:root {
  color: #172033;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: #f4f7fb;
}

* { box-sizing: border-box; }

body { margin: 0; }

.page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 1.5rem;
}

.card {
  width: min(100%, 44rem);
  padding: clamp(1.5rem, 5vw, 3rem);
  border: 1px solid #e2e8f0;
  border-radius: 1rem;
  background: #fff;
  box-shadow: 0 1.25rem 3.5rem rgb(25 45 75 / 0.1);
}

.eyebrow {
  margin: 0;
  color: #596780;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 { margin: 0.5rem 0 0; font-size: clamp(1.75rem, 5vw, 2.5rem); }

.lead, .notice { color: #536078; line-height: 1.55; }

.upload-form { display: grid; gap: 1rem; margin-top: 2rem; }

.file-field { display: grid; gap: 0.5rem; font-weight: 700; }

input[type="file"] {
  width: 100%;
  padding: 0.7rem;
  border: 1px dashed #94a3b8;
  border-radius: 0.5rem;
  background: #f8fafc;
}

button, .downloads a {
  display: inline-flex;
  justify-content: center;
  padding: 0.85rem 1.1rem;
  border: 0;
  border-radius: 0.5rem;
  background: #172033;
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
}

button:hover, .downloads a:hover { background: #283754; }

.legend, .stats { display: grid; gap: 0.75rem; margin: 2rem 0 0; }

.legend div, .stats div { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }

.legend dt, .legend dd, .stats dt, .stats dd { margin: 0; }

.legend dd, .stats dt { color: #536078; }

.stats dd { font-size: 1.25rem; font-weight: 700; }

.legend__mark { width: 1.1rem; height: 1.1rem; border-radius: 0.2rem; }
.legend__mark--changed { background: #e2f0d9; }
.legend__mark--identical { background: #fff2cc; }

.downloads { display: grid; gap: 0.75rem; margin-top: 2rem; }
.back-link { display: inline-block; margin-top: 1.5rem; color: #283754; }