/* Header styles for Animal Care Mission */

.acm-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

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

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

.acm-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-gray-900);
}

.acm-header__logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, #f7f4ef 0, #f7f4ef 35%, #275437 36%, #3b7f4b 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.acm-header__logo-icon {
  position: relative;
  width: 18px;
  height: 18px;
}

.acm-header__logo-icon--paw::before,
.acm-header__logo-icon--paw::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background-color: #f7f4ef;
}

/* Paw pads */
.acm-header__logo-icon--paw::before {
  width: 60%;
  height: 60%;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.acm-header__logo-icon--paw::after {
  box-shadow:
    -6px -4px 0 0 #f7f4ef,
    0 -6px 0 0 #f7f4ef,
    6px -4px 0 0 #f7f4ef;
  width: 0;
  height: 0;
}

.acm-header__text {
  display: flex;
  flex-direction: column;
}

.acm-header__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--font-size-lg);
  line-height: var(--line-height-tight);
}

.acm-header__subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Navigation */

.acm-header__nav {
  margin-left: auto;
}

.acm-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
  margin: 0;
}

.acm-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-800);
  text-decoration: none;
  padding-block: 0.25rem;
}

.acm-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

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

.acm-header__nav-link--primary {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(59, 127, 75, 0.18);
  background-color: var(--color-primary-soft);
  color: var(--color-primary-strong);
}

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

.acm-header__nav-link--primary:hover {
  background-color: #cde7d4;
}

.acm-header__nav-item--primary {
  margin-left: var(--space-2);
}

/* Mobile toggle button */

.acm-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-300);
  background-color: var(--color-surface);
  color: var(--color-gray-900);
  cursor: pointer;
}

.acm-header__toggle:focus-visible {
  outline: 3px solid rgba(59, 127, 75, 0.6);
  outline-offset: 2px;
}

.acm-header__toggle-label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.acm-header__toggle-box {
  position: relative;
  width: 20px;
  height: 14px;
}

.acm-header__toggle-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-900);
  transition: transform var(--transition-normal), opacity var(--transition-fast), top var(--transition-normal), bottom var(--transition-normal);
}

.acm-header__toggle-line--top {
  top: 0;
}

.acm-header__toggle-line--middle {
  top: 50%;
  transform: translateY(-50%);
}

.acm-header__toggle-line--bottom {
  bottom: 0;
}

/* Toggle active (open menu) */

.acm-header--menu-open .acm-header__toggle-line--top {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
}

.acm-header--menu-open .acm-header__toggle-line--middle {
  opacity: 0;
}

.acm-header--menu-open .acm-header__toggle-line--bottom {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
}

/* Active link helper (can be added server-side) */

.acm-header__nav-link--active {
  color: var(--color-primary-strong);
}

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

/* Responsive */

@media (max-width: 960px) {
  .acm-header__subtitle {
    display: none;
  }
}

@media (max-width: 768px) {
  .acm-header__inner {
    align-items: center;
  }

  .acm-header__toggle {
    display: inline-flex;
  }

  .acm-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transform-origin: top;
    transition: max-height var(--transition-normal);
  }

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

  .acm-header__nav-item--primary {
    margin-left: 0;
    margin-top: var(--space-2);
    width: 100%;
  }

  .acm-header__nav-link--primary {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  /* Menu open state - class toggled by JS */
  .acm-header--menu-open .acm-header__nav {
    max-height: 420px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .acm-header__nav,
  .acm-header__toggle-line {
    transition: none !important;
  }
}