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

.page-tool--css-transition-builder .ctb-studio {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 16px;
    align-items: start;
}

.page-tool--css-transition-builder .ctb-presets {
    grid-column: 1 / -1;
}

.page-tool--css-transition-builder .ctb-visual {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
}

.page-tool--css-transition-builder .ctb-controls,
.page-tool--css-transition-builder .ctb-preview,
.page-tool--css-transition-builder .ctb-output {
    min-width: 0;
}

.page-tool--css-transition-builder .ctb-presets__actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-tool--css-transition-builder .ctb-presets__body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.page-tool--css-transition-builder .ctb-preset-groups {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.page-tool--css-transition-builder .ctb-preset-group__title {
    margin: 0 0 8px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--faint);
}

.page-tool--css-transition-builder .ctb-preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 8px;
}

.page-tool--css-transition-builder .ctb-preset {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    padding: 10px 12px;
    border: 1px solid var(--line-2);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--ink);
    font: inherit;
    text-align: left;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.page-tool--css-transition-builder .ctb-preset:hover {
    border-color: var(--accent);
    background: var(--surface-2);
}

.page-tool--css-transition-builder .ctb-preset:focus-visible {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.page-tool--css-transition-builder .ctb-preset[aria-pressed="true"] {
    border-color: var(--accent);
    background: var(--accent-soft);
    box-shadow: inset 3px 0 0 0 var(--accent);
}

.page-tool--css-transition-builder .ctb-preset__label {
    font-size: 0.88rem;
    font-weight: 600;
}

.page-tool--css-transition-builder .ctb-preset[aria-pressed="true"] .ctb-preset__label {
    color: var(--accent);
}

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

.page-tool--css-transition-builder .ctb-controls__actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-tool--css-transition-builder .ctb-controls__body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tool--css-transition-builder .ctb-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.8rem;
}

.page-tool--css-transition-builder .ctb-hint code {
    padding: 0.05rem 0.35rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

.page-tool--css-transition-builder .ctb-hint--note {
    padding-top: 12px;
    border-top: 1px solid var(--line);
}

.page-tool--css-transition-builder .ctb-rows {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tool--css-transition-builder .ctb-row {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr) minmax(0, 0.9fr) minmax(0, 1.4fr) auto;
    gap: 10px;
    align-items: start;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-2);
}

.page-tool--css-transition-builder .ctb-row--from-preset {
    border-left: 3px solid var(--accent);
}

.page-tool--css-transition-builder .ctb-row__field {
    min-width: 0;
}

.page-tool--css-transition-builder .ctb-row__actions {
    display: flex;
    align-items: flex-end;
    align-self: stretch;
    padding-top: 22px;
}

.page-tool--css-transition-builder .ctb-row__custom {
    margin-top: 7px;
}

.page-tool--css-transition-builder .ctb-row__error {
    margin: 0;
    min-height: 1.05em;
    color: var(--danger);
    font-size: 0.72rem;
    line-height: 1.25;
}

.page-tool--css-transition-builder .ctb-row__error:empty {
    min-height: 0;
}

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

.page-tool--css-transition-builder .is-invalid:focus {
    box-shadow: 0 0 0 3px var(--danger-soft);
}

.page-tool--css-transition-builder .ctb-preview__body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.page-tool--css-transition-builder .ctb-trigger {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 26px 24px;
    border: 2px solid var(--accent);
    border-radius: var(--radius);
    background: var(--accent);
    color: var(--accent-fg);
    font: inherit;
    cursor: pointer;
    box-shadow: 0 12px 26px -14px var(--accent);
    transition: transform 0.12s ease, background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.page-tool--css-transition-builder .ctb-trigger:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.page-tool--css-transition-builder .ctb-trigger:active {
    transform: translateY(2px);
}

.page-tool--css-transition-builder .ctb-trigger:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px var(--accent-soft), 0 12px 26px -14px var(--accent);
}

.page-tool--css-transition-builder .ctb-trigger[aria-pressed="true"] {
    background: var(--surface);
    color: var(--ink);
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

.page-tool--css-transition-builder .ctb-trigger__row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.page-tool--css-transition-builder .ctb-trigger__icon {
    flex: 0 0 auto;
    width: 0;
    height: 0;
    border-top: 9px solid transparent;
    border-bottom: 9px solid transparent;
    border-left: 15px solid currentColor;
}

.page-tool--css-transition-builder .ctb-trigger[aria-pressed="true"] .ctb-trigger__icon {
    width: 15px;
    height: 15px;
    border: 0;
    border-radius: 2px;
    background: currentColor;
}

.page-tool--css-transition-builder .ctb-trigger__label {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.page-tool--css-transition-builder .ctb-trigger__hint {
    font-size: 0.82rem;
    opacity: 0.85;
}

.page-tool--css-transition-builder .ctb-stage {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 22rem;
    padding: 3rem 2rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-2);
    overflow: hidden;
}

.page-tool--css-transition-builder .ctb-demo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 14rem;
    height: 9rem;
    padding: 1.25rem 1.75rem;
    border: 1px solid var(--line-2);
    border-radius: 14px;
    background: var(--surface);
    color: var(--ink);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    box-shadow: 0 0 0 0 rgba(94, 106, 210, 0);
}

.page-tool--css-transition-builder .ctb-output__body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tool--css-transition-builder .ctb-output__selector {
    max-width: 24rem;
}

.page-tool--css-transition-builder .ctb-status {
    margin: 0;
}

.page-tool--css-transition-builder .ctb-code {
    margin: 0;
    max-height: 14rem;
    overflow: auto;
    white-space: pre;
}

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

.page-tool--css-transition-builder .ctb-about__text {
    max-width: 80ch;
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.page-tool--css-transition-builder .ctb-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: 1024px) {
    .page-tool--css-transition-builder .ctb-studio {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .page-tool--css-transition-builder .ctb-row {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    .page-tool--css-transition-builder .ctb-row__field--property {
        grid-column: 1 / -1;
    }

    .page-tool--css-transition-builder .ctb-row__actions {
        grid-column: 1 / -1;
        align-self: auto;
        padding-top: 0;
    }
}