/* Tech Digest design system
   Mobile-first. No web fonts, no layout shift, no framework. */

/* ---------------------------------------------------------------- tokens */
:root {
  color-scheme: light dark;

  --ink:        #14181c;
  --ink-2:      #414b55;
  --ink-3:      #5a6570;
  --paper:      #fbfaf7;
  --surface:    #ffffff;
  --surface-2:  #f3f1ec;
  --line:       #e2ded5;
  --line-2:     #cec9bd;

  --accent:     #0e6a5f;
  --accent-ink: #0a4f47;
  --on-accent:  #ffffff;
  --accent-bg:  #e6f2ef;
  --warn:       #8a5300;
  --warn-bg:    #fdf3e0;
  --danger:     #9c2f2f;
  --danger-bg:  #fcecea;
  --info:       #245c8a;
  --info-bg:    #e9f1f8;

  --radius:   10px;
  --radius-s: 6px;
  --shadow:   0 1px 2px rgb(20 24 28 / .05), 0 4px 14px -8px rgb(20 24 28 / .18);

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;

  --shell: 74rem;
  --prose: 43rem;

  --step--1: clamp(.82rem, .79rem + .13vw, .875rem);
  --step-0:  clamp(1rem, .97rem + .16vw, 1.075rem);
  --step-1:  clamp(1.15rem, 1.09rem + .3vw, 1.3rem);
  --step-2:  clamp(1.35rem, 1.24rem + .55vw, 1.65rem);
  --step-3:  clamp(1.6rem, 1.4rem + .95vw, 2.1rem);
  --step-4:  clamp(1.95rem, 1.6rem + 1.6vw, 2.8rem);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink:       #e8ebee;
    --ink-2:     #b0b9c2;
    --ink-3:     #8a949e;
    --paper:     #0f1214;
    --surface:   #171b1f;
    --surface-2: #1e242a;
    --line:      #2b3238;
    --line-2:    #3c454d;

    --accent:     #4dbfae;
    --accent-ink: #7ad6c7;
    --on-accent:  #06201d;
    --accent-bg:  #10312d;
    --warn:       #e0a955;
    --warn-bg:    #322511;
    --danger:     #ef8f8f;
    --danger-bg:  #34191a;
    --info:       #7db6e3;
    --info-bg:    #12242f;
    --shadow:     0 1px 2px rgb(0 0 0 / .5), 0 6px 18px -10px rgb(0 0 0 / .7);
  }
}

:root[data-theme="dark"] {
  --ink:       #e8ebee;
  --ink-2:     #b0b9c2;
  --ink-3:     #8a949e;
  --paper:     #0f1214;
  --surface:   #171b1f;
  --surface-2: #1e242a;
  --line:      #2b3238;
  --line-2:    #3c454d;
  --accent:     #4dbfae;
  --accent-ink: #7ad6c7;
  --on-accent:  #06201d;
  --accent-bg:  #10312d;
  --warn:       #e0a955;
  --warn-bg:    #322511;
  --danger:     #ef8f8f;
  --danger-bg:  #34191a;
  --info:       #7db6e3;
  --info-bg:    #12242f;
  --shadow:     0 1px 2px rgb(0 0 0 / .5), 0 6px 18px -10px rgb(0 0 0 / .7);
}

/* ---------------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  overflow-x: hidden;
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }

a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }

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

::selection { background: var(--accent-bg); color: var(--ink); }

/* ---------------------------------------------------------------- layout */
.shell { width: 100%; max-width: var(--shell); margin-inline: auto; padding-inline: 1.1rem; }
@media (min-width: 48rem) { .shell { padding-inline: 1.75rem; } }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--on-accent); padding: .7rem 1.1rem;
  border-radius: 0 0 var(--radius-s) 0; font-weight: 600;
}
.skip:focus { left: 0; }

