/* ==========================================================================
   DinkLab — stylesheet

   One file, no preprocessor. Everything themeable lives in `:root`, so the
   palette can be swapped without touching a rule.

   Two structural rules are load-bearing and easy to undo by accident:

   1. Every multi-column grid uses `minmax(0, 1fr)`, never a bare `1fr`.
      A bare `1fr` is `minmax(auto, 1fr)`, and grid children default to
      `min-width: auto`, so a wide table or an unbreakable string pushes the
      track past the viewport and the whole page scrolls sideways. The cards
      also carry `min-width: 0` for the same reason.

   2. Text may wrap; numbers may not. A column of figures that breaks between
      `4` and `.25` is worse than a column that is a little wide.
   ========================================================================== */

:root {
  /* surfaces */
  --bg: #f5f7f6;
  --bg-tint: #eef2f0;
  --surface: #ffffff;
  --surface-2: #f3f6f5;
  --border: #dfe6e3;
  --border-strong: #c9d5d0;

  /* text */
  --text: #0f1f18;
  --text-soft: #4e5f57;
  --text-mute: #5d6f67;

  /* brand */
  --primary: #147a4d;
  --primary-strong: #0e5c3a; /* hover: darker, because this is a light theme */
  --primary-soft: #e6f2ec;
  --accent: #d35a0d;
  --accent-ink: #8f3c07;
  --accent-soft: #fdeee3;

  /* court drawing */
  --court-line: #2b3f37;
  --court-kitchen: rgba(20, 122, 77, 0.1);
  --court-net: #0f1f18;

  /* type */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial,
    sans-serif;
  --font-head: 'Barlow', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Consolas, 'Liberation Mono',
    monospace;

  /* geometry */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --wrap: 1120px;
  --gutter: 24px;

  /* elevation — never pure black: a neutral shadow on a green-grey page
     reads as dirty smudge rather than depth */
  --shadow-sm: 0 1px 2px rgba(15, 31, 24, 0.05), 0 2px 8px rgba(15, 31, 24, 0.04);
  --shadow-md: 0 2px 4px rgba(15, 31, 24, 0.05), 0 10px 28px rgba(15, 31, 24, 0.07);

  /* native controls (select, date, scrollbar) follow this */
  color-scheme: light;
}

/* ---------- reset ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary-strong);
  text-decoration: underline;
  text-underline-offset: 2px;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
}

/* Tabular figures everywhere a number is compared down a column. Without
   this the temperature-style values jitter as digits change width. */
.tnum,
table.data .num,
.result-value,
.meter-value,
.spec dd {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum' 1;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--surface);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 0 0 var(--r-md) 0;
  box-shadow: var(--shadow-md);
}

.skip-link:focus {
  left: 0;
}

.icon {
  width: 20px;
  height: 20px;
  flex: none;
}

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- layout ---------- */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

main {
  display: block;
  padding: 28px 0 72px;
  min-height: 60vh;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.02em;
  min-width: 0;
}

.brand:hover {
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  flex: none;
}

.brand-mark .icon {
  width: 19px;
  height: 19px;
}

.brand-name {
  white-space: nowrap;
}

.nav {
  margin-left: auto;
}

.nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
}

.nav-link:hover {
  background: var(--surface-2);
  color: var(--text);
  text-decoration: none;
}

.nav-link.is-current {
  background: var(--primary-soft);
  color: var(--primary-strong);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  place-items: center;
}

.nav-toggle-close {
  display: none;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-open {
  display: none;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-close {
  display: grid;
}

/* ---------- breadcrumb ---------- */

.breadcrumb {
  margin-bottom: 18px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-mute);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: '/';
  color: var(--border-strong);
}

.breadcrumb a {
  color: var(--text-soft);
}

.breadcrumb [aria-current='page'] {
  color: var(--text-mute);
}

/* ---------- page head ---------- */

.page-head {
  margin-bottom: 28px;
  max-width: 720px;
}

.page-head h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin-bottom: 10px;
}

.page-lead {
  color: var(--text-soft);
  font-size: 17px;
  line-height: 1.55;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn .icon {
  width: 17px;
  height: 17px;
}

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

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

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-ghost:hover {
  background: var(--surface-2);
  color: var(--text);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1200px 420px at 12% -10%, rgba(20, 122, 77, 0.13), transparent 62%),
    radial-gradient(900px 380px at 92% 0%, rgba(211, 90, 13, 0.1), transparent 60%),
    var(--surface);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 64px var(--gutter) 56px;
}

