/* ============================================================
   SHOWDOWN LAB — Deep Intelligence theme
   Violet + cyan signal on near-black blue. Command-center premium.
   ============================================================ */

:root {
  /* base surfaces */
  --bg:        #060610;
  --bg-2:      #080814;
  --surface:   #0E0E1C;
  --surface-2: #13132610;
  --elev:      #15152A;
  --elev-2:    #1B1B33;

  /* lines */
  --line:        rgba(255,255,255,.07);
  --line-2:      rgba(255,255,255,.12);
  --line-strong: #25253A;

  /* text */
  --text:    #F8FAFC;
  --text-2:  #A1A1AA;
  --text-3:  #6B6B80;
  --text-4:  #4A4A5C;

  /* signal */
  --violet:    #8B5CF6;
  --violet-2:  #A78BFA;
  --cyan:      #22D3EE;
  --cyan-2:    #06B6D4;
  --green:     #34D399;
  --amber:     #FBBF24;

  --accent:        var(--violet);
  --accent-2:      var(--cyan);
  --grad: linear-gradient(105deg, var(--violet) 0%, var(--cyan) 100%);
  --grad-soft: linear-gradient(105deg, rgba(139,92,246,.18), rgba(34,211,238,.14));

  /* glows */
  --glow-violet: 0 0 0 1px rgba(139,92,246,.35), 0 0 40px -8px rgba(139,92,246,.55);
  --glow-cyan:   0 0 0 1px rgba(34,211,238,.30), 0 0 36px -10px rgba(34,211,238,.45);

  /* type */
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Hanken Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* layout */
  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 16px;
  --radius-lg: 22px;
  --radius-sm: 10px;

  --nav-h: 72px;

  /* density knob for background fields (set by tweaks) */
  --bg-density: 1;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

/* ambient page wash */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(70% 50% at 12% -8%, rgba(139,92,246,.16), transparent 60%),
    radial-gradient(60% 45% at 100% 8%, rgba(34,211,238,.12), transparent 55%),
    radial-gradient(80% 60% at 50% 120%, rgba(99,102,241,.10), transparent 60%);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(139,92,246,.35); color: #fff; }

/* scrollbar */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #1e1e36; border-radius: 20px; border: 3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: #2a2a48; }

/* ----------------------------------------------------------- typography */
h1,h2,h3,h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.04; margin: 0; letter-spacing: -.02em; color: var(--text); overflow-wrap: break-word; }
p { margin: 0; }

.h-display {
  font-size: clamp(2.6rem, 6.4vw, 5.4rem);
  font-weight: 500;
  letter-spacing: -.035em;
  line-height: .98;
}
.h1 { font-size: clamp(2.1rem, 4.6vw, 3.7rem); letter-spacing: -.03em; }
.h2 { font-size: clamp(1.7rem, 3.2vw, 2.7rem); letter-spacing: -.025em; }
.h3 { font-size: clamp(1.25rem, 2vw, 1.55rem); }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.italic-accent { font-style: italic; font-family: var(--font-display); font-weight: 400; }

.lead { font-size: clamp(1.05rem, 1.5vw, 1.3rem); color: var(--text-2); line-height: 1.55; font-weight: 380; }
.muted { color: var(--text-2); }
.dim { color: var(--text-3); }
.balance { text-wrap: balance; }
.pretty { text-wrap: pretty; }

/* mono label / kicker */
.kicker {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 500;
  display: inline-flex; align-items: center; gap: .6em;
}
.kicker .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 10px var(--accent-2); }

.tag {
  font-family: var(--font-mono);
  font-size: .66rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--text-2);
  padding: .34em .7em; border-radius: 6px;
  border: 1px solid var(--line-2);
  background: rgba(255,255,255,.02);
  white-space: nowrap;
}
.tag.violet { color: var(--violet-2); border-color: rgba(139,92,246,.4); background: rgba(139,92,246,.08); }
.tag.cyan   { color: var(--cyan);    border-color: rgba(34,211,238,.4);  background: rgba(34,211,238,.08); }
.tag.green  { color: var(--green);   border-color: rgba(52,211,153,.4);  background: rgba(52,211,153,.08); }

