/* ============================================================
   TESSERA — phosphor terminal, instrument panel, hard grid
   ============================================================ */

:root{
  --bg:#080a09;
  --bg-2:#0d100f;
  --panel:#0f1312;
  --fg:#dfe7e3;
  --muted:#63736c;
  --green:#00e5a0;
  --green-dim:#0b8f66;
  --amber:#ffb545;
  --red:#ff5a52;
  --line:rgba(223,231,227,.10);
  --line-2:rgba(223,231,227,.05);
  --pad:clamp(16px,3.4vw,40px);
  --ease:cubic-bezier(.16,1,.3,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--fg);
  font-family:'IBM Plex Sans',system-ui,sans-serif;
  font-size:15.5px;line-height:1.6;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--green);color:var(--bg)}
.muted{color:var(--muted)}

/* ---- background field + CRT ---- */
#field{position:fixed;inset:0;z-index:0;display:block;opacity:.9}
.scan{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.30;
  background:repeating-linear-gradient(to bottom,
    rgba(0,0,0,0) 0px, rgba(0,0,0,0) 2px,
    rgba(0,0,0,.55) 3px, rgba(0,0,0,.55) 4px);
}
.crt{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(ellipse 118% 108% at 50% 48%, transparent 52%, rgba(0,0,0,.88) 100%);
}

/* ---- top bar ---- */
.topbar{
  position:fixed;top:0;left:0;right:0;z-index:20;
  display:flex;justify-content:space-between;align-items:center;
  padding:0 var(--pad);height:44px;
  background:rgba(8,10,9,.90);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.14em;
}
.tb-left,.tb-right{display:flex;align-items:center;gap:16px}
.logo{display:flex;align-items:center;gap:3px;font-weight:600;letter-spacing:.24em;color:var(--fg)}
.logo i{width:7px;height:7px;background:var(--green);display:block}
.logo i:nth-child(2){margin-right:7px;opacity:.45}
.sep{color:var(--muted)}
.stat-dot{display:flex;align-items:center;gap:7px;color:var(--green)}
.stat-dot i{width:5px;height:5px;border-radius:50%;background:var(--green);animation:blip 2s infinite}
@keyframes blip{0%,100%{opacity:1;box-shadow:0 0 8px var(--green)}50%{opacity:.35;box-shadow:none}}
.clock{color:var(--fg);font-variant-numeric:tabular-nums}
.tb-link{color:var(--muted);text-decoration:none;transition:color .3s}
.tb-link:hover{color:var(--green)}
@media(max-width:780px){.tb-left .muted,.stat-dot{display:none}}

/* ---- layout ---- */
main{position:relative;z-index:10}
.hero{
  display:grid;grid-template-columns:1.25fr .85fr;gap:clamp(24px,4vw,60px);
  align-items:center;
  padding:clamp(90px,15vh,150px) var(--pad) clamp(40px,7vh,80px);
  max-width:1440px;margin:0 auto;min-height:100svh;
}
@media(max-width:960px){.hero{grid-template-columns:1fr;min-height:auto;padding-top:100px}}

.kicker{
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.2em;
  color:var(--green);margin-bottom:24px;
}
.hero h1{
  font-family:'IBM Plex Sans',sans-serif;font-weight:300;
  font-size:clamp(2.4rem,5.6vw,4.9rem);line-height:1.02;letter-spacing:-.035em;
}
.hero h1 em{
  font-style:normal;color:var(--green);position:relative;
  text-shadow:0 0 26px rgba(0,229,160,.55);
}
.l{display:block;overflow:hidden}
.l>span{display:block;transform:translateY(104%);animation:up 1.05s var(--ease) forwards}
.l:nth-child(1)>span{animation-delay:.1s}
.l:nth-child(2)>span{animation-delay:.19s}
.l:nth-child(3)>span{animation-delay:.28s}
@keyframes up{to{transform:translateY(0)}}
.sub{margin-top:26px;max-width:48ch;color:var(--muted);font-size:1.02rem;line-height:1.7}
.cta-row{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}

.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em;
  color:var(--bg);background:var(--green);text-decoration:none;
  padding:13px 22px;border:1px solid var(--green);
  transition:all .35s var(--ease);
}
.btn i{font-style:normal;transition:transform .35s var(--ease)}
.btn:hover{box-shadow:0 0 30px rgba(0,229,160,.45)}
.btn:hover i{transform:translateX(4px)}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--green);color:var(--green);box-shadow:none}
.btn.big{padding:16px 34px;font-size:13px;margin-top:30px}

