/* Design system — single source for spacing, colour, typography. */
:root {
  --bg:          #f7f8fa;
  --surface:     #ffffff;
  --surface-2:  #f1f3f6;
  --border:      #e2e5ea;
  --border-2:    #d0d7de;
  --text:        #1f2328;
  --text-muted:  #5b636e;
  --text-dim:    #8a929c;
  --accent:      #1f6feb;
  --accent-soft: #ddf4ff;
  --accent-hover:#0850c4;
  --ok:          #1a7f37;
  --ok-soft:     #dafbe1;
  --warn:        #9a6700;
  --warn-soft:   #fff8c5;
  --danger:      #cf222e;
  --danger-soft: #ffebe9;
  --radius-sm:   4px;
  --radius:      6px;
  --radius-lg:   10px;
  --shadow-sm:   0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow:      0 2px 8px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  font-family: ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
}

h1, h2, h3, h4 { color: var(--text); font-weight: 600; letter-spacing: -0.01em; }
h2 { font-size: 22px; margin: 0 0 16px; }
h3 { font-size: 17px; margin: 0 0 8px; }

button {
  font-family: inherit;
  border-radius: var(--radius-sm);
  transition: background 120ms ease, border-color 120ms ease, transform 80ms ease;
}
button:hover { transform: translateY(-1px); }
button:active { transform: translateY(0); }
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Dash dropdown polish */
.Select-control, .Select-menu-outer {
  border-color: var(--border-2) !important;
  border-radius: var(--radius-sm) !important;
}
.Select-control:hover { border-color: var(--accent) !important; }

/* Input focus ring */
input[type="text"], input[type="number"], textarea {
  border-radius: var(--radius-sm);
  transition: border-color 120ms ease;
}
input[type="text"]:focus, input[type="number"]:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* DataTable polish */
.dash-table-container .dash-spreadsheet-container .dash-spreadsheet-inner table {
  font-size: 13px;
}

/* Details / disclosures */
details > summary { list-style: none; cursor: pointer; }
details > summary::-webkit-details-marker { display: none; }
details > summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  transition: transform 120ms ease;
  color: var(--text-muted);
}
details[open] > summary::before { transform: rotate(90deg); }

/* Stepper */
.stepper { display: flex; gap: 4px; align-items: center; }
.stepper .step {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-muted);
  transition: background 120ms ease, color 120ms ease;
}
.stepper .step:hover { background: var(--surface-2); }
.stepper .step.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.stepper .step.disabled { color: var(--text-dim); pointer-events: none; }
.stepper .step .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--surface-2); color: var(--text-muted);
  font-size: 11px; font-weight: 600;
}
.stepper .step.active .num { background: var(--accent); color: #fff; }
.stepper .step.done .num { background: var(--ok); color: #fff; }
.stepper .sep {
  width: 16px; height: 1px; background: var(--border);
}

/* Sidebar */
.report-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 16px;
  align-items: start;
}
.feature-sidebar {
  position: sticky;
  top: 76px;
  max-height: calc(100vh - 96px);
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  font-size: 13px;
}
.feature-sidebar a {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 8px;
  color: var(--text);
  border-radius: var(--radius-sm);
  text-decoration: none;
}
.feature-sidebar a:hover { background: var(--surface-2); text-decoration: none; }
.feature-sidebar .dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.feature-sidebar .dot.green  { background: var(--ok); }
.feature-sidebar .dot.yellow { background: var(--warn); }
.feature-sidebar .dot.red    { background: var(--danger); }

@media (max-width: 900px) {
  .report-shell { grid-template-columns: 1fr; }
  .feature-sidebar { position: static; max-height: none; }
}

/* Card severity emphasis */
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 160ms ease;
  scroll-margin-top: 80px;
}
.feature-card:hover { box-shadow: var(--shadow); }
.feature-card.green  { border-left-color: var(--border-2); }
.feature-card.yellow { border-left-color: var(--warn); }
.feature-card.red    { border-left-color: var(--danger); }

.severity-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-right: 10px;
  vertical-align: middle;
}
.severity-pill.green  { background: var(--ok-soft);     color: var(--ok); }
.severity-pill.yellow { background: var(--warn-soft);   color: var(--warn); }
.severity-pill.red    { background: var(--danger-soft); color: var(--danger); }

/* Chips */
.chip {
  display: inline-block;
  background: var(--surface-2);
  padding: 3px 10px;
  border-radius: 999px;
  margin-right: 6px;
  margin-bottom: 4px;
  font-size: 12px;
  color: var(--text-muted);
}
.chip.warn   { background: var(--warn-soft);   color: var(--warn); }
.chip.danger { background: var(--danger-soft); color: var(--danger); }

/* Verdict line */
.verdict {
  margin: 6px 0 12px;
  font-size: 13px;
  color: var(--text-muted);
}