/* Header-specific styles for iTR Konrad Kowalczyk */

.header {
  background-color: #ffffff;
  backdrop-filter: blur(10px);
}

.header__inner {
  gap: var(--space-4);
}

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

.header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.header__logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: radial-gradient(circle at 0 0, var(--color-primary-light), transparent 55%),
    linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  box-shadow: var(--shadow-md);
}

.header__logo-text {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-primary-dark);
  white-space: nowrap;
}



.header__nav-list {
  align-items: center;
}

.header__nav-link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--gray-700);
  padding-bottom: 0.35rem;
}

.header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
  border-radius: 999px;
  transition: width var(--transition-normal);
}

.header__nav-link:hover::after,
.header__nav-link:focus-visible::after {
  width: 100%;
}

.header__nav-link:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 4px;
}

/* Active link modifier (to be added server-side) */
.header__nav-link--active {
  color: var(--color-primary-dark);
}

.header__nav-link--active::after {
  width: 100%;
}

/* Mobile toggle button */
.header__toggle {
  background-color: #ffffff;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.header__toggle:hover {
  background-color: var(--gray-50);
  box-shadow: var(--shadow-sm);
}

.header__toggle:focus-visible {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 2px;
}

.header__toggle-icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 18px;
}

.header__toggle-line {
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background-color: var(--gray-800);
  transition: transform var(--transition-normal), opacity var(--transition-normal), width var(--transition-normal);
}

/* Mobile navigation layout */
@media (max-width: 959.98px) {
  .header__inner {
    justify-content: space-between;
  }

  .header__nav {
    position: fixed;
    inset-inline: 0;
    top: var(--header-height);
    background-color: rgba(15, 23, 42, 0.86);
    backdrop-filter: blur(12px);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
  }

  .header__nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-4);
    gap: var(--space-2);
  }

  .header__nav-link {
    display: block;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-md);
    color: #e5e7eb;
  }

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

  .header__nav-link:hover,
  .header__nav-link:focus-visible {
    background-color: rgba(37, 99, 235, 0.24);
  }

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

  .header__nav--open .header__nav-list {
    max-width: var(--container-max-width);
    margin: 0 auto;
  }

  /* Animate hamburger to "X" when open */
  .header__toggle[aria-expanded="true"] .header__toggle-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .header__toggle[aria-expanded="true"] .header__toggle-line:nth-child(2) {
    opacity: 0;
  }

  .header__toggle[aria-expanded="true"] .header__toggle-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* Desktop adjustments */
@media (min-width: 960px) {
  .header__inner {
    justify-content: space-between;
  }

  .header__nav-list {
    gap: var(--space-5);
  }
}