:root {
    --primary-dark-green: #004d40;
    --secondary-dark-green: #00695c;
    --accent-gold: #c7a46e;
    --light-gray: #f4f4f4;
    --dark-text: #333;
    --light-text: #ffffff;
    --border-radius: 8px;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--light-gray);
    color: var(--dark-text);
}

.database-hero-section {
    background: linear-gradient(rgba(0, 77, 64, 0.8), rgba(0, 77, 64, 0.8)), url('images/Singapore supertree 1.jpg') no-repeat center center/cover;
    color: var(--light-text);
    padding: 4rem 0;
    text-align: center;
}

.database-hero-section h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.database-section {
    padding: 4rem 0;
}

.filters-container {
    background-color: var(--light-text);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 3rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 250px;
}

.filter-group label {
    font-weight: 600;
    color: var(--primary-dark-green);
}

.filter-group input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    background: #ddd;
    border-radius: 5px;
    outline: none;
}

.filter-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--secondary-dark-green);
    cursor: pointer;
    border-radius: 50%;
}

.filter-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--secondary-dark-green);
    cursor: pointer;
    border-radius: 50%;
}

.filter-group select {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: 'Poppins', sans-serif;
}

.filter-group span {
    font-weight: 600;
    color: var(--primary-dark-green);
    align-self: center;
}

.charts-container {
    background-color: var(--light-text);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 3rem;
}

.chart-wrapper {
    max-width: 800px;
    margin: 0 auto;
    height: 500px; /* Increased height */
    margin-bottom: 2rem;
}

.chart-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1rem;
    gap: 1rem;
}

.chart-controls label {
    font-weight: 600;
    color: var(--primary-dark-green);
}

.chart-controls select {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-family: 'Poppins', sans-serif;
}

.table-container {
    background-color: var(--light-text);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    overflow-x: auto;
}

#schools-table {
    width: 100%;
    border-collapse: collapse;
}

#schools-table thead {
    background-color: var(--primary-dark-green);
    color: var(--light-text);
}

#schools-table th {
    padding: 1rem;
    text-align: left;
    cursor: pointer;
}

#schools-table th:hover {
    background-color: var(--secondary-dark-green);
}

#schools-table td {
    padding: 1rem;
    border-bottom: 1px solid #ddd;
}

#schools-table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

#schools-table tbody tr:hover {
    background-color: #e8f5e9; /* A very light green */
}