/* ==========================================================
   Stack Gratis - hoja de estilos unica, sin dependencias
   ========================================================== */

:root {
  --bg: #f6f8f4;
  --bg-alt: #edf2ea;
  --surface: #ffffff;
  --text: #101a15;
  --muted: #55645c;
  --line: #dde5dc;
  --accent: #15803d;
  --accent-strong: #14532d;
  --accent-soft: #e6f6eb;
  --accent-line: #b7e4c7;
  --ink: #0b1220;
  --good-bg: #f0fdf4;
  --good-line: #bbf7d0;
  --bad-bg: #fff8ed;
  --bad-line: #fed7aa;
  --radius: 16px;
  --radius-sm: 10px;
  --max: 1120px;
  --shadow: 0 1px 2px rgba(16, 26, 21, .05), 0 12px 32px -18px rgba(16, 26, 21, .28);
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}

[data-theme="dark"] {
  --bg: #080d12;
  --bg-alt: #0e161d;
  --surface: #111b23;
  --text: #e9f0ec;
  --muted: #a0b1a8;
  --line: #22323c;
  --accent: #4ade80;
  --accent-strong: #86efac;
  --accent-soft: #10291b;
  --accent-line: #1d5135;
  --ink: #05090d;
  --good-bg: #0c2417;
  --good-line: #1c5135;
  --bad-bg: #291b0d;
  --bad-line: #5a3a17;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 18px 40px -22px rgba(0, 0, 0, .8);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #080d12;
    --bg-alt: #0e161d;
    --surface: #111b23;
    --text: #e9f0ec;
    --muted: #a0b1a8;
    --line: #22323c;
    --accent: #4ade80;
    --accent-strong: #86efac;
    --accent-soft: #10291b;
    --accent-line: #1d5135;
    --ink: #05090d;
    --good-bg: #0c2417;
    --good-line: #1c5135;
    --bad-bg: #291b0d;
    --bad-line: #5a3a17;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 18px 40px -22px rgba(0, 0, 0, .8);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

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

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

img, svg { max-width: 100%; height: auto; }
a { color: var(--accent-strong); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }
h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); letter-spacing: -.035em; }
h2 { font-size: clamp(1.55rem, 3vw, 2.1rem); }
h3 { font-size: 1.18rem; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.25em; }
li { margin-bottom: .45em; }
strong { font-weight: 700; }
code { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: .9em; background: var(--bg-alt); padding: .1em .35em; border-radius: 5px; }

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

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.wrap.narrow, .narrow { max-width: 800px; margin-left: auto; margin-right: auto; }

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

.skip-link {
  position: absolute; left: 16px; top: -80px; z-index: 100;
  background: var(--ink); color: #fff; padding: 12px 18px; border-radius: 10px;
  font-weight: 600; text-decoration: none; transition: top .15s ease;
}
.skip-link:focus { top: 12px; color: #fff; }

/* ---------- Cabecera ---------- */

.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
@supports not (background: color-mix(in srgb, red 50%, blue)) {
  .site-header { background: var(--bg); }
}
.header-inner { display: flex; align-items: center; gap: 22px; min-height: 68px; position: relative; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 800; letter-spacing: -.03em; font-size: 1.12rem; }
.brand svg { color: var(--accent); flex: 0 0 auto; }
.brand:hover { color: var(--text); }
.accent { color: var(--accent); }

.nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 11px; border-radius: 9px; text-decoration: none;
  color: var(--muted); font-size: .92rem; font-weight: 550;
}
.nav a:hover { color: var(--text); background: var(--bg-alt); }
.nav a.is-active { color: var(--text); background: var(--bg-alt); }
.nav-search { border: 1px solid var(--line); }

