/*
Theme Name: OptiMetrik
Theme URI: https://optimetrik.ru
Description: WordPress-тема сайта ООО «Оптиметрик»/
Version: 1.0.0
Author: Basya
Text Domain: optimetrik
*/

:root {
  --primary-color: #0052cc;
  --primary-hover: #0043a4;
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --font-family: 'Inter', sans-serif;
  --header-bg: #ffffff;
  --header-height: 80px;
  --transition-speed: 0.25s;
}

body {
  font-family: var(--font-family);
  background-color: #ffffff;
  margin: 0;
  padding: 0;
}


.header {
  background-color: var(--header-bg);
  border-bottom: 1px solid #f1f5f9;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header__container {
  height: var(--header-height);
}

.header__logo-area {
  display: flex;
  align-items: center;
}

.header__logo-link {
  display: flex;
  align-items: center;
}

.header__logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
}


.header__nav-list {
  display: flex;
  align-items: center;
}

.header__nav-item {
  margin: 0 1.25rem;
}

.header__nav-link {
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-speed);
}

.header__nav-link:hover {
  color: var(--primary-color);
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform var(--transition-speed) ease-out;
}

.header__nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.header__nav-link--active {
  color: var(--primary-color) !important;
}

.header__nav-link--active::after {
  transform: scaleX(1);
}


.header__btn {
  background-color: var(--primary-color);
  color: #ffffff;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  transition: background-color var(--transition-speed), transform 0.2s;
  border: none;
}

.header__btn:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
}

.header__btn:active {
  transform: scale(0.98);
}

.header__burger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  padding: 0;
  border: none;
  background: transparent;
}

.header__burger:focus {
  box-shadow: none;
}

.header__burger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-dark);
  border-radius: 2px;
  position: relative;
  transition: transform var(--transition-speed), opacity var(--transition-speed);
}

.header__burger::before,
.header__burger::after {
  content: '';
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-dark);
  border-radius: 2px;
  transition: transform var(--transition-speed), opacity var(--transition-speed);
}


.mobile-menu {
  width: 300px;
  background-color: var(--header-bg);
}

.mobile-menu__header {
  padding: 1.5rem;
  border-bottom: 1px solid #f1f5f9;
}

.mobile-menu__title {
  font-weight: 700;
  color: var(--text-dark);
  font-size: 1.25rem;
}

.mobile-menu__close:focus {
  box-shadow: none;
}

.mobile-menu__body {
  padding: 2rem 1.5rem;
}

.mobile-menu__nav-item {
  margin-bottom: 1.25rem;
}

.mobile-menu__nav-link {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  display: block;
  padding: 0.5rem 0;
  transition: color var(--transition-speed);
}

.mobile-menu__nav-link:hover,
.mobile-menu__nav-link--active {
  color: var(--primary-color) !important;
}

.mobile-menu__btn {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.75rem;
  border-radius: 6px;
}

.mobile-menu__btn:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
}


.hero {
  position: relative;
  padding: 6.5rem 0;
  background-color: #ffffff;
  background-image: 
    linear-gradient(to right, rgba(0, 82, 204, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 82, 204, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  overflow: hidden;
}

.hero__tags {
  margin-bottom: 1.5rem;
}

.hero__tag {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  color: var(--primary-color);
  background-color: rgba(0, 82, 204, 0.03);
  border: 1px solid rgba(0, 82, 204, 0.15);
  text-transform: uppercase;
  display: inline-block;
}

.hero__title {
  font-size: calc(1.8rem + 1.8vw);
  font-weight: 800;
  color: #0f172a;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero__title--highlight {
  color: var(--primary-color);
}

.hero__description {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 540px;
}

.hero__btn--primary {
  background-color: var(--primary-color);
  color: #ffffff;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 1rem 2rem;
  border-radius: 6px;
  transition: background-color var(--transition-speed), transform 0.2s;
  border: none;
}

