/* DDU FAQ Chatbot v2 — FAQ-First Styles */
:root {
  --ddu-primary: #1a5276;
  --ddu-primary-dark: #154360;
  --ddu-primary-light: #2980b9;
  --ddu-accent: #e67e22;
  --ddu-bg: #ffffff;
  --ddu-bg2: #f4f6f8;
  --ddu-text: #2c3e50;
  --ddu-text-light: #7f8c8d;
  --ddu-border: #dde1e3;
  --ddu-shadow: 0 10px 40px rgba(26,82,118,0.22);
  --ddu-radius: 18px;
  --ddu-btn-size: 58px;
}

/* === Toggle Button === */
#ddu-chat-toggle {
  position: fixed; bottom: 24px; right: 24px;
  width: var(--ddu-btn-size); height: var(--ddu-btn-size);
  border-radius: 50%; background: var(--ddu-primary);
  color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; box-shadow: 0 4px 20px rgba(26,82,118,0.4);
  z-index: 99999; transition: background 0.2s, transform 0.2s; outline: none;
}
#ddu-chat-toggle:hover { background: var(--ddu-primary-dark); transform: scale(1.07); }
#ddu-chat-toggle.ddu-pos-left { right: auto; left: 24px; }
#ddu-chat-toggle::after {
  content: ''; position: absolute; inset: -5px; border-radius: 50%;
  border: 3px solid var(--ddu-primary-light); opacity: 0;
  animation: ddu-pulse 2.5s ease-out 0.5s 3;
}
@keyframes ddu-pulse {
  0%   { opacity: 0.6; transform: scale(1); }
  100% { opacity: 0;   transform: scale(1.6); }
}
.ddu-notif {
  position: absolute; top: 5px; right: 5px;
  width: 11px; height: 11px; background: var(--ddu-accent);
  border-radius: 50%; border: 2px solid #fff;
}

/* === Chat Window === */
#ddu-chat-window {
  position: fixed; bottom: 96px; right: 24px;
  width: 380px; max-width: calc(100vw - 32px);
  height: 580px; max-height: calc(100vh - 120px);
  background: var(--ddu-bg); border-radius: var(--ddu-radius);
  box-shadow: var(--ddu-shadow); display: flex; flex-direction: column;
  z-index: 99998; overflow: hidden; border: 1px solid var(--ddu-border);
  opacity: 0; transform: translateY(18px) scale(0.97); pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}
#ddu-chat-window.ddu-open {
  opacity: 1; transform: translateY(0) scale(1); pointer-events: all;
}
#ddu-chat-window.ddu-pos-left { right: auto; left: 24px; }

/* === Header === */
.ddu-header {
  background: var(--ddu-primary); color: #fff;
  padding: 14px 14px; display: flex; align-items: center; gap: 10px; flex-shrink: 0;
}
.ddu-avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.18);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.ddu-header-info { flex: 1; min-width: 0; }
.ddu-bot-name { font-weight: 700; font-size: 14px; }
.ddu-status { font-size: 11px; opacity: 0.8; display: flex; align-items: center; gap: 4px; }
.ddu-status-dot { width: 7px; height: 7px; background: #2ecc71; border-radius: 50%; }
.ddu-close-btn, .ddu-back-btn {
  background: none; border: none; color: #fff; cursor: pointer;
  opacity: 0.8; padding: 4px 6px; line-height: 1; border-radius: 6px;
  font-size: 13px; font-weight: 600; white-space: nowrap;
}
.ddu-close-btn { font-size: 18px; }
.ddu-close-btn:hover, .ddu-back-btn:hover { opacity: 1; background: rgba(255,255,255,0.15); }

/* === Body === */
.ddu-body {
  flex: 1; overflow-y: auto; display: flex; flex-direction: column;
  background: var(--ddu-bg2);
}
.ddu-body::-webkit-scrollbar { width: 4px; }
.ddu-body::-webkit-scrollbar-thumb { background: var(--ddu-border); border-radius: 4px; }

/* === Home View === */
.ddu-home { display: flex; flex-direction: column; flex: 1; }
.ddu-greeting {
  padding: 16px 16px 10px;
  background: linear-gradient(135deg, rgba(26,82,118,0.06), rgba(41,128,185,0.04));
  border-bottom: 1px solid var(--ddu-border);
}
.ddu-greeting p { margin: 0 0 4px; font-size: 13.5px; color: var(--ddu-text); font-weight: 500; }
.ddu-sub { font-size: 12px !important; color: var(--ddu-text-light) !important; font-weight: 400 !important; }

/* === FAQ Card List === */
.ddu-faq-list {
  flex: 1; display: flex; flex-direction: column; gap: 0; padding: 8px 0;
}
.ddu-faq-card {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; background: var(--ddu-bg);
  border: none; border-bottom: 1px solid var(--ddu-border);
  cursor: pointer; text-align: left; width: 100%;
  transition: background 0.15s; color: var(--ddu-text);
  font-size: 13.5px; font-family: inherit;
}
.ddu-faq-card:first-child { border-top: 1px solid var(--ddu-border); margin-top: 0; }
.ddu-faq-card:hover { background: rgba(26,82,118,0.06); }
.ddu-faq-card:active { background: rgba(26,82,118,0.12); }
.ddu-faq-icon { font-size: 17px; flex-shrink: 0; width: 24px; text-align: center; }
.ddu-faq-q { flex: 1; line-height: 1.4; font-weight: 500; }
.ddu-faq-arr { color: var(--ddu-primary-light); font-size: 20px; font-weight: 300; flex-shrink: 0; }

