/* Smart Cards blog. Same tokens as /corporate-nfc-business-cards/. Shape rule: buttons 10px, panels 16px. */
:root{
  --bg:#f5f7f6; --bg-2:#ecf0ee; --panel:#ffffff; --ink:#0e1714; --ink-2:#3d4a45; --mute:#5f6d67;
  --line:rgba(14,23,20,.10); --line-2:rgba(14,23,20,.16);
  --acc:#12884a; --acc-ink:#ffffff; --acc-soft:rgba(18,136,74,.10);
  --shadow:0 1px 0 rgba(14,23,20,.04), 0 20px 50px -24px rgba(16,60,40,.28);
  --f-head:'Sora',system-ui,sans-serif; --f-body:'Geist',system-ui,-apple-system,'Segoe UI',sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0b100e; --bg-2:#111815; --panel:#141c19; --ink:#e9efec; --ink-2:#b9c6c0; --mute:#8d9b95;
    --line:rgba(233,239,236,.09); --line-2:rgba(233,239,236,.16);
    --acc:#2fbf72; --acc-ink:#05140c; --acc-soft:rgba(47,191,114,.12);
    --shadow:0 1px 0 rgba(255,255,255,.03), 0 24px 60px -28px rgba(0,0,0,.7);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0b100e; --bg-2:#111815; --panel:#141c19; --ink:#e9efec; --ink-2:#b9c6c0; --mute:#8d9b95;
  --line:rgba(233,239,236,.09); --line-2:rgba(233,239,236,.16);
  --acc:#2fbf72; --acc-ink:#05140c; --acc-soft:rgba(47,191,114,.12);
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font:400 18px/1.7 var(--f-body);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px;border-radius:4px}
h1,h2,h3{font-family:var(--f-head);font-weight:700;letter-spacing:-.025em;line-height:1.12;text-wrap:balance}
.wrap{width:min(1240px,100% - 32px);margin-inline:auto}

.nav{position:sticky;top:0;z-index:20;background:color-mix(in oklab,var(--bg) 82%,transparent);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font:700 1.02rem/1 var(--f-head);text-decoration:none;letter-spacing:-.02em}
.brand img{width:30px;height:30px;border-radius:8px}
.nav ul{display:flex;gap:24px;list-style:none;margin-left:auto;font-size:.94rem}
.nav ul a{text-decoration:none;color:var(--ink-2)}
.nav ul a:hover,.nav ul a[aria-current]{color:var(--ink)}
@media (max-width:760px){.nav ul{display:none}.nav .btn{margin-left:auto}}

.btn{display:inline-flex;align-items:center;gap:.5em;white-space:nowrap;border-radius:10px;padding:.8em 1.2em;font:600 .95rem/1 var(--f-body);text-decoration:none;border:1px solid transparent;transition:transform .2s cubic-bezier(.16,1,.3,1),background .2s}
.btn:active{transform:translateY(1px)}
.btn-acc{background:var(--acc);color:var(--acc-ink)}
.btn-acc:hover{background:color-mix(in oklab,var(--acc) 88%,var(--ink))}
.btn-line{border-color:var(--line-2)}

/* Article */
.crumbs{font-size:.88rem;color:var(--mute);padding:28px 0 0}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px;opacity:.6}
.crumbs a{text-decoration:none}
.crumbs a:hover{color:var(--ink)}
.post-head{padding:28px 0 36px;max-width:860px}
.post-head h1{font-size:clamp(2rem,4.4vw,3.2rem);margin-bottom:18px}
.post-head .dek{font-size:1.2rem;color:var(--ink-2);max-width:62ch}
.meta{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:.9rem;color:var(--mute);margin-top:20px}
.hero-fig{margin:8px 0 56px}
.hero-fig .shot{border-radius:16px;border:1px solid var(--line-2);overflow:hidden;box-shadow:var(--shadow);background:var(--panel)}
.hero-fig img{width:100%;aspect-ratio:1600/1000;object-fit:cover;object-position:left top}
figcaption{font-size:.9rem;color:var(--mute);margin-top:12px}

.layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:72px;align-items:start}
.toc{position:sticky;top:92px;font-size:.92rem;border-left:1px solid var(--line);padding-left:20px}
.toc p{font-weight:600;margin-bottom:10px}
.toc ol{list-style:none;display:grid;gap:8px}
.toc a{text-decoration:none;color:var(--mute)}
.toc a:hover{color:var(--ink)}
@media (max-width:980px){.layout{grid-template-columns:1fr}.toc{display:none}}

