/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #0b0f19;
  --color-bg-alt: #111827;
  --color-surface: #1a2234;
  --color-surface-hover: #243049;
  --color-border: #2a3548;
  --color-text: #e8edf5;
  --color-text-muted: #94a3b8;
  --color-primary: #f97316;
  --color-primary-hover: #ea580c;
  --color-primary-soft: rgba(249, 115, 22, 0.15);
  --color-accent: #3b82f6;
  --color-success: #22c55e;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --header-h: 72px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--lg {
  padding: 18px 36px;
  font-size: 16px;
}

.btn--full {
  width: 100%;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: border-color var(--transition), background var(--transition);
}

.header.scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(11, 15, 25, 0.95);
}

.header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  flex-shrink: 0;
}

.logo__icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), #ef4444);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
}

.nav {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.nav__link {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

.nav__link:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.header__phone {
  font-weight: 600;
  font-size: 15px;
  color: var(--color-primary);
  white-space: nowrap;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 40px) 0 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(249, 115, 22, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
    var(--color-bg);
  z-index: 0;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 80%);
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero__title {
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero__title span {
  background: linear-gradient(135deg, var(--color-primary), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 56px;
}

.hero__stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.stat__num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section__header {
  text-align: center;
  margin-bottom: 56px;
}

.section__label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section__desc {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ===== About ===== */
.about {
  background: var(--color-bg-alt);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about__text p {
  color: var(--color-text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.75;
}

.about__cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
}

.info-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.info-card__icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.info-card h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}

.info-card p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== Products ===== */
.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.product-card:hover {
  border-color: rgba(249, 115, 22, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.product-card--featured {
  border-color: rgba(249, 115, 22, 0.3);
  background: linear-gradient(160deg, var(--color-surface) 0%, rgba(249, 115, 22, 0.06) 100%);
}

.product-card__badge {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 16px;
}

.product-card__icon {
  font-size: 36px;
  margin-bottom: 12px;
}

.product-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.3;
}

.product-card__power {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.product-card__desc {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.product-card__features {
  margin-bottom: 20px;
}

.product-card__features li {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 4px 0 4px 18px;
  position: relative;
}

.product-card__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
  font-size: 12px;
}

.product-card__models {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.product-card__models span {
  padding: 4px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
}

/* Extra accessories */
.products__extra {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.products__extra h3 {
  font-size: 1.2rem;
  margin-bottom: 24px;
  text-align: center;
}

.extra-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.extra-item {
  text-align: center;
  padding: 16px;
}

.extra-item strong {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}

.extra-item span {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== Advantages ===== */
.advantages {
  background: var(--color-bg-alt);
}

.advantages__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color var(--transition);
}

.advantage:hover {
  border-color: var(--color-primary);
}

.advantage__num {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.advantage h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.advantage p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== Applications ===== */
.apps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.app-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.app-card:hover {
  border-color: rgba(249, 115, 22, 0.4);
  transform: translateY(-2px);
}

.app-card__icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.app-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.app-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== CTA ===== */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.12) 0%, rgba(59, 130, 246, 0.08) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta__text h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.cta__text p {
  color: var(--color-text-muted);
  font-size: 1rem;
  max-width: 500px;
}

/* ===== Contacts ===== */
.contacts__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contacts__info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact-item__icon {
  width: 48px;
  height: 48px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-text-muted);
}

.contact-item p {
  font-size: 15px;
  line-height: 1.5;
}

.contact-item a {
  color: var(--color-primary);
  font-weight: 500;
}

.contact-item a:hover {
  text-decoration: underline;
}

/* Form */
.contacts__form-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.contact-form h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.form-note {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 14px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  color: var(--color-text);
  font-family: var(--font);
  font-size: 15px;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-disclaimer {
  font-size: 12px;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 12px;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-top: 64px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer__brand p {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-top: 16px;
  max-width: 280px;
  line-height: 1.6;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer__col h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--color-text);
}

.footer__col a,
.footer__col span {
  display: block;
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 4px 0;
  transition: color var(--transition);
}

.footer__col a:hover {
  color: var(--color-primary);
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
}

.footer__bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
  text-align: center;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .products__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .about__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
  }

  .nav.open {
    display: flex;
  }

  .nav__link {
    padding: 12px 16px;
  }

  .header__phone {
    display: none;
  }

  .burger {
    display: flex;
    margin-left: auto;
  }

  .hero__stats {
    gap: 32px;
  }

  .products__grid {
    grid-template-columns: 1fr;
  }

  .advantages__grid,
  .apps__grid {
    grid-template-columns: 1fr;
  }

  .extra-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about__cards {
    grid-template-columns: 1fr;
  }

  .contacts__grid {
    grid-template-columns: 1fr;
  }

  .cta__inner {
    flex-direction: column;
    text-align: center;
  }

  .cta__text p {
    margin: 0 auto;
  }

  .footer__inner {
    grid-template-columns: 1fr;
  }

  .footer__cols {
    grid-template-columns: 1fr 1fr;
  }

  .section {
    padding: 72px 0;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .extra-grid {
    grid-template-columns: 1fr;
  }

  .footer__cols {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    gap: 24px;
  }

  .stat__num {
    font-size: 1.6rem;
  }
}