/* ai-accounting-tools — design v4 (Web Studio, 2026)
   Framer-class void-black + full light theme toggle, brand logos, logo marquee, per-brand accents. */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --void:#000000; --surface:#090909; --white:#ffffff; --silver:#a6a6a6; --muted:#8a8a8a;
  --blue:#0099ff; --blue-bright:#58B8FF;
  --line:rgba(255,255,255,.08); --nav-bg:rgba(0,0,0,.72); --nav-hover:rgba(255,255,255,.08);
  --glass-hi:rgba(255,255,255,.04); --glass-lo:rgba(255,255,255,.012); --edge-b:rgba(255,255,255,.05);
  --btn-border:rgba(255,255,255,.22); --row-hover:rgba(255,255,255,.03);
  --divider-hi:rgba(255,255,255,.14); --divider-lo:rgba(255,255,255,.02);
  --aura:rgba(0,153,255,.22); --aura-2:rgba(0,153,255,.10);
  --logo-ring:0 0 0 1px rgba(255,255,255,.14);
  --shadow-soft:rgba(0,153,255,.16);
}
[data-theme="light"]{
  --void:#ffffff; --surface:#ffffff; --white:#0F172A; --silver:#55617A; --muted:#5B6675;
  --blue:#0072E5; --blue-bright:#0066CC;
  --line:rgba(15,23,42,.10); --nav-bg:rgba(255,255,255,.78); --nav-hover:rgba(15,23,42,.07);
  --glass-hi:rgba(15,23,42,.035); --glass-lo:rgba(15,23,42,.012); --edge-b:rgba(15,23,42,.05);
  --btn-border:rgba(15,23,42,.28); --row-hover:rgba(15,23,42,.035);
  --divider-hi:rgba(15,23,42,.14); --divider-lo:rgba(15,23,42,.02);
  --aura:rgba(0,153,255,.12); --aura-2:rgba(0,153,255,.05);
  --logo-ring:0 0 0 1px rgba(15,23,42,.10);
  --shadow-soft:rgba(0,153,255,.14);
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;background:var(--void);color:var(--white);
  line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  transition:background .3s ease,color .3s ease}
::selection{background:rgba(0,153,255,.35)}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
/* Nav — floating frosted */
.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;justify-content:space-between;align-items:center;padding-top:14px;padding-bottom:14px}
.brand{color:var(--white);font-weight:700;text-decoration:none;font-size:16px;letter-spacing:-.01em}
.brand::before{content:"●";color:var(--blue);margin-right:8px;font-size:10px;vertical-align:middle}
.nav nav{display:flex;align-items:center}
.nav nav a{color:var(--silver);text-decoration:none;margin-left:8px;font-size:14.5px;padding:8px 14px;border-radius:9999px;transition:background .15s,color .15s}
.nav nav a:hover{background:var(--nav-hover);color:var(--white)}
.theme-toggle{background:var(--glass-hi);border:1px solid var(--line);border-radius:9999px;width:38px;height:38px;
  cursor:pointer;margin-left:10px;display:inline-flex;align-items:center;justify-content:center;transition:background .15s}
.theme-toggle::before{content:"☀️";font-size:15px;line-height:1}
[data-theme="light"] .theme-toggle::before{content:"🌙"}
.theme-toggle:hover{background:var(--nav-hover)}
/* Hero — void + blue aura */
main{padding-bottom:48px}
.hero{position:relative;padding:96px 0 72px;text-align:center;
  background:radial-gradient(900px 480px at 50% -16%,var(--aura),transparent 62%),
  radial-gradient(520px 300px at 82% -10%,var(--aura-2),transparent 60%)}
h1{font-size:clamp(30px,4.5vw,48px);font-weight:500;letter-spacing:-.03em;line-height:1.05;color:var(--white);
  margin:0 0 20px;text-wrap:balance}
.hero h1{font-size:clamp(38px,6.6vw,78px);letter-spacing:-.045em;line-height:.98}
.lede{font-size:clamp(16px,1.6vw,18px);color:var(--silver);max-width:640px;margin:0 auto 34px;line-height:1.55}
.hero-cta{display:inline-flex;align-items:center;gap:8px;background:var(--white);color:#000;text-decoration:none;
  font-weight:600;font-size:15px;padding:14px 30px;border-radius:9999px;transition:opacity .15s,transform .15s}
.hero-cta:hover{opacity:.85;transform:translateY(-1px)}
.hero-meta{display:flex;justify-content:center;gap:34px;margin-top:34px;color:var(--silver);font-size:14px;flex-wrap:wrap}
.hero-meta span{display:inline-flex;align-items:baseline;gap:6px}
.hero-meta b{color:var(--white);font-size:15px}
/* Logo marquee */
.marquee{max-width:1080px;margin:0 auto 56px;overflow:hidden;padding:6px 0;
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}
.marquee-track{display:flex;align-items:center;gap:64px;width:max-content;animation:scroll 38s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes scroll{to{transform:translateX(-50%)}}
.marquee-item{display:flex;align-items:center;gap:11px;color:var(--silver);font-weight:600;font-size:15px;white-space:nowrap}
