:root {
  --rio-accent: var(--ifm-color-primary, #25c2a0);
  --rio-accent-dark: var(--ifm-color-primary-dark, #21af90);
  --rio-accent-darker: var(--ifm-color-primary-darker, #1fa588);
  --rio-shadow-tint: rgba(37, 194, 160, 0.35);
  --rio-radius: 16px;
}

.rio-chat-toggle {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 9999;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--rio-accent), var(--rio-accent-dark));
  color: #fff;
  border: none;
  box-shadow: 0 6px 20px var(--rio-shadow-tint), 0 2px 6px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.rio-chat-toggle:hover {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 10px 26px var(--rio-shadow-tint), 0 4px 10px rgba(0, 0, 0, 0.3);
}

.rio-chat-toggle svg {
  width: 26px;
  height: 26px;
}

.rio-chat-toggle .rio-icon-close {
  display: none;
}

.rio-chat-toggle.open .rio-icon-chat {
  display: none;
}

.rio-chat-toggle.open .rio-icon-close {
  display: block;
}

.rio-chat-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #22c55e;
  border: 2px solid var(--ifm-background-color, #1b1b1d);
}

.rio-chat-panel {
  position: fixed;
  bottom: 94px;
  left: 24px;
  z-index: 9999;
  width: 380px;
  max-width: calc(100vw - 32px);
  height: 560px;
  max-height: calc(100vh - 140px);
  background: var(--ifm-background-surface-color, #fff);
  color: var(--ifm-font-color-base, #1c1e21);
  border-radius: var(--rio-radius);
  border: 1px solid var(--ifm-color-emphasis-300, rgba(0, 0, 0, 0.08));
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), 0 4px 14px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--ifm-font-family-base, system-ui, -apple-system, sans-serif);
  opacity: 0;
  transform: translateY(12px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.rio-chat-panel.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.rio-chat-header {
  padding: 14px 16px;
  background: linear-gradient(135deg, var(--rio-accent), var(--rio-accent-darker));
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.rio-chat-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.rio-chat-avatar svg {
  width: 18px;
  height: 18px;
}

.rio-chat-header-text {
  flex: 1;
  min-width: 0;
}

.rio-chat-header-text .rio-title {
  font-weight: 700;
  font-size: 14.5px;
  line-height: 1.2;
}

.rio-chat-header-text .rio-subtitle {
  font-size: 11.5px;
  opacity: 0.85;
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
}

.rio-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

.rio-chat-header button.rio-close {
  background: rgba(255, 255, 255, 0.14);
  border: none;
  color: #fff;
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s ease;
}

.rio-chat-header button.rio-close:hover {
  background: rgba(255, 255, 255, 0.26);
}

.rio-chat-header button.rio-close svg {
  width: 15px;
  height: 15px;
}

.rio-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--ifm-background-color, transparent);
}

.rio-msg-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  max-width: 92%;
}

.rio-msg-row.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.rio-msg-row.bot {
  align-self: flex-start;
}

.rio-msg-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--rio-accent), var(--rio-accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.rio-msg-avatar svg {
  width: 13px;
  height: 13px;
  color: #fff;
}

.rio-chat-msg {
  padding: 9px 13px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.rio-msg-row.user .rio-chat-msg {
  background: linear-gradient(135deg, var(--rio-accent), var(--rio-accent-dark));
  color: #fff;
  border-bottom-right-radius: 4px;
}

.rio-msg-row.bot .rio-chat-msg {
  background: var(--ifm-color-emphasis-200, #f1f1f3);
  color: var(--ifm-font-color-base, #1c1e21);
  border-bottom-left-radius: 4px;
}

.rio-chat-msg .rio-sources {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--ifm-color-emphasis-300, rgba(0, 0, 0, 0.1));
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.rio-chat-msg .rio-sources a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--rio-accent-darker, var(--rio-accent));
  background: rgba(37, 194, 160, 0.12);
  border-radius: 999px;
  padding: 3px 9px 3px 8px;
  font-size: 11.5px;
  font-weight: 600;
  text-decoration: none;
  line-height: 1.4;
  transition: background 0.15s ease;
}

.rio-chat-msg .rio-sources a:hover {
  background: rgba(37, 194, 160, 0.22);
  text-decoration: none;
}

.rio-chat-msg .rio-sources a svg {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
}

.rio-suggestions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
  align-self: flex-start;
  max-width: 92%;
}

.rio-suggestions button {
  text-align: left;
  background: var(--ifm-background-surface-color, #fff);
  border: 1px solid var(--ifm-color-emphasis-300, rgba(0, 0, 0, 0.12));
  color: var(--ifm-font-color-base, #1c1e21);
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.rio-suggestions button:hover {
  border-color: var(--rio-accent);
  background: rgba(37, 194, 160, 0.08);
}

.rio-chat-input {
  display: flex;
  align-items: flex-end;
  border-top: 1px solid var(--ifm-color-emphasis-300, rgba(0, 0, 0, 0.1));
  padding: 10px;
  gap: 8px;
  flex-shrink: 0;
  background: var(--ifm-background-surface-color, #fff);
}

.rio-chat-input textarea {
  flex: 1;
  resize: none;
  border: 1px solid var(--ifm-color-emphasis-300, rgba(0, 0, 0, 0.15));
  background: var(--ifm-background-color, transparent);
  color: var(--ifm-font-color-base, #1c1e21);
  border-radius: 18px;
  padding: 9px 14px;
  font-size: 14px;
  font-family: inherit;
  max-height: 90px;
  line-height: 1.4;
  transition: border-color 0.15s ease;
}

.rio-chat-input textarea:focus {
  outline: none;
  border-color: var(--rio-accent);
}

.rio-chat-input button.rio-send {
  background: linear-gradient(135deg, var(--rio-accent), var(--rio-accent-dark));
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.rio-chat-input button.rio-send svg {
  width: 16px;
  height: 16px;
}

.rio-chat-input button.rio-send:hover:not(:disabled) {
  transform: scale(1.06);
}

.rio-chat-input button.rio-send:disabled {
  opacity: 0.4;
  cursor: default;
}

.rio-chat-typing {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 13px;
  background: var(--ifm-color-emphasis-200, #f1f1f3);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
}

.rio-chat-typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ifm-color-emphasis-500, #999);
  animation: rio-bounce 1.2s infinite ease-in-out;
}

.rio-chat-typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.rio-chat-typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes rio-bounce {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  30% {
    transform: translateY(-4px);
    opacity: 1;
  }
}

@media (max-width: 480px) {
  .rio-chat-panel {
    left: 12px;
    right: 12px;
    width: auto;
    max-width: none;
    bottom: 88px;
    height: calc(100vh - 160px);
  }

  .rio-chat-toggle {
    left: 16px;
    bottom: 16px;
  }
}