/* ----------------------------------------------------------- layout */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); position: relative; z-index: 1; }
.section { padding-block: clamp(72px, 11vw, 148px); position: relative; z-index: 1; }
.section.tight { padding-block: clamp(48px, 7vw, 90px); }
.sec-head { max-width: 760px; margin-bottom: clamp(36px, 5vw, 64px); }
.sec-head .kicker { margin-bottom: 20px; }
.sec-head h2 { margin-bottom: 18px; }

.hr { height: 1px; background: var(--line); border: 0; margin: 0; }
.divider-glow { height: 1px; background: linear-gradient(90deg, transparent, var(--line-strong) 20%, var(--line-strong) 80%, transparent); border: 0; }

.grid { display: grid; gap: 18px; }
.cols-2 { grid-template-columns: repeat(2,1fr); }
.cols-3 { grid-template-columns: repeat(3,1fr); }
.cols-4 { grid-template-columns: repeat(4,1fr); }
@media (max-width: 940px){ .cols-3,.cols-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .cols-2,.cols-3,.cols-4 { grid-template-columns: 1fr; } }

/* ----------------------------------------------------------- buttons */
.btn {
  --b: 0;
  font-family: var(--font-body);
  font-weight: 560;
  font-size: .96rem;
  letter-spacing: -.01em;
  display: inline-flex; align-items: center; gap: .55em;
  padding: .82em 1.35em;
  border-radius: 11px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .3s, background .3s, border-color .3s, color .3s;
  white-space: nowrap;
  position: relative;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn .arr { transition: transform .3s cubic-bezier(.2,.8,.2,1); }
.btn:hover .arr { transform: translateX(4px); }

.btn-primary {
  background: var(--grad);
  color: #0a0118;
  font-weight: 640;
  box-shadow: 0 8px 30px -10px rgba(139,92,246,.7), inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -10px rgba(139,92,246,.85), inset 0 1px 0 rgba(255,255,255,.4); }

.btn-ghost {
  background: rgba(255,255,255,.025);
  color: var(--text);
  border-color: var(--line-2);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { border-color: rgba(139,92,246,.5); background: rgba(139,92,246,.08); transform: translateY(-2px); }

.btn-sm { padding: .6em 1em; font-size: .85rem; border-radius: 9px; }
.btn-lg { padding: .95em 1.7em; font-size: 1.02rem; }

.link-arrow {
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .04em;
  color: var(--text); display: inline-flex; align-items: center; gap: .5em;
  border-bottom: 1px solid var(--line-2); padding-bottom: 3px;
  transition: color .25s, border-color .25s, gap .25s;
}
.link-arrow:hover { color: var(--cyan); border-color: var(--cyan); gap: .8em; }

/* ----------------------------------------------------------- cards */
.card {
  position: relative;
  background:
    linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,0) 40%),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform .4s cubic-bezier(.2,.8,.2,1), border-color .4s, box-shadow .4s, background .4s;
  overflow: hidden;
}
.card::after {
  /* hover glow following nothing — just a soft top sheen on hover */
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  box-shadow: inset 0 0 0 1px transparent; pointer-events: none;
  transition: box-shadow .4s, opacity .4s; opacity: 0;
  background: radial-gradient(120% 80% at 50% -10%, rgba(139,92,246,.14), transparent 60%);
}
.card:hover { transform: translateY(-4px); border-color: var(--line-2); }
.card:hover::after { opacity: 1; }
.card.glow:hover { box-shadow: 0 24px 60px -28px rgba(139,92,246,.7); border-color: rgba(139,92,246,.4); }

.card-num {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .2em;
  color: var(--text-3);
}

/* feature icon chip */
.chip {
  width: 48px; height: 48px; border-radius: 13px;
  display: grid; place-items: center;
  background: var(--grad-soft);
  border: 1px solid var(--line-2);
  color: var(--violet-2);
  margin-bottom: 22px;
}
.chip svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 1.6; }

