/* ai119 — minimal holding site. Brand system mirrors the ai119 marketing site. */
:root{
  --bg:#ffffff;--bg-2:#f4f8f9;--panel:#ffffff;--line:rgba(13,42,54,.10);--line-strong:rgba(13,42,54,.22);
  --ink:#0b1c26;--ink-2:#43606f;--muted:#61798a;
  --accent:#17c3b2;--accent-strong:#10ad9d;--accent-text:#0a8375;--accent-glow:rgba(23,195,178,.16);--on-accent:#04211d;
  --header-bg:rgba(255,255,255,.88);--hero-tint-1:rgba(23,195,178,.10);--hero-tint-2:rgba(23,109,195,.06);--gridline:rgba(13,42,54,.05);
  --ok:#0c7a3a;--err:#b42318;
  --font-display:"Space Grotesk","Segoe UI",system-ui,sans-serif;
  --font-body:"Inter","Segoe UI",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","Cascadia Mono",Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#060b11;--bg-2:#0a1219;--panel:#0e1822;--line:rgba(151,183,197,.14);--line-strong:rgba(151,183,197,.26);
  --ink:#eef4f6;--ink-2:#a7b8c2;--muted:#6f8494;--accent-strong:#2ee6d2;--accent-text:#2ee6d2;
  --header-bg:rgba(6,11,17,.86);--hero-tint-2:rgba(23,109,195,.07);--gridline:rgba(151,183,197,.05);--ok:#5ec27c;--err:#ff8a80;
}}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--accent-text);text-decoration:none}a:hover{color:var(--accent-strong)}
h1,h2,h3{font-family:var(--font-display);font-weight:600;line-height:1.1;letter-spacing:-.01em}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:var(--header-bg);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{max-width:1180px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;gap:26px}
.brand{display:flex;align-items:center;gap:11px;margin-right:auto}
.tile-mini{width:34px;height:34px;border:1.5px solid var(--accent);border-radius:6px;display:grid;place-items:center;font-family:var(--font-display);font-weight:700;font-size:15px;color:#2ee6d2;position:relative;background:linear-gradient(145deg,#0d1a24,#081019 70%)}
.tile-mini::before{content:"119";position:absolute;top:2px;right:4px;font-family:var(--font-mono);font-size:6.5px;font-weight:500;color:#a7b8c2;line-height:1}
.wordmark{font-family:var(--font-display);font-weight:700;font-size:21px;color:var(--ink);letter-spacing:-.02em}
.wordmark span{color:var(--accent-text)}
.nav-links{display:flex;gap:24px;list-style:none}
.nav-links a{font-size:14.5px;font-weight:500;color:var(--ink-2)}.nav-links a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-size:15px;font-weight:600;padding:12px 22px;border-radius:8px;border:1px solid transparent;cursor:pointer;transition:all .18s;white-space:nowrap}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:var(--accent-strong);color:var(--on-accent);transform:translateY(-1px);box-shadow:0 8px 28px var(--accent-glow)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{color:var(--accent-text);border-color:var(--accent)}
.nav .btn{padding:9px 16px;font-size:14px}

/* Hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:radial-gradient(900px 480px at 78% 30%,var(--hero-tint-1),transparent 62%),radial-gradient(700px 500px at 12% 85%,var(--hero-tint-2),transparent 60%),var(--bg)}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(var(--gridline) 1px,transparent 1px),linear-gradient(90deg,var(--gridline) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 80% 70% at 60% 40%,black 30%,transparent 75%);pointer-events:none}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;min-height:calc(100vh - 68px);min-height:calc(100svh - 68px);padding:72px 24px}
.eyebrow{font-family:var(--font-mono);font-size:12px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--accent-text);display:flex;align-items:center;gap:10px;margin-bottom:18px}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--accent-text);opacity:.7}
.hero h1{font-size:clamp(38px,5.6vw,66px);margin-bottom:22px}
.hero h1 .accent{color:var(--accent-text)}
.lede{font-size:18.5px;color:var(--ink-2);max-width:50ch;margin-bottom:34px}
.ctas{display:flex;gap:14px;flex-wrap:wrap}
.hero-note{margin-top:26px;font-family:var(--font-mono);font-size:12.5px;color:var(--muted);letter-spacing:.04em}

