/* Март: стая перелётных птиц */

#marchBirdsLayer {
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    overflow: hidden;
    background: transparent;
}

.mar-bird {
    position: absolute;
    pointer-events: none;
    z-index: 10;
    animation: marFlyAcross var(--flight-dur, 7s) ease-in-out forwards;
    animation-delay: var(--flight-delay, 0s);
    opacity: 0;
}

@keyframes marFlyAcross {
    0% {
        transform: translateX(0) translateY(0);
        opacity: 0;
    }
    5% { opacity: 1; }
    10% { transform: translateX(10vw) translateY(-8px); }
    30% { transform: translateX(30vw) translateY(5px); }
    60% { transform: translateX(60vw) translateY(-12px); }
    85% {
        transform: translateX(85vw) translateY(6px);
        opacity: 1;
    }
    95% { opacity: 0.6; }
    100% {
        transform: translateX(105vw) translateY(0);
        opacity: 0;
    }
}

.mar-bird-body {
    position: relative;
    width: 24px;
    height: 14px;
    background: var(--bird-color, #4a4a4a);
    border-radius: 60% 60% 50% 50%;
    transform: rotate(-5deg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mar-bird-body::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 18px;
    width: 10px;
    height: 10px;
    background: var(--bird-color, #4a4a4a);
    border-radius: 50%;
}

.mar-bird-body::after {
    content: '';
    position: absolute;
    top: 2px;
    left: -10px;
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 8px solid var(--bird-color, #4a4a4a);
}

.mar-wing {
    position: absolute;
    top: -2px;
    width: 8px;
    height: 16px;
    background: var(--bird-wing, #3a3a3a);
    border-radius: 4px;
    transform-origin: bottom center;
    animation: marFlap var(--flap-dur, 0.4s) ease-in-out infinite alternate;
}

.mar-wing.mar-wing--left {
    left: 4px;
    transform-origin: bottom right;
    animation: marFlapLeft var(--flap-dur, 0.4s) ease-in-out infinite alternate;
}

.mar-wing.mar-wing--right {
    right: 4px;
    transform-origin: bottom left;
}

@keyframes marFlap {
    0% { transform: rotate(20deg); }
    100% { transform: rotate(-25deg); }
}

@keyframes marFlapLeft {
    0% { transform: rotate(-20deg); }
    100% { transform: rotate(25deg); }
}

@media (prefers-reduced-motion: reduce) {
    #marchBirdsLayer {
        display: none;
    }
}