html {
  font-family: 'Crimson Text', serif;
  font-size: 16px;
  background: crimson;
  color: #000;
}

body {
  margin: 0;
}

.content-box {
  background: #fff;
  max-width: 900px;
  margin: 40px auto;
  padding: 40px 60px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,0,0,0.15);
}

h1 {
  text-align: center;
  font-size: 3rem;
  margin: 0 0 10px;
}

.summary {
  text-align: center;
  color: #555;
  margin-bottom: 40px;
}

.property-group {
  margin-bottom: 40px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
}

.property-group h2 {
  font-size: 1.8rem;
  margin-top: 0;
  margin-bottom: 20px;
  border-bottom: 1px solid #ccc;
  padding-bottom: 6px;
}

.label {
  width: 100px;
  font-weight: 600;
  color: #666;
}

.fw-regular {
    font weight: 400;
}
.fw-semibold { 
    font-weight: 600; 
}
.fw-bold     { 
    font-weight: 700; 
}

.fs-normal { 
    font-style: normal; 
}
.fs-italic { 
    font-style: italic; 
}

.ls-normal { 
    letter-spacing: normal; 
}
.ls-wide   { 
    letter-spacing: 0.08em; 
}
.ls-tight  { 
    letter-spacing: -0.05em; 
}

.tt-none  { 
    text-transform: none; 
}
.tt-upper { 
    text-transform: uppercase; 
}
.tt-lower { 
    text-transform: lowercase; 
}
.tt-cap   { 
    text-transform: capitalize; 
}

.td-none  { 
    text-decoration: none; 
}
.td-under { 
    text-decoration: underline; 
}
.td-line  { 
    text-decoration: line-through; 
}
.td-over  { 
    text-decoration: overline; 
}