/* Lumber Calculator Styles */
.lumber-mode-selector {
    margin-bottom: 2rem;
}

.mode-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.mode-btn {
    flex: 1;
    min-width: 200px;
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.mode-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.mode-btn.active {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    border-color: var(--primary);
    color: white;
}

.mode-btn i {
    font-size: 1.5rem;
}

.mode-btn span {
    font-weight: 600;
    font-size: 0.9rem;
}

.calculator-mode {
    display: none;
}

.calculator-mode.active {
    display: block;
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1rem 0;
}

.material-breakdown {
    background: var(--light-gray);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.breakdown-container {
    margin-top: 1rem;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    background: white;
    margin-bottom: 0.5rem;
    border-radius: var(--radius);
}

.breakdown-item:last-child {
    margin-bottom: 0;
    border-bottom: none;
}

.breakdown-label {
    font-weight: 500;
    color: var(--text);
}

.breakdown-value {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
}

.lumber-tips {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 1.5rem;
    border-left: 4px solid #f59e0b;
}

.lumber-tips h4 {
    margin-top: 0;
    color: #92400e;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lumber-tips h4 i {
    font-size: 1.2rem;
}

.tips-list.compact {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin: 0.5rem 0;
}

.tips-list.compact li {
    margin-bottom: 0.5rem;
    color: var(--gray);
}

.common-lumber-sizes {
    background: white;
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-top: 1.5rem;
    box-shadow: var(--shadow);
}

.size-table {
    margin-top: 1rem;
}

.size-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.size-row:last-child {
    border-bottom: none;
}

.size-row.header {
    font-weight: 700;
    background: var(--light-gray);
    border-radius: var(--radius) var(--radius) 0 0;
}

.guidelines-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.guideline {
    background: var(--light-gray);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.guideline h4 {
    margin-top: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.guideline p {
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
    .guidelines-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .mode-buttons {
        flex-direction: column;
    }
    
    .mode-btn {
        min-width: 100%;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .size-row {
        font-size: 0.9rem;
        grid-template-columns: 1fr 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .size-row {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 0.25rem;
    }
    
    .breakdown-item {
        flex-direction: column;
        text-align: center;
        gap: 0.25rem;
    }
}