.marquee-item b{font-weight:600}
/* Logo tiles (white chip so brand marks read correctly in both themes) */
.logo{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;
  background:#fff;box-shadow:var(--logo-ring);flex:none}
.logo img{width:26px;height:26px;object-fit:contain}
.marquee-item .logo{width:36px;height:36px;border-radius:10px}
.marquee-item .logo img{width:20px;height:20px}
/* Cards — layered glass, per-brand accent */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;margin:0 0 44px}
.card{background:linear-gradient(180deg,var(--glass-hi),var(--glass-lo)) padding-box,
  linear-gradient(135deg,rgba(0,153,255,.45),var(--edge-b) 45%,rgba(0,153,255,.15)) border-box;
  border:1px solid transparent;border-radius:14px;padding:26px;display:flex;flex-direction:column;gap:13px;
  box-shadow:inset 0 0 26px rgba(0,153,255,.04);transition:transform .18s,box-shadow .18s}
.card:hover{transform:translateY(-3px);box-shadow:inset 0 0 32px rgba(0,153,255,.06),
  color-mix(in srgb,var(--accent,#0099ff) 18%,transparent) 0 18px 52px}
.card-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.rank{display:inline-block;background:color-mix(in srgb,var(--accent,#0099ff) 13%,transparent);
  border:1px solid color-mix(in srgb,var(--accent,#0099ff) 40%,transparent);
  color:color-mix(in srgb,var(--accent,#0099ff) 75%,var(--white));
  font-size:12px;font-weight:600;padding:5px 13px;border-radius:9999px;width:fit-content;letter-spacing:.02em}
.card h3{font-size:21px;font-weight:600;letter-spacing:-.015em}
.card p{font-size:15px;color:var(--silver);flex:1}
.cta{display:block;text-align:center;background:transparent;color:var(--white);text-decoration:none;font-weight:600;
  font-size:14.5px;padding:12px 18px;border-radius:9999px;border:1px solid var(--btn-border);transition:border-color .15s,color .15s,box-shadow .15s}
.cta:hover{border-color:color-mix(in srgb,var(--accent,#0099ff) 65%,transparent);color:color-mix(in srgb,var(--accent,#0099ff) 70%,var(--white));box-shadow:0 0 22px color-mix(in srgb,var(--accent,#0099ff) 18%,transparent)}
/* Sections */
section{margin:0 0 48px}
h2{font-size:clamp(24px,3vw,30px);font-weight:600;letter-spacing:-.02em;margin:0 0 16px}
.method{background:var(--surface);box-shadow:var(--logo-ring);border-radius:18px;padding:38px;margin-bottom:48px}
.method h2{color:var(--white)}
.method p{color:var(--silver);font-size:15.5px}
ul{margin:8px 0 8px 22px}
li{margin:6px 0}
a{color:var(--blue-bright)}
/* Brand bar (article pages) */
.brand-bar{display:flex;align-items:center;gap:12px;margin:34px 0 6px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.brand-bar .logo{width:40px;height:40px;border-radius:10px}
.brand-bar .logo img{width:22px;height:22px}
.brand-name{font-weight:600;color:var(--white);font-size:15px}
/* Comparison list — logo rows, fading dividers */
section ul{list-style:none;margin:0}
section ul li{padding:16px 2px;position:relative}
section ul li::after{content:"";position:absolute;left:2px;right:2px;bottom:0;height:1px;
  background:linear-gradient(90deg,var(--divider-hi),var(--divider-lo) 70%,transparent)}
section ul li a{color:var(--white);text-decoration:none;font-weight:500;display:flex;align-items:center;gap:12px;transition:color .15s}
section ul li a .row-title{flex:1;text-align:left}
section ul li a::after{content:"→";color:var(--blue);font-weight:600;flex:none}
section ul li a:hover{color:var(--blue-bright)}
section ul li:hover{background:var(--row-hover);border-radius:10px}
.row-logo{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:7px;
  background:#fff;box-shadow:var(--logo-ring);flex:none}
.row-logo img{width:15px;height:15px;object-fit:contain}
/* Footer */
footer{border-top:1px solid var(--line)}
.disc{font-size:12.5px;color:var(--muted);margin:26px 0 46px;max-width:720px;line-height:1.7}
/* Reveal micro-animation */
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.card,.method,.hero h1,.hero .lede,.hero-cta,.hero-meta,.marquee{animation:fadeUp .55s ease both}
.hero .lede{animation-delay:.06s}.hero-cta{animation-delay:.12s}.hero-meta{animation-delay:.18s}.marquee{animation-delay:.24s}
@media(max-width:600px){.nav nav a{padding:6px 10px;margin-left:4px}.hero{padding:64px 0 56px}.grid{grid-template-columns:1fr}.hero-meta{gap:20px}.marquee-track{gap:40px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}