/* Header styles for BlackTableAMS */

.bt-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: linear-gradient(90deg, #05030b 0%, #0b0220 45%, #1a002d 100%);
  color: #f5f3ff;
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(173, 109, 255, 0.35);
}

.bt-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.bt-header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.bt-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
}

.bt-header__logo-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.75rem;
  background: radial-gradient(circle at 20% 0%, #ff3366 0%, #7b2cff 45%, #00e5ff 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Rajdhani", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 1rem;
  color: #05030b;
  box-shadow: 0 0 18px rgba(123, 44, 255, 0.8);
}

.bt-header__logo-text {
  font-family: "Rajdhani", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.95rem;
  color: #fdfbff;
}

/* Navigation */

.bt-header__nav {
  display: flex;
}

.bt-header__nav-list {
  list-style: none;
  display: flex;
  gap: 1rem;
  padding: 0;
  margin: 0;
}

.bt-header__nav-item {
  position: relative;
}

.bt-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.25rem;
  font-family: "Montserrat", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #f1e6ff;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.bt-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.1rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #ff3366, #ff0066, #00e5ff);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease-out;
}

.bt-header__nav-link:hover::after,
.bt-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.bt-header__nav-link:hover,
.bt-header__nav-link:focus-visible {
  color: #ffffff;
}

.bt-header__nav-link:focus-visible {
  outline: 2px solid #ff3366;
  outline-offset: 3px;
}

.bt-header__nav-item--cta .bt-header__nav-link--cta {
  padding: 0.4rem 0.95rem;
  border-radius: 999px;
  background: radial-gradient(circle at 0 0, #ff3366 0%, #7b2cff 40%, #00e5ff 100%);
  box-shadow: 0 0 16px rgba(255, 51, 102, 0.75);
  color: #05030b;
}

.bt-header__nav-item--cta .bt-header__nav-link--cta::after {
  display: none;
}

.bt-header__nav-item--cta .bt-header__nav-link--cta:hover,
.bt-header__nav-item--cta .bt-header__nav-link--cta:focus-visible {
  filter: brightness(1.1);
}

/* Mobile menu toggle */

.bt-header__menu-toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(123, 44, 255, 0.7);
  background: radial-gradient(circle at 30% 0%, #1b073c 0%, #05030b 55%, #1b073c 100%);
  cursor: pointer;
  padding: 0.5rem;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 0.25rem;
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.45);
}

.bt-header__menu-toggle-bar {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #ff3366, #7b2cff, #00e5ff);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.bt-header__menu-toggle:focus-visible {
  outline: 2px solid #00e5ff;
  outline-offset: 3px;
}

.bt-header__menu-toggle--open .bt-header__menu-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.bt-header__menu-toggle--open .bt-header__menu-toggle-bar:nth-child(2) {
  opacity: 0;
}

.bt-header__menu-toggle--open .bt-header__menu-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Responsive behavior */

@media (max-width: 768px) {
  .bt-header__inner {
    padding: 0.6rem 1rem;
  }

  .bt-header__menu-toggle {
    display: inline-flex;
  }

  .bt-header__nav {
    position: fixed;
    inset: 0 0 auto auto;
    top: 3.5rem;
    right: 0.75rem;
    width: min(80vw, 18rem);
    max-height: calc(100vh - 4rem);
    background: radial-gradient(circle at 0 0, rgba(255, 0, 102, 0.3) 0%, #05030b 45%, #05030b 100%);
    border-radius: 1rem;
    border: 1px solid rgba(123, 44, 255, 0.85);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.85);
    padding: 0.75rem 0.5rem;
    transform: translateY(-1rem);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
  }

  .bt-header__nav-list {
    flex-direction: column;
    gap: 0.25rem;
  }

  .bt-header__nav-item--cta {
    margin-top: 0.25rem;
  }

  .bt-header__nav-link {
    width: 100%;
    padding: 0.65rem 0.75rem;
    border-radius: 0.65rem;
  }

  .bt-header__nav-link::after {
    display: none;
  }

  .bt-header__nav-link:hover,
  .bt-header__nav-link:focus-visible {
    background: linear-gradient(90deg, rgba(255, 51, 102, 0.35), rgba(0, 229, 255, 0.25));
  }

  .bt-header__nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .bt-header__nav-item--cta .bt-header__nav-link--cta {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bt-header,
  .bt-header * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}