/* Vivaflow — shared styles for every page.
   Dark-only brand: warm near-black, one copper accent (the trade material
   behind plumbing/HVAC work), Fraunces display / Manrope body / JetBrains
   Mono for labels and numbers. */
:root{
  --bg:#0e0c0a;
  --bg-raised:#181410;
  --bg-card:#1b1712;
  --fg:#f5efe4;
  --muted:#a89c8b;
  --muted-2:#786a5a;
  --line:#2a2319;
  --accent:#cd7f42;
  --accent-bright:#f2b06a;
  --display:'Fraunces',Georgia,'Times New Roman',serif;
  --body:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;
  color-scheme:dark;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--body);line-height:1.55;-webkit-font-smoothing:antialiased}
::selection{background:var(--accent);color:#140f0a}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;text-wrap:balance;margin:0;letter-spacing:-0.01em}
p{margin:0}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent-bright);outline-offset:3px;border-radius:6px}

.wrap{max-width:1160px;margin:0 auto;padding-inline:24px}
section{padding-block:clamp(72px,10vw,132px)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted-2)}
.lede{max-width:600px;color:var(--muted);font-size:clamp(16.5px,1.6vw,19px)}
.micro{margin-top:16px;font-size:13px;color:var(--muted-2)}
.num{font-family:var(--mono);color:var(--accent);font-size:13px}
.h2{font-size:clamp(28px,4vw,46px);margin-top:10px;max-width:760px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:var(--body);font-weight:700;font-size:15px;
     padding:15px 28px;border-radius:999px;border:1px solid transparent;cursor:pointer;text-decoration:none;
     transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--accent);color:#170f07}
.btn-primary:hover{box-shadow:0 0 0 5px color-mix(in srgb, var(--accent) 22%, transparent)}
.btn-ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent)}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}

/* grain overlay for a premium, non-flat dark surface */
.grain{position:fixed;inset:0;pointer-events:none;z-index:999;opacity:.035;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* header / nav */
.site-header{position:sticky;top:0;z-index:40;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  background:color-mix(in srgb, var(--bg) 72%, transparent);border-bottom:1px solid var(--line)}
.site-nav{display:flex;align-items:center;justify-content:space-between;padding-block:18px;gap:20px}
.logo{font-family:var(--display);font-weight:600;font-size:19px;letter-spacing:-0.01em;text-decoration:none}
.logo span{color:var(--accent)}
.navlinks{display:flex;gap:30px;align-items:center;font-size:14px;color:var(--muted)}
.navlinks a{text-decoration:none}
.navlinks a:hover,.navlinks a[aria-current="page"]{color:var(--fg)}
.navlinks .btn{padding:11px 22px;font-size:14px;color:#170f07}
@media (max-width:820px){.navlinks a:not(.btn){display:none}}

/* faq */
details{border-bottom:1px solid var(--line);padding-block:20px}
summary{cursor:pointer;list-style:none;font-family:var(--display);font-size:19px;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-family:var(--mono);color:var(--accent);font-size:20px;flex:none}
details[open] summary::after{content:"–"}
details p{margin-top:14px;color:var(--muted);max-width:70ch}

/* footer */
.site-footer{border-top:1px solid var(--line);padding-block:40px}
.foot-row{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;color:var(--muted);font-size:13px}
.foot-links{display:flex;gap:22px;flex-wrap:wrap}
.foot-links a{text-decoration:none}
.foot-links a:hover{color:var(--fg)}