/**
 * chatbot.css
 * ─────────────────────────────────────────────────────────────
 * PURPOSE: Styles for "Ask PadmajaAI" floating chatbot widget.
 *          Designed to look like a premium AI chat interface
 *          similar to ChatGPT / Claude sidebar.
 *
 * LOGIC: The chat widget is a floating panel anchored to the
 *        bottom-right corner. It toggles open/closed via JS.
 *        Messages use different styles for user vs. AI.
 *        Suggested prompt chips appear initially.
 *
 * CUSTOMIZATION: Change suggested prompts in index.html.
 *                Connect a real API in chatbot.js.
 * ─────────────────────────────────────────────────────────────
 */

/* ── CHAT TOGGLE BUTTON (FAB) ──────────────────────────────── */
#chat-fab {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 56px; height: 56px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 8px 32px rgba(139, 92, 246, 0.45);
  z-index: calc(var(--z-modal) - 1);
  transition: all var(--transition-spring);
  animation: glow-pulse 3s ease-in-out infinite;
}

#chat-fab:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.6);
}

#chat-fab.open { animation: none; }

/* Notification badge */
#chat-fab .chat-badge {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 16px; height: 16px;
  background: var(--color-success);
  border-radius: 50%;
  border: 2px solid var(--color-bg);
  font-size: 8px;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--weight-bold);
}

/* ── CHAT WINDOW ───────────────────────────────────────────── */
#chat-window {
  position: fixed;
  bottom: calc(var(--space-6) + 56px + var(--space-4));
  right: var(--space-6);
  width: min(380px, calc(100vw - 2 * var(--space-6)));
  height: 560px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  z-index: calc(var(--z-modal) - 1);
  transform: scale(0.9) translateY(20px);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-spring);
  overflow: hidden;
}

#chat-window.open {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: all;
}

/* ── CHAT HEADER ───────────────────────────────────────────── */
.chat__header {
  padding: var(--space-4) var(--space-5);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.chat__header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
}

.chat__avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  border: 2px solid rgba(255,255,255,0.3);
  position: relative;
  z-index: 1;
}

.chat__info {
  flex: 1;
  position: relative;
  z-index: 1;
}

.chat__name {
  font-weight: var(--weight-bold);
  color: white;
  font-size: var(--text-sm);
}

.chat__status {
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255,255,255,0.75);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.chat__status::before {
  content: '';
  width: 5px; height: 5px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

.chat__close {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  z-index: 1;
  border: none;
}

.chat__close:hover { background: rgba(255,255,255,0.3); }

/* ── CHAT MESSAGES AREA ────────────────────────────────────── */
.chat__messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  scroll-behavior: smooth;
}

.chat__messages::-webkit-scrollbar { width: 3px; }
.chat__messages::-webkit-scrollbar-thumb {
  background: rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
}

/* ── SUGGESTED PROMPTS ─────────────────────────────────────── */
.chat__suggestions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.chat__suggestions-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-1);
}

.suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.suggestion-chip {
  font-size: 11px;
  color: var(--color-primary);
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.suggestion-chip:hover {
  background: rgba(139, 92, 246, 0.15);
  transform: translateY(-1px);
}

/* ── MESSAGE BUBBLES ───────────────────────────────────────── */
.chat-message {
  display: flex;
  gap: var(--space-2);
  animation: fadeInUp 0.3s ease both;
}

/* AI message */
.chat-message--ai {
  align-items: flex-start;
}

.chat-message--ai .msg-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  margin-top: 2px;
}

.chat-message--ai .msg-bubble {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px var(--radius-xl) var(--radius-xl) var(--radius-xl);
  padding: var(--space-3) var(--space-4);
  max-width: 85%;
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.6;
}

/* User message */
.chat-message--user {
  align-items: flex-end;
  flex-direction: row-reverse;
}

.chat-message--user .msg-bubble {
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-xl) 4px var(--radius-xl) var(--radius-xl);
  padding: var(--space-3) var(--space-4);
  max-width: 85%;
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* Typing indicator (3 dots) */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px var(--radius-xl) var(--radius-xl) var(--radius-xl);
  width: fit-content;
}

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

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

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
  30%            { transform: translateY(-6px); opacity: 1; }
}

/* ── CHAT INPUT AREA ───────────────────────────────────────── */
.chat__input-area {
  padding: var(--space-3) var(--space-4) var(--space-4);
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.chat__input-wrap {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  transition: border-color var(--transition-fast);
}

.chat__input-wrap:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

#chat-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: var(--text-sm);
  color: var(--color-text);
  resize: none;
  min-height: 24px;
  max-height: 96px;
  line-height: 1.5;
  font-family: var(--font-primary);
}

#chat-input::placeholder { color: var(--color-text-faint); }

#chat-send {
  width: 34px; height: 34px;
  border-radius: var(--radius-lg);
  background: var(--gradient-primary);
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: white;
  font-size: 14px;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

#chat-send:hover { transform: scale(1.05); }
#chat-send:disabled { opacity: 0.5; cursor: not-allowed; }

/* Disclaimer */
.chat__disclaimer {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-text-faint);
  text-align: center;
  margin-top: var(--space-2);
  line-height: 1.5;
}