/* stat */
.stat-num { font-family: var(--font-display); font-size: clamp(2.2rem,4vw,3.2rem); font-weight: 500; letter-spacing: -.03em; line-height: 1; }
.stat-lbl { color: var(--text-3); font-size: .9rem; margin-top: 10px; }

/* ----------------------------------------------------------- nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background .4s, border-color .4s, backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(8,8,18,.72);
  backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--line);
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; }
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 600; font-size: 1.06rem; letter-spacing: -.02em; }
.brand .mark { width: 30px; height: 30px; flex: none; }
.brand b { font-weight: 600; }
.brand .lab { color: var(--text-3); font-weight: 500; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  font-size: .92rem; color: var(--text-2); padding: 8px 14px; border-radius: 9px;
  transition: color .2s, background .2s; font-weight: 480;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.04); }
.nav-links a.active { color: var(--text); }
.nav-links a.active::after { content:""; display:block; height:2px; margin-top:4px; border-radius:2px; background: var(--grad); }

.nav-right { display: flex; align-items: center; gap: 12px; }

.lang-toggle {
  display: inline-flex; align-items: center;
  border: 1px solid var(--line-2); border-radius: 9px; overflow: hidden;
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .06em;
}
.lang-toggle button {
  background: none; border: 0; color: var(--text-3); cursor: pointer;
  padding: 7px 11px; font-family: inherit; font-size: inherit; letter-spacing: inherit;
  transition: color .2s, background .2s;
}
.lang-toggle button.on { color: var(--text); background: rgba(139,92,246,.16); }

.nav-burger { display: none; background: none; border: 1px solid var(--line-2); border-radius: 9px; width: 40px; height: 40px; cursor: pointer; color: var(--text); }
.nav-burger svg { width: 20px; height: 20px; margin: auto; stroke: currentColor; }

@media (max-width: 880px) {
  .nav-links, .nav-right .desktop-cta { display: none; }
  .nav-burger { display: flex; }
}

/* mobile sheet */
.m-sheet {
  position: fixed; inset: 0; z-index: 99; background: rgba(6,6,16,.96); backdrop-filter: blur(12px);
  display: flex; flex-direction: column; padding: calc(var(--nav-h) + 20px) var(--gutter) 40px;
  gap: 6px; transform: translateY(-100%); transition: transform .45s cubic-bezier(.2,.8,.2,1); pointer-events: none;
}
.m-sheet.open { transform: translateY(0); pointer-events: auto; }
.m-sheet a { font-family: var(--font-display); font-size: 1.8rem; padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--text); }
.m-sheet .m-cta { margin-top: 24px; }

/* ----------------------------------------------------------- footer */
.footer { position: relative; z-index: 1; border-top: 1px solid var(--line); padding-top: 72px; padding-bottom: 40px; background: linear-gradient(180deg, transparent, rgba(139,92,246,.04)); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
@media (max-width: 820px){ .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 480px){ .footer-grid { grid-template-columns: 1fr; } }
.footer h5 { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .2em; text-transform: uppercase; color: var(--text-3); margin: 0 0 16px; font-weight: 500; }
.footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer ul a { color: var(--text-2); font-size: .92rem; transition: color .2s; }
.footer ul a:hover { color: var(--cyan); }
.footer-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .82rem; color: var(--text-3); font-family: var(--font-mono); letter-spacing: .02em; }
.status-pill { display: inline-flex; align-items: center; gap: 8px; }
.status-pill .led { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%,100%{ opacity:1 } 50%{ opacity:.4 } }

/* ----------------------------------------------------------- hero canvas */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; padding-top: var(--nav-h); overflow: hidden; }
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; display: block; }
canvas.mini-field { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero-veil { position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(90% 70% at 50% 40%, transparent 30%, rgba(6,6,16,.55) 75%, var(--bg) 100%); }
.hero .wrap { z-index: 2; }

/* ----------------------------------------------------------- marquee */
.marquee { overflow: hidden; border-block: 1px solid var(--line); padding: 0; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: flex; gap: 56px; width: max-content; animation: scrollx 36s linear infinite; padding-block: 18px; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { font-family: var(--font-mono); font-size: .82rem; letter-spacing: .14em; text-transform: uppercase; color: var(--text-3); display: inline-flex; align-items: center; gap: 56px; }
.marquee-item::after { content: "◆"; color: var(--violet); font-size: .6rem; }
@keyframes scrollx { to { transform: translateX(-50%); } }

