/* ============================================================
   Gundam Assemble Guide — mobile-suit hangar HUD skin
   Palette lifted from the game's own art: deep hangar navy,
   HUD cyan readouts, neon-green status, red / amber as signal
   accents only. Angular cut corners, panel seams, scanlines.
   ============================================================ */
:root{
  --bg:#0a1017;
  --bg2:#0c141d;
  --panel:#111b26;
  --panel2:#16222f;
  --panel3:#1b2937;
  --ink:#e9f2f8;
  --ink2:#c3d3e0;
  --muted:#8ea3b6;
  --line:#22303d;
  --line2:#2d3f4f;
  --cyan:#37e1e8;
  --cyan-dk:#0f6f76;
  --neon:#8bf08a;
  --red:#e5443c;
  --amber:#f4b942;
  --maxw:1240px;
  --font-display:"Bahnschrift SemiCondensed","Bahnschrift","Arial Narrow","Segoe UI",system-ui,sans-serif;
  --font-body:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,"Cascadia Mono",Consolas,"SFMono-Regular",monospace;
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;background:var(--bg)}
body{
  margin:0;
  background:
    radial-gradient(1100px 460px at 12% -8%,rgba(55,225,232,.10),transparent 62%),
    radial-gradient(900px 420px at 88% 4%,rgba(139,240,138,.06),transparent 60%),
    linear-gradient(180deg,#0a1017 0%,#0b131c 55%,#090f16 100%);
  color:var(--ink);
  font:17px/1.68 var(--font-body);
  letter-spacing:.002em;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(120,190,205,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,190,205,.05) 1px,transparent 1px);
  background-size:96px 96px,96px 96px;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.2) 70%,transparent);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),rgba(0,0,0,.2) 70%,transparent);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--cyan);text-decoration:none}
a:hover{color:#9df6fa;text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;z-index:99;background:var(--cyan);color:#04141a;padding:8px 14px}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------------- header ---------------- */
.topbar{
  position:sticky;top:0;z-index:40;
  background:linear-gradient(180deg,rgba(9,15,22,.97),rgba(9,15,22,.88));
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(6px);
}
.topbar::after{
  content:"";display:block;height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(55,225,232,0) 42%,rgba(139,240,138,.55) 78%,rgba(139,240,138,0));
  opacity:.55;
}
.bar{display:flex;align-items:center;gap:20px;min-height:66px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);font-family:var(--font-display);
  font-size:19px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}
.brand:hover{color:var(--ink);text-decoration:none}
.brand img{width:38px;height:38px;border:1px solid var(--line2);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%)}
.nav{margin-left:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav ul{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav li{position:relative}
.nav a{display:block;padding:9px 11px;color:var(--ink2);font-family:var(--font-mono);font-size:12.5px;
  text-transform:uppercase;letter-spacing:.09em;border:1px solid transparent;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 7px),calc(100% - 7px) 100%,0 100%)}
.nav a:hover{color:#05161a;background:var(--cyan);border-color:var(--cyan);text-decoration:none}
.nav li.active>a{color:var(--cyan);border-color:rgba(55,225,232,.45);background:rgba(55,225,232,.08)}
.nav li.has-kids>a::after{content:"▾";margin-left:7px;font-size:10px;opacity:.75}
.nav .kids{display:none}
.nav li.has-kids:hover>.kids,.nav li.has-kids:focus-within>.kids{display:flex}
.nav .kids{
  position:absolute;top:100%;left:0;z-index:60;min-width:270px;
  flex-direction:column;gap:0;padding:8px;
  background:linear-gradient(180deg,#101a24,#0c141d);
  border:1px solid var(--line2);
  border-top:2px solid var(--cyan);
  box-shadow:0 18px 40px rgba(0,0,0,.55);
}
.nav .kids a{padding:8px 10px;font-size:12px;letter-spacing:.05em;text-transform:none;border:0;clip-path:none}
.lang{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--muted);
  border:1px solid var(--line);padding:7px 10px;white-space:nowrap}
.lang .caret{color:var(--cyan);font-size:10px}
.nav a.cta{
  display:inline-flex;align-items:center;gap:7px;padding:10px 16px;
  background:var(--cyan);color:#04161a;font-weight:700;border-color:var(--cyan);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
}
.nav a.cta:hover{background:#5cf0f5;color:#04161a;text-decoration:none}