.icon-btn {
  width: 38px; height: 38px; flex: 0 0 auto;
  display: inline-grid; place-items: center;
  border: 1px solid transparent; background: transparent; color: var(--muted);
  border-radius: 10px; cursor: pointer; padding: 0;
}
.icon-btn:hover { background: var(--bg-alt); color: var(--text); }
.menu-btn { display: none; }
.ico-sun { display: none; }
[data-theme="dark"] .ico-sun { display: block; }
[data-theme="dark"] .ico-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .ico-sun { display: block; }
  :root:not([data-theme="light"]) .ico-moon { display: none; }
}

/* ---------- Hero ---------- */

.hero {
  padding: 84px 0 64px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(55rem 28rem at 85% -20%, rgba(34, 197, 94, .17), transparent 62%),
    radial-gradient(38rem 22rem at -5% 115%, rgba(34, 197, 94, .10), transparent 60%);
}
.hero-inner { max-width: 940px; }
.hero h1 { max-width: 19ch; margin-bottom: .35em; }
.hero-sub { font-size: 1.12rem; color: var(--muted); max-width: 62ch; margin-bottom: 1.7em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }
.trust { display: flex; flex-wrap: wrap; gap: 10px 22px; list-style: none; padding: 0; margin: 0; font-size: .88rem; color: var(--muted); }
.trust li { margin: 0; display: flex; align-items: center; gap: 7px; }
.trust li::before { content: "\2713"; color: var(--accent); font-weight: 800; }

.eyebrow {
  margin: 0 0 12px; font-size: .74rem; font-weight: 800;
  letter-spacing: .13em; text-transform: uppercase; color: var(--accent);
}
.eyebrow a { color: inherit; }

/* ---------- Botones ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: .78rem 1.2rem; border-radius: 11px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  font: inherit; font-weight: 650; font-size: .95rem; text-decoration: none;
  cursor: pointer; transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.btn:hover { border-color: var(--accent); color: var(--text); transform: translateY(-1px); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #04140a; }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: #04140a; }
[data-theme="dark"] .btn-primary { color: #04140a; }
.btn-block { width: 100%; margin-top: 6px; }

.text-link { font-weight: 650; text-decoration: none; white-space: nowrap; }
.text-link:hover { text-decoration: underline; }

/* ---------- Secciones ---------- */

.section { padding: 68px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
.section-head h2 { margin-bottom: 0; max-width: 30ch; }
.section-sub { color: var(--muted); max-width: 72ch; margin: .5em 0 0; }
.cat-section { border-top: 1px solid var(--line); }
.cat-section:first-child { border-top: 0; }
.cat-section:last-child { padding-bottom: 20px; }

.stats-band { background: var(--ink); color: #f1f5f9; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding-top: 26px; padding-bottom: 26px; }
.stats strong { display: block; font-size: 1.7rem; letter-spacing: -.03em; color: #fff; }
.stats span { font-size: .82rem; color: #94a3b8; }

/* ---------- Tarjetas y rejillas ---------- */

.grid { display: grid; gap: 18px; }
.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; text-decoration: none; color: var(--text);
  transition: transform .14s ease, border-color .14s ease, box-shadow .14s ease;
}
.card:hover { transform: translateY(-2px); border-color: var(--accent-line); box-shadow: var(--shadow); }
.card h2, .card h3 { font-size: 1.13rem; margin-bottom: .45em; }
.card h2 a, .card h3 a { color: var(--text); text-decoration: none; }
.card h2 a:hover, .card h3 a:hover { color: var(--accent); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.card-desc { color: var(--muted); font-size: .93rem; margin-bottom: 1em; }
.card-meta { margin: 0; padding-top: 12px; border-top: 1px solid var(--line); font-size: .8rem; color: var(--muted); line-height: 1.5; }
.meta-label { color: var(--accent); font-weight: 700; }
.card-link { margin-top: auto; padding-top: 14px; font-size: .88rem; font-weight: 700; color: var(--accent); text-decoration: none; }
.card-link:hover { text-decoration: underline; }
.card-date { font-size: .78rem; color: var(--muted); }
.card-guide { border-top: 3px solid var(--accent-line); }

