:root {
  --don-ai-primary: #111111;
  --don-ai-secondary: #1f2937;
  --don-ai-surface: rgba(255, 255, 255, 0.96);
  --don-ai-border: rgba(15, 23, 42, 0.10);
  --don-ai-text: #0f172a;
  --don-ai-muted: #64748b;
}

#don-ai-toggle,
#don-ai-greeting,
#don-ai-chatbot,
#don-ai-chatbot * {
  box-sizing: border-box;
}

#don-ai-toggle {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 62px;
  height: 62px;
  border-radius: 22px;
  background:
    radial-gradient(circle at 35% 20%, rgba(255,255,255,.28), transparent 32%),
    linear-gradient(135deg, var(--don-ai-primary), var(--don-ai-secondary));
  color: #ffffff;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 18px 48px rgba(15, 23, 42, .32), inset 0 1px 0 rgba(255,255,255,.24);
  z-index: 999999;
  transition: transform .22s ease, box-shadow .22s ease, filter .22s ease;
  border: 1px solid rgba(255,255,255,.22);
  backdrop-filter: blur(12px);
}

#don-ai-toggle:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 22px 58px rgba(15, 23, 42, .38), inset 0 1px 0 rgba(255,255,255,.25);
  filter: saturate(1.08);
}

#don-ai-greeting {
  position: fixed;
  right: 22px;
  bottom: 96px;
  width: 318px;
  background: var(--don-ai-surface);
  padding: 15px 44px 15px 17px;
  border-radius: 22px;
  box-shadow: 0 20px 55px rgba(15, 23, 42, .20), inset 0 1px 0 rgba(255,255,255,.85);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 13.5px;
  line-height: 1.46;
  z-index: 999997;
  cursor: pointer;
  animation: donAiFloatIn .35s cubic-bezier(.2,.8,.2,1);
  color: var(--don-ai-text);
  border: 1px solid var(--don-ai-border);
  backdrop-filter: blur(14px);
}

#don-ai-greeting-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(15, 23, 42, .08);
  border-radius: 50%;
  background: rgba(248, 250, 252, .92);
  color: #475569;
  font-size: 13px;
  line-height: 24px;
  text-align: center;
  cursor: pointer;
  padding: 0;
  transition: all .18s ease;
}

#don-ai-greeting-close:hover {
  background: #0f172a;
  border-color: #0f172a;
  color: #ffffff;
  transform: rotate(90deg);
}

.don-ai-greeting-title {
  display: block;
  font-size: 14.5px;
  font-weight: 750;
  letter-spacing: -.01em;
  color: var(--don-ai-text);
  margin-bottom: 6px;
}

.don-ai-greeting-message {
  color: #334155;
}

#don-ai-greeting strong,
.don-ai-greeting-message strong {
  color: var(--don-ai-primary);
  font-weight: 800;
}

@keyframes donAiFloatIn {
  from { opacity: 0; transform: translateY(12px) scale(.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

#don-ai-chatbot {
  position: fixed;
  right: 22px;
  bottom: 96px;
  width: 372px;
  height: 560px;
  background: rgba(255,255,255,.96);
  border-radius: 28px;
  box-shadow: 0 28px 80px rgba(15, 23, 42, .34), inset 0 1px 0 rgba(255,255,255,.8);
  overflow: hidden;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  z-index: 999998;
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease;
  transform-origin: bottom right;
  border: 1px solid rgba(15, 23, 42, .10);
  backdrop-filter: blur(18px);
}

#don-ai-chatbot.closed {
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(.94);
  pointer-events: none;
  display: none !important;
}

#don-ai-chatbot.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  display: flex !important;
  flex-direction: column;
}

#don-ai-header {
  min-height: 70px;
  background:
    radial-gradient(circle at 10% 0%, rgba(255,255,255,.22), transparent 35%),
    linear-gradient(135deg, var(--don-ai-primary), var(--don-ai-secondary));
  color: #ffffff;
  padding: 16px 16px 14px 18px;
  font-size: 15px;
  font-weight: 760;
  letter-spacing: -.01em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  box-shadow: inset 0 -1px 0 rgba(255,255,255,.12);
}

