* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Courier New', monospace;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 10px;
    overflow-x: hidden;
}

.container {
    text-align: center;
    width: 100%;
    max-width: 900px;
}

h1 {
    font-size: clamp(2rem, 8vw, 4rem);
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    letter-spacing: clamp(2px, 2vw, 10px);
}

.menu, .difficulty-menu {
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(20px, 5vw, 40px);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.menu h2, .difficulty-menu h2 {
    margin-bottom: 20px;
    font-size: clamp(1.5rem, 5vw, 2rem);
}

button {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
    padding: 12px 24px;
    font-size: clamp(1rem, 3vw, 1.2rem);
    font-family: 'Courier New', monospace;
    cursor: pointer;
    margin: 8px;
    border-radius: 8px;
    transition: all 0.3s;
    touch-action: manipulation;
    min-width: 120px;
}

button:hover, button:active {
    background: white;
    color: #1e3c72;
    transform: scale(1.05);
}

.game-container {
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(10px, 3vw, 20px);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.scoreboard {
    display: flex;
    justify-content: space-around;
    margin-bottom: 15px;
    font-size: clamp(1.5rem, 5vw, 2rem);
}

.score {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

#pongCanvas {
    background: #000;
    border: 3px solid white;
    border-radius: 5px;
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
    touch-action: none;
}

.controls {
    margin-top: 15px;
    font-size: clamp(0.8rem, 2.5vw, 1rem);
}

.controls p {
    margin: 5px 0;
}

.touch-controls {
    display: none;
    justify-content: space-between;
    gap: 10px;
    margin-top: 15px;
    padding: 0 10px;
}

.touch-controls.horizontal {
    flex-direction: row;
}

.touch-controls.horizontal .touch-control-side {
    flex-direction: row;
}

.touch-control-side {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

/* Reorder buttons for vertical layout: Up, Down, Release */
.touch-control-side #p1Up,
.touch-control-side #p2Up {
    order: 1;
}

.touch-control-side #p1Down,
.touch-control-side #p2Down {
    order: 2;
}

.touch-control-side #p1Release,
.touch-control-side #p2Release {
    order: 3;
}

/* Reorder buttons for horizontal layout: Up, Release, Down */
.touch-controls.horizontal .touch-control-side #p1Up,
.touch-controls.horizontal .touch-control-side #p2Up {
    order: 1;
}

.touch-controls.horizontal .touch-control-side #p1Release,
.touch-controls.horizontal .touch-control-side #p2Release {
    order: 2;
}

.touch-controls.horizontal .touch-control-side #p1Down,
.touch-controls.horizontal .touch-control-side #p2Down {
    order: 3;
}

.layout-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 8px 16px;
    font-size: clamp(0.85rem, 2.5vw, 0.95rem);
    margin-top: 10px;
    min-width: auto;
}

.touch-btn {
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid white;
    color: white;
    font-size: clamp(1.5rem, 4vw, 2rem);
    padding: 15px;
    border-radius: 10px;
    touch-action: manipulation;
    user-select: none;
    font-weight: bold;
}

.touch-btn:active {
    background: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px), (pointer: coarse) {
    .touch-controls {
        display: flex;
    }
    
    .controls {
        display: none;
    }
    
    .layout-toggle {
        display: inline-block;
    }
}

.game-over {
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(20px, 5vw, 40px);
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.game-over h2 {
    font-size: clamp(1.8rem, 6vw, 2.5rem);
    margin-bottom: 20px;
}

#backToMenu {
    margin-top: 15px;
}

.about-section {
    margin-top: 30px;
    text-align: center;
}

.about-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 10px 20px;
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    margin-bottom: 15px;
}

.about-content {
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(20px, 4vw, 30px);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.about-content h3 {
    font-size: clamp(1.3rem, 4vw, 1.8rem);
    margin-bottom: 15px;
    text-align: center;
}

.about-content p {
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    line-height: 1.6;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.95);
}

.feedback-btn {
    background: rgba(76, 175, 80, 0.3);
    border: 2px solid #4CAF50;
    width: 100%;
    margin: 15px 0 10px 0;
}

.feedback-btn:hover, .feedback-btn:active {
    background: #4CAF50;
    color: white;
}

.github-link {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: clamp(0.85rem, 2.5vw, 0.95rem);
    margin-top: 10px;
    text-align: center;
    transition: color 0.3s;
}

.github-link:hover {
    color: white;
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }
    
    button {
        padding: 10px 20px;
        margin: 5px;
        min-width: 100px;
    }
    
    .about-section {
        margin-top: 20px;
    }
    
    .about-content {
        text-align: left;
    }
}