.hero {
    position: relative;
    height: 600px;
    background: url('../images/bg.jpg') no-repeat center/cover;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 180, 255, 0.2);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 20, 60, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.hero-overlay h2 {
    font-size: 60px;
    text-shadow: 0 0 15px #00b4ff;
    margin-bottom: 20px;
}

.hero-overlay p {
    font-size: 24px;
    max-width: 800px;
    text-align: center;
    color: #e1f5fe;
}

.hero-overlay .btn {
    margin-top: 30px;
    padding: 15px 40px;
    background: #00b4ff;
    border: none;
    border-radius: 30px;
    font-size: 20px;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
}

.hero-overlay .btn:hover {
    background: #0288d1;
    box-shadow: 0 0 20px #00b4ff;
}

.bubble {
    position: absolute;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    animation: float 6s infinite ease-in-out;
}

.bubble:nth-child(1) {
    width: 20px;
    height: 20px;
    left: 10%;
    bottom: -20px;
    animation-delay: 0s;
}

.bubble:nth-child(2) {
    width: 30px;
    height: 30px;
    left: 20%;
    bottom: -30px;
    animation-delay: 1s;
}

.bubble:nth-child(3) {
    width: 15px;
    height: 15px;
    left: 70%;
    bottom: -15px;
    animation-delay: 2s;
}

.bubble:nth-child(4) {
    width: 25px;
    height: 25px;
    left: 90%;
    bottom: -25px;
    animation-delay: 3s;
}



@keyframes glow {
    0% {
        text-shadow: 0 0 10px #00b4ff;
    }

    100% {
        text-shadow: 0 0 20px #00b4ff, 0 0 30px #0288d1;
    }
}

@keyframes float {
    0% {
        transform: translateY(0);
        opacity: 1;
    }

    100% {
        transform: translateY(-700px);
        opacity: 0;
    }
}