:root {
  --bg: #f3efe6;
  --ink: #1c2418;
  --muted: #5c6756;
  --line: #cfc6b4;
  --card: #fffdf8;
  --accent: #2f5d3a;
  --accent-ink: #f7f3ea;
  --error: #8a2f2f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, #e7efdf 0, transparent 40%),
    linear-gradient(180deg, #efe9db 0%, var(--bg) 100%);
  min-height: 100vh;
}

.wrap {
  width: min(720px, calc(100% - 2rem));
  margin: 2rem auto 3rem;
}

.wrap.wide {
  width: min(1100px, calc(100% - 2rem));
}

h1 {
  font-size: 1.75rem;
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}

.lead, .meta, .footnote, .hint {
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1.25rem;
  display: grid;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
  font-weight: 600;
}

input, select, button {
  width: 100%;
  font: inherit;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

button {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  cursor: pointer;
  font-weight: 600;
  margin-top: 0.4rem;
}

button:hover { filter: brightness(1.05); }

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
}

.hint { font-size: 0.8rem; display: block; margin-top: 0.25rem; }
.footnote { margin-top: 1rem; font-size: 0.85rem; }
.error {
  background: #f8e8e8;
  color: var(--error);
  border: 1px solid #e2bcbc;
  padding: 0.8rem 1rem;
}

.ok {
  background: #e7f0e4;
  color: #2f5d3a;
  border: 1px solid #b7d0b0;
  padding: 0.8rem 1rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--card);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

th {
  cursor: pointer;
  background: #ebe4d5;
  user-select: none;
}

tr:nth-child(even) td { background: #f7f3ea; }

a { color: var(--accent); }