.prose{max-width:70ch}
.prose > * + *{margin-top:1.15em}
.prose h2{font-size:clamp(1.5rem,2.6vw,2rem);margin-top:2.2em;scroll-margin-top:90px}
.prose h3{font-size:1.2rem;margin-top:1.8em;letter-spacing:-.01em}
.prose p,.prose li{color:var(--ink-2)}
.prose strong{color:var(--ink);font-weight:600}
.prose a{color:var(--acc);text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.25em}
.prose li+li{margin-top:.45em}
.prose figure{margin:2em 0}
.prose figure .shot{border-radius:16px;border:1px solid var(--line-2);overflow:hidden;background:var(--panel)}
.prose figure img{width:100%;aspect-ratio:1600/1000;object-fit:cover;object-position:left top}
.answer{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--acc);border-radius:12px;padding:20px 22px}
.answer p{color:var(--ink)}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:var(--panel);margin:1.8em 0}
.tbl table{width:100%;border-collapse:collapse;font-size:.95rem}
.tbl th,.tbl td{padding:13px 16px;text-align:left;vertical-align:top}
.tbl thead th{color:var(--mute);font-weight:600;border-bottom:1px solid var(--line-2)}
.tbl tbody tr:nth-child(odd){background:color-mix(in oklab,var(--bg-2) 55%,transparent)}
.tbl td{color:var(--ink-2)}
.tbl td:first-child{color:var(--ink);font-weight:500}
.check{list-style:none;padding:0!important;display:grid;gap:12px}
.check li{display:grid;grid-template-columns:26px 1fr;gap:10px}
.check li::before{content:"";width:18px;height:18px;margin-top:5px;border-radius:5px;border:1.5px solid var(--acc);background:var(--acc-soft)}

.faq-list details{border-bottom:1px solid var(--line)}
.faq-list details:first-of-type{border-top:1px solid var(--line)}
.faq-list summary{list-style:none;cursor:pointer;padding:18px 0;font-weight:600;color:var(--ink);display:flex;justify-content:space-between;gap:20px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";color:var(--mute);font-weight:400;font-size:1.3rem;line-height:1;transition:transform .3s cubic-bezier(.16,1,.3,1)}
.faq-list details[open] summary::after{transform:rotate(45deg);color:var(--acc)}
.faq-list details p{padding-bottom:18px}

.cta-box{margin:3em 0 0;padding:32px;border-radius:16px;background:var(--ink);color:var(--bg);display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
.cta-box h2{font-size:1.5rem;margin:0!important;color:var(--bg)}
.cta-box p{color:color-mix(in oklab,var(--bg) 72%,var(--ink))!important;margin-top:8px!important}
@media (max-width:640px){.cta-box{grid-template-columns:1fr}}

.related{border-top:1px solid var(--line);margin-top:96px;padding:56px 0 24px}
.related h2{font-size:1.5rem;margin-bottom:24px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.card{display:block;text-decoration:none;border:1px solid var(--line);border-radius:16px;background:var(--panel);overflow:hidden;transition:border-color .2s,transform .3s cubic-bezier(.16,1,.3,1)}
.card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;object-position:left top;border-bottom:1px solid var(--line)}
.card div{padding:20px 22px 24px}
.card h3{font-size:1.1rem;margin-bottom:8px}
.card p{font-size:.95rem;color:var(--mute)}

/* Blog index */
.idx-head{padding:56px 0 40px;max-width:760px}
.idx-head h1{font-size:clamp(2.2rem,4.6vw,3.4rem);margin-bottom:16px}
.idx-head p{color:var(--ink-2);font-size:1.15rem}
.feature{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:40px;align-items:center;text-decoration:none;padding:32px 0;border-top:1px solid var(--line)}
.feature img{border-radius:16px;border:1px solid var(--line-2);aspect-ratio:1600/1000;object-fit:cover;object-position:left top;width:100%}
.feature h2{font-size:clamp(1.5rem,2.6vw,2.1rem);margin:8px 0 12px}
.feature p{color:var(--ink-2)}
.feature .meta{margin-top:14px}
.feature:hover h2{color:var(--acc)}
@media (max-width:860px){.feature{grid-template-columns:1fr;gap:20px}}

footer{border-top:1px solid var(--line);padding:32px 0 44px;font-size:.9rem;color:var(--mute);margin-top:80px}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between}
footer nav{display:flex;flex-wrap:wrap;gap:8px 22px}
footer a{text-decoration:none}
footer a:hover{color:var(--ink)}
.prose .btn{text-decoration:none}
.prose .btn-acc{color:var(--acc-ink)}