.hero-kicker {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero-title {
  font-size: clamp(34px, 5.2vw, 58px);
  max-width: 15ch;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero-sub {
  max-width: 56ch;
  color: var(--text-soft);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.55;
  margin-bottom: 26px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  color: var(--text-mute);
  font-size: 14px;
}

.hero-facts li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.hero-facts .icon {
  width: 16px;
  height: 16px;
  color: var(--primary);
}

/* ---------- sections ---------- */

.section {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px var(--gutter) 0;
}

.section-tint {
  max-width: none;
  margin-top: 56px;
  padding: 56px 0 60px;
  background: var(--bg-tint);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* the tinted band spans full width, so its contents get their own wrapper */
.section-tint > * {
  max-width: var(--wrap);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* The heading box must span the full wrap so its left edge lines up with the
   cards. `.section-tint > *` centres its children, so a 640px head inside it
   ended up centred while the grid below stayed left-aligned. The paragraph is
   what needs the measure, not the box. */
.section-head {
  margin-bottom: 26px;
  max-width: none;
}

.section-head h2 {
  font-size: clamp(23px, 2.6vw, 31px);
  margin-bottom: 8px;
}

.section-head p {
  max-width: 640px;
  color: var(--text-soft);
  font-size: 16px;
}

.section-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
}

.section-more .icon {
  width: 15px;
  height: 15px;
}

/* ---------- tool grid ---------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.tool-card {
  min-width: 0;
}

.tool-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  color: var(--text);
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}

.tool-card-link:hover {
  text-decoration: none;
  color: var(--text);
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.tool-card-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  margin-bottom: 16px;
}

.tool-card-icon .icon {
  width: 23px;
  height: 23px;
}

.tool-card-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.tool-card-blurb {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
  margin-bottom: 14px;
}

/* The example line is the evidence that this card leads to something that
   actually computes, so it must never be truncated. */
.tool-card-example {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  color: var(--text-mute);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  overflow-wrap: anywhere;
  white-space: normal;
}

.tool-card-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  color: var(--primary-strong);
  font-size: 14px;
  font-weight: 600;
}

.tool-card-more .icon {
  width: 15px;
  height: 15px;
  transition: transform 0.16s ease;
}

.tool-card-link:hover .tool-card-more .icon {
  transform: translateX(3px);
}

/* ---------- audience ---------- */

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.audience-card {
  min-width: 0;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}

.audience-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  margin-bottom: 14px;
}

.audience-icon .icon {
  width: 20px;
  height: 20px;
}

.audience-card h3 {
  font-size: 16.5px;
  margin-bottom: 7px;
}

.audience-card p {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
  margin-bottom: 14px;
}

.audience-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
}

.audience-link .icon {
  width: 15px;
  height: 15px;
}

/* ---------- post grid ---------- */

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.post-card {
  min-width: 0;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}

.post-card-meta {
  color: var(--text-mute);
  font-size: 12.5px;
  margin-bottom: 9px;
}

.post-card h3 {
  font-size: 17px;
  line-height: 1.3;
  margin-bottom: 9px;
}

.post-card p {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

/* ---------- faq preview ---------- */

.faq-preview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 28px;
}

.faq-preview-item {
  min-width: 0;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.faq-preview-item h3 {
  font-size: 16px;
  line-height: 1.35;
  margin-bottom: 6px;
}

.faq-preview-item p {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

/* ---------- panels ---------- */

.panel {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}

.panel-head {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
}

.panel-head h2 {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
}

/* ---------- tool layout ---------- */

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.tool-form {
  padding: 0 0 8px;
}

.tool-form .panel-head {
  border-bottom: 1px solid var(--border);
}

.tool-form .field {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
}

.form-aside {
  margin: 0 22px 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  color: var(--text-mute);
  font-size: 13.5px;
  line-height: 1.6;
}

.tool-form .field:last-of-type {
  border-bottom: 0;
}

.field-label {
  display: block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 14.5px;
  margin-bottom: 10px;
}

.field-hint {
  margin-top: 9px;
  color: var(--text-mute);
  font-size: 12.5px;
  line-height: 1.5;
}

/* Inputs. The `:not()` chain is deliberate: a blanket `.field input` rule
   stretches checkboxes and radios to full width and there is no DOM-level
   symptom — it only shows up in a screenshot. */
.field input:not([type='checkbox']):not([type='radio']):not([type='hidden']),
.field select {
  width: 100%;
  padding: 11px 13px;
  font-family: var(--font);
  font-size: 15px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  transition: border-color 0.14s ease, box-shadow 0.14s ease;
}

.field input:not([type='checkbox']):not([type='radio']):not([type='hidden']):hover,
.field select:hover {
  border-color: var(--text-mute);
}

