/* ============================================================
   header.css — MoribundMurdoch header component
   ============================================================ */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;

  width: 100%;
  padding: 0.95rem 1.5rem;

  position: sticky;
  top: 0;
  z-index: 1000;

  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(
      180deg,
      rgba(8, 8, 12, 0.94) 0%,
      rgba(10, 10, 16, 0.86) 100%
    );
  backdrop-filter: blur(12px) saturate(1.15);
  -webkit-backdrop-filter: blur(12px) saturate(1.15);

  box-shadow:
    0 1px 0 var(--line),
    0 10px 30px rgba(0, 0, 0, 0.28);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;

  color: var(--text);
  text-decoration: none;
}

.brand:hover,
.brand:focus-visible {
  text-shadow: none;
  outline: none;
}

.brand-logo {
  width: 48px;
  height: 48px;
  display: block;
  object-fit: cover;
  object-position: center;
  border-radius: 999px;

  border: 1px solid var(--line-strong);
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.02),
    0 8px 20px rgba(0,0,0,0.28);

  transition:
    transform var(--dur-mid) var(--ease-out),
    border-color var(--dur-mid) var(--ease-out),
    box-shadow var(--dur-mid) var(--ease-out),
    opacity var(--dur-mid) var(--ease-out);
}

.brand:hover .brand-logo,
.brand:focus-visible .brand-logo {
  transform: translateY(-1px);
  border-color: var(--accent-dim);
  box-shadow:
    0 0 0 1px rgba(184,156,255,0.12),
    0 0 18px rgba(184,156,255,0.18),
    0 10px 24px rgba(0,0,0,0.3);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
}

.nav .pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 0.5rem 0.8rem;
  min-height: 2.3rem;

  border: 1px solid var(--line-strong);
  border-radius: 999px;

  background: rgba(255,255,255,0.025);
  color: var(--muted-soft);

  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.2;
  letter-spacing: 0.03em;
  white-space: nowrap;
  text-decoration: none;

  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.03),
    0 0 0 rgba(184,156,255,0);

  transition:
    transform var(--dur-fast) var(--ease-out),
    color var(--dur-mid) var(--ease-out),
    background var(--dur-mid) var(--ease-out),
    border-color var(--dur-mid) var(--ease-out),
    box-shadow var(--dur-mid) var(--ease-out);
}

.nav .pill:hover,
.nav .pill:focus-visible {
  color: var(--text);
  background: var(--accent-bg2);
  border-color: var(--accent-dim);
  transform: translateY(-1px);
  box-shadow:
    0 0 0 1px rgba(184,156,255,0.1),
    0 0 16px rgba(184,156,255,0.12),
    var(--shadow-sm);
  outline: none;
  text-shadow: none;
}

.nav .pill.active,
.nav .pill[aria-current="page"] {
  color: var(--accent-soft);
  background: var(--accent-bg);
  border-color: var(--accent);
  box-shadow:
    0 0 0 1px rgba(184,156,255,0.12),
    0 0 18px rgba(184,156,255,0.14);
}

.nav .pill.active:hover,
.nav .pill[aria-current="page"]:hover,
.nav .pill.active:focus-visible,
.nav .pill[aria-current="page"]:focus-visible {
  color: var(--text);
  background: var(--accent-bg2);
  border-color: var(--accent);
}

@media (max-width: 980px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .topbar {
    padding: 0.85rem 1rem;
    gap: 0.9rem;
  }

  .brand-logo {
    width: 42px;
    height: 42px;
  }

  .nav {
    gap: 0.4rem;
  }

  .nav .pill {
    font-size: 0.88rem;
    padding: 0.48rem 0.72rem;
  }
}