.isoblok-calculator {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 24px;
    margin: 20px 0;
    font-family: inherit;
}
.isoblok-calc-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #dee2e6;
}
.isoblok-inputs {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    margin-bottom: 16px;
}
.isoblok-input-group {
    width: calc(50% - 20px);
    flex-shrink: 0;
}
.isoblok-input-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #495057;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.isoblok-stepper {
    display: flex;
    align-items: center;
    border: 2px solid #ced4da;
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
    transition: border-color 0.15s;
}
.isoblok-stepper:focus-within {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.isoblok-step-btn {
    background: #f1f3f5;
    border: none;
    width: 40px;
    height: 44px;
    font-size: 20px;
    cursor: pointer;
    color: #495057;
    transition: background 0.15s;
    flex-shrink: 0;
    line-height: 1;
    padding: 0;
}
.isoblok-step-btn:hover { background: #e9ecef; }
.isoblok-stepper input[type="number"] {
    border: none !important;
    box-shadow: none !important;
    outline: none !important;
    text-align: center;
    font-size: 18px;
    font-weight: 700;
    width: 100%;
    height: 44px;
    padding: 0 4px;
    background: transparent;
    color: #1a1a1a;
    -moz-appearance: textfield;
}
.isoblok-stepper input[type="number"]::-webkit-outer-spin-button,
.isoblok-stepper input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
.isoblok-equals {
    font-size: 24px;
    font-weight: 300;
    color: #adb5bd;
    padding-bottom: 10px;
    align-self: flex-end;
}
.isoblok-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}
.isoblok-checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: #495057;
    user-select: none;
}
.isoblok-checkbox-label input[type="checkbox"] {
    display: none;
}
.isoblok-checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #ced4da;
    border-radius: 4px;
    background: #fff;
    flex-shrink: 0;
    position: relative;
    transition: all 0.15s;
}
.isoblok-checkbox-label input:checked + .isoblok-checkmark {
    background: #2563eb;
    border-color: #2563eb;
}
.isoblok-checkbox-label input:checked + .isoblok-checkmark::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: 2px solid #fff;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
}
.isoblok-lijm-hint {
    color: #868e96;
    font-size: 13px;
    font-weight: 400;
}
.isoblok-results {
    background: #fff;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
}
.isoblok-result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-size: 15px;
}
.isoblok-result-label { color: #495057; }
.isoblok-result-value { font-weight: 600; color: #1a1a1a; }
.isoblok-pallet-info {
    font-size: 13px;
    color: #868e96;
    font-weight: 400;
    margin-left: 4px;
}
.isoblok-sub {
    font-size: 13px;
    color: #868e96;
    font-weight: 400;
    margin-left: 4px;
}
.isoblok-result-divider {
    border-top: 1px solid #e9ecef;
    margin: 8px 0;
}
.isoblok-total .isoblok-result-label {
    font-weight: 700;
    font-size: 16px;
    color: #1a1a1a;
}
.isoblok-total .isoblok-result-value {
    font-size: 22px;
    color: #2563eb;
    font-weight: 800;
}
.isoblok-cart-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    background: #2563eb;
    color: #fff !important;
    border: none;
    border-radius: 8px;
    padding: 14px 20px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    letter-spacing: 0.3px;
    text-decoration: none;
}
.isoblok-cart-btn:hover { background: #1d4ed8; }
.isoblok-cart-btn:active { transform: scale(0.98); }
.isoblok-cart-btn:disabled { background: #93c5fd; cursor: not-allowed; }
.isoblok-feedback {
    margin-top: 12px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
}
.isoblok-feedback.success { background: #d1fae5; color: #065f46; }
.isoblok-feedback.error   { background: #fee2e2; color: #991b1b; }
.isoblok-feedback a { color: inherit; text-decoration: underline; }

@media (max-width: 600px) {
    .isoblok-calculator { padding: 16px; }
    .isoblok-inputs { gap: 6px; flex-wrap: nowrap; }
    .isoblok-input-group label { font-size: 11px; }
    .isoblok-stepper input[type="number"] { font-size: 15px; }
    .isoblok-step-btn { width: 32px; height: 38px; font-size: 16px; }
    .isoblok-stepper { border-radius: 6px; }
    .isoblok-equals { font-size: 16px; padding-bottom: 6px; }
    .isoblok-checkbox-label { font-size: 13px; align-items: flex-start; }
    .isoblok-lijm-hint { display: block; margin-left: 30px; font-size: 11px; }
    .isoblok-hint { display: none; }
    .isoblok-result-row { font-size: 13px; }
    .isoblok-total .isoblok-result-value { font-size: 18px; }
    .isoblok-cart-btn { font-size: 14px; padding: 12px 16px; }
    .isoblok-lijm-detail { font-size: 11px; }
}

/* Lijm detail */
.isoblok-lijm-detail {
    font-size: 12px;
    color: #868e96;
    padding: 2px 0 6px 0;
    line-height: 1.5;
}
#res-lijm-breuk {
    display: block;
    color: #f59e0b;
    font-weight: 600;
}

/* Hint tekst */
.isoblok-hint {
    font-size: 12px;
    color: #868e96;
    font-weight: 400;
}

/* Extra rij: gewicht + volume */
.isoblok-extra-row {
    display: flex;
    gap: 16px;
    padding-top: 10px;
    margin-top: 4px;
    border-top: 1px dashed #e9ecef;
    flex-wrap: wrap;
}
.isoblok-extra-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: #868e96;
}
.isoblok-extra-item svg {
    opacity: 0.5;
    flex-shrink: 0;
}
.isoblok-extra-item strong {
    color: #495057;
}