body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: linear-gradient(135deg, #89f7fe 0%, #66a6ff 100%);
    font-family: 'Poppins', sans-serif;
}

canvas {
    display: block;
    background-color: transparent;
}

#popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-align: center;
    z-index: 1000;
    display: none;
    border: 1px solid rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    width: 90%;
    max-width: 400px;
}

#popup h2 {
    margin-top: 0;
    color: #333;
    font-size: 2em;
}

#popup p {
    color: #555;
    font-size: 1.2em;
    min-height: 50px; /* Reserve space for message */
}

.button-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.popup-btn {
    padding: 10px 20px;
    border: none;
    color: white;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s, transform 0.2s;
}

.popup-btn:hover {
    transform: translateY(-2px);
}

#close-popup {
    background-color: #6c757d;
}
#close-popup:hover {
    background-color: #5a6268;
}

#generate-thought-btn {
    background-color: #66a6ff;
}
#generate-thought-btn:hover {
    background-color: #5095f5;
}

#title {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 2.5em;
    font-weight: 600;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.2);
}

.loader {
    border: 4px solid #f3f3f3;
    border-radius: 50%;
    border-top: 4px solid #66a6ff;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
    display: none; /* Hidden by default */
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}