/* =============================================================
   VendingMachineBusiness.us — design system
   Editorial authority · modern · restrained. One accent (blue).
   ============================================================= */

:root {
  /* surfaces & ink */
  --bg: #fbfbfa;
  --surface: #ffffff;
  --surface-2: #f4f4f1;
  --ink: #17181c;
  --ink-2: #43454d;
  --muted: #6b6e77;
  --line: #e5e5e1;
  --line-strong: #d4d4cf;

  /* accent */
  --accent: #1a5cb0;
  --accent-ink: #123f7c;
  --accent-wash: #eef3fb;
  --accent-line: #cddcf0;

  /* semantic */
  --ok: #2f7d55;
  --ok-wash: #ecf6f0;
  --warn: #9a6a15;
  --warn-wash: #fbf3e4;

  /* type */
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --step--1: 0.8125rem;
  --step-0: 1.0625rem;
  --step-1: 1.1875rem;
  --step-2: clamp(1.35rem, 1.15rem + 0.9vw, 1.7rem);
  --step-3: clamp(1.7rem, 1.35rem + 1.7vw, 2.35rem);
  --step-4: clamp(2.15rem, 1.6rem + 2.9vw, 3.3rem);

  /* radii & elevation */
  --r-sm: 6px;
  --r: 10px;
  --r-lg: 14px;
  --shadow-xs: 0 1px 2px rgba(18, 18, 24, 0.05);
  --shadow-sm: 0 1px 2px rgba(18, 18, 24, 0.04), 0 3px 8px -2px rgba(18, 18, 24, 0.06);
  --shadow-md: 0 2px 6px -1px rgba(18, 18, 24, 0.06), 0 16px 36px -12px rgba(18, 18, 24, 0.16);
  --shadow-lg: 0 4px 12px -2px rgba(18, 18, 24, 0.08), 0 30px 66px -16px rgba(18, 18, 24, 0.30);
  --ring: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);

  /* motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.55, 0, 1, 0.45);
  --dur-fast: 0.15s;
  --dur: 0.24s;
  --dur-slow: 0.4s;

  --wrap: 1180px;
  --gap: clamp(1rem, 2.4vw, 1.75rem);
  --section-y: clamp(3.25rem, 7vw, 5.5rem);
}

/* ------------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  html.js .anim-up { opacity: 1 !important; transform: none !important; }
}

::selection { background: color-mix(in srgb, var(--accent) 20%, transparent); }

/* section-jump offset so the sticky header never covers a target */
:target { scroll-margin-top: 88px; }
[id] { scroll-margin-top: 88px; }

/* scroll-reveal (only with JS; never hides content for no-JS or reduced-motion) */
html.js .anim-up {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
html.js .anim-up.is-in { opacity: 1; transform: none; }

body {
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
[hidden] { display: none !important; }
a { color: var(--accent); text-decoration: none; transition: color var(--dur-fast) ease; }
a:hover { color: var(--accent-ink); }
strong { font-weight: 600; }
h1, h2, h3, h4 { font-family: var(--font-serif); font-weight: 600; line-height: 1.18; letter-spacing: -0.012em; color: var(--ink); text-wrap: balance; }
p { text-wrap: pretty; }
ul, ol { padding-left: 1.15rem; }

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

/* animated arrow affordance on "read more" style links */
.ar { display: inline-block; transition: transform var(--dur) var(--ease-out); will-change: transform; }
a:hover .ar,
.ecard:hover .ar,
.acard:hover .ar,
.chip-card:hover .ar { transform: translateX(4px); }

/* ------------------------------------------------------------- utilities */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(20px, 5vw, 44px); }
.wrap--narrow { max-width: 760px; }
.wrap--article { max-width: 1080px; }
.visually-hidden, .skip-link:not(:focus) {
  position: absolute !important; width: 1px; height: 1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 200; background: var(--ink); color: #fff;
  padding: 10px 16px; border-radius: var(--r-sm); font-size: var(--step--1); font-weight: 600;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--font-sans); font-weight: 600; font-size: var(--step--1);
  letter-spacing: 0.01em; padding: 0.78rem 1.35rem; border-radius: var(--r-sm);
  border: 1px solid transparent; cursor: pointer;
  transition: background-color var(--dur-fast) ease, color var(--dur-fast) ease,
    border-color var(--dur-fast) ease, transform var(--dur) var(--ease-out),
    box-shadow var(--dur) var(--ease-out);
}
.btn:active { transform: translateY(0) scale(0.985); transition-duration: 0.06s; }
.btn--sm { padding: 0.55rem 0.95rem; }
.btn--primary { background: var(--ink); color: #fff; box-shadow: var(--shadow-xs); }
.btn--primary:hover { background: #000; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--primary:active { transform: translateY(0) scale(0.985); box-shadow: var(--shadow-xs); }
.btn--ghost { background: var(--surface); color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); color: var(--ink); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn--ghost:active { transform: translateY(0) scale(0.985); box-shadow: none; }

/* ------------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.6) blur(10px);
  -webkit-backdrop-filter: saturate(1.6) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease, background-color var(--dur) ease;
}
.site-header--scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 1px 0 rgba(18, 18, 24, 0.02), 0 10px 28px -18px rgba(18, 18, 24, 0.28);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}
.site-header__bar { display: flex; align-items: center; gap: 1.5rem; height: 66px; }
.brand { display: inline-flex; align-items: center; gap: 0.55rem; color: var(--ink); font-weight: 600; }
.brand:hover { color: var(--ink); }
.brand__text { font-family: var(--font-serif); font-size: 1.12rem; letter-spacing: -0.01em; }
.brand__text--muted { color: var(--muted); }
.brand__mark { border-radius: 6px; transition: transform var(--dur) var(--ease-out); }
.brand:hover .brand__mark { transform: rotate(-6deg) scale(1.05); }

.nav { display: flex; align-items: center; margin-right: auto; min-width: 0; }
.nav__list { list-style: none; display: flex; align-items: center; gap: 0.05rem; padding: 0; margin: 0; }
.nav__item { position: relative; }
.nav__item--util { display: none; }
.nav__link {
  position: relative;
  display: inline-flex; align-items: center; gap: 0.28rem;
  padding: 0.45rem 0.6rem; border-radius: var(--r-sm);
  color: var(--ink-2); font-size: 0.86rem; font-weight: 500; white-space: nowrap;
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease;
}
.nav__link:hover { color: var(--ink); background: var(--surface-2); }
.nav__item.is-current > .nav__link { color: var(--ink); }
.nav__item.is-current > .nav__link::after {
  content: ""; position: absolute; left: 0.6rem; right: 0.6rem; bottom: -1px; height: 2px;
  background: var(--accent); border-radius: 2px;
}
.nav__caret {
  width: 5px; height: 5px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px); opacity: 0.5;
  transition: transform var(--dur) var(--ease-out), opacity var(--dur-fast) ease;
}
.has-mega:hover .nav__caret,
.has-mega:focus-within .nav__caret { transform: rotate(225deg) translateY(-2px); opacity: 0.8; }
@media (min-width: 1081px) and (max-width: 1220px) {
  .nav__link { padding-inline: 0.48rem; font-size: 0.82rem; }
  .site-header__bar { gap: 1rem; }
}
.nav__toggle { display: none; }

