:root {
  --navy: #1f4e78;
  --navy-dark: #163a5a;
  --accent: #2e8b57;
  --bg: #f6f8fa;
  --card-bg: #ffffff;
  --border: #dfe4ea;
  --text: #1c2733;
  --muted: #5b6b7a;
  --warn-bg: #fff7e6;
  --warn-border: #f0c36d;
  --good: #2e8b57;
  --low: #c0392b;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding-inline: 20px;
}

.site-header {
  background: linear-gradient(135deg, var(--navy), var(--navy-dark));
  color: #fff;
  padding-block: 36px;
}

.site-header h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
}

.tagline {
  margin: 0;
  max-width: 720px;
  color: #dce8f2;
}

.disclaimer-banner {
  background: var(--warn-bg);
  border-bottom: 1px solid var(--warn-border);
}

.disclaimer-banner .wrap {
  padding-block: 10px;
  font-size: 0.88rem;
  color: var(--text);
}

.disclaimer-inline {
  margin: 0 0 14px;
  padding: 10px 14px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--text);
}

main.wrap {
  padding-block: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 24px;
}

.card h2 {
  margin-top: 0;
  font-size: 1.2rem;
  color: var(--navy-dark);
}

.steps ol {
  padding-left: 20px;
  margin-bottom: 18px;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: 6px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: filter 0.15s ease;
}

.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--navy);
  color: #fff;
}

.btn-secondary {
  background: var(--accent);
  color: #fff;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 28px 20px;
  text-align: center;
  margin-bottom: 16px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.dropzone.dragover {
  border-color: var(--navy);
  background: #eef4fa;
}

.dropzone p { margin: 0 0 12px; color: var(--muted); }

.file-name {
  margin-top: 10px !important;
  font-weight: 600;
  color: var(--navy-dark);
}

.status {
  margin-top: 14px;
  font-size: 0.95rem;
}

.status.error { color: var(--low); }
.status.loading { color: var(--muted); }
.status.success { color: var(--good); }

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.warnings-box {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 6px;
  padding: 12px 14px;
  margin: 14px 0;
  font-size: 0.9rem;
}

.warnings-box ul { margin: 6px 0 0; padding-left: 18px; }

.table-scroll { overflow-x: auto; }

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 760px;
}

th, td {
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  font-size: 0.9rem;
  vertical-align: top;
}

th {
  background: #f0f4f8;
  color: var(--navy-dark);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

th span { display: block; font-weight: 400; text-transform: none; letter-spacing: 0; }

.confidence-good { color: var(--good); font-weight: 600; }
.confidence-low { color: var(--low); font-weight: 600; }
.confidence-na { color: var(--muted); }

.row-warnings {
  font-size: 0.82rem;
  color: var(--low);
  margin: 4px 0 0;
  padding-left: 16px;
}

.row-warnings .disagreement-note {
  color: var(--navy);
  font-weight: 600;
}

.details-row td {
  background: #fafcfe;
}

.chart-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--navy);
}

.chart-wrap { padding: 12px 0; }
canvas.fit-chart { max-width: 100%; }

.about dl { margin: 0; }
.about dt { font-weight: 700; margin-top: 14px; color: var(--navy-dark); }
.about dt:first-child { margin-top: 0; }
.about dd { margin: 4px 0 0; color: var(--text); }

.references h3 {
  font-size: 1rem;
  color: var(--navy-dark);
  margin: 20px 0 8px;
}
.references ol, .references ul {
  padding-left: 20px;
  margin: 8px 0;
}
.references li { margin-bottom: 6px; }
.references code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0 4px;
  font-size: 0.9em;
}

.disclaimer {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding-block: 24px;
}
.site-footer a {
  color: var(--navy);
  margin-left: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151b;
    --card-bg: #171e26;
    --border: #2a3441;
    --text: #e7edf3;
    --muted: #9aabb9;
    --warn-bg: #2a2415;
    --warn-border: #6b551f;
  }
  th { background: #1c2530; }
  .details-row td { background: #131a21; }
  .tagline { color: #c7d8e6; }
}