* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    background-attachment: fixed;
}

.game {
    width: 100%;
    height: 100vh;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hidden {
    display: none !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

button, a.play-btn, a.back-home-btn, a.start-btn {
    transition: all 0.3s ease;
    cursor: pointer;
}

button:active, a.play-btn:active, a.back-home-btn:active {
    transform: scale(0.98);
}

@media (max-width: 480px) {
    .game {
        padding: 10px;
    }
}