/* best-ai-seo-software.com - "Impeccable" dark editorial theme.
   Shared Impeccable DNA (near-black canvas, thin condensed display type, restraint),
   with a site-distinct VIOLET accent (no footprint: each sibling site uses a different accent). */

:root {
  color-scheme: dark;
  --bg: #09090c;
  --surface: #111116;
  --surface-2: #17171e;
  --line: #262630;
  --line-soft: #1c1c24;
  --text: #e8e7ec;
  --muted: #9c9ba7;
  --faint: #6b6a77;
  /* site accent = violet */
  --accent: #a78bfa;
  --accent-strong: #8b5cf6;
  --accent-ink: #0a0812;
  --accent-weak: #1a1530;
  --amber: #e0a63c;
  --amber-weak: #251c0d;
  --ok: #4ade80;
  --warn: #fbbf24;
  --bad: #f87171;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow: 0 1px 2px rgba(0,0,0,.5), 0 12px 34px rgba(0,0,0,.45);
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --ring: 0 0 0 3px color-mix(in srgb, var(--accent) 40%, transparent);
  --maxw: 1160px;
  --header-h: 66px;
  --font-sans: "Albert Sans", "Avenir Next", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-display: "Alumni Sans", "Albert Sans", "Arial Narrow", Arial, sans-serif;
  --step--1: .85rem;
  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: 1.4rem;
  --step-3: 1.85rem;
  --step-4: 2.4rem;
  --display: clamp(2.8rem, 7vw, 5.5rem);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);color:var(--text);background:var(--bg);line-height:1.6;font-size:var(--step-0);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{color:#fff}
/* display headings: condensed, light, large, tight (the Impeccable signature) */
h1,h2,h3,h4{color:#fff;font-family:var(--font-display);font-weight:400;line-height:1.02;letter-spacing:-.01em;text-wrap:balance}
h1{font-size:var(--display);font-weight:300;margin:0 0 .35em}
h2{font-size:var(--step-4);font-weight:400;margin:2em 0 .5em}
h3{font-size:var(--step-2);font-weight:500;margin:1.5em 0 .35em}
/* body copy stays in the geometric sans, not the display face */
p{margin:0 0 1.05em;text-wrap:pretty;font-family:var(--font-sans)}
.lead,.muted,.byline,.pill,.chip,.crumbs,table.data,.faq,.note,.disclosure,.answer,.hero-trust,.rank-body p,.card p,footer{font-family:var(--font-sans)}
ul,ol{margin:0 0 1.05em;padding-left:1.25em}
li{margin:.3em 0}
strong{color:#fff;font-weight:600}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}

.container{max-width:var(--maxw);margin-inline:auto;padding-inline:22px}
.narrow{max-width:min(100%,70ch)}
.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:.72rem;font-weight:700;color:var(--accent);margin:0 0 1rem;font-family:var(--font-sans)}
.lead{font-size:var(--step-1);color:var(--muted);line-height:1.55}
.muted{color:var(--muted)}
.center{text-align:center}

.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-ink);padding:10px 16px;z-index:200}
.skip:focus{left:0}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:4px}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line-soft)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:var(--header-h)}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;color:#fff;font-size:1.02rem;letter-spacing:.01em}
.brand:hover{color:#fff}
.brand .mark{width:28px;height:28px;flex:none}
.nav-links{display:flex;align-items:center;gap:22px;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--muted);font-weight:500;font-size:.93rem}
.nav-links a:hover{color:#fff}
.nav-cta{background:var(--accent);color:var(--accent-ink) !important;padding:9px 16px;border-radius:var(--radius-sm);font-weight:600}
.nav-cta:hover{background:#fff}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--radius-sm);padding:8px;cursor:pointer;color:var(--text)}
.nav-toggle svg{width:22px;height:22px;display:block}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-links{position:absolute;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:stretch;background:var(--surface);border-bottom:1px solid var(--line);padding:12px 22px 20px;gap:2px;box-shadow:var(--shadow);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 4px;border-bottom:1px solid var(--line-soft)}
  .nav-cta{text-align:center;margin-top:8px}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:1rem;padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:transform .12s ease,background .15s ease,color .15s ease,border-color .15s ease;line-height:1.3;font-family:var(--font-sans)}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{background:#fff;color:#000}
.btn-amber{background:var(--amber);color:#1a1305}
.btn-amber:hover{background:#fff;color:#000}
.btn-ghost{background:transparent;color:#fff;border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:#fff}
.btn-lg{padding:15px 28px;font-size:1.05rem}

