body {
    margin: 0;
    padding: 0;
    background: linear-gradient(to bottom, #ff4500, #000);
    overflow: hidden;
    height: 100vh;
}

.firefly {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #ff4500;
    border-radius: 50%;
    box-shadow: 0 0 10px #ff4500, 0 0 20px #ff4500, 0 0 30px #ff4500;
}

#firefly1 { animation: fly1 15s infinite ease-in-out; }
#firefly2 { animation: fly2 12s infinite ease-in-out; }
#firefly3 { animation: fly3 18s infinite ease-in-out; }
#firefly4 { animation: fly4 10s infinite ease-in-out; }
#firefly5 { animation: fly5 14s infinite ease-in-out; }
#firefly6 { animation: fly6 16s infinite ease-in-out; }
#firefly7 { animation: fly7 11s infinite ease-in-out; }
#firefly8 { animation: fly8 13s infinite ease-in-out; }
#firefly9 { animation: fly9 17s infinite ease-in-out; }
#firefly10 { animation: fly10 19s infinite ease-in-out; }

@keyframes fly1 {
    0%, 100% { transform: translate(10vw, 10vh); opacity: 0; }
    25% { transform: translate(80vw, 30vh); opacity: 1; }
    50% { transform: translate(20vw, 70vh); opacity: 1; }
    75% { transform: translate(90vw, 50vh); opacity: 1; }
}

@keyframes fly2 {
    0%, 100% { transform: translate(90vw, 90vh); opacity: 0; }
    25% { transform: translate(30vw, 20vh); opacity: 1; }
    50% { transform: translate(70vw, 80vh); opacity: 1; }
    75% { transform: translate(10vw, 40vh); opacity: 1; }
}

@keyframes fly3 {
    0%, 100% { transform: translate(50vw, 5vh); opacity: 0; }
    25% { transform: translate(100vw, 60vh); opacity: 1; }
    50% { transform: translate(5vw, 95vh); opacity: 1; }
    75% { transform: translate(60vw, 20vh); opacity: 1; }
}

@keyframes fly4 {
    0%, 100% { transform: translate(20vw, 80vh); opacity: 0; }
    25% { transform: translate(85vw, 10vh); opacity: 1; }
    50% { transform: translate(40vw, 50vh); opacity: 1; }
    75% { transform: translate(95vw, 90vh); opacity: 1; }
}

@keyframes fly5 {
    0%, 100% { transform: translate(70vw, 15vh); opacity: 0; }
    25% { transform: translate(15vw, 85vh); opacity: 1; }
    50% { transform: translate(80vw, 40vh); opacity: 1; }
    75% { transform: translate(25vw, 65vh); opacity: 1; }
}

@keyframes fly6 {
    0%, 100% { transform: translate(5vw, 50vh); opacity: 0; }
    25% { transform: translate(75vw, 5vh); opacity: 1; }
    50% { transform: translate(30vw, 90vh); opacity: 1; }
    75% { transform: translate(95vw, 30vh); opacity: 1; }
}

@keyframes fly7 {
    0%, 100% { transform: translate(85vw, 70vh); opacity: 0; }
    25% { transform: translate(10vw, 25vh); opacity: 1; }
    50% { transform: translate(60vw, 95vh); opacity: 1; }
    75% { transform: translate(40vw, 10vh); opacity: 1; }
}

@keyframes fly8 {
    0%, 100% { transform: translate(35vw, 90vh); opacity: 0; }
    25% { transform: translate(90vw, 40vh); opacity: 1; }
    50% { transform: translate(5vw, 60vh); opacity: 1; }
    75% { transform: translate(70vw, 15vh); opacity: 1; }
}

@keyframes fly9 {
    0%, 100% { transform: translate(60vw, 25vh); opacity: 0; }
    25% { transform: translate(20vw, 75vh); opacity: 1; }
    50% { transform: translate(95vw, 55vh); opacity: 1; }
    75% { transform: translate(45vw, 85vh); opacity: 1; }
}

@keyframes fly10 {
    0%, 100% { transform: translate(15vw, 35vh); opacity: 0; }
    25% { transform: translate(80vw, 80vh); opacity: 1; }
    50% { transform: translate(50vw, 10vh); opacity: 1; }
    75% { transform: translate(25vw, 95vh); opacity: 1; }
}

.button-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    text-align: center;
}

.grade-button {
    display: inline-block;
    margin: 15px;
    padding: 15px 30px;
    background: #ff4500;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s;
}

.grade-button:hover {
    box-shadow: 0 0 10px #ff4500, 0 0 20px #ff4500, 0 0 30px #ff4500;
    transform: scale(1.1);
}

.logo {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: auto;
    z-index: 10;
    filter: drop-shadow(0 0 10px #ff4500);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { filter: drop-shadow(0 0 10px #ff4500); }
    to { filter: drop-shadow(0 0 20px #ff4500); }
}

h1 {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    text-align: center;
    font-size: 2em;
    z-index: 10;
    filter: drop-shadow(0 0 10px #ff4500);
    animation: glow 2s ease-in-out infinite alternate;
}

@media (max-width: 768px) {
    .content {
        position: absolute;
        top: 10%;
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 90%;
        max-width: 400px;
    }

    .logo {
        position: static;
        transform: none;
        width: 120px;
        margin-bottom: 20px;
    }

    h1 {
        position: static;
        transform: none;
        font-size: 1.5em;
        margin: 0 0 20px 0;
        text-align: center;
    }

    .button-container {
        position: static;
        transform: none;
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    .grade-button {
        margin: 10px 0;
        font-size: 16px;
        padding: 12px 20px;
        width: 80%;
        max-width: 200px;
    }
}