/* --- Base Setup --- */
body, html {
    margin: 0;
    padding: 0;
    overflow: hidden;
    height: 100%;
    font-family: 'Poppins', sans-serif;
    background-color: #121212;
    color: #f0f0f0;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    cursor: none;
}

/* --- Player Ball --- */
#ball {
    position: absolute;
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, #00bfff 0%, #0077ff 100%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px #00bfff, 0 0 30px #0077ff;
    pointer-events: none;
    z-index: 10;
    will-change: left, top;
}

#ball.clicked {
    transform: translate(-50%, -50%) scale(0.8);
    box-shadow: 0 0 10px #00bfff;
}

/* --- Enemies --- */
.enemy {
    position: absolute;
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 30px solid #ff414d;
    filter: drop-shadow(0 0 8px rgba(255, 65, 77, 0.7));
    transform-origin: center 66%;
    will-change: left, top, transform;
}

.enemy.big {
    border-left-width: 30px;
    border-right-width: 30px;
    border-bottom-width: 60px;
}

.enemy.small {
    border-left-width: 10px;
    border-right-width: 10px;
    border-bottom-width: 20px;
}

/* --- Screens --- */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(18, 18, 18, 0.95);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    z-index: 20;
    cursor: default;
}

.screen.hidden {
    display: none;
}

.screen h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.screen p {
    font-size: 1.2rem;
    color: #aaa;
    margin-bottom: 2rem;
}

#high-score-display, #game-over-high-score {
    font-size: 1.5rem;
    color: #f0f0f0;
    margin-top: -1rem;
    margin-bottom: 2rem;
}

#game-over-high-score.new {
    color: #ffd700;
    animation: new-score-pulse 1s infinite;
}

@keyframes new-score-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.screen .button-container {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.screen .difficulty-container {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.screen label {
    font-size: 1.2rem;
}

.screen input[type="number"] {
    width: 80px;
    padding: 0.5rem;
    font-size: 1.2rem;
    background-color: #333;
    border: 1px solid #555;
    color: #f0f0f0;
    border-radius: 8px;
    text-align: center;
}

.screen button {
    padding: 1rem 2rem;
    font-size: 1.5rem;
    background: linear-gradient(45deg, #0077ff, #00bfff);
    border: none;
    border-radius: 12px;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 4px 15px rgba(0, 150, 255, 0.4);
}

.screen button.btn-secondary {
    background: #4a5568;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

.screen button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 150, 255, 0.6);
}

.screen button.btn-secondary:hover {
    background: #5a6578;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
}

#score-display {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 2rem;
    z-index: 5;
    color: rgba(255, 255, 255, 0.8);
}