main { display: block; }

/* ---------------------------------------------------------------- header */
.masthead {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 95%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.masthead-in {
  display: flex; align-items: center; gap: .75rem; flex-wrap: wrap;
  min-height: 3.6rem; padding-block: .35rem;
}
.brand {
  display: inline-flex; align-items: center; gap: .5rem;
  font-weight: 700; letter-spacing: -.022em; font-size: 1.06rem;
  color: var(--ink); text-decoration: none; flex: none;
}
.brand:hover { color: var(--accent-ink); }
.brand-mark {
  width: 1.6rem; height: 1.6rem; flex: none;
  border-radius: 5px; background: var(--accent); color: var(--on-accent);
  display: grid; place-items: center; font-size: .82rem; font-weight: 800;
  letter-spacing: -.04em;
}

.brand-name em { font-style: normal; color: var(--accent-ink); }

.nav-toggle {
  margin-left: auto; display: none; align-items: center; gap: .4rem;
  background: none; border: 1px solid var(--line-2); border-radius: var(--radius-s);
  padding: .38rem .6rem; cursor: pointer; font-size: var(--step--1); font-weight: 600;
}
.js .nav-toggle { display: inline-flex; }
.nav-toggle svg { width: 1.05rem; height: 1.05rem; }
@media (min-width: 62rem) { .js .nav-toggle { display: none; } }

/* Without JavaScript the menu is simply a list, always reachable. */
.nav { display: block; width: 100%; order: 3; }
.js .nav { display: none; width: auto; }
.js .nav.open { display: block; }
@media (min-width: 62rem) {
  .nav, .js .nav { display: block; margin-left: auto; width: auto; order: 0; }
}
.nav ul {
  list-style: none; padding: .5rem 0 1rem; margin: 0;
  display: flex; flex-direction: column; gap: .1rem;
}
@media (min-width: 62rem) {
  .nav ul { flex-direction: row; align-items: center; gap: .15rem; padding: 0; }
}
.nav a {
  display: block; padding: .55rem .6rem; border-radius: var(--radius-s);
  text-decoration: none; color: var(--ink-2); font-weight: 550; font-size: var(--step--1);
}
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a[aria-current="true"] { color: var(--accent-ink); background: var(--accent-bg); }

.theme-btn { display: none; }
.js .theme-btn {
  background: none; border: 1px solid var(--line-2); border-radius: var(--radius-s);
  width: 2.1rem; height: 2.1rem; display: grid; place-items: center; cursor: pointer; flex: none;
}
.theme-btn svg { width: 1.05rem; height: 1.05rem; }
.theme-btn .i-sun { display: none; }
:root[data-theme="dark"] .theme-btn .i-sun { display: block; }
:root[data-theme="dark"] .theme-btn .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-btn .i-sun { display: block; }
  :root:not([data-theme="light"]) .theme-btn .i-moon { display: none; }
}

/* ---------------------------------------------------------------- typography */
h1, h2, h3, h4 { line-height: 1.18; letter-spacing: -.021em; font-weight: 700; text-wrap: balance; }
h1 { font-size: var(--step-4); letter-spacing: -.032em; }
h2 { font-size: var(--step-2); margin-top: 2.6rem; }
h3 { font-size: var(--step-1); margin-top: 1.9rem; }
h4 { font-size: var(--step-0); margin-top: 1.4rem; }


.prose > * + * { margin-top: 1.05rem; }
.prose p { color: var(--ink); }
.prose h2 + *, .prose h3 + *, .prose h4 + * { margin-top: .65rem; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li + li { margin-top: .4rem; }
.prose li::marker { color: var(--ink-3); }
.prose strong { font-weight: 660; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin-block: 2.2rem; }

.anchor {
  opacity: 0; margin-left: .4rem; text-decoration: none; color: var(--ink-3);
  font-weight: 400; font-size: .8em;
}
h2:hover .anchor, h3:hover .anchor, h4:hover .anchor, .anchor:focus { opacity: 1; }

