.underwater-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
    contain: strict;
}

.underwater-bg {
    position: absolute;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: linear-gradient(180deg, rgba(0, 105, 148, 0.1) 0%, rgba(0, 48, 143, 0.4) 100%);
    pointer-events: none;
    z-index: 10;
}

.underwater-symbol {
    position: absolute;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    font-size: 3rem;
    opacity: 0.9;
    z-index: 20;
}

.underwater-symbol img {
    width: 6vh;
    height: auto;
    max-width: 60px;
    object-fit: contain;
}

.underwater-seaweed {
    position: absolute;
    bottom: -1vh;
    font-size: 4rem;
    transform-origin: bottom center;
    animation: underwater-sway 4s ease-in-out infinite alternate;
    z-index: 30;
    opacity: 0.8;
}

.underwater-seaweed img {
    height: 12vh;
    width: auto;
    object-fit: contain;
    max-height: 120px;
}

.underwater-bubble {
    position: absolute;
    bottom: -5vh;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.1));
    box-shadow: inset 0 0 5px rgba(255, 255, 255, 0.5);
    animation: underwater-bubble-rise linear infinite;
    z-index: 40;
}

@keyframes underwater-swim-right {
    0% { transform: translateX(0) translateY(0) scaleX(-1); }
    50% { transform: translateX(65vw) translateY(-5vh) scaleX(-1); }
    100% { transform: translateX(130vw) translateY(0) scaleX(-1); }
}

@keyframes underwater-swim-left {
    0% { transform: translateX(0) translateY(0); }
    50% { transform: translateX(-65vw) translateY(5vh); }
    100% { transform: translateX(-130vw) translateY(0); }
}

@keyframes underwater-sway {
    0% { transform: rotate(-10deg); }
    100% { transform: rotate(10deg); }
}

@keyframes underwater-bubble-rise {
    0% { transform: translateY(0) translateX(0); opacity: 0; }
    10% { opacity: 0.7; }
    50% { transform: translateY(-55vh) translateX(-20px); }
    90% { opacity: 0; }
    100% { transform: translateY(-110vh) translateX(10px); opacity: 0; }
}