:root {
  --paper: #fffdf7;
  --ink: #1f2328;
  --muted: #586069;
  --line: rgba(55, 110, 255, 0.14);
  --margin: rgba(255, 72, 72, 0.28);
  --shadow: rgba(0, 0, 0, 0.10);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  color: var(--ink);
  background: #f2f3f5;
}

.topbar {
  max-width: 980px;
  margin: 24px auto 0;
  padding: 0 16px;
  display: flex;
  gap: 12px;
  align-items: baseline;
  justify-content: space-between;
}
.topbar a {
  color: #0b57d0;
  text-decoration: none;
}
.topbar a:hover { text-decoration: underline; }

.paper {
  max-width: 980px;
  margin: 12px auto 40px;
  padding: 28px 22px 30px 22px;
  background: var(--paper);
  border-radius: 14px;
  box-shadow: 0 12px 28px var(--shadow);
  position: relative;
  overflow: hidden;
}
.paper::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, transparent 62px, var(--margin) 62px, var(--margin) 64px, transparent 64px),
    repeating-linear-gradient(to bottom, transparent 0, transparent 26px, var(--line) 26px, var(--line) 27px);
  pointer-events: none;
}
.content {
  position: relative;
  padding-left: 72px;
}

h1 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 750;
}
.sub {
  margin: 0 0 18px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
}

.row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
}
.eq {
  font-variant-numeric: tabular-nums;
  min-width: 148px;
}

input[type="number"] {
  width: 120px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid rgba(31, 35, 40, 0.18);
  background: rgba(255,255,255,0.8);
}
input[type="number"]:focus {
  outline: 2px solid rgba(11, 87, 208, 0.25);
  border-color: rgba(11, 87, 208, 0.55);
}

.actions {
  margin-top: 18px;
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.btn {
  appearance: none;
  border: 1px solid rgba(31, 35, 40, 0.18);
  background: #0b57d0;
  color: white;
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 650;
}
.btn.secondary {
  background: white;
  color: var(--ink);
}
.btn:hover { filter: brightness(1.03); }

.score {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(11, 87, 208, 0.08);
  border: 1px solid rgba(11, 87, 208, 0.18);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}
.table th, .table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid rgba(31, 35, 40, 0.12);
}
.table th { color: var(--muted); font-weight: 700; }

.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(31, 35, 40, 0.16);
  background: rgba(255, 255, 255, 0.75);
}

.ok { color: #137333; }
.bad { color: #b3261e; }

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .content { padding-left: 64px; }
  .paper::before { background:
    linear-gradient(to right, transparent 54px, var(--margin) 54px, var(--margin) 56px, transparent 56px),
    repeating-linear-gradient(to bottom, transparent 0, transparent 26px, var(--line) 26px, var(--line) 27px);
  }
}