.lede { font-size: var(--step-1); color: var(--ink-2); line-height: 1.5; text-wrap: pretty; }

code { font-family: var(--mono); font-size: .875em; }
:not(pre) > code {
  background: var(--surface-2); border: 1px solid var(--line);
  padding: .08em .34em; border-radius: 4px;
  /* Keep short commands on one line but never let a long token widen the page. */
  white-space: pre-wrap; overflow-wrap: anywhere; word-break: normal;
}
.code-block {
  position: relative; min-width: 0; background: var(--surface-2);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.code-block pre { overflow-x: auto; overscroll-behavior-x: contain; padding: .95rem 1rem; margin: 0; max-width: 100%; }
.code-block code { font-size: .82rem; line-height: 1.6; white-space: pre; }
.code-lang {
  position: absolute; top: 0; right: 0; font-size: .66rem; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-3); padding: .3rem .6rem;
  font-family: var(--mono);
}

blockquote {
  border-left: 3px solid var(--accent); padding-left: 1rem;
  color: var(--ink-2); font-style: italic;
}
blockquote > * + * { margin-top: .7rem; }

figure figcaption { font-size: var(--step--1); color: var(--ink-3); margin-top: .5rem; }

/* ---------------------------------------------------------------- callouts */
.callout {
  border: 1px solid var(--line); border-left-width: 3px;
  background: var(--surface); border-radius: var(--radius-s);
  padding: .9rem 1rem;
}
.callout > * + * { margin-top: .6rem; }
.callout-title {
  font-weight: 680; font-size: var(--step--1); letter-spacing: .01em;
  text-transform: uppercase; letter-spacing: .05em;
}
.callout-note    { border-left-color: var(--info);   background: var(--info-bg); }
.callout-note .callout-title { color: var(--info); }
.callout-tip     { border-left-color: var(--accent); background: var(--accent-bg); }
.callout-tip .callout-title { color: var(--accent-ink); }
.callout-key     { border-left-color: var(--accent); background: var(--accent-bg); }
.callout-key .callout-title { color: var(--accent-ink); }
.callout-warning { border-left-color: var(--warn);   background: var(--warn-bg); }
.callout-warning .callout-title { color: var(--warn); }
.callout-caution { border-left-color: var(--danger); background: var(--danger-bg); }
.callout-caution .callout-title { color: var(--danger); }

/* ---------------------------------------------------------------- tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: var(--step--1); }
th, td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th {
  background: var(--surface-2); font-weight: 650; white-space: nowrap;
  position: sticky; top: 0; font-size: .78rem; text-transform: uppercase; letter-spacing: .05em;
  color: var(--ink-2);
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: color-mix(in srgb, var(--surface-2) 55%, transparent); }
.ta-center { text-align: center; }
.ta-right  { text-align: right; }
td.num, th.num { font-variant-numeric: tabular-nums; text-align: right; }

/* ---------------------------------------------------------------- chips */
.chips { display: flex; flex-wrap: wrap; gap: .4rem; list-style: none; padding: 0; }
.chip {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: .74rem; font-weight: 600; letter-spacing: .015em;
  padding: .22rem .55rem; border-radius: 100px;
  border: 1px solid var(--line-2); background: var(--surface); color: var(--ink-2);
  text-decoration: none; white-space: nowrap;
}
a.chip:hover { border-color: var(--accent); color: var(--accent-ink); }
.chip-accent { background: var(--accent-bg); border-color: transparent; color: var(--accent-ink); }
.chip-warn   { background: var(--warn-bg);   border-color: transparent; color: var(--warn); }
.chip-danger { background: var(--danger-bg); border-color: transparent; color: var(--danger); }
.chip-info   { background: var(--info-bg);   border-color: transparent; color: var(--info); }

/* ---------------------------------------------------------------- page furniture */
.crumbs { font-size: var(--step--1); color: var(--ink-3); padding-top: 1.4rem; }
.crumbs ol { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .35rem; }
.crumbs li::after { content: "/"; margin-left: .35rem; color: var(--line-2); }
.crumbs li:last-child::after { content: ""; }
.crumbs a { color: var(--ink-3); text-decoration: none; }
.crumbs a:hover { color: var(--accent-ink); text-decoration: underline; }

