/*
  Floating AI assistant (js/ai-chat.js). Self-contained: its own colours so it
  looks the same on the Webflow pages and in the docs-style Study Portal.
*/

.rdai {
  --ai-bg: #0b0f16;
  --ai-bg-2: #131a24;
  --ai-bg-3: #1b2431;
  --ai-border: #263140;
  --ai-text: #e8ecf2;
  --ai-muted: #8b97a8;
  --ai-accent: #3b82f6;
  --ai-accent-2: #2563eb;
  --ai-danger: #f87171;
  --ai-warn: #f2b441;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ai-text);
}

.rdai *,
.rdai *::before,
.rdai *::after {
  box-sizing: border-box;
}

/* ---------- Floating button ---------- */

.rdai-fab {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 9990;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 54px;
  padding: 0 20px 0 16px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--ai-accent), var(--ai-accent-2));
  color: #fff;
  font: 600 15px/1 inherit;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
}

.rdai-fab:hover {
  filter: brightness(1.08);
}

.rdai-fab svg {
  width: 22px;
  height: 22px;
}

.rdai-fab[aria-expanded='true'] {
  display: none;
}

/* The Study Portal already has a back-to-top button in this corner. */
body.docs-body .rdai-fab {
  bottom: 92px;
}

/* ---------- Panel ---------- */

.rdai-panel {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 9991;
  display: flex;
  flex-direction: column;
  width: min(400px, calc(100vw - 24px));
  height: min(640px, calc(100vh - 40px));
  background: var(--ai-bg);
  border: 1px solid var(--ai-border);
  border-radius: 16px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}

.rdai-panel[hidden] {
  display: none;
}

.rdai-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 12px 10px 16px;
  background: var(--ai-bg-2);
  border-bottom: 1px solid var(--ai-border);
}

.rdai-title {
  flex: 1;
  margin: 0;
  font-size: 16px;
  font-weight: 650;
}

.rdai-title small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--ai-muted);
}

.rdai-icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--ai-muted);
  cursor: pointer;
}

.rdai-icon-btn:hover {
  background: var(--ai-bg-3);
  color: var(--ai-text);
}

.rdai-icon-btn svg {
  width: 20px;
  height: 20px;
}

.rdai-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 10px 12px;
  background: var(--ai-bg);
  border-bottom: 1px solid var(--ai-border);
}

.rdai-tab {
  padding: 8px 10px;
  border: 1px solid var(--ai-border);
  border-radius: 9px;
  background: var(--ai-bg-2);
  color: var(--ai-muted);
  font: 600 13.5px/1.2 inherit;
  cursor: pointer;
}

.rdai-tab[aria-selected='true'] {
  background: rgba(59, 130, 246, 0.16);
  border-color: var(--ai-accent);
  color: #a9c8ff;
}

/* ---------- Messages ---------- */

.rdai-log {
  flex: 1;
  overflow-y: auto;
  padding: 14px 14px 6px;
  scrollbar-width: thin;
}

.rdai-msg {
  display: flex;
  margin: 0 0 12px;
}

.rdai-msg.is-user {
  justify-content: flex-end;
}

.rdai-bubble {
  max-width: 90%;
  padding: 10px 13px;
  border-radius: 14px;
  background: var(--ai-bg-3);
  overflow-wrap: anywhere;
}

.rdai-msg.is-user .rdai-bubble {
  background: var(--ai-accent-2);
  color: #fff;
  border-bottom-right-radius: 4px;
  white-space: pre-wrap;
}

.rdai-msg.is-bot .rdai-bubble {
  border-bottom-left-radius: 4px;
}

.rdai-bubble p {
  margin: 0 0 8px;
}

.rdai-bubble p:last-child,
.rdai-bubble ul:last-child,
.rdai-bubble ol:last-child,
.rdai-bubble pre:last-child {
  margin-bottom: 0;
}

