:root {
  --ai-panel-border: rgba(31, 52, 84, 0.2);
  --ai-panel-shadow: 0 26px 52px rgba(10, 20, 38, 0.2);
  --ai-text: #1a2d49;
  --ai-muted: #4d5f79;
  --ai-cyan: #1f9be8;
  --ai-blue: #2263d8;
  --ai-steel-1: #c3cbd7;
  --ai-steel-2: #aeb8c7;
  --ai-steel-3: #8f9db2;
}

.auth-state-panel {
  margin-top: 16px;
}

.auth-gate {
  margin-top: 12px;
}

.hidden {
  display: none;
}

#ai-ready {
  grid-template-columns: 1fr;
}

.status-block {
  margin: 0;
  min-height: 74px;
  border-radius: 12px;
  border: 1px solid rgba(24, 36, 63, 0.16);
  background: rgba(255, 255, 255, 0.9);
  padding: 10px;
  color: #223956;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.82rem;
}

.gate-actions {
  margin-top: 12px;
}

.muted-line {
  margin-top: 10px;
  color: #596a80;
  font-size: 0.92rem;
}

.ai-console-panel {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid var(--ai-panel-border);
  background: linear-gradient(165deg, rgba(247, 250, 255, 0.96), rgba(233, 241, 252, 0.9));
  box-shadow: var(--ai-panel-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.8);
  padding: 18px;
}

.ai-console-panel::before {
  content: "";
  position: absolute;
  inset: -25% -10% auto;
  height: 240px;
  background: radial-gradient(circle at 30% 30%, rgba(31, 155, 232, 0.28), transparent 56%),
    radial-gradient(circle at 70% 20%, rgba(34, 99, 216, 0.23), transparent 52%);
  pointer-events: none;
}

.ai-console-panel > * {
  position: relative;
  z-index: 1;
}

.ai-console-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 14px;
  margin-bottom: 10px;
}

.ai-console-head h2 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  color: var(--ai-text);
}

.status-tip {
  margin: 0;
  color: var(--ai-muted);
  line-height: 1.55;
  font-size: 0.88rem;
}

.status-tip code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.78rem;
  color: #264a78;
}

.session-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.session-toolbar .btn {
  border-radius: 999px;
  padding: 7px 12px;
  border: 1px solid rgba(21, 41, 72, 0.16);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.95), rgba(233, 239, 248, 0.95));
  box-shadow: 0 4px 8px rgba(20, 35, 60, 0.1);
}

.conversation-list {
  max-height: 160px;
  overflow: auto;
  border: 1px solid rgba(24, 44, 76, 0.14);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(247, 250, 255, 0.95), rgba(235, 241, 250, 0.95));
  padding: 8px;
  margin-bottom: 12px;
}

.conversation-item {
  width: 100%;
  text-align: left;
  border: 1px solid rgba(24, 44, 76, 0.14);
  background: rgba(255, 255, 255, 0.9);
  border-radius: 12px;
  padding: 9px;
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.conversation-item + .conversation-item {
  margin-top: 8px;
}

.conversation-item:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 113, 221, 0.5);
  box-shadow: 0 8px 14px rgba(31, 113, 221, 0.16);
}

.conversation-item.active {
  border-color: rgba(31, 113, 221, 0.6);
  background: linear-gradient(170deg, rgba(229, 239, 255, 0.95), rgba(214, 231, 255, 0.88));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72), 0 8px 16px rgba(31, 113, 221, 0.16);
}

.conversation-title {
  margin: 0;
  color: #27446c;
  font-size: 0.86rem;
  font-weight: 700;
}

.conversation-meta {
  margin-top: 6px;
  color: #526884;
  font-size: 0.78rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.chat-frame {
  position: relative;
  border-radius: 28px;
  padding: 14px;
  background: linear-gradient(170deg, var(--ai-steel-1), var(--ai-steel-2) 45%, var(--ai-steel-3));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.56), inset 0 -30px 48px rgba(14, 29, 50, 0.2),
    0 16px 30px rgba(15, 28, 48, 0.2);
}

