body {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    margin: 0;
    color: #333;
}

.container {
    max-width: 900px;
    margin: auto;
    padding: 20px;
}

.card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

h1, h2 {
    text-align: center;
}

input, select {
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

button {
    width: 100%;
    margin-top: 15px;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: #28a745;
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #218838;
}

.option {
    display: block;
    padding: 12px;
    border-radius: 8px;
    margin-top: 10px;
    background: #f1f1f1;
    cursor: pointer;
    transition: 0.2s;
}

.option:hover {
    background: #e0e0e0;
}

.correct {
    background: #28a745 !important;
    color: white;
}

.wrong {
    background: #dc3545 !important;
    color: white;
}

.logo {
    position: fixed;
    top: 10px;
    left: 10px;
    width: 120px;
}

.ranking-item {
    padding: 10px;
    border-bottom: 1px solid #ddd;
}