/* ==========================================================================
   Nestly Blog — Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root{
  --bg:#090c11;
  --bg-1:#0d1219;
  --bg-2:#121826;
  --bg-card:#111722;
  --border:rgba(255,255,255,.08);
  --border-2:rgba(255,255,255,.14);
  --text:#f3f6fa;
  --text-dim:#aab2c0;
  --text-dimmer:#727b8a;
  --accent:#2fe0ac;
  --accent-2:#5eead4;
  --accent-soft:rgba(47,224,172,.12);
  --accent-line:rgba(47,224,172,.35);
  --warn:#f5b95c;
  --danger:#f56c6c;
  --radius:18px;
  --radius-sm:10px;
  --maxw:1160px;
  --shadow:0 20px 60px -20px rgba(0,0,0,.6);
  --ff-head:'Plus Jakarta Sans', system-ui, sans-serif;
  --ff-body:'Inter', system-ui, sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--ff-body);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--ff-head);line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em}
p{margin:0 0 1.1em}
ul,ol{padding-left:1.3em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* background ambience */
body::before{
  content:"";
  position:fixed;inset:0;
  background:
    radial-gradient(60vw 60vw at 85% -10%, rgba(47,224,172,.10), transparent 60%),
    radial-gradient(50vw 50vw at -10% 20%, rgba(94,234,212,.06), transparent 60%);
  pointer-events:none;
  z-index:0;
}

/* ---------------- Reading progress bar ---------------- */
.progress-bar{
  position:fixed;top:0;left:0;height:3px;width:0%;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  z-index:1000;transition:width .1s linear;
}

/* ---------------- Header / nav ---------------- */
header.site{
  position:sticky;top:0;z-index:100;
  border-bottom:1px solid var(--border);
}
/* Blur/background lives on a pseudo-element, not on header.site itself —
   putting backdrop-filter directly on header.site would make it a containing
   block for its fixed-position mobile nav panel, breaking that panel's
   viewport-relative positioning. */
header.site::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:rgba(9,12,17,.72);
  backdrop-filter:blur(14px);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:var(--maxw);margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--ff-head);font-weight:800;font-size:1.15rem;color:var(--text)}
.brand .mark{
  width:32px;height:32px;border-radius:9px;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:flex;align-items:center;justify-content:center;
  color:#04140f;font-weight:800;font-size:1rem;
}
.nav-links{display:flex;align-items:center;gap:28px;font-size:.94rem;color:var(--text-dim)}
.nav-links a{padding:6px 0;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-cta{
  background:var(--accent);color:#04140f;padding:10px 18px;border-radius:999px;
  font-weight:700;font-size:.9rem;transition:transform .18s ease, box-shadow .18s ease;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 24px -8px rgba(47,224,172,.5)}
.burger{display:none;background:none;border:0;color:var(--text);font-size:1.4rem;cursor:pointer}

@media (max-width:760px){
  .nav-links{
    position:fixed;inset:64px 0 0 0;background:var(--bg-1);
    flex-direction:column;align-items:flex-start;gap:0;
    padding:20px 24px;border-top:1px solid var(--border);
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:transform .22s ease, opacity .22s ease;
  }
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-links a{width:100%;padding:14px 0;border-bottom:1px solid var(--border)}
  .nav-cta{margin-top:12px}
  .burger{display:block}
}

/* ---------------- Hero ---------------- */
.hero{position:relative;padding:96px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.28;filter:saturate(1.1)}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(9,12,17,.4) 0%, var(--bg) 92%);
}
.blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.35;z-index:0;animation:drift 16s ease-in-out infinite}
.blob-1{width:420px;height:420px;background:var(--accent);top:-140px;right:-100px;animation-delay:0s}
.blob-2{width:320px;height:320px;background:#4f7cff;bottom:-120px;left:-80px;animation-delay:-6s}
@keyframes drift{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(30px,-24px) scale(1.08)}
}
@media (prefers-reduced-motion: reduce){
  .blob{animation:none}
  .card,.reveal{transition:none !important;opacity:1 !important;transform:none !important}
}
/* No-JS fallback: never hide content if scripts don't run */
.no-js .card,.no-js .reveal{opacity:1 !important;transform:none !important}

