/* vivll.com — shared stylesheet for content pages (/about, /gstat, /events, …).
   Reuses the home page's design tokens so sub-pages feel part of the same site.
   The flagship home page (index.html) keeps its own bespoke inline CSS + app.js;
   content pages are intentionally clean, fast and readable (no custom cursor). */

:root{
  --bg:#000000; --bg-2:#0E0E11; --panel:#1C1C1E; --panel-2:#2C2C2E; --panel-3:#3A3A3C;
  --text:#F5F5F7; --dim:#AEAEB2; --muted:#8E8E93;
  --accent:#0A84FF; --accent-2:#5E5CE6; --accent-3:#BF5AF2; --green:#30D158;
  --grad:linear-gradient(135deg,#0A84FF 0%,#5E5CE6 52%,#BF5AF2 100%);
  --line:rgba(255,255,255,.16); --line-soft:rgba(255,255,255,.085);
  --backdrop:rgba(22,22,24,.72);
  --glow1:rgba(10,132,255,.18); --glow2:rgba(94,92,230,.16); --glow3:rgba(191,90,242,.12);
  --shadow:0 30px 70px -32px rgba(0,0,0,.75); --shadow-sm:0 12px 30px -16px rgba(0,0,0,.6);
  --focus:#0A84FF; --blur:22px;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Segoe UI",system-ui,Roboto,sans-serif;
  --r-lg:28px; --r-md:20px; --r-sm:14px;
}
html[data-theme="light"]{
  --bg:#F2F2F7; --bg-2:#FFFFFF; --panel:#FFFFFF; --panel-2:#F2F2F7; --panel-3:#E5E5EA;
  --text:#1D1D1F; --dim:#43434A; --muted:#86868B;
  --accent:#0071E3; --accent-2:#5E5CE6; --accent-3:#A33BC2; --green:#34C759;
  --grad:linear-gradient(135deg,#0071E3 0%,#5E5CE6 52%,#A33BC2 100%);
  --line:rgba(0,0,0,.14); --line-soft:rgba(0,0,0,.075);
  --backdrop:rgba(255,255,255,.75);
  --glow1:rgba(0,113,227,.12); --glow2:rgba(94,92,230,.1); --glow3:rgba(163,59,194,.07);
  --shadow:0 30px 70px -34px rgba(0,0,0,.2); --shadow-sm:0 12px 30px -18px rgba(0,0,0,.16);
  --focus:#0071E3;
}
html[data-contrast="high"]{--text:#FFFFFF; --dim:#EDEDED; --muted:#C9C9CE; --accent:#4FA3FF; --line:rgba(255,255,255,.5); --line-soft:rgba(255,255,255,.3)}
html[data-theme="light"][data-contrast="high"]{--text:#000; --dim:#1A1A1A; --muted:#3A3A3C; --accent:#0040DD; --line:rgba(0,0,0,.6); --line-soft:rgba(0,0,0,.35)}
html[data-text="large"]{font-size:118.5%}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;background:var(--bg)}
html[data-motion="reduce"] *{scroll-behavior:auto !important}
body{background:var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased;
  line-height:1.6;letter-spacing:-.012em;overflow-x:hidden;min-height:100vh;display:flex;flex-direction:column}
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(1100px 720px at 78% -12%,var(--glow1),transparent 55%),
    radial-gradient(900px 680px at -6% 40%,var(--glow2),transparent 56%);}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
img{display:block;max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:6px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.wrap{position:relative;z-index:2;width:100%;max-width:900px;margin:0 auto;padding:0 clamp(20px,5vw,40px)}
.wrap-wide{max-width:1180px}
main{flex:1 0 auto}

/* skip link */
.skip{position:absolute;left:-999px;top:0;z-index:900;background:var(--panel);color:var(--text);padding:10px 16px;border-radius:10px;border:1px solid var(--line)}
.skip:focus{left:12px;top:12px}