/* mega menu */
.mega {
  position: absolute; top: 100%; left: 0; margin-top: 10px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg); box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(8px) scale(0.985);
  transform-origin: top center;
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility var(--dur);
}
.mega--cols2 { width: 620px; }
.mega--cols3 { width: 780px; }
.mega { max-width: calc(100vw - 24px); }
.mega--right { left: auto; right: 0; }
.has-mega:hover .mega,
.has-mega:focus-within .mega,
.mega.is-open { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0) scale(1); }
.mega::before { content: ""; position: absolute; inset: -14px 0 auto 0; height: 16px; }
.mega__inner { display: grid; grid-template-columns: 0.85fr 1.6fr; gap: 1.6rem; padding: 1.4rem 1.5rem; }
.mega--cols3 .mega__inner { grid-template-columns: 0.7fr 2fr; }
.mega__lead { border-right: 1px solid var(--line); padding-right: 1.4rem; }
.mega__title { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 600; margin-bottom: 0.35rem; }
.mega__summary { font-size: var(--step--1); color: var(--muted); line-height: 1.5; margin-bottom: 0.9rem; }
.mega__all { font-size: var(--step--1); font-weight: 600; }
.mega__cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.1rem 1.4rem; }
.mega--cols3 .mega__cols { grid-template-columns: repeat(3, 1fr); }
.mega__heading { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.55rem; }
.mega__col ul { list-style: none; padding: 0; display: grid; gap: 0.15rem; }
.mega__col a {
  display: block; color: var(--ink-2); font-size: 0.9rem;
  padding: 0.32rem 0.55rem; margin-left: -0.55rem; border-radius: var(--r-sm);
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
}
.mega__col a:hover { color: var(--accent); background: var(--accent-wash); transform: translateX(2px); }
.mega__all { display: inline-flex; align-items: center; gap: 0.3rem; }

.site-header__actions { display: flex; align-items: center; gap: 0.35rem; flex-shrink: 0; }
.header-guides { font-size: 0.86rem; font-weight: 500; color: var(--ink-2); padding: 0.45rem 0.6rem; border-radius: var(--r-sm); }
.header-guides:hover { color: var(--ink); background: var(--surface-2); }
.header-search {
  display: inline-flex; align-items: center; gap: 0.45rem;
  border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  padding: 0.45rem 0.7rem; color: var(--muted); font-size: 0.84rem; background: var(--surface);
}
.header-search svg { width: 15px; height: 15px; transition: transform var(--dur) var(--ease-out); }
.header-search { transition: color var(--dur-fast) ease, border-color var(--dur-fast) ease, background-color var(--dur-fast) ease; }
.header-search:hover { color: var(--ink); border-color: var(--ink); background: var(--surface-2); }
.header-search:hover svg { transform: scale(1.1); }
.header-guides { transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease; }
@media (max-width: 1320px) { .header-search__label { display: none; } .header-search { padding: 0.45rem 0.55rem; } }

/* ------------------------------------------------------------- hero */
.hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(60% 90% at 82% 0%, color-mix(in srgb, var(--accent) 6%, transparent), transparent 70%),
    linear-gradient(180deg, var(--surface), var(--bg));
}
.hero__inner { display: grid; grid-template-columns: 1.35fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; padding-block: clamp(3.5rem, 8vw, 6rem); }
.hero__kicker { font-size: var(--step--1); font-weight: 600; letter-spacing: 0.02em; color: var(--accent); margin-bottom: 1rem; }
.hero__kicker::before {
  content: ""; display: inline-block; width: 1.6rem; height: 1px; margin-right: 0.7rem;
  vertical-align: middle; background: var(--accent-line);
}
.hero__title { font-size: var(--step-4); letter-spacing: -0.02em; margin-bottom: 1.1rem; }
.hero__lede { font-size: var(--step-1); color: var(--ink-2); line-height: 1.55; max-width: 34ch; margin-bottom: 1.9rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* gentle on-load entrance for hero + first estimator */
@media (prefers-reduced-motion: no-preference) {
  html.js .hero__copy > *,
  html.js .hero__aside {
    animation: heroRise 0.62s var(--ease-out) both;
  }
  html.js .hero__kicker { animation-delay: 0.02s; }
  html.js .hero__title { animation-delay: 0.08s; }
  html.js .hero__lede { animation-delay: 0.16s; }
  html.js .hero__actions { animation-delay: 0.24s; }
  html.js .hero__aside { animation-delay: 0.3s; }
}
@keyframes heroRise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}
/* hero route estimator */
.hcalc {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  box-shadow: var(--shadow-md); padding: 1.5rem 1.6rem 1.4rem;
  display: grid; gap: 0.35rem;
}
.hcalc__eyebrow { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.5rem; }
.hcalc__control { display: grid; }
.hcalc__control + .hcalc__control { margin-top: 0.55rem; }
.hcalc__row { display: flex; justify-content: space-between; align-items: baseline; gap: 0.75rem; }
.hcalc__row label { font-size: var(--step--1); color: var(--ink-2); }
.hcalc__row output { font-family: var(--font-serif); font-size: 1rem; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
.hcalc__range {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; margin: 0.7rem 0 0.15rem; padding: 0;
  border-radius: 999px; cursor: pointer; touch-action: manipulation;
  background:
    linear-gradient(var(--accent), var(--accent)) 0 / var(--fill, 50%) 100% no-repeat,
    var(--surface-2);
}
.hcalc__range { transition: background-size var(--dur) var(--ease-out); }
.hcalc__range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--accent);
  box-shadow: var(--shadow-sm); cursor: pointer;
}
.hcalc__range::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--accent); cursor: pointer;
  transition: transform var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
}
.hcalc__range:hover::-webkit-slider-thumb { border-color: var(--accent-ink); box-shadow: var(--shadow-md); }
.hcalc__range:hover::-moz-range-thumb { border-color: var(--accent-ink); }
.hcalc__range:focus-visible { outline: none; }
.hcalc__range:focus-visible::-webkit-slider-thumb { box-shadow: var(--ring); }
.hcalc__range:focus-visible::-moz-range-thumb { box-shadow: var(--ring); }
@media (prefers-reduced-motion: no-preference) {
  .hcalc__range::-webkit-slider-thumb { transition: transform var(--dur-fast) ease, border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease; }
  .hcalc__range:hover::-webkit-slider-thumb { transform: scale(1.08); }
  .hcalc__range:active::-webkit-slider-thumb { transform: scale(1.18); }
  .hcalc__range:active::-moz-range-thumb { transform: scale(1.18); }
}
.hcalc__out {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.65rem;
  margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line);
}
.hcalc__out div { display: grid; gap: 0.2rem; }
.hcalc__out dt { font-size: 0.66rem; font-weight: 600; letter-spacing: 0.02em; text-transform: uppercase; color: var(--muted); line-height: 1.3; }
.hcalc__out dd { font-family: var(--font-serif); font-size: 1.1rem; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
.hcalc__out dd.is-bump { animation: numBump 0.4s var(--ease-out); }
@keyframes numBump {
  0% { transform: translateY(0); color: var(--ink); }
  35% { transform: translateY(-3px); color: var(--accent); }
  100% { transform: translateY(0); color: var(--ink); }
}
.hcalc__note { font-size: 0.72rem; color: var(--muted); line-height: 1.5; margin-top: 0.9rem; }
.hcalc__note a { color: var(--accent); font-weight: 500; white-space: nowrap; }