#don-ai-header::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34,197,94,.15);
  flex: 0 0 auto;
}

#don-ai-header > span {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#don-ai-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

#don-ai-end {
  background: rgba(255,255,255,.14);
  color: #ffffff;
  border: 1px solid rgba(255,255,255,.20);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all .18s ease;
}

#don-ai-end:hover {
  background: rgba(255,255,255,.24);
}

#don-ai-close {
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: rgba(255,255,255,.9);
  background: rgba(255,255,255,.12);
  transition: all .18s ease;
}

#don-ai-close:hover {
  background: rgba(255,255,255,.24);
  transform: rotate(90deg);
}

#don-ai-messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 18px 16px;
  background:
    radial-gradient(circle at 50% 0%, rgba(15, 23, 42, .045), transparent 36%),
    #f8fafc;
  font-size: 13.5px;
  scrollbar-width: thin;
  scrollbar-color: rgba(15,23,42,.24) transparent;
}

#don-ai-messages::-webkit-scrollbar { width: 7px; }
#don-ai-messages::-webkit-scrollbar-thumb { background: rgba(15,23,42,.20); border-radius: 999px; }

.don-user-msg,
.don-ai-msg {
  max-width: 84%;
  padding: 10px 13px;
  margin-bottom: 11px;
  border-radius: 18px;
  line-height: 1.48;
  word-wrap: break-word;
  font-size: 13.5px;
}

.don-user-msg {
  margin-left: auto;
  background: linear-gradient(135deg, var(--don-ai-primary), var(--don-ai-secondary));
  color: #ffffff;
  border-bottom-right-radius: 7px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, .18);
}

.don-ai-msg {
  margin-right: auto;
  background: rgba(255,255,255,.96);
  color: #172033;
  border: 1px solid rgba(15, 23, 42, .08);
  border-bottom-left-radius: 7px;
  box-shadow: 0 10px 24px rgba(15,23,42,.06);
}

.don-ai-msg a {
  color: var(--don-ai-primary) !important;
  font-weight: 750;
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-word;
}

#don-ai-input-area {
  height: 76px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px;
  background: rgba(255,255,255,.97);
  border-top: 1px solid rgba(15, 23, 42, .08);
}

#don-ai-input {
  flex: 1;
  height: 44px;
  min-width: 0;
  border: 1px solid rgba(15, 23, 42, .10);
  border-radius: 999px;
  padding: 0 15px;
  font-size: 13.5px;
  outline: none;
  background: #f8fafc;
  color: #0f172a;
  transition: all .18s ease;
  box-shadow: inset 0 1px 2px rgba(15,23,42,.04);
}

#don-ai-input:focus {
  background: #ffffff;
  border-color: color-mix(in srgb, var(--don-ai-primary) 55%, #ffffff);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--don-ai-primary) 12%, transparent);
}

#don-ai-send {
  height: 44px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--don-ai-primary), var(--don-ai-secondary));
  color: #ffffff;
  padding: 0 17px;
  font-size: 13px;
  font-weight: 760;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
  box-shadow: 0 10px 24px rgba(15,23,42,.18);
}

#don-ai-send:hover {
  transform: translateY(-1px);
  filter: saturate(1.08);
  box-shadow: 0 13px 28px rgba(15,23,42,.22);
}

@media (max-width: 480px) {
  #don-ai-toggle {
    right: 16px;
    bottom: 16px;
    width: 58px;
    height: 58px;
    border-radius: 20px;
    font-size: 26px;
  }

  #don-ai-greeting {
    right: 14px;
    bottom: 86px;
    width: calc(100% - 28px);
    max-width: 340px;
  }

  #don-ai-chatbot {
    right: 10px;
    bottom: 84px;
    width: calc(100% - 20px);
    height: min(560px, calc(100vh - 104px));
    border-radius: 24px;
  }

  #don-ai-header {
    min-height: 64px;
    padding: 14px;
  }

  #don-ai-messages {
    padding: 15px 13px;
  }

  #don-ai-input-area {
    height: 72px;
    padding: 11px;
  }
}