:root {
  /* светлая тема (по умолчанию) */
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel2: #f0f2f5;
  --border: #d5dbe0;
  --text: #0f1419;
  --muted: #66727f;
  --accent: #2ea6ff;
  --accent-hover: #1d8fe0;
  --danger: #e53935;
  --own-bubble: #dcf8c6;
}

html.dark {
  /* тёмная тема */
  --bg: #0e1621;
  --panel: #17212b;
  --panel2: #1e2c3a;
  --border: #2b3a4a;
  --text: #eef3f8;
  --muted: #8aa0b5;
  --accent: #2ea6ff;
  --accent-hover: #1d8fe0;
  --danger: #ff5c5c;
  --own-bubble: #2b5278;
}

* { box-sizing: border-box; }

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

.hidden { display: none !important; }

/* --- Авторизация --- */
.auth-view {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  width: 340px;
}

.auth-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.auth-top h1 { margin: 0; font-size: 22px; }

.tabs { display: flex; gap: 6px; margin-bottom: 18px; }

.tab {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

.tab.active { background: var(--panel2); color: var(--text); }

form label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }

input {
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  font-size: 14px;
}

input:focus { outline: none; border-color: var(--accent); }

button.primary {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
}

button.primary:hover { background: var(--accent-hover); }

button.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}

.theme-toggle {
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
}

.error { color: var(--danger); font-size: 13px; margin-top: 10px; }

.hint { font-size: 13px; color: var(--muted); margin: 0 0 12px; }

/* --- Чат --- */
.chat-view { display: flex; flex-direction: column; height: 100vh; }

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.header-actions { display: flex; gap: 8px; align-items: center; }

.room-bar { display: flex; gap: 8px; padding: 12px 16px; }
.room-bar input { flex: 1; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.message { max-width: 70%; }
.message.own { align-self: flex-end; }

.message .meta { font-size: 12px; color: var(--muted); margin-bottom: 2px; }
.message.own .meta { text-align: right; }

.message .bubble {
  background: var(--panel2);
  padding: 8px 12px;
  border-radius: 12px;
  word-break: break-word;
  white-space: pre-wrap;
}
.message.own .bubble { background: var(--own-bubble); }

.send-bar {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}
.send-bar input { flex: 1; }

.ws-status { padding: 4px 16px 12px; font-size: 12px; color: var(--muted); }