.pf-ai {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 100000;
  pointer-events: auto;
  font-family: "Inter", -apple-system, sans-serif;
}

.pf-ai-fab {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  border: 1px solid rgba(99, 140, 255, 0.35);
  background: linear-gradient(135deg, var(--accent, #6366f1), var(--accent2, #8b5cf6));
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.45);
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.pf-ai-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(99, 102, 241, 0.35);
}

.pf-ai-fab[aria-expanded="true"] {
  border-radius: 14px;
  background: var(--panel, rgba(14, 20, 36, 0.95));
  color: var(--text, #e8edf7);
  font-size: 1.1rem;
}

.pf-ai-panel {
  position: absolute;
  right: 0;
  bottom: 68px;
  width: min(380px, calc(100vw - 32px));
  max-height: min(520px, calc(100vh - 120px));
  display: flex;
  flex-direction: column;
  border-radius: 16px;
  border: 1px solid rgba(99, 140, 255, 0.28);
  background: var(--panel, rgba(12, 16, 28, 0.97));
  backdrop-filter: blur(12px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}

.pf-ai-panel[hidden] {
  display: none !important;
}

.pf-ai-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(99, 140, 255, 0.18);
}

.pf-ai-head h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
}

.pf-ai-head p {
  margin: 2px 0 0;
  font-size: 0.72rem;
  color: var(--dim, #7b8aa8);
}

.pf-ai-tier {
  flex-shrink: 0;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid rgba(99, 140, 255, 0.25);
}

.pf-ai-tier-basic {
  color: var(--dim, #94a3b8);
  background: rgba(10, 15, 26, 0.7);
}

.pf-ai-tier-pro {
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.45);
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.15);
}

.pf-ai-tier-premium {
  color: #fde68a;
  background: rgba(251, 191, 36, 0.12);
  border-color: rgba(251, 191, 36, 0.5);
  box-shadow: 0 0 14px rgba(251, 191, 36, 0.2);
}

.pf-ai-tier-dev-unlock {
  color: #e9d5ff;
  background: rgba(139, 92, 246, 0.18);
  border-color: rgba(167, 139, 250, 0.55);
  box-shadow: 0 0 14px rgba(139, 92, 246, 0.25);
}

.pf-ai-msgs {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pf-ai-msg {
  max-width: 92%;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.84rem;
  line-height: 1.5;
  word-break: break-word;
}

.pf-ai-msg.user {
  align-self: flex-end;
  background: rgba(99, 102, 241, 0.22);
  border: 1px solid rgba(99, 140, 255, 0.25);
}

.pf-ai-msg.bot {
  align-self: flex-start;
  background: rgba(10, 15, 26, 0.85);
  border: 1px solid rgba(99, 140, 255, 0.12);
}

.pf-ai-msg.bot strong {
  color: var(--gold, #fbbf24);
  font-weight: 600;
}

.pf-ai-msg.bot code {
  font-size: 0.8rem;
  background: rgba(0, 0, 0, 0.35);
  padding: 1px 5px;
  border-radius: 4px;
}

.pf-ai-msg.bot a {
  color: var(--accent, #818cf8);
}

.pf-ai-msg.bot ul {
  margin: 6px 0 0;
  padding-left: 18px;
}

.pf-ai-msg.bot li {
  margin: 4px 0;
}

.pf-ai-typing {
  align-self: flex-start;
  font-size: 0.78rem;
  color: var(--dim, #7b8aa8);
  padding: 4px 0;
}

.pf-ai-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0 16px 10px;
}

.pf-ai-chip {
  font-size: 0.72rem;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid rgba(99, 140, 255, 0.22);
  background: rgba(10, 15, 26, 0.6);
  color: var(--dim, #94a3b8);
  cursor: pointer;
}

.pf-ai-chip:hover {
  border-color: rgba(99, 140, 255, 0.45);
  color: var(--text, #e8edf7);
}

.pf-ai-form {
  display: flex;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid rgba(99, 140, 255, 0.18);
}