/* nav */
nav.site{position:sticky;top:0;z-index:500;display:flex;align-items:center;gap:16px;
  padding:12px clamp(20px,5vw,40px);background:var(--backdrop);backdrop-filter:blur(var(--blur)) saturate(180%);
  -webkit-backdrop-filter:blur(var(--blur)) saturate(180%);border-bottom:1px solid var(--line-soft)}
html[data-transparency="reduce"] nav.site{background:var(--bg-2)}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);margin-right:auto}
.brand:hover{text-decoration:none}
.b-mark{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;color:#fff;font-weight:700;font-size:17px;
  background-image:linear-gradient(180deg,rgba(255,255,255,.22),rgba(255,255,255,0) 45%),var(--grad);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.3),0 6px 16px -8px var(--accent)}
.brand b{font-weight:700;font-size:16px;letter-spacing:-.02em;line-height:1}
.brand small{display:block;font-size:11px;color:var(--muted);margin-top:2px;font-weight:500}
.nav-links{position:absolute;top:calc(100% + 4px);right:clamp(16px,5vw,32px);left:auto;
  display:flex;flex-direction:column;align-items:stretch;gap:2px;min-width:200px;
  background:var(--backdrop);backdrop-filter:blur(var(--blur)) saturate(180%);-webkit-backdrop-filter:blur(var(--blur)) saturate(180%);
  border:1px solid var(--line);border-radius:16px;padding:12px;box-shadow:var(--shadow);
  opacity:0;transform:translateY(-8px);pointer-events:none;transition:opacity .24s,transform .24s}
.nav-links a{font-size:15px;font-weight:500;color:var(--dim);padding:10px 12px;border-radius:10px}
.nav-links a:hover{color:var(--text);text-decoration:none;background:var(--panel-2)}
.nav-links a[aria-current="page"]{color:var(--text);background:var(--panel-2)}
.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-cta{color:#fff;padding:8px 16px;border-radius:980px;font-weight:600;
  background-image:linear-gradient(180deg,rgba(255,255,255,.2),rgba(255,255,255,0) 45%),var(--grad);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.25),0 8px 18px -10px var(--accent)}
.nav-cta:hover{filter:brightness(1.06);text-decoration:none;color:#fff}
.nav-burger{display:grid;width:38px;height:38px;border-radius:50%;border:1px solid var(--line-soft);background:var(--panel);color:var(--text);place-items:center;cursor:pointer}
.nav-burger:hover{border-color:var(--line);background:var(--panel-2)}
#themeBtn{width:38px;height:38px;border-radius:50%;border:1px solid var(--line-soft);background:var(--panel);color:var(--text);display:grid;place-items:center;cursor:pointer}
#themeBtn:hover{border-color:var(--line);background:var(--panel-2)}
html[data-transparency="reduce"] .nav-links{background:var(--bg-2)}
nav.site.nav-open .nav-links{opacity:1;transform:none;pointer-events:auto}
@media(max-width:760px){.brand small{display:none}}

/* page header */
.page-head{padding:clamp(40px,7vw,72px) 0 clamp(24px,4vw,36px)}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:20px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.crumbs a{color:var(--muted)} .crumbs a:hover{color:var(--text)}
.crumbs .sep{opacity:.5}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--accent);margin-bottom:16px}
.eyebrow .ed{width:7px;height:7px;border-radius:50%;background:var(--grad)}
h1.page-title{font-weight:700;font-size:clamp(30px,6vw,54px);line-height:1.05;letter-spacing:-.035em}
.lede{font-size:clamp(17px,2.1vw,21px);line-height:1.55;color:var(--dim);margin-top:20px;max-width:64ch}
.updated{font-size:13px;color:var(--muted);margin-top:22px;display:inline-flex;align-items:center;gap:8px}
.updated .ed{width:6px;height:6px;border-radius:50%;background:var(--green)}

/* prose */
.prose{padding:8px 0 clamp(40px,6vw,64px);max-width:70ch}
.prose.wide{max-width:none}
.prose h2{font-weight:700;font-size:clamp(22px,3.4vw,32px);line-height:1.15;letter-spacing:-.028em;margin:44px 0 14px}
.prose h3{font-weight:600;font-size:clamp(18px,2.4vw,22px);letter-spacing:-.02em;margin:30px 0 10px}
.prose p{color:var(--dim);font-size:16.5px;line-height:1.72;margin:0 0 16px}
.prose p strong,.prose li strong{color:var(--text);font-weight:600}
.prose ul,.prose ol{color:var(--dim);font-size:16.5px;line-height:1.7;margin:0 0 18px;padding-left:22px}
.prose li{margin:0 0 9px}
.prose a{font-weight:500}
.prose blockquote{border-left:3px solid var(--accent);background:var(--panel);border-radius:0 14px 14px 0;
  padding:16px 22px;margin:22px 0;color:var(--text);font-size:18px;font-weight:500}
.prose blockquote cite{display:block;font-size:13px;color:var(--muted);font-weight:500;font-style:normal;margin-top:10px}
.prose hr{border:0;border-top:1px solid var(--line-soft);margin:36px 0}
.answer-first{font-size:clamp(17px,2vw,20px);line-height:1.6;color:var(--text);font-weight:500;
  border:1px solid var(--line-soft);background:var(--panel);border-radius:var(--r-md);padding:22px 24px;margin:0 0 26px}

/* cards grid */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:8px 0 26px}
.card{border:1px solid var(--line-soft);border-radius:var(--r-md);background:var(--panel);padding:24px;transition:border-color .3s,box-shadow .3s,transform .3s}
.card:hover{border-color:var(--line);box-shadow:var(--shadow-sm);transform:translateY(-3px)}
.card .num{font-weight:700;font-size:24px;line-height:1}
.card h3{font-weight:600;font-size:19px;letter-spacing:-.02em;margin:12px 0 8px}
.card p{color:var(--dim);font-size:14.5px;line-height:1.6;margin:0}
.card a.card-link{display:inline-flex;gap:6px;margin-top:12px;font-size:13.5px;font-weight:600}

