:root {
  --bg-deep: #03101c;
  --bg-mid: #082b43;
  --bg-air: #0e4565;

  --text: #f6f5f2;
  --secondary: #b8c7cf;
  --muted: #7f94a0;

  --orange: #ff741c;
  --orange-hover: #ff8732;
  --cyan: #69cdf7;
  --cyan-soft: rgba(105,205,247,.22);

  --shell: 82rem;
  --pad: clamp(1rem, 3vw, 2rem);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(ellipse at 22% 18%, rgba(83,176,217,.10), transparent 34rem),
    radial-gradient(ellipse at 55% 0%, rgba(58,157,201,.15), transparent 42rem),
    linear-gradient(180deg, #041522, #08273b 60rem, #0b3852 120rem);
  font-family: "Manrope", "Segoe UI", Arial, sans-serif;
  overflow-x: hidden;
}

a { color: inherit; }

.shell {
  width: min(calc(100% - 2 * var(--pad)), var(--shell));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 999;
  left: 1rem;
  top: 1rem;
  padding: .75rem 1rem;
  color: #05111a;
  background: var(--orange);
  border-radius: .65rem;
  transform: translateY(-160%);
}
.skip-link:focus { transform: none; }

.lab-strip {
  position: relative;
  z-index: 30;
  min-height: 2.45rem;
  display: grid;
  align-items: center;
  color: #aec2cc;
  background: rgba(3,13,23,.78);
  border-bottom: 1px solid rgba(136,208,237,.11);
  backdrop-filter: blur(16px);
}

.lab-strip__inner {
  min-height: 2.45rem;
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr auto;
  align-items: center;
  gap: 1rem;
}

.lab-strip__item {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  white-space: nowrap;
  font-size: .7rem;
  font-weight: 600;
}

.lab-strip__item b {
  color: var(--cyan);
  font-family: Consolas, monospace;
  font-size: .78rem;
}

.lab-strip__inner > i {
  height: 1px;
  min-width: 1rem;
  background: linear-gradient(90deg, transparent, rgba(255,116,28,.45), transparent);
}

.site-header {
  position: absolute;
  z-index: 25;
  left: 0;
  right: 0;
  top: 2.45rem;
}

.site-header__inner {
  min-height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  color: var(--text);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: .02em;
  text-decoration: none;
}
.brand span { color: var(--orange); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2.4rem;
}

.site-nav a {
  color: #eef4f6;
  text-decoration: none;
  font-size: .9rem;
  font-weight: 650;
}

.site-nav a:hover { color: var(--cyan); }

.hero {
  position: relative;
  min-height: 54rem;
  overflow: hidden;
  isolation: isolate;
  background: #082940;
}

.hero__background {
  position: absolute;
  z-index: -8;
  inset: 0;
  overflow: hidden;
  background:
    radial-gradient(ellipse 52rem 34rem at 72% 42%, rgba(45,148,195,.13), transparent 72%),
    linear-gradient(180deg, #061d2e 0%, #082a40 64%, #0a3149 100%);
}

.hero__background::before {
  content: "";
  position: absolute;
  inset: -5%;
  background:
    url("../images/hero-integrated-desktop.webp") center center / cover no-repeat;
  opacity: .34;
  filter: blur(24px) saturate(.92) brightness(.95);
  transform: scale(1.06);
}

.hero__background img {
  position: absolute;
  width: min(100%, 96rem);
  height: 91%;
  left: 50%;
  top: 50%;
  object-fit: cover;
  object-position: center center;
  display: block;
  transform: translate(-50%, -50%);
  filter: brightness(1.035) saturate(1.02);

  -webkit-mask-image:
    radial-gradient(
      ellipse 55% 58% at 50% 50%,
      #000 0 70%,
      rgba(0,0,0,.96) 78%,
      rgba(0,0,0,.45) 90%,
      transparent 100%
    );
  mask-image:
    radial-gradient(
      ellipse 55% 58% at 50% 50%,
      #000 0 70%,
      rgba(0,0,0,.96) 78%,
      rgba(0,0,0,.45) 90%,
      transparent 100%
    );
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -5;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 31rem 24rem at 31% 58%,
      rgba(70,169,211,.12), transparent 72%),
    radial-gradient(ellipse 26rem 22rem at 48% 48%,
      rgba(76,179,218,.09), transparent 72%),
    linear-gradient(90deg,
      rgba(4,18,30,.46) 0%,
      rgba(4,18,30,.33) 18%,
      rgba(4,18,30,.12) 35%,
      rgba(4,18,30,0) 58%),
    linear-gradient(180deg,
      rgba(3,14,24,.19) 0%,
      rgba(3,14,24,0) 31%,
      rgba(7,31,48,.07) 74%,
      rgba(8,41,62,.53) 100%);
}

