/* Kno v3 — Tools & Chat Styles (Clean Dark) */

/* Chat layout */
.chat-layout{display:flex;height:calc(100vh - var(--header-height) - 50px);gap:0}
.chat-area{flex:1;display:flex;flex-direction:column;min-width:0}
.chat-messages{flex:1;overflow-y:auto;padding:20px 24px}

/* Welcome */
.welcome-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;height:100%;gap:12px;padding:40px}
.welcome-icon{margin-bottom:8px;opacity:0.7}
.welcome-state h2{font-size:1.4rem}
.welcome-state p{color:var(--text-muted);max-width:420px;font-size:0.9rem}
.suggestions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px;max-width:500px;width:100%}
.suggestion-card{display:flex;align-items:center;gap:12px;padding:14px 18px;border:1px solid var(--border);border-radius:var(--radius-lg);text-align:left;transition:all var(--transition-fast);cursor:pointer;background:var(--bg-card)}
.suggestion-card:hover{border-color:var(--text-muted);background:var(--bg-card-hover)}
.suggestion-card div{display:flex;flex-direction:column;gap:2px}
.suggestion-card strong{font-size:0.85rem}
.suggestion-card small{font-size:0.72rem}
.suggestion-card svg{color:var(--text-muted);flex-shrink:0}

/* Input area */
.chat-input-area{padding:14px 24px;border-top:1px solid var(--border);background:var(--bg-secondary)}
.chat-input-wrap{display:flex;gap:10px;align-items:flex-end;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:6px 6px 6px 16px;transition:var(--transition)}
.chat-input-wrap:focus-within{border-color:var(--border-focus)}
.chat-input{flex:1;border:none;outline:none;resize:none;background:transparent;font-size:0.88rem;line-height:1.5;max-height:120px;padding:8px 0;color:var(--text-primary)}
.chat-input::placeholder{color:var(--text-muted)}
.chat-send{width:34px;height:34px;border-radius:var(--radius-md);background:var(--text-primary);color:var(--bg-primary);display:flex;align-items:center;justify-content:center;transition:var(--transition);flex-shrink:0}
.chat-send:hover{opacity:0.85}
.chat-send:disabled{opacity:0.2;cursor:not-allowed}

/* Messages */
.msg{display:flex;gap:12px;margin-bottom:20px;animation:fadeInUp 0.3s var(--ease)}
.msg-avatar{width:30px;height:30px;border-radius:var(--radius-md);background:var(--bg-tertiary);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--text-muted)}
.msg-user .msg-avatar{background:var(--accent-bg)}
.msg-bubble{flex:1;font-size:0.9rem;line-height:1.7;color:var(--text-secondary)}
.msg-bubble p{margin-bottom:8px}
.msg-bubble strong{color:var(--text-primary)}
.msg-bubble h1,.msg-bubble h2,.msg-bubble h3{color:var(--text-primary);margin:12px 0 6px}
.msg-bubble code{background:var(--bg-code);padding:2px 6px;border-radius:var(--radius-xs);font-family:var(--font-mono);font-size:0.84em;border:1px solid var(--border)}
.msg-bubble pre{background:var(--bg-code);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px;margin:10px 0;overflow-x:auto}
.msg-bubble pre code{background:none;padding:0;border:none;font-size:0.82rem;line-height:1.6}
.msg-bubble li{margin-left:20px;list-style:disc;margin-bottom:4px}
.msg-bubble hr{border:none;height:1px;background:var(--border);margin:16px 0}

.typing-dots{display:flex;gap:5px;padding:8px 0}
.typing-dots span{width:7px;height:7px;border-radius:50%;background:var(--text-muted);animation:typingDot 1.2s ease-in-out infinite}
.typing-dots span:nth-child(2){animation-delay:0.15s}
.typing-dots span:nth-child(3){animation-delay:0.3s}

/* Tools panel */
.tools-panel{width:340px;background:var(--bg-secondary);border-left:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0}
.tools-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}
.tools-title{display:flex;align-items:center;gap:8px;font-size:0.82rem;font-weight:600;color:var(--text-secondary)}
.tools-toggle{color:var(--text-muted)}
.tools-tabs{display:flex;gap:4px;padding:10px 16px;border-bottom:1px solid var(--border);overflow-x:auto}
.tools-body{flex:1;overflow-y:auto;padding:16px}
.tab-pane{display:none}.tab-pane.active{display:block}
.tools-section-title{font-size:1rem;margin-bottom:14px;font-weight:700}
.tools-open-btn{margin-left:auto}

