:root{
  --bg:#f7f7f4; --ink:#14130f; --muted:#615f57; --line:#e4e2d9;
  --cobalt:#2546e8; --amber:#e8870b; --steel:#3a4656;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:'Space Grotesk',sans-serif;overflow-x:hidden;line-height:1.5;
  background-image:linear-gradient(rgba(20,19,15,.024) 1px,transparent 1px),linear-gradient(90deg,rgba(20,19,15,.024) 1px,transparent 1px);background-size:34px 34px}
::selection{background:var(--amber);color:#fff}
a{text-decoration:none;color:inherit}

/* ---------- NAV ---------- */
nav{position:sticky;top:0;z-index:40;display:flex;justify-content:space-between;align-items:center;
  padding:16px 42px;background:rgba(247,247,244,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.logo .mk{width:24px;height:24px;border:2px solid var(--cobalt);border-radius:50%;position:relative;display:grid;place-items:center}
.logo .mk::after{content:'';width:6px;height:6px;background:var(--amber);border-radius:50%}
.navlinks{display:flex;gap:4px;align-items:center}
.navlinks a{font-family:'Space Mono',monospace;font-size:13px;color:var(--muted);padding:8px 14px;border-radius:6px;transition:.18s}
.navlinks a:hover{color:var(--ink);background:#fff}
.navlinks a.active{color:var(--ink);background:#fff}
.navlinks .cta{border:1px solid var(--ink);color:var(--ink)}.navlinks .cta:hover{background:var(--ink);color:var(--bg)}

/* ---------- BUTTONS ---------- */
.btn{padding:13px 24px;border-radius:8px;font-size:14.5px;font-weight:600;transition:.2s;display:inline-block}
.btn-p{background:var(--cobalt);color:#fff}.btn-p:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,70,232,.3)}
.btn-g{border:1px solid var(--line);background:#fff;color:var(--ink)}.btn-g:hover{border-color:var(--cobalt);color:var(--cobalt)}

/* ---------- PAGE HEADER (sub-pages) ---------- */
.page{max-width:1100px;margin:0 auto;padding:56px 42px 90px}
.crumb{font-family:'Space Mono',monospace;font-size:12px;color:var(--muted);letter-spacing:.06em;margin-bottom:22px}
.crumb a:hover{color:var(--cobalt)}
.crumb span{color:var(--ink)}
.page-badge{font-family:'Space Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--cobalt);
  border:1px solid var(--line);background:#fff;display:inline-block;padding:6px 13px;border-radius:5px;margin-bottom:20px}
.page h1{font-size:clamp(34px,5vw,58px);font-weight:700;line-height:1.02;letter-spacing:-.03em;margin-bottom:18px}
.page h1 u{text-decoration:none;color:var(--cobalt)}
.page .lede{font-size:17px;color:var(--muted);max-width:620px;margin-bottom:40px}

/* ---------- SECTION HEAD ---------- */
.sec-head{display:flex;align-items:baseline;gap:16px;margin:50px 0 30px;border-bottom:2px solid var(--ink);padding-bottom:14px}
.sec-head .x{font-family:'Space Mono',monospace;font-size:13px;color:var(--cobalt)}
.sec-head h2{font-size:clamp(22px,3vw,32px);font-weight:700;letter-spacing:-.02em}

/* ---------- CARD GRID ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 24px;transition:.22s;
  display:flex;flex-direction:column;min-height:200px;position:relative}
.card .corner{position:absolute;top:14px;right:16px;font-family:'Space Mono',monospace;font-size:12px;color:var(--muted)}
.card:hover{border-color:var(--cobalt);transform:translateY(-5px);box-shadow:0 16px 38px rgba(20,19,15,.1)}
.card .ico{width:46px;height:46px;border-radius:11px;display:grid;place-items:center;margin-bottom:20px;background:#eef2fb;border:1px solid var(--line)}
.card .ico svg{width:23px;height:23px;stroke:var(--cobalt);fill:none;stroke-width:1.7}
.card h3{font-size:20px;font-weight:700;margin-bottom:8px}
.card p{font-size:13.5px;color:var(--muted);flex:1}
.card .go{margin-top:16px;font-family:'Space Mono',monospace;font-size:12px;color:var(--amber);text-transform:uppercase;letter-spacing:.06em}

/* ---------- ARTICLE / DEEP PAGE ---------- */
.article{max-width:760px}
.article h2{font-size:26px;font-weight:700;letter-spacing:-.02em;margin:42px 0 14px}
.article h3{font-size:19px;font-weight:600;margin:30px 0 10px}
.article p{font-size:16px;color:var(--ink);margin-bottom:16px}
.article ul{margin:0 0 16px 22px;color:var(--ink)}
.article li{margin-bottom:7px}
.spec-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px}
.spec-table td{border:1px solid var(--line);padding:11px 14px;background:#fff}
.spec-table td:first-child{font-family:'Space Mono',monospace;font-size:13px;color:var(--muted);width:38%}
.callout{background:#fff;border:1px solid var(--line);border-left:3px solid var(--amber);border-radius:8px;padding:18px 20px;margin:24px 0;font-size:15px}
figure{margin:26px 0}
figure img{width:100%;border:1px solid var(--line);border-radius:12px;display:block}
figcaption{font-family:'Space Mono',monospace;font-size:12px;color:var(--muted);margin-top:8px}