.hero::after {
  content: "";
  position: absolute;
  z-index: -4;
  left: -12%;
  right: -12%;
  bottom: -3rem;
  height: 17rem;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 24% 46%, rgba(78,174,217,.15), transparent 43%),
    radial-gradient(ellipse at 68% 34%, rgba(44,143,190,.12), transparent 48%),
    radial-gradient(ellipse at 89% 58%, rgba(255,121,31,.035), transparent 38%),
    linear-gradient(
      180deg,
      transparent 0%,
      rgba(10,49,73,.18) 40%,
      rgba(10,49,73,.72) 73%,
      #0a3149 100%
    );
  filter: blur(12px);
}

.hero__atmosphere {
  position: absolute;
  z-index: -3;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 7% 29%, rgba(255,120,31,.62) 0 1px, transparent 1.6px),
    radial-gradient(circle at 21% 67%, rgba(94,199,238,.48) 0 1px, transparent 1.6px),
    radial-gradient(circle at 39% 22%, rgba(255,120,31,.44) 0 1px, transparent 1.6px),
    radial-gradient(circle at 52% 73%, rgba(94,199,238,.42) 0 1px, transparent 1.6px),
    radial-gradient(circle at 72% 18%, rgba(255,120,31,.42) 0 1px, transparent 1.6px),
    radial-gradient(circle at 89% 62%, rgba(94,199,238,.42) 0 1px, transparent 1.6px);
  background-size:
    19rem 21rem,
    23rem 25rem,
    28rem 22rem,
    24rem 27rem,
    26rem 24rem,
    21rem 25rem;
  opacity: .52;
}

.hero__plane {
  display: none;
}

.hero__plane--a {
  width: 42rem;
  height: 24rem;
  right: 20%;
  top: 9rem;
  transform: rotate(-5deg);
  clip-path: polygon(0 12%, 93% 0, 100% 84%, 12% 100%);
}

.hero__plane--b {
  width: 30rem;
  height: 16rem;
  right: -8rem;
  bottom: 5rem;
  transform: rotate(5deg);
  border-color: rgba(255,139,62,.14);
  clip-path: polygon(4% 0,100% 14%,92% 100%,0 87%);
}

.hero__inner {
  min-height: 54rem;
  display: flex;
  align-items: center;
  padding-top: 5rem;
}

.hero__content {
  width: min(39rem, 47%);
  position: relative;
  z-index: 3;
}

.hero__content::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 34rem;
  height: 27rem;
  left: -10rem;
  top: 50%;
  transform: translateY(-48%);
  border-radius: 50%;
  pointer-events: none;
  background:
    radial-gradient(ellipse,
      rgba(70,166,207,.095),
      rgba(35,112,151,.04) 48%,
      transparent 73%);
  filter: blur(12px);
}

.eyebrow {
  margin: 0 0 1.25rem;
  color: var(--orange);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: .77rem;
  font-weight: 700;
  letter-spacing: .13em;
}

.hero h1 {
  margin: 0 0 1.4rem;
  font-size: clamp(3.45rem, 4.25vw, 4.35rem);
  line-height: 1.02;
  letter-spacing: -.045em;
  font-weight: 500;
}

.hero h1 span,
.hero h1 strong {
  display: block;
  white-space: nowrap;
}

.hero h1 strong {
  color: var(--orange);
  font-weight: 650;
}

.hero__lead {
  max-width: 31rem;
  margin: 0 0 2rem;
  color: var(--secondary);
  font-size: .98rem;
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
}

.button {
  min-height: 3rem;
  padding-inline: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .8rem;
  border: 1px solid transparent;
  border-radius: .72rem;
  text-decoration: none;
  font-size: .9rem;
  font-weight: 700;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.button:hover { transform: translateY(-1px); }

.button--primary {
  color: #06111a;
  background: linear-gradient(180deg, #ff8a36, var(--orange));
  box-shadow: 0 0 28px rgba(255,116,28,.15);
}

.button--primary:hover {
  background: linear-gradient(180deg, #ff9848, var(--orange-hover));
  box-shadow: 0 0 34px rgba(255,116,28,.22);
}

