:root {
  --bg: #F4F5F9;
  --surface: #FFFFFF;
  --surface-2: #F0F1F6;
  --border: #E2E4EC;
  --border-strong: #8A90A2;
  --text: #16171D;
  --text-muted: #5A5F6E;
  --accent: #4F46E5;
  --accent-hover: #4338CA;
  --accent-2: #7C3AED;
  --accent-soft: #EEF0FF;
  --accent-text: #4338CA;
  --on-accent: #FFFFFF;
  --focus: #4F46E5;
  --good: #15803D; --on-good: #FFFFFF; --good-tint: #ECFDF3; --good-text: #166534;
  --mid: #B45309; --on-mid: #FFFFFF; --mid-tint: #FFF7E6; --mid-text: #92400E;
  --weak: #475569; --on-weak: #FFFFFF; --weak-tint: #F1F3F7; --weak-text: #475569;
  --fatal: #B91C1C; --on-fatal: #FFFFFF; --fatal-soft: #FEECEC; --fatal-text: #991B1B;

  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 20px; --s-6: 24px;
  --r-sm: 6px; --r-md: 10px; --r-pill: 999px;
  --shadow-card: 0 1px 2px rgba(20,22,40,.06), 0 1px 1px rgba(20,22,40,.04);
  --shadow-footer: 0 -6px 16px rgba(20,22,40,.06);
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --fs-xs: 11px; --fs-sm: 12px; --fs-base: 13px; --fs-md: 14px; --fs-hero: 44px;
  --dur: 120ms; --ease: cubic-bezier(.2,.7,.3,1);
  --shadow-pop: 0 6px 16px rgba(20,22,40,.14);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0F1016;
    --surface: #181A23;
    --surface-2: #20232F;
    --border: #2C3040;
    --border-strong: #6B7186;
    --text: #ECEDF3;
    --text-muted: #A0A5B8;
    --accent: #5B54E8;
    --accent-hover: #6C66F0;
    --accent-2: #8B5CF6;
    --accent-soft: #23234A;
    --accent-text: #A5A1FF;
    --on-accent: #FFFFFF;
    --focus: #8B85FF;
    --good: #4ADE80; --on-good: #052E16; --good-tint: rgba(74,222,128,.12); --good-text: #86EFAC;
    --mid: #FBBF24; --on-mid: #1F1300; --mid-tint: rgba(251,191,36,.12); --mid-text: #FCD34D;
    --weak: #94A3B8; --on-weak: #0F172A; --weak-tint: rgba(148,163,184,.10); --weak-text: #CBD5E1;
    --fatal: #F87171; --on-fatal: #2A0606; --fatal-soft: #2A1519; --fatal-text: #FCA5A5;

    --shadow-card: none;
    --shadow-footer: 0 -6px 16px rgba(0,0,0,.35);
    --shadow-pop: 0 6px 16px rgba(0,0,0,.5);
  }
}

@media (prefers-reduced-motion: reduce) {
  :root { --dur: 0ms; }
  .ns-seg.is-on { transition: none; }
  #score-onboarding:not([hidden]),
  #score-empty:not([hidden]),
  #score-not-enough:not([hidden]),
  #score-result:not([hidden]) { animation: none; }
}

* { box-sizing: border-box; }

html, body {
  width: 380px;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.45 var(--font);
}

[hidden] { display: none !important; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.ns-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.ns-brand { display: flex; gap: 8px; align-items: center; }
.ns-header-actions { display: flex; gap: 6px; align-items: center; }
.is-embedded .ns-header { display: none; }
.ns-mark {
  width: 24px; height: 24px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #FFF;
  display: grid;
  place-items: center;
  box-shadow: 0 2px 6px rgba(79,70,229,.35);
}
.ns-title { font: 600 14px var(--font); letter-spacing: -0.01em; margin: 0; }
.ns-chip {
  font: 500 11px var(--font);
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 2px 8px;
}

/* Error banner */
.ns-banner {
  margin: 12px 12px 0;
  display: flex;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  background: var(--fatal-soft);
  color: var(--fatal-text);
  font-size: 12.5px;
}
.ns-banner p { margin: 0; flex: 1; }
.ns-icon-btn {
  width: 24px; height: 24px;
  background: transparent;
  border: 0;
  border-radius: var(--r-sm);
  color: inherit;
  cursor: pointer;
  flex: none;
}
.ns-icon-btn:hover { background: color-mix(in srgb, var(--fatal) 12%, transparent); }

