/* ============================================================
   AnyWaste — Battery Passport sub-page stylesheet
   Shared across the four knowledge-base articles under
   /battery-passport/. Mirrors the design tokens and typography
   conventions used in the main index.html so the sub-pages
   inherit the AnyWaste look without duplicating the entire
   primary stylesheet.
   ============================================================ */

:root{
  --teal:#2BB5A0;
  --teal2:#28B3BD;
  --teal-dark:#1d9183;
  --teal-light:#e8f9f6;
  --green:#36b046;
  --orange:#BD5D3A;
  --orange-dark:#9e4a2c;
  --navy:#1A2E2A;
  --navy-mid:#2F4A45;
  --white:#FFFFFF;
  --off-white:#f5faf9;
  --grey:#6b8a84;
  --text:#1A2E2A;
  --text-light:#4d7068;
  --border:#c8e6e0;
  --shadow-sm:0 2px 8px rgba(26,26,46,0.08);
  --shadow-md:0 8px 32px rgba(26,26,46,0.12);
  --shadow-lg:0 20px 60px rgba(26,26,46,0.18);
  --shadow-teal:0 8px 32px rgba(43,181,160,0.25);
  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --transition:0.3s cubic-bezier(0.4,0,0.2,1);
  --font-head:'Montserrat',sans-serif;
  --font-body:'Source Sans 3',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font-body);font-size:16px;line-height:1.7;color:var(--text);background:var(--white);overflow-x:hidden;}
h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:700;line-height:1.2;color:var(--navy);}
h1{font-size:clamp(1.9rem,4.5vw,3.1rem);font-weight:800;}
h2{font-size:clamp(1.5rem,3vw,2.2rem);}
h3{font-size:clamp(1.1rem,2vw,1.4rem);}
h4{font-size:1rem;}
p{color:var(--text-light);line-height:1.75;}
a{color:var(--teal-dark);text-decoration:none;}
a:hover{color:var(--teal);}
.container{max-width:1100px;margin:0 auto;padding:0 24px;}
.container-narrow{max-width:880px;margin:0 auto;padding:0 24px;}
.section{padding:72px 0;}
.section-sm{padding:48px 0;}
.section-alt{background:var(--off-white);}

/* ─── Slim nav ─────────────────────────────────────────────── */
.sub-nav{position:sticky;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1.5px solid var(--border);}
.sub-nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:1280px;margin:0 auto;gap:24px;}
.sub-nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--navy);}
.sub-nav-logo .logo-mark{width:34px;height:34px;background:linear-gradient(135deg,#2BB5A0,#36b046);border-radius:7px;display:flex;align-items:center;justify-content:center;font-family:var(--font-head);font-weight:900;font-size:.85rem;color:#fff;}
.sub-nav-logo .logo-word{font-family:var(--font-head);font-weight:800;font-size:1rem;color:var(--navy);}
.sub-nav-logo .logo-word .accent{color:var(--teal);}
.sub-nav-links{display:flex;align-items:center;gap:6px;}
.sub-nav-links a{padding:7px 11px;color:var(--text-light);font-family:var(--font-head);font-weight:600;font-size:.78rem;letter-spacing:.04em;text-transform:uppercase;border-radius:4px;transition:all var(--transition);}
.sub-nav-links a:hover,.sub-nav-links a.active{color:var(--teal);background:var(--teal-light);}
.sub-nav-cta{display:flex;align-items:center;gap:10px;}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:var(--radius-sm);font-family:var(--font-head);font-weight:600;font-size:.85rem;letter-spacing:.02em;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:all var(--transition);}
.btn-primary{background:var(--orange);color:#fff;border-color:var(--orange);}
.btn-primary:hover{background:var(--orange-dark);color:#fff;}
.btn-outline{background:transparent;color:var(--teal);border-color:var(--teal);}
.btn-outline:hover{background:var(--teal);color:#fff;}
.btn-sm{padding:9px 18px;font-size:.8rem;}
.btn-lg{padding:14px 28px;font-size:.95rem;}

/* ─── Breadcrumb ───────────────────────────────────────────── */
.bc-wrap{background:var(--off-white);border-bottom:1px solid var(--border);padding:18px 0;}
.breadcrumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:.82rem;color:var(--text-light);font-family:var(--font-head);font-weight:500;}
.breadcrumbs a{color:var(--teal-dark);}
.breadcrumbs a:hover{color:var(--teal);}
.breadcrumbs .bc-sep{color:var(--border);}
.breadcrumbs .bc-current{color:var(--navy);font-weight:600;}

/* ─── Hero ─────────────────────────────────────────────────── */
.sub-hero{background:var(--navy);padding:80px 0 64px;position:relative;overflow:hidden;}
.sub-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 60% 60% at 75% 45%,rgba(43,181,160,.10) 0%,transparent 60%);}
.sub-hero-inner{position:relative;z-index:2;max-width:820px;margin:0 auto;padding:0 24px;}
.sub-hero h1{color:#fff;margin-top:14px;}
.sub-hero p.sub-hero-lead{color:rgba(255,255,255,.78);font-size:1.05rem;line-height:1.7;margin-top:18px;max-width:680px;}
.sub-hero .back-link{display:inline-flex;align-items:center;gap:6px;color:var(--teal);font-family:var(--font-head);font-weight:600;font-size:.85rem;margin-top:24px;}
.sub-hero .back-link:hover{color:#fff;}

