/* Dense, Modern Dark-Mode System (WhatsApp + ProtectedText aesthetic) */
:root {
  --bg-dark: #0f172a;
  --bg-pane: #1e293b;
  --bg-card: #334155;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --border: #475569;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  height: 100vh;
  overflow: hidden;
  font-size: 13px;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Top Navigation Bar */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-pane);
  border-bottom: 1px solid var(--border);
  padding: 6px 12px;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  color: var(--accent-cyan);
}

.vault-auth-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  max-width: 420px;
}

.vault-auth-bar input {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

.status-indicators {
  display: flex;
  gap: 6px;
}

.status-badge {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  background: var(--bg-dark);
  border: 1px solid var(--border);
}

.status-badge.online { border-color: var(--accent-green); color: var(--accent-green); }
.status-badge.offline { border-color: var(--accent-red); color: var(--accent-red); }
.status-badge.crypto-on { background: var(--accent-green); color: #000; font-weight: bold; }

/* Workspace Split Layout */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.sidebar {
  width: 240px;
  background: var(--bg-pane);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.mode-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.mode-btn {
  flex: 1;
  padding: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 600;
}

.mode-btn.active {
  color: var(--accent-cyan);
  border-bottom: 2px solid var(--accent-cyan);
  background: rgba(6, 182, 212, 0.05);
}

.sidebar-pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  background: rgba(0,0,0,0.2);
  font-size: 11px;
  color: var(--text-muted);
}

.item-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
}

.tab-item {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-item:hover { background: var(--bg-card); }
.tab-item.active { background: var(--accent-cyan); color: #000; font-weight: 600; }

.content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--bg-dark);
}

.view-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Notes View */
.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--bg-pane);
  border-bottom: 1px solid var(--border);
}

.editor-toolbar input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-weight: bold;
  font-size: 14px;
}

#note-editor {
  flex: 1;
  background: var(--bg-dark);
  color: #e2e8f0;
  border: none;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  resize: none;
  outline: none;
}

/* Chat Feed View */
.chat-feed {
  flex: 1;
  padding: 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.msg-bubble {
  max-width: 70%;
  padding: 8px 10px;
  border-radius: 6px;
  word-break: break-word;
}

.msg-bubble.sent {
  align-self: flex-end;
  background: #064e3b;
  border: 1px solid #059669;
}

.msg-bubble.received {
  align-self: flex-start;
  background: var(--bg-pane);
  border: 1px solid var(--border);
}

.msg-meta {
  display: flex;
  justify-content: flex-end;
  gap: 4px;
  font-size: 9px;
  color: var(--text-muted);
  margin-top: 4px;
}

.msg-media { max-width: 100%; border-radius: 4px; margin-top: 4px; }
.msg-audio { width: 100%; height: 32px; margin-top: 4px; }

.chat-input-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px;
  background: var(--bg-pane);
  border-top: 1px solid var(--border);
}

.chat-input-bar textarea {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px;
  border-radius: 4px;
  resize: none;
}

/* Shared UI Components */
.btn-primary { background: var(--accent-cyan); color: #000; border: none; padding: 4px 10px; border-radius: 4px; font-weight: bold; cursor: pointer; }
.btn-small { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); padding: 2px 6px; font-size: 10px; border-radius: 3px; cursor: pointer; }
.btn-danger { background: var(--accent-red); color: #fff; border: none; padding: 4px 10px; border-radius: 4px; cursor: pointer; }
.btn-icon, .btn-primary-icon { background: var(--bg-card); border: 1px solid var(--border); color: var(--text-primary); padding: 6px 10px; border-radius: 4px; cursor: pointer; }
.btn-danger-icon { background: transparent; border: none; cursor: pointer; font-size: 14px; }
.hidden { display: none !important; }

/* Modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.8); display: flex; align-items: center; justify-content: center; }
.modal-content { background: var(--bg-pane); padding: 20px; border-radius: 8px; border: 1px solid var(--border); text-align: center; }