/* Material Lab theme — Yabopower site (lifepo4batterypack.com preview) */
:root{--graphite:#23272b;--green:#3f7d4e;--amber:#e8a33d;--paper:#f7f5f0;--ink:#3a3f44;--line:#d8d2c4}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.65}
a{color:var(--green)}
@media (hover:hover){a:hover{color:#2c5c37}.main-nav a:hover{border-bottom-color:var(--amber)}.cta-button:hover{background:#2c5c37;color:#fff}}
.cta-button:active{transform:scale(.97)}
.site-header{background:var(--graphite);color:#fff;padding:14px 20px;display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.site-logo{height:44px;width:auto}
.brand-name{font-family:Georgia,serif;font-size:22px;font-weight:700;letter-spacing:.5px}
.brand-tag{font-size:13px;color:#c9c2b2}
.main-nav{display:flex;gap:14px;flex-wrap:wrap;margin-left:auto}
.main-nav a{color:#fff;text-decoration:none;font-size:15px;padding:8px 10px;border-bottom:2px solid transparent}
.main-nav a.active{border-bottom-color:var(--amber);font-weight:700}
.page-wrap{max-width:860px;margin:0 auto;padding:24px 20px 48px}
.hero{background:#fff;border:1px solid var(--line);border-top:6px solid var(--green);padding:28px 26px;margin-bottom:22px}
.hero h1{font-family:Georgia,serif;font-size:32px;line-height:1.25;margin:0 0 12px;color:var(--graphite)}
.hero-lead{font-size:18px;margin:0 0 14px}
.evidence-strip{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0;padding:0;list-style:none}
.evidence-item{background:#eef4ee;border:1px solid #cfe0cf;padding:8px 12px;font-size:14px}
.evidence-note{font-size:14px;color:#5a5244}
.cell-strip{display:flex;gap:4px;margin:18px 0}
.cell-block{flex:1;height:14px;background:var(--green);border:1px solid #2c5c37}
.cell-block.alt{background:var(--amber);border-color:#b97f22}
.cell-block.dark{background:var(--graphite);border-color:#111}
.figure{margin:22px 0;background:#fff;border:1px solid var(--line);padding:12px}
.figure img{max-width:100%;height:auto;display:block;margin:0 auto}
.figure-caption{font-size:14px;color:#5a5244;margin-top:8px}
.figure-caption.real{border-left:4px solid var(--green);padding-left:10px}
.figure-caption.generic{border-left:4px solid var(--amber);padding-left:10px}
.section{background:#fff;border:1px solid var(--line);padding:22px 24px;margin-bottom:18px}
.section h2{font-family:Georgia,serif;font-size:23px;color:var(--graphite);margin:0 0 10px}
.section h3{font-size:18px;color:var(--graphite);margin:18px 0 6px}
.spec-table{width:100%;border-collapse:collapse;margin:12px 0;font-size:15px}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.spec-table th{background:#eef4ee;width:38%}
.spec-label{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;position:relative;padding-top:12px}
.spec-label::before,.spec-label::after{content:"";position:absolute;top:2px;width:10px;height:6px;background:var(--graphite)}
.spec-label::before{left:10px}
.spec-label::after{right:10px}
.bullet-list{margin:8px 0;padding-left:22px}
.bullet-list li{margin-bottom:6px}
.callout{background:#fdf6e3;border:1px solid var(--amber);padding:14px 16px;margin:16px 0}
.callout strong{color:var(--graphite)}
.warning-box{background:#fdf0ec;border:1px solid #d98a7a;padding:14px 16px;margin:16px 0}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.cta-button{display:inline-block;background:var(--green);color:#fff;text-decoration:none;padding:11px 20px;font-weight:700;border-radius:2px}
.cta-secondary{display:inline-block;border:2px solid var(--green);color:var(--green);text-decoration:none;padding:9px 18px;font-weight:700;border-radius:2px}
.related-list{margin:8px 0;padding-left:22px}
.related-list li{margin-bottom:5px}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:16px 0}
.card-grid > *{min-width: 0}
.card{background:#fff;border:1px solid var(--line);padding:16px}
.card h3{margin-top:0}
.card p{font-size:15px}
.form-field{margin-bottom:14px}
.form-field label{display:block;font-weight:700;margin-bottom:4px}
.form-field input,.form-field textarea,.form-field select{width:100%;padding:10px;border:1px solid var(--line);font-size:16px;font-family:inherit}
.form-field textarea{min-height:140px}
.form-note{font-size:14px;color:#5a5244}
.hidden-honeypot{display:none}
.site-footer{background:var(--graphite);color:#d8d2c4;padding:26px 20px;font-size:14px}
.site-footer a{color:#fff}
.footer-inner{max-width:860px;margin:0 auto}
.footer-cols{display:flex;gap:28px;flex-wrap:wrap}
.notfound{text-align:center;padding:60px 20px}
.notfound h1{font-family:Georgia,serif;font-size:40px}
@media (max-width:700px){
  .hero h1{font-size:26px}
  .card-grid{grid-template-columns:1fr}
  .spec-table th{width:45%}
  .main-nav{margin-left:0}
}
/* LANG-STYLE-START */
.lang-switcher{position:relative;margin-left:auto;align-self:center}.lang-switcher>a{color:#fff;text-decoration:none;font-size:15px;padding:8px 10px;border-bottom:2px solid transparent;display:inline-block}.lang-switcher:hover>a{border-bottom-color:var(--amber)}.lang-dropmenu{display:none;position:absolute;right:0;top:100%;background:#23272b;min-width:160px;z-index:50;box-shadow:0 4px 12px rgba(0,0,0,.3)}.lang-switcher:hover .lang-dropmenu{display:block}.lang-dropmenu a{display:block;color:#fff;text-decoration:none;font-size:15px;padding:8px 12px;border-bottom:1px solid #3a3f44}.lang-dropmenu a:hover{background:#3f7d4e}.lang-switcher-404{margin:16px}.lang-switcher-404 .lang-switcher{margin-left:0}.lang-switcher-404 .lang-switcher>a{color:#23272b}.lang-switcher-404 .lang-dropmenu a{color:#fff}
/* LANG-STYLE-END */