/* ------------------------------------------------------------- /tools/ calculators */
.tools-hero { padding-block: clamp(2.5rem, 6vw, 4rem) 0; text-align: left; }
.tools-hero h1 { font-size: var(--step-4); letter-spacing: -0.02em; margin-bottom: 1rem; }

.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.tool-card .ecard__desc { flex-grow: 1; }

.tools-hero--tool { padding-block: clamp(2rem, 5vw, 3.25rem) 0; }
.tool-kicker { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--accent); margin: 0.9rem 0 0.6rem; }
.tool-lede { color: var(--muted); font-size: var(--step-1); max-width: 60ch; margin-top: 0.4rem; }

.tool-switcher-wrap { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface-2); }
.tool-switcher { display: flex; flex-wrap: wrap; gap: 0.5rem; padding-block: 1rem; }
.tool-switcher__chip { text-decoration: none; }

.calc-section .wrap--narrow { display: grid; gap: clamp(2rem, 5vw, 3rem); }
.tool-explainer { padding-top: 0.25rem; }

.calc__out4 dd.calc__out--negative,
.calc__total output.calc__out--negative { color: var(--warn); }

.calc-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  box-shadow: var(--shadow-md); padding: clamp(1.5rem, 4vw, 2.25rem);
}
.calc-card__eyebrow { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.6rem; }
.calc-card__title { font-size: var(--step-2); margin-bottom: 0.5rem; }
.calc-card__sub { color: var(--muted); font-size: var(--step--1); max-width: 56ch; margin-bottom: 1.6rem; }

.calc { display: grid; gap: 1.3rem; }
.calc__row-head { display: flex; justify-content: space-between; align-items: baseline; gap: 0.75rem; }
.calc__label { font-size: var(--step--1); font-weight: 500; color: var(--ink-2); }
.calc__row output { font-family: var(--font-serif); font-size: 1rem; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }

.calc__choices { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.5rem; }
.calc__chip {
  position: relative; cursor: pointer; border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  padding: 0.55rem 0.9rem; font-size: var(--step--1); color: var(--ink-2); background: var(--surface);
  transition: border-color var(--dur-fast) ease, background-color var(--dur-fast) ease, color var(--dur-fast) ease;
}
.calc__chip input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.calc__chip em { font-style: normal; color: var(--muted); margin-left: 0.35rem; }
.calc__chip:has(input:checked) { border-color: var(--ink); background: var(--ink); color: #fff; }
.calc__chip:has(input:checked) em { color: #c9cad0; }
.calc__chip:has(input:focus-visible) { box-shadow: var(--ring); }

.calc__range {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; margin: 0.7rem 0 0.15rem; padding: 0;
  border-radius: 999px; cursor: pointer; touch-action: manipulation;
  background: linear-gradient(var(--accent), var(--accent)) 0 / var(--fill, 50%) 100% no-repeat, var(--surface-2);
  transition: background-size var(--dur) var(--ease-out);
}
.calc__range::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--accent); box-shadow: var(--shadow-sm); cursor: pointer;
}
.calc__range::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%; background: var(--surface); border: 2px solid var(--accent); cursor: pointer;
}
.calc__range:hover::-webkit-slider-thumb { border-color: var(--accent-ink); box-shadow: var(--shadow-md); }
.calc__range:focus-visible { outline: none; }
.calc__range:focus-visible::-webkit-slider-thumb, .calc__range:focus-visible::-moz-range-thumb { box-shadow: var(--ring); }
@media (prefers-reduced-motion: no-preference) {
  .calc__range::-webkit-slider-thumb { transition: transform var(--dur-fast) ease, border-color var(--dur-fast) ease; }
  .calc__range:hover::-webkit-slider-thumb { transform: scale(1.08); }
  .calc__range:active::-webkit-slider-thumb { transform: scale(1.18); }
}

.calc__toggles { display: grid; gap: 0.6rem; }
.calc__toggle { display: flex; align-items: baseline; gap: 0.6rem; font-size: var(--step--1); color: var(--ink-2); cursor: pointer; }
.calc__toggle input { accent-color: var(--ink); width: 16px; height: 16px; flex-shrink: 0; transform: translateY(2px); }
.calc__toggle em { font-style: normal; color: var(--muted); margin-left: 0.3rem; }

.calc__breakdown { display: grid; gap: 0; border-top: 1px solid var(--line); padding-top: 0.9rem; }
.calc__breakdown > div { display: flex; justify-content: space-between; padding: 0.4rem 0; font-size: var(--step--1); color: var(--ink-2); }
.calc__breakdown dd { font-variant-numeric: tabular-nums; color: var(--ink); font-weight: 500; }
.calc__total {
  display: flex; justify-content: space-between; align-items: baseline;
  border-top: 1px solid var(--line-strong); margin-top: 0.3rem; padding-top: 0.9rem;
  font-size: var(--step-1); font-weight: 600;
}
.calc__total output { font-family: var(--font-serif); font-size: var(--step-2); color: var(--accent-ink); font-variant-numeric: tabular-nums; }
.calc__total output.is-bump, .calc__out4 dd.is-bump, .calc__pct-badge.is-bump { animation: numBump 0.4s var(--ease-out); }

.calc__total-figures { display: flex; align-items: baseline; gap: 0.6rem; }
.calc__pct-badge {
  font-size: var(--step--1); font-weight: 700; color: var(--accent-ink);
  background: var(--accent-wash); border-radius: 999px; padding: 0.2rem 0.65rem;
  font-variant-numeric: tabular-nums; white-space: nowrap;
}
.calc__pct-badge.calc__out--negative { color: var(--warn); background: var(--warn-wash); }

.calc__out4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.65rem; margin-top: 0.4rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.calc__out4 div { display: grid; gap: 0.2rem; }
.calc__out4 dt { font-size: 0.64rem; font-weight: 600; letter-spacing: 0.02em; text-transform: uppercase; color: var(--muted); line-height: 1.3; }
.calc__out4 dd { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }

.calc__note { font-size: 0.72rem; color: var(--muted); line-height: 1.5; }
.calc__note a { color: var(--accent); font-weight: 500; }

@media (max-width: 560px) {
  .calc__out4 { grid-template-columns: repeat(2, 1fr); }
}

/* ------------------------------------------------------------- sections */
.section { padding-block: var(--section-y); }
.section + .section { border-top: 1px solid var(--line); }
.section__head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: clamp(1.75rem, 4vw, 2.75rem); }
.section__title { font-size: var(--step-3); }
.section__sub { color: var(--muted); font-size: var(--step-1); max-width: 52ch; margin-top: 0.5rem; }
.section__link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-weight: 600; font-size: var(--step--1); white-space: nowrap;
}
.section__head .section__sub { flex-basis: 100%; }

/* start here */
.start-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.start-card {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 0.5rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
  padding: 1.4rem 1.35rem 1.5rem; box-shadow: var(--shadow-sm);
  transition: border-color var(--dur) ease, transform var(--dur) var(--ease-out), box-shadow var(--dur) ease;
}
.start-card::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--accent); transform: scaleY(0); transform-origin: top;
  transition: transform var(--dur) var(--ease-out);
}
.start-card:hover { border-color: var(--line-strong); transform: translateY(-4px); box-shadow: var(--shadow-md); color: var(--ink); }
.start-card:hover::before { transform: scaleY(1); }
.start-card:active { transform: translateY(-1px); }
.start-card__step { font-family: var(--font-serif); font-size: 0.95rem; color: var(--accent); font-weight: 600; }
.start-card__title { font-family: var(--font-serif); font-size: 1.15rem; font-weight: 600; color: var(--ink); }
.start-card__desc { font-size: var(--step--1); color: var(--muted); line-height: 1.55; }

/* explore grid */
.explore-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.ecard {
  display: flex; flex-direction: column; align-items: flex-start; gap: 0.55rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
  padding: 1.5rem 1.5rem 1.6rem; box-shadow: var(--shadow-sm);
  transition: border-color var(--dur) ease, transform var(--dur) var(--ease-out), box-shadow var(--dur) ease;
}
.ecard:hover { border-color: var(--accent-line); transform: translateY(-4px); box-shadow: var(--shadow-md); color: var(--ink); }
.ecard:active { transform: translateY(-1px); }
.ecard__icon {
  display: inline-flex; padding: 0.55rem; border-radius: var(--r-sm);
  background: var(--accent-wash); color: var(--accent); margin-bottom: 0.4rem;
  transition: transform var(--dur) var(--ease-out), background-color var(--dur) ease;
}
.ecard:hover .ecard__icon { transform: rotate(-5deg) scale(1.08); background: color-mix(in srgb, var(--accent) 14%, transparent); }
.ico { width: 20px; height: 20px; }
.ecard__kicker { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); }
.ecard__title { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 600; color: var(--ink); transition: color var(--dur-fast) ease; }
.ecard:hover .ecard__title { color: var(--accent-ink); }
.ecard__desc { font-size: var(--step--1); color: var(--ink-2); line-height: 1.55; }
.ecard__go { display: inline-flex; align-items: center; gap: 0.35rem; margin-top: auto; padding-top: 0.6rem; font-size: var(--step--1); font-weight: 600; color: var(--accent); }

/* article cards */
.acard-grid { display: grid; gap: var(--gap); }
.acard-grid--2 { grid-template-columns: repeat(2, 1fr); }
.acard-grid--3 { grid-template-columns: repeat(3, 1fr); }
.acard-grid--4 { grid-template-columns: repeat(4, 1fr); }
.acard-grid--feature { grid-template-columns: 1.6fr 1fr 1fr; }
.acard {
  display: flex; flex-direction: column; gap: 0.55rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
  padding: 1.35rem 1.35rem 1.45rem; box-shadow: var(--shadow-sm);
  transition: border-color var(--dur) ease, transform var(--dur) var(--ease-out), box-shadow var(--dur) ease;
}
.acard:hover { border-color: var(--line-strong); transform: translateY(-4px); box-shadow: var(--shadow-md); color: var(--ink); }
.acard:active { transform: translateY(-1px); }
.acard__cat { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.acard__title { font-family: var(--font-serif); font-size: 1.12rem; font-weight: 600; color: var(--ink); line-height: 1.3; transition: color var(--dur-fast) ease; }
.acard:hover .acard__title { color: var(--accent-ink); }
.acard__excerpt { font-size: var(--step--1); color: var(--muted); line-height: 1.55; }
.acard__meta { margin-top: auto; padding-top: 0.5rem; font-size: 0.78rem; color: var(--muted); }
.acard--featured { grid-row: span 1; }
.acard--featured .acard__title { font-size: 1.5rem; }
.acard--featured .acard__excerpt { font-size: var(--step-0); }

/* tools strip */
.tools-strip { background: var(--surface-2); }
.tools-strip__inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.tools-strip__list { list-style: none; padding: 0; display: grid; gap: 0.5rem; }
.tool-item {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 0.85rem 1.1rem;
  color: var(--ink); text-decoration: none;
  transition: border-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) ease;
}
.tool-item:hover { border-color: var(--accent-line); transform: translateX(3px); box-shadow: var(--shadow-xs); color: var(--ink); }
.tool-item__name { font-weight: 500; font-size: var(--step--1); }
.tool-item__end { display: flex; align-items: center; gap: 0.55rem; }
.tool-item__status { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); background: var(--accent-wash); padding: 0.25rem 0.55rem; border-radius: 99px; }

/* newsletter */
.newsletter__card {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: center;
  background: var(--ink); color: #fff; border-radius: var(--r-lg); padding: clamp(1.75rem, 4vw, 3rem);
}
.newsletter--inset { padding-block: 0 var(--section-y); border-top: 0; }
.newsletter__kicker { font-size: var(--step--1); font-weight: 600; color: #9db8dd; margin-bottom: 0.6rem; }
.newsletter__title { color: #fff; font-size: var(--step-2); margin-bottom: 0.6rem; }
.newsletter__text { color: #c9cad0; font-size: var(--step--1); line-height: 1.6; }
.newsletter__form { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.newsletter__form input {
  flex: 1 1 220px; padding: 0.8rem 1rem; border-radius: var(--r-sm); border: 1px solid #3a3c44;
  background: #232530; color: #fff; font: inherit; font-size: var(--step--1);
  transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease, background-color var(--dur-fast) ease;
}
.newsletter__form input::placeholder { color: #8a8c95; }
.newsletter__form input:hover { border-color: #55575f; }
.newsletter__form input:focus { outline: none; border-color: #9db8dd; background: #262834; box-shadow: 0 0 0 3px rgba(157, 184, 221, 0.18); }
.newsletter__form input:focus-visible { outline: none; }
.newsletter__form .btn { transition: background-color var(--dur-fast) ease, transform var(--dur) var(--ease-out); }
.newsletter__form .btn--primary { background: #fff; color: var(--ink); }
.newsletter__form .btn--primary:hover { background: #eef3fb; transform: translateY(-2px); }
.newsletter__note { flex-basis: 100%; font-size: 0.75rem; color: #8a8c95; margin-top: 0.2rem; }