/* hero: flat dark canvas, restraint, a single thin accent rule */
.hero{background:var(--bg);color:var(--text);padding:88px 0 70px;position:relative;border-bottom:1px solid var(--line-soft)}
.hero::before{content:"";position:absolute;left:0;top:0;height:2px;width:120px;background:var(--accent)}
.hero .container{position:relative;z-index:1}
.hero h1{color:#fff;max-width:20ch}
.hero .lead{color:var(--muted);max-width:60ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-trust{display:flex;flex-wrap:wrap;gap:26px;margin-top:34px;color:var(--faint);font-size:.85rem;text-transform:uppercase;letter-spacing:.08em}
.hero-trust span{display:inline-flex;align-items:center;gap:8px}

/* sections */
section{padding:8px 0}
.section-pad{padding:60px 0}
.section-alt{background:var(--surface);border-block:1px solid var(--line-soft)}
.section-head{max-width:760px;margin:0 auto 40px;text-align:center}
.section-head h2{margin-top:0}

/* grid + cards */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:900px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.grid-2,.grid-3{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{margin-top:0}
.card-link{display:block;color:inherit;transition:border-color .15s ease,background .15s ease,transform .12s ease}
.card-link:hover{text-decoration:none;border-color:var(--accent);background:var(--surface-2);transform:translateY(-2px)}

/* ranking rows */
.stack-list{content-visibility:auto;contain-intrinsic-size:auto 240px}
.rank{display:flex;gap:18px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}
.rank.top{border-color:var(--accent);background:linear-gradient(180deg,var(--accent-weak),var(--surface))}
.rank.top::before{content:"Top pick";position:absolute;top:-10px;left:22px;background:var(--accent);color:var(--accent-ink);font-size:.66rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:3px 10px;border-radius:999px}
.rank-badge{flex:none;width:46px;height:46px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:400;font-size:1.7rem;background:var(--surface-2);color:var(--accent);border:1px solid var(--line)}
.rank.top .rank-badge{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.rank-body{flex:1;min-width:0}
.rank-body h3{margin:0 0 4px}
.rank-name-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.pill{display:inline-flex;align-items:center;gap:5px;font-size:.72rem;font-weight:600;padding:3px 9px;border-radius:999px;background:var(--surface-2);color:var(--muted);border:1px solid var(--line)}
.pill-top{background:var(--amber-weak);color:var(--amber);border-color:transparent}
.pill-yes{background:color-mix(in srgb,var(--ok) 15%,transparent);color:var(--ok);border-color:transparent}
.pill-no{background:var(--surface-2);color:var(--faint)}
.pill-part{background:var(--amber-weak);color:var(--warn);border-color:transparent}
.pros-cons{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:12px}
@media (max-width:560px){.pros-cons{grid-template-columns:1fr}}
.pros-cons ul{margin:.2rem 0 0;padding-left:1.05em;font-size:.93rem;color:var(--muted)}
.pros-cons .pros li::marker{color:var(--ok)}
.pros-cons .cons li::marker{color:var(--warn)}
.pros-cons h4{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;margin:0;color:var(--faint);font-family:var(--font-sans);font-weight:700}

/* tables */
.table-wrap{overflow-x:auto;margin:1.5rem 0;border:1px solid var(--line);border-radius:var(--radius);position:relative;background:var(--surface)}
table.data{border-collapse:separate;border-spacing:0;width:100%;min-width:640px;font-size:.94rem}
table.data th,table.data td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--muted)}
table.data thead th{position:sticky;top:0;z-index:2;background:var(--surface-2);color:#fff;font-weight:600;font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;font-family:var(--font-sans)}
table.data tbody th[scope=row],table.data tbody td:first-child{position:sticky;left:0;background:var(--surface);z-index:1}
table.data thead th:first-child{z-index:3}
table.data tbody tr:last-child td,table.data tbody tr:last-child th{border-bottom:0}
table.data tbody tr:hover td,table.data tbody tr:hover th[scope=row]{background:var(--surface-2)}
table.data .best{color:#fff;font-weight:600}
table.data th.sortable button{all:unset;cursor:pointer;display:inline-flex;align-items:center;gap:6px;color:inherit;font:inherit}
table.data th.sortable button::after{content:"\2195";opacity:.5}
table.data th[aria-sort=ascending] button::after{content:"\2191";opacity:1}
table.data th[aria-sort=descending] button::after{content:"\2193";opacity:1}

