:root {
  --bg: #f7f5f2;
  --panel: #ffffff;
  --border: #e4e0da;
  --text: #2b2a28;
  --muted: #8a8580;
  --accent: #2f6f4f;
  --accent-dark: #24593f;
  --bubble-in: #eef0ef;
  --bubble-out: #dcefe2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 0.85em; }

/* Login */
.login-screen {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}
.login-box h1 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}
.login-box input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
}
.login-box button {
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 1rem;
  cursor: pointer;
}
.login-box button:hover { background: var(--accent-dark); }
.error { color: #b3261e; font-size: 0.85rem; margin: 0; }

/* App layout */
.app {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-header {
  padding: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.sidebar-header button {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 0.8rem;
}

.wa-status-banner {
  padding: 8px 16px;
  background: #fdecea;
  color: #b3261e;
  font-size: 0.8rem;
  border-bottom: 1px solid var(--border);
}

.conversation-list {
  overflow-y: auto;
  flex: 1;
}

.wa-connect-screen {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.wa-connect-box {
  text-align: center;
  max-width: 340px;
  padding: 32px;
}
.wa-connect-box h2 {
  margin-top: 0;
}
.wa-connect-box img {
  width: 220px;
  height: 220px;
  margin: 16px 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: white;
}
.conversation-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.conversation-item:hover { background: var(--bg); }
.conversation-item.active { background: var(--bubble-out); }
.conversation-item .name { font-weight: 600; font-size: 0.95rem; }
.conversation-item .preview {
  font-size: 0.85rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.chat-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}
.chat-active {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.chat-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.bubble {
  max-width: 60%;
  padding: 8px 12px;
  border-radius: 12px;
  font-size: 0.92rem;
  line-height: 1.35;
  white-space: pre-wrap;
  word-break: break-word;
}
.bubble.in {
  align-self: flex-start;
  background: var(--bubble-in);
  border-bottom-left-radius: 2px;
}
.bubble.out {
  align-self: flex-end;
  background: var(--bubble-out);
  border-bottom-right-radius: 2px;
}
.bubble .meta {
  display: block;
  margin-top: 4px;
  font-size: 0.7rem;
  color: var(--muted);
}

.send-form {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--panel);
}
.send-form textarea {
  flex: 1;
  resize: none;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
}
.send-form button {
  padding: 0 18px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  cursor: pointer;
}
.send-form button:hover { background: var(--accent-dark); }