.hero__btn--primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
}

.hero__btn--outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid rgba(0, 82, 204, 0.2);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 1rem 2rem;
  border-radius: 6px;
  transition: background-color var(--transition-speed), border-color var(--transition-speed), transform 0.2s;
}

.hero__btn--outline:hover {
  background-color: rgba(0, 82, 204, 0.04);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.hero__btn:active {
  transform: scale(0.98);
}

.hero__stats {
  border-top: 1px solid #f1f5f9;
  padding-top: 2rem;
  margin-top: 2.5rem;
}

.hero__stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.hero__stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero__diagram-card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.03);
  width: 100%;
  max-width: 520px;
}

.hero__diagram-header {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.hero__diagram-wrapper {
  width: 100%;
}

.hero__diagram {
  position: relative;
  width: 460px;
  height: 300px;
  margin: 0 auto;
}

.hero__diagram-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero__diagram-row {
  position: absolute;
  z-index: 2;
}

.hero__diagram-row--top {
  top: 0;
  left: 165px;
  width: 130px;
}

.hero__diagram-row--middle {
  top: 100px;
  left: 30px;
  width: 400px;
  display: flex;
  justify-content: space-between;
}

.hero__diagram-row--merging {
  top: 180px;
  left: 30px;
  width: 400px;
}

.hero__diagram-row--bottom {
  top: 250px;
  left: 165px;
  width: 130px;
}

.hero__diagram-block {
  width: 130px;
  height: 45px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: #ffffff;
  border: 1px solid #cbd5e1;
}

.hero__diagram-block--gray {
  background-color: #f8fafc;
  border-color: #cbd5e1;
}

.hero__diagram-block--blue {
  border-color: var(--primary-color);
}

.hero__diagram-block--blue .hero__diagram-block-title {
  color: var(--primary-color);
}

.hero__diagram-block--dark-blue {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: #ffffff;
}

.hero__diagram-block--dark-blue .hero__diagram-block-subtitle {
  color: rgba(255, 255, 255, 0.8);
}

.hero__diagram-block-title {
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.2;
}

.hero__diagram-block-subtitle {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.2;
}

.hero__diagram-merging {
  width: 400px;
  height: 50px;
  border-radius: 6px;
  border: 1px solid var(--primary-color);
  background-color: rgba(0, 82, 204, 0.03);
  padding: 0 1rem;
}

.hero__diagram-merging-side {
  width: 35%;
}

.hero__diagram-merging-center {
  width: 30%;
}

.hero__diagram-merging-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1.2;
}

.hero__diagram-merging-subtitle {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.2;
}

@media (max-width: 575.98px) {
  .hero__diagram-wrapper {
    overflow-x: auto;
    padding-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
  }
  .hero__diagram-card {
    padding: 1.5rem;
  }
}


.partners {
  background-color: #ffffff;
  border-top: 1px solid #f1f5f9;
  border-bottom: 1px solid #f1f5f9;
  padding: 1.75rem 0;
  overflow: hidden;
  position: relative;
}

.partners::before,
.partners::after {
  content: '';
  position: absolute;
  top: 0;
  width: 120px;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.partners::before {
  left: 0;
  background: linear-gradient(to right, #ffffff, transparent);
}

.partners::after {
  right: 0;
  background: linear-gradient(to left, #ffffff, transparent);
}

.partners__slider {
  width: 100%;
  overflow: hidden;
}

.partners__track {
  display: flex;
  width: max-content;
  animation: marquee 25s linear infinite;
}

.partners__track:hover {
  animation-play-state: paused;
}

.partners__item {
  padding: 0 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.partners__logo {
  width: 150px;
  height: 40px;
  opacity: 0.55;
  object-fit: contain;
  transition: opacity var(--transition-speed), transform var(--transition-speed);
}

.partners__logo:hover {
  opacity: 1;
  transform: scale(1.05);
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.catalog {
  background-color: #f8fafc;
  padding: 6.5rem 0;
}

.catalog__subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 0.1em;
}

.catalog__title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #0f172a;
}

.catalog__description {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 500px;
}

