/* Header styles for Paperliine */

.pl-header {
  position: sticky;
  top: 0;
  z-index: 30;
  width: 100%;
  background-color: var(--color-bg);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04);
}

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

/* Brand / logo */

.pl-header__brand {
  display: flex;
  align-items: center;
}

.pl-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

.pl-header__logo:hover {
  color: var(--color-text);
}

.pl-header__logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background: radial-gradient(circle at 30% 20%, #ffffff 0, #ffffff 30%, #e0edf0 60%, #cbd5e1 100%);
  box-shadow: var(--shadow-sm);
}

.pl-header__logo-text {
  font-family: "DM Serif Display", var(--font-serif);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}

/* Navigation */

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

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

.pl-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.pl-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 0;
  height: 2px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.pl-header__nav-link:hover {
  color: var(--color-text);
}

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

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

/* Mobile toggle */

.pl-header__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-gray-200);
  background-color: var(--color-surface);
  color: var(--color-text);
}

.pl-header__toggle:hover {
  border-color: var(--color-gray-300);
  background-color: var(--color-gray-50);
}

.pl-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.pl-header__toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.pl-header__toggle-line {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

/* Open state */

.pl-header__toggle--open .pl-header__toggle-line:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}

.pl-header__toggle--open .pl-header__toggle-line:nth-child(2) {
  transform: translateY(-3px) rotate(-45deg);
}

/* Responsive behaviour */

@media (max-width: 768px) {
  .pl-header__toggle {
    display: inline-flex;
  }

  .pl-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: 0 8px 16px rgba(15, 23, 42, 0.06);
    transform-origin: top;
    transform: scaleY(0.95);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

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

  .pl-header__nav-item {
    width: 100%;
  }

  .pl-header__nav-link {
    width: 100%;
    padding: 0.5rem 0;
  }

  .pl-header__nav--open {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
  }
}

@media (min-width: 769px) {
  .pl-header__nav {
    position: static;
  }
}