.field input:not([type='checkbox']):not([type='radio']):not([type='hidden']):focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.segmented {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.segmented button {
  flex: 1 1 0;
  min-width: 0;
  padding: 8px 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-soft);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.3;
  cursor: pointer;
  transition: background-color 0.14s ease, color 0.14s ease;
}

.segmented button:hover {
  color: var(--text);
}

.segmented button.is-on {
  background: var(--surface);
  color: var(--primary-strong);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* ---------- result panel ---------- */

.tool-result {
  position: sticky;
  top: 84px;
}

.result-body {
  padding: 22px;
}

.result-hero {
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.result-label {
  color: var(--text-mute);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.result-value {
  font-family: var(--font-head);
  font-size: clamp(34px, 4.6vw, 50px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--primary-strong);
}

.result-unit {
  font-size: 0.42em;
  font-weight: 600;
  color: var(--text-mute);
  margin-left: 8px;
  letter-spacing: 0;
}

.result-sub {
  margin-top: 8px;
  color: var(--text-soft);
  font-size: 14.5px;
}

.result-note {
  margin-top: 14px;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.6;
}

.result-note.is-quiet {
  color: var(--text-mute);
  font-size: 13px;
}

.result-note.is-warn {
  color: var(--accent-ink);
  font-weight: 500;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr));
  gap: 1px;
  margin: 0;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
}

.spec {
  padding: 13px 15px;
  background: var(--surface);
  min-width: 0;
}

.spec dt {
  color: var(--text-mute);
  font-size: 12px;
  margin-bottom: 3px;
}

.spec dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 15px;
  overflow-wrap: anywhere;
}

.callout {
  display: flex;
  gap: 11px;
  margin-top: 16px;
  padding: 14px 16px;
  background: var(--primary-soft);
  border-radius: var(--r-md);
  color: var(--text);
  font-size: 14px;
  line-height: 1.55;
}

.callout .icon {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  color: var(--primary-strong);
}

.rule-lines {
  display: grid;
  gap: 9px;
  margin-bottom: 16px;
}

.rule-lines li {
  position: relative;
  padding-left: 18px;
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

.rule-lines li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.badge {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-warn {
  background: var(--surface-2);
  color: var(--text-soft);
}

.badge-hot {
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.result-block {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.result-block-title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: 10px;
}

.skip-list {
  display: grid;
  gap: 10px;
}

.skip-list li {
  color: var(--text-soft);
  font-size: 13.5px;
  line-height: 1.55;
}

.skip-list strong {
  color: var(--text);
}

/* ---------- meters ---------- */

.meter-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.meter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 84px 38px;
  align-items: center;
  gap: 10px;
}

.meter-label {
  font-size: 13px;
  color: var(--text-soft);
  overflow-wrap: anywhere;
}

.meter-track {
  display: block;
  height: 7px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}

.meter-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
}

.meter-value {
  font-size: 12.5px;
  color: var(--text-mute);
  text-align: right;
  white-space: nowrap;
}

/* ---------- court figure ---------- */

.court-figure {
  margin: 20px 0 0;
}

.court-figure svg {
  width: 100%;
  height: auto;
  overflow: visible;
}

.court-line {
  fill: none;
  stroke: var(--court-line);
  stroke-width: 1.6;
}

.court-kitchen {
  fill: var(--court-kitchen);
  stroke: none;
}

.court-net {
  stroke: var(--court-net);
  stroke-width: 3.4;
  stroke-linecap: round;
}

.court-dim {
  stroke: var(--text-mute);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}

.court-label {
  fill: var(--text-soft);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
}

.court-label-strong {
  fill: var(--primary-strong);
  font-size: 14px;
}

.court-label-sm {
  font-size: 11px;
  font-weight: 500;
  fill: var(--text-mute);
}

.court-figure figcaption {
  margin-top: 10px;
  color: var(--text-mute);
  font-size: 12.5px;
  line-height: 1.5;
}

/* ---------- tables ---------- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  margin-top: 16px;
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

table.data caption {
  text-align: left;
}

table.data th,
table.data td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.data thead th {
  background: var(--surface-2);
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-mute);
  white-space: nowrap;
}

table.data tbody tr:last-child th,
table.data tbody tr:last-child td {
  border-bottom: 0;
}

table.data tfoot th,
table.data tfoot td {
  border-top: 1px solid var(--border-strong);
  border-bottom: 0;
  background: var(--surface-2);
  font-family: var(--font-head);
  font-weight: 700;
}

/* Numbers right-aligned and unbreakable; text wraps freely. */
table.data .num {
  text-align: right;
  white-space: nowrap;
}

