:root {
  --paper: #ece9e1;
  --sheet: #f7f5ef;
  --ink: #181818;
  --muted: #666055;
  --cyan: #00aeef;
  --magenta: #ec008c;
  --yellow: #ffe600;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Space Mono', monospace;
  color: var(--ink);
  background:
    radial-gradient(circle, rgba(0,0,0,0.05) 1px, transparent 1px) 0 0/10px 10px,
    var(--paper);
  display: flex;
  justify-content: center;
  padding: 54px 20px;
}

.wrap { width: 100%; max-width: 440px; text-align: center; }

header { margin-bottom: 24px; text-align: left; }
.tag { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--magenta); margin: 0 0 8px; }
h1 {
  font-family: 'Archivo Black', sans-serif;
  font-size: 30px;
  letter-spacing: 0.02em;
  margin: 0 0 12px;
}
.desc { font-size: 12.5px; color: var(--muted); line-height: 1.7; margin: 0; text-align: left; }
.desc code { background: rgba(0,0,0,0.06); padding: 1px 5px; font-size: 11.5px; }

.sheet {
  position: relative;
  background: var(--sheet);
  border: 1px solid #d8d4c8;
  padding: 40px 28px 24px;
}

.corner {
  position: absolute;
  font-size: 16px;
  color: var(--ink);
  opacity: 0.35;
  line-height: 1;
}
.corner.tl { top: 8px; left: 8px; }
.corner.tr { top: 8px; right: 8px; }
.corner.bl { bottom: 8px; left: 8px; }
.corner.br { bottom: 8px; right: 8px; }

form { display: flex; gap: 8px; margin-bottom: 24px; }
input {
  flex: 1;
  background: #fff;
  border: 1.5px solid var(--ink);
  padding: 10px 12px;
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  color: var(--ink);
}
input:focus { outline: none; border-color: var(--magenta); }

button {
  background: var(--ink);
  color: var(--sheet);
  border: none;
  font-family: 'Archivo Black', sans-serif;
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 0 16px;
  cursor: pointer;
  text-transform: uppercase;
}
button:hover { background: var(--magenta); }

.qr-box {
  background: #fff;
  border: 1.5px solid var(--ink);
  padding: 18px;
  display: inline-block;
}
.qr-box img { display: block; width: 220px; height: 220px; }

.cmyk {
  display: flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
  margin-top: 20px;
}
.swatch { width: 16px; height: 16px; display: inline-block; border: 1px solid rgba(0,0,0,0.15); }
.swatch.c { background: var(--cyan); }
.swatch.m { background: var(--magenta); }
.swatch.y { background: var(--yellow); }
.swatch.k { background: var(--ink); }
.spec { font-size: 10.5px; color: var(--muted); margin-left: 10px; letter-spacing: 0.02em; }

footer { margin-top: 24px; }
footer a { color: var(--muted); font-size: 11.5px; text-decoration: none; }
footer a:hover { color: var(--magenta); }