body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #0d1117;
    color: #e6edf3;
}

.container {
    text-align: center;
    background: #161b22;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.6);
    width: 350px;
}

h1 {
    color: #e6edf3;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #238636;
    color: white;
    border: none;
    border-radius: 5px;
    margin: 10px;
    transition: background 0.3s;
}

button:hover {
    background-color: #2ea043;
}

.choice-btn {
    width: 100px;
}

input {
    padding: 10px;
    background: #0d1117;
    color: #e6edf3;
    border: 1px solid #30363d;
    border-radius: 5px;
    width: 150px;
}

.hidden {
    display: none;
}

#timer {
    font-size: 48px;
    font-weight: bold;
    color: #f85149;
}

.selected {
    background-color: #1f6feb !important;
}