/* css/topbar.css - Modul B: Dual-State Topbar.
 * Nur Tokens aus dem :root-Block in index.html, keine eigenen Hex-Werte. */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 56px;
  padding: 0 16px;
  background: color-mix(in srgb, var(--surface-1) 70%, transparent);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-ghost);
  font-family: var(--font-body);
  color: var(--text-muted);
  transition: transform 220ms ease, opacity 220ms ease;
}

.topbar.is-autohidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

.tb-left,
.tb-center,
.tb-right {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.tb-center { flex: 1 1 auto; justify-content: center; }
.tb-right { justify-content: flex-end; flex-wrap: nowrap; }

.tb-logo {
  display: block;
  height: 22px;
  width: auto;
}

/* ---- Buttons ---------------------------------------------------------- */
.tb-btn,
.tb-seg-btn {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1;
  padding: 7px 12px;
  border-radius: var(--radius-field);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.tb-btn { border-color: var(--border-ghost); }

.tb-btn:hover,
.tb-seg-btn:hover {
  color: var(--text-primary);
  background: color-mix(in srgb, var(--surface-3) 70%, transparent);
}

.tb-btn:focus-visible,
.tb-seg-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--brand-soft);
}

/* Cut-Corner bleibt dem aktiven Segment und den CTA-Buttons vorbehalten. */
.tb-seg-btn[aria-pressed="true"],
.tb-btn.is-active {
  border-radius: var(--radius-btn);
  background: var(--btn-gradient);
  border-color: transparent;
  color: var(--btn-ink);
}

.tb-btn[aria-pressed="true"] {
  color: var(--text-primary);
  border-color: color-mix(in srgb, var(--brand-color) 55%, transparent);
  background: var(--brand-soft);
}

.tb-btn-audit {
  color: var(--brand-secondary);
  border-color: color-mix(in srgb, var(--brand-secondary) 45%, transparent);
  background: color-mix(in srgb, var(--brand-secondary) 12%, transparent);
}

.tb-btn-audit:hover {
  color: var(--brand-secondary);
  background: color-mix(in srgb, var(--brand-secondary) 22%, transparent);
}

/* ---- Segmente --------------------------------------------------------- */
.tb-segment {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border-ghost);
  border-radius: calc(var(--radius-field) + 4px);
  background: color-mix(in srgb, var(--surface-2) 60%, transparent);
}

.tb-themes .tb-seg-btn { font-size: 11px; padding: 6px 9px; }

/* ---- IHK-Leiste ------------------------------------------------------- */
.tb-ihk {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-left: 12px;
  border-left: 1px solid var(--border-ghost);
}

.tb-clock {
  font-family: var(--font-headline);
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  min-width: 4.4ch;
  text-align: center;
}

.tb-clock.is-urgent {
  color: var(--brand-secondary);
  animation: tb-pulse 1s ease-in-out infinite;
}

.tb-clock.is-over {
  color: var(--brand-secondary);
  animation: none;
}

@keyframes tb-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.tb-plan {
  font-size: 12px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--brand-color);
  padding: 5px 10px;
  border-radius: var(--radius-field);
  background: var(--brand-soft);
  white-space: nowrap;
}

.tb-plan.is-behind {
  color: var(--brand-secondary);
  background: color-mix(in srgb, var(--brand-secondary) 15%, transparent);
}

/* ---- Enges Viewport --------------------------------------------------- */
@media (max-width: 1280px) {
  .tb-themes .tb-seg-btn { padding: 6px 7px; }
  .tb-btn { padding: 7px 10px; }
}

@media (max-width: 1024px) {
  .tb-logo { height: 18px; }
  .tb-ihk { gap: 6px; padding-left: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  .topbar { transition: none; }
  .tb-clock.is-urgent { animation: none; }
}