:root{
  --bg:#060609;
  --card:rgba(13,13,20,.72);
  --line:#1E1E2A;
  --text:#E9E9EE;
  --dim:#8B8B96;
  --blue:#4D7CFF;        /* electric blue accent */
  --blue-deep:#2E49E0;
  --violet:#7C5CFF;
  --maxw:980px;
  --mono:'JetBrains Mono','SF Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--mono);
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
::selection{background:var(--blue);color:#060609}
a{color:inherit}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:1}

/* ===== snake canvas (fixed, behind everything) ===== */
#snake{
  position:fixed;inset:0;width:100%;height:100%;
  z-index:0;pointer-events:none;display:block;
  opacity:.8;
}

/* ===== nav: tabs only ===== */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(6,6,9,.8);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-in{
  max-width:var(--maxw);margin:0 auto;padding:16px 28px;
  display:flex;gap:30px;
}
.nav-in a{
  text-decoration:none;font-size:13px;color:var(--dim);
  letter-spacing:.05em;
}
.nav-in a:hover{color:var(--text)}

/* ===== hero ===== */
.hero{
  position:relative;z-index:1;
  min-height:86vh;
  display:flex;align-items:center;justify-content:center;
  text-align:center;
}
.hero-core{padding:60px 24px;display:flex;flex-direction:column;align-items:center}
.hero-mark{
  font-family:'Space Grotesk',var(--mono);
  font-weight:700;
  font-size:clamp(62px,12vw,136px);
  line-height:1;letter-spacing:.01em;
  margin-bottom:26px;
  position:relative;
  cursor:default;
  color:var(--ink);            /* white KASTOV — the "AI" is theme blue below */
}
/* "AI" in the KASTOVAI wordmark — smaller than KASTOV, theme blue, sitting on
   the baseline so its bottom is flush with KASTOV. */
.ai{ font-size:0.6em; font-weight:700; letter-spacing:0; vertical-align:baseline; color:var(--blue); }
.hero-mark .ai{ font-size:0.5em; }
.hm-glow{ /* cursor-following blue light inside the (white) letterforms */
  position:absolute;inset:0;
  color:transparent;
  background:radial-gradient(150px circle at var(--mx,-300px) var(--my,-300px),
    rgba(77,124,255,1), rgba(124,92,255,.55) 45%, transparent 72%);
  -webkit-background-clip:text;background-clip:text;
  pointer-events:none;
}
.hm-glow .ai{ color:transparent; }   /* keep the glow layer fully gradient-clipped */
.hero-line{font-size:clamp(15px,1.8vw,19px);font-weight:500;margin-bottom:14px}
.hero-sub{font-size:13.5px;color:var(--dim);max-width:46em;margin-bottom:40px}
.btn{
  display:inline-flex;align-items:center;
  font-family:var(--mono);font-weight:700;font-size:14px;
  letter-spacing:.04em;
  background:var(--blue);color:#060609;
  border:1px solid var(--blue);border-radius:4px;
  padding:13px 30px;text-decoration:none;cursor:pointer;
  transition:background .15s ease,border-color .15s ease;
}
.btn:hover{background:#6B92FF;border-color:#6B92FF}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{background:transparent;color:var(--blue);border-color:var(--blue)}

/* ===== sections ===== */
.section{padding:100px 0;position:relative;z-index:1}
.sec-head{margin-bottom:48px;max-width:680px}
.kicker{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.h2{font-size:clamp(22px,2.8vw,32px);font-weight:800;margin-bottom:14px;line-height:1.3}
.sec-sub{font-size:14px;color:var(--dim);max-width:46em}

/* ===== how it works ===== */
.steps{display:flex;flex-direction:column;gap:0;border-left:1px solid var(--line);max-width:640px}
.step{padding:6px 0 30px 28px;position:relative}
.step::before{
  content:"";position:absolute;left:-5px;top:14px;
  width:9px;height:9px;border-radius:50%;
  background:var(--bg);border:2px solid var(--blue);
}
.step h3{font-size:15px;font-weight:700;margin-bottom:6px}
.step p{font-size:13.5px;color:var(--dim);max-width:42em}

/* ===== features ===== */
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.feat{
  border:1px solid var(--line);border-radius:6px;background:var(--card);
  backdrop-filter:blur(3px);
  padding:26px 28px;min-width:0;
}
.feat h3{font-size:14.5px;font-weight:700;margin-bottom:8px}
.feat p{font-size:13px;color:var(--dim)}

/* ===== live ===== */
.live-points{list-style:none;display:flex;flex-direction:column;gap:14px;max-width:600px}
.live-points li{display:flex;gap:14px;font-size:13.5px;color:var(--dim)}
.live-points li::before{content:">";color:var(--blue);font-weight:700}
.live-points li strong{color:var(--text);font-weight:700}

/* ===== pricing ===== */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.plan{
  border:1px solid var(--line);border-radius:6px;background:var(--card);
  backdrop-filter:blur(3px);
  padding:30px 28px;display:flex;flex-direction:column;position:relative;
}
.plan-pop{border-color:var(--blue)}
.plan h3{font-size:15px;font-weight:700;margin-bottom:4px}
.plan .who{font-size:12px;color:var(--dim);margin-bottom:20px}
.plan .price{font-size:34px;font-weight:800;line-height:1;margin-bottom:4px}
.plan .per{font-size:11.5px;color:var(--dim);margin-bottom:22px}
.plan ul{list-style:none;display:flex;flex-direction:column;gap:9px;margin-bottom:28px}
.plan li{display:flex;gap:9px;font-size:12.5px;color:var(--dim);align-items:baseline}
.plan li::before{content:">";color:var(--blue);font-weight:700}
.plan .btn{margin-top:auto;justify-content:center;font-size:13px;padding:11px 20px}