/* ---------------- hero ---------------- */
.hero{position:relative;padding:52px 0 26px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,rgba(55,225,232,.09),transparent 42%),
             repeating-linear-gradient(0deg,rgba(255,255,255,.022) 0 1px,transparent 1px 4px);
}
.hero-in{position:relative;display:grid;grid-template-columns:minmax(0,.94fr) minmax(0,1.06fr);gap:40px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;margin:0 0 14px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--neon);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--neon);display:inline-block}
.hero h1{
  margin:0 0 16px;font-family:var(--font-display);font-weight:700;
  font-size:clamp(2.5rem,5.1vw,4.3rem);line-height:.96;letter-spacing:.005em;text-transform:uppercase;
  text-shadow:0 0 26px rgba(55,225,232,.22);
}
.hero h1 .row{display:block}
.hero h1 .glow{color:var(--cyan)}
.lead{margin:0 0 20px;color:var(--ink2);font-size:18px;max-width:46ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:0}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 20px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;
  background:var(--cyan);color:#04161a;border:1px solid var(--cyan);font-weight:700;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.btn:hover{background:#5cf0f5;color:#04161a;text-decoration:none}
.btn.ghost{background:transparent;color:var(--cyan)}
.btn.ghost:hover{background:rgba(55,225,232,.12);color:#9df6fa}
.hero-shot{margin:0;position:relative}
.hero-shot .hk{display:block;position:relative;padding:8px;background:#0d1721;border:1px solid var(--line2)}
.hero-shot .hk::before,.hero-shot .hk::after{
  content:"";position:absolute;width:22px;height:22px;border:2px solid var(--cyan);opacity:.85;
}
.hero-shot .hk::before{left:-2px;top:-2px;border-right:0;border-bottom:0}
.hero-shot .hk::after{right:-2px;bottom:-2px;border-left:0;border-top:0}
.hero-shot img{width:100%;aspect-ratio:16/9;object-fit:cover;object-position:center 42%;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%)}
.hero-shot figcaption{margin-top:9px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}

/* ---------------- facts strip ---------------- */
.facts-strip{padding:6px 0 4px}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);
  border:1px solid var(--line)}
.fact{background:linear-gradient(180deg,#101a24,#0d151e);padding:13px 15px}
.fact-k{display:block;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--cyan);margin-bottom:5px}
.fact-v{display:block;font-family:var(--font-display);font-size:18px;letter-spacing:.02em;color:var(--ink)}

/* ---------------- section heads / grids ---------------- */
.section-head{margin:38px 0 16px;display:flex;flex-direction:column;gap:6px}
.overline{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.grid-title{margin-bottom:0}
.section-head h2{
  margin:0;font-family:var(--font-display);font-size:clamp(1.5rem,2.4vw,2rem);
  text-transform:uppercase;letter-spacing:.03em;display:flex;align-items:center;gap:12px;
}
.section-head h2::before{content:"";width:5px;height:26px;background:var(--cyan);display:inline-block}
.count-pill{font-family:var(--font-mono);font-size:11px;color:#04161a;background:var(--neon);
  padding:2px 8px;letter-spacing:.08em}
.grid{display:flex;flex-wrap:wrap;gap:16px;margin:0 0 8px}
.grid .card{flex:1 1 300px;max-width:calc(33.333% - 11px)}
.grid[data-n="2"] .card{max-width:calc(50% - 8px)}
.grid[data-n="1"] .card{max-width:100%}
.card{
  display:flex;flex-direction:column;background:linear-gradient(180deg,#121c27,#0f1822);
  border:1px solid var(--line);color:var(--ink);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 16px),calc(100% - 16px) 100%,0 100%);
  transition:border-color .16s ease,transform .16s ease,box-shadow .16s ease;
}
.card:hover{border-color:rgba(55,225,232,.6);transform:translateY(-2px);
  box-shadow:0 12px 26px rgba(0,0,0,.45);text-decoration:none}
.card .thumb{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:#0b131b;border-bottom:1px solid var(--line)}
.card .thumb img{width:100%;height:100%;object-fit:cover;object-position:center 42%;transition:transform .3s ease}
.card .thumb.contain{display:flex;align-items:center;justify-content:center;padding:8px 12px;
  background:radial-gradient(120% 120% at 50% 0%,#152231,#0b131b)}
.card .thumb.contain img{object-fit:contain;width:auto;height:100%;max-width:100%}
.card:hover .thumb img{transform:scale(1.04)}
.card .thumb::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,16,23,.10),rgba(10,16,23,.58))}
.pill-tag{position:absolute;left:10px;top:10px;font-family:var(--font-mono);font-size:10px;
  letter-spacing:.14em;text-transform:uppercase;background:rgba(8,14,20,.86);color:var(--cyan);
  border:1px solid rgba(55,225,232,.5);padding:3px 7px}
.card-body{padding:14px 15px 16px;display:flex;flex-direction:column;gap:7px;flex:1}
.card h3{margin:0;font-family:var(--font-display);font-size:19px;line-height:1.16;
  text-transform:uppercase;letter-spacing:.02em;color:var(--ink)}
.card p{margin:0;color:var(--muted);font-size:14.5px;line-height:1.5}
.card .go{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--neon)}
.card .stamp{font-family:var(--font-mono);font-size:10.5px;color:#6d8397;letter-spacing:.08em}
.card.sm{flex:1 1 220px}
.card.sm .card-body{padding:11px 13px}
.card.sm h3{font-size:16px}

