/* ============================================================
   BlockPedia — global stylesheet
   Dark gaming theme, mobile-first, no framework dependencies
   ============================================================ */
:root{
  --bg:#0d1117;
  --panel:#141a23;
  --panel-2:#1b2330;
  --border:#2a3342;
  --text:#e6edf3;
  --muted:#9aa7b4;
  --accent:#7ddb4a;        /* grass green */
  --accent-dk:#4c9a2a;
  --gold:#f5c542;
  --red:#ef6a5e;
  --blue:#58a6ff;
  --radius:12px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.25;margin:1.4em 0 .6em}
h1{font-size:clamp(1.7rem,4vw,2.4rem)}
h2{font-size:1.5rem;border-left:4px solid var(--accent);padding-left:.6rem}
h3{font-size:1.2rem}
p{margin:.7em 0}
ul,ol{padding-left:1.4rem}
li{margin:.3em 0}
code,kbd{
  background:var(--panel-2);border:1px solid var(--border);border-radius:6px;
  padding:.1em .4em;font-size:.9em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
hr{border:none;border-top:1px solid var(--border);margin:2rem 0}
::selection{background:var(--accent-dk);color:#fff}

/* ---------- layout ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.section{padding:2.2rem 0}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(13,17,23,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;gap:1.2rem;height:60px}
.brand{
  font-family:"Press Start 2P",ui-monospace,monospace;font-size:.95rem;letter-spacing:1px;
  color:var(--text);display:flex;align-items:center;gap:.55rem;white-space:nowrap;
}
.brand:hover{text-decoration:none}
.brand .cube{
  width:20px;height:20px;border-radius:4px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--accent) 0 50%,var(--accent-dk) 50% 100%);
  box-shadow:0 0 10px rgba(125,219,74,.5);
}
.brand em{color:var(--accent);font-style:normal}
.nav-links{display:flex;gap:.2rem;margin-left:auto;align-items:center}
.nav-links a{
  color:var(--muted);padding:.5rem .8rem;border-radius:8px;font-size:.95rem;font-weight:500;
}
.nav-links a:hover{color:var(--text);background:var(--panel-2);text-decoration:none}
.nav-links a.active{color:var(--accent)}
.nav-search-btn,.nav-toggle{
  background:var(--panel-2);border:1px solid var(--border);color:var(--muted);
  border-radius:8px;padding:.45rem .7rem;cursor:pointer;font-size:.9rem;
}
.nav-search-btn:hover,.nav-toggle:hover{color:var(--text);border-color:var(--accent)}
.nav-toggle{display:none}

/* ---------- search overlay ---------- */
.search-overlay{
  display:none;position:fixed;inset:0;z-index:100;background:rgba(5,8,12,.8);backdrop-filter:blur(4px);
}
.search-overlay.open{display:flex;align-items:flex-start;justify-content:center;padding:12vh 16px 0}
.search-box{
  width:100%;max-width:560px;background:var(--panel);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:0 20px 60px rgba(0,0,0,.6);overflow:hidden;
}
.search-box input{
  width:100%;background:transparent;border:none;outline:none;color:var(--text);
  padding:1rem 1.2rem;font-size:1.05rem;border-bottom:1px solid var(--border);
}
.search-results{max-height:50vh;overflow:auto}
.search-results a{display:block;padding:.8rem 1.2rem;color:var(--text);border-bottom:1px solid var(--border)}
.search-results a:last-child{border-bottom:none}
.search-results a:hover{background:var(--panel-2);text-decoration:none}
.search-results .sr-title{font-weight:600}
.search-results .sr-desc{color:var(--muted);font-size:.85rem}
.search-empty{padding:1.2rem;color:var(--muted);text-align:center}

/* ---------- hero ---------- */
.hero{
  padding:4rem 0 3rem;text-align:center;
  background:
    radial-gradient(700px 300px at 50% -80px,rgba(125,219,74,.14),transparent 70%),
    var(--bg);
}
.hero h1{margin:.2em 0 .3em}
.hero .tagline{color:var(--muted);font-size:1.1rem;max-width:640px;margin:0 auto 1.6rem}
.hero-stats{display:flex;gap:2rem;justify-content:center;flex-wrap:wrap;margin-top:2rem}
.hero-stats .stat{text-align:center}
.hero-stats .num{font-size:1.5rem;font-weight:700;color:var(--accent)}
.hero-stats .lbl{color:var(--muted);font-size:.85rem}
.btn{
  display:inline-block;background:var(--accent);color:#0b1206;font-weight:700;
  padding:.75rem 1.6rem;border-radius:10px;border:none;cursor:pointer;font-size:1rem;
  transition:transform .15s ease,box-shadow .15s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(125,219,74,.35);text-decoration:none}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn.ghost:hover{box-shadow:none;background:rgba(125,219,74,.08)}