/* ===== faq ===== */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px 48px}
.faq h3{font-size:13.5px;font-weight:700;margin-bottom:6px}
.faq p{font-size:13px;color:var(--dim)}

/* ===== final ===== */
.final{text-align:center;padding:120px 28px;position:relative;z-index:1}
.final h2{font-size:clamp(20px,2.6vw,30px);font-weight:800;margin-bottom:28px}

/* ===== footer ===== */
footer{
  border-top:1px solid var(--line);padding:34px 0;
  position:relative;z-index:1;background:rgba(6,6,9,.8);
}
.foot-in{
  max-width:var(--maxw);margin:0 auto;padding:0 28px;
  display:flex;align-items:center;gap:26px;flex-wrap:wrap;
}
.foot-in a{color:var(--dim);text-decoration:none;font-size:12.5px}
.foot-in a:hover{color:var(--text)}
.foot-in .spacer{flex:1}
.foot-note{font-size:11.5px;color:var(--dim)}

/* ===== responsive ===== */
@media (max-width:860px){
  .feat-grid{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr;max-width:420px}
  .faq-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .section{padding:72px 0}
  .nav-in{gap:16px;overflow-x:auto}
  .nav-in a{white-space:nowrap;font-size:12px}
  #snake{opacity:.45}
}

/* ===== auth + checkout pages (share the site identity) ===== */
.auth-main{position:relative;z-index:1;min-height:calc(100vh - 110px);
  display:flex;align-items:center;justify-content:center;padding:60px 24px}
.auth-box{width:100%;max-width:440px}
.auth-eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue);
  margin-bottom:14px;text-align:center}
.auth-title{font-family:'Space Grotesk',var(--mono);font-weight:700;
  font-size:clamp(30px,5vw,42px);line-height:1.05;text-align:center;margin-bottom:12px}
.auth-sub{font-size:13.5px;color:var(--dim);text-align:center;max-width:34em;
  margin:0 auto 30px;line-height:1.6}
.auth-sub b{color:var(--text)}
.card-box{border:1px solid var(--line);border-radius:6px;background:var(--card);
  backdrop-filter:blur(3px);padding:30px}
.card-box.pop{border-color:var(--blue)}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:14px}
.field label{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.input{width:100%;background:rgba(0,0,0,.35);border:1px solid var(--line);border-radius:4px;
  color:var(--text);font-family:var(--mono);font-size:14px;padding:13px 15px;outline:none;
  transition:border-color .15s ease,box-shadow .15s ease}
.input::placeholder{color:#5c5c68}
.input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(77,124,255,.18)}
.btn-block{width:100%;justify-content:center;margin-top:6px}
.auth-alt{font-size:12.5px;color:var(--dim);text-align:center;margin-top:16px}
.auth-alt a{color:var(--blue);text-decoration:none}
.auth-alt a:hover{text-decoration:underline}
.auth-err{font-size:12.5px;color:#ff7a7a;margin:4px 0 10px;text-align:center}
.auth-fine{font-size:11.5px;color:#5c5c68;text-align:center;margin-top:12px;line-height:1.6}

/* checkout summary card */
.co-head{display:flex;align-items:flex-start;justify-content:space-between;
  padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:18px}
.co-plan{font-family:'Space Grotesk',var(--mono);font-weight:700;font-size:19px}
.co-billing{font-size:12px;color:var(--dim);margin-top:3px}
.co-price{font-family:'Space Grotesk',var(--mono);font-weight:800;font-size:30px;white-space:nowrap}
.co-price span{font-size:13px;font-weight:500;color:var(--dim)}
.co-feats{list-style:none;margin:0 0 18px;padding:0;display:flex;flex-direction:column;gap:11px}
.co-feats li{font-size:13px;color:var(--text);display:flex;gap:10px;align-items:baseline}
.co-feats li::before{content:">";color:var(--blue);font-weight:700}
.co-feats .co-sub{display:block;font-size:11.5px;color:var(--dim);margin-top:3px}
.co-total{display:flex;justify-content:space-between;align-items:baseline;
  padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--dim)}
.co-total b{font-family:'Space Grotesk',var(--mono);font-size:22px;color:var(--text)}

.auth-notice{font-size:13px;color:#7fe0a8;background:rgba(52,211,153,.08);
  border:1px solid rgba(52,211,153,.3);border-radius:4px;padding:11px 14px;
  margin-bottom:16px;text-align:center;line-height:1.5}

/* "coming soon" footnote inside a plan card */
.plan .soon{font-size:11px;color:var(--dim);line-height:1.55;
  margin:4px 0 22px;padding-top:14px;border-top:1px solid var(--line)}
.plan .soon b{color:var(--text);font-weight:700}

.co-soon{font-size:11.5px;color:var(--dim);line-height:1.55;margin:2px 0 18px;
  padding-top:14px;border-top:1px solid var(--line)}
.co-soon b{color:var(--text);font-weight:700}

/* inline "soon" tag on an upcoming perk */
.soon-tag{display:inline-block;font-size:9px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--blue);border:1px solid rgba(77,124,255,.5);
  border-radius:3px;padding:1px 5px;margin-left:7px;vertical-align:middle;line-height:1.5}