:root {
  --bg: #f3f5f7;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #1976d2;
  --primary-600: #1565c0;
  --danger: #e11d48;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.app { display: grid; grid-template-columns: 340px 1fr; height: 100vh; }

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  overflow: hidden; /* impede que a página role via sidebar */
  min-height: 0; /* permite filhos com overflow rolarem */
}

.brand { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.brand .logo { width: 32px; height: 32px; object-fit: cover; border-radius: 50%; border: 1px solid var(--border); background: var(--panel-2); display: block; }
.brand .title { font-weight: 700; }

.sidebar-actions { display: flex; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.btn-block { flex: 1; text-align: center; }

.search { padding: 10px 16px; border-bottom: 1px solid var(--border); }
.search input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); color: var(--text); }
.search input::placeholder { color: var(--muted); }
.brand .title { font-weight: 700; }

.section-title { padding: 10px 16px; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }

.conversation-list { list-style: none; padding: 0; margin: 0; flex: 1; overflow-y: auto; min-height: 0; }
.conversation-item { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); cursor: pointer; transition: background 0.2s ease; }
.conversation-item:hover { background: #f1f5f9; }
.conversation-item.active { background: #e6f0ff; border-left: 3px solid var(--primary); }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: #e2e8f0; display: grid; place-items: center; font-weight: 700; color: var(--text); }
.conv-meta { display: grid; gap: 2px; }
.conv-name { font-weight: 600; color: var(--text); }
.conv-last { font-size: 12px; color: var(--muted); }
.badge { margin-left: auto; background: #edf2f7; color: var(--muted); padding: 2px 8px; border-radius: 12px; font-size: 11px; }

.footnote { margin-top: auto; padding: 12px 16px; color: var(--muted); font-size: 12px; border-top: 1px solid var(--border); }

.main { display: grid; grid-template-rows: auto 1fr auto; overflow: hidden; min-height: 0; }
.chat-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--border); background: var(--panel-2); }
.subtitle { color: var(--muted); margin: 4px 0 0; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.btn { appearance: none; border: 1px solid var(--border); background: var(--panel); color: var(--text); padding: 8px 12px; border-radius: 8px; cursor: pointer; font-weight: 600; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary-600); }
.btn[disabled] { opacity: 0.6; cursor: not-allowed; }
.auth-status { color: var(--muted); font-size: 12px; }

.messages { padding: 20px; display: flex; flex-direction: column; gap: 12px; overflow-y: auto; background: var(--panel); min-height: 0; }
.message {
  max-width: 70%;
  padding: 12px 14px;
  border-radius: 12px;
  display: grid;
  gap: 6px;
}
.message .meta { font-size: 12px; color: var(--muted); display: flex; gap: 8px; }
.message .content { line-height: 1.45; }

.message.user { background: var(--primary); color: #fff; margin-left: auto; }
.message.user .meta { color: #fff; }
.message.user .author, .message.user .time { color: #fff; }
.message.ai { background: #eef2f6; border: 1px solid var(--border); }
.message.ai .author { color: var(--primary-600); font-weight: 600; }

.composer { border-top: 1px solid var(--border); padding: 12px 20px; background: var(--panel-2); }
.composer input { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--panel); color: var(--text); }
.composer input::placeholder { color: var(--muted); }

@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
}
.count-badge { margin-left: 8px; background: #edf2f7; color: var(--text); padding: 2px 8px; border-radius: 12px; font-size: 11px; border: 1px solid var(--border); }

/* Auth overlay */
.auth-overlay { position: fixed; inset: 0; background: rgba(15,23,42,0.6); display: grid; place-items: center; z-index: 1000; }
.auth-overlay.hidden { display: none; }
.auth-card { width: 360px; max-width: calc(100% - 40px); background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.15); }
.auth-form { display: grid; gap: 12px; margin-top: 10px; }
.auth-form label { display: grid; gap: 6px; }
.auth-form input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); color: var(--text); }
.auth-error { margin-top: 6px; color: var(--danger); font-size: 13px; }

/* Botão WhatsApp verde */
.btn-success { background: #25D366; color: #fff; border-color: #1DA851; }
.btn-success:hover { background: #1DA851; }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(15,23,42,0.6); display: grid; place-items: center; z-index: 1000; }
.modal.hidden { display: none; }
.modal-content { width: 400px; max-width: calc(100% - 40px); background: var(--panel); border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.15); overflow: hidden; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--border); background: var(--panel-2); }
.modal-header h2 { margin: 0; font-size: 18px; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--muted); padding: 0; line-height: 1; }
.modal-close:hover { color: var(--text); }
.modal-body { padding: 20px; text-align: center; }

