.pk-ce-grid {
        display: grid;
        gap: 20px;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        margin: 16px 0;
    }
    @media (max-width: 720px) {
        .pk-ce-grid { grid-template-columns: 1fr; }
    }
    .pk-ce-svg-wrap {
        background: rgba(0,0,0,0.20);
        border: 1px solid rgba(255,255,255,0.10);
        border-radius: 12px;
        padding: 8px;
    }
    #ce-svg { width: 100%; height: auto; display: block; touch-action: none; user-select: none; }
    .pk-ce-controls {
        display: flex; flex-direction: column; gap: 12px;
    }
    .pk-ce-input-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
    .pk-ce-input-row label {
        flex: 1;
        display: flex; align-items: center; gap: 8px;
        color: var(--pk-fg);
        font-weight: 600; font-size: 0.85rem;
    }
    .pk-ce-input-row input, .pk-ce-input-row select {
        flex: 1;
        padding: 8px 10px;
        background: rgba(0,0,0,0.30);
        border: 1.5px solid rgba(255,255,255,0.12);
        border-radius: 8px;
        color: var(--pk-fg);
        font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
        font-size: 0.88rem;
        box-sizing: border-box;
    }
    .pk-ce-preview {
        padding: 14px;
        background: rgba(0,0,0,0.20);
        border: 1px solid rgba(255,255,255,0.08);
        border-radius: 10px;
    }
    .pk-ce-track {
        position: relative;
        height: 60px;
        background: linear-gradient(90deg, rgba(92,221,210,0.04), rgba(45,45,190,0.06));
        border: 1px dashed rgba(255,255,255,0.12);
        border-radius: 10px;
        overflow: hidden;
    }
    .pk-ce-ball {
        position: absolute;
        top: 50%; left: 8px;
        width: 36px; height: 36px;
        margin-top: -18px;
        border-radius: 999px;
        background: linear-gradient(135deg, var(--calc-accent-2), var(--calc-accent));
        box-shadow: 0 6px 16px rgba(92,221,210,0.30);
    }
    .pk-cc-code {
        margin: 8px 0 0;
        padding: 14px 16px;
        background: rgba(0,0,0,0.40);
        border: 1px solid rgba(255,255,255,0.10);
        border-radius: 10px;
        color: var(--calc-accent);
        font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
        font-size: 0.92rem;
        overflow-x: auto;
        white-space: pre-wrap;
        word-break: break-word;
        text-align: left;
    }
    .pk-btn {
        appearance: none; cursor: pointer;
        background: rgba(255,255,255,0.06);
        border: 1px solid rgba(255,255,255,0.12);
        color: var(--pk-fg);
        padding: 10px 16px;
        border-radius: 10px;
        font-weight: 700; font-size: 0.85rem;
        display: inline-flex; align-items: center; gap: 8px;
    }
    .pk-btn--primary {
        background: linear-gradient(135deg, var(--calc-accent-2), var(--calc-accent));
        color: #04102B; border-color: transparent;
    }
    .pk-btn.is-copied { background: rgba(45,190,122,0.20); border-color: #2DBE7A; color: #2DBE7A; }
    .pk-calc-chips#ce-presets { max-height: 180px; overflow-y: auto; }