.button--secondary {
  color: var(--text);
  background: rgba(7,31,47,.30);
  border-color: rgba(143,215,244,.32);
  backdrop-filter: blur(10px);
}

.button--secondary:hover {
  border-color: rgba(143,215,244,.55);
  box-shadow: 0 0 24px rgba(105,205,247,.08);
}

.after-hero {
  position: relative;
  min-height: 70rem;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 8%, rgba(50,152,198,.15), transparent 28rem),
    radial-gradient(ellipse at 18% 35%, rgba(77,172,211,.09), transparent 28rem),
    radial-gradient(ellipse at 76% 64%, rgba(63,161,202,.10), transparent 30rem),
    linear-gradient(180deg, #0a3149, #0c3e59 56%, #08283b);
}

.after-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .45;
  background:
    linear-gradient(27deg, transparent 49.7%, rgba(95,190,228,.045) 50%, transparent 50.3%),
    linear-gradient(153deg, transparent 49.7%, rgba(255,122,31,.035) 50%, transparent 50.3%);
  background-size: 28rem 24rem, 34rem 28rem;
}

.after-hero__glow {
  position: absolute;
  width: 48rem;
  height: 24rem;
  left: 50%;
  top: 8rem;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(78,178,218,.13), rgba(255,121,31,.03) 46%, transparent 72%);
  filter: blur(24px);
}

#skills-anchor {
  position: absolute;
  top: 27rem;
}
#about-anchor {
  position: absolute;
  top: 56rem;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

@media (max-width: 1050px) {
  .lab-strip__inner {
    gap: .65rem;
  }
  .lab-strip__item { font-size: .66rem; }
  .site-nav { gap: 1.5rem; }
  .hero__content { width: min(37rem, 50%); }
  .hero h1 { font-size: clamp(3rem, 4.5vw, 3.85rem); }
}

@media (max-width: 760px) {
  .lab-strip__inner {
    grid-template-columns: minmax(0,1fr) auto minmax(0,1fr);
    gap: .45rem;
  }

  .lab-strip__item {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .lab-strip__item:nth-of-type(2),
  .lab-strip__item:nth-of-type(3),
  .lab-strip__item:nth-of-type(4),
  .lab-strip__inner > i:nth-of-type(2),
  .lab-strip__inner > i:nth-of-type(3) {
    display: none;
  }

  /* Компактнее Header: логотип и навигация остаются одной группой. */
  .site-header__inner {
    min-height: 6.15rem;
    padding-top: .65rem;
    padding-bottom: .8rem;
    align-items: flex-start;
    flex-direction: column;
    gap: .55rem;
  }

  .site-nav {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: .3rem;
  }

  .site-nav a {
    text-align: center;
    font-size: .78rem;
  }

  /*
    На mobile текст и сцена должны читаться последовательно:
    сначала Hero-copy, затем небольшой воздушный переход, затем ноутбук.
  */
  .hero {
    min-height: 62rem;
  }

  .hero__background::before {
    display: none;
  }

  .hero__background img {
    width: 100%;
    height: 100%;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    object-fit: cover;
    object-position: center top;
    transform: translateY(3.2rem);
    filter: brightness(1.03) saturate(1.02);
    -webkit-mask-image: none;
    mask-image: none;
  }

  .hero::before {
    background:
      linear-gradient(180deg,
        rgba(4,18,30,.58) 0%,
        rgba(4,18,30,.40) 31%,
        rgba(4,18,30,.18) 46%,
        rgba(4,18,30,.03) 59%,
        rgba(7,31,48,.12) 76%,
        rgba(8,41,62,.56) 100%);
  }

  .hero__inner {
    min-height: 62rem;
    padding-top: 6.55rem;
    align-items: flex-start;
  }

  .hero__content {
    width: 100%;
  }

  .eyebrow {
    margin-bottom: .9rem;
  }

  .hero h1 {
    max-width: 100%;
    margin-bottom: 1.15rem;
    font-size: clamp(2.35rem, 10.1vw, 2.85rem);
    line-height: 1.04;
  }

  .hero h1 span,
  .hero h1 strong {
    white-space: normal;
  }

  .hero__lead {
    max-width: 100%;
    margin-bottom: 1.55rem;
    font-size: .93rem;
    line-height: 1.65;
  }

  .hero__actions {
    display: grid;
    gap: .7rem;
  }

  .button {
    width: 100%;
    min-height: 3.15rem;
  }

  .after-hero {
    min-height: 56rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}