/* ---- hero panel ---- */
.hero-panel{
  background:var(--panel);border:1px solid var(--line);
  box-shadow:0 30px 90px -50px rgba(0,0,0,.9);
}
.panel-head{
  display:flex;justify-content:space-between;align-items:center;
  padding:11px 15px;border-bottom:1px solid var(--line);
  font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.16em;color:var(--muted);
}
.pulse-dot{width:6px;height:6px;border-radius:50%;background:var(--green);animation:blip 1.6s infinite}
#spark{display:block;width:100%;height:150px}
.panel-rows{border-top:1px solid var(--line)}
.vrow{
  display:grid;grid-template-columns:1fr auto auto;gap:14px;align-items:center;
  padding:9px 15px;border-bottom:1px solid var(--line-2);
  font-family:'IBM Plex Mono',monospace;font-size:11.5px;
}
.vrow:last-child{border-bottom:none}
.vrow .vname{color:var(--fg);letter-spacing:.08em}
.vrow .vbar{width:74px;height:4px;background:rgba(223,231,227,.08);position:relative;overflow:hidden}
.vrow .vbar i{position:absolute;left:0;top:0;bottom:0;background:var(--green);transition:width .55s var(--ease)}
.vrow .vms{color:var(--muted);font-variant-numeric:tabular-nums;min-width:52px;text-align:right}
.vrow.warn .vbar i{background:var(--amber)}
.vrow.warn .vms{color:var(--amber)}

/* ---- metric strip ---- */
.strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
@media(max-width:760px){.strip{grid-template-columns:repeat(2,1fr)}}
.strip-item{background:var(--bg-2);padding:26px var(--pad)}
.strip-item b{
  display:block;font-family:'IBM Plex Mono',monospace;font-weight:400;
  font-size:clamp(1.7rem,3.6vw,2.7rem);color:var(--green);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;text-shadow:0 0 22px rgba(0,229,160,.35);
}
.strip-item span{
  display:block;margin-top:8px;font-family:'IBM Plex Mono',monospace;
  font-size:10px;letter-spacing:.2em;color:var(--muted);
}

/* ---- blocks ---- */
.block{padding:clamp(70px,11vh,130px) var(--pad);max-width:1440px;margin:0 auto}
.block-head{margin-bottom:46px}
.block-head h2{
  font-weight:300;font-size:clamp(1.8rem,4vw,3.2rem);
  letter-spacing:-.035em;line-height:1.06;
}

/* ---- terminal ---- */
.term{border:1px solid var(--line);background:#060807;box-shadow:0 40px 100px -60px #000}
.term-bar{
  display:flex;align-items:center;gap:14px;padding:10px 14px;
  border-bottom:1px solid var(--line);background:var(--panel);
}
.dots{display:flex;gap:6px}
.dots i{width:9px;height:9px;border-radius:50%;background:rgba(223,231,227,.16);display:block}
.dots i:first-child{background:var(--red);opacity:.7}
.dots i:nth-child(2){background:var(--amber);opacity:.7}
.dots i:last-child{background:var(--green);opacity:.7}
.term-title{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted);letter-spacing:.06em}
.term-body{
  font-family:'IBM Plex Mono',monospace;font-size:12.5px;line-height:1.85;
  padding:20px 20px 26px;color:var(--fg);white-space:pre-wrap;
  min-height:330px;overflow-x:auto;
}
.term-body .g{color:var(--green)}
.term-body .m{color:var(--muted)}
.term-body .a{color:var(--amber)}
.term-body .r{color:var(--red)}
.caret{
  display:inline-block;width:7px;height:14px;background:var(--green);
  vertical-align:-2px;animation:cb 1s steps(2) infinite;
}
@keyframes cb{0%,50%{opacity:1}51%,100%{opacity:0}}

/* ---- grid of cells ---- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}
@media(max-width:900px){.grid3{grid-template-columns:1fr}}
.cell{background:var(--bg-2);padding:34px 28px 30px;position:relative;transition:background .45s var(--ease)}
.cell:hover{background:var(--panel)}
.cell-n{
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.2em;
  color:var(--green);display:block;margin-bottom:20px;
}
.cell h3{font-weight:500;font-size:1.24rem;margin-bottom:11px;letter-spacing:-.01em}
.cell p{color:var(--muted);font-size:.95rem;line-height:1.68;margin-bottom:20px}
.cell ul{list-style:none;border-top:1px solid var(--line-2);padding-top:14px}
.cell li{
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.09em;
  color:var(--muted);padding:5px 0 5px 15px;position:relative;
}
.cell li::before{content:'▸';position:absolute;left:0;color:var(--green-dim)}