/* ---------- cards ---------- */
.grid{display:grid;gap:1.2rem}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.4rem;display:flex;flex-direction:column;gap:.5rem;
  transition:border-color .15s ease,transform .15s ease;
}
.card:hover{border-color:var(--accent);transform:translateY(-3px)}
.card .icon{font-size:1.8rem}
.card h3{margin:.2rem 0}
.card p{color:var(--muted);font-size:.93rem;margin:0}
.card .meta{margin-top:auto;padding-top:.6rem;color:var(--muted);font-size:.8rem}
a.card{color:var(--text)}
a.card:hover{text-decoration:none}
a.card h3{color:var(--text)}
a.card:hover h3{color:var(--accent)}
.badge{
  display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.5px;text-transform:uppercase;
  color:var(--accent);background:rgba(125,219,74,.1);border:1px solid rgba(125,219,74,.3);
  padding:.15rem .55rem;border-radius:999px;
}
.badge.gold{color:var(--gold);background:rgba(245,197,66,.1);border-color:rgba(245,197,66,.3)}
.badge.blue{color:var(--blue);background:rgba(88,166,255,.1);border-color:rgba(88,166,255,.3)}

/* ---------- guide/article layout ---------- */
.guide-layout{display:grid;grid-template-columns:230px minmax(0,1fr) 300px;gap:2.2rem;padding:2rem 0}
.guide-toc{position:sticky;top:80px;align-self:start;font-size:.9rem}
.guide-toc .toc-title{color:var(--muted);font-weight:700;font-size:.78rem;text-transform:uppercase;letter-spacing:1px;margin-bottom:.6rem}
.guide-toc a{display:block;color:var(--muted);padding:.28rem 0 .28rem .8rem;border-left:2px solid var(--border)}
.guide-toc a:hover{color:var(--text);text-decoration:none}
.guide-toc a.active{color:var(--accent);border-left-color:var(--accent)}
.guide-body{min-width:0}
.guide-body h2{scroll-margin-top:80px}
.guide-body h3{scroll-margin-top:80px}
.guide-aside{position:sticky;top:80px;align-self:start;display:flex;flex-direction:column;gap:1rem}
.breadcrumbs{font-size:.85rem;color:var(--muted);padding:1rem 0 0}
.breadcrumbs a{color:var(--muted)}
.article-meta{display:flex;gap:1rem;flex-wrap:wrap;color:var(--muted);font-size:.85rem;margin:.4rem 0 1rem}
.lede{font-size:1.08rem;color:var(--muted)}

/* ---------- tables ---------- */
.table-scroll{overflow-x:auto;margin:1rem 0;border:1px solid var(--border);border-radius:var(--radius)}
table{border-collapse:collapse;width:100%;font-size:.93rem;background:var(--panel)}
th,td{padding:.65rem .9rem;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}
th{background:var(--panel-2);color:var(--text);white-space:nowrap;font-size:.85rem;text-transform:uppercase;letter-spacing:.5px}
tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(125,219,74,.04)}
td .sub{color:var(--muted);font-size:.82rem}

/* ---------- callouts ---------- */
.callout{
  border:1px solid var(--border);border-left:4px solid var(--accent);
  background:var(--panel);border-radius:8px;padding:.9rem 1.1rem;margin:1.1rem 0;font-size:.95rem;
}
.callout.warn{border-left-color:var(--gold)}
.callout.danger{border-left-color:var(--red)}
.callout .ttl{font-weight:700;display:block;margin-bottom:.2rem}

/* ---------- diagrams / figures ---------- */
figure.diagram{
  margin:1.4rem 0;text-align:center;background:var(--panel);
  border:1px solid var(--border);border-radius:12px;padding:1rem;
}
figure.diagram svg{display:inline-block;max-width:100%;height:auto}
figure.diagram figcaption{
  margin-top:.7rem;font-size:.85rem;color:var(--muted);line-height:1.4;
}

/* ---------- FAQ ---------- */
details.faq{
  background:var(--panel);border:1px solid var(--border);border-radius:10px;margin:.7rem 0;
}
details.faq summary{
  cursor:pointer;padding:.9rem 1.1rem;font-weight:600;list-style:none;position:relative;padding-right:2.4rem;
}
details.faq summary::after{
  content:"+";position:absolute;right:1rem;top:50%;transform:translateY(-50%);
  color:var(--accent);font-size:1.3rem;font-weight:400;
}
details.faq[open] summary::after{content:"–"}
details.faq .faq-body{padding:0 1.1rem .9rem;color:var(--muted)}