.page-head { padding: 1rem 0 1.6rem; border-bottom: 1px solid var(--line); margin-bottom: 2rem; }
.page-head .lede { margin-top: .8rem; max-width: var(--prose); }
.eyebrow {
  font-size: .74rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent-ink); margin-bottom: .6rem;
}
.eyebrow a { text-decoration: none; color: inherit; }
.eyebrow a:hover { text-decoration: underline; }
.meta-line {
  display: flex; flex-wrap: wrap; gap: .4rem 1rem; margin-top: 1rem;
  font-size: var(--step--1); color: var(--ink-3);
}
.meta-line time { font-variant-numeric: tabular-nums; }

.layout { display: grid; gap: 2.5rem; padding-bottom: 3rem; }
/* Grid and flex children default to min-width:auto, which lets a wide table or
   a long code line push the whole page sideways on a phone. */
.layout > *, .content, .grid > *, .two-col > *, .stat-row > * { min-width: 0; }
.content { max-width: 100%; }
.prose { max-width: min(var(--prose), 100%); }
.table-wrap, .code-block, .result-panel, .tool-wrap, .specs, .callout, .pane { max-width: 100%; }
.specs { grid-template-columns: minmax(6rem, max-content) minmax(0, 1fr); }
@media (min-width: 64rem) {
  .layout-toc { grid-template-columns: minmax(0,1fr) 15rem; }
  .layout-toc > .toc { order: 2; }
  .layout-toc > .content { order: 1; }
}

.toc { font-size: var(--step--1); }
@media (min-width: 64rem) {
  .toc { position: sticky; top: 5rem; align-self: start; max-height: calc(100vh - 7rem); overflow-y: auto; }
}
.toc-title { font-size: .72rem; text-transform: uppercase; letter-spacing: .09em; color: var(--ink-3); font-weight: 700; margin-bottom: .5rem; }
.toc ol { list-style: none; padding: 0; border-left: 1px solid var(--line); }
.toc li a {
  display: block; padding: .3rem 0 .3rem .8rem; margin-left: -1px;
  border-left: 2px solid transparent; color: var(--ink-2); text-decoration: none; line-height: 1.35;
}
.toc li a:hover { color: var(--accent-ink); border-left-color: var(--line-2); }
.toc li a.active { color: var(--accent-ink); border-left-color: var(--accent); font-weight: 600; }
.toc .lvl-3 a { padding-left: 1.6rem; font-size: .93em; color: var(--ink-3); }

/* ---------------------------------------------------------------- cards */
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
@media (min-width: 40rem) { .grid-2, .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 62rem) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

.card {
  display: flex; flex-direction: column; gap: .5rem;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.1rem; text-decoration: none; color: inherit;
  transition: border-color .12s ease, transform .12s ease;
}
a.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card h3, .card h2 { margin: 0; font-size: var(--step-1); letter-spacing: -.018em; }
a.card:hover h3, a.card:hover h2 { color: var(--accent-ink); }
.card p { font-size: var(--step--1); color: var(--ink-2); margin: 0; }
.card-foot { margin-top: auto; padding-top: .5rem; font-size: .76rem; color: var(--ink-3); }

.card-num {
  font-family: var(--mono); font-size: .72rem; color: var(--ink-3);
  letter-spacing: .06em; text-transform: uppercase;
}

/* ---------------------------------------------------------------- spec table */
.specs {
  display: grid; grid-template-columns: max-content 1fr; gap: 0;
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; background: var(--surface); font-size: var(--step--1);
}
.specs dt {
  padding: .55rem .8rem; font-weight: 600; color: var(--ink-2);
  background: var(--surface-2); border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.specs dd {
  padding: .55rem .8rem; margin: 0; border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.specs dt:last-of-type, .specs dd:last-of-type { border-bottom: 0; }