/* answer-first + notes */
.answer{background:var(--accent-weak);border-left:2px solid var(--accent);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:16px 20px;margin:0 0 1.4rem}
.answer p{margin:0;color:var(--text)}
.note{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 18px;font-size:.92rem;color:var(--muted)}
.disclosure{background:var(--amber-weak);border:1px solid color-mix(in srgb,var(--amber) 35%,transparent);border-radius:var(--radius);padding:14px 18px;font-size:.9rem;color:#e6cf9a}
.disclosure strong{color:#f4e2b6}

/* faq */
.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:10px;background:var(--surface)}
.faq summary{cursor:pointer;padding:15px 20px;font-weight:600;color:#fff;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--accent);line-height:1;flex:none}
.faq details[open] summary::after{content:"\2013"}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq .faq-body{padding:6px 20px 18px;color:var(--muted)}
.faq .faq-body p:last-child{margin-bottom:0}

/* prose */
.prose{font-size:1.05rem;color:var(--text)}
.prose h2{border-top:1px solid var(--line);padding-top:1.7rem;scroll-margin-top:calc(var(--header-h) + 12px)}
.prose h3{scroll-margin-top:calc(var(--header-h) + 12px)}
.prose p{color:var(--muted)}
.prose ul li::marker{color:var(--accent)}
.prose ul li{color:var(--muted)}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:2px;text-decoration-color:color-mix(in srgb,var(--accent) 45%,transparent)}
.prose a:hover{color:#fff;text-decoration-color:#fff}

.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin:1.5rem 0 2rem}
.toc strong{display:block;margin-bottom:8px;font-size:.72rem;text-transform:uppercase;letter-spacing:.09em;color:var(--faint);font-family:var(--font-sans)}
.toc ol{margin:0;padding-left:1.2em}
.toc a{color:var(--muted)}
.toc a.active{color:var(--accent);font-weight:600}

/* blog article two-column layout with sticky TOC */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:38px;align-items:start}
@media (min-width:1040px){
  .article-grid{grid-template-columns:minmax(0,1fr) 250px}
  .article-grid .toc.sidebar{position:sticky;top:calc(var(--header-h) + 18px);margin:0;max-height:calc(100vh - var(--header-h) - 40px);overflow:auto}
  .article-grid .toc.sidebar ol{padding-left:1.1em;font-size:.9rem}
  .article-grid .toc.sidebar li{margin:.5em 0}
}
.article-grid .toc.sidebar{order:2}
@media (max-width:1039px){.article-grid .toc.sidebar{display:none}}
.article-cover{border-radius:var(--radius);margin:0 0 1.5rem;border:1px solid var(--line)}
.byline{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.9rem;margin:0 0 1.6rem}
.byline .av{width:42px;height:42px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:inline-flex;align-items:center;justify-content:center;font-weight:600;font-family:var(--font-display);font-size:1.2rem;flex:none}

/* breadcrumbs */
.crumbs{font-size:.82rem;color:var(--faint);padding:20px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.crumbs li::after{content:"/";margin-left:6px;color:var(--line)}
.crumbs li:last-child::after{content:""}
.crumbs a{color:var(--faint)}
.crumbs a:hover{color:var(--muted)}

/* cta band */
.cta-band{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:48px;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;left:50%;top:0;transform:translateX(-50%);height:2px;width:120px;background:var(--accent)}
.cta-band h2{color:#fff;margin-top:0}
.cta-band p{color:var(--muted);max-width:56ch;margin-inline:auto}

/* footer */
.site-footer{background:var(--bg);color:var(--muted);padding:56px 0 30px;margin-top:70px;font-size:.9rem;border-top:1px solid var(--line-soft)}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:#fff}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
@media (max-width:780px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.footer-grid{grid-template-columns:1fr}}
.site-footer h4{color:#fff;font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 14px;font-family:var(--font-sans);font-weight:700}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:8px 0}
.footer-brand .brand{color:#fff;margin-bottom:12px}
.footer-brand p{max-width:36ch}
.footer-bottom{border-top:1px solid var(--line-soft);margin-top:36px;padding-top:20px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:.82rem;color:var(--faint)}

.stack>*+*{margin-top:1rem}
.mb-0{margin-bottom:0}.mt-0{margin-top:0}
.tags{display:flex;flex-wrap:wrap;gap:6px}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}