/* ====================================
   CHAT WIDGET — chat-widget.css
   ====================================
   BEM · Mobile-first
   Utilise les variables CSS du portfolio (style.css)
*/

/* ---- TOGGLE BUTTON ---- */

.chat-widget__toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(92, 224, 198, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-widget__toggle:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(92, 224, 198, 0.4);
}

.chat-widget__toggle--hidden {
  display: none;
}

/* ---- PANEL ---- */

.chat-widget__panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  top: 0;
  background: var(--color-bg);
  z-index: 1001;
  display: none;
  flex-direction: column;
  font-family: var(--font-family);
}

.chat-widget__panel--open {
  display: flex;
}

/* ---- HEADER ---- */

.chat-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 20px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.chat-widget__title {
  margin: 0;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-accent);
}

.chat-widget__close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: color var(--transition-fast);
}

.chat-widget__close:hover {
  color: var(--color-text);
}

/* ---- MESSAGES ---- */

.chat-widget__messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-sm) 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-widget__welcome {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-align: center;
  padding: var(--spacing-md) var(--spacing-sm);
  line-height: var(--line-height-normal);
}

.chat-widget__message {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  word-wrap: break-word;
}

.chat-widget__message--user {
  align-self: flex-end;
  background: var(--color-accent-alpha);
  color: var(--color-accent);
  border-bottom-right-radius: var(--radius-xs);
}

.chat-widget__message--bot {
  align-self: flex-start;
  background: var(--color-card-bg);
  color: var(--color-text);
  border-bottom-left-radius: var(--radius-xs);
}

/* ---- SOURCES ---- */

.chat-widget__sources {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.chat-widget__sources-title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: 4px;
}

.chat-widget__source {
  padding: 2px 0;
}

/* ---- TYPING INDICATOR ---- */

.chat-widget__typing {
  align-self: flex-start;
  padding: 10px 14px;
  margin: 0 20px;
  background: var(--color-card-bg);
  border-radius: var(--radius-md);
  display: none;
}

.chat-widget__typing--visible {
  display: flex;
  align-items: center;
  gap: 4px;
}

.chat-widget__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
  animation: cw-bounce 1.4s infinite;
}

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

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

/* ---- ERROR ---- */

.chat-widget__message--error {
  align-self: flex-start;
  background: rgba(255, 107, 107, 0.1);
  color: #ff6b6b;
  border-bottom-left-radius: var(--radius-xs);
}

/* ---- FORM ---- */

.chat-widget__form {
  display: flex;
  gap: 8px;
  padding: var(--spacing-sm) 20px;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
}

.chat-widget__input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-card-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  outline: none;
  transition: border-color var(--transition-fast);
}

.chat-widget__input::placeholder {
  color: var(--color-text-muted);
}

.chat-widget__input:focus {
  border-color: var(--color-accent);
}

.chat-widget__send {
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-accent);
  color: var(--color-bg);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.chat-widget__send:hover {
  opacity: var(--opacity-hover);
}

.chat-widget__send:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---- DESKTOP ---- */

@media (min-width: 768px) {
  .chat-widget__panel {
    top: auto;
    left: auto;
    bottom: 96px;
    right: 24px;
    width: 400px;
    height: 560px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }
}