/* === Answer View === */
.ddu-answer-view {
  flex: 1; padding: 16px; display: flex; flex-direction: column; gap: 14px;
}
.ddu-answer-hd {
  font-size: 15px; font-weight: 700; color: var(--ddu-primary);
  display: flex; align-items: flex-start; gap: 8px; line-height: 1.4;
  padding-bottom: 12px; border-bottom: 2px solid rgba(26,82,118,0.12);
}
.ddu-answer-body { font-size: 13.5px; line-height: 1.7; color: var(--ddu-text); }
.ddu-answer-body p { margin: 0 0 10px; }
.ddu-answer-body ul, .ddu-answer-body ol { margin: 6px 0 10px; padding-left: 18px; }
.ddu-answer-body li { margin-bottom: 5px; }
.ddu-answer-body strong { color: var(--ddu-primary-dark); }

/* Page Links */
.ddu-link-group {
  border-top: 1px solid var(--ddu-border);
  padding-top: 12px; margin-top: auto; display: flex; flex-direction: column; gap: 6px;
}
.ddu-link-label {
  font-size: 11px; color: var(--ddu-text-light); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 2px;
}
.ddu-page-link {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px; border-radius: 10px;
  background: rgba(26,82,118,0.06); border: 1px solid rgba(26,82,118,0.15);
  color: var(--ddu-primary); font-size: 13px; font-weight: 500;
  text-decoration: none; transition: background 0.15s, transform 0.1s;
}
.ddu-page-link:hover { background: rgba(26,82,118,0.13); transform: translateX(2px); }
.ddu-ext { font-size: 12px; opacity: 0.6; }

/* === Chat / Messages View === */
.ddu-messages {
  flex: 1; overflow-y: auto; padding: 14px; display: flex;
  flex-direction: column; gap: 10px;
}
.ddu-messages::-webkit-scrollbar { width: 4px; }
.ddu-messages::-webkit-scrollbar-thumb { background: var(--ddu-border); border-radius: 4px; }
.ddu-msg { display: flex; gap: 8px; align-items: flex-end; animation: ddu-in 0.2s ease; }
@keyframes ddu-in { from { opacity:0; transform:translateY(6px); } to { opacity:1; } }
.ddu-msg.ddu-user { flex-direction: row-reverse; }
.ddu-msg-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--ddu-primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; flex-shrink: 0;
}
.ddu-msg.ddu-user .ddu-msg-avatar { background: var(--ddu-accent); }
.ddu-bubble {
  max-width: 82%; padding: 10px 14px; border-radius: 16px;
  font-size: 13.5px; line-height: 1.6; color: var(--ddu-text);
  background: var(--ddu-bg); border: 1px solid var(--ddu-border); word-break: break-word;
}
.ddu-msg.ddu-bot .ddu-bubble { border-radius: 16px 16px 16px 4px; }
.ddu-msg.ddu-user .ddu-bubble {
  background: var(--ddu-primary); color: #fff;
  border-color: var(--ddu-primary); border-radius: 16px 16px 4px 16px;
}
.ddu-bubble ul { margin: 6px 0 4px; padding-left: 16px; }
.ddu-bubble li { margin-bottom: 3px; }
.ddu-bubble a { color: var(--ddu-primary-light); text-decoration: underline; }
.ddu-source-link { font-size: 11px; margin-top: 6px; opacity: 0.7; }

/* Typing dots */
.ddu-dots { display: flex; gap: 4px; align-items: center; padding: 2px 0; }
.ddu-dots span {
  width: 7px; height: 7px; background: var(--ddu-text-light);
  border-radius: 50%; animation: ddu-bounce 1.2s infinite;
}
.ddu-dots span:nth-child(2) { animation-delay: 0.2s; }
.ddu-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes ddu-bounce { 0%,80%,100% { transform:translateY(0); } 40% { transform:translateY(-6px); } }

/* === Input Area === */
.ddu-input-area {
  padding: 10px 12px; border-top: 1px solid var(--ddu-border);
  display: flex; gap: 8px; align-items: flex-end;
  background: var(--ddu-bg); flex-shrink: 0;
}
.ddu-input-area textarea {
  flex: 1; border: 1px solid var(--ddu-border); border-radius: 20px;
  padding: 9px 14px; font-size: 13px; resize: none; outline: none;
  font-family: inherit; color: var(--ddu-text); background: var(--ddu-bg2);
  line-height: 1.4; max-height: 100px; transition: border-color 0.15s;
}
.ddu-input-area textarea:focus { border-color: var(--ddu-primary); }
.ddu-input-area textarea::placeholder { color: var(--ddu-text-light); }
.ddu-send-btn {
  width: 38px; height: 38px; border-radius: 50%; background: var(--ddu-primary);
  border: none; color: #fff; cursor: pointer; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: background 0.15s, transform 0.1s;
}
.ddu-send-btn:hover { background: var(--ddu-primary-dark); }
.ddu-send-btn:active { transform: scale(0.93); }
.ddu-send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* === Footer === */
.ddu-footer {
  text-align: center; font-size: 10.5px; color: var(--ddu-text-light);
  padding: 5px 12px 8px; background: var(--ddu-bg);
  border-top: 1px solid var(--ddu-border); flex-shrink: 0;
}

/* === Mobile === */
@media (max-width: 480px) {
  #ddu-chat-window {
    bottom: 0; right: 0; left: 0; width: 100%; max-width: 100%;
    max-height: 92vh; border-radius: var(--ddu-radius) var(--ddu-radius) 0 0;
  }
  #ddu-chat-toggle { bottom: 16px; right: 16px; }
}