.badge {
  display: inline-flex; align-items: center;
  background: var(--accent-soft); color: var(--accent-strong);
  border: 1px solid var(--accent-line);
  font-size: .7rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 9px; border-radius: 999px;
}
.badge-alt { background: var(--bg-alt); color: var(--muted); border-color: var(--line); }

.cat-tile {
  display: flex; flex-direction: column; gap: 6px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; text-decoration: none; color: var(--text); min-height: 190px;
  transition: transform .14s ease, border-color .14s ease;
}
.cat-tile:hover { transform: translateY(-2px); border-color: var(--accent-line); }
.cat-tile h3 { font-size: 1.08rem; margin: 0; }
.cat-tile p { color: var(--muted); font-size: .88rem; margin: 0; }
.cat-num { font-size: .78rem; font-weight: 800; color: var(--accent); letter-spacing: .08em; }
.cat-count { margin-top: auto; padding-top: 14px; font-size: .82rem; font-weight: 700; color: var(--accent); }

.method-strip {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 24px;
  padding: 38px;
}
.method-copy h2 { max-width: 18ch; }
.method-copy p { color: var(--muted); }
.method-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 16px; }
.method-list li { margin: 0; padding-left: 18px; border-left: 3px solid var(--accent-line); color: var(--muted); font-size: .92rem; }
.method-list strong { display: block; color: var(--text); margin-bottom: 3px; }

/* ---------- Cabeceras de pagina ---------- */

.page-head { padding: 44px 0 30px; }
.page-head-tight { padding-top: 0; }
.page-head h1 { max-width: 26ch; }
.lede { font-size: 1.1rem; color: var(--muted); max-width: 66ch; margin-bottom: 1.4em; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.byline { font-size: .86rem; color: var(--muted); }
.byline a { color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.tag {
  display: inline-flex; align-items: center;
  background: var(--bg-alt); border: 1px solid var(--line); color: var(--muted);
  border-radius: 999px; padding: 5px 11px; font-size: .78rem; font-weight: 650;
  text-decoration: none;
}
.tag:hover { color: var(--accent); border-color: var(--accent-line); }

.crumbs { margin-bottom: 22px; }
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; list-style: none; padding: 0; margin: 0; font-size: .8rem; color: var(--muted); }
.crumbs li { margin: 0; display: inline-flex; align-items: center; gap: 7px; }
.crumbs li + li::before { content: "\203A"; color: var(--muted); opacity: .7; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); text-decoration: underline; }
.crumbs [aria-current="page"] { color: var(--text); font-weight: 600; }

.jump-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.jump-nav a {
  font-size: .82rem; font-weight: 650; color: var(--muted); text-decoration: none;
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; background: var(--surface);
}
.jump-nav a:hover { color: var(--accent); border-color: var(--accent-line); }

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

.page { padding-bottom: 60px; }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 318px; gap: 48px; align-items: start; }
.layout-article { grid-template-columns: minmax(0, 1fr) 300px; }
.sidebar { position: sticky; top: 88px; }
.side-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.side-card h2 { font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.facts { display: grid; grid-template-columns: 1fr; gap: 0; margin: 0 0 14px; }
.facts dt { font-size: .74rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); margin-top: 12px; }
.facts dt:first-child { margin-top: 0; }
.facts dd { margin: 2px 0 0; font-size: .9rem; font-weight: 600; overflow-wrap: anywhere; }
.facts dd a { color: var(--text); text-decoration: none; }
.facts dd a:hover { color: var(--accent); text-decoration: underline; }
.link-list { list-style: none; padding: 0; margin: 0; }
.link-list li { margin: 0; border-top: 1px solid var(--line); }
.link-list li:first-child { border-top: 0; }
.link-list a { display: block; padding: 9px 0; font-size: .9rem; color: var(--text); text-decoration: none; }
.link-list a:hover { color: var(--accent); }
.pill-list { display: flex; flex-direction: column; gap: 8px; }
.pill-link { display: block; padding: 10px 12px; border-radius: var(--radius-sm); background: var(--bg-alt); color: var(--text); text-decoration: none; font-size: .86rem; font-weight: 600; }
.pill-link:hover { color: var(--accent); }

