body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background: url('/BG.jpg') no-repeat center center fixed;
    background-size: cover;
    background-color: #e0f7fa;
    transition: background-color 0.3s, color 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

.top-controls {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
    z-index: 1;
}

button {
    background: #00796b;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 15px;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s, transform 0.3s;
}

button:hover {
    background-color: #004d40;
}

.language-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1200px;
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    margin-top: 80px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border-radius: 12px;
    text-align: center;
    backdrop-filter: blur(10px);
}

h1 {
    color: #00796b;
    margin-bottom: 20px;
    font-size: 2.5rem;
}

.graph-container, .value-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    margin-bottom: 20px;
}

iframe {
    border: 1px solid #ccc;
    border-radius: 8px;
    width: 100%;
    max-width: 450px;
    height: 260px;
    transition: transform 0.3s, box-shadow 0.3s;
}

iframe:hover {
    transform: scale(1.05);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.5);
}

@media (max-width: 768px) {
    iframe {
        height: 200px;
    }
}

body.dark-mode {
    background-color: #121