/* Header styles for Chans Onlive - builds on base.css */

.co-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(248, 243, 233, 0.96), rgba(248, 243, 233, 0.88));
  border-bottom: 1px solid var(--color-border-subtle);
}

.co-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);
}

/* Brand area */
.co-header__brand {
  display: flex;
  align-items: center;
}

.co-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
}

.co-header__logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-brown));
  box-shadow: 0 4px 0 rgba(75, 58, 43, 0.25);
  position: relative;
}

.co-header__logo-mark::before,
.co-header__logo-mark::after {
  content: "";
  position: absolute;
  border-radius: 2px;
  background-color: rgba(255, 250, 242, 0.92);
}

/* Simple pixel-art farm motif */
.co-header__logo-mark::before {
  left: 4px;
  right: 4px;
  bottom: 6px;
  height: 7px;
}

.co-header__logo-mark::after {
  width: 9px;
  height: 9px;
  left: 50%;
  top: 7px;
  transform: translateX(-50%);
  box-shadow: 0 6px 0 rgba(243, 235, 221, 0.9);
}

.co-header__title-group {
  display: flex;
  flex-direction: column;
}

.co-header__site-name {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.co-header__tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* Navigation */
.co-header__nav {
  display: flex;
}

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

.co-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-800);
  padding: 0.25rem 0;
}

.co-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.15rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent-pink), var(--color-accent-blue));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

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

/* Menu toggle (mobile) */
.co-header__menu-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(255, 250, 242, 0.95);
  color: var(--gray-900);
}

.co-header__menu-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 20px;
  height: 18px;
}

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

.co-header__menu-toggle-text {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* Mobile state when menu is open */
.co-header__menu-toggle[aria-expanded="true"] .co-header__menu-line--top {
  transform: translateY(5px) rotate(45deg);
}

.co-header__menu-toggle[aria-expanded="true"] .co-header__menu-line--middle {
  opacity: 0;
}

.co-header__menu-toggle[aria-expanded="true"] .co-header__menu-line--bottom {
  transform: translateY(-5px) rotate(-45deg);
}

/* Responsive layout */
@media (max-width: 768px) {
  .co-header__inner {
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
  }

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

  .co-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    transform-origin: top;
    background: linear-gradient(to bottom, rgba(255, 250, 242, 0.98), rgba(243, 235, 221, 0.98));
    border-bottom: 1px solid var(--color-border-subtle);
    box-shadow: var(--shadow-soft);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
  }

  .co-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-3) var(--space-4) var(--space-4);
    gap: var(--space-2);
  }

  .co-header__nav-link {
    width: 100%;
    padding: 0.4rem 0;
  }

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

  .co-header__nav--open {
    max-height: 400px;
  }
}

@media (max-width: 540px) {
  .co-header__site-name {
    font-size: 1rem;
  }

  .co-header__tagline {
    display: none;
  }
}