/* ---------- Prosa ---------- */

.prose { font-size: 1.02rem; line-height: 1.78; max-width: 70ch; }
.prose-wide { max-width: none; }
.prose > p, .prose-section > p { color: var(--text); }
.prose h2 { margin: 2.1em 0 .55em; font-size: clamp(1.4rem, 2.4vw, 1.75rem); }
.prose h3 { margin: 1.7em 0 .5em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: .5em; }
.prose a { font-weight: 550; }
.prose .lead { font-size: 1.14rem; color: var(--text); }
.prose-section { scroll-margin-top: 90px; }
.prose code { overflow-wrap: anywhere; }
.fine { font-size: .8rem; color: var(--muted); line-height: 1.55; }

.callout {
  background: var(--accent-soft); border: 1px solid var(--accent-line); border-left: 5px solid var(--accent);
  border-radius: var(--radius-sm); padding: 20px 22px; margin: 28px 0;
}
.callout h2 { margin: 0 0 .5em; font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-strong); }
.callout p:last-child { margin-bottom: 0; }

.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 28px 0; }
.pc { padding: 20px; border-radius: 14px; }
.pc h3 { font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; margin-bottom: .7em; }
.pc ul { margin: 0; padding-left: 1.15em; }
.pc li { font-size: .92rem; }
.pc-good { background: var(--good-bg); border: 1px solid var(--good-line); }
.pc-good h3 { color: var(--accent-strong); }
.pc-bad { background: var(--bad-bg); border: 1px solid var(--bad-line); }
.pc-bad h3 { color: #b45309; }
[data-theme="dark"] .pc-bad h3 { color: #fbbf24; }

.verdict { background: var(--ink); color: #e2e8f0; border-radius: 18px; padding: 28px 30px; margin: 8px 0 28px; }
.verdict p { margin: 0; font-size: 1.05rem; }
.verdict .eyebrow { color: #4ade80; margin-bottom: 8px; }

.when-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 30px 0; }
.when-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.when-card h2 { font-size: 1.2rem; }
.when-card p { color: var(--muted); font-size: .94rem; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); margin: 26px 0; }
.cmp-table { width: 100%; border-collapse: collapse; min-width: 720px; font-size: .9rem; }
.cmp-table th, .cmp-table td { padding: 15px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.cmp-table thead th { background: var(--bg-alt); font-size: .84rem; letter-spacing: .02em; }
.cmp-table tbody th { width: 18%; font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; }
.cmp-table tbody tr:last-child th, .cmp-table tbody tr:last-child td { border-bottom: 0; }
.cmp-table td { color: var(--text); }

.faq { margin: 8px 0 20px; border-top: 1px solid var(--line); }
.qa { border-bottom: 1px solid var(--line); }
.qa summary {
  cursor: pointer; padding: 18px 30px 18px 0; position: relative;
  font-weight: 650; list-style: none; color: var(--text);
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; position: absolute; right: 2px; top: 50%; transform: translateY(-50%); font-size: 1.3rem; font-weight: 400; color: var(--accent); }
.qa[open] summary::after { content: "\2212"; }
.qa-body p { margin: 0 0 18px; color: var(--muted); font-size: .94rem; }

.author-box { display: flex; gap: 16px; align-items: flex-start; background: var(--bg-alt); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 36px 0 0; }
.author-avatar { width: 48px; height: 48px; flex: 0 0 auto; border-radius: 50%; background: var(--accent); color: #04140a; display: grid; place-items: center; font-weight: 800; font-size: .95rem; }
.author-name { margin: 0 0 4px; font-weight: 750; }
.author-box p { margin: 0 0 6px; font-size: .87rem; color: var(--muted); }
.author-box p:last-child { margin-bottom: 0; }

