:root {
  /* Цвета SENS */
  --sens-bg: #050816;          /* фон страницы */
  --sens-bg-alt: #0b1020;
  --sens-card: #0f172a;
  --sens-card-alt: #020617;

  --sens-primary: #7bff4f;     /* неоновый зелёный: заголовки, акценты */
  --sens-accent: #54ff3b;

  --sens-text: #e5e7eb;        /* основной текст */
  --sens-muted: #9ca3af;       /* приглушённый текст */
  --sens-border: rgba(148, 163, 184, 0.35);
  --sens-shadow: 0 18px 40px rgba(0, 0, 0, 0.5);

  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --transition: 0.2s ease-in-out;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top, #0b1020 0, #050816 45%, #020617 100%);
  color: var(--sens-text);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

/* Лёгкий узор справа, как на баннерах */
body::before {
  content: "";
  position: fixed;
  right: -5%;
  top: 0;
  width: 45%;
  height: 100%;
  pointer-events: none;
  opacity: 0.28;
  background-image:
    linear-gradient(135deg, rgba(123, 255, 79, 0.18) 0, rgba(123, 255, 79, 0.18) 1px, transparent 1px, transparent 16px),
    linear-gradient(to right, rgba(148, 163, 184, 0.18) 0, transparent 35%, transparent 100%);
  background-size:
    18px 18px,
    240px 100%;
  background-repeat: repeat, no-repeat;
  background-position: center center, right center;
  z-index: 0;
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

/* HEADER */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 8, 22, 0.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(51, 65, 85, 0.9);
}

.header-inner {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.logo-main {
  font-weight: 800;
  letter-spacing: 0.12em;
  font-size: 20px;
  color: var(--sens-primary);
}

.logo-sub {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--sens-muted);
}

.main-nav {
  display: flex;
  gap: 10px;
  font-size: 13px;
  flex-wrap: wrap;
  justify-content: center;
}

.main-nav a {
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--sens-muted);
  border: 1px solid transparent;
  transition: var(--transition);
}

.main-nav a:hover {
  border-color: rgba(123, 255, 79, 0.4);
  color: var(--sens-primary);
  background: rgba(15, 23, 42, 0.8);
  text-decoration: none;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  color: var(--sens-muted);
}

.lang-switch a {
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.lang-switch a.active {
  border-color: var(--sens-primary);
  color: var(--sens-primary);
  background: rgba(15, 23, 42, 0.9);
}

/* КАРУСЕЛЬ БАННЕРОВ */
/* Контейнер карусели */
.banner-carousel {
  width: 100%;
  /* единая высота для всех баннеров, но адаптивная */
  height: clamp(120px, 14vw, 220px);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(31, 41, 55, 0.9);

  background: #0b1e3c;
}

/* Каждый слайд занимает всю область карусели */
.banner-slide {
  position: absolute;
  inset: 0; /* top:0; right:0; bottom:0; left:0 */
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Картинка подстраивается по высоте, а не по ширине */
.banner-slide img {
  height: 100%;
  width: auto;
  object-fit: contain; /* показываем баннер целиком */
  display: block;
}


/* Крупные экраны — чуть выше */
@media (min-width: 1600px) {
    .banner-carousel {
        max-height: 320px;
    }
}

/* Маленькие экраны — ниже */
@media (max-width: 480px) {
    .banner-carousel {
        max-height: 200px;
        min-height: 100px;
    }
}



/* Две анимации по 5 секунд */
.banner-slide.slide-1 {
  animation: bannerSlide1 10s infinite;
}

.banner-slide.slide-2 {
  animation: bannerSlide2 10s infinite;
}

@keyframes bannerSlide1 {
  0% { opacity: 1; }
  45% { opacity: 1; }
  55% { opacity: 0; }
  100% { opacity: 0; }
}

@keyframes bannerSlide2 {
  0% { opacity: 0; }
  45% { opacity: 0; }
  55% { opacity: 1; }
  100% { opacity: 1; }
}

/* HERO */

.hero {
  padding: 40px 0 32px;
}

.hero-ru,
.hero-en {
  background: radial-gradient(circle at top left,
    rgba(17, 24, 39, 0.65) 0,
    rgba(5, 8, 22, 0.82) 40%,
    rgba(2, 6, 23, 0.94) 100%
  );
}

