/* ══════════════════════════════════════════════════════
   AppHeader — Manus-inspired custom titlebar
   48px tall · glass-dark · full drag region · custom WinControls
   ══════════════════════════════════════════════════════ */

.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: 48px;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0 8px 0 10px;

  /* Manus-dark glass */
  background: rgba(13, 13, 17, 0.90);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.055);
  box-shadow: 0 1px 0 rgba(255,255,255,0.03), 0 4px 28px rgba(0,0,0,0.5);

  /* enable drag: the region itself is draggable; interactive children opt-out */
  user-select: none;
  -webkit-user-select: none;
}

/* ── Left ── */
.app-header-left {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

/* ── Center ── */
.app-header-center {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  /* stop drag so user can interact with the pill */
  -webkit-app-region: no-drag;
  app-region: no-drag;
}

/* ── Right ── */
.app-header-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: flex-end;
}

/* ── Hamburger ── */
.header-nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: rgba(255,255,255,0.45);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
  -webkit-app-region: no-drag;
  app-region: no-drag;
}
.header-nav-btn:hover { background: rgba(255,255,255,0.07); color: rgba(255,255,255,0.9); }
.header-nav-btn.active { background: rgba(124,58,237,0.18); color: #a78bfa; }

/* Back button — slightly wider to fit the arrow */
.header-back-btn { width: 34px; gap: 3px; }
.header-back-btn:hover { background: rgba(255,255,255,0.07); color: rgba(255,255,255,0.9); }

/* ── Brand ── */
.header-brand {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}

.header-brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 8px rgba(124,58,237,0.45));
}

.header-brand-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.2px;
  background: linear-gradient(135deg, #e2d9f3 0%, #c4b5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

/* ── Breadcrumb ── */
.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  overflow: hidden;
}
.header-breadcrumb-sep {
  color: rgba(255,255,255,0.18);
  font-size: 13px;
  flex-shrink: 0;
}
.header-breadcrumb-title {
  font-size: 12.5px;
  color: rgba(255,255,255,0.38);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

/* ── Runtime status pill ── */
.header-status-pill {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px 3px 6px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
  cursor: default;
  transition: background 0.2s, color 0.2s;
  -webkit-app-region: no-drag;
  app-region: no-drag;
}
.header-status-pill.online  { background: rgba(16,185,129,0.1);  color: #6ee7b7; border: 1px solid rgba(16,185,129,0.18); }
.header-status-pill.offline { background: rgba(239,68,68,0.09);  color: #fca5a5; border: 1px solid rgba(239,68,68,0.18); }

:root {
  --status-online:  #10b981;
  --status-offline: #ef4444;
}

/* ── Live generation badge ── */
.header-live-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px;
  border-radius: 10px;
  background: rgba(99,102,241,0.14);
  border: 1px solid rgba(99,102,241,0.24);
  font-size: 11px;
  font-weight: 600;
  color: #a5b4fc;
  white-space: nowrap;
}
.header-live-pulse {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #818cf8;
  flex-shrink: 0;
  animation: hdr-pulse 1s ease-in-out infinite;
}
@keyframes hdr-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.35; transform: scale(0.7); }
}
.header-live-unit { font-weight: 400; opacity: 0.7; }

/* ── TPS badge ── */
.header-tps-badge {
  font-size: 11px;
  font-weight: 500;
  color: rgba(255,255,255,0.35);
  white-space: nowrap;
  cursor: default;
}
.header-tps-unit { font-size: 10px; opacity: 0.7; }

/* ── Icon buttons ── */
.header-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: rgba(255,255,255,0.38);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
  -webkit-app-region: no-drag;
  app-region: no-drag;
}
.header-icon-btn:hover  { background: rgba(255,255,255,0.07); color: rgba(255,255,255,0.85); }
.header-icon-btn:active { background: rgba(255,255,255,0.04); transform: scale(0.93); }

/* ── Window Controls ── */
.header-wincontrols {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 6px;
  padding-left: 6px;
  border-left: 1px solid rgba(255,255,255,0.06);
  -webkit-app-region: no-drag;
  app-region: no-drag;
}

.winctrl {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  flex-shrink: 0;
}
.winctrl:hover { background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.85); }
.winctrl:active { transform: scale(0.92); }

/* Close gets a red hover */
.winctrl-close:hover {
  background: rgba(239,68,68,0.18);
  color: #fca5a5;
}

/* ── Content offset ── */
.with-app-header { padding-top: 48px; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .app-header { padding: 0 4px 0 6px; }
  .header-tps-badge { display: none; }
  .header-breadcrumb-title { max-width: 90px; }
}
@media (max-width: 480px) {
  .header-breadcrumb { display: none; }
  .header-brand-name { display: none; }
}