.side-toc .toc { list-style: none; padding: 0; margin: 0; counter-reset: toc; }
.toc li { margin: 0; border-top: 1px solid var(--line); }
.toc li:first-child { border-top: 0; }
.toc a { display: block; padding: 8px 0; font-size: .86rem; color: var(--muted); text-decoration: none; line-height: 1.4; }
.toc a:hover { color: var(--accent); }

.related-block { margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--line); }
.related-block h2 { font-size: 1.2rem; }
.related-block .link-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 24px; }
.related-block .link-list li { border-top: 1px solid var(--line); }

.start-list { counter-reset: start; list-style: none; padding: 0; }
.start-list li { counter-increment: start; padding: 16px 0 16px 46px; border-top: 1px solid var(--line); position: relative; margin: 0; }
.start-list li::before {
  content: counter(start); position: absolute; left: 0; top: 16px;
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent-strong);
  display: grid; place-items: center; font-size: .82rem; font-weight: 800;
}
.start-list a { display: block; font-weight: 650; text-decoration: none; }
.start-list span { display: block; color: var(--muted); font-size: .88rem; margin-top: 3px; }

/* ---------- Buscador ---------- */

.search-form { margin: 26px 0 8px; }
.search-form input {
  width: 100%; padding: 16px 18px; font: inherit; font-size: 1.05rem;
  color: var(--text); background: var(--surface);
  border: 1px solid var(--line); border-radius: 12px;
}
.search-form input::placeholder { color: var(--muted); opacity: .8; }
.search-hint { display: block; margin-top: 8px; font-size: .78rem; color: var(--muted); }
.search-status { min-height: 1.4em; font-size: .85rem; color: var(--muted); margin: 10px 0 18px; }
.search-result { display: block; text-decoration: none; }
.search-result .badge { margin-bottom: 8px; }
.popular { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); }

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

.site-footer { background: var(--ink); color: #cbd5e1; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; padding: 52px 24px 34px; }
.footer-brand .brand { color: #fff; font-size: 1.2rem; }
.footer-brand p { color: #94a3b8; font-size: .88rem; max-width: 34ch; }
.footer-brand .fine { font-size: .76rem; color: #64748b; }
.footer-col h2 { font-size: .74rem; text-transform: uppercase; letter-spacing: .12em; color: #94a3b8; margin-bottom: 14px; }
.footer-col a { display: block; color: #cbd5e1; text-decoration: none; font-size: .86rem; padding: 4px 0; }
.footer-col a:hover { color: #4ade80; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; border-top: 1px solid #1e293b; padding: 18px 24px 26px; }
.footer-bottom p { margin: 0; font-size: .76rem; color: #64748b; }

/* ---------- 404 ---------- */

.error-page { padding: 80px 0 60px; }
.error-links { margin-top: 44px; }
.error-links .card { min-height: 0; }

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .layout, .layout-article { grid-template-columns: 1fr; gap: 34px; }
  .sidebar { position: static; }
  .method-strip { grid-template-columns: 1fr; gap: 26px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .menu-btn { display: grid; }
  .nav {
    display: none; position: absolute; top: calc(100% + 1px); left: -24px; right: -24px;
    background: var(--surface); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 2px; padding: 12px 24px 16px;
    box-shadow: var(--shadow);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 11px 12px; font-size: .95rem; }
  .nav-search { border: 0; }
  .hero { padding: 56px 0 44px; }
  .section { padding: 48px 0; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .pros-cons, .when-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; padding-top: 40px; }
  .footer-brand { grid-column: 1 / -1; }
  .related-block .link-list { grid-template-columns: 1fr; }
  .page-head h1, .hero h1 { max-width: none; }
  .method-strip { padding: 26px; }
}

@media (max-width: 480px) {
  .wrap { padding: 0 18px; }
  .header-inner { gap: 12px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .card:hover, .cat-tile:hover, .btn:hover { transform: none; }
}

@media print {
  .site-header, .site-footer, .sidebar, .hero-actions, .skip-link { display: none !important; }
  body { background: #fff; color: #000; }
  .layout, .prose { max-width: none; }
  a { color: #000; text-decoration: underline; }
}