/* Tron Talk pre-launch site. System fonts only: no third-party requests. */
:root{
  --bg:#050505;--panel:#0e0f12;--panel2:#15171b;--line:#26292f;--text:#f2f3f5;--muted:#a3a9b3;
  --accent:#ff4500;--accent-ink:#050505;--focus:#ff8a5c;
  --display:"Barlow Condensed","Bahnschrift","Arial Narrow","Roboto Condensed","Helvetica Neue Condensed",system-ui,sans-serif;
  --body:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
:root[data-theme="light"]{
  --bg:#f6f5f2;--panel:#ffffff;--panel2:#ecebe7;--line:#d3d1ca;--text:#101114;--muted:#4b5058;
  --accent:#d83a00;--accent-ink:#ffffff;--focus:#d83a00;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 var(--body);-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;height:auto;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:8px;top:-60px;background:var(--accent);color:var(--accent-ink);padding:10px 14px;z-index:99}
.skip:focus{top:8px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}

/* type */
h1,h2,h3,h4{font-family:var(--display);text-transform:uppercase;letter-spacing:-.01em;line-height:1;margin:0;font-weight:800}
h1{font-size:clamp(2.6rem,8vw,5rem)}
h2{font-size:clamp(2rem,5vw,3.2rem);font-weight:700}
.h3{font-size:1.7rem;font-weight:700;font-family:var(--display);text-transform:uppercase;line-height:1.05;margin:0}
h3{font-size:1.5rem;font-weight:700}
h4{font-size:1.1rem;font-weight:700}
p{margin:0 0 1em}
.eyebrow{font-size:.75rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin:0 0 .8em}
.eyebrow.hot{color:var(--accent)}
.lead{font-size:1.15rem;color:var(--muted);max-width:40rem}
.muted{color:var(--muted)}
.num{font-family:var(--display);font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:20px;height:64px}
.brand{white-space:nowrap;display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-weight:800;font-size:1.35rem;text-transform:uppercase;letter-spacing:.02em}
.nav{display:flex;gap:4px;margin-left:12px}
.nav a{text-decoration:none;padding:8px 12px;font-size:.9rem;color:var(--muted);border-radius:2px}
.nav a:hover,.nav a[aria-current]{color:var(--text)}
.nav a[aria-current]{box-shadow:inset 0 -2px 0 var(--accent)}
.bar-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{background:none;border:1px solid var(--line);color:var(--text);width:40px;height:40px;border-radius:2px;font-size:1.1rem;cursor:pointer}
.icon-btn:hover{border-color:var(--accent)}
.menu-btn{display:none}
@media (max-width:760px){
  .menu-btn{display:inline-block}
  .nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;padding:8px 20px 16px;margin:0}
  .nav.open{display:flex}
  .nav a{padding:14px 4px;border-bottom:1px solid var(--line)}
  .bar-actions .btn-sm{display:none}
}

/* buttons / forms */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;background:var(--accent);color:var(--accent-ink);border:0;border-radius:2px;font:700 1rem var(--display);text-transform:uppercase;letter-spacing:.06em;text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.1)}
.btn-sm{min-height:40px;padding:0 16px;font-size:.9rem}
.btn-ghost{background:none;color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);filter:none}
.btn[disabled]{opacity:.6;cursor:wait}
.field-row{display:flex;gap:8px}
.field-row input{flex:1;min-width:0;min-height:48px;padding:0 14px;background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:2px;font:1rem var(--body)}
.field-row input:focus{border-color:var(--accent)}
@media (max-width:480px){.field-row{flex-direction:column}}
.finish{border:0;padding:0;margin:12px 0 0;font-size:.85rem;color:var(--muted)}
.finish legend{padding:0;margin-bottom:6px}
.finish label{margin-right:16px;cursor:pointer}
.consent{font-size:.78rem;color:var(--muted);margin:12px 0 0;line-height:1.5}
.form-msg{min-height:1.4em;margin:10px 0 0;font-size:.9rem}
.form-msg.ok{color:#4ade80}
:root[data-theme="light"] .form-msg.ok{color:#15803d}
.form-msg.err{color:#f87171}
:root[data-theme="light"] .form-msg.err{color:#b91c1c}

