:root {
  --paper: #efe3c8;
  --paper-dark: #d8c49b;
  --ink: #182433;
  --muted: #5f594d;
  --navy: #101a2b;
  --brass: #9b7a32;
  --line: #2b2b2b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top, rgba(255,255,255,.35), transparent 35%),
    linear-gradient(135deg, #d8c49b, #f3ead8 45%, #cdb98d);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.6;
}

.site-header {
  background: var(--navy);
  color: var(--paper);
  border-bottom: 6px solid var(--brass);
  padding: 24px 7%;
}

.brand {
  display: flex;
  gap: 18px;
  align-items: center;
}

.mark {
  border: 3px double var(--brass);
  color: var(--brass);
  width: 78px;
  height: 78px;
  display: grid;
  place-items: center;
  font-weight: bold;
  letter-spacing: 1px;
  border-radius: 50%;
  background: #111827;
  box-shadow: inset 0 0 0 4px #111827,
              inset 0 0 0 6px var(--brass);
  font-size: 1.1rem;
  text-align: center;
}

h1,
h2,
h3 {
  margin: 0 0 10px;
  line-height: 1.1;
  letter-spacing: .04em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2rem, 5vw, 4rem);
}

.site-header p {
  margin: 0;
  color: #d8c49b;
}

nav {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

nav a,
button {
  background: var(--brass);
  color: #111;
  border: 2px solid #111;
  padding: 10px 14px;
  text-decoration: none;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: .08em;
  cursor: pointer;
  box-shadow: 3px 3px 0 #000;
}

nav a:hover,
button:hover {
  transform: translateY(-1px);
}

main {
  max-width: 1100px;
  margin: 34px auto;
  padding: 0 18px;
}

.hero,
.card {
  background: rgba(239,227,200,.92);
  border: 2px solid var(--line);
  box-shadow: 8px 8px 0 rgba(16,26,43,.25);
  padding: 28px;
  margin-bottom: 28px;
  position: relative;
}

.hero::before,
.card::before {
  content: "CASE FILE";
  position: absolute;
  top: -14px;
  left: 22px;
  background: var(--navy);
  color: var(--paper);
  border: 2px solid var(--line);
  padding: 2px 10px;
  font-size: .75rem;
  letter-spacing: .12em;
  font-weight: bold;
}

.eyebrow {
  color: var(--brass);
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: .14em;
}

.lookup-box {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0;
}

input {
  flex: 1;
  min-width: 240px;
  background: #fbf5e8;
  border: 2px solid var(--line);
  padding: 12px;
  font-size: 1rem;
  font-family: "Courier New", monospace;
}

.result {
  margin-top: 18px;
  border: 2px dashed var(--line);
  background: #fbf5e8;
  padding: 18px;
  font-family: "Courier New", monospace;
}

.hidden {
  display: none;
}

.warning {
  border-left: 6px solid var(--brass);
  padding-left: 14px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 24px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

footer {
  text-align: center;
  padding: 30px;
  color: var(--paper);
  background: var(--navy);
  border-top: 6px solid var(--brass);
}