.catalog__card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 2.5rem;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.catalog__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.04);
  border-color: rgba(0, 82, 204, 0.1);
}

.catalog__card-id {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.catalog__card-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  color: #ffffff;
  background-color: var(--primary-color);
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.catalog__card-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: #0f172a;
}

.catalog__card-category {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-color);
}

.catalog__card-text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.catalog__card-specs {
  border-top: 1px solid #f1f5f9;
  padding-top: 1.5rem;
}

.catalog__card-spec-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.catalog__card-spec-value {
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
}

.catalog__card-tags {
  margin-top: 1.5rem;
}

.catalog__card-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.catalog__card-btn {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary-color) !important;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  transition: color var(--transition-speed);
}

.catalog__card-btn-arrow {
  transition: transform var(--transition-speed);
}

.catalog__card-btn:hover .catalog__card-btn-arrow {
  transform: translateX(4px);
}

.history {
  background-color: #ffffff;
  padding: 6.5rem 0;
}

.history__subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 0.1em;
}

.history__title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #0f172a;
}

.history__description {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 500px;
}

.history__timeline {
  position: relative;
  padding-left: 2.5rem;
  margin-top: 3rem;
  max-width: 800px;
}

.history__line {
  position: absolute;
  left: 15px;
  top: 16px;
  width: 2px;
  height: calc(100% - 32px);
  background: transparent;
  border-left: 2px dashed #cbd5e1;
  z-index: 1;
}

.history__item {
  position: relative;
}

.history__node-wrapper {
  position: absolute;
  left: -2.5rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  background-color: #ffffff;
}

.history__node {
  width: 12px;
  height: 12px;
  background-color: #ffffff;
  border: 3px solid #cbd5e1;
  border-radius: 50%;
  transition: border-color var(--transition-speed), background-color var(--transition-speed);
  position: relative;
}

.history__node--active {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
}

.history__node--active::after {
  content: '';
  position: absolute;
  left: -7px;
  top: -7px;
  width: 20px;
  height: 20px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: pulse-ring 1.8s infinite ease-in-out;
  opacity: 0;
}

.history__card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.02);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.history__card:hover {
  transform: translateX(6px);
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.04);
  border-color: rgba(0, 82, 204, 0.1);
}

.history__year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.history__item-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #0f172a;
}

.history__item-text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.history__item-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

@keyframes pulse-ring {
  0% {
    transform: scale(0.6);
    opacity: 0;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    transform: scale(1.4);
    opacity: 0;
  }
}

.contacts {
  background-color: #f8fafc;
  padding: 6.5rem 0;
}

.contacts__subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 0.1em;
}

.contacts__title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #0f172a;
}

.contacts__description {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 500px;
}

.contacts__info-card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 1.75rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.02);
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.contacts__info-card:hover {
  border-color: rgba(0, 82, 204, 0.1);
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.04);
}

.contacts__info-icon {
  width: 44px;
  height: 44px;
  background-color: rgba(0, 82, 204, 0.04);
  color: var(--primary-color);
  border-radius: 8px;
  flex-shrink: 0;
}

.contacts__info-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.contacts__info-value {
  font-size: 1.0625rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 0.125rem;
}

.contacts__info-subtext {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.contacts__certs-card {
  background-color: #f0f7ff;
  border: 1px solid rgba(0, 82, 204, 0.15);
  border-radius: 12px;
  padding: 1.75rem;
}

.contacts__certs-title {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contacts__certs-item {
  font-size: 0.875rem;
  color: #1e293b;
  font-weight: 500;
}

.contacts__certs-checkmark {
  color: var(--primary-color);
  font-weight: bold;
}

.contacts__certs-text {
  color: #0f172a;
}

.contacts__form-card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 3rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.02);
}

.contacts__form-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contacts__form-input,
.contacts__form-select,
.contacts__form-textarea {
  font-family: var(--font-family);
  font-size: 0.9375rem;
  color: #0f172a;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  padding: 0.75rem 1rem;
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.contacts__form-input::placeholder,
.contacts__form-textarea::placeholder {
  color: #94a3b8;
}