/* ---------------- article ---------------- */
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 236px;gap:34px;align-items:start;padding:30px 22px 56px}
.article-grid>div{min-width:0}
.crumb{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;
  color:var(--muted);margin:0 0 14px;display:flex;flex-wrap:wrap;gap:7px;align-items:center}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--cyan)}
.crumb .sep{color:var(--muted)}
.crumb .here{color:var(--cyan)}
article{
  background:linear-gradient(180deg,#111b26,#0e1721);
  border:1px solid var(--line);
  border-left:3px solid rgba(55,225,232,.55);
  padding:30px 34px 34px;counter-reset:sec;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
article h1{
  margin:0 0 16px;font-family:var(--font-display);font-weight:700;text-transform:uppercase;
  font-size:clamp(1.85rem,3.2vw,2.7rem);line-height:1.02;letter-spacing:.01em;
}
article h2{
  counter-increment:sec;position:relative;
  margin:34px 0 12px;padding-left:46px;font-family:var(--font-display);
  font-size:clamp(1.25rem,2vw,1.6rem);text-transform:uppercase;letter-spacing:.03em;
  color:var(--ink);line-height:1.2;
}
article h2::before{
  content:"[" counter(sec,decimal-leading-zero) "]";position:absolute;left:0;top:.2em;
  font-family:var(--font-mono);font-size:12px;color:var(--cyan);letter-spacing:.02em;
}
article h2::after{
  content:"";position:absolute;left:0;bottom:-6px;width:100%;height:1px;
  background:linear-gradient(90deg,rgba(55,225,232,.4),rgba(55,225,232,0) 70%);
}
article h3{margin:22px 0 8px;font-family:var(--font-display);font-size:1.12rem;
  text-transform:uppercase;letter-spacing:.05em;color:var(--neon)}
article p{margin:0 0 14px;color:var(--ink2)}
article ul,article ol{margin:0 0 16px;padding-left:22px;color:var(--ink2)}
article li{margin:6px 0}
article li::marker{color:var(--cyan)}
article strong{color:#fff}
article em{color:var(--ink);font-style:italic}
article img.zoom{width:100%;border:1px solid var(--line2);margin:6px 0 18px;cursor:zoom-in;
  filter:brightness(.9) contrast(1.03) saturate(.95);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%)}
article img.zoom:hover{filter:brightness(1) contrast(1)}
article code{font-family:var(--font-mono);font-size:.9em;background:#0a1420;border:1px solid var(--line);
  padding:1px 5px;color:var(--neon)}
.art-lead{color:var(--ink2);font-size:17px;margin:6px 0 4px;max-width:74ch}
.art-meta{color:var(--muted);font-size:12.5px;margin:0 0 18px;font-family:var(--font-mono);letter-spacing:.08em}

.quick-answer{position:relative;margin:0 0 24px;padding:16px 18px 14px;
  background:linear-gradient(180deg,rgba(55,225,232,.10),rgba(55,225,232,.03));
  border:1px solid rgba(55,225,232,.35)}
.quick-answer::before{content:"";position:absolute;left:-1px;top:-1px;width:34px;height:3px;background:var(--cyan)}
.qa-stamp{display:block;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--cyan);margin-bottom:6px}
.quick-answer p{margin:0;color:var(--ink)}

