/* ═══════════════════════════════════════════════════════
   Header & Navigation Bar
   ═══════════════════════════════════════════════════════ */

header {
  height: var(--header-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 22px;
  gap: 16px;
  flex-shrink: 0;
  position: relative;
  z-index: 10;
  backdrop-filter: blur(8px);
}

.logo {
  font-family: 'DM Sans', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: var(--accent);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.logo-icon {
  width: 30px; height: 30px;
  border: 1px solid color-mix(in srgb, var(--accent) 60%, var(--border2));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.12), inset 0 0 8px var(--glow);
  transition: box-shadow var(--duration) ease;
}
.logo:hover .logo-icon {
  box-shadow: 0 0 20px var(--glow-strong), inset 0 0 12px var(--glow);
}

.logo sub {
  font-size: 9px;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 400;
  letter-spacing: 2px;
}

.mol-title-wrap {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 8px;
}

.mol-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  max-width: 380px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: border-color var(--duration), color var(--duration), box-shadow var(--duration);
}
.mol-badge.loaded {
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 10px 24px rgba(92,200,255,0.10);
}

.mol-formula-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--accent);
  opacity: 0.82;
  display: none;
  transition: opacity var(--duration);
}
.mol-formula-badge.visible { display: block; }

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}