.hero-inner{position:relative;z-index:1;text-align:center;max-width:780px;margin:0 auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-soft);border:1px solid var(--accent-line);color:var(--accent-2);
  padding:6px 14px;border-radius:999px;font-size:.82rem;font-weight:600;margin-bottom:22px;
}
.hero h1{font-size:clamp(2.2rem,5vw,3.4rem);font-weight:800}
.hero h1 .accent{background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:1.15rem;color:var(--text-dim);max-width:600px;margin:0 auto 32px}

/* animated stat row */
.stats{display:flex;justify-content:center;gap:48px;flex-wrap:wrap;margin-top:44px}
.stat{text-align:center}
.stat .num{font-family:var(--ff-head);font-weight:800;font-size:2.1rem;color:var(--text)}
.stat .num .suffix{color:var(--accent)}
.stat .label{font-size:.85rem;color:var(--text-dimmer);margin-top:2px}

/* ---------------- Section headings ---------------- */
.section-head{max-width:640px;margin:0 auto 44px;text-align:center}
.section-head h2{font-size:clamp(1.6rem,3.4vw,2.2rem)}
.section-head p{color:var(--text-dim)}
.section{padding:64px 0;position:relative;z-index:1}

/* ---------------- Article grid / cards ---------------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
@media (max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.grid{grid-template-columns:1fr}}

.card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;
  transform:translateY(16px);opacity:0;
  transition:transform .5s cubic-bezier(.2,.7,.2,1), opacity .5s ease, border-color .25s ease, box-shadow .25s ease;
}
.card.in-view{transform:translateY(0);opacity:1}
.card:hover{border-color:var(--border-2);box-shadow:var(--shadow);transform:translateY(-4px)}
.card .thumb{aspect-ratio:16/10;overflow:hidden;position:relative}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .thumb img{transform:scale(1.06)}
.card .tag{
  position:absolute;top:12px;left:12px;background:rgba(9,12,17,.72);backdrop-filter:blur(6px);
  color:var(--accent-2);font-size:.72rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase;
  padding:5px 10px;border-radius:999px;border:1px solid var(--border-2);
}
.card .body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:1.12rem;margin-bottom:8px}
.card p{color:var(--text-dim);font-size:.92rem;flex:1}
.card .meta{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;color:var(--text-dimmer);margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}
.card .readmore{color:var(--accent);font-weight:600;font-size:.85rem;display:inline-flex;align-items:center;gap:5px}
.card .readmore svg{transition:transform .2s ease}
.card:hover .readmore svg{transform:translateX(3px)}

/* stagger delays via inline style --d */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.in-view{opacity:1;transform:translateY(0)}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:999px;
  font-weight:700;font-size:.95rem;cursor:pointer;border:1px solid transparent;
}
.btn-primary{background:var(--accent);color:#04140f}
.btn-primary:hover{box-shadow:0 12px 28px -10px rgba(47,224,172,.55);transform:translateY(-2px)}
.btn-ghost{background:transparent;border-color:var(--border-2);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent-line);color:var(--accent-2)}
.btn{transition:all .18s ease}

/* ---------------- Footer ---------------- */
footer.site{border-top:1px solid var(--border);padding:44px 0;color:var(--text-dimmer);font-size:.88rem}
footer.site .row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;align-items:center}
footer.site a:hover{color:var(--accent-2)}

/* ==========================================================================
   Article page
   ========================================================================== */
.article-hero{position:relative;padding:52px 0 0}
.breadcrumb{font-size:.85rem;color:var(--text-dimmer);margin-bottom:18px;display:flex;gap:8px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--accent-2)}
.article-hero h1{font-size:clamp(1.9rem,4.2vw,2.7rem);max-width:820px}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--text-dim);font-size:.88rem;margin:18px 0 30px;align-items:center}
.avatar{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#4f7cff);display:inline-flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:800;color:#04140f}
.cover{border-radius:var(--radius);overflow:hidden;aspect-ratio:16/8;margin-bottom:8px;border:1px solid var(--border)}
.cover img{width:100%;height:100%;object-fit:cover}

.article-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:56px;padding:48px 0 80px;align-items:start}
@media (max-width:920px){.article-layout{grid-template-columns:minmax(0,1fr)}}