/* WhatsApp status */
.whatsapp-status { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 16px; }
.status-indicator { width: 12px; height: 12px; border-radius: 50%; }
.status-indicator.loading { background: #f59e0b; animation: pulse 1s infinite; }
.status-indicator.connected { background: #25D366; }
.status-indicator.disconnected { background: var(--danger); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

.qrcode-container { margin-top: 16px; }
.qrcode-container p { margin: 0 0 12px; color: var(--muted); }
.pairing-code { font-size: 28px; font-weight: 700; letter-spacing: 4px; color: var(--primary); margin-bottom: 16px; font-family: monospace; }
.qrcode-img { display: flex; justify-content: center; }
.qrcode-img img { max-width: 200px; border-radius: 8px; }

.connected-info { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 20px; font-weight: 600; color: #25D366; }
.connecting-info { display: flex; align-items: center; justify-content: center; gap: 10px; padding: 12px; font-weight: 500; color: #f59e0b; background: #fef3c7; border-radius: 8px; margin-top: 12px; }
.status-indicator.connecting { background: #f59e0b; animation: pulse 1s infinite; }

/* Botão secundário */
.btn-secondary { background: #6366f1; color: #fff; border-color: #4f46e5; }
.btn-secondary:hover { background: #4f46e5; }
.btn-sm { padding: 6px 10px; font-size: 13px; }

/* Modal grande */
.modal-large { width: 700px; max-width: calc(100% - 40px); max-height: 90vh; display: flex; flex-direction: column; }
.modal-large .modal-body { overflow-y: auto; text-align: left; flex: 1; }

/* Tabs */
.tabs { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 2px solid var(--border); }
.tab-btn { background: none; border: none; padding: 12px 20px; font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: all 0.2s; }
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }
.tab-content.hidden { display: none; }

/* Form elements */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.input { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); color: var(--text); font-size: 14px; }
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1); }
.textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); color: var(--text); font-size: 14px; min-height: 100px; resize: vertical; font-family: inherit; }
.textarea-large { width: 100%; padding: 14px 16px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); color: var(--text); font-size: 14px; min-height: 300px; resize: vertical; font-family: inherit; line-height: 1.6; }
.textarea:focus, .textarea-large:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1); }

.form-actions { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.save-status { font-size: 13px; color: var(--muted); }
.save-status.success { color: #25D366; }
.save-status.error { color: var(--danger); }

/* FAQs */
.faqs-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.faqs-header .subtitle { margin: 0; }
.faqs-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.faq-question { font-weight: 600; color: var(--text); margin-bottom: 8px; display: flex; align-items: flex-start; gap: 8px; }
.faq-question::before { content: 'P:'; color: var(--primary); font-weight: 700; flex-shrink: 0; }
.faq-answer { color: var(--muted); font-size: 14px; line-height: 1.5; display: flex; align-items: flex-start; gap: 8px; }
.faq-answer::before { content: 'R:'; color: #25D366; font-weight: 700; flex-shrink: 0; }
.faq-actions { display: flex; gap: 8px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.btn-icon { background: none; border: 1px solid var(--border); padding: 6px 10px; border-radius: 6px; cursor: pointer; font-size: 12px; color: var(--muted); transition: all 0.2s; }
.btn-icon:hover { background: var(--panel); color: var(--text); }
.btn-icon.danger:hover { background: #fef2f2; color: var(--danger); border-color: var(--danger); }

.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }
.empty-state p { margin: 0; }

/* Audio TTS Button */
.audio-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 6px;
  margin-left: auto;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.2s ease;
}
.audio-btn:hover {
  background: rgba(25, 118, 210, 0.1);
  transform: scale(1.1);
}
.audio-btn.loading {
  opacity: 0.6;
  cursor: wait;
}
.audio-btn.playing {
  color: var(--danger);
}
.audio-btn svg {
  display: block;
}
.audio-btn .spin {
  animation: spin 1s linear infinite;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Ajustar meta para acomodar o botão de áudio */
.message .meta {
  display: flex;
  align-items: center;
}