.hero-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  align-items: center;
}

.hero-text {
  flex: 1 1 280px;
  min-width: 260px;
}

.hero-image {
  flex: 0 0 340px;
  max-width: 400px;
  margin-left: auto;
}

.hero-image img {
  width: 100%;
  border-radius: 24px;
  box-shadow: var(--sens-shadow);
  display: block;
}

.hero-image-caption {
  margin-top: 8px;
  font-size: 12px;
  text-align: center;
  color: var(--sens-muted);
}

.hero h1 {
  font-size: clamp(26px, 3.1vw, 34px);
  margin: 0 0 10px;
  color: var(--sens-primary);
}

.hero-ru .hero-kicker,
.hero-en .hero-kicker {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--sens-muted);
  margin: 0 0 12px;
}

.hero p {
  margin: 6px 0;
  font-size: 15px;
  color: var(--sens-text);
}

.hero-quote {
  margin-top: 12px;
  font-size: 14px;
  color: var(--sens-primary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* КНОПКИ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn.primary {
  background: var(--sens-primary);
  color: #020617;
  box-shadow: var(--sens-shadow);
}

.btn.primary:hover {
  background: var(--sens-accent);
  text-decoration: none;
}

.btn.ghost {
  background: transparent;
  color: var(--sens-text);
  border-color: rgba(148, 163, 184, 0.5);
}

.btn.ghost:hover {
  border-color: var(--sens-primary);
  color: var(--sens-primary);
  background: rgba(15, 23, 42, 0.9);
  text-decoration: none;
}

.btn.small {
  padding: 6px 12px;
  font-size: 13px;
}

/* СЕКЦИИ */

.section {
  padding: 40px 0;
  background: transparent;
}

.section-alt {
  padding: 40px 0;
  background: rgba(15, 23, 42, 0.78);
}

.section h2 {
  font-size: 22px;
  margin: 0 0 14px;
  color: var(--sens-primary);
}

.section h3 {
  font-size: 17px;
  margin: 10px 0 8px;
  color: var(--sens-primary);
}

.section p {
  margin: 6px 0;
  font-size: 15px;
  color: var(--sens-text);
}

.about-list {
  margin: 8px 0 12px;
  padding-left: 18px;
  font-size: 15px;
  color: var(--sens-text);
}

/* СЕТКИ И КАРТОЧКИ */

.features-grid,
.solutions-grid,
.services-grid,
.materials-grid {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.features-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.solutions-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.services-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.materials-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.feature-card,
.solution-card,
.service-card,
.material-card {
  background: var(--sens-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--sens-border);
  padding: 14px 14px 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.section-alt .feature-card,
.section-alt .solution-card,
.section-alt .service-card,
.section-alt .material-card {
  background: var(--sens-card-alt);
}

.feature-card h3,
.solution-card h3,
.service-card h3,
.material-card h3 {
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--sens-primary);
}

.feature-card p,
.solution-card p,
.service-card p,
.material-card p {
  font-size: 14px;
  color: var(--sens-muted);
}

/* УСЛУГИ / МАТЕРИАЛЫ СПИСКИ */

.service-card ul {
  margin: 6px 0 0;
  padding-left: 18px;
  font-size: 14px;
  color: var(--sens-text);
}

.service-card li {
  margin: 3px 0;
}

.material-card p {
  font-size: 14px;
  margin-bottom: 10px;
}

/* ПОДПИСИ / ПРИМЕЧАНИЯ */

.note {
  font-size: 13px;
  color: var(--sens-muted);
  margin-top: 6px;
}

/* FOOTER */

.site-footer {
  border-top: 1px solid rgba(51, 65, 85, 0.9);
  background: #020617;
  padding: 16px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  font-size: 13px;
  color: var(--sens-muted);
}

/* АДАПТИВ */

@media (max-width: 900px) {
  .header-inner {
    justify-content: center;
  }

  .main-nav {
    order: 3;
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .banner-carousel {
    max-height: 240px;
    aspect-ratio: 3.5 / 1;
  }

  .hero-inner {
    flex-direction: column;
  }

  .hero-image {
    max-width: 100%;
    margin: 0;
  }
}