.toc{position:sticky;top:96px}
.toc h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dimmer);margin-bottom:12px}
.toc ol{list-style:none;padding:0;margin:0;border-left:1px solid var(--border);display:flex;flex-direction:column}
.toc a{
  display:block;padding:7px 0 7px 16px;font-size:.87rem;color:var(--text-dim);border-left:2px solid transparent;margin-left:-1px;
  transition:color .15s ease, border-color .15s ease;
}
.toc a:hover{color:var(--text)}
.toc a.active{color:var(--accent-2);border-left-color:var(--accent)}
@media (max-width:920px){.toc{position:static;margin-bottom:8px}
  .toc ol{flex-direction:row;flex-wrap:wrap;border-left:0;gap:8px}
  .toc a{border:1px solid var(--border);border-radius:999px;padding:6px 14px;margin-left:0}
  .toc a.active{border-color:var(--accent-line);background:var(--accent-soft)}
}

.prose{font-size:1.04rem;color:#dfe4ea;max-width:720px}
.prose h2{font-size:1.5rem;margin-top:2.2em;scroll-margin-top:100px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.18rem;margin-top:1.7em;color:var(--text)}
.prose p{color:#c9d0da}
.prose strong{color:var(--text)}
.prose a.inline-link{color:var(--accent-2);text-decoration:underline;text-underline-offset:3px}
.prose ul li, .prose ol li{margin-bottom:.5em;color:#c9d0da}
.prose blockquote{
  margin:1.6em 0;padding:4px 0 4px 20px;border-left:3px solid var(--accent);
  color:var(--text-dim);font-style:italic;
}

.callout{
  border-radius:var(--radius-sm);border:1px solid var(--border-2);padding:18px 20px;margin:1.8em 0;
  display:flex;gap:14px;background:var(--bg-card);
}
.callout .icon{font-size:1.2rem;line-height:1.3}
.callout h4{margin:0 0 4px;font-size:.95rem}
.callout p{margin:0;color:var(--text-dim);font-size:.92rem}
.callout.tip{border-color:var(--accent-line);background:var(--accent-soft)}
.callout.tip h4{color:var(--accent-2)}
.callout.warn{border-color:rgba(245,185,92,.4);background:rgba(245,185,92,.08)}
.callout.warn h4{color:var(--warn)}
.callout.tldr{border-color:var(--border-2)}

.data-table{width:100%;min-width:560px;border-collapse:collapse;margin:1.6em 0;font-size:.92rem;overflow:hidden;border-radius:var(--radius-sm)}
.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--border);text-align:left}
.data-table th{background:var(--bg-2);color:var(--text);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.03em}
.data-table tr:last-child td{border-bottom:0}
.data-table td{color:var(--text-dim)}
.table-wrap{overflow-x:auto}

/* stat/number highlight boxes inside articles */
.mini-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:1.8em 0}
.mini-stat{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px}
.mini-stat .n{font-family:var(--ff-head);font-weight:800;font-size:1.5rem;color:var(--accent-2)}
.mini-stat .l{font-size:.8rem;color:var(--text-dimmer);margin-top:2px}

/* FAQ accordion */
.faq{margin-top:1.6em}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:18px 2px;cursor:pointer;font-weight:600;color:var(--text);font-family:var(--ff-head);font-size:1rem;
}
.faq-q .plus{color:var(--accent);font-size:1.3rem;transition:transform .25s ease;flex:none}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{color:var(--text-dim);padding:0 2px 18px;margin:0;font-size:.94rem}

.share-row{display:flex;gap:10px;margin-top:2.4em;padding-top:1.6em;border-top:1px solid var(--border)}
.share-row a{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--border-2);
  display:flex;align-items:center;justify-content:center;color:var(--text-dim);transition:all .18s ease;
}
.share-row a:hover{color:#04140f;background:var(--accent);border-color:var(--accent)}

.related{margin-top:60px}
.author-box{
  display:flex;gap:16px;align-items:flex-start;background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:22px;margin-top:2.4em;
}
.author-box .avatar{width:46px;height:46px;font-size:1rem}
.author-box h4{margin:0 0 4px}
.author-box p{margin:0;color:var(--text-dim);font-size:.9rem}

/* CTA band */
.cta-band{
  border-radius:24px;padding:56px 40px;text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(135deg, rgba(47,224,172,.14), rgba(79,124,255,.10));
  border:1px solid var(--border-2);
}
.cta-band h2{font-size:clamp(1.5rem,3vw,2rem)}
.cta-band p{color:var(--text-dim);max-width:520px;margin:0 auto 26px}

/* utility */
.text-center{text-align:center}
.mt-0{margin-top:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}