.calc-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.calc-col {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.calc-block {
    background: var(--color-bg-card);
    border: 1px solid rgba(90, 154, 74, 0.15);
    border-radius: 8px;
    padding: 1.25rem;
}

.info-block {
    background: var(--color-bg-elevated);
    border-color: rgba(90, 154, 74, 0.25);
}

.result-block {
    border-color: rgba(90, 154, 74, 0.4);
}

.block-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.block-subtitle {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin: 0 0 1rem 0;
    line-height: 1.5;
}

/* Material radio buttons */
.material-options {
    display: flex;
    gap: 1rem;
    align-items: stretch;
}

.material-option {
    cursor: pointer;
    flex: 1;
    display: flex;
}

.material-option input[type="radio"] {
    display: none;
}

.material-btn {
    border: 2px solid var(--color-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    text-align: center;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    transition: border-color 0.2s ease, color 0.2s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
}

.material-note {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
    display: block;
}

.material-option input[type="radio"]:checked + .material-btn {
    border-color: var(--color-primary);
    color: var(--color-primary);
    font-weight: 500;
}

.material-option input[type="radio"]:checked + .material-btn .material-note {
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* Number input */
.calc-input {
    width: 100%;
    padding: 0.65rem 0.75rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    font-family: inherit;
    font-size: 1.1rem;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

.calc-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(90, 154, 74, 0.2);
}

/* Slider */
.slider-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.slider-value {
    display: inline-block;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 0.25rem 0.6rem;
    font-size: 0.95rem;
    color: var(--color-text);
    align-self: flex-start;
    min-width: 3.5rem;
    text-align: center;
}

.calc-slider {
    width: 100%;
    accent-color: var(--color-primary);
    cursor: pointer;
    height: 6px;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* Card divider */
.card-divider {
    border: none;
    border-top: 1px solid rgba(90, 154, 74, 0.2);
    margin: 1rem 0;
}

/* Result text */
.result-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin: 0;
    line-height: 1.4;
}

/* Attribution */
.attribution {
    margin-top: 2rem;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.attribution a {
    color: var(--color-text-secondary);
    text-decoration: underline;
}

.attribution a:hover {
    color: var(--color-primary);
}

@media (max-width: 760px) {
    .calc-layout {
        grid-template-columns: 1fr;
    }

    .material-options {
        flex-direction: column;
    }
}