/* layout blocks */
section{padding:72px 0;border-bottom:1px solid var(--line)}
section.tight{padding:48px 0}
.hero{padding:56px 0 72px}
.hero-grid{display:grid;gap:40px;grid-template-columns:1fr}
@media (min-width:900px){.hero-grid{grid-template-columns:1fr 1.1fr;align-items:center;gap:56px}}
.hero p.lead{margin-top:20px}
.hero .waitlist-form{margin-top:28px;max-width:30rem}
.tag-line{margin-top:18px;font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.cols{display:grid;gap:40px}
@media (min-width:900px){.cols.two{grid-template-columns:1fr 1fr;align-items:center;gap:64px}}
.grid-b{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.grid-b>*{background:var(--bg)}
@media (min-width:760px){.grid-b.three{grid-template-columns:repeat(3,1fr)}.grid-b.two{grid-template-columns:repeat(2,1fr)}}
@media (min-width:560px) and (max-width:759px){.grid-b.three,.grid-b.auto{grid-template-columns:repeat(2,1fr)}}
.cell{padding:28px}
.step-n{font-size:3.4rem;color:var(--accent);line-height:1}
.panel{background:var(--panel);border:1px solid var(--line)}
.figure{background:#0b0e13;border:1px solid var(--line);padding:0}
.figure img{width:100%}
.figcap{font-size:.78rem;color:var(--muted);margin-top:10px}

/* thickness widget */
.tc{background:var(--panel);border:1px solid var(--line);padding:20px}
.tc-stage{position:relative;aspect-ratio:600/300}
.tc-stage svg{width:100%;height:100%}
.tc-readout{display:flex;align-items:baseline;gap:12px;margin:8px 0 14px;flex-wrap:wrap}
.tc-readout .num{font-size:3.4rem;color:var(--accent);line-height:1}
.tc-seg{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;border:0;padding:0;margin:0}
.tc-seg label{display:block;position:relative}
.tc-seg input{position:absolute;opacity:0;inset:0;cursor:pointer}
.tc-seg span{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:54px;padding:6px;border:1px solid var(--line);background:var(--panel2);font-size:.82rem;text-align:center;line-height:1.2}
.tc-seg b{font-family:var(--display);font-size:1.1rem;text-transform:uppercase}
.tc-seg input:checked+span{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.tc-seg input:focus-visible+span{outline:2px solid var(--focus);outline-offset:2px}
.tc-note{font-size:.76rem;color:var(--muted);margin:12px 0 0}

/* tiers */
.tier{display:flex;flex-direction:column;padding:28px}
.tier .price{font-size:4rem;line-height:1}
.tier .thick{font-size:2rem;color:var(--accent);margin:6px 0 0}
.tier ul{list-style:none;padding:0;margin:16px 0;color:var(--muted);font-size:.92rem;flex:1}
.tier li{padding-left:22px;position:relative;margin:7px 0}
.tier li:before{content:"";position:absolute;left:0;top:.8em;width:12px;height:1px;background:var(--accent)}
.tier .profile{margin:14px 0 4px;height:64px;display:flex;align-items:flex-end}
.tier details{margin-top:6px}
.tier summary{list-style:none;cursor:pointer}
.tier summary::-webkit-details-marker{display:none}
.tier .waitlist-form{margin-top:14px}
.nudge{border-left:2px solid var(--accent);padding-left:12px;font-size:.8rem;color:var(--muted)}
.callout{border:2px solid var(--accent);background:var(--panel);padding:32px}
@media (min-width:760px){.callout{padding:44px}}

/* tables */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:.92rem}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--display);text-transform:uppercase;font-size:1.05rem;letter-spacing:.02em}
td:first-child{color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;width:11rem}
tr:last-child td{border-bottom:0}

/* faq */
.faq-item{border-bottom:1px solid var(--line);padding:6px 0}
.faq-item summary{cursor:pointer;font-family:var(--display);text-transform:uppercase;font-weight:700;font-size:1.3rem;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";color:var(--accent)}
.faq-item[open] summary:after{content:"−"}
.faq-item p{color:var(--muted);max-width:44rem}

/* footer */
.site-footer{padding:56px 0 40px}
.foot-grid{display:grid;gap:40px}
@media (min-width:800px){.foot-grid{grid-template-columns:1.4fr 1fr}}
.site-footer .waitlist-form{margin-top:18px;max-width:30rem}
.foot-links{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-content:start}
.foot-links a{color:var(--muted);text-decoration:none;font-size:.92rem}
.foot-links a:hover{color:var(--accent)}
.fine{margin-top:40px;font-size:.76rem;color:var(--muted);max-width:52rem}
.prose{max-width:46rem}
.prose h2{font-size:1.7rem;margin:2.2em 0 .6em}
.prose li{margin:.4em 0;color:var(--muted)}
.prose p{color:var(--muted)}
.todo{border:2px dashed var(--line);padding:22px;color:var(--muted);font-size:.9rem}
.draft{color:var(--accent);font-size:.75rem;letter-spacing:.14em;text-transform:uppercase}