.rdai-bubble ul,
.rdai-bubble ol {
  margin: 0 0 8px;
  padding-left: 20px;
}

.rdai-bubble a {
  color: #8fb8ff;
}

.rdai-bubble code {
  font-family: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.88em;
  padding: 1px 5px;
  border-radius: 5px;
  background: rgba(0, 0, 0, 0.35);
}

.rdai-bubble pre {
  margin: 0 0 8px;
  padding: 10px 12px;
  overflow-x: auto;
  border-radius: 9px;
  background: #070a0f;
  border: 1px solid var(--ai-border);
}

.rdai-bubble pre code {
  padding: 0;
  background: none;
  font-size: 12.5px;
  white-space: pre;
}

.rdai-note {
  margin: 0 0 12px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--ai-border);
  background: var(--ai-bg-2);
  color: var(--ai-muted);
  font-size: 13.5px;
}

.rdai-note.is-error {
  border-color: rgba(248, 113, 113, 0.5);
  color: #fca5a5;
}

.rdai-typing {
  display: inline-flex;
  gap: 4px;
  padding: 4px 2px;
}

.rdai-typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ai-muted);
  animation: rdai-bounce 1s infinite ease-in-out;
}

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

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

@keyframes rdai-bounce {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: translateY(0);
  }

  40% {
    opacity: 1;
    transform: translateY(-4px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .rdai-typing span {
    animation: none;
    opacity: 0.7;
  }
}

.rdai-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 12px;
}

.rdai-chip {
  padding: 7px 12px;
  border: 1px solid var(--ai-border);
  border-radius: 999px;
  background: var(--ai-bg-2);
  color: var(--ai-text);
  font: 500 13px/1.2 inherit;
  cursor: pointer;
  text-align: left;
}

.rdai-chip:hover {
  border-color: var(--ai-accent);
}

/* ---------- Footer: counter + composer ---------- */

.rdai-foot {
  padding: 8px 12px 12px;
  border-top: 1px solid var(--ai-border);
  background: var(--ai-bg);
}

.rdai-meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--ai-muted);
}

.rdai-meta .is-low {
  color: var(--ai-warn);
}

.rdai-meta .is-over {
  color: var(--ai-danger);
}

.rdai-lock {
  margin: 0 0 8px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(242, 180, 65, 0.12);
  border: 1px solid rgba(242, 180, 65, 0.4);
  color: #f5cd7d;
  font-size: 13.5px;
}

.rdai-lock[hidden] {
  display: none;
}

.rdai-form {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.rdai-input {
  flex: 1;
  min-height: 42px;
  max-height: 130px;
  padding: 10px 12px;
  resize: none;
  border: 1px solid var(--ai-border);
  border-radius: 12px;
  background: var(--ai-bg-2);
  color: var(--ai-text);
  font: inherit;
}

.rdai-input::placeholder {
  color: var(--ai-muted);
}

.rdai-input:focus {
  outline: none;
  border-color: var(--ai-accent);
}

.rdai-input:disabled {
  opacity: 0.55;
}

.rdai-send {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border: 0;
  border-radius: 12px;
  background: var(--ai-accent-2);
  color: #fff;
  cursor: pointer;
}

.rdai-send:disabled {
  background: var(--ai-bg-3);
  color: var(--ai-muted);
  cursor: not-allowed;
}

.rdai-send svg {
  width: 20px;
  height: 20px;
}

.rdai-fine {
  margin: 6px 2px 0;
  font-size: 11.5px;
  color: var(--ai-muted);
}

.rdai :focus-visible {
  outline: 2px solid var(--ai-accent);
  outline-offset: 2px;
}

@media (max-width: 520px) {
  .rdai-panel {
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 88vh;
    border-radius: 16px 16px 0 0;
  }

  .rdai-fab {
    right: 14px;
    bottom: 14px;
  }

  body.docs-body .rdai-fab {
    bottom: 80px;
  }
}