/* ------------------------------------------------------------- footer */
.site-footer { border-top: 1px solid var(--line); background: var(--surface); margin-top: var(--section-y); }
.site-footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; padding-block: clamp(2.5rem, 5vw, 3.75rem); }
.site-footer__tagline { color: var(--muted); font-size: var(--step--1); line-height: 1.6; max-width: 40ch; margin-top: 0.9rem; }
.site-footer__heading { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.85rem; }
.site-footer__col ul { list-style: none; padding: 0; display: grid; gap: 0.5rem; }
.site-footer__col a { display: inline-block; color: var(--ink-2); font-size: 0.9rem; transition: color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out); }
.site-footer__col a:hover { color: var(--accent); transform: translateX(3px); }
.site-footer__legal { border-top: 1px solid var(--line); padding-block: 1.4rem; }
.site-footer__legal p { font-size: 0.8rem; color: var(--muted); }
.brand--footer .brand__text { font-size: 1rem; }

/* ------------------------------------------------------------- breadcrumbs */
.breadcrumbs { margin-bottom: 1.5rem; }
.breadcrumbs ol { list-style: none; padding: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; font-size: 0.82rem; }
.breadcrumbs a { color: var(--muted); border-radius: 3px; }
.breadcrumbs a:hover { color: var(--accent); }
.breadcrumbs li[aria-current] { color: var(--ink-2); }
.crumb-sep { color: var(--line-strong); }

/* ------------------------------------------------------------- prose */
.prose { font-size: var(--step-0); color: var(--ink); }
.prose > * + * { margin-top: 1.15rem; }
.prose h2 { font-size: var(--step-2); margin-top: 2.6rem; padding-top: 0.3rem; }
.prose h3 { font-size: var(--step-1); margin-top: 1.9rem; }
.prose h2 + p, .prose h3 + p { margin-top: 0.7rem; }
.prose p, .prose li { line-height: 1.72; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li + li { margin-top: 0.4rem; }
.prose a {
  font-weight: 500;
  text-decoration-line: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 34%, transparent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.18em;
  transition: text-decoration-color var(--dur-fast) ease, color var(--dur-fast) ease;
}
.prose a:hover { color: var(--accent-ink); text-decoration-color: currentColor; }
.prose strong { color: var(--ink); }
.prose blockquote { border-left: 3px solid var(--accent); padding-left: 1.1rem; color: var(--ink-2); font-style: normal; }
.prose code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9em; background: var(--surface-2); padding: 0.12em 0.4em; border-radius: 4px; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin-block: 2.25rem; }
.prose h2 .anchor, .prose h3 .anchor {
  float: left; margin-left: -1.15em; padding-right: 0.35em; color: var(--line-strong);
  opacity: 0; transition: opacity 0.15s ease; text-decoration: none; font-weight: 400;
}
.prose h2:hover .anchor, .prose h3:hover .anchor { opacity: 1; }

.table-wrap { overflow-x: auto; overflow-y: hidden; margin-block: 1.5rem; border: 1px solid var(--line); border-radius: var(--r-sm); }
.prose table { width: 100%; min-width: 480px; border-collapse: collapse; font-size: var(--step--1); }
.prose table thead { background: var(--surface-2); }
.prose th, .prose td { text-align: left; padding: 0.75rem 0.95rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-family: var(--font-sans); font-weight: 600; font-size: 0.8rem; letter-spacing: 0.02em; text-transform: uppercase; color: var(--ink-2); }
.prose tbody tr { transition: background-color var(--dur-fast) ease; }
.prose tbody tr:hover { background: var(--accent-wash); }
.prose tbody tr:last-child td { border-bottom: 0; }

/* callouts (from ::: directives) */
.callout {
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  background: var(--surface); border-radius: var(--r-sm); padding: 1.15rem 1.3rem;
  box-shadow: var(--shadow-xs);
}
.callout > * + * { margin-top: 0.6rem; }
.callout a { text-decoration-thickness: 1.5px; }
.callout__title { font-family: var(--font-sans); font-weight: 700; font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); }
.callout--tip { border-left-color: var(--accent); background: var(--accent-wash); }
.callout--note { border-left-color: var(--line-strong); background: var(--surface-2); }
.callout--warning { border-left-color: var(--warn); background: var(--warn-wash); }
.callout--keytakeaways { border-left-color: var(--ok); background: var(--ok-wash); }
.callout--example { border-left-color: var(--ink-2); }

/* ------------------------------------------------------------- doc/page */
.doc { padding-block: clamp(2.5rem, 6vw, 4.5rem) var(--section-y); }
.doc__head { margin-bottom: 2rem; }
.doc__head h1 { font-size: var(--step-3); margin-bottom: 0.5rem; }
.doc__meta { font-size: var(--step--1); color: var(--muted); }

/* ------------------------------------------------------------- cornerstone */
.cornerstone__hero {
  background:
    radial-gradient(50% 100% at 88% 0%, color-mix(in srgb, var(--accent) 5%, transparent), transparent 72%),
    linear-gradient(180deg, var(--surface), var(--bg));
  border-bottom: 1px solid var(--line); padding-block: clamp(2.5rem, 6vw, 4rem);
}
.cornerstone__title { font-size: var(--step-4); letter-spacing: -0.02em; max-width: 18ch; margin-bottom: 1rem; }
.cornerstone__lede { font-size: var(--step-1); color: var(--ink-2); line-height: 1.6; max-width: 62ch; }
.cornerstone__updated { font-size: 0.8rem; color: var(--muted); margin-top: 1.1rem; }
.cornerstone__layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: clamp(2rem, 5vw, 4rem); padding-block: clamp(2.5rem, 6vw, 4rem); }
.cornerstone__overview { margin-bottom: 1rem; }
.cs-section { margin-top: 3rem; }
.cs-section h2 { font-size: var(--step-2); margin-bottom: 0.4rem; }
.cs-section__blurb { color: var(--muted); font-size: var(--step--1); margin-bottom: 1.2rem; }
.cs-list { list-style: none; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.cs-list li { border-bottom: 1px solid var(--line); }
.cs-list a {
  display: grid; gap: 0.2rem; padding: 0.95rem 0.9rem 0.95rem 0.25rem; color: var(--ink);
  border-radius: var(--r-sm); position: relative;
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease, padding-left var(--dur) var(--ease-out);
}
.cs-list a::after {
  content: "\2192"; position: absolute; right: 0.6rem; top: 0.95rem;
  color: var(--accent); opacity: 0; transform: translateX(-4px);
  transition: opacity var(--dur-fast) ease, transform var(--dur) var(--ease-out);
}
.cs-list a:hover { color: var(--accent); background: var(--accent-wash); padding-left: 0.7rem; }
.cs-list a:hover::after { opacity: 1; transform: translateX(0); }
.cs-list__title { font-weight: 500; }
.cs-list__desc { font-size: 0.82rem; color: var(--muted); line-height: 1.5; }