.tbl-wrap{margin:6px 0 20px;overflow-x:auto;border:1px solid var(--line2);background:#0c1520}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:#0f2a31;color:#a9f4f7;font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.12em;text-transform:uppercase;font-weight:600;white-space:nowrap}
td{color:var(--ink2);font-variant-numeric:tabular-nums}
tbody tr:nth-child(even){background:rgba(255,255,255,.022)}
tbody tr:hover{background:rgba(55,225,232,.055)}
table strong,table b{color:#fff}
table a{color:var(--cyan)}

.callout{margin:18px 0;padding:14px 16px;background:#0d1a24;border:1px solid var(--line2);
  border-left:3px solid var(--amber)}
.callout p:last-child{margin-bottom:0}
.callout.note{border-left-color:var(--cyan)}
.callout.warn{border-left-color:var(--red)}
blockquote{border-left:3px solid var(--line2);margin:16px 0;padding:4px 14px;color:var(--muted)}

.toc{position:sticky;top:92px}
.toc .overline{display:block;margin-bottom:10px}
.toc-list{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line)}
.toc-list a{display:block;padding:6px 8px 6px 12px;color:var(--muted);font-size:13.5px;
  border-left:2px solid transparent;margin-left:-1px}
.toc-list a:hover{color:var(--cyan);border-left-color:var(--cyan);text-decoration:none;background:rgba(55,225,232,.05)}

.all-guides{margin-top:40px;padding-top:8px;border-top:1px solid var(--line)}
.next-links{list-style:none;margin:4px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.next-links li{margin:0}
.next-links a{display:inline-block;padding:7px 12px;border:1px solid var(--line2);color:var(--ink2);
  font-size:14px;background:#0e1822}
.next-links a:hover{border-color:var(--cyan);color:var(--cyan);text-decoration:none}
.all-link{margin:14px 0 0;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase}

/* ---------------- footer ---------------- */
.foot{margin-top:20px;background:linear-gradient(180deg,#0a1219,#070d13);border-top:1px solid var(--line);
  padding:30px 0 34px}
.foot .disclaimer{color:var(--muted);font-size:13.5px;max-width:88ch;margin:0 0 12px}
.foot-links{margin:0 0 10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.foot-links a{color:var(--ink2)}
.foot-links a:hover{color:var(--cyan)}
.foot .muted{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#6b8095;margin:0}

/* ---------------- lightbox ---------------- */
.lightbox{position:fixed;inset:0;z-index:99;background:rgba(4,8,13,.95);display:flex;
  align-items:center;justify-content:center;cursor:zoom-out;padding:20px}
.lightbox img{max-width:min(1500px,96vw);max-height:92vh;width:auto;height:auto;border:1px solid var(--line2)}

/* ---------------- ad slot (renders only when a key exists) ---------------- */
@media (hover: hover) and (pointer: fine){
  .ad-slot{display:block}
}
@media not all and (hover: hover) and (pointer: fine){
  .ad-slot{display:none}
}
.ad-slot{margin:26px auto;max-width:var(--maxw)}
.ad-slot:empty{display:none}
.ad-label{margin:0 0 8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.ad-inner{min-height:0;overflow:hidden}

/* ---------------- responsive ---------------- */
@media (max-width:1100px){
  .article-grid{grid-template-columns:minmax(0,1fr);padding:24px 20px 48px}
  .toc{display:none}
  .grid .card{max-width:calc(50% - 8px)}
}
@media (max-width:920px){
  .hero-in{grid-template-columns:minmax(0,1fr);gap:26px}
  .hero-shot{order:-1}
  .hero{padding:28px 0 18px}
  .hero h1{font-size:clamp(2.1rem,8vw,3rem)}
  .nav{justify-content:flex-start;width:100%;margin-left:0}
  .nav .kids{display:none !important}
  .nav li.has-kids>a::after{display:none}
  .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  article{padding:22px 20px 26px;border-left-width:2px}
}
@media (max-width:620px){
  body{font-size:16px}
  .grid .card,.grid[data-n="2"] .card{max-width:100%}
  .facts{grid-template-columns:1fr}
  .nav ul{gap:2px}
  .nav a{padding:8px 8px;font-size:11.5px;letter-spacing:.06em}
  .nav a.cta{padding:8px 11px}
  article h2{padding-left:40px}
  th,td{padding:8px 9px;font-size:14px}
  .hero h1{font-size:clamp(1.95rem,9vw,2.6rem)}
}