/* ---------------------------------------------------------------- score bar */
.score { display: flex; align-items: center; gap: .45rem; }
.score-pips { display: inline-flex; gap: 3px; }
.score-pip { width: 12px; height: 6px; border-radius: 2px; background: var(--line-2); }
.score-pip.on-1, .score-pip.on-2 { background: var(--accent); }
.score-pip.on-3 { background: #b8860b; }
:root[data-theme="dark"] .score-pip.on-3 { background: #d9a441; }
.score-pip.on-4, .score-pip.on-5 { background: var(--danger); }
.score-label { font-size: .78rem; color: var(--ink-2); font-weight: 600; }

/* ---------------------------------------------------------------- app header */
.app-hero { display: grid; gap: 1.4rem; }
@media (min-width: 58rem) { .app-hero { grid-template-columns: minmax(0,1fr) 20rem; align-items: start; } }

.stat-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: .75rem; }
@media (min-width: 40rem) { .stat-row { grid-template-columns: repeat(4, 1fr); } }
.stat {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-s); padding: .7rem .8rem;
}
.stat-k { font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-3); font-weight: 650; }
.stat-v { font-size: var(--step-1); font-weight: 680; letter-spacing: -.02em; font-variant-numeric: tabular-nums; margin-top: .1rem; }
.stat-n { font-size: .74rem; color: var(--ink-3); line-height: 1.35; margin-top: .15rem; }

/* ---------------------------------------------------------------- lists of links */
.linklist { list-style: none; padding: 0; display: grid; gap: .1rem; }
.linklist a {
  display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
  padding: .6rem .1rem; border-bottom: 1px solid var(--line);
  text-decoration: none; color: var(--ink);
}
.linklist a:hover { color: var(--accent-ink); }
.linklist .ll-note { font-size: var(--step--1); color: var(--ink-3); text-align: right; flex: none; }

/* ---------------------------------------------------------------- FAQ */
.faq { display: grid; gap: .55rem; }
.faq details {
  border: 1px solid var(--line); border-radius: var(--radius-s);
  background: var(--surface); overflow: hidden;
}
.faq summary {
  cursor: pointer; padding: .85rem 1rem; font-weight: 620; list-style: none;
  display: flex; gap: .75rem; align-items: flex-start;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; margin-left: auto; color: var(--ink-3); font-weight: 400;
  font-size: 1.3rem; line-height: 1; flex: none;
}
.faq details[open] summary::after { content: "\2212"; }
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq .faq-body { padding: .9rem 1rem 1.05rem; }
.faq .faq-body > * + * { margin-top: .8rem; }

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  padding: .58rem 1.05rem; border-radius: var(--radius-s); font-weight: 620;
  font-size: var(--step--1); text-decoration: none; cursor: pointer;
  border: 1px solid var(--accent); background: var(--accent); color: var(--on-accent);
}
.btn:hover { filter: brightness(1.08); }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-ink); filter: none; }
.btn-row { display: flex; flex-wrap: wrap; gap: .6rem; }

/* ---------------------------------------------------------------- hero */
.hero {
  padding: 2.4rem 1.1rem; display: grid; gap: 2rem; align-items: center;
  width: 100%; max-width: var(--shell); margin-inline: auto;
}
@media (min-width: 48rem) { .hero { padding: 3.6rem 1.75rem 3.4rem; } }
@media (min-width: 64rem) {
  .hero { grid-template-columns: minmax(0, 1.2fr) minmax(19rem, .8fr); gap: 3.5rem; }
}
.hero h1 { max-width: 18ch; }
.hero .lede { max-width: 48ch; margin-top: 1.1rem; font-size: var(--step-1); }

