/* ── AI Chat Widget ── */
#chat-widget {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 10000;
  font-family: var(--ui, system-ui, sans-serif);
}
#chat-bubble {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent, #6c63f5);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(108, 99, 245, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  z-index: 1;
}
#chat-bubble:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(108, 99, 245, 0.5);
}
#chat-bubble.open {
  background: var(--bg2, #1e1c1a);
  color: var(--text, #fff);
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
#chat-bubble .bubble-dot {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green, #22c55e);
  border: 2px solid var(--bg, #121210);
  display: none;
}
#chat-bubble .bubble-dot.show {
  display: block;
}

/* ── Panel ── */
#chat-panel {
  position: fixed;
  bottom: 80px;
  right: 20px;
  width: 420px;
  max-width: calc(100vw - 32px);
  height: 520px;
  max-height: calc(100vh - 120px);
  background: var(--bg, #121210);
  border: 1px solid var(--border, #2a2824);
  border-radius: 14px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
  display: none;
  flex-direction: column;
  overflow: hidden;
  animation: chatSlideUp 0.25s ease;
}
#chat-panel.open {
  display: flex;
}
@keyframes chatSlideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Header ── */
#chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border, #2a2824);
  background: var(--bg2, #1e1c1a);
  border-radius: 14px 14px 0 0;
}
#chat-header .ch-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text, #fff);
  display: flex;
  align-items: center;
  gap: 8px;
}
#chat-header .ch-title .ch-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green, #22c55e);
  animation: chPulse 2s infinite;
}
@keyframes chPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
#chat-header .ch-subtitle {
  font-size: 10px;
  color: var(--text3, #666);
  font-weight: 400;
  margin-top: 1px;
}
#chat-close {
  background: none;
  border: none;
  color: var(--text3, #666);
  cursor: pointer;
  font-size: 16px;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
#chat-close:hover {
  color: var(--text, #fff);
  background: var(--bg3, #2a2824);
}

/* ── Messages ── */
#chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}
#chat-messages::-webkit-scrollbar {
  width: 4px;
}
#chat-messages::-webkit-scrollbar-thumb {
  background: var(--border, #2a2824);
  border-radius: 4px;
}
.chat-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 12px;
  line-height: 1.55;
  word-wrap: break-word;
  white-space: pre-wrap;
}
.chat-msg.user {
  align-self: flex-end;
  background: var(--accent, #6c63f5);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.chat-msg.assistant {
  align-self: flex-start;
  background: var(--bg2, #1e1c1a);
  color: var(--text, #ddd);
  border: 1px solid var(--border, #2a2824);
  border-bottom-left-radius: 4px;
}
.chat-msg.system {
  align-self: center;
  background: transparent;
  color: var(--text3, #666);
  font-size: 10px;
  text-align: center;
  padding: 4px 10px;
  max-width: 90%;
}
.chat-msg.loading {
  align-self: flex-start;
  background: var(--bg2, #1e1c1a);
  color: var(--text3, #666);
  border: 1px solid var(--border, #2a2824);
  border-bottom-left-radius: 4px;
  display: flex;
  gap: 4px;
  align-items: center;
  min-height: 20px;
}
.chat-msg.loading span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text3, #666);
  animation: chBounce 1.4s infinite ease-in-out both;
}
.chat-msg.loading span:nth-child(1) { animation-delay: -0.32s; }
.chat-msg.loading span:nth-child(2) { animation-delay: -0.16s; }
@keyframes chBounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}
.chat-msg strong { color: var(--text, #fff); }
.chat-msg em { color: var(--text3, #aaa); }
.chat-msg code {
  background: var(--bg3, #2a2824);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 11px;
}

/* ── Input ── */
#chat-input-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-top: 1px solid var(--border, #2a2824);
  background: var(--bg2, #1e1c1a);
  border-radius: 0 0 14px 14px;
}
#chat-input {
  flex: 1;
  background: var(--bg3, #2a2824);
  border: 1px solid var(--border, #3a3834);
  border-radius: 10px;
  padding: 8px 14px;
  color: var(--text, #fff);
  font-size: 12px;
  font-family: var(--ui, system-ui, sans-serif);
  outline: none;
  resize: none;
  max-height: 80px;
  line-height: 1.4;
}
#chat-input:focus {
  border-color: var(--accent, #6c63f5);
}
#chat-input::placeholder {
  color: var(--text3, #555);
}
#chat-send {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent, #6c63f5);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, transform 0.15s;
}
#chat-send:hover {
  background: var(--accent2, #7c73ff);
  transform: scale(1.05);
}
#chat-send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Mobile ── */
@media (max-width: 480px) {
  #chat-widget {
    bottom: 12px;
    right: 12px;
  }
  #chat-panel {
    width: calc(100vw - 16px);
    right: 8px;
    bottom: 76px;
    height: 420px;
    max-height: calc(100vh - 140px);
    border-radius: 12px;
  }
  #chat-bubble {
    width: 44px;
    height: 44px;
    font-size: 20px;
  }
}