/* Main / cards */
.ns-main { padding: 12px; display: flex; flex-direction: column; gap: 12px; }
.ns-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-card);
}
.ns-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 24px;
  margin-bottom: 8px;
}
.ns-card-head .ns-eyebrow { margin: 0; }
.ns-eyebrow {
  font: 600 11px var(--font);
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin: 0 0 8px;
}
.ns-session-active { margin: 0 0 10px; }
.ns-session-active strong {
  color: var(--accent-text);
  display: inline-block;
  vertical-align: bottom;
  max-width: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ns-muted { color: var(--text-muted); }

.ns-label { display: block; font: 500 12px var(--font); margin-bottom: 4px; }
.ns-input {
  width: 100%;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
}
.ns-input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}

.ns-btn-row { display: flex; gap: 8px; margin-top: 8px; }
.ns-btn-row #start-btn { flex: 1; }
.ns-btn-row #open-etsy-btn { flex: none; }
.ns-btn-row-end { justify-content: flex-end; }

.ns-confirm {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  background: var(--fatal-soft);
  border: 1px solid color-mix(in srgb, var(--fatal) 35%, transparent);
}
.ns-confirm p { margin: 0; font-size: 12.5px; }

.ns-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.ns-crit.is-unreliable { opacity: .45; }
.ns-next { margin-top: 10px; }
.ns-next .btn { width: 100%; }
.ns-stat {
  margin: 0;
  display: flex;
  flex-direction: column-reverse;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  background: var(--surface-2);
}
.ns-stat-value { font: 700 20px var(--font); font-variant-numeric: tabular-nums; line-height: 1.1; }
.ns-stat-label { font-size: 12px; color: var(--text-muted); }
#complete-count-line.is-ready .ns-stat-value { color: var(--good-text); }

.ns-details { margin-top: 10px; }
.ns-details summary {
  cursor: pointer;
  font: 600 12px var(--font);
  color: var(--text-muted);
  list-style: none;
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 4px 0;
}
.ns-details summary:hover { color: var(--text); }
.ns-details summary::-webkit-details-marker { display: none; }
.ns-details summary::before {
  content: '';
  width: 6px; height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  transition: transform var(--dur) var(--ease);
}
.ns-details[open] summary::before { transform: rotate(45deg); }

.ns-inc-list { list-style: none; margin: 6px 0 0; padding: 0; }
.ns-inc {
  padding: 8px 0;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
}
.ns-inc-name {
  grid-column: 1 / -1;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font: 500 12.5px var(--font);
}
.ns-inc-name.is-unnamed { font-style: italic; }
.ns-inc-shop {
  font-size: 12px;
  color: var(--text-muted);
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 140px;
}
.ns-inc-missing {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}
.ns-miss {
  font: 500 11px var(--font);
  padding: 1px 6px;
  border-radius: var(--r-pill);
  background: var(--mid-tint);
  color: var(--mid-text);
}

/* Score card */
.ns-score[data-state="scored"] { background: linear-gradient(180deg, var(--v-tint) 0, var(--surface) 96px); }
.ns-score[data-verdict="good"] { --v-solid: var(--good); --v-on: var(--on-good); --v-tint: var(--good-tint); }
.ns-score[data-verdict="mid"] { --v-solid: var(--mid); --v-on: var(--on-mid); --v-tint: var(--mid-tint); }
.ns-score[data-verdict="weak"] { --v-solid: var(--weak); --v-on: var(--on-weak); --v-tint: var(--weak-tint); }
.ns-score[data-verdict="fatal"] { --v-solid: var(--fatal); --v-on: var(--on-fatal); --v-tint: var(--fatal-soft); }
.ns-score[data-verdict="fatal"] { border: 1.5px solid var(--fatal); }

.ns-score-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 2px 0 10px;
}
.ns-total {
  margin: 0;
  font: 700 44px var(--font);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.ns-total-max { font: 600 18px var(--font); color: var(--text-muted); margin-left: 2px; }
[data-verdict="fatal"] #score-total { color: var(--fatal-text); }

.ns-badge {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  height: 26px;
  padding: 0 10px;
  border-radius: var(--r-pill);
  font: 700 12px var(--font);
  letter-spacing: .04em;
  background: var(--v-solid);
  color: var(--v-on);
}
.ns-score[data-verdict="good"] .ns-badge-icon::before { content: '✓'; }
.ns-score[data-verdict="mid"] .ns-badge-icon::before { content: '◐'; }
.ns-score[data-verdict="weak"] .ns-badge-icon::before { content: '▾'; }
.ns-score[data-verdict="fatal"] .ns-badge-icon::before { content: '✕'; }

