/* ============================================
   BLOCK21: Footer
   ============================================ */
.block21 {
  position: relative;
  width: 100%;
  padding: 50px var(--side-padding) 40px;
  box-sizing: border-box;
}

.block21::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 100%;
  background-color: #404040;
  z-index: -1;
}

.block21_container {
  max-width: var(--content-width);
  margin: 0 auto;
}

/* Первая часть: 4 колонки */
.block21_top {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 90px;
}

.block21_column {
  display: flex;
  flex-direction: column;
}

.block21_column_title {
  font-family: Roboto, Arial, sans-serif;
  font-weight: 400;
  font-style: normal;
  font-size: 16px;
  color: #828283;
  margin: 0 0 20px 0;
  text-decoration: none;
  display: block;
  cursor: pointer;
  transition: color 0.3s ease;
}

.block21_column_title:hover {
  color: #D2232A;
}

.block21_column_list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.block21_link {
  font-family: Roboto, Arial, sans-serif;
  font-weight: 400;
  font-style: normal;
  font-size: 16px;
  color: #FFFFFF;
  text-decoration: none;
  transition: color 0.3s ease;
}

.block21_link:hover {
  color: #D2232A;
}

/* Вторая часть: CIS логотип и 3 колонки */
.block21_middle {
  display: flex;
  justify-content: space-between;
  gap: 93px;
  margin-bottom: 40px;
}

.block21_logo {
  flex-shrink: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.block21_logo_image {
  max-width: 192px;
  max-height: 144px;
  width: 100%;
  height: auto;
  object-fit: contain;
  flex-shrink: 1;
  min-width: 0;
}

.block21_middle_columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  flex: 1;
}

/* Третья часть: Белая линия и копирайт */
.block21_bottom {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.block21_divider {
  width: 100%;
  height: 1px;
  background-color: #FFFFFF;
}

.block21_footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.block21_copyright {
  font-family: Roboto, Arial, sans-serif;
  font-weight: 400;
  font-style: normal;
  font-size: 16px;
  color: #FFFFFF;
}

.block21_social {
  display: flex;
  align-items: center;
  gap: 20px;
}

.block21_social_icon {
  display: inline-block;
  width: 31px;
  height: 31px;
  flex-shrink: 0;
}

.block21_social_icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.block21_social_icon:has(img[alt="YouTube"]),
.block21_social_icon:has(img[src*="YouTube"]) {
  width: auto;
  min-width: 31px;
}

.block21_social_icon img[alt="YouTube"],
.block21_social_icon img[src*="YouTube"] {
  width: auto;
  height: 100%;
}

/* Адаптивность для block21 */
@media (max-width: 1024px) {
  .block21_middle {
    flex-direction: column;
    gap: 40px;
  }
  
  .block21_middle_columns {
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
    order: 1;
  }
  
  .block21_logo {
    order: 2;
    align-self: center;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .block21_logo_image {
    max-width: 192px;
    max-height: 144px;
    width: 100%;
    height: auto;
    object-fit: contain;
  }
  
  .block21_footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
}

@media (max-width: 768px) {
  .block21_top {
    grid-template-columns: repeat(2, 1fr);
    margin-bottom: 50px !important;
  }
  
  .block21_middle {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    width: 100%;
  }
  
  .block21_middle_columns {
    display: contents;
  }
  
  .block21_middle_columns .block21_column:nth-child(1) {
    grid-column: 1;
    grid-row: 1;
  }
  
  .block21_middle_columns .block21_column:nth-child(2) {
    grid-column: 2;
    grid-row: 1;
  }
  
  .block21_middle_columns .block21_column:nth-child(3) {
    grid-column: 1;
    grid-row: 2;
  }
  
  .block21_logo {
    grid-column: 2;
    grid-row: 2;
    justify-content: flex-start;
  }

  .block21_column_title,
  .block21_link {
    font-size: 14px !important;
  }

  .block21_logo_image {
    max-width: 121px;
    max-height: 89px;
    width: auto;
    height: auto;
    object-fit: contain;
    flex-shrink: 1;
    min-width: 0;
  }
  
  .block21_footer {
    flex-direction: row !important;
    justify-content: space-between !important;
    align-items: center !important;
    gap: 1px;
  }
  
  .block21_footer,
  .block21_footer * {
    font-size: 14px !important;
  }
  
  /* block21_social слева, block21_copyright справа — как на боевом */
  .block21_social {
    flex-direction: row !important;
    align-items: center !important;
    gap: 10px;
    order: 1;
  }

  .block21_copyright {
    order: 2;
  }

  .block21_social_icon {
    width: 24px !important;
    height: 24px !important;
  }
  
  .block21_social_icon img {
    width: 24px !important;
    height: 24px !important;
  }
  
  .block21_social_icon:has(img[alt="YouTube"]),
  .block21_social_icon:has(img[src*="YouTube"]) {
    width: auto !important;
    min-width: 24px !important;
    height: 24px !important;
  }
  
  .block21_social_icon img[alt="YouTube"],
  .block21_social_icon img[src*="YouTube"] {
    width: auto !important;
    height: 100% !important;
  }
}

@media (max-width: 600px) {
  .block21_top {
    grid-template-columns: repeat(2, 1fr);
  }

  .block21_middle_columns {
    grid-template-columns: repeat(2, 1fr);
  }

  .block21_middle {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    width: 100%;
  }
  
  .block21_middle_columns {
    display: contents;
  }
  
  .block21_middle_columns .block21_column:nth-child(1) {
    grid-column: 1;
    grid-row: 1;
  }
  
  .block21_middle_columns .block21_column:nth-child(2) {
    grid-column: 2;
    grid-row: 1;
  }
  
  .block21_middle_columns .block21_column:nth-child(3) {
    grid-column: 1;
    grid-row: 2;
  }
  
  .block21_logo {
    grid-column: 2;
    grid-row: 2;
    align-self: flex-end;
  }
}

@media (max-width: 450px) {
  .block21_logo_image {
    max-width: 100%;
    max-height: 100px;
  }
}