/* ============================================
   HEADER — fixed, backdrop-blur, neon emerald
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(6, 21, 10, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(43, 255, 124, 0.12);
}

.header_inner {
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.4rem var(--main-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* ===== Logo ===== */
.header_logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  text-transform: lowercase;
}

.header_logo > i {
  display: inline-block;
  width: 1.3rem;
  height: 1.3rem;
  background: var(--accent);
  transform: rotate(45deg);
  border-radius: 3px;
  box-shadow: 0 0 12px var(--accent);
}

.header_logo > span {
  color: var(--accent);
}

.header_logo:hover {
  color: var(--text);
}

/* ===== Nav ===== */
.header_nav > div > ul {
  display: flex;
  align-items: center;
  gap: 2.4rem;
  font-size: 2rem;
}

.header_nav > a {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 0.3rem 0;
}

.header_nav > a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.25s ease;
  box-shadow: 0 0 8px var(--accent);
}

.header_nav > a:hover {
  color: var(--accent);
}

.header_nav > a:hover::after {
  width: 100%;
}

/* ===== CTA — big ===== */
.header_cta_big {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.9rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--bg-dark);
  background: var(--accent);
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    background 0.25s ease;
}

.header_cta_big:hover {
  background: var(--accent-bright);
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

/* ===== Burger ===== */
.header_burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 0.5rem;
  width: 5rem;
  height: 5rem;
  padding: 0 1rem;
  background: transparent;
  border: 1px solid rgba(43, 255, 124, 0.3);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.header_burger > span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ===== Mobile menu (hidden on desktop) ===== */
.header_mobile {
  display: none;
  flex-direction: column;
  gap: 0.8rem;
  padding: 2rem var(--main-padding);
  background: rgba(6, 21, 10, 0.96);
  border-top: 1px solid rgba(43, 255, 124, 0.15);
}

.header_mobile > div > ul {
  display: flex;
  flex-direction: column;
  gap: 5rem;
}

.header_mobile > div > ul > li > a {
  font-size: 5.4rem;
  font-weight: 600;
  color: var(--text);
  padding: 1.2rem 0;
  border-bottom: 1px solid rgba(43, 255, 124, 0.08);
}

.header_mobile > a:last-child {
  border-bottom: none;
}

/* ============================================
   Mobile — ≤1024px
   ============================================ */
@media (max-width: 1024px) {
  .header_inner {
    padding: 2rem var(--main-padding);
  }

  .header_logo {
    font-size: 6.4rem;
  }

  .header_logo > i {
    width: 4.4rem;
    height: 4.4rem;
  }

  .header_nav {
    display: none;
  }

  .header_cta_big {
    display: none;
  }

  .header_burger {
    display: flex;
  }

  .header_burger {
    width: 14rem;
    height: 14rem;
    gap: 1.4rem;
    padding: 0 3rem;
  }

  .header_burger > span {
    height: 4px;
  }

  /* ===== Mobile CTA — bright filled accent button ===== */
  .header_mobile > a.header_mobile_cta {
    margin-top: 1.6rem;
    padding: 2.4rem 2rem;
    color: var(--bg-dark);
    background: var(--accent);
    border-radius: var(--radius-sm);
    border-bottom: none;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 800;
    font-size: 4rem;
    box-shadow: 0 0 28px rgba(43, 255, 124, 0.4);
    transition:
      background 0.25s ease,
      box-shadow 0.25s ease;
  }

  .header_mobile > a.header_mobile_cta:hover,
  .header_mobile > a.header_mobile_cta:active {
    background: var(--accent-bright);
    color: var(--bg-dark);
    box-shadow: 0 0 36px rgba(43, 255, 124, 0.55);
  }
}