/* Element tile — brand mark (always dark) */
.element-stage{position:relative;display:grid;place-items:center;min-height:440px}
.orbit{position:absolute;border:1px solid rgba(23,195,178,.28);border-radius:50%;animation:spin 46s linear infinite}
.orbit.o1{width:320px;height:320px}
.orbit.o2{width:430px;height:430px;animation-duration:74s;animation-direction:reverse}
.orbit .dot{position:absolute;top:-4px;left:50%;width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
.orbit .dot.d2{top:auto;bottom:-3px;left:22%;background:var(--muted);box-shadow:none;width:6px;height:6px}
@keyframes spin{to{transform:rotate(360deg)}}
.element-tile{position:relative;width:216px;height:216px;border:2px solid #17c3b2;border-radius:16px;background:linear-gradient(160deg,#0d1a24,#081019 70%);
  box-shadow:0 0 0 1px rgba(23,195,178,.12),0 22px 70px rgba(4,16,25,.45),0 0 90px rgba(23,195,178,.14);padding:18px 20px;display:flex;flex-direction:column;animation:floaty 7s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.element-tile .z{font-family:var(--font-mono);font-size:15px;color:#a7b8c2;align-self:flex-end}
.element-tile .sym{font-family:var(--font-display);font-size:86px;font-weight:700;line-height:1;color:#eef4f6;margin:auto 0 6px}
.element-tile .sym b{color:#2ee6d2;font-weight:700}
.element-tile .name{font-family:var(--font-mono);font-size:12px;letter-spacing:.34em;text-transform:uppercase;color:#17c3b2}
.element-tile .mass{font-family:var(--font-mono);font-size:11px;color:#6f8494;margin-top:4px}
@media (prefers-reduced-motion:reduce){.orbit,.element-tile{animation:none}}

/* Sections */
.section{padding:96px 0;border-bottom:1px solid var(--line)}
.section.alt{background:var(--bg-2)}
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:start}
.split h2{font-size:clamp(28px,3.6vw,42px);margin-bottom:16px}
.split p.sub{color:var(--ink-2);font-size:17px;max-width:44ch}
.intro-list{list-style:none;margin-top:26px;display:grid;gap:10px}
.intro-list li{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;color:var(--muted);padding-left:20px;position:relative}
.intro-list li::before{content:"▪";color:var(--accent);position:absolute;left:2px;font-size:11px}

/* Form card */
.form-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:34px;box-shadow:0 14px 40px rgba(11,28,38,.08)}
.topics{border:0;display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px}
.topics legend{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;width:100%}
.topics label{cursor:pointer}
.topics input{position:absolute;opacity:0;pointer-events:none}
.topics span{display:inline-block;padding:9px 16px;border:1px solid var(--line-strong);border-radius:999px;font-size:14px;font-weight:500;color:var(--ink-2);transition:all .15s}
.topics label:hover span{border-color:var(--accent)}
.topics input:checked+span{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.topics input:focus-visible+span{box-shadow:0 0 0 3px rgba(23,195,178,.3)}
[hidden]{display:none!important}
.careers-embed{display:flex;flex-direction:column;gap:12px}
.careers-embed{padding:6px 0 4px}
.apply-title{font-size:22px}
.careers-embed .form-foot{margin-top:6px}
.embed-note,.embed-alt{font-size:14px;color:var(--ink-2)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.field input,.field select,.field textarea{background:var(--bg-2);border:1px solid var(--line-strong);border-radius:8px;color:var(--ink);font-family:var(--font-body);font-size:15px;padding:12px 14px;width:100%;transition:border-color .15s,box-shadow .15s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(23,195,178,.14)}
.field input[type=file]{padding:10px}
.form-foot{display:flex;align-items:center;gap:18px;margin-top:22px;flex-wrap:wrap}
.status{font-size:14px;min-height:20px}.status.ok{color:var(--ok)}.status.err{color:var(--err)}
.btn[disabled]{opacity:.55;cursor:wait}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}

/* Footer */
.site-footer{padding:40px 0;font-size:13.5px;color:var(--muted)}
.site-footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
.site-footer nav{display:flex;gap:22px;flex-wrap:wrap}
.site-footer a{color:var(--ink-2)}.site-footer a:hover{color:var(--accent-text)}
.tagline{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:12px}

/* Privacy page */
.doc{max-width:760px;margin:0 auto;padding:72px 24px 56px}
.doc h1{font-size:40px;margin-bottom:20px}.doc h2{font-size:20px;margin:30px 0 8px}
.doc p{color:var(--ink-2);margin-bottom:12px}

@media (max-width:860px){
  .nav-links{display:none}
  .hero-inner{grid-template-columns:1fr;min-height:0;padding:48px 16px 64px;gap:12px}
  .element-stage{min-height:320px;order:-1;transform:scale(.82)}
  .split{grid-template-columns:1fr;gap:30px}
  .form-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
  .wrap,.nav{padding:0 16px}
  .form-card{padding:24px 18px}
}