/* §docs-ask-ai: floating AI chat widget for docs.onplana.com.
   Uses Starlight CSS custom properties for theme-aware colours so the
   widget matches the site in both light and dark mode. */

/* ── Floating button ──────────────────────────────────────────────────────── */

#onplana-chat-btn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;

  display: inline-flex;
  align-items: center;
  gap: 0.5rem;

  padding: 0.625rem 1rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;

  background: var(--sl-color-accent);
  color: #fff;
  font-family: var(--sl-font, inherit);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;

  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

#onplana-chat-btn:hover {
  background: var(--sl-color-accent-high, var(--sl-color-accent));
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.22);
  transform: translateY(-1px);
}

#onplana-chat-btn:focus-visible {
  outline: 2px solid var(--sl-color-accent);
  outline-offset: 3px;
}

#onplana-chat-btn svg {
  flex-shrink: 0;
}

/* ── Chat panel ───────────────────────────────────────────────────────────── */

#onplana-chat-panel {
  position: fixed;
  bottom: 5.25rem;
  right: 1.5rem;
  z-index: 9998;

  width: 360px;
  max-height: 500px;
  display: flex;
  flex-direction: column;

  background: var(--sl-color-bg);
  border: 1px solid var(--sl-color-gray-5);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
  overflow: hidden;

  transform-origin: bottom right;
  animation: chat-panel-in 0.2s ease;
}

#onplana-chat-panel[hidden] {
  display: none;
}

@keyframes chat-panel-in {
  from { opacity: 0; transform: scale(0.95) translateY(8px); }
  to   { opacity: 1; transform: scale(1)    translateY(0);   }
}

/* ── Panel header ─────────────────────────────────────────────────────────── */

.oc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1rem;
  background: var(--sl-color-accent);
  color: #fff;
  flex-shrink: 0;
}

.oc-header-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.oc-close-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.85);
  padding: 0.2rem;
  border-radius: 4px;
  display: flex;
  align-items: center;
  transition: color 0.12s, background 0.12s;
}

.oc-close-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
}

.oc-close-btn:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.7);
  outline-offset: 2px;
}

/* ── Messages area ────────────────────────────────────────────────────────── */

.oc-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overscroll-behavior: contain;
}

/* ── Message bubbles ──────────────────────────────────────────────────────── */

.oc-msg {
  display: flex;
  flex-direction: column;
  max-width: 88%;
}

.oc-msg--user {
  align-self: flex-end;
  align-items: flex-end;
}

.oc-msg--ai {
  align-self: flex-start;
  align-items: flex-start;
}

.oc-bubble {
  padding: 0.625rem 0.875rem;
  border-radius: 12px;
  font-size: 0.875rem;
  line-height: 1.55;
  word-break: break-word;
}

.oc-msg--user .oc-bubble {
  background: var(--sl-color-accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.oc-msg--ai .oc-bubble {
  background: var(--sl-color-gray-6, var(--sl-color-bg-nav));
  color: var(--sl-color-text);
  border-bottom-left-radius: 4px;
  border: 1px solid var(--sl-color-gray-5);
}

/* ── Typing indicator ─────────────────────────────────────────────────────── */

.oc-typing {
  display: inline-flex;
  gap: 4px;
  padding: 0.625rem 0.875rem;
  background: var(--sl-color-gray-6, var(--sl-color-bg-nav));
  border: 1px solid var(--sl-color-gray-5);
  border-radius: 12px;
  border-bottom-left-radius: 4px;
}

.oc-typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sl-color-gray-3);
  animation: oc-dot-bounce 1.2s ease-in-out infinite;
}

.oc-typing span:nth-child(2) { animation-delay: 0.2s; }
.oc-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes oc-dot-bounce {
  0%, 80%, 100% { transform: translateY(0);    opacity: 0.4; }
  40%           { transform: translateY(-5px); opacity: 1;   }
}

/* ── Sources list ─────────────────────────────────────────────────────────── */

.oc-sources {
  margin-top: 0.375rem;
  font-size: 0.75rem;
  color: var(--sl-color-gray-3);
}

.oc-sources a {
  color: var(--sl-color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.oc-sources a:hover {
  color: var(--sl-color-accent-high, var(--sl-color-accent));
}

/* ── Input row ────────────────────────────────────────────────────────────── */

.oc-input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--sl-color-gray-5);
  background: var(--sl-color-bg);
  flex-shrink: 0;
}

.oc-input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--sl-color-gray-5);
  background: var(--sl-color-bg-nav, var(--sl-color-bg));
  color: var(--sl-color-text);
  font-size: 0.875rem;
  font-family: var(--sl-font, inherit);
  outline: none;
  transition: border-color 0.15s;
}

.oc-input::placeholder {
  color: var(--sl-color-gray-3);
}

.oc-input:focus {
  border-color: var(--sl-color-accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--sl-color-accent) 20%, transparent);
}

.oc-input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.oc-send-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  background: var(--sl-color-accent);
  color: #fff;
  transition: background 0.15s, opacity 0.15s;
}

.oc-send-btn:hover:not(:disabled) {
  background: var(--sl-color-accent-high, var(--sl-color-accent));
}

.oc-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.oc-send-btn:focus-visible {
  outline: 2px solid var(--sl-color-accent);
  outline-offset: 2px;
}

/* ── Error state ──────────────────────────────────────────────────────────── */

.oc-msg--error .oc-bubble {
  background: color-mix(in srgb, #ef4444 12%, transparent);
  border-color: #ef4444;
  color: #b91c1c;
}

[data-theme="dark"] .oc-msg--error .oc-bubble {
  background: color-mix(in srgb, #ef4444 15%, transparent);
  color: #fca5a5;
}

/* ── Mobile ───────────────────────────────────────────────────────────────── */

@media (max-width: 480px) {
  #onplana-chat-panel {
    right: 0.75rem;
    left: 0.75rem;
    width: auto;
    bottom: 4.75rem;
  }

  #onplana-chat-btn {
    right: 0.75rem;
    bottom: 1rem;
  }
}