.index-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); box-shadow: var(--shadow); overflow: hidden;
}
.index-card h2 {
  margin: 0; padding: .7rem 1.1rem; font-size: .74rem; font-weight: 700;
  letter-spacing: .09em; text-transform: uppercase; color: var(--ink-3);
  background: var(--surface-2); border-bottom: 1px solid var(--line);
}
.index-card dl { margin: 0; padding: .4rem 1.1rem .8rem; }
.index-row {
  display: flex; align-items: baseline; gap: .75rem;
  padding: .5rem 0; border-bottom: 1px dotted var(--line);
}
.index-row:last-of-type { border-bottom: 0; }
.index-row dt { font-size: var(--step--1); color: var(--ink-2); flex: 1; }
.index-row dd {
  margin: 0; font-size: var(--step-1); font-weight: 700; letter-spacing: -.02em;
  font-variant-numeric: tabular-nums; color: var(--ink);
}
.index-row dd.accent { color: var(--accent-ink); }
.index-card p {
  margin: 0; padding: .8rem 1.1rem; font-size: .78rem; color: var(--ink-3);
  border-top: 1px solid var(--line); background: var(--surface-2); line-height: 1.5;
}

.section { padding-block: 2.6rem; border-top: 1px solid var(--line); }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: .6rem 1rem; margin-bottom: 1.4rem; }
.section-head h2 { margin: 0; font-size: var(--step-2); }
.section-head p { color: var(--ink-3); font-size: var(--step--1); max-width: 48ch; }
.section-head .more { margin-left: auto; font-size: var(--step--1); font-weight: 600; }

/* ---------------------------------------------------------------- filters / tools */
.filterbar {
  display: grid; gap: .6rem; margin-bottom: 1.4rem;
  padding: .9rem; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
}
@media (min-width: 46rem) { .filterbar { grid-template-columns: 1fr auto auto auto; align-items: end; } }
.field { display: grid; gap: .25rem; }
.field label { font-size: .74rem; font-weight: 650; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); }
input[type="text"], input[type="search"], input[type="number"], select, textarea {
  background: var(--paper); border: 1px solid var(--line-2); border-radius: var(--radius-s);
  padding: .5rem .65rem; width: 100%; font-size: var(--step--1);
}
textarea { font-family: var(--mono); font-size: .82rem; line-height: 1.55; min-height: 9rem; resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible { border-color: var(--accent); }

.checkgrid { display: grid; gap: .4rem; grid-template-columns: 1fr; }
@media (min-width: 40rem) { .checkgrid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 64rem) { .checkgrid { grid-template-columns: repeat(3, 1fr); } }
.checkitem {
  display: flex; gap: .55rem; align-items: flex-start; padding: .45rem .6rem;
  border: 1px solid var(--line); border-radius: var(--radius-s); background: var(--surface);
  cursor: pointer; font-size: var(--step--1); line-height: 1.35;
}
.checkitem:hover { border-color: var(--line-2); }
.checkitem input { margin-top: .2rem; flex: none; accent-color: var(--accent); }
.checkitem.on { border-color: var(--accent); background: var(--accent-bg); }
.checkitem small { display: block; color: var(--ink-3); font-size: .74rem; }

.tool-wrap { max-width: 62rem; }
.tool-wrap > * + * { margin-top: 1.2rem; }
.tool-wrap .result-panel:first-child { margin-top: 0; }
.pick-group { border-top: 1px solid var(--line); }
.pick-group:first-of-type { border-top: 0; }
.pick-group > summary {
  cursor: pointer; padding: .55rem .1rem; list-style: none;
  display: flex; gap: .5rem; align-items: center; font-size: var(--step--1);
}
.pick-group > summary::-webkit-details-marker { display: none; }
.pick-group > summary::before {
  content: "+"; width: 1rem; color: var(--ink-3); font-weight: 400; flex: none;
}
.pick-group[open] > summary::before { content: "\2212"; }
.pick-group > summary:hover { color: var(--accent-ink); }

.result-panel {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); padding: 1.1rem; margin-top: 1.2rem;
}
.result-panel > * + * { margin-top: .9rem; }
.tool-note { font-size: var(--step--1); color: var(--ink-3); }