/* ---- quote ---- */
.quote-block{
  padding:clamp(70px,12vh,140px) var(--pad);text-align:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-2);
}
.quote-block p{
  font-weight:300;font-size:clamp(1.3rem,3.2vw,2.4rem);line-height:1.3;
  letter-spacing:-.025em;max-width:22ch;margin:0 auto;
}
.quote-block span{
  display:block;margin-top:26px;font-family:'IBM Plex Mono',monospace;
  font-size:10.5px;letter-spacing:.22em;color:var(--muted);
}

/* ---- closer ---- */
.closer{padding:clamp(80px,14vh,160px) var(--pad);text-align:center}
.closer h2{
  font-weight:300;font-size:clamp(2.2rem,6.5vw,5.2rem);
  letter-spacing:-.04em;line-height:1;
}
.closer p{margin-top:18px;color:var(--muted)}

/* ---- footer ---- */
footer{
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding:22px var(--pad);border-top:1px solid var(--line);
  position:relative;z-index:10;background:var(--bg);
  font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.16em;color:var(--muted);
}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--green)}

/* ---- reveals ---- */
[data-r]{opacity:0;transform:translateY(18px);transition:opacity .85s var(--ease),transform .85s var(--ease)}
[data-r].in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .l>span{transform:none}[data-r]{opacity:1;transform:none}
  .scan{display:none}
}

/* ---- guide ---- */
.guide{position:relative;z-index:10;max-width:800px;margin:0 auto;padding:100px var(--pad) 90px}
.guide h1{font-weight:300;font-size:clamp(2.2rem,6vw,3.9rem);letter-spacing:-.04em;line-height:1.02;margin-bottom:18px}
.guide .sub{color:var(--muted);font-size:1.05rem;margin-bottom:48px;max-width:60ch}
.guide h2{font-weight:500;font-size:1.35rem;margin:44px 0 13px;letter-spacing:-.015em}
.guide p{color:var(--muted);margin-bottom:14px;line-height:1.75}
.guide li{color:var(--muted);margin:0 0 9px 20px;line-height:1.7}
.guide code{font-family:'IBM Plex Mono',monospace;background:rgba(0,229,160,.10);color:var(--green);padding:2px 6px;font-size:.87em}
.guide pre{background:#060807;border:1px solid var(--line);border-left:2px solid var(--green);padding:18px 20px;overflow-x:auto;margin:16px 0 24px}
.guide pre code{background:none;color:var(--fg);padding:0;font-size:12px;line-height:1.75}
.guide .back{display:inline-block;margin-bottom:38px;font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.18em;color:var(--green);text-decoration:none}

/* ---- hero readout strip ---- */
.hero-readout{
  grid-column:1 / -1;margin-top:clamp(30px,6vh,64px);
  display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);
}
.hero-readout span{
  background:var(--bg-2);padding:12px 14px;
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.1em;
  color:var(--fg);display:flex;flex-direction:column;gap:6px;overflow:hidden;white-space:nowrap;
}
.hero-readout i{font-style:normal;font-size:9.5px;letter-spacing:.2em;color:var(--muted)}
.hero-readout b{font-weight:400;color:var(--green)}
@media(max-width:960px){.hero-readout{grid-template-columns:repeat(2,1fr)}.ro-scroll{display:none}}

/* ---- depth book ---- */
.book{border:1px solid var(--line);background:#060807;box-shadow:0 40px 100px -60px #000}
.book-head,.book-foot{
  display:flex;justify-content:space-between;align-items:center;padding:12px 16px;
  font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.14em;color:var(--muted);
}
.book-head{border-bottom:1px solid var(--line)}
.book-foot{border-top:1px solid var(--line)}
.book-spread b,.book-foot b{color:var(--fg);font-weight:400;font-variant-numeric:tabular-nums}
.book-foot .bid b{color:var(--green)}
.book-foot .ask b{color:var(--red)}
.book-foot .mid{
  color:var(--fg);font-size:14px;letter-spacing:.06em;font-variant-numeric:tabular-nums;
  text-shadow:0 0 18px rgba(0,229,160,.35);
}
#depth{display:block;width:100%;height:300px}
@media(max-width:600px){#depth{height:220px}}