/* ---------- ad slots (placeholders) ---------- */
.ad-slot{
  display:flex;align-items:center;justify-content:center;
  min-height:110px;margin:1.6rem 0;border:1.5px dashed var(--border);border-radius:var(--radius);
  color:var(--muted);font-size:.78rem;letter-spacing:2px;text-transform:uppercase;
  background:repeating-linear-gradient(45deg,transparent 0 12px,rgba(255,255,255,.015) 12px 24px);
}
.ad-slot.rect{min-height:250px}
.ad-slot.sky{min-height:600px}

/* ---------- tool / calculator ---------- */
.tool-panel{
  background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:1.6rem;
}
.field{margin-bottom:1.1rem}
.field label{display:block;font-weight:600;margin-bottom:.35rem;font-size:.95rem}
.field input[type=number],.field input[type=text],.field select{
  width:100%;background:var(--panel-2);border:1px solid var(--border);border-radius:8px;
  color:var(--text);padding:.65rem .8rem;font-size:1rem;outline:none;
}
.field input:focus,.field select:focus{border-color:var(--accent)}
.field .hint{color:var(--muted);font-size:.82rem;margin-top:.25rem}
.result-box{
  margin-top:1.4rem;background:var(--panel-2);border:1px solid var(--accent-dk);
  border-radius:var(--radius);padding:1.2rem 1.4rem;
}
.result-box .big{font-size:2rem;font-weight:800;color:var(--accent)}
.equiv-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.6rem;margin-top:1rem}
.equiv-list .eq{background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:.6rem .8rem;font-size:.88rem}
.equiv-list .eq b{display:block;color:var(--gold);font-size:1.05rem}

/* ---------- newsletter ---------- */
.newsletter{
  background:linear-gradient(135deg,rgba(125,219,74,.1),rgba(88,166,255,.06));
  border:1px solid var(--border);border-radius:var(--radius);padding:2rem;text-align:center;
}
.newsletter form{display:flex;gap:.6rem;max-width:460px;margin:1rem auto 0}
.newsletter input{
  flex:1;background:var(--panel);border:1px solid var(--border);border-radius:8px;
  color:var(--text);padding:.7rem .9rem;font-size:.95rem;outline:none;
}
.newsletter input:focus{border-color:var(--accent)}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--border);margin-top:3rem;background:var(--panel)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;padding:2.6rem 0 1.6rem}
.footer-grid h4{color:var(--text);margin:0 0 .7rem;font-size:.9rem}
.footer-grid a{display:block;color:var(--muted);padding:.2rem 0;font-size:.9rem}
.footer-grid a:hover{color:var(--accent);text-decoration:none}
.footer-note{color:var(--muted);font-size:.85rem;max-width:420px}
.footer-legal{
  border-top:1px solid var(--border);padding:1.1rem 0;color:var(--muted);
  font-size:.8rem;display:flex;gap:1.4rem;flex-wrap:wrap;justify-content:space-between;
}

/* ---------- misc ---------- */
.filter-input{
  width:100%;max-width:360px;background:var(--panel-2);border:1px solid var(--border);
  border-radius:8px;color:var(--text);padding:.6rem .9rem;font-size:.95rem;outline:none;margin:.4rem 0 .8rem;
}
.filter-input:focus{border-color:var(--accent)}
.pill-list{display:flex;flex-wrap:wrap;gap:.5rem;padding:0;list-style:none}
.pill-list li{
  margin:0;background:var(--panel-2);border:1px solid var(--border);border-radius:999px;
  padding:.25rem .8rem;font-size:.85rem;color:var(--muted);
}
.text-muted{color:var(--muted)}
.center{text-align:center}
.mt-0{margin-top:0}

/* ---------- responsive ---------- */
@media (max-width:1020px){
  .guide-layout{grid-template-columns:minmax(0,1fr)}
  .guide-toc,.guide-aside{position:static}
  .guide-toc{border:1px solid var(--border);border-radius:var(--radius);padding:1rem;background:var(--panel)}
  .grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .grid.cols-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .nav-links{
    display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;
    background:var(--panel);border-bottom:1px solid var(--border);padding:.6rem;align-items:stretch;
  }
  .nav-links.open{display:flex}
  .nav-toggle{display:block;margin-left:auto}
  .nav-search-btn{margin-left:auto}
  .nav-toggle:has(+ .nav-search-btn){margin-left:0}
  .grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}
  .newsletter form{flex-direction:column}
  .hero{padding:2.6rem 0 2rem}
}