/* about-bg-animation.css - Анимированный фон для блока "О системе" */

@import url('https://fonts.googleapis.com/css?family=Exo:400,700');


.about {
    position: relative;
    overflow: hidden;
    /* background-color: var(--color-bg-alt); */
    padding: 4rem 0;
}


.about__bg-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Список кружков */
.about__bg-circles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

/* Каждый кружок */
.about__bg-circles li {
    position: absolute;
    display: block;
    list-style: none;
    width: 20px;
    height: 20px;
    background: rgba(44, 86, 151, 0.15);
    animation: aboutAnimate 15s linear infinite;
    bottom: -150px;
}

/* Индивидуальные параметры для каждого кружка*/
.about__bg-circles li:nth-child(1) {
    left: 25%;
    width: 80px;
    height: 80px;
    animation-delay: 0s;
    background: rgba(44, 86, 151, 0.2);
}

.about__bg-circles li:nth-child(2) {
    left: 10%;
    width: 20px;
    height: 20px;
    animation-delay: 2s;
    animation-duration: 10s;
    background: rgba(44, 86, 151, 0.1);
}

.about__bg-circles li:nth-child(3) {
    left: 70%;
    width: 20px;
    height: 20px;
    animation-delay: 4s;
    background: rgba(44, 86, 151, 0.1);
}

.about__bg-circles li:nth-child(4) {
    left: 40%;
    width: 60px;
    height: 60px;
    animation-delay: 0s;
    animation-duration: 16s;
    background: rgba(44, 86, 151, 0.18);
}

.about__bg-circles li:nth-child(5) {
    left: 65%;
    width: 20px;
    height: 20px;
    animation-delay: 0s;
    background: rgba(44, 86, 151, 0.1);
}

.about__bg-circles li:nth-child(6) {
    left: 75%;
    width: 110px;
    height: 110px;
    animation-delay: 3s;
    background: rgba(44, 86, 151, 0.22);
}

.about__bg-circles li:nth-child(7) {
    left: 35%;
    width: 150px;
    height: 150px;
    animation-delay: 7s;
    background: rgba(44, 86, 151, 0.25);
}

.about__bg-circles li:nth-child(8) {
    left: 50%;
    width: 25px;
    height: 25px;
    animation-delay: 15s;
    animation-duration: 45s;
    background: rgba(44, 86, 151, 0.1);
}

.about__bg-circles li:nth-child(9) {
    left: 20%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 35s;
    background: rgba(44, 86, 151, 0.08);
}

.about__bg-circles li:nth-child(10) {
    left: 85%;
    width: 150px;
    height: 150px;
    animation-delay: 0s;
    animation-duration: 11s;
    background: rgba(44, 86, 151, 0.2);
}

/* Адаптивные размеры кружков для мобильных */
@media (max-width: 768px) {
    .about__bg-circles li {
        width: 15px;
        height: 15px;
    }

    .about__bg-circles li:nth-child(1) {
        width: 50px;
        height: 50px;
    }

    .about__bg-circles li:nth-child(4) {
        width: 40px;
        height: 40px;
    }

    .about__bg-circles li:nth-child(6) {
        width: 70px;
        height: 70px;
    }

    .about__bg-circles li:nth-child(7),
    .about__bg-circles li:nth-child(10) {
        width: 90px;
        height: 90px;
    }
}


@keyframes aboutAnimate {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
    }

    100% {
        transform: translateY(-800px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }
}

/* Контент блока "О системе" — поверх анимации */
.about .container {
    position: relative;
    z-index: 1;
}

.about__module-title {
    color: var(--color-primary-dark);
}

.about__module-text {
    color: var(--color-text);
    position: relative;
    z-index: 1;
}