/* Header-specific styles for ES-TF Ewa Sobańska */

.header-shell {
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

/* Brand */

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

.brand-mark {
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 0.9rem;
  background: radial-gradient(circle at 20% 0, rgba(249, 115, 22, 0.8), transparent 55%),
              radial-gradient(circle at 80% 100%, rgba(56, 189, 248, 0.4), transparent 55%),
              rgba(15, 23, 42, 0.85);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.brand-chip {
  position: absolute;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
}

.brand-chip-primary {
  background-color: var(--color-primary);
  top: 0.3rem;
  left: 0.35rem;
}

.brand-chip-secondary {
  background-color: var(--color-success);
  bottom: 0.3rem;
  right: 0.35rem;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: #f9fafb;
}

.brand-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */

.primary-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav-item-cta {
  margin-left: var(--space-4);
}

.nav-cta {
  font-size: var(--font-size-sm);
}

/* Mobile toggle */

.nav-toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.4);
  background-color: rgba(15, 23, 42, 0.9);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 0.3rem;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 1.2rem;
  height: 2px;
  border-radius: 999px;
  background-color: #e5e7eb;
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Responsive behaviour */

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: radial-gradient(circle at top, rgba(249, 115, 22, 0.22), transparent 55%),
                linear-gradient(to bottom, #020617, #020617 85%);
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-4px);
    transition: max-height var(--transition-slow), opacity var(--transition-slow), transform var(--transition-slow);
  }

  .primary-nav.is-open {
    max-height: 20rem;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-4) var(--space-5);
    gap: var(--space-3);
  }

  .nav-item-cta {
    width: 100%;
    margin-left: 0;
    margin-top: var(--space-2);
  }

  .nav-cta {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .brand-subtitle {
    display: none;
  }
}

@media (min-width: 961px) {
  .primary-nav {
    position: static;
    max-height: none !important;
    opacity: 1 !important;
    transform: none !important;
    border-bottom: none;
    background: transparent;
  }
}