.contacts__form-input:focus,
.contacts__form-select:focus,
.contacts__form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.contacts__form-btn {
  background-color: var(--primary-color);
  color: #ffffff;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.875rem 2rem;
  border-radius: 6px;
  border: none;
  transition: background-color var(--transition-speed), transform 0.2s;
}

.contacts__form-btn:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
}

.contacts__form-btn:active {
  transform: scale(0.98);
}

@media (max-width: 991.98px) {
  .contacts__form-card {
    padding: 2rem;
  }
}

.product-popup__image-wrapper {
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  padding: 1.5rem;
}

.product-popup__image {
  max-height: 220px;
  object-fit: contain;
  border-radius: 8px;
}

.product-popup__title {
  font-size: 1.75rem;
  font-weight: 800;
  color: #0f172a;
}

.product-popup__category {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-popup__tabs {
  border-bottom: 2px solid #f1f5f9;
}

.product-popup__tabs .nav-link {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-muted);
  border: none;
  padding: 0.75rem 1rem;
  position: relative;
  transition: color var(--transition-speed);
}

.product-popup__tabs .nav-link:hover {
  color: var(--primary-color);
  background: transparent;
}

.product-popup__tabs .nav-link.active {
  color: var(--primary-color);
  background: transparent;
}

.product-popup__tabs .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
}

.product-popup__tab-content {
  padding: 1rem 0 0 0;
  min-height: 160px;
}

.product-popup__list-bullet {
  color: var(--primary-color);
  font-weight: bold;
}

.product-popup__list-item {
  font-size: 0.9375rem;
  color: var(--text-dark);
  line-height: 1.6;
}

.product-popup__text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.product-popup__table {
  font-size: 0.9375rem;
}

.product-popup__table-label {
  color: var(--text-muted);
  font-weight: 500;
  padding: 0.5rem 0;
  width: 50%;
}

.product-popup__table-value {
  color: var(--text-dark);
  font-weight: 700;
  padding: 0.5rem 0;
}

.product-popup__legend-code {
  color: var(--primary-color);
  font-size: 1rem;
}

.product-popup__doc-link {
  font-size: 0.9375rem;
  color: var(--text-dark);
  transition: color var(--transition-speed);
}

.product-popup__doc-link:hover {
  color: var(--primary-color);
}

.product-popup__doc-link span {
  color: var(--primary-color);
  font-weight: bold;
}


.about-hero,
.contacts-hero {
  position: relative;
  padding: 8rem 0;
  background-image: linear-gradient(rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.75)), url('img/about_banner.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border-bottom: 1px solid #0f172a;
}

.about-hero__title,
.contacts-hero__title {
  font-size: 3.5rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.about-hero__subtitle,
.contacts-hero__subtitle {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
  max-width: 700px;
}

.about-sidebar-container {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  pointer-events: none;
  z-index: 100;
}

.about-sidebar {
  position: sticky;
  top: 140px;
  pointer-events: auto;
  padding: 0.5rem 0 0.5rem 1.5rem;
  border-left: 2px solid #e2e8f0;
  margin-left: 2rem;
}

.about-sidebar__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted) !important;
  padding: 0.375rem 0;
  transition: color var(--transition-speed);
  position: relative;
  display: flex;
  align-items: center;
}

.about-sidebar__link:hover {
  color: var(--primary-color) !important;
}

.about-sidebar__link.active {
  color: var(--primary-color) !important;
  font-weight: 700;
}

.about-sidebar__link::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #cbd5e1;
  border: 2px solid #ffffff;
  transition: background-color var(--transition-speed), transform var(--transition-speed), border-color var(--transition-speed);
}

.about-sidebar__link:hover::before {
  background-color: var(--primary-color);
  transform: translateY(-50%) scale(1.2);
}

.about-sidebar__link.active::before {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-50%) scale(1.4);
}

.about-rd, .about-production, .about-partners, .about-requisites {
  padding: 5rem 0;
}

