/* Papermarkeet Header Styles */

.pm-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-bg);
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
  backdrop-filter: blur(12px);
}

.pm-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-10);
  padding-bottom: var(--space-10);
}

/* Brand */
.pm-header__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

.pm-header__logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 30% 70% 65% 35% / 40% 30% 70% 60%;
  background: radial-gradient(circle at 30% 30%, var(--color-primary-soft), var(--color-primary));
  box-shadow: var(--shadow-sm);
}

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

/* Nav layout */
.pm-header__nav {
  display: flex;
}

.pm-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.pm-header__nav-link {
  position: relative;
  padding: 0.25rem 0;
  font-size: var(--font-size-sm);
  color: var(--color-muted-text);
  transition: color var(--transition-base);
}

.pm-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-primary-strong);
  transition: width var(--transition-base);
}

.pm-header__nav-link:hover,
.pm-header__nav-link:focus-visible {
  color: var(--color-text);
}

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

/* Mobile toggle */
.pm-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-gray-200);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
}

.pm-header__toggle:hover {
  background-color: var(--color-gray-100);
}

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

.pm-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-gray-700);
  transition: transform var(--transition-base), opacity var(--transition-base), width var(--transition-base);
}

/* Mobile menu closed by default on small screens (enhanced with JS) */
@media (max-width: 768px) {
  .pm-header__inner {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
  }

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

  .pm-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    transform-origin: top;
    background-color: var(--color-bg);
    border-bottom: 1px solid rgba(148, 163, 184, 0.25);
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.08);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    transition: opacity var(--transition-base), max-height var(--transition-base), visibility var(--transition-base);
  }

  .pm-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-8) var(--space-16) var(--space-16);
    gap: var(--space-6);
  }

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

  /* Open state controlled via .pm-header--nav-open set by JS */
  .pm-header.pm-header--nav-open .pm-header__nav {
    max-height: 320px;
    opacity: 1;
    visibility: visible;
  }

  .pm-header.pm-header--nav-open .pm-header__toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .pm-header.pm-header--nav-open .pm-header__toggle-bar:nth-child(2) {
    opacity: 0;
    width: 0;
  }

  .pm-header.pm-header--nav-open .pm-header__toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

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