body {
    font-family: 'Arial', sans-serif;
    text-align: center;
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    color: #fff;
    margin: 0;
    padding: 20px;
    min-height: 100vh;
}

h1 {
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    margin-bottom: 30px;
}

#image-container img,
#question-img img {
    max-height: 200px;
    max-width: 200px;
    border-radius: 50%;
    box-shadow: 0 8px 32px rgba(255, 255, 255, 0.2);
    transition: transform 0.2s ease;
    border: 3px solid #fff;
}

#image-container img:hover,
#question-img img:hover {
    transform: scale(1.05);
}

button {
    padding: 12px 24px;
    margin: 10px;
    font-size: 1.1em;
    cursor: pointer;
    border-radius: 25px;
    border: none;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    transition: all 0.3s ease;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

button:hover {
    background: linear-gradient(45deg, #764ba2, #667eea);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

button:active {
    transform: translateY(0);
}

input, select {
    padding: 10px;
    margin: 8px;
    font-size: 1em;
    border-radius: 10px;
    border: 2px solid #4a90e2;
    background: rgba(255,255,255,0.9);
    transition: all 0.3s ease;
}

input:focus, select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.3);
}

#menu, #pauseMenu, #ranking {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 20px;
    display: none;
    margin: 20px auto;
    width: min(350px, 90vw);
    box-sizing: border-box;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.2);
}

#stats {
    margin-top: 15px;
    font-size: 1em;
    color: #e1e8f0;
    background: rgba(255,255,255,0.1);
    padding: 10px;
    border-radius: 10px;
    display: inline-block;
}

#result {
    font-size: 1.3em;
    font-weight: bold;
    margin-top: 20px;
    padding: 15px;
    border-radius: 10px;
    display: inline-block;
}

#question {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    margin: 20px auto;
    max-width: min(400px, 90vw);
    box-sizing: border-box;
    border: 1px solid rgba(255,255,255,0.2);
}

#question h2 {
    margin-top: 0;
    color: #fff;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

#menu, #pauseMenu, #question, #ranking {
    animation: fadeIn 0.5s ease;
}

.difficulty-selector {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin: 10px 0;
}

.difficulty-btn {
    padding: 8px 16px;
    margin: 0;
    font-size: 0.95em;
    opacity: 0.55;
}

.difficulty-btn.active {
    opacity: 1;
    box-shadow: 0 0 0 2px #fff inset, 0 4px 15px rgba(0,0,0,0.2);
}