/* ---------------------------------------------------------------- charts */
.bars { display: grid; gap: .45rem; font-size: var(--step--1); }
.bar-row { display: grid; grid-template-columns: minmax(5rem, 11rem) minmax(0, 1fr) auto; gap: .6rem; align-items: center; }
.bar-track { background: var(--surface-2); border-radius: 3px; height: .85rem; overflow: hidden; border: 1px solid var(--line); }
.bar-fill { height: 100%; background: var(--accent); border-radius: 2px 0 0 2px; }
.bar-val { font-variant-numeric: tabular-nums; color: var(--ink-2); font-weight: 600; min-width: 3.2rem; text-align: right; }
.bar-lab { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; }

/* ---------------------------------------------------------------- verdict box */
.verdict {
  border: 1px solid var(--accent); border-left-width: 4px;
  background: var(--accent-bg); border-radius: var(--radius-s); padding: 1rem 1.1rem;
}
.verdict h2, .verdict h3 { margin: 0 0 .5rem; font-size: var(--step-1); color: var(--accent-ink); }
.verdict > p + p { margin-top: .7rem; }

.two-col { display: grid; gap: 1rem; }
@media (min-width: 44rem) { .two-col { grid-template-columns: 1fr 1fr; } }
.pane { border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; background: var(--surface); }
.pane h3 { margin: 0 0 .6rem; font-size: var(--step-0); }
.pane ul { padding-left: 1.15rem; margin: 0; font-size: var(--step--1); }
.pane li + li { margin-top: .4rem; }
.pane-good { border-left: 3px solid var(--accent); }
.pane-bad  { border-left: 3px solid var(--danger); }

.gotcha { border-top: 1px solid var(--line); padding-top: 1rem; }
.gotcha h3 { margin: 0 0 .35rem; font-size: var(--step-0); }
.gotcha p { font-size: var(--step--1); color: var(--ink-2); margin: 0; }

/* ---------------------------------------------------------------- sources */
.sources { font-size: var(--step--1); }
.sources ol { padding-left: 1.2rem; }
.sources li { margin-top: .35rem; color: var(--ink-2); }
.sources a { word-break: break-word; }

/* ---------------------------------------------------------------- footer */
.site-foot {
  border-top: 1px solid var(--line); background: var(--surface);
  padding-block: 2.4rem 2rem; margin-top: 3rem; font-size: var(--step--1);
}
.foot-grid { display: grid; gap: 1.6rem; }
@media (min-width: 46rem) { .foot-grid { grid-template-columns: 1.4fr repeat(3, 1fr); } }
.foot-grid h2 { font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); margin: 0 0 .6rem; }
.foot-grid ul { list-style: none; padding: 0; display: grid; gap: .35rem; }
.foot-grid a { color: var(--ink-2); text-decoration: none; }
.foot-grid a:hover { color: var(--accent-ink); text-decoration: underline; }
.foot-note { margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid var(--line); color: var(--ink-3); max-width: 62ch; }

/* ---------------------------------------------------------------- utilities */
.vh {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.muted { color: var(--ink-3); }
.small { font-size: var(--step--1); }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: .8rem; }
.mt-2 { margin-top: 1.6rem; }
.mt-3 { margin-top: 2.4rem; }
.nowrap { white-space: nowrap; }
.stack > * + * { margin-top: 1rem; }
.stack-s > * + * { margin-top: .55rem; }
.stack-l > * + * { margin-top: 1.8rem; }
[hidden] { display: none !important; }

.updated-note {
  font-size: var(--step--1); color: var(--ink-3); border-top: 1px solid var(--line);
  padding-top: 1rem; margin-top: 2.4rem;
}

.related { border-top: 1px solid var(--line); padding-top: 1.6rem; margin-top: 2.4rem; }
.related h2 { margin-top: 0; font-size: var(--step-1); }

@media print {
  .masthead, .site-foot, .toc, .nav-toggle, .theme-btn { display: none !important; }
  body { background: #fff; color: #000; }
  a { text-decoration: underline; }
}