/* =========================================
   ФОНОВЫЕ КАРТИНКИ M_* — СЛЕВА / СПРАВА
   ========================================= */
.index-bg-layer {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: -1 !important;
    overflow: hidden;
}

/* левая картинка */
.index-left {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: auto;
    object-fit: cover;
}

/* правая картинка */
.index-right {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    width: auto;
    object-fit: cover;
}

/* =========================================
   МЯГКИЕ КРАЯ — ТОЛЬКО ДЕСКТОП (≥1200px)
   ========================================= */
@media (min-width: 1200px) {

    .index-bg-layer::before,
    .index-bg-layer::after {
        content: "";
        position: fixed;
        top: 0;
        height: 100%;
        width: 40px;
        pointer-events: none;
        filter: blur(4px);
        z-index: 0;
    }

    .index-bg-layer::before {
        left: calc(50% - 600px); /* 1200px / 2 */
        background: linear-gradient(
            to right,
            rgba(0,0,0,0),
            rgba(255,255,255,0.85)
        );
    }

    .index-bg-layer::after {
        right: calc(50% - 600px);
        background: linear-gradient(
            to left,
            rgba(0,0,0,0),
            rgba(255,255,255,0.85)
        );
    }
}

/* =========================================
   ЦЕНТРАЛЬНЫЙ ПОЛУПРОЗРАЧНЫЙ БЛОК
   ========================================= */
.index-middle-column {
    position: relative;
    z-index: 5;
    max-width: 1200px;
    margin: -15px auto -20px; /* прижимаем к navbar и footer */
    padding: 25px 40px;
    background: rgba(255,255,255,0.83);
    backdrop-filter: blur(12px);
    border-radius: 8px;
}

/* убираем случайные отступы сверху/снизу внутри */
.index-top h1 {
    margin-top: 0;
}

.index-bottom {
    margin-bottom: 0;
}

/* =========================================
   NAVBAR / FOOTER — НАД ВСЕМ
   ========================================= */
.navbar,
header,
footer {
    position: relative;
    z-index: 1000 !important;
}

/* =========================================
   ЭКРАНЫ 1200–1600px — ПЛАВНАЯ ПОДСТРОЙКА ЦЕНТРА
   ========================================= */
@media (max-width: 1600px) and (min-width: 1200px) {

    .index-middle-column {
        max-width: clamp(
            968px,
            calc(70vw - 96px),
            1122px
        );
    }

    .index-bg-layer::before {
        left: calc(
            50% - clamp(
                484px,
                calc(35vw - 48px),
                561px
            )
        );
    }

    .index-bg-layer::after {
        right: calc(
            50% - clamp(
                484px,
                calc(35vw - 48px),
                561px
            )
        );
    }
}

/* =========================================
   МОБИЛЬНЫЕ + ПЛАНШЕТЫ (≤1199px)
   ========================================= */
@media (max-width: 1199px) {

    .index-left,
    .index-right {
        display: none;
    }

    .index-middle-column {
        border-radius: 0;
        margin: 0 auto;
        padding: 20px;
        backdrop-filter: blur(4px);
    }
}