* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f5f6f8;
  color: #222;
}
.hidden { display: none !important; }

#topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  background: #fff;
  border-bottom: 1px solid #e0e0e0;
}
.site-title { font-weight: 600; font-size: 18px; }
#user-info { flex: 1; color: #666; font-size: 14px; }
#logout-btn {
  padding: 6px 14px;
  border: 1px solid #ccc;
  background: #fff;
  border-radius: 4px;
  cursor: pointer;
}
#logout-btn:hover { background: #f0f0f0; }

.login-box {
  max-width: 360px;
  margin: 80px auto;
  padding: 28px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}
.login-box h1 { font-size: 20px; margin-bottom: 20px; text-align: center; }
.login-box label {
  display: block;
  font-size: 14px;
  margin-bottom: 14px;
  color: #444;
}
.login-box input {
  width: 100%;
  margin-top: 6px;
  padding: 8px 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}
.login-box button[type="submit"] {
  width: 100%;
  padding: 10px;
  background: #2b6cb0;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 15px;
  cursor: pointer;
  margin-top: 4px;
}
.login-box button[type="submit"]:hover { background: #2c5282; }
.msg { margin-top: 12px; font-size: 13px; color: #c53030; min-height: 18px; text-align: center; }

#main-view { padding: 40px; }
#main-view h1 { margin-bottom: 12px; }