/* header.css — Cartouche wordmark header (72px sticky, asymmetric 16/4/16/4 radius) */

.site-header {
  position: sticky;
  top: 0;
  background: var(--c-bg);
  z-index: 100;
  border-bottom: 1px solid var(--c-border);
  height: var(--header-h);
  display: flex;
  align-items: center;
}

.site-header > .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cartouche {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  text-decoration: none;
}

.cartouche__wordmark {
  font-family: var(--f-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--c-text);
  text-decoration: none;
  border: 1px solid var(--c-border-hi);
  border-radius: 16px 4px 16px 4px; /* cartouche signature — asymmetric */
  padding: 4px 16px;
  line-height: 1.1;
  letter-spacing: 0.01em;
}

.cartouche__suffix {
  font-family: var(--f-mono);
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--c-text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav ul {
  display: flex;
  gap: var(--s-24);
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-family: var(--f-body);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--c-text);
  text-decoration: none;
  position: relative;
  padding: var(--s-8) 0;
  display: inline-block;
}

.main-nav a:hover {
  color: var(--c-accent);
}

.main-nav a:hover::after,
.main-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  transform: translateX(-50%);
  width: 18px;
  height: 1px;
  background: var(--c-accent-sec);
}

.main-nav a.is-active {
  color: var(--c-accent);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 0;
  cursor: pointer;
  position: relative;
  padding: 0;
}
.nav-toggle span {
  display: block;
  position: absolute;
  left: 50%;
  width: 22px;
  height: 2px;
  background: var(--c-accent-sec);
  margin-left: -11px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), top var(--dur) var(--ease);
}
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 25px; }

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  top: 19px;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  top: 19px;
  transform: rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--c-special);
  z-index: 200;
  padding: 0;
  display: flex;
  flex-direction: column;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.mobile-nav[aria-hidden="false"] {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--s-24);
  height: var(--header-h);
  flex-shrink: 0;
  border-bottom: 1px solid var(--c-border);
  background: var(--c-special);
  position: sticky;
  top: 0;
  z-index: 1;
}

.mobile-nav__close {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-accent-sec);
  cursor: pointer;
  border: 1px solid var(--c-border-hi);
  border-radius: var(--r-md);
  background: transparent;
  padding: 0;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.mobile-nav__close:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}

.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: var(--s-32) var(--s-24) var(--s-48);
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
}
.mobile-nav a {
  display: block;
  font-family: var(--f-heading);
  font-weight: 700;
  font-size: 1.375rem;
  color: var(--c-text);
  text-decoration: none;
  padding: var(--s-12) 0;
  border-bottom: 1px dotted var(--c-border-hi);
}
.mobile-nav a:hover,
.mobile-nav a.is-active {
  color: var(--c-accent);
}

@media (max-width: 1023px) {
  .main-nav { display: none; }
  .nav-toggle { display: inline-flex; flex-direction: column; justify-content: center; align-items: center; }
}

@media (min-width: 1024px) {
  .mobile-nav { display: none; }
}

@media (max-width: 480px) {
  .cartouche__wordmark { font-size: 1.25rem; padding: 3px 12px; }
  .cartouche__suffix { display: none; }
}