:root {
  --vkp-cyan: #00f2ff;
  --vkp-purple: #a855f7;
  --vkp-pink: #ec4899;
  --vkp-bg: #0b0b14;
  --vkp-panel: rgba(14, 14, 24, 0.92);
  --vkp-bubble-bot: rgba(168, 85, 247, 0.12);
  --vkp-bubble-user: rgba(0, 242, 255, 0.14);
  --vkp-border: rgba(0, 242, 255, 0.35);
  --vkp-text: #e8e8f5;
  --vkp-text-dim: #9a9ab0;
  --vkp-radius: 18px;
}

#vkp-chatbot-root, #vkp-chatbot-root * {
  box-sizing: border-box;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

/* ---------- Floating toggle button ---------- */
#vkp-chat-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  z-index: 9998;
  background: linear-gradient(135deg, var(--vkp-cyan), var(--vkp-purple), var(--vkp-pink));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #05050a;
  box-shadow: 0 0 20px rgba(0, 242, 255, 0.45), 0 0 40px rgba(168, 85, 247, 0.25);
  transition: transform 0.25s ease;
}
#vkp-chat-toggle:hover { transform: scale(1.08); }
#vkp-chat-toggle .vkp-toggle-pulse {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid var(--vkp-cyan);
  opacity: 0.6;
  animation: vkp-pulse 2.2s ease-out infinite;
}
@keyframes vkp-pulse {
  0% { transform: scale(0.9); opacity: 0.7; }
  100% { transform: scale(1.5); opacity: 0; }
}

/* ---------- Chat window ---------- */
#vkp-chat-window {
  position: fixed;
  bottom: 96px;
  right: 24px;
  width: 380px;
  height: 520px;
  max-height: 75vh;
  background: var(--vkp-panel);
  border: 1px solid var(--vkp-border);
  border-radius: var(--vkp-radius);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 0 30px rgba(0, 242, 255, 0.15), 0 8px 40px rgba(0,0,0,0.5);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width 0.3s ease, height 0.3s ease, max-height 0.3s ease, border-radius 0.3s ease,
              top 0.3s ease, left 0.3s ease, right 0.3s ease, bottom 0.3s ease;
}
#vkp-chat-window.vkp-hidden { display: none; }

/* Auto-expand state, applied by JS when a long / code-containing reply arrives */
#vkp-chat-window.vkp-expanded {
  width: 480px;
  height: 640px;
  max-height: 85vh;
}

/* Fullscreen state, toggled by the expand button */
#vkp-chat-window.vkp-fullscreen {
  top: 16px;
  left: 16px;
  right: 16px;
  bottom: 16px;
  width: auto;
  height: auto;
  max-height: none;
  border-radius: 12px;
}

#vkp-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(90deg, rgba(0,242,255,0.08), rgba(168,85,247,0.08));
}
.vkp-header-left { display: flex; align-items: center; gap: 10px; }
.vkp-status-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: #22e07a;
  box-shadow: 0 0 8px #22e07a;
}
#vkp-bot-name { color: var(--vkp-text); font-weight: 700; font-size: 14px; }
.vkp-bot-sub { color: var(--vkp-text-dim); font-size: 11px; }
.vkp-header-actions { display: flex; gap: 6px; }
.vkp-header-actions button {
  background: transparent; border: none; cursor: pointer;
  color: var(--vkp-text-dim);
  width: 30px; height: 30px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s, color 0.2s;
}
.vkp-header-actions button:hover { background: rgba(255,255,255,0.08); color: var(--vkp-cyan); }

#vkp-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
#vkp-chat-messages::-webkit-scrollbar { width: 6px; }
#vkp-chat-messages::-webkit-scrollbar-thumb { background: rgba(0,242,255,0.3); border-radius: 3px; }

.vkp-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--vkp-text);
  white-space: pre-wrap;
  word-break: break-word;
}
.vkp-msg.bot {
  align-self: flex-start;
  background: var(--vkp-bubble-bot);
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-bottom-left-radius: 4px;
}
.vkp-msg.user {
  align-self: flex-end;
  background: var(--vkp-bubble-user);
  border: 1px solid rgba(0, 242, 255, 0.3);
  border-bottom-right-radius: 4px;
}
.vkp-msg.typing { color: var(--vkp-text-dim); font-style: italic; }

.vkp-msg pre {
  background: #05050a;
  border: 1px solid rgba(0,242,255,0.25);
  border-radius: 10px;
  padding: 10px 12px;
  overflow-x: auto;
  margin: 8px 0;
  position: relative;
}
.vkp-msg pre code {
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 12.5px;
  color: #b7f7ff;
}
.vkp-msg code:not(pre code) {
  background: rgba(0,242,255,0.1);
  padding: 2px 5px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 12px;
}
.vkp-copy-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  background: rgba(255,255,255,0.08);
  border: none;
  color: var(--vkp-text-dim);
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 6px;
  cursor: pointer;
}
.vkp-copy-btn:hover { color: var(--vkp-cyan); }

#vkp-chat-form {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
#vkp-chat-input {
  flex: 1;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  padding: 10px 12px;
  color: var(--vkp-text);
  font-size: 13px;
  outline: none;
}
#vkp-chat-input:focus { border-color: var(--vkp-cyan); }
#vkp-send-btn {
  background: linear-gradient(135deg, var(--vkp-cyan), var(--vkp-purple));
  border: none;
  border-radius: 10px;
  width: 40px;
  color: #05050a;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.vkp-powered {
  text-align: center;
  font-size: 10px;
  color: var(--vkp-text-dim);
  padding-bottom: 8px;
}

.vkp-gate-btn {
  margin-top: 8px;
  display: inline-block;
  background: linear-gradient(135deg, var(--vkp-purple), var(--vkp-pink));
  color: #fff;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 12px;
  text-decoration: none;
}

@media (max-width: 480px) {
  #vkp-chat-window {
    right: 12px;
    left: 12px;
    width: auto;
  }
  #vkp-chat-window.vkp-expanded {
    width: auto;
  }
}