/* tags */
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 26px}
.tags span{font-size:12.5px;font-weight:500;color:var(--dim);border:1px solid var(--line-soft);padding:6px 13px;border-radius:980px;background:var(--panel)}

/* event / timeline list */
.tl{display:flex;flex-direction:column;gap:12px;margin:8px 0 26px}
.tl-item{border:1px solid var(--line-soft);border-radius:var(--r-md);background:var(--panel);padding:20px 22px;
  display:grid;grid-template-columns:104px 1fr auto;gap:20px;align-items:start}
.tl-item.lead{background-image:linear-gradient(120deg,var(--glow1),var(--glow2))}
.tl-date{font-weight:700;font-size:15px} .tl-date small{display:block;font-size:12px;color:var(--muted);font-weight:500;margin-top:2px}
.tl-body h3{font-weight:600;font-size:18px;letter-spacing:-.02em;margin:0 0 6px}
.tl-body p{color:var(--dim);font-size:14.5px;line-height:1.6;margin:6px 0 0}
.tl-loc{font-size:13px;color:var(--muted)}
.tl-tag{font-size:12px;font-weight:600;color:var(--dim);border:1px solid var(--line-soft);padding:6px 12px;border-radius:980px;white-space:nowrap}
.tl-tag.solid{color:#fff;border:none;background-image:linear-gradient(180deg,rgba(255,255,255,.2),rgba(255,255,255,0) 45%),var(--grad)}
@media(max-width:640px){.tl-item{grid-template-columns:1fr;gap:8px}.tl-tag{justify-self:start}}

/* faq */
.faq{display:flex;flex-direction:column;gap:2px;margin:8px 0 26px;border:1px solid var(--line-soft);border-radius:var(--r-md);overflow:hidden}
.faq details{border-bottom:1px solid var(--line-soft);background:var(--panel)}
.faq details:last-child{border-bottom:0}
.faq summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:600;font-size:16.5px;letter-spacing:-.015em;
  display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-weight:700;font-size:22px;line-height:1;flex:none;transition:transform .3s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .faq-a{padding:0 22px 20px;color:var(--dim);font-size:15.5px;line-height:1.7}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:15px;padding:13px 22px;border-radius:980px;
  border:1px solid var(--line-soft);background:var(--panel-2);color:var(--text);cursor:pointer;transition:all .25s}
.btn:hover{text-decoration:none;border-color:var(--line)}
.btn.solid{border:none;color:#fff;background-image:linear-gradient(180deg,rgba(255,255,255,.22),rgba(255,255,255,0) 42%),var(--grad);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.28),0 10px 26px -12px var(--accent)}
.btn.solid:hover{filter:brightness(1.06);transform:translateY(-2px)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin:6px 0 8px}

/* callout */
.callout{border:1px solid var(--line-soft);background:var(--panel);border-radius:var(--r-md);padding:20px 24px;margin:22px 0}
.callout .k{font-size:12px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.04em;margin-bottom:8px}

/* related / next */
.related{border-top:1px solid var(--line-soft);padding:32px 0 8px;margin-top:16px}
.related .rl-h{font-size:13px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:16px}
.related .rl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.related a.rl{border:1px solid var(--line-soft);border-radius:var(--r-sm);background:var(--panel);padding:16px 18px;color:var(--text);
  display:flex;justify-content:space-between;align-items:center;gap:12px;font-weight:600;font-size:15px}
.related a.rl:hover{border-color:var(--accent);text-decoration:none}
.related a.rl span{color:var(--muted);font-weight:400}

/* portrait / figures */
figure{margin:0 0 22px}
figure.portrait{max-width:280px}
figure .frame{border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm);background:var(--panel)}
figcaption{font-size:12.5px;color:var(--muted);margin-top:11px;line-height:1.5}
.media-grid{display:grid;grid-template-columns:280px 1fr;gap:clamp(24px,5vw,48px);align-items:start;margin:8px 0 26px}
@media(max-width:720px){.media-grid{grid-template-columns:1fr}figure.portrait{margin-inline:auto}}

/* footer */
footer.site{flex:none;border-top:1px solid var(--line-soft);padding:52px 0 44px;margin-top:40px;position:relative;z-index:2}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.foot-grid .fcol h4{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:14px}
.foot-grid .fcol a{display:block;color:var(--dim);font-size:14.5px;margin-bottom:9px}
.foot-grid .fcol a:hover{color:var(--text);text-decoration:none}
.foot-grid .fcol p{color:var(--dim);font-size:14px;line-height:1.6;max-width:34ch}
.foot-meta{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;margin-top:36px;padding-top:22px;border-top:1px solid var(--line-soft);font-size:13px;color:var(--muted)}
@media(max-width:720px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.foot-grid{grid-template-columns:1fr}}