/* ─── Labels ───────────────────────────────────────────────── */
.label{display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:20px;font-family:var(--font-head);font-weight:700;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;}
.label-teal{background:var(--teal-light);color:var(--teal-dark);}
.label-white{background:rgba(255,255,255,.15);color:rgba(255,255,255,.9);}
.label-orange{background:rgba(189,93,58,.12);color:var(--orange);}

/* ─── Body sections ────────────────────────────────────────── */
.body-section{padding:56px 0;border-bottom:1px solid var(--border);}
.body-section:last-of-type{border-bottom:none;}
.body-section .body-eyebrow{font-family:var(--font-head);font-weight:700;text-transform:uppercase;font-size:.72rem;letter-spacing:.1em;color:var(--teal-dark);margin-bottom:8px;}
.body-section h2{margin-bottom:18px;}
.body-section p{font-size:1rem;line-height:1.8;color:var(--text-light);margin-top:14px;}
.body-section p:first-of-type{margin-top:0;}

/* ─── Placeholder block ────────────────────────────────────── */
.placeholder-block{background:var(--off-white);border:1px dashed var(--border);border-left:3px solid var(--teal);border-radius:var(--radius-sm);padding:18px 22px;margin-top:14px;font-size:.92rem;color:var(--text-light);line-height:1.7;}
.placeholder-block strong{color:var(--navy);font-family:var(--font-head);font-weight:700;text-transform:uppercase;font-size:.72rem;letter-spacing:.08em;display:block;margin-bottom:6px;}

/* ─── FAQ list ─────────────────────────────────────────────── */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-list details{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:16px 20px;box-shadow:var(--shadow-sm);}
.faq-list summary{font-family:var(--font-head);font-weight:700;color:var(--navy);cursor:pointer;font-size:.95rem;list-style:none;}
.faq-list summary::-webkit-details-marker{display:none;}
.faq-list summary::after{content:"+";float:right;color:var(--teal);font-family:var(--font-head);font-weight:700;font-size:1.1rem;}
.faq-list details[open] summary::after{content:"−";}
.faq-list details p{margin-top:10px;color:var(--text-light);font-size:.92rem;line-height:1.7;}

/* ─── Related block ────────────────────────────────────────── */
.related-block{background:var(--off-white);padding:56px 0;}
.related-block .related-eyebrow{font-family:var(--font-head);font-weight:700;text-transform:uppercase;font-size:.72rem;letter-spacing:.1em;color:var(--teal-dark);text-align:center;margin-bottom:8px;}
.related-block h2{text-align:center;margin-bottom:32px;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.related-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:22px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:8px;transition:all var(--transition);}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--teal);}
.related-card .related-card-eyebrow{font-family:var(--font-head);font-weight:700;text-transform:uppercase;font-size:.65rem;letter-spacing:.08em;color:var(--teal-dark);}
.related-card h3{font-size:1.05rem;color:var(--navy);}
.related-card p{font-size:.86rem;color:var(--text-light);margin:0;}
.related-card .related-card-arrow{margin-top:auto;color:var(--teal);font-family:var(--font-head);font-weight:700;font-size:.85rem;}

/* ─── CTA band ─────────────────────────────────────────────── */
.cta-band{background:var(--orange);padding:56px 0;text-align:center;color:#fff;}
.cta-band h2{color:#fff;}
.cta-band p{color:rgba(255,255,255,.88);max-width:560px;margin:14px auto 24px;}
.cta-band .cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.cta-band .btn-on-orange{background:#fff;color:var(--orange);border-color:#fff;font-family:var(--font-head);font-weight:700;}
.cta-band .btn-on-orange:hover{background:rgba(255,255,255,.92);}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.1);}

/* ─── Disclaimer ───────────────────────────────────────────── */
.sub-disclaimer{background:#f0f9f7;border:1px solid var(--border);border-left:4px solid var(--teal-dark);border-radius:var(--radius-sm);padding:16px 20px;margin:32px 0 0;font-size:.83rem;color:var(--text-light);line-height:1.7;}
.sub-disclaimer strong{color:var(--navy);font-family:var(--font-head);font-weight:700;}

/* ─── Footer ───────────────────────────────────────────────── */
footer{background:var(--navy);color:rgba(255,255,255,.7);padding:56px 0 28px;}
footer h5{color:#fff;font-family:var(--font-head);font-weight:700;font-size:.85rem;letter-spacing:.04em;text-transform:uppercase;margin-bottom:16px;}
footer a{color:rgba(255,255,255,.7);display:block;padding:4px 0;font-size:.86rem;}
footer a:hover{color:var(--teal);}
footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:36px;margin-bottom:32px;}
footer .footer-brand p{color:rgba(255,255,255,.6);font-size:.88rem;}
footer .footer-disclaimer{background:rgba(43,181,160,0.06);border-top:1px solid rgba(43,181,160,0.15);padding:16px 0;margin-top:24px;}
footer .footer-disclaimer p{font-size:.72rem;color:rgba(255,255,255,.45);line-height:1.6;margin:0;text-align:center;}
footer .footer-legal{font-size:.78rem;color:rgba(255,255,255,.4);text-align:center;display:block;margin-top:18px;}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width:880px){
  .sub-nav-links{display:none;}
  .related-grid{grid-template-columns:1fr;}
  footer .footer-grid{grid-template-columns:1fr 1fr;gap:24px;}
}
@media (max-width:560px){
  .sub-hero{padding:56px 0 44px;}
  .body-section{padding:40px 0;}
  footer .footer-grid{grid-template-columns:1fr;}
}