:root {
  color-scheme: dark;
  --fg: #e6e9ef;
  --muted: #8b94a5;
  --bg: #14161a;
  --bg-soft: #1d2027;
  --bg-elev: #232732;
  --border: #2c313c;
  --primary: #c4a7ff;
  --primary-strong: #b794f6;
  --primary-fg: #14161a;
  --error-bg: #2a1418;
  --error-fg: #f5808d;
  --radius: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.site-header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--fg);
}
.site-header nav a {
  margin-left: 1rem;
  color: var(--muted);
  text-decoration: none;
}
.site-header nav a:hover { color: var(--fg); }

.site-footer {
  text-align: center;
  color: var(--muted);
  padding: 1rem;
  border-top: 1px solid var(--border);
}

h1, h2, h3 { line-height: 1.2; margin-top: 0; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.0rem; color: var(--muted); }

.muted { color: var(--muted); }
.hint { color: var(--muted); font-size: 0.9rem; }

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

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  background: var(--bg-soft);
}
fieldset.card { display: block; }
fieldset.card legend {
  font-weight: 600;
  padding: 0 0.4rem;
}

.intro { margin-bottom: 1rem; }
.intro h1 { margin-bottom: 0.25rem; }

label { display: block; margin: 0.4rem 0; }
label.check { display: flex; align-items: center; gap: 0.4rem; }

input[type="text"], input[type="number"], select {
  width: 100%;
  padding: 0.4rem 0.5rem;
  font: inherit;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
}
input[type="text"]:focus, input[type="number"]:focus, select:focus,
input[type="file"]:focus {
  outline: 2px solid var(--primary);
  outline-offset: -1px;
}

input[type="file"] {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font: inherit;
}
input[type="file"]::file-selector-button {
  font: inherit;
  margin-right: 0.6rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  cursor: pointer;
}
input[type="file"]::file-selector-button:hover {
  background: var(--border);
}

.file-pick { display: block; }
.file-pick > span { font-weight: 500; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.5rem 1rem;
  margin-top: 0.5rem;
}

details {
  border-top: 1px solid var(--border);
  margin-top: 0.5rem;
  padding-top: 0.5rem;
}
details:first-of-type { border-top: 0; padding-top: 0; }
summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.25rem 0;
}

.group-row {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) 2fr 2fr auto;
  gap: 0.5rem;
  align-items: end;
  padding: 0.5rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
}
.group-row .file-pick { margin: 0; }

button, .button {
  display: inline-block;
  font: inherit;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  border-radius: var(--radius);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background 0.12s ease, border-color 0.12s ease;
}
button:hover, .button:hover {
  background: var(--border);
  border-color: var(--primary);
}
button.primary, .button.primary {
  background: var(--primary);
  color: var(--primary-fg);
  border-color: var(--primary);
  font-weight: 600;
}
button.primary:hover, .button.primary:hover {
  background: var(--primary-strong);
  border-color: var(--primary-strong);
}
button.secondary { background: var(--bg-elev); }
button.remove-row { padding: 0.4rem 0.7rem; }

.row-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.submit-row {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1rem;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.header-actions { display: flex; gap: 0.4rem; }

.copy-url {
  display: flex;
  gap: 0.4rem;
  align-items: stretch;
  margin-top: 0.25rem;
  max-width: 38rem;
}
.copy-url input {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
  padding: 0.35rem 0.5rem;
  background: var(--bg-elev);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.copy-url button { padding: 0.35rem 0.7rem; }

.selectors { display: flex; gap: 1rem; margin-bottom: 1rem; }
.selectors label { flex: 0 1 auto; }
.selectors select { min-width: 220px; }

.stats { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }
.stats td { padding: 0.25rem 0.5rem; border-bottom: 1px solid var(--border); }
.stats td:first-child { color: var(--muted); width: 18rem; }

.plot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 1rem;
}

.plot-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}
@media (max-width: 720px) {
  .plot-row { grid-template-columns: 1fr; }
}

.plot-tile.plot-full { margin-bottom: 1rem; }

details.additional-plots {
  border-top: 1px solid var(--border);
  border-bottom: none;
  margin-top: 0.5rem;
  padding-top: 0.75rem;
}
details.additional-plots > summary {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.75rem;
  cursor: pointer;
}
details.additional-plots[open] > summary {
  margin-bottom: 1rem;
}
.plot-tile {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  background: #ffffff;
  color: #1c1f24;
  overflow: hidden;
  min-width: 0;
}
/* The self-contained cmuts report, embedded via <iframe>. */
.report-frame { width: 100%; height: 85vh; border: 1px solid #d9dee6;
                border-radius: 8px; background: #fff; margin: 0.5rem 0 1rem; }

pre.log {
  background: #0b0d12;
  color: #d6e1f0;
  border: 1px solid var(--border);
  padding: 0.75rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.85rem;
  white-space: pre-wrap;
  max-height: 30rem;
}

pre.markdown {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 0.75rem;
  border-radius: var(--radius);
  white-space: pre-wrap;
  color: var(--fg);
}

.error { border-color: var(--error-fg); background: var(--error-bg); }
.error h1 { color: var(--error-fg); }
.error-msg { color: var(--error-fg); font-weight: 600; }

a { color: var(--primary); }
a:hover { color: var(--primary-strong); }

h3 { color: var(--fg); opacity: 0.85; }

.group-row {
  background: var(--bg-elev);
  border-color: var(--border);
}

.stats td { border-color: var(--border); }
.stats td:first-child { color: var(--muted); }

.downloads { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.5rem; }