.tool-teaser { border: 1px dashed var(--accent-line); border-radius: var(--r); padding: 1.5rem; background: var(--accent-wash); }
.tool-teaser__tag { display: inline-block; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 0.6rem; }
.tool-teaser p { color: var(--ink-2); font-size: var(--step--1); margin-bottom: 0.7rem; }
.tool-teaser a { display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 600; font-size: var(--step--1); }
.tool-teaser__tag::before {
  content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 0.5rem;
  border-radius: 50%; background: var(--accent); vertical-align: middle;
}

/* FAQ (also used by JSON-LD FAQPage) */
.faq { border-top: 1px solid var(--line); padding-top: 0.5rem; }
.faq__item { padding-block: 1.25rem; border-bottom: 1px solid var(--line); }
.faq__item:first-of-type { padding-top: 1.5rem; }
.faq__q { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; }
.faq__a { color: var(--ink-2); font-size: var(--step--1); line-height: 1.65; }
.faq__a p + p { margin-top: 0.6rem; }

/* homepage FAQ section heading (matches .section__title sizing used elsewhere on the page) */
.home-faq h2 { font-size: var(--step-3); margin-bottom: 1.5rem; }

.cornerstone__aside { position: sticky; top: 90px; align-self: start; display: grid; gap: 1rem; }
.cs-toc-card { padding: 1.15rem 1.2rem 1.3rem; }
.cs-toc-card .toc { border-left: 0; padding-left: 0; }
.cs-toc-card .toc__label { padding-left: 0; }
.aside-card { border: 1px solid var(--line); border-radius: var(--r); padding: 1.15rem 1.2rem; background: var(--surface); box-shadow: var(--shadow-sm); }
.aside-card__label { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.7rem; }
.aside-jump { list-style: none; padding: 0; display: grid; gap: 0.15rem; }
.aside-jump a {
  display: block; font-size: 0.88rem; color: var(--ink-2);
  padding: 0.35rem 0.5rem; margin-inline: -0.5rem; border-radius: var(--r-sm);
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
}
.aside-jump a:hover { color: var(--accent); background: var(--accent-wash); transform: translateX(3px); }
.aside-card--muted { background: var(--surface-2); box-shadow: none; }
.aside-card--muted p { font-size: var(--step--1); color: var(--ink-2); margin-bottom: 0.9rem; }

/* related topics */
.related-topics { padding-block: clamp(2.5rem, 5vw, 3.5rem); border-top: 1px solid var(--line); }
.related-topics h2 { font-size: var(--step-2); margin-bottom: 1.25rem; }
.related-topics__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.chip-card { display: grid; gap: 0.35rem; border: 1px solid var(--line); border-radius: var(--r); padding: 1.1rem 1.2rem; background: var(--surface); box-shadow: var(--shadow-sm); transition: border-color var(--dur) ease, transform var(--dur) var(--ease-out), box-shadow var(--dur) ease; }
.chip-card:hover { border-color: var(--accent-line); transform: translateY(-4px); box-shadow: var(--shadow-md); color: var(--ink); }
.chip-card:active { transform: translateY(-1px); }
.chip-card__title { font-family: var(--font-serif); font-weight: 600; transition: color var(--dur-fast) ease; }
.chip-card:hover .chip-card__title { color: var(--accent-ink); }
.chip-card__desc { font-size: 0.82rem; color: var(--muted); line-height: 1.5; }

/* ------------------------------------------------------------- article */
.article { padding-block: clamp(2rem, 5vw, 3.5rem) 0; }
.article__head { margin-bottom: 2.5rem; }
.article__kicker { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(--accent); }
.article__title { font-size: var(--step-3); letter-spacing: -0.018em; margin: 0.7rem 0 1.1rem; max-width: 24ch; }
.article__byline { font-size: 0.82rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.article__dot { color: var(--line-strong); }
.article__body { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.article__rail { position: sticky; top: 90px; display: grid; gap: 1.25rem; font-size: 0.88rem; }
.article__content { max-width: 68ch; }

.toc { border-left: 2px solid var(--line); padding-left: 0; }
.toc__label { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.7rem; padding-left: 1rem; }
.toc ul { list-style: none; padding: 0; display: grid; gap: 0.1rem; }
.toc li { position: relative; }
.toc a {
  display: block; color: var(--muted); padding: 0.3rem 0.5rem 0.3rem 1rem;
  border-left: 2px solid transparent; margin-left: -2px;
  transition: color var(--dur-fast) ease, border-color var(--dur-fast) ease, background-color var(--dur-fast) ease;
}
.toc__item--h3 a { padding-left: 1.7rem; font-size: 0.84rem; }
.toc a:hover { color: var(--ink); }
.toc a.is-active { color: var(--accent); font-weight: 600; border-left-color: var(--accent); background: linear-gradient(90deg, var(--accent-wash), transparent); }

.parent-cta {
  display: grid; gap: 0.2rem; border: 1px solid var(--accent-line); background: var(--accent-wash);
  border-radius: var(--r); padding: 1rem 1.1rem;
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease, transform var(--dur) var(--ease-out);
}
.parent-cta:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.parent-cta__label { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent-ink); }
.parent-cta__title { font-family: var(--font-serif); font-weight: 600; color: var(--ink); }

.disclosure { border: 1px solid var(--line); background: var(--surface-2); border-radius: var(--r-sm); padding: 0.9rem 1.1rem; margin-bottom: 2rem; font-size: 0.85rem; color: var(--ink-2); }
.disclosure a { color: var(--accent); text-decoration-line: underline; text-decoration-thickness: 1.5px; text-underline-offset: 0.15em; }
.disclosure a:hover { color: var(--accent-ink); }

/* real operator quotes, pulled from public vending forums — attributed, linked, never invented */
.forum-quote {
  position: relative; margin-block: 1.75rem; padding: 1.4rem 1.5rem 1.3rem 2.1rem;
  background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--ink-2);
  border-radius: var(--r-sm); box-shadow: var(--shadow-xs);
}
.forum-quote::before {
  content: "\201C"; position: absolute; left: 0.55rem; top: 0.35rem;
  font-family: var(--font-serif); font-size: 2.4rem; line-height: 1; color: var(--line-strong);
}
.forum-quote p { font-family: var(--font-serif); font-size: 1.05rem; line-height: 1.55; color: var(--ink); font-style: normal; }
.forum-quote p + p { margin-top: 0.6rem; }
.forum-quote footer {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.4rem;
  margin-top: 0.9rem; font-family: var(--font-sans); font-size: 0.78rem; color: var(--muted);
}
.forum-quote__name { font-weight: 700; color: var(--ink-2); }
.forum-quote footer a { font-weight: 500; }

