/* ─── HEADER ─────────────────────────── */
header {
  position: sticky; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 5vw;
  background: rgba(63, 64, 64, 0.45);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
}

/* Logo */
.logo-link {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-link img {
  height: 46px; width: auto;
  display: block;
  border-radius: 6px;
}
.logo-text {
  font-family: var(--f-display);
  font-size: 22px; font-weight: 700;
  color: #fff; letter-spacing: 0.02em;
  line-height: 1.1;
}
.logo-text span { color: var(--c-red); }

/* Nav */
nav.main-nav { display: flex; align-items: center; }
.nav-links {
  display: flex; align-items: center; gap: 4px;
  list-style: none;
}
.nav-links a {
  position: relative;
  display: inline-block;
  color: #6296fd;
  text-decoration: none;
  font-size: 14px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  padding: 10px 16px;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 16px; right: 16px; bottom: 6px;
  height: 2px;
  background: var(--c-red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.04); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color: #fff; }
.nav-links a.active::after { transform: scaleX(1); }


/* ─── HAMBURGER (mobile) ─────────────── */
.hamburger {
  display: none;
  flex-direction: column; justify-content: center; gap: 5px;
  width: 38px; height: 38px;
  border-radius: 6px;
  border: 1px solid var(--c-border);
  background: transparent;
  cursor: pointer;
  padding: 0;
}
.hamburger span {
  display: block; width: 18px; height: 2px;
  background: var(--c-text); margin: 0 auto;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── RESPONSIVE ─────────────────────── */
@media (max-width: 860px) {
  .hamburger { display: flex; }

  nav.main-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(11,14,19,0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    z-index: 998;
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1),
                opacity 0.3s ease;
    opacity: 0;
    pointer-events: none;
  }

  nav.main-nav.open {
    max-height: 100vh;
    opacity: 1;
    pointer-events: all;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 5vw 8px;
  }

  .nav-links li {
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    font-size: 16px;
    font-weight: 600;
    padding: 16px 4px;
    border-radius: 0;
    color: rgba(255,255,255,0.82);
    letter-spacing: 0.04em;
    display: block;
  }

  .nav-links a::after { display: none; }

  .nav-links a:hover,
  .nav-links a.active {
    color: var(--c-red-hi);
    background: transparent;
  }

  /* Hamburger → X animation */
  .hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}