    gap: 2px;
    align-items: flex-start;
    padding: 9px 11px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    color: var(--ink);
    font: inherit;
    font-size: 0.84rem;
    text-align: left;
    cursor: pointer;
}

.page-tool--css-animation-builder .cab-preset:hover,
.page-tool--css-animation-builder .cab-preset:focus-visible {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.page-tool--css-animation-builder .cab-preset__meta {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.68rem;
}

/* Studio */
.page-tool--css-animation-builder .cab-studio {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}

.page-tool--css-animation-builder .cab-editor,
.page-tool--css-animation-builder .cab-visual {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
}

.page-tool--css-animation-builder .cab-preview {
    position: sticky;
    top: calc(var(--header-h) + 16px);
}

.page-tool--css-animation-builder .cab-keyframes__actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-tool--css-animation-builder .cab-keyframes__body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* Timeline */
.page-tool--css-animation-builder .cab-timeline {
    position: relative;
    height: 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: linear-gradient(90deg, var(--surface-2), var(--surface-3));
}

.page-tool--css-animation-builder .cab-timeline__marker {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.1rem;
    height: 1.35rem;
    padding: 0 4px;
    border: 1px solid var(--accent-line);
    border-radius: 999px;
    background: var(--surface);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    white-space: nowrap;
}

/* Steps */
.page-tool--css-animation-builder .cab-steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tool--css-animation-builder .cab-step {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-2);
    overflow: hidden;
}

.page-tool--css-animation-builder .cab-step.is-invalid {
    border-color: var(--danger);
}

.page-tool--css-animation-builder .cab-step__head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 14px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
}

.page-tool--css-animation-builder .cab-step__title {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.page-tool--css-animation-builder .cab-step__offset {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1 1 220px;
    min-width: 0;
}

.page-tool--css-animation-builder .cab-step__offset input[type="range"] {
    flex: 1 1 auto;
    min-width: 0;
    height: 1.5rem;
    margin: 0;
    accent-color: var(--accent);
    cursor: pointer;
}

.page-tool--css-animation-builder .cab-step__offset output {
    flex: 0 0 3.2rem;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--ink-2);
    font-variant-numeric: tabular-nums;
}

.page-tool--css-animation-builder .cab-step__remove {
    margin-left: auto;
}

.page-tool--css-animation-builder .cab-step__error {
    margin: 0;
    padding: 8px 12px;
    background: var(--danger-soft);
    color: var(--danger);
    font-size: 0.78rem;
}

.page-tool--css-animation-builder .cab-step__error:empty {
    display: none;
}

.page-tool--css-animation-builder .cab-channels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px 16px;
    padding: 14px 12px;
}

.page-tool--css-animation-builder .cab-channel {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.page-tool--css-animation-builder .cab-channel__label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    cursor: pointer;
}

.page-tool--css-animation-builder .cab-channel__label input {
    accent-color: var(--accent);
}

.page-tool--css-animation-builder .cab-channel__label.is-active {
    color: var(--accent);
}

.page-tool--css-animation-builder .cab-channel__body {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-tool--css-animation-builder .cab-channel__body[hidden] {
    display: none;
}

.page-tool--css-animation-builder .cab-channel__range {
    flex: 1 1 auto;
    min-width: 0;
    height: 1.5rem;
    margin: 0;
    accent-color: var(--accent);
    cursor: pointer;
}

.page-tool--css-animation-builder .cab-channel__value {
    flex: 0 0 3.6rem;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.76rem;
    color: var(--ink-2);
    font-variant-numeric: tabular-nums;
}

.page-tool--css-animation-builder .cab-channel__color {
    width: 100%;
    height: 2rem;
    padding: 2px;
    border: 1px solid var(--line);
    border-radius: var(--radius-xs);
    background: var(--surface);
    cursor: pointer;
}

/* Settings */
.page-tool--css-animation-builder .cab-settings__body {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 16px;
}

.page-tool--css-animation-builder .cab-field {
    min-width: 0;
}

.page-tool--css-animation-builder .cab-field__error {
    margin: 4px 0 0;
    color: var(--danger);
    font-size: 0.74rem;
}

.page-tool--css-animation-builder .cab-field__error:empty {
    display: none;
}

.page-tool--css-animation-builder .input.is-invalid,
.page-tool--css-animation-builder .select.is-invalid,
.page-tool--css-animation-builder .cab-channel__range.is-invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px var(--danger-soft);
}

/* Preview */
.page-tool--css-animation-builder .cab-preview__body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tool--css-animation-builder .cab-stage {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 15rem;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background:
        radial-gradient(circle at 1px 1px, var(--line) 1px, transparent 0) 0 0 / 18px 18px,
        var(--surface-2);
    overflow: hidden;
}

.page-tool--css-animation-builder .cab-demo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 8.5rem;
    height: 8.5rem;
    border-radius: var(--radius);
    background: var(--accent);
    color: var(--accent-fg);
    font-weight: 600;
    box-shadow: var(--shadow-md, 0 12px 24px -12px rgba(15, 23, 42, 0.4));
}

.page-tool--css-animation-builder .cab-demo__label {
    font-size: 0.82rem;
    letter-spacing: 0.02em;
}

.page-tool--css-animation-builder .cab-preview__actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.page-tool--css-animation-builder .cab-preview__actions .cab-hint {
    flex: 1 1 12rem;
}

/* Output */
.page-tool--css-animation-builder .cab-output__body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tool--css-animation-builder .cab-status {
    min-height: 1.2rem;
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.page-tool--css-animation-builder .cab-status:empty {
    display: none;
}

.page-tool--css-animation-builder .cab-code {
    max-height: 22rem;
}

.page-tool--css-animation-builder .cab-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.page-tool--css-animation-builder .cab-about__text {
    max-width: 82ch;
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.page-tool--css-animation-builder .cab-about__text code {
    padding: 0.05rem 0.3rem;
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

@media (max-width: 960px) {
    .page-tool--css-animation-builder .cab-studio {
        grid-template-columns: 1fr;
    }

    .page-tool--css-animation-builder .cab-preview {
        position: static;
    }
}

@media (max-width: 640px) {
    .page-tool--css-animation-builder .cab-settings__body {
        grid-template-columns: 1fr;
    }

    .page-tool--css-animation-builder .cab-step__offset {
        flex: 1 1 100%;
    }

    .page-tool--css-animation-builder .cab-step__remove {
        margin-left: 0;
    }
}