/* ============================================================================
   SMTR Guided Tools — Shared Stylesheet
   Show Me The Receipts / ProofMode Health
   Dark ProofMode visual system. Mobile-first. Print-ready. WCAG AA.
   ============================================================================ */

:root {
  --bg: #0B0D0E;
  --surface: #111315;
  --surface-2: #1A1D21;
  --surface-3: #23272C;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-focus: #0F8F7A;
  --text: #F7F7F5;
  --text-muted: #A8ADB6;
  --text-faint: #6B7079;
  --primary: #0F8F7A;
  --primary-deep: #0A6E60;
  --primary-hover: #12A88F;
  --primary-glow: rgba(15, 143, 122, 0.10);
  --accent: #B87333;
  --accent-glow: rgba(184, 115, 51, 0.10);
  --danger: #C24A4A;
  --danger-glow: rgba(194, 74, 74, 0.10);
  --success: #4C9A6C;
  --warning: #D19430;

  --font-h: 'Montserrat', system-ui, -apple-system, Segoe UI, Helvetica, Arial, sans-serif;
  --font-b: 'Open Sans', system-ui, -apple-system, Segoe UI, Helvetica, Arial, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.25rem;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 4px 16px rgba(0, 0, 0, 0.35);
}

/* ---------- Reset --------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-b);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip link for keyboard/screen-reader users */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 999;
  border-radius: var(--r-sm);
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- Layout -------------------------------------------------------- */

.tool-shell {
  max-width: 780px;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
}

.tool-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}
.tool-header .eyebrow {
  font-family: var(--font-h);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.75rem;
}
.tool-header h1 {
  font-family: var(--font-h);
  font-size: clamp(1.5rem, 5vw, var(--text-3xl));
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 0.75rem;
  color: var(--text);
}
.tool-header .lede {
  font-size: var(--text-base);
  color: var(--text-muted);
  margin: 0;
  max-width: 60ch;
}

.tool-nav {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  font-family: var(--font-h);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.tool-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.tool-nav a:hover, .tool-nav a:focus-visible {
  color: var(--text);
  border-color: var(--border-strong);
}

/* ---------- Sections ------------------------------------------------------ */

.tool-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}
@media (min-width: 640px) {
  .tool-section { padding: 2rem; }
}
.tool-section h2 {
  font-family: var(--font-h);
  font-size: var(--text-xl);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text);
}
.tool-section .section-hint {
  color: var(--text-muted);
  font-size: var(--text-sm);
  margin: 0 0 1.5rem;
  max-width: 60ch;
}
.tool-section .step-number {
  display: inline-block;
  font-family: var(--font-h);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-right: 0.5rem;
}

/* ---------- Form controls ------------------------------------------------- */

.field {
  display: block;
  margin-bottom: 1.25rem;
}
.field label,
.field .label {
  display: block;
  font-family: var(--font-h);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}
.field .help {
  display: block;
  color: var(--text-muted);
  font-size: var(--text-sm);
  margin-bottom: 0.5rem;
}
.field input[type="text"],
.field input[type="number"],
.field input[type="tel"],
.field textarea,
.field select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 0.75rem 0.9rem;
  border-radius: var(--r-md);
  font-family: var(--font-b);
  font-size: var(--text-base);
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
  -moz-appearance: textfield;
}
.field input[type="number"]::-webkit-outer-spin-button,
.field input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--surface-3);
}
.field textarea {
  min-height: 6rem;
  resize: vertical;
}
.field .prefix-wrap {
  position: relative;
}
.field .prefix-wrap .prefix {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
  font-family: var(--font-h);
  font-size: var(--text-base);
  pointer-events: none;
}
.field .prefix-wrap input { padding-left: 2rem; }

/* Radio and checkbox groups */
.choice-group {
  display: grid;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.choice {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
  user-select: none;
}
.choice:hover { border-color: var(--border-strong); }
.choice input {
  margin: 0.25rem 0 0 0;
  accent-color: var(--primary);
  min-width: 1.1rem;
  min-height: 1.1rem;
}
.choice-content { flex: 1; }
.choice-title {
  font-family: var(--font-h);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.15rem;
}
.choice-body {
  color: var(--text-muted);
  font-size: var(--text-sm);
  margin: 0;
  line-height: 1.5;
}
.choice input:checked ~ .choice-content .choice-title { color: var(--primary); }
.choice:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-glow);
}

/* Number-row grid for parallel inputs */
.number-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
@media (min-width: 560px) {
  .number-grid.cols-2 { grid-template-columns: 1fr 1fr; }
  .number-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
  .number-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Buttons ------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-h);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.85rem 1.25rem;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform 0.1s var(--ease), background 0.15s var(--ease),
              border-color 0.15s var(--ease), color 0.15s var(--ease);
  min-height: 44px;
  min-width: 44px;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover, .btn-primary:focus-visible { background: var(--primary-hover); }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-secondary:hover, .btn-secondary:focus-visible {
  border-color: var(--primary);
  color: var(--primary);
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover, .btn-ghost:focus-visible { color: var(--text); }
.btn-danger {
  background: transparent;
  color: var(--danger);
  border-color: rgba(194, 74, 74, 0.4);
}
.btn-danger:hover, .btn-danger:focus-visible {
  background: var(--danger-glow);
  border-color: var(--danger);
}
.btn-block { width: 100%; }

.btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

/* ---------- Results panel ------------------------------------------------- */

.results-panel {
  background: linear-gradient(180deg, var(--surface-2) 0%, var(--surface) 100%);
  border: 1px solid var(--primary);
  border-radius: var(--r-lg);
  padding: 1.75rem 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-2);
}
@media (min-width: 640px) {
  .results-panel { padding: 2.5rem 2rem; }
}
.results-panel .results-eyebrow {
  font-family: var(--font-h);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  margin: 0 0 0.5rem;
}
.results-panel h2 {
  font-family: var(--font-h);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin: 0 0 1.5rem;
  color: var(--text);
}

.headline-figure {
  font-family: var(--font-h);
  font-size: clamp(2.5rem, 8vw, 3.75rem);
  font-weight: 800;
  line-height: 1;
  color: var(--primary);
  letter-spacing: -0.02em;
  margin: 0.5rem 0;
  font-variant-numeric: tabular-nums;
}
.headline-figure .unit {
  font-size: 0.5em;
  color: var(--text-muted);
  font-weight: 700;
  margin-left: 0.25rem;
  letter-spacing: 0;
}

.result-breakdown {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (min-width: 560px) {
  .result-breakdown.cols-2 { grid-template-columns: 1fr 1fr; }
  .result-breakdown.cols-3 { grid-template-columns: 1fr 1fr; }
  .result-breakdown.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .result-breakdown.cols-5 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 800px) {
  .result-breakdown.cols-3 { grid-template-columns: repeat(3, 1fr); }
  .result-breakdown.cols-4 { grid-template-columns: repeat(4, 1fr); }
  .result-breakdown.cols-5 { grid-template-columns: repeat(5, 1fr); }
}
.result-card {
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1rem;
}
.result-card .rc-label {
  font-family: var(--font-h);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 0.35rem;
}
.result-card .rc-value {
  font-family: var(--font-h);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  margin: 0;
}
.result-card .rc-note {
  font-size: var(--text-xs);
  color: var(--text-faint);
  margin: 0.3rem 0 0;
}

.result-insight {
  background: var(--surface-3);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 1rem 1.25rem;
  margin-top: 1.5rem;
}
.result-insight h3 {
  font-family: var(--font-h);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.5rem;
}
.result-insight p { margin: 0; color: var(--text); font-size: var(--text-sm); }

/* ---------- Notices / disclaimer ----------------------------------------- */

.notice {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.55;
}
.notice-strong {
  border-color: rgba(194, 74, 74, 0.35);
  background: var(--danger-glow);
  color: var(--text);
}
.notice-privacy {
  border-color: rgba(15, 143, 122, 0.35);
  background: var(--primary-glow);
  color: var(--text);
}
.notice p { margin: 0; }
.notice p + p { margin-top: 0.5rem; }
.notice strong { color: var(--text); }

.disclaimer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: var(--text-xs);
  line-height: 1.6;
  max-width: 65ch;
}
.disclaimer p { margin: 0 0 0.5rem; }

/* ---------- Footer -------------------------------------------------------- */

.tool-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: space-between;
  font-family: var(--font-h);
  font-size: var(--text-xs);
  color: var(--text-faint);
  letter-spacing: 0.05em;
}
.tool-footer a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.tool-footer a:hover, .tool-footer a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--primary);
}
.tool-footer .signoff {
  font-style: italic;
  color: var(--text-muted);
}

/* ---------- Helpers ------------------------------------------------------- */

.hidden { display: none !important; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); border: 0;
}
.text-muted { color: var(--text-muted); }
.mono-num { font-variant-numeric: tabular-nums; }

.saved-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-h);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-left: auto;
}
.saved-indicator::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}
.saved-indicator.is-stale::before { background: var(--warning); box-shadow: 0 0 6px var(--warning); }
.saved-indicator.is-off::before { background: var(--text-faint); box-shadow: none; }

/* ---------- Print --------------------------------------------------------- */

@media print {
  :root {
    --bg: #ffffff;
    --surface: #ffffff;
    --surface-2: #ffffff;
    --surface-3: #f7f7f5;
    --border: #cccccc;
    --border-strong: #999999;
    --text: #111111;
    --text-muted: #444444;
    --text-faint: #666666;
    --primary: #0A6E60;
    --accent: #8a5522;
  }
  body { background: #fff; color: #111; font-size: 11pt; }
  .tool-nav, .tool-form, .btn-row, .btn, .no-print { display: none !important; }
  .tool-shell { max-width: 100%; padding: 0; }
  .tool-section, .results-panel {
    background: #fff !important;
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    page-break-inside: avoid;
    padding: 1rem !important;
    margin-bottom: 0.75rem;
  }
  .headline-figure { color: #0A6E60 !important; }
  .result-card { background: #f7f7f5 !important; }
  .disclaimer { color: #444 !important; }
  .print-only { display: block !important; }
  a { color: #0A6E60; text-decoration: none; }
  a::after {
    content: " (" attr(href) ")";
    font-size: 9pt;
    color: #666;
  }
  a[href^="#"]::after, a.no-url-print::after { content: ""; }
  h1, h2, h3 { break-after: avoid; }
}
.print-only { display: none; }

/* ── Verdict states (used across chapters 2, 3, 4, 5) ──────────────── */
.rc-value.is-ok   { color: var(--primary); }
.rc-value.is-warn { color: var(--accent); }
.rc-value.is-stop { color: var(--danger); }
.result-insight.state-ok   { border-left-color: var(--primary); }
.result-insight.state-warn { border-left-color: var(--accent); }
.result-insight.state-stop { border-left-color: var(--danger); }
.result-insight.state-warn h3 { color: var(--accent); }
.result-insight.state-stop h3 { color: var(--danger); }