/* Space Invaders - UI Components */

.ui {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    font-size: 18px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    padding: 30px;
    border-radius: 10px;
    border: 2px solid #ff0000;
    text-align: center;
    display: none;
}

.btn {
    background: #00ff00;
    color: #000;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    margin: 10px;
    font-weight: bold;
    transition: background-color 0.2s ease;
}

.btn:hover {
    background: #00cc00;
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.start-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    padding: 40px;
    border-radius: 15px;
    border: 2px solid #00ff00;
    text-align: center;
}

/* High score input styling */
input[type="text"] {
    padding: 10px;
    font-size: 18px;
    border: 2px solid #00ff00;
    background: #000;
    color: #00ff00;
    text-align: center;
    border-radius: 5px;
    margin: 10px;
}

input[type="text"]:focus {
    outline: none;
    box-shadow: 0 0 10px #00ff00;
}

/* Responsive design */
@media (max-width: 900px) {
    canvas {
        width: 90vw;
        height: auto;
    }

    .start-screen, .game-over {
        width: 90%;
        padding: 20px;
    }

    .btn {
        padding: 8px 16px;
        font-size: 14px;
    }
}