.about-section-header {
  margin-bottom: 3.5rem;
}

.about-section-subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 0.1em;
}

.about-section-title {
  font-size: 2rem;
  font-weight: 800;
  color: #0f172a;
}

.about-section-description {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
}

.about-card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 2rem;
  height: 100%;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.01), 0 2px 4px -1px rgba(0, 0, 0, 0.006);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.about-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(15, 23, 42, 0.04);
  border-color: rgba(0, 82, 204, 0.1);
}

.about-card__icon-wrapper {
  width: 40px;
  height: 40px;
  background-color: rgba(0, 82, 204, 0.04);
  color: var(--primary-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

.about-card__text {
  font-size: 0.9375rem;
  color: var(--text-dark);
  line-height: 1.6;
}

.about-partner-card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 2rem;
  height: 100%;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.02);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.about-partner-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.04);
  border-color: rgba(0, 82, 204, 0.1);
}

.about-partner-card__logo-wrapper {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  background-color: #f8fafc;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  border: 1px solid #e2e8f0;
}

.about-partner-card__logo {
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
}

.about-partner-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #0f172a;
}

.about-partner-card__text {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.about-partner-card__link {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary-color) !important;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color var(--transition-speed);
}

.about-partner-card__link:hover {
  color: var(--primary-hover) !important;
}

.about-table-container {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.02);
}

.about-table {
  font-size: 0.9375rem;
  margin: 0;
}

.about-table th {
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 2px solid #f1f5f9;
  padding: 1rem;
}

.about-table td {
  color: var(--text-dark);
  padding: 1rem;
  border-bottom: 1px solid #f1f5f9;
  vertical-align: middle;
}

.about-table tr:last-child td {
  border-bottom: none;
}

.about-table__label {
  font-weight: 600;
  color: var(--text-muted) !important;
  width: 30%;
}

.footer {
  background-color: #0f172a;
  color: #94a3b8;
  border-top: 1px solid #1e293b;
}

.footer__logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
}

.footer__text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: #94a3b8;
  max-width: 320px;
}

.footer__title {
  font-size: 0.75rem;
  font-weight: 700;
  color: #f1f5f9;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer__nav-link {
  font-size: 0.875rem;
  color: #94a3b8;
  transition: color var(--transition-speed);
}

.footer__nav-link:hover {
  color: #ffffff;
}

.footer__contact-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer__contact-value {
  font-size: 0.875rem;
  color: #cbd5e1;
}

.footer__divider {
  border-color: #1e293b;
  opacity: 1;
}

.footer__bottom {
  font-size: 0.75rem;
  color: #64748b;
}

.footer__legal-link {
  color: #64748b;
  transition: color var(--transition-speed);
}

.footer__legal-link:hover {
  color: #ffffff;
}

.projects {
  padding: 6.5rem 0;
}

.projects__header {
  margin-bottom: 3.5rem;
}

.projects__subtitle {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 0.1em;
}

.projects__title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #0f172a;
}

.projects__description {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 500px;
}

.projects__card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: 12px;
  padding: 1.5rem;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
}

.projects__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.04);
  border-color: rgba(0, 82, 204, 0.1);
}

.projects__img-wrapper {
  background-color: #f8fafc;
  border-radius: 8px;
  overflow: hidden;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.projects__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-speed);
}

.projects__card:hover .projects__img {
  transform: scale(1.05);
}

.projects__card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: #0f172a;
}

.projects__card-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.projects__card-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-speed);
}

.projects__card-link:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

.projects__card--placeholder {
  background-color: rgba(255, 255, 255, 0.4);
  border: 2px dashed #cbd5e1;
  box-shadow: none !important;
  backdrop-filter: blur(8px);
}

.projects__card--placeholder:hover {
  border-color: var(--primary-color);
  background-color: #ffffff;
}

.projects__placeholder-icon {
  font-size: 2rem;
  color: var(--text-muted);
  font-weight: 300;
  transition: color var(--transition-speed);
}

.projects__card--placeholder:hover .projects__placeholder-icon {
  color: var(--primary-color);
}