:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --ink: #1a1a1a;
  --muted: #5b6166;
  --accent: #13343b;
  --line: #e2e4e6;
  --warn-bg: #fff8e1;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--accent);
  color: #fff;
}

.topbar h1 { font-size: 1.15rem; margin: 0; }

.badge {
  font-size: 0.8rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
}

.disclaimer {
  margin: 0;
  padding: 0.75rem 1.25rem;
  background: var(--warn-bg);
  border-bottom: 1px solid var(--line);
  font-size: 0.85rem;
  color: #6b5e16;
}

main { max-width: 880px; margin: 0 auto; padding: 1.25rem; }

fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 0 0 1rem;
  padding: 1rem;
  background: var(--panel);
}

legend { font-weight: 600; padding: 0 0.4rem; }

label {
  display: block;
  margin: 0.5rem 0;
  font-size: 0.9rem;
  color: var(--muted);
}

input, select {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.55rem 0.6rem;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  min-height: 44px;
}

.lines .line {
  display: grid;
  grid-template-columns: 1fr 0.6fr auto;
  gap: 0.5rem;
  align-items: end;
  margin-bottom: 0.5rem;
}

.hint { color: var(--muted); font-size: 0.85rem; margin: 0 0 0.5rem; }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.5rem; }

button {
  font-size: 1rem;
  padding: 0.6rem 1.1rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  min-height: 44px;
}

button.secondary { background: #e9ecef; color: var(--ink); }
button:active { transform: translateY(1px); }

.error {
  background: #fdecea;
  border: 1px solid #f5c6cb;
  color: #842029;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.report {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.report h2 { border-bottom: 1px solid var(--line); padding-bottom: 0.3rem; }
.report table { border-collapse: collapse; width: 100%; margin: 0.5rem 0; }
.report th, .report td { border: 1px solid var(--line); padding: 0.4rem 0.6rem; text-align: left; }
.report .chart { margin: 1rem 0; min-height: 280px; }

@media (max-width: 640px) {
  .lines .line { grid-template-columns: 1fr; }
  .topbar h1 { font-size: 1rem; }
}

/* v0.1.1 — nav backlink, contact form, mobile pass */
.topbar-right { display: flex; align-items: center; gap: 0.75rem; }
.backlink { color: #fff; text-decoration: none; font-size: 0.85rem; opacity: 0.9; }
.backlink:hover { text-decoration: underline; }

.contact {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-top: 1.5rem;
}
.contact textarea {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.55rem 0.6rem;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font-family: inherit;
}
footer.site { text-align: center; color: var(--muted); font-size: 0.8rem; padding: 1.5rem 1rem; }
footer.site a { color: var(--accent); }

@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; gap: 0.5rem; }
  main { padding: 1rem; }
  .actions button { width: 100%; }
}

/* v0.1.2 - help panel + field tooltips */
details.help { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.75rem 1rem; margin: 0 0 1.25rem; }
details.help > summary { cursor: pointer; font-weight: 600; color: var(--accent); }
details.help .help-body { margin-top: 0.75rem; font-size: 0.92rem; }
details.help .help-body h3 { font-size: 0.95rem; margin: 0.9rem 0 0.3rem; }
details.help .help-body ul { margin: 0.3rem 0 0.3rem 1.1rem; }
.tip { display: inline-flex; align-items: center; justify-content: center; width: 1.05rem; height: 1.05rem; margin-left: 0.3rem; border-radius: 50%; background: var(--line); color: var(--accent); font-size: 0.72rem; font-weight: 700; cursor: help; vertical-align: middle; }
.tip:hover { background: var(--accent); color: #fff; }
.docs-link { display: inline-block; margin-top: 0.5rem; }