/* ----------------------------------------------------------- reveal */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"]{ transition-delay: .07s; }
.reveal[data-d="2"]{ transition-delay: .14s; }
.reveal[data-d="3"]{ transition-delay: .21s; }
.reveal[data-d="4"]{ transition-delay: .28s; }
.reveal[data-d="5"]{ transition-delay: .35s; }
html.reveal-off .reveal { opacity: 1 !important; transform: none !important; transition: none !important; animation: none !important; }
@media (prefers-reduced-motion: reduce){ .reveal { opacity: 1; transform: none; transition: none; } }

/* ----------------------------------------------------------- misc */
.eyebrow-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.pill {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 14px 7px 11px; border-radius: 100px;
  border: 1px solid var(--line-2); background: rgba(255,255,255,.025);
  font-size: .82rem; color: var(--text-2); font-weight: 480;
  backdrop-filter: blur(8px);
}
.pill .led { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px var(--green); }

.node-line { stroke: var(--line-strong); }

/* schematic / blueprint background grid */
.blueprint { position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: calc(.5 * var(--bg-density));
  background-image:
    linear-gradient(rgba(139,92,246,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139,92,246,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(80% 70% at 50% 30%, #000, transparent 80%);
  mask-image: radial-gradient(80% 70% at 50% 30%, #000, transparent 80%);
}

/* corner ticks for "interface" framing */
.framed { position: relative; }
.framed::before, .framed::after { content:""; position:absolute; width:14px; height:14px; border:1px solid var(--line-2); pointer-events:none; }
.framed::before { top:-1px; left:-1px; border-right:0; border-bottom:0; }
.framed::after  { bottom:-1px; right:-1px; border-left:0; border-top:0; }

/* tweaks panel */
.tw-panel {
  position: fixed; right: 18px; bottom: 18px; z-index: 1000; width: 280px;
  background: rgba(14,14,28,.94); backdrop-filter: blur(20px);
  border: 1px solid var(--line-2); border-radius: 16px; padding: 16px;
  box-shadow: 0 30px 80px -30px rgba(0,0,0,.9), var(--glow-violet);
  font-family: var(--font-body); transform: translateY(20px) scale(.97); opacity: 0; pointer-events: none;
  transition: opacity .3s, transform .3s;
}
.tw-panel.show { opacity: 1; transform: none; pointer-events: auto; }
.tw-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.tw-head .t { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--text-2); }
.tw-head button { background: none; border: 0; color: var(--text-3); cursor: pointer; font-size: 1.2rem; line-height: 1; padding: 0 4px; }
.tw-head button:hover { color: var(--text); }
.tw-group { margin-bottom: 16px; }
.tw-group:last-child { margin-bottom: 0; }
.tw-label { font-size: .78rem; color: var(--text-3); margin-bottom: 8px; display: block; }
.tw-seg { display: flex; gap: 4px; background: rgba(255,255,255,.04); border: 1px solid var(--line); border-radius: 10px; padding: 4px; }
.tw-seg button { flex: 1; background: none; border: 0; color: var(--text-3); cursor: pointer; padding: 7px 4px; border-radius: 7px; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .04em; text-transform: uppercase; transition: background .2s, color .2s; }
.tw-seg button.on { background: var(--grad); color: #0a0118; font-weight: 600; }
.tw-range { width: 100%; accent-color: var(--violet); }

/* ----------------------------------------------------------- mobile-first polish */
@media (max-width: 560px) {
  /* tighter vertical rhythm so mobile isn't endless scrolling */
  .section { padding-block: clamp(46px, 13vw, 72px); }
  /* comfortable hero/lead sizing on the smallest phones */
  .lead { font-size: 1.02rem; }
  .h-display { letter-spacing: -.03em; }
}
/* in-page anchor targets clear the fixed nav */
[id] { scroll-margin-top: calc(var(--nav-h) + 16px); }