:root {
  --yn-primary: #1c2b4a;
  --yn-primary-dark: #12203a;
  --yn-bg: #fffdf8;
  --yn-bubble-user: #1c2b4a;
  --yn-bubble-bot: #f4efe1;
  --yn-text-dark: #1c2b4a;
  --yn-text-light: #ffffff;
  --yn-radius: 6px;
  --yn-accent: #e8a33d;
}

#yn-launcher {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  background: var(--yn-primary);
  color: var(--yn-text-light);
  border: none;
  border-radius: 999px;
  padding: 14px 20px;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}
#yn-launcher:hover {
  background: var(--yn-primary-dark);
}

#yn-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  width: 360px;
  max-width: calc(100vw - 32px);
  height: 520px;
  max-height: calc(100vh - 48px);
  background: var(--yn-bg);
  border-radius: var(--yn-radius);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
  display: none;
  flex-direction: column;
  overflow: hidden;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
#yn-widget.yn-open {
  display: flex;
}

#yn-header {
  background: var(--yn-primary);
  color: var(--yn-text-light);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#yn-header-title {
  font-weight: 700;
  font-size: 15px;
}
#yn-header-subtitle {
  font-size: 12px;
  opacity: 0.85;
}
#yn-close {
  background: none;
  border: none;
  color: var(--yn-text-light);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
}

#yn-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fafafa;
}

.yn-msg {
  max-width: 80%;
  padding: 10px 13px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.4;
  white-space: pre-wrap;
}
.yn-msg-user {
  align-self: flex-end;
  background: var(--yn-bubble-user);
  color: var(--yn-text-light);
  border-bottom-right-radius: 3px;
}
.yn-msg-bot {
  align-self: flex-start;
  background: var(--yn-bubble-bot);
  color: var(--yn-text-dark);
  border-bottom-left-radius: 3px;
}
.yn-msg-typing {
  align-self: flex-start;
  background: var(--yn-bubble-bot);
  color: #888;
  font-style: italic;
}

#yn-input-row {
  display: flex;
  border-top: 1px solid #e5e5e5;
  padding: 10px;
  gap: 8px;
  background: var(--yn-bg);
}
#yn-input {
  flex: 1;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  resize: none;
  font-family: inherit;
}
#yn-send {
  background: var(--yn-accent);
  color: var(--yn-primary);
  border: none;
  border-radius: 8px;
  padding: 0 16px;
  font-weight: 700;
  cursor: pointer;
}
#yn-send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}