/*
  TRBL is the order used by four-value shorthand properties:
  top, right, bottom, left (clockwise from the top).
  Example: margin: 10px 20px 30px 40px;
*/

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 48px 24px;
  background: #f8fafc;
  color: #172033;
  font-family: Arial, sans-serif;
}

main {
  width: min(100%, 760px);
  margin: 0 auto;
}

h1 {
  margin: 0 0 8px;
}

.intro {
  margin: 0 0 32px;
  color: #475569;
}

.box-stage {
  position: relative;
  display: flow-root;
  margin-bottom: 48px;
  padding: 1px;
  background: #ffd6e5;
  outline: 3px dashed #e11d78;
  outline-offset: 4px;
}

.margin-label {
  position: absolute;
  top: 10px;
  left: 12px;
  padding: 3px 7px;
  background: #e11d78;
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.border-layer {
  position: relative;
  margin: 58px;
  border: 14px solid #f97316;
  background: #fed7aa;
  outline: 2px solid #c2410c;
}

.border-label {
  position: absolute;
  top: -10px;
  left: 10px;
  padding: 2px 6px;
  background: #c2410c;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}

.padding-layer {
  position: relative;
  padding: 52px;
  background: #bfdbfe;
  outline: 2px solid #2563eb;
}

.padding-label {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 2px 6px;
  background: #2563eb;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}

.content-layer {
  display: grid;
  min-height: 112px;
  place-items: center;
  background: #bbf7d0;
  outline: 2px solid #16a34a;
  color: #14532d;
  font-weight: 700;
}

.content-layer span {
  padding: 5px 9px;
  background: #16a34a;
  color: #ffffff;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h2 {
  margin: 0 0 16px;
  font-size: 1.25rem;
}

.comparison {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.sizing-box {
  padding: 24px;
  border: 6px solid #4f46e5;
  background: #e0e7ff;
  color: #312e81;
}

/* Declared width: 200px; actual rendered width: 260px (200 + 48px padding + 12px border). */
.content-box {
  box-sizing: content-box;
  width: 200px;
}

/* Declared width: 200px; actual rendered width: 200px (padding and border are included). */
.border-box {
  box-sizing: border-box;
  width: 200px;
}

.sizing-box strong,
.sizing-box span {
  display: block;
}

.sizing-box strong {
  margin-bottom: 8px;
}

.sizing-box span {
  font-size: 0.85rem;
}