.chat-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image: radial-gradient(rgba(255, 255, 255, 0.26) 1.2px, transparent 1.2px);
  background-size: 16px 16px;
  opacity: 0.42;
  pointer-events: none;
}

.preview-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 18px;
  min-height: 330px;
  max-height: 56vh;
  overflow: auto;
  padding: 4px;
}

.preview-card {
  width: min(72%, 640px);
  border: 1px solid rgba(20, 37, 64, 0.2);
  border-radius: 18px;
  padding: 14px 16px;
  backdrop-filter: blur(4px);
  box-shadow: 0 12px 20px rgba(16, 30, 52, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.62);
  animation: chat-rise 240ms ease;
}

.preview-card h4 {
  margin: 0;
  font-size: 0.88rem;
  color: #1f365a;
}

.preview-card p {
  margin: 8px 0 0;
  color: #223851;
  white-space: pre-wrap;
  word-break: break-word;
}

.preview-card .status-tip {
  margin-top: 10px;
  color: rgba(27, 44, 66, 0.75);
  font-size: 0.76rem;
}

.preview-card.user {
  justify-self: end;
  background: linear-gradient(155deg, rgba(198, 227, 255, 0.95), rgba(146, 197, 255, 0.9));
  border-color: rgba(31, 113, 221, 0.35);
}

.preview-card.assistant {
  justify-self: start;
  background: linear-gradient(155deg, rgba(246, 251, 255, 0.95), rgba(222, 236, 250, 0.92));
  border-color: rgba(64, 114, 184, 0.28);
}

.preview-card.error {
  justify-self: center;
  width: min(86%, 720px);
  background: linear-gradient(155deg, rgba(255, 238, 238, 0.96), rgba(255, 211, 211, 0.92));
  border-color: rgba(202, 68, 68, 0.35);
}

.ai-input-bar {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 10px;
  border-radius: 28px;
  padding: 10px;
  border: 1px solid rgba(23, 40, 66, 0.22);
  background: linear-gradient(166deg, rgba(198, 208, 222, 0.95), rgba(170, 182, 199, 0.95));
  box-shadow: inset 0 2px 6px rgba(255, 255, 255, 0.44), inset 0 -14px 20px rgba(55, 71, 95, 0.2),
    0 10px 20px rgba(12, 25, 44, 0.16);
}

.ai-input-bar textarea {
  width: 100%;
  border: 0;
  background: transparent;
  color: #101f36;
  min-height: 56px;
  max-height: 168px;
  padding: 10px 12px;
  line-height: 1.45;
  font-size: 1.03rem;
  font-family: "Space Grotesk", "PingFang SC", "Noto Sans SC", sans-serif;
  resize: none;
  outline: none;
}

.ai-input-bar textarea::placeholder {
  color: rgba(24, 42, 66, 0.68);
}

#ai-send-btn {
  border-radius: 22px;
  min-width: 108px;
  min-height: 50px;
  justify-content: center;
  letter-spacing: 0.04em;
  border: 1px solid rgba(34, 99, 216, 0.28);
  background: linear-gradient(140deg, var(--ai-cyan), var(--ai-blue));
  box-shadow: 0 10px 18px rgba(22, 81, 173, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

#ai-send-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 20px rgba(22, 81, 173, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.32);
}

#ai-send-btn:disabled,
.ai-input-bar textarea:disabled {
  opacity: 0.62;
  cursor: not-allowed;
}

.ai-metrics {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

#ai-hint {
  margin-top: 10px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@keyframes chat-rise {
  from {
    transform: translateY(6px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 960px) {
  .preview-card {
    width: min(84%, 640px);
  }

  .preview-list {
    max-height: 50vh;
  }
}

@media (max-width: 760px) {
  .ai-console-panel {
    padding: 14px;
  }

  .chat-frame {
    border-radius: 22px;
    padding: 10px;
  }

  .preview-list {
    min-height: 280px;
    gap: 14px;
  }

  .preview-card,
  .preview-card.error {
    width: 100%;
  }

  .ai-input-bar {
    grid-template-columns: 1fr;
    border-radius: 20px;
  }

  #ai-send-btn {
    width: 100%;
  }

  .ai-metrics {
    grid-template-columns: 1fr;
  }
}