.continue { padding-block: clamp(2.5rem, 5vw, 3.5rem); border-top: 1px solid var(--line); }
.continue h2 { font-size: var(--step-2); margin-bottom: 1.25rem; }

/* ------------------------------------------------------------- search */
.search-overlay {
  position: fixed; inset: 0; z-index: 150; background: rgba(18, 18, 24, 0.42);
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
  display: grid; place-items: start center; padding-top: 12vh;
  animation: overlayIn 0.18s ease;
}
.search-overlay__panel {
  width: min(640px, 92vw); background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg); box-shadow: var(--shadow-lg); padding: 1.1rem; position: relative;
  animation: panelIn 0.26s var(--ease-out);
}
@keyframes overlayIn { from { opacity: 0; } }
@keyframes panelIn { from { opacity: 0; transform: translateY(-10px) scale(0.98); } }
.search-overlay__form { display: flex; gap: 0.5rem; }
.search-overlay__form input { flex: 1; padding: 0.85rem 1rem; border: 1px solid var(--line-strong); border-radius: var(--r-sm); font: inherit; transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease; }
.search-overlay__form input:focus { outline: none; border-color: var(--accent); box-shadow: var(--ring); }
.search-overlay__form button { padding: 0.5rem 1.1rem; border: 1px solid var(--ink); background: var(--ink); color: #fff; border-radius: var(--r-sm); font-weight: 600; cursor: pointer; transition: background-color var(--dur-fast) ease, transform var(--dur) var(--ease-out); }
.search-overlay__form button:hover { background: #000; transform: translateY(-1px); }
.search-overlay__form button:active { transform: translateY(0) scale(0.97); }
.search-overlay__results { margin-top: 0.75rem; display: grid; gap: 0.15rem; max-height: 50vh; overflow-y: auto; }
.search-overlay__close { position: absolute; top: -2.4rem; right: 0; background: transparent; border: 0; color: #fff; font-size: 0.8rem; cursor: pointer; opacity: 0.85; transition: opacity var(--dur-fast) ease; }
.search-overlay__close:hover { opacity: 1; }
.s-result { display: grid; gap: 0.15rem; padding: 0.7rem 0.75rem; border-radius: var(--r-sm); transition: background-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out); }
.s-result:hover, .s-result.is-active { background: var(--surface-2); transform: translateX(3px); }
.s-result__title { font-weight: 600; font-size: 0.95rem; color: var(--ink); }
.s-result__meta { font-size: 0.75rem; color: var(--muted); }
.s-result__excerpt { font-size: 0.82rem; color: var(--ink-2); }
.s-empty { padding: 0.9rem 0.75rem; color: var(--muted); font-size: var(--step--1); }

.search-page { padding-block: clamp(2.5rem, 6vw, 4.5rem) var(--section-y); }
.search-page__title { font-size: var(--step-3); margin-bottom: 1.25rem; }
.search-page__form { display: flex; gap: 0.6rem; margin-bottom: 1.25rem; }
.search-page__form input { flex: 1; padding: 0.9rem 1.1rem; border: 1px solid var(--line-strong); border-radius: var(--r-sm); font: inherit; font-size: var(--step-0); transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease; }
.search-page__form input:focus { outline: none; border-color: var(--accent); box-shadow: var(--ring); }
.search-page__form button { padding: 0.5rem 1.3rem; border: 1px solid var(--ink); background: var(--ink); color: #fff; border-radius: var(--r-sm); font-weight: 600; cursor: pointer; transition: background-color var(--dur-fast) ease, transform var(--dur) var(--ease-out); }
.search-page__form button:hover { background: #000; transform: translateY(-1px); }
.search-page__form button:active { transform: translateY(0) scale(0.98); }
.search-page__count { font-size: var(--step--1); color: var(--muted); margin-bottom: 1rem; }
.search-page__filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.chip { border: 1px solid var(--line-strong); background: var(--surface); border-radius: 99px; padding: 0.4rem 0.9rem; font-size: 0.82rem; cursor: pointer; color: var(--ink-2); transition: background-color var(--dur-fast) ease, color var(--dur-fast) ease, border-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out); }
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip:active { transform: scale(0.95); }
.chip.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }
.search-page__results { list-style: none; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.search-page__results li { border-bottom: 1px solid var(--line); padding: 1.1rem 0.5rem 1.1rem 0.25rem; border-radius: var(--r-sm); transition: background-color var(--dur-fast) ease, padding-left var(--dur) var(--ease-out); }
.search-page__results li:hover { background: var(--accent-wash); padding-left: 0.6rem; }
.search-page__results a { font-family: var(--font-serif); font-weight: 600; font-size: 1.1rem; color: var(--ink); }
.search-page__results a:hover { color: var(--accent); }
.search-page__results .s-result__meta { margin-top: 0.25rem; }
.search-page__results .s-result__excerpt { margin-top: 0.3rem; font-size: 0.88rem; color: var(--ink-2); }
.search-page__suggest { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-top: 0.6rem; }

/* ------------------------------------------------------------- listing / resources */
.listing__hero {
  background:
    radial-gradient(50% 100% at 88% 0%, color-mix(in srgb, var(--accent) 5%, transparent), transparent 72%),
    linear-gradient(180deg, var(--surface), var(--bg));
  border-bottom: 1px solid var(--line); padding-block: clamp(2.5rem, 6vw, 4rem);
}
.listing-group__head a { display: inline-flex; align-items: center; gap: 0.35rem; }
.listing__title { font-size: var(--step-4); letter-spacing: -0.02em; }
.listing__lede { font-size: var(--step-1); color: var(--ink-2); max-width: 60ch; margin-top: 1rem; }
.listing__count { font-size: 0.8rem; color: var(--muted); margin-top: 1rem; }
.listing__body { padding-block: clamp(2.5rem, 6vw, 4rem); }
.listing__intro { max-width: 66ch; margin-bottom: 2.5rem; }
.listing-group + .listing-group { margin-top: 3.25rem; }
.listing-group__head { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; padding-bottom: 0.6rem; border-bottom: 1px solid var(--line); }
.listing-group__head h2 { font-size: var(--step-2); }
.listing-group__head a { font-size: var(--step--1); font-weight: 600; white-space: nowrap; }
/* a topic group with no live articles yet (queue markers only, no cards between them) stays
   hidden until publish.php inserts its first real card */
.listing-group:has(.acard-grid:empty) { display: none; }

.res-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.res-card {
  border: 1px solid var(--line); border-radius: var(--r); padding: 1.4rem 1.4rem 1.5rem;
  background: var(--surface); box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 0.5rem;
  transition: border-color var(--dur) ease, transform var(--dur) var(--ease-out), box-shadow var(--dur) ease;
}
.res-card:hover { border-color: var(--line-strong); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.res-card__title { font-size: 1.1rem; }
.res-card__desc { font-size: var(--step--1); color: var(--ink-2); line-height: 1.55; }
.res-card__status { margin-top: auto; padding-top: 0.7rem; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }

/* ------------------------------------------------------------- article components */
.proscons { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-block: 1.75rem; }
.proscons__col { border: 1px solid var(--line); border-radius: var(--r-sm); padding: 1.15rem 1.3rem; background: var(--surface); box-shadow: var(--shadow-xs); }
.proscons__col--pro { border-top: 3px solid var(--ok); }
.proscons__col--con { border-top: 3px solid var(--warn); }
.proscons__col--pro .proscons__head { color: var(--ok); }
.proscons__col--con .proscons__head { color: var(--warn); }
.proscons__head { font-family: var(--font-sans); font-weight: 700; font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 0.6rem; }
.proscons ul { margin: 0; padding-left: 1.1rem; }
.proscons li { font-size: var(--step--1); line-height: 1.55; }
.proscons li + li { margin-top: 0.35rem; }

.pick-card {
  position: relative; overflow: hidden;
  border: 1px solid var(--accent-line); background: var(--accent-wash); border-radius: var(--r);
  padding: 1.4rem 1.5rem; margin-block: 1.75rem; box-shadow: var(--shadow-xs);
}
.pick-card::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--accent);
}
.pick-card__label { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 0.5rem; }
.pick-card__label::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.pick-card__title { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 600; color: var(--ink); margin-bottom: 0.5rem; }
.pick-card__body { font-size: var(--step--1); color: var(--ink-2); line-height: 1.6; margin-bottom: 0.8rem; }
.pick-card__cta { display: inline-flex; align-items: center; gap: 0.35rem; font-weight: 600; font-size: var(--step--1); }

/* ------------------------------------------------------------- responsive */
@media (max-width: 1080px) {
  .acard-grid--feature { grid-template-columns: 1fr 1fr; }
  .acard--featured { grid-column: span 2; }
  .cornerstone__layout { grid-template-columns: 1fr; }
  .cornerstone__aside { position: static; grid-template-columns: 1fr 1fr; }
  .article__body { grid-template-columns: 1fr; }
  .article__rail { position: static; grid-template-columns: 1fr; }
  .toc { display: none; }
}
@media (max-width: 1080px) {
  .brand { order: 1; }
  .site-header__actions { order: 2; margin-left: auto; }
  .nav { order: 3; margin: 0; }
  .nav__toggle { display: inline-flex; align-items: center; gap: 0.5rem; background: transparent; border: 1px solid var(--line-strong); border-radius: var(--r-sm); padding: 0.5rem 0.8rem; font: inherit; font-size: 0.875rem; font-weight: 600; cursor: pointer; color: var(--ink); }
  .nav__toggle-bars { width: 16px; height: 2px; background: var(--ink); position: relative; }
  .nav__toggle-bars::before, .nav__toggle-bars::after { content: ""; position: absolute; left: 0; width: 16px; height: 2px; background: var(--ink); }
  .nav__toggle-bars::before { top: -5px; }
  .nav__toggle-bars::after { top: 5px; }
  .nav__list {
    position: fixed; inset: 67px 0 auto 0; display: none;
    flex-direction: column; align-items: stretch; gap: 0;
    max-height: calc(100dvh - 67px); overflow-y: auto; padding: 0.5rem;
    background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: var(--shadow-md);
  }
  .nav__list.is-open { display: flex; }
  html.js .nav__list.is-open { animation: navDrop 0.24s var(--ease-out); }
  @keyframes navDrop { from { opacity: 0; transform: translateY(-10px); } }
  .nav__item.is-current > .nav__link::after { display: none; }
  .nav__item.is-current > .nav__link { box-shadow: inset 3px 0 0 var(--accent); }
  .nav__item.is-open > .nav__link .nav__caret { transform: rotate(225deg) translateY(-2px); opacity: 0.8; }
  .nav__item { border-bottom: 1px solid var(--line); }
  .nav__item:last-child { border-bottom: 0; }
  .nav__item--util { display: block; }
  .nav__item--util:first-of-type { margin-top: 0.35rem; border-top: 1px solid var(--line); }
  .nav__link { padding: 0.9rem 0.75rem; font-size: 1rem; justify-content: space-between; }
  .mega { position: static; transform: none; width: auto; margin: 0; box-shadow: none; border: 0; border-radius: 0; opacity: 1; visibility: visible; pointer-events: auto; display: none; background: var(--surface-2); }
  .nav__item.is-open .mega { display: block; }
  .mega__inner, .mega--cols3 .mega__inner { grid-template-columns: 1fr; gap: 1rem; padding: 0.5rem 1rem 1.25rem; }
  .mega__cols, .mega--cols3 .mega__cols { grid-template-columns: 1fr; gap: 1rem; }
  .mega__lead { border-right: 0; border-bottom: 1px solid var(--line); padding-right: 0; padding-bottom: 0.9rem; }
  .mega__cols { grid-template-columns: 1fr; gap: 1rem; }
  .header-search__label { display: none; }
  .header-guides { display: none; }
  .site-header__bar { gap: 0.75rem; }
  .brand__text { font-size: 1rem; }
}
@media (max-width: 980px) {
  .res-grid { grid-template-columns: 1fr 1fr; }
  .tool-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 780px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__aside { max-width: 460px; }
  .start-grid { grid-template-columns: 1fr 1fr; }
  .explore-grid { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: 1fr; }
  .res-grid { grid-template-columns: 1fr; }
  .proscons { grid-template-columns: 1fr; }
  .acard-grid--2, .acard-grid--3, .acard-grid--4, .acard-grid--feature { grid-template-columns: 1fr; }
  .acard--featured { grid-column: auto; }
  .acard--featured .acard__title { font-size: 1.3rem; }
  .tools-strip__inner { grid-template-columns: 1fr; }
  .newsletter__card { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
  .related-topics__grid { grid-template-columns: 1fr; }
  .cornerstone__aside { grid-template-columns: 1fr; }
}
@media (max-width: 460px) {
  .start-grid { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .brand__text { font-size: 0.9rem; }
  .site-header__bar { gap: 0.5rem; }
  .wrap { padding-inline: 18px; }
}

/* touch devices: hover lifts don't fire, so give a press response instead */
@media (hover: none) {
  html.js .anim-up { transform: translateY(10px); }
  .start-card:active,
  .ecard:active,
  .acard:active,
  .chip-card:active,
  .res-card:active { transform: scale(0.985); transition-duration: 0.08s; }
  .cs-list a:active,
  .aside-jump a:active,
  .mega__col a:active { background: var(--accent-wash); }
  .site-footer__col a:active { transform: translateX(3px); }
}

/* keep the mega-menu hover-intent bridge from blocking taps on touch */
@media (hover: none) {
  .mega::before { display: none; }
}