.pf-ai-form input {
  flex: 1;
  border-radius: 10px;
  border: 1px solid rgba(99, 140, 255, 0.22);
  background: rgba(6, 8, 15, 0.9);
  color: var(--text, #e8edf7);
  padding: 10px 12px;
  font-size: 0.84rem;
  outline: none;
}

.pf-ai-form input:focus {
  border-color: rgba(99, 140, 255, 0.5);
}

.pf-ai-form button {
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--accent, #6366f1), var(--accent2, #8b5cf6));
  color: #fff;
  padding: 10px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.pf-ai-form button:disabled {
  opacity: 0.55;
  cursor: wait;
}

.pf-ai-pricing-strip {
  margin: 20px 0 28px;
  border-color: rgba(99, 140, 255, 0.32) !important;
}

.pf-ai-pricing-strip-featured {
  background: linear-gradient(145deg, rgba(12, 18, 36, 0.95), rgba(8, 10, 20, 0.98));
  box-shadow: 0 0 0 1px rgba(99, 140, 255, 0.12), 0 12px 40px rgba(0, 0, 0, 0.35);
}

.pf-ai-pricing-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-radius: 999px;
  padding: 4px 10px;
  margin-bottom: 10px;
}

.pf-ai-pricing-hero h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  line-height: 1.35;
}

.pf-ai-pricing-hero p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--dim, #94a3b8);
  line-height: 1.55;
  max-width: 62ch;
}

.pf-ai-speed-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 4px;
}

.pf-ai-speed {
  font-size: 0.78rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.pf-ai-speed-basic {
  color: #cbd5e1;
  background: rgba(148, 163, 184, 0.12);
  border-color: rgba(148, 163, 184, 0.28);
}

.pf-ai-speed-pro {
  color: #93c5fd;
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.35);
}

.pf-ai-speed-premium {
  color: #fcd34d;
  background: rgba(251, 191, 36, 0.1);
  border-color: rgba(251, 191, 36, 0.38);
}

.pf-ai-tier-speed-note {
  font-size: 0.75rem !important;
  color: #64748b !important;
  margin: 0 0 6px !important;
  font-weight: 600;
}

.pf-ai-pricing-foot {
  margin: 14px 0 0;
  font-size: 0.82rem;
  color: var(--dim, #94a3b8);
}

.pf-ai-pricing-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.pf-ai-hero-callout {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(99, 140, 255, 0.28);
  background: rgba(15, 23, 42, 0.65);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
}

.pf-ai-hero-callout p {
  margin: 0;
  flex: 1 1 220px;
  font-size: 0.9rem;
  color: var(--dim, #94a3b8);
  line-height: 1.5;
}

.pf-ai-hero-callout strong {
  color: #e2e8f0;
}

.pf-ai-nav-btn {
  font-size: 0.88rem;
}

.pf-ai-pricing-strip-head h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.pf-ai-pricing-strip-head p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--dim, #94a3b8);
}

.pf-ai-tier-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.pf-ai-tier-card {
  border-radius: 12px;
  padding: 14px;
  border: 1px solid rgba(99, 140, 255, 0.18);
  background: rgba(8, 12, 22, 0.75);
  font-size: 0.82rem;
}

.pf-ai-tier-card strong {
  display: block;
  margin: 6px 0 4px;
  font-size: 0.9rem;
}

.pf-ai-tier-card p {
  margin: 0;
  color: var(--dim, #94a3b8);
  line-height: 1.45;
}

.pf-ai-tier-card-basic {
  border-color: rgba(148, 163, 184, 0.25);
}

.pf-ai-tier-card-pro {
  border-color: rgba(59, 130, 246, 0.35);
}

.pf-ai-tier-card-premium {
  border-color: rgba(251, 191, 36, 0.4);
}

.pf-ai-open-btn {
  margin-top: 4px;
}

@media (max-width: 480px) {
  .pf-ai {
    right: 12px;
    bottom: 12px;
  }
  .pf-ai-panel {
    width: calc(100vw - 24px);
  }
}