/* The Energy Audit Co — shared styles for /guides/ (SEO article hub). Mirrors the homepage brand. */
:root{
  --ink:#06232A;--ink-2:#0C3640;--teal:#0E8C84;--teal-bright:#19B3A6;--blue:#1E6CA8;
  --green:#2BB673;--mist:#EEF4F5;--surface:#FFFFFF;--line:#D3E0E3;--muted:#4E6A72;
  --display:"Space Grotesk",system-ui,sans-serif;--body:"Inter",system-ui,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;--maxw:1140px;--readw:720px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--mist);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.15;letter-spacing:-.02em;margin:0}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.read{max-width:var(--readw);margin:0 auto;padding:0 24px}
.eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--teal)}
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--body);font-weight:600;font-size:15px;padding:13px 22px;border-radius:9px;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .2s ease}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px -10px rgba(6,35,42,.5);text-decoration:none}
.btn-light{background:var(--teal-bright);color:#03222a}
.btn-light:hover{transform:translateY(-2px);text-decoration:none}

/* nav (mirrors homepage) */
header.nav{position:sticky;top:0;z-index:50;background:rgba(238,244,245,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-family:var(--display);font-weight:600;font-size:18px;letter-spacing:-.02em;color:var(--ink)}
.logo:hover{text-decoration:none}
.logo .co{color:var(--teal)}
nav.links{display:flex;gap:30px;align-items:center}
nav.links a{font-size:14.5px;color:var(--muted);font-weight:500}
nav.links a:hover{color:var(--ink);text-decoration:none}
@media(max-width:820px){nav.links{display:none}}

/* article */
.article{background:var(--surface);border-bottom:1px solid var(--line)}
.article-head{padding:52px 0 8px}
.breadcrumb{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.04em;margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.article h1{font-size:40px;margin:12px 0 0;max-width:16ch}
.article .dek{font-size:20px;color:var(--ink-2);margin:20px 0 0;max-width:40ch}
.article .meta{font-family:var(--mono);font-size:12.5px;color:var(--muted);margin:22px 0 0;display:flex;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:18px}
.prose{padding:14px 0 40px;font-size:17.5px}
.prose p{margin:20px 0}
.prose h2{font-size:26px;margin:40px 0 0}
.prose h3{font-size:20px;margin:30px 0 0}
.prose ul,.prose ol{margin:18px 0;padding-left:22px}
.prose li{margin:9px 0}
.prose strong{color:var(--ink)}
.prose blockquote{margin:26px 0;padding:16px 22px;border-left:3px solid var(--teal);background:var(--mist);border-radius:0 10px 10px 0;color:var(--ink-2)}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15.5px}
.prose th,.prose td{border:1px solid var(--line);padding:11px 13px;text-align:left}
.prose th{background:var(--mist);font-family:var(--display);font-weight:600}
.callout{margin:28px 0;padding:18px 20px;border:1px solid var(--line);border-radius:12px;background:var(--mist);font-size:15px;color:var(--ink-2)}
.callout b{color:var(--ink)}
@media(max-width:560px){.article h1{font-size:30px}.prose{font-size:16.5px}}

/* CTA box */
.cta-box{margin:40px 0 8px;background:var(--ink);color:#dff1f0;border-radius:16px;padding:30px}
.cta-box h3{color:#fff;font-size:23px}
.cta-box p{margin:12px 0 20px;color:#bfdedb;font-size:16px}

/* guides index */
.hub{padding:56px 0}
.hub-head{max-width:60ch;margin-bottom:36px}
.hub-head h1{font-size:40px;margin:12px 0 0}
.hub-head p{color:var(--muted);font-size:18px;margin:14px 0 0}
.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.gcard{display:block;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:24px;color:var(--ink)}
.gcard:hover{border-color:var(--teal);transform:translateY(-2px);text-decoration:none;box-shadow:0 16px 40px -26px rgba(6,35,42,.5);transition:transform .15s ease,box-shadow .2s ease,border-color .2s ease}
.gcard .k{font-family:var(--mono);font-size:11px;color:var(--teal);letter-spacing:.08em;text-transform:uppercase}
.gcard h2{font-size:20px;margin:12px 0 8px}
.gcard p{margin:0;color:var(--muted);font-size:15px}
@media(max-width:720px){.guide-grid{grid-template-columns:1fr}}

/* footer (mirrors homepage) */
footer{background:var(--ink);color:#9cc2bf;padding:46px 0;font-size:13.5px}
footer .wrap{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
footer .logo{color:#fff;font-size:16px;margin-bottom:12px}
footer a{color:#9cc2bf}footer a:hover{color:#fff}
footer .disc{max-width:46ch;line-height:1.6;font-family:var(--mono);font-size:11.5px;color:#6f9794}