/* ---------- FOOTER ---------- */
footer{border-top:1px solid var(--line);padding:26px 42px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-family:'Space Mono',monospace;font-size:12px;color:var(--muted)}

@media(max-width:960px){.grid,.grid.cols-4{grid-template-columns:1fr 1fr}}
@media(max-width:560px){nav{padding:14px 20px}.navlinks a:not(.cta){display:none}
  .page{padding:40px 20px 70px}.grid,.grid.cols-4,.grid.cols-2{grid-template-columns:1fr}}

/* ============================================================
   HOMEPAGE-ONLY  (hero, black-hole sim, divisions row)
   Only the index page uses these.
   ============================================================ */
.hero{max-width:1300px;margin:0 auto;display:grid;grid-template-columns:.95fr 1.05fr;gap:40px;align-items:center;padding:60px 42px 80px}
.badge{font-family:'Space Mono',monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--cobalt);
  border:1px solid var(--line);background:#fff;display:inline-block;padding:6px 13px;border-radius:5px;margin-bottom:22px}
.hero h1{font-size:clamp(38px,5.2vw,70px);font-weight:700;line-height:1.0;letter-spacing:-.03em;margin-bottom:20px}
.hero h1 u{text-decoration:none;color:var(--cobalt)}
.hero .lede{font-size:17px;color:var(--muted);max-width:440px;margin-bottom:30px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}

.wf{position:relative;aspect-ratio:1.2;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:radial-gradient(circle at 50% 45%,#11132a,#070812 70%);cursor:crosshair;touch-action:none}
.wf canvas{position:absolute;inset:0;width:100%;height:100%}
.wf .tag{position:absolute;top:14px;left:16px;font-family:'Space Mono',monospace;font-size:11px;color:#9fb0d8;letter-spacing:.08em;z-index:3}
.wf .hint{position:absolute;bottom:14px;right:16px;font-family:'Space Mono',monospace;font-size:11px;color:rgba(159,176,216,.7);z-index:3}
.wf .spec{position:absolute;bottom:14px;left:16px;font-family:'Space Mono',monospace;font-size:11px;color:var(--amber);z-index:3}

/* black-hole settings panel */
.bh-panel{position:absolute;top:12px;right:12px;z-index:4;display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.bh-toggle{width:34px;height:34px;border-radius:8px;border:1px solid rgba(159,176,216,.3);background:rgba(10,12,24,.7);
  color:#cfe;font-size:16px;cursor:pointer;backdrop-filter:blur(6px);transition:.18s;line-height:1}
.bh-toggle:hover{border-color:var(--amber);color:var(--amber)}
.bh-controls{display:flex;flex-direction:column;gap:12px;background:rgba(9,11,22,.82);backdrop-filter:blur(10px);
  border:1px solid rgba(159,176,216,.22);border-radius:11px;padding:14px 14px 16px;width:188px;
  transform-origin:top right;transition:opacity .18s,transform .18s}
.bh-controls[hidden]{display:none}
.bh-controls label{display:flex;flex-direction:column;gap:7px;font-family:'Space Mono',monospace;font-size:10.5px;
  letter-spacing:.1em;color:#aebbe0}
.bh-controls output{color:var(--amber);float:right}
.bh-controls input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:3px;border-radius:3px;
  background:rgba(159,176,216,.25);outline:none;cursor:pointer}
.bh-controls input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;
  background:var(--amber);cursor:pointer;box-shadow:0 0 8px rgba(232,135,11,.6)}
.bh-controls input[type=range]::-moz-range-thumb{width:14px;height:14px;border:0;border-radius:50%;background:var(--amber);cursor:pointer}
.bh-clear{margin-top:2px;font-family:'Space Mono',monospace;font-size:10px;letter-spacing:.1em;color:#aebbe0;
  background:transparent;border:1px solid rgba(159,176,216,.3);border-radius:7px;padding:7px;cursor:pointer;transition:.18s}
.bh-clear:hover{border-color:#ff5a4d;color:#ff5a4d}

/* divisions row on the homepage */
.divisions{max-width:1300px;margin:0 auto;padding:20px 42px 100px}
.divisions .sec-head{margin-bottom:34px}
.divisions .sec-head h2{font-size:clamp(24px,3.4vw,38px)}
.divisions .card{min-height:258px}

@media(max-width:960px){.hero{grid-template-columns:1fr}.wf{order:-1;max-width:480px}}
@media(max-width:560px){.hero{padding:46px 20px 60px}.divisions{padding:20px 20px 70px}}
@media(prefers-reduced-motion:reduce){.wf canvas{display:none}}