/* Header styles for Eveningspectrum */

.es-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(9, 9, 11, 0.96), rgba(9, 9, 11, 0.88));
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.es-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-4);
}

.es-header__brand-wrapper {
  display: flex;
  align-items: center;
  min-width: 0;
}

.es-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.es-header__logo-mark {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.9rem;
  background:
    radial-gradient(circle at 20% 0%, rgba(6, 182, 212, 0.9), transparent 55%),
    radial-gradient(circle at 80% 100%, rgba(6, 182, 212, 0.4), transparent 60%),
    linear-gradient(145deg, #020617, #0b1120);
  box-shadow: var(--shadow-glow-primary);
  position: relative;
  overflow: hidden;
}

.es-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 35% 18%;
  border-radius: 999px;
  border: 2px solid rgba(15, 23, 42, 0.95);
}

.es-header__brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.es-header__brand-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.es-header__brand-tagline {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-text-muted);
}

/* Navigation */

.es-header__nav {
  display: flex;
  align-items: center;
}

.es-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.es-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.25rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-secondary);
}

.es-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

.es-header__nav-link:hover,
.es-header__nav-link:focus-visible {
  color: var(--color-primary);
}

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

.es-header__nav-item--cta .es-header__nav-link--cta {
  padding: 0.45rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: linear-gradient(135deg, #06b6d4 0%, #22d3ee 40%, #0ea5e9 100%);
  color: #020617;
  box-shadow: 0 14px 30px rgba(6, 182, 212, 0.55);
}

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

.es-header__nav-item--cta .es-header__nav-link--cta:hover,
.es-header__nav-item--cta .es-header__nav-link--cta:focus-visible {
  box-shadow: var(--shadow-glow-primary);
}

/* Mobile toggle */

.es-header__nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.95), rgba(2, 6, 23, 0.98));
  cursor: pointer;
  color: var(--color-text-primary);
}

.es-header__nav-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.es-header__nav-toggle-bar {
  width: 1.3rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text-secondary);
  transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-base);
}

/* Active (open) state for toggle */

.es-header__nav-toggle[aria-expanded="true"] .es-header__nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.es-header__nav-toggle[aria-expanded="true"] .es-header__nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.es-header__nav-toggle[aria-expanded="true"] .es-header__nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Responsive behaviour */

@media (max-width: 900px) {
  .es-header__nav-toggle {
    display: inline-flex;
  }

  .es-header__nav {
    position: fixed;
    inset: 3.5rem 0 auto 0;
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.98), rgba(9, 9, 11, 0.98));
    border-bottom: 1px solid rgba(148, 163, 184, 0.4);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }

  .es-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
    gap: var(--space-3);
  }

  .es-header__nav-link {
    font-size: 0.85rem;
    width: 100%;
  }

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

@media (max-width: 520px) {
  .es-header__brand-tagline {
    display: none;
  }
}