.gear-table th[scope='row'] {
  font-weight: 500;
  color: var(--text);
}

/* ---------- next step ---------- */

.next-step {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin-top: 24px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}

.next-step-label {
  color: var(--text-mute);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.next-step-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 15px;
}

.next-step-link .icon {
  width: 16px;
  height: 16px;
}

/* ---------- article ---------- */

/* One centred column, not a left-aligned one. At 760px the article sat
   against the left edge of a 1080px wrap and the empty right-hand side read
   as a broken layout rather than as margin. */
.article {
  max-width: 640px;
  margin-inline: auto;
}

.article-narrow {
  max-width: 560px;
}

.article-head {
  margin-bottom: 26px;
}

.article-kicker {
  color: var(--text-mute);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.article-head h1 {
  font-size: clamp(28px, 3.6vw, 42px);
  margin-bottom: 12px;
}

.article-lead {
  color: var(--text-soft);
  font-size: 18px;
  line-height: 1.55;
}

.article-tool {
  margin-top: 14px;
  font-size: 14px;
  color: var(--text-mute);
}

/* The link inside the "Pairs with…" line is the whole point of the line, so
   it keeps the accent colour instead of inheriting the muted grey. */
.article-tool a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Article pages centre their column, so the breadcrumb has to centre with it
   or it floats a hundred pixels to the left of everything else. Index pages
   keep it flush left, because their content is flush left too. */
body[data-page='guide'] main > .breadcrumb,
body[data-page='blog'] main > .breadcrumb {
  max-width: 640px;
  margin-inline: auto;
}

body[data-page='faq'] main > .breadcrumb,
body[data-page='page'] main > .breadcrumb {
  max-width: 560px;
  margin-inline: auto;
}

.article-updated {
  margin-top: 12px;
  color: var(--text-mute);
  font-size: 13px;
}

/* ---------- toc ---------- */

.toc {
  margin-bottom: 28px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}

.toc-title {
  font-family: var(--font-head);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: 8px;
}

.toc ol {
  display: grid;
  gap: 5px;
  counter-reset: toc;
}

.toc li {
  counter-increment: toc;
  font-size: 14px;
  line-height: 1.5;
}

.toc li::before {
  content: counter(toc) '. ';
  color: var(--text-mute);
}

/* ---------- prose ---------- */

.prose {
  font-size: 16.5px;
  line-height: 1.72;
  color: var(--text);
}

.prose > * + * {
  margin-top: 1.05em;
}

/* The article column is the reading measure — about 75 characters at this
   size. Capping paragraphs again inside it produced a ragged 100px gap on
   the right and heading rules that stopped short of the column edge. */
.prose > p,
.prose > ul,
.prose > ol,
.prose > blockquote,
.prose > h2,
.prose > h3 {
  max-width: none;
}

.prose h2 {
  font-size: clamp(21px, 2.2vw, 26px);
  margin-top: 1.9em;
  padding-top: 0.7em;
  border-top: 1px solid var(--border);
  scroll-margin-top: 84px;
}

.prose h3 {
  font-size: 18px;
  margin-top: 1.5em;
  scroll-margin-top: 84px;
}

.prose ul,
.prose ol {
  display: grid;
  gap: 0.5em;
  padding-left: 1.25em;
}

.prose ul {
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li::marker {
  color: var(--text-mute);
}

.prose a {
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 2px;
}

.prose a:hover {
  text-decoration-color: var(--primary);
}

.prose strong {
  font-weight: 650;
}

.prose blockquote {
  margin-left: 0;
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--primary);
  color: var(--text-soft);
  font-style: italic;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.12em 0.38em;
  border-radius: 5px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  /* inline code sits mid-sentence, so it must break rather than push the
     whole paragraph sideways on a phone */
  overflow-wrap: anywhere;
  word-break: break-word;
}

.prose pre {
  overflow-x: auto;
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--border);
}

/* A code block scrolls on its own; it must not inherit the inline rule. */
.prose pre code {
  padding: 0;
  border: 0;
  background: none;
  font-size: 13px;
  line-height: 1.6;
  overflow-wrap: normal;
  word-break: normal;
  white-space: pre;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 320px;
}

.prose th,
.prose td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.prose thead th {
  background: var(--surface-2);
  font-family: var(--font-head);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.prose td.num,
.prose th.num {
  text-align: right;
  white-space: nowrap;
}

/* ---------- cta ---------- */

.cta {
  margin-top: 40px;
  padding: 24px;
  background: var(--primary-soft);
  border-radius: var(--r-lg);
  text-align: center;
}

