.pk-calc-textarea {
        width: 100%;
        min-height: 220px;
        padding: 14px;
        border-radius: 10px;
        background: rgba(0,0,0,0.30) !important;
        border: 1.5px solid rgba(255,255,255,0.12) !important;
        color: var(--pk-fg) !important;
        font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
        font-size: 0.92rem;
        line-height: 1.55;
        resize: vertical;
        box-sizing: border-box;
    }
    .pk-calc-textarea:focus {
        outline: none;
        border-color: var(--calc-accent) !important;
        background: rgba(0,0,0,0.45) !important;
        box-shadow: 0 0 0 4px rgba(92,221,210,0.12);
    }
    .pk-jc__sample {
        appearance: none; cursor: pointer;
        padding: 8px 14px;
        background: rgba(255,255,255,0.04);
        border: 1px solid rgba(255,255,255,0.10);
        border-radius: 999px;
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--pk-fg);
        font-family: inherit;
        transition: all .15s ease;
    }
    .pk-jc__sample:hover {
        border-color: var(--calc-accent);
        background: rgba(92,221,210,0.08);
    }
    .pk-sf__action {
        appearance: none; cursor: pointer;
        padding: 12px 22px;
        background: linear-gradient(135deg, var(--calc-accent), rgba(92,221,210,0.7));
        border: 0;
        border-radius: 10px;
        color: #061218;
        font-weight: 800;
        font-size: 0.95rem;
        font-family: inherit;
        transition: transform .12s ease, box-shadow .15s ease;
        box-shadow: 0 6px 22px rgba(92,221,210,0.20);
    }
    .pk-sf__action:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(92,221,210,0.30); }
    .pk-sf__action[disabled] { opacity: 0.6; cursor: wait; transform: none; }
    .pk-calc-result__head {
        display: flex; align-items: center; justify-content: space-between;
        gap: 12px; margin-bottom: 10px;
    }
    .pk-calc-result__head .pk-calc-result__label { margin: 0; }
    .pk-jf__output {
        margin: 0;
        padding: 16px;
        background: rgba(0,0,0,0.35);
        border: 1px solid rgba(255,255,255,0.08);
        border-radius: 10px;
        font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
        font-size: 0.88rem;
        line-height: 1.55;
        color: var(--pk-fg);
        text-align: left;
        white-space: pre;
        overflow-x: auto;
        max-height: 480px;
        overflow-y: auto;
    }
    .pk-jf__placeholder { color: var(--pk-fg-mut); font-style: italic; }
    .pk-jf__copy {
        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: 6px 12px;
        border-radius: 8px;
        font-size: 0.78rem; font-weight: 700;
        transition: background .12s ease, border-color .12s ease;
    }
    .pk-jf__copy:hover { background: rgba(92,221,210,0.10); border-color: var(--calc-accent); }
    .pk-jf__copy.is-copied { background: rgba(45,190,122,0.20); border-color: #2DBE7A; color: #2DBE7A; }
    .pk-jf__error {
        margin-top: 12px;
        padding: 12px 14px;
        border-radius: 10px;
        background: rgba(255,107,107,0.10);
        border: 1px solid rgba(255,107,107,0.35);
        color: #FFB4B4;
        font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
        font-size: 0.86rem;
        text-align: left;
        line-height: 1.5;
    }