/* ========== NNS · Layout ========== */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  width: 38px; height: 38px;
  filter: drop-shadow(0 2px 6px rgba(109, 40, 217, 0.35));
}
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-title {
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  margin-top: 4px;
}

.topnav { display: flex; gap: var(--space-2); }
.nav-link {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 500;
  transition: all 180ms var(--ease);
}
.nav-link:hover { color: var(--text); background: var(--surface); }
.nav-link.active {
  color: var(--text);
  background: var(--accent-soft);
  border-color: var(--accent-ring);
}
.topbar-actions { display: flex; gap: var(--space-2); }

#app {
  max-width: 860px;
  margin: 0 auto;
  padding: var(--space-7) var(--space-6) var(--space-8);
}
.view { animation: viewIn 320ms var(--ease) both; }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.view-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.view-title {
  font-size: 2.25rem;
  letter-spacing: -0.025em;
}
.view-sub {
  color: var(--text-dim);
  margin: 6px 0 0;
  font-size: 0.95rem;
}
.view-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

.hero {
  text-align: center;
  margin: var(--space-7) auto var(--space-6);
  max-width: 720px;
}
.hero-logo {
  width: 140px; height: auto;
  margin: var(--space-5) auto;
  display: block;
  filter: drop-shadow(0 4px 20px rgba(109, 40, 217, 0.35));
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  line-height: 1.02; font-weight: 400;
  letter-spacing: -0.03em;
}
.hero-title em {
  font-style: italic;
  color: var(--accent-2);
  font-weight: 500;
}
.hero-sub {
  color: var(--text-dim);
  font-size: 1.1rem;
  margin-top: var(--space-3);
  max-width: 520px;
  margin-inline: auto;
}

.footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  border-top: 1px solid var(--border);
}
.footer a { color: var(--text-faint); text-decoration: none; transition: color 180ms var(--ease); }
.footer a:hover { color: var(--accent-2); }
.footer span { color: var(--text-faint); opacity: 0.5; }

/* Test warning banner */
.test-banner {
  background: color-mix(in oklab, var(--warning) 14%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--warning) 30%, transparent);
  color: var(--warning);
  text-align: center;
  padding: 8px var(--space-4);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

@media (max-width: 820px) {
  #app { padding: var(--space-5) var(--space-4); }
  .topbar { padding: var(--space-3) var(--space-4); }
  .brand-sub { display: none; }
  .topnav { gap: 0; }
  .nav-link { padding: 6px 10px; font-size: 0.8rem; }
}