/* Plan */
.plan-phase{margin-bottom:16px}
.plan-phase-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.plan-task{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:0.85rem;color:var(--text-secondary);cursor:pointer}
.plan-task input[type=checkbox]{accent-color:var(--sage)}
.plan-task input:checked+span{text-decoration:line-through;color:var(--text-muted)}

/* Flashcard in panel */
.fc-container{text-align:center}
.fc-counter{font-size:0.78rem;color:var(--text-muted);margin-bottom:10px;font-weight:600}
.fc-card{perspective:600px;height:200px;cursor:pointer;margin-bottom:12px}
.fc-card-lg{height:280px}
.fc-face{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;border-radius:var(--radius-lg);backface-visibility:hidden;transition:transform 0.5s var(--ease);border:1px solid var(--border);gap:8px;text-align:center}
.fc-front{background:var(--bg-card)}
.fc-back{background:var(--bg-tertiary);transform:rotateY(180deg)}
.fc-card.flipped .fc-front{transform:rotateY(180deg)}
.fc-card.flipped .fc-back{transform:rotateY(0)}
.fc-label{display:flex;align-items:center;gap:4px}
.fc-hint{margin-top:auto;display:flex;align-items:center;gap:4px}
.fc-nav{display:flex;gap:10px;justify-content:center}

/* Quiz in panel */
.quiz-card{display:flex;flex-direction:column;gap:12px}
.quiz-progress{display:flex;align-items:center;gap:6px}
.quiz-q{font-weight:600;font-size:0.95rem;line-height:1.5}
.quiz-opt{display:flex;align-items:center;gap:10px;padding:11px 14px;border:1px solid var(--border);border-radius:var(--radius-md);font-size:0.85rem;cursor:pointer;transition:all var(--transition-fast);width:100%;text-align:left;background:var(--bg-card)}
.quiz-opt:hover{border-color:var(--text-muted);background:var(--bg-card-hover)}
.quiz-opt-letter{width:22px;height:22px;border-radius:var(--radius-xs);background:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:0.75rem;flex-shrink:0;color:var(--text-muted)}
.quiz-opt.correct{border-color:var(--sage);background:var(--sage-bg)}
.quiz-opt.correct .quiz-opt-letter{background:var(--sage);color:#fff}
.quiz-opt.wrong{border-color:var(--red);background:var(--red-bg)}
.quiz-opt.wrong .quiz-opt-letter{background:var(--red);color:#fff}
.quiz-exp{display:flex;align-items:flex-start;gap:8px;padding:12px;border-radius:var(--radius-md);font-size:0.82rem;line-height:1.5;margin-top:8px}
.quiz-exp-correct{background:var(--sage-bg);color:var(--sage)}
.quiz-exp-wrong{background:var(--red-bg);color:var(--red)}
.quiz-next{margin-top:8px;align-self:flex-end}
.quiz-results{display:flex;flex-direction:column;align-items:center;text-align:center;gap:12px;padding:40px}
.quiz-results-icon{opacity:0.7}

/* Key points */
.key-point{display:flex;align-items:flex-start;gap:10px;padding:10px 0;border-bottom:1px solid var(--border);font-size:0.85rem;color:var(--text-secondary)}
.key-point svg{flex-shrink:0;color:var(--amber);margin-top:2px}

/* Listener */
.listener-area{max-width:700px}
.listener-status{display:flex;align-items:center;gap:14px;padding:18px 22px}
.listener-dot{width:12px;height:12px;border-radius:50%;background:var(--text-muted);flex-shrink:0;transition:var(--transition)}
.listener-dot.recording{background:var(--red);animation:pulse 1.5s infinite}
.listener-transcript{max-height:300px;overflow-y:auto;font-size:0.9rem;line-height:1.7;color:var(--text-secondary)}

/* Study flashcard page */
.study-fc-container{max-width:500px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:16px}

@media(max-width:900px){
  .tools-panel{position:fixed;top:0;right:0;height:100vh;width:320px;z-index:60;transform:translateX(100%);transition:transform var(--transition)}
  .tools-panel.open{transform:translateX(0)}
}
@media(max-width:640px){
  .chat-messages{padding:16px}
  .suggestions{grid-template-columns:1fr}
  .msg{gap:8px}
}