.area-tool-container {
    max-width: 450px;
    margin: 20px auto;
    background: #f5f5f5;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    font-family: 'Segoe UI', Tahoma, sans-serif;
    border: 1px solid #ddd;
    overflow: hidden;
}

.area-tool-header {
    background: #2e7d32;
    padding: 15px;
    text-align: center;
}

.area-tool-header h3 {
    margin: 0;
    color: #ffffff !important;
    font-size: 20px;
}

.area-tool-body { padding: 20px; }

.area-field { margin-bottom: 15px; }

.area-field label, .input-item label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
    color: #333;
}

.area-tool-body select, .area-tool-body input {
    width: 100% !important;
    padding: 10px !important;
    border: 1px solid #ccc !important;
    border-radius: 5px !important;
    box-sizing: border-box;
    font-size: 15px;
}

.area-inputs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

.area-btn-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.area-btn-calc {
    flex: 2;
    background: #4caf50 !important;
    color: white !important;
    border: none !important;
    padding: 12px !important;
    border-radius: 5px !important;
    cursor: pointer;
    font-weight: bold;
}

.area-btn-clear {
    flex: 1;
    background: #757575 !important;
    color: white !important;
    border: none !important;
    padding: 12px !important;
    border-radius: 5px !important;
    cursor: pointer;
}

.area-result-box {
    margin-top: 20px;
    background: #ffffff;
    padding: 15px;
    border-radius: 8px;
    border-left: 5px solid #2e7d32;
    text-align: center;
}

#finalAreaDisplay {
    font-size: 22px;
    font-weight: bold;
    color: #2e7d32;
}

/* Formula Table Styling */
.area-formula-section {
    max-width: 800px;
    margin: 30px auto;
    background: #ffffff;
    border-radius: 8px;
    border: 1px solid #ddd;
    overflow: hidden;
}

.formula-header {
    background: #2e7d32;
    padding: 12px;
    text-align: center;
    color: #fff;
}

.formula-table-wrapper { overflow-x: auto; padding: 10px; }

.formula-table {
    width: 100%;
    border-collapse: collapse;
}

.formula-table th { background: #757575; color: white; padding: 10px; text-align: left; }

.formula-table td { padding: 10px; border-bottom: 1px solid #eee; }

@media (max-width: 600px) {
    .area-inputs-grid { grid-template-columns: 1fr; }
}