.ns-meter {
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  gap: 3px;
  height: 6px;
}
.ns-seg { border-radius: 2px; background: var(--surface-2); border: 1px solid var(--border); }
.ns-seg.is-on {
  background: var(--v-solid);
  border-color: transparent;
  transition: background-color 200ms var(--ease);
  transition-delay: calc(var(--i) * 20ms);
}
.ns-meter-idle .ns-seg { border-style: dashed; }

.ns-fatal-note {
  margin: 10px 0 0;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  background: var(--fatal-soft);
  border-left: 3px solid var(--fatal);
  color: var(--fatal-text);
  font: 600 12.5px var(--font);
}

.ns-criteria { width: 100%; border-collapse: collapse; margin-top: 12px; }
.ns-criteria th, .ns-criteria td {
  padding: 8px 0;
  border-top: 1px solid var(--border);
  vertical-align: middle;
  text-align: left;
  font-weight: 400;
}
.ns-criteria .ns-crit-label { padding-right: 8px; }
.ns-crit-label { font-size: 12.5px; }
.ns-crit-head { display: flex; align-items: center; gap: 4px; min-width: 0; }
.ns-crit-name { min-width: 0; }
.ns-crit-sub {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 170px;
}
.ns-crit-value {
  font: 600 12.5px var(--font);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.ns-criteria .ns-crit-value { text-align: right; font-weight: 600; padding-right: 12px; }
.ns-crit-value.is-good { color: var(--good-text); }
.ns-crit-value.is-mid  { color: var(--mid-text); }
.ns-crit-value.is-bad  { color: var(--fatal-text); }
.ns-crit-value::before {
  content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  margin-right: 6px; vertical-align: middle; background: currentColor;
}

/* shared ⓘ (popup + compare) */
.ns-info {
  flex: none; position: relative;
  width: 18px; height: 18px; padding: 0;
  display: inline-grid; place-items: center;
  border: 1.5px solid var(--border-strong); border-radius: 50%;
  background: transparent; color: var(--text-muted);
  font: italic 700 11px/1 Georgia, 'Times New Roman', serif;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.ns-info::after { content: ''; position: absolute; inset: -4px; }
.ns-info:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-text); }
.ns-info[aria-expanded="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.ns-info:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
@media (pointer: coarse) { .ns-info::after { inset: -10px; } }

/* explain row */
.ns-criteria .ns-crit-explain td { border-top: 0; padding: 0 0 10px; }
.ns-explain {
  padding: 8px 10px; border-radius: var(--r-sm);
  background: var(--surface-2); box-shadow: inset 2px 0 0 var(--accent);
  animation: ns-fade 160ms var(--ease);
}
.ns-explain-text { margin: 0; font-size: 12px; line-height: 1.5; color: var(--text); }
tr.ns-crit-explain[data-fatal="true"] td { box-shadow: inset 3px 0 0 var(--fatal); padding-right: 8px; }
tr.ns-crit-explain[data-fatal="true"] .ns-explain { background: var(--surface); box-shadow: none; }

/* shared threshold chips (popup + compare) */
.ns-thresholds { display: flex; flex-wrap: wrap; gap: 4px; margin: 6px 0 0; }
.ns-th-chip { font: 600 11px/18px var(--font); padding: 0 6px; border-radius: var(--r-pill); white-space: nowrap; }
.ns-th-chip.is-good { background: var(--good-tint); color: var(--good-text); }
.ns-th-chip.is-mid  { background: var(--mid-tint);  color: var(--mid-text); }
.ns-th-chip.is-bad  { background: var(--fatal-soft); color: var(--fatal-text); }
@media (prefers-reduced-motion: reduce) { .ns-explain, .ns-explain-panel, .ns-del-confirm { animation: none; } }
.ns-crit-points { white-space: nowrap; width: 1%; }
.ns-criteria .ns-crit-points { text-align: right; }
.ns-pips { display: inline-flex; gap: 3px; margin-right: 6px; vertical-align: middle; }
.ns-pip { width: 6px; height: 6px; border-radius: 50%; border: 1px solid var(--border-strong); display: inline-block; }
.ns-pip.is-on { background: var(--accent); border-color: var(--accent); }
.ns-pts { font: 600 12px var(--font); font-variant-numeric: tabular-nums; color: var(--text-muted); display: inline-block; min-width: 24px; }
.ns-crit-points.is-zero .ns-pts { color: var(--text); }

