/* ===========================
   HEADER — SUDOLAB NEON STYLE
=========================== */

.site-header {
  position: relative;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(
      to bottom,
      rgba(3, 6, 24, 0.356),
      rgba(3, 6, 24, 0.418),
      rgba(3, 6, 24, 0.384)
    );
  border-bottom: 1px solid rgba(124, 144, 255, 0.35);
}

/* layout */

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  gap: 18px;
}

/* ===========================
   LOGO
=========================== */

.logo {
  font-family: system-ui, -apple-system, "SF Pro Text", "Segoe UI", sans-serif;
  font-weight: 800;
  font-size: 20px;
  line-height: 1.1;
  letter-spacing: 0.16em;
  text-decoration: none;
  text-transform: uppercase;
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  color: var(--text-main);
}

.logo span:first-child {
  background: linear-gradient(120deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo span:last-child {
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ===========================
   NAV DESKTOP
=========================== */

.nav {
  display: flex;
  gap: 22px;
  align-items: center;
}

.header__nav > ul {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ссылки */

.nav a,
.header__nav > ul a {
  position: relative;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.16em;
  padding: 6px 4px;
  text-transform: uppercase;
  transition:
    color 0.2s ease,
    transform 0.15s ease,
    opacity 0.2s ease;
}

/* подчёркивание — неоновая линия */

.nav a::before,
.header__nav > ul a::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  transform-origin: center;
  transform: scaleX(0);
  transition: transform 0.22s ease;
}

.nav a:hover,
.header__nav > ul a:hover {
  color: var(--text-main);
  transform: translateY(-1px);
}

.nav a:hover::before,
.header__nav > ul a:hover::before {
  transform: scaleX(1);
}

/* ===========================
   BURGER BUTTON
=========================== */

.burger {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  border: 1px solid rgba(77, 243, 255, 0.8);
  background: radial-gradient(circle at 0 0, rgba(77, 243, 255, 0.22), transparent 65%);
  cursor: pointer;
  transition: all 0.25s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
}

/* три полоски */

.burger::before,
.burger::after,
.burger .icon-left {
  content: "";
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent-2);
  transition: all 0.25s ease;
}

.burger::before {
  top: 13px;
  transform: translateX(-50%);
}

.burger::after {
  bottom: 13px;
  transform: translateX(-50%);
}

.burger .icon-left {
  top: 50%;
  transform: translate(-50%, -50%);
}

/* hover */

.burger:hover {
  border-color: var(--accent-2);
  background: radial-gradient(circle at 30% 0, rgba(77, 243, 255, 0.35), transparent 70%);
  transform: translateY(-1px);
}

/* open -> крест */

.burger.open {
  background: radial-gradient(circle at 30% 0, rgba(255, 79, 216, 0.38), transparent 70%);
  border-color: var(--accent);
}

.burger.open::before {
  top: 50%;
  transform: translateX(-50%) rotate(45deg);
}

.burger.open::after {
  top: 50%;
  bottom: auto;
  transform: translateX(-50%) rotate(-45deg);
}

.burger.open .icon-left {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.5);
}

/* icon-right не используется, оставляем выключенным */
.burger .icon-right {
  display: none;
}

/* ===========================
   MOBILE MENU
=========================== */

.mobile__menu {
  display: none;
}

/* off-canvas навигация */

@media (max-width: 1024px) {
  .nav {
    display: none;
  }

  .burger {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .mobile__menu {
    display: block;
  }

  .header__nav {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100dvh;
    background:
      radial-gradient(circle at 0 0, rgba(77, 243, 255, 0.25), transparent 60%),
      radial-gradient(circle at 100% 0, rgba(255, 79, 216, 0.25), transparent 60%),
      linear-gradient(180deg, #020412 0%, #02030a 100%);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    z-index: 50;
    transform: translateX(-120%);
    transition: transform 0.35s ease;
    display: flex;
    flex-direction: column;
  }

  .header__nav > ul {
    margin-left: 24px;
    justify-content: center;
    flex-direction: column;
    align-items: flex-start;
    gap: 26px;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
  }

  .hero-inner{
    gap: 0;
  }

.hero .btn--ghost {
  display: none;
}

  .header__nav > ul a {
    font-size: 18px;
    color: var(--text-main);
  }

  /* CTA-кнопка в моб.меню */
  .header__nav > a {
    display: inline-block !important;
    margin: auto 24px 36px;
    max-width: 90%;
    text-align: center;
    color: #050814 !important;
    background: linear-gradient(120deg, var(--accent-2), var(--accent));
    border-radius: 999px;
    padding: 12px 18px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.18em;
  }

  .navOpen {
    transform: translateX(0%);
  }

  header .btn {
    display: none;
  }
}

/* ===========================
   ACCESSIBILITY & MOTION
=========================== */

.header__nav > ul a:focus-visible,
.burger:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .burger,
  .burger * {
    transition: none !important;
  }
  .header__nav {
    transition: none !important;
  }
}