/* Base Page Styles */
body {
    margin: 0;
    padding: 20px;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    text-align: center;
}

/* Container for the periodic table using a grid layout with 18 columns */
#elements-container {
    display: grid;
    grid-template-columns: repeat(18, 1fr);
    grid-gap: 4px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Styling for each element box */
.element {
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 4px;
    position: relative;
    height: 100px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Color coding based on natural state */
.element.state-gas {
    background-color: #cce5ff; /* Light blue for gases */
}
.element.state-liquid {
    background-color: #d4edda; /* Light green for liquids */
}
.element.state-solid {
    background-color: #e2e3e5; /* Light gray for solids */
}
.element.state-unknown {
    background-color: #ffffff; /* White for unknown */
}

/* Hover effect */
.element:hover {
    transform: translateY(-2px);
}

/* Selected element style */
.element.selected {
    border: 2px solid #007bff;
}

/* Atomic number styling (top left corner) */
.element .number {
    position: absolute;
    top: 2px;
    left: 4px;
    font-size: 10px;
    font-weight: bold;
}

/* Element symbol styling */
.element .symbol {
    font-size: 24px;
    font-weight: bold;
    margin-top: 20px;
}

/* Element name styling */
.element .name {
    font-size: 12px;
}

/* Natural state styling */
.element .state {
    font-size: 10px;
    color: #555;
}

/* Combine button styling */
#combine-button {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

#combine-button:hover {
    background-color: #0056b3;
}

/* Result section styling */
#result {
    margin-top: 20px;
    text-align: center;
}

#result img {
    max-width: 300px;
    margin-top: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}