tr[data-fatal="true"] { background: var(--fatal-soft); }
tr[data-fatal="true"] th { box-shadow: inset 3px 0 0 var(--fatal); }
tr[data-fatal="true"] th, tr[data-fatal="true"] td { padding-left: 8px; }
tr[data-fatal="true"] .ns-pip.is-on { background: var(--fatal); border-color: var(--fatal); }
tr[data-fatal="true"] .ns-crit-name { font-weight: 600; color: var(--fatal-text); }

.ns-fatal-tag {
  font: 700 10px var(--font);
  letter-spacing: .04em;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--fatal);
  color: var(--on-fatal);
  margin-right: 4px;
}

#score-basis { margin: 8px 0 0; }

.ns-save-row { margin-top: 12px; }
.ns-save-btn { width: 100%; }

.ns-steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ns-steps li {
  counter-increment: step;
  display: block;
  position: relative;
  padding-left: 30px;
  min-height: 20px;
  font-size: 12.5px;
}
.ns-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: -1px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-text);
  font: 700 11px var(--font);
  display: grid;
  place-items: center;
}

.ns-threshold { display: flex; gap: 6px; margin: 4px 0 10px; }
.ns-threshold .ns-pip { width: 10px; height: 10px; }
.ns-threshold .ns-pip.is-on { background: var(--accent); border-color: var(--accent); }

.ns-lead { font: 500 13px var(--font); margin: 0 0 4px; }
.ns-hint { font-size: 12px; color: var(--text-muted); margin: 4px 0 0; }
.ns-hint.is-warn { color: var(--mid-text); }

.ns-footnote {
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  margin: 0;
  padding: 0 16px 4px;
}

.ns-actions {
  position: sticky;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: var(--shadow-footer);
}
.ns-actions .btn { padding: 0 10px; }
#compare-btn { margin-left: auto; }

.ns-action-status {
  font: 500 12px var(--font); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.ns-actions .ns-action-status {
  position: absolute; right: 16px; bottom: calc(100% + 8px);
  max-width: calc(100% - 32px);
  padding: 4px 10px; border-radius: var(--r-pill);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-pop);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.ns-actions .ns-action-status:empty { opacity: 0; transform: translateY(4px); }
.ns-action-status.is-ok { color: var(--good-text); }
.ns-action-status.is-err { color: var(--fatal-text); }
#clear-btn { margin-right: -10px; }

.btn-soft {
  background: var(--accent-soft); color: var(--accent-text);
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
}
.btn-soft:not(:disabled):hover { background: color-mix(in srgb, var(--accent) 18%, var(--surface)); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--r-sm);
  font: 600 13px var(--font);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn-sm { height: 26px; padding: 0 10px; font-size: 12px; }
.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 2px rgba(79,70,229,.3);
}
.btn-primary:not(:disabled):hover { background: var(--accent-hover); }
.btn-secondary { background: var(--surface); border-color: var(--border-strong); color: var(--text); }
.btn-secondary:not(:disabled):hover { background: var(--surface-2); }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:not(:disabled):hover { background: var(--surface-2); color: var(--text); }
.btn-danger { background: var(--fatal); color: var(--on-fatal); }
.btn-danger:not(:disabled):hover { filter: brightness(1.08); }
.btn-danger-ghost { background: transparent; color: var(--fatal-text); }
.btn-danger-ghost:not(:disabled):hover { background: var(--fatal-soft); }
.btn-link {
  background: none;
  border: 0;
  padding: 0;
  color: var(--accent-text);
  font: 600 12px var(--font);
  cursor: pointer;
}
.btn-link:hover { text-decoration: underline; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn-primary:active:not(:disabled) { box-shadow: none; }

.btn:focus-visible, .ns-details summary:focus-visible, .btn-link:focus-visible, .ns-icon-btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.ns-confirm .btn:focus-visible { outline-color: var(--fatal); }

@media (pointer: coarse) {
  .btn { height: 40px; }
  .btn-sm { height: 36px; }
}

@keyframes ns-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}
#score-onboarding:not([hidden]),
#score-empty:not([hidden]),
#score-not-enough:not([hidden]),
#score-result:not([hidden]) {
  animation: ns-fade 160ms var(--ease);
}