.cta-quiet {
  background: var(--surface);
  border: 1px solid var(--border);
}

.cta-label {
  color: var(--primary-strong);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.cta-note {
  margin-top: 12px;
  color: var(--text-soft);
  font-size: 13px;
}

/* ---------- related ---------- */

.related {
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
}

.related-title {
  font-size: 15px;
  margin-bottom: 14px;
}

.related ul {
  display: grid;
  gap: 10px;
}

.related a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text);
}

.related a:hover {
  text-decoration: none;
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.related-title-text {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 15px;
}

.related-note {
  color: var(--text-mute);
  font-size: 12.5px;
}

/* ---------- guide index ---------- */

.guide-list {
  display: grid;
  gap: 14px;
}

.guide-card {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  min-width: 0;
}

.guide-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-mute);
  padding-top: 4px;
}

.guide-card-body {
  min-width: 0;
}

.guide-card h2 {
  font-size: 19px;
  margin-bottom: 7px;
}

.guide-card p {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

.guide-card-tool {
  margin-top: 10px;
  font-size: 13.5px;
  color: var(--text-mute);
}

/* ---------- post list ---------- */

.post-list {
  display: grid;
  gap: 0;
}

.post-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}

.post-item:first-child {
  border-top: 1px solid var(--border);
}

.post-date {
  color: var(--text-mute);
  font-size: 13px;
  padding-top: 4px;
  white-space: nowrap;
}

.post-body {
  min-width: 0;
}

.post-body h2 {
  font-size: 19px;
  margin-bottom: 6px;
}

.post-body p {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

/* A bare word on its own line reads as a stray paragraph. As a chip it reads
   as the label it is. */
.post-tag {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* ---------- faq ---------- */

/* The FAQ index is seven short cards in five groups; at full wrap width each
   card is 90% empty space. A narrower column makes the grouping read as
   structure rather than as gaps. */
body[data-page='faq-index'] main > * {
  max-width: 760px;
  margin-inline: auto;
}

.faq-group {
  margin-bottom: 34px;
}

.faq-group h2 {
  font-size: 15px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: 12px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  min-width: 0;
}

.faq-item h3 {
  font-size: 16px;
  line-height: 1.35;
  margin-bottom: 6px;
}

.faq-item p {
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.55;
}

.faq-back {
  margin-top: 28px;
  font-size: 14px;
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 48px 0 28px;
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(4, minmax(0, 1fr));
  gap: 32px 24px;
}

.footer-col {
  min-width: 0;
}

.footer-col h4 {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: 12px;
}

.footer-col ul {
  display: grid;
  gap: 7px;
}

.footer-col a {
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

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

.footer-col .footer-more {
  font-weight: 600;
  color: var(--primary);
}

.brand-footer {
  margin-bottom: 10px;
}

.footer-tagline {
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.55;
  max-width: 30ch;
}

.footer-legal {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: grid;
  gap: 3px;
}

.copyright {
  color: var(--text-mute);
  font-size: 12.5px;
  line-height: 1.5;
}

/* ---------- responsive ---------- */

@media (max-width: 980px) {
  .tool-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  /* The result panel stops being sticky once it is below the form, otherwise
     it follows the reader around the page for no reason. */
  .tool-result {
    position: static;
  }

  .tool-grid,
  .audience-grid,
  .post-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 18px;
  }

  .nav-toggle {
    display: grid;
  }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 64px;
    padding: 10px var(--gutter) 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  /* Required alongside the `display: none` above, or the button does
     nothing when tapped. */
  .nav.is-open {
    display: block;
  }

  .nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    display: block;
    padding: 11px 14px;
    border-radius: var(--r-sm);
  }

  .hero-inner {
    padding: 44px var(--gutter) 40px;
  }

  .hero-title {
    max-width: none;
  }

  .section {
    padding-top: 42px;
  }

  .section-tint {
    margin-top: 42px;
    padding: 42px 0 44px;
  }

  .tool-grid,
  .audience-grid,
  .post-grid,
  .faq-preview {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .post-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .post-date {
    padding-top: 0;
  }

  .meter {
    grid-template-columns: minmax(0, 1fr) 60px 36px;
  }

  .result-body {
    padding: 18px;
  }

  .tool-form .field {
    padding: 16px 18px;
  }

  /* Wide tables scroll instead of being squeezed into unreadable columns.
     The lower bound only stops a table collapsing; `table-layout: auto` still
     lets a genuinely wide one scroll. */
  .prose table {
    min-width: 340px;
  }

  .prose {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .cta,
  .next-step,
  .toc {
    display: none;
  }
}