/* gotyourbackjack.com landing. Same visual language as the Security Wall
   (web/src/wall/wall.css): dark control room, arc cyan, Chakra Petch for
   display, IBM Plex for text. Light mode is the daylight version; the "screens"
   (Jack's log, terminals) stay dark in both, like a monitor on a desk.
   No inline styles or scripts anywhere: Caddy sends a strict CSP. */

@font-face { font-family: "Chakra Petch"; font-weight: 500; font-display: swap; src: url(fonts/chakra-petch-latin-500-normal.woff2) format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 600; font-display: swap; src: url(fonts/chakra-petch-latin-600-normal.woff2) format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 700; font-display: swap; src: url(fonts/chakra-petch-latin-700-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-display: swap; src: url(fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-display: swap; src: url(fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-display: swap; src: url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-display: swap; src: url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2"); }

:root {
  --display: "Chakra Petch", "Segoe UI", system-ui, sans-serif;
  --body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --max: 1180px;
  --gut: clamp(16px, 4vw, 40px);

  /* daylight */
  --ground: #f2f0eb;
  --ground-2: #e9e6df;
  --panel: #fbfaf7;
  --line: rgba(14, 40, 56, .13);
  --line-2: rgba(10, 125, 150, .35);
  --ink: #0e1820;
  --ink-2: #3c4f5e;
  --ink-3: #6a7c89;
  --arc: #0a7d96;
  --arc-ink: #ffffff;
  --glow: rgba(10, 125, 150, .10);
  --dot: rgba(14, 40, 56, .10);
  --ok: #2f7d4f; --warn: #a8670f; --crit: #c0392b;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #03070c;
    --ground-2: #060d15;
    --panel: rgba(9, 18, 28, .72);
    --line: rgba(79, 216, 240, .14);
    --line-2: rgba(79, 216, 240, .3);
    --ink: #dcedf7;
    --ink-2: #8ba7bb;
    --ink-3: #567287;
    --arc: #4fd8f0;
    --arc-ink: #03070c;
    --glow: rgba(79, 216, 240, .13);
    --dot: rgba(79, 216, 240, .09);
    --ok: #4fe3a0; --warn: #f4b544; --crit: #ff5d6c;
    color-scheme: dark;
  }
}

/* A screen is always dark, whatever the page theme. */
.screen, .log, .term {
  --s-ground: #050b12; --s-panel: #08121c; --s-line: rgba(79, 216, 240, .16);
  --s-ink: #dcedf7; --s-ink-2: #8ba7bb; --s-ink-3: #567287; --s-arc: #4fd8f0;
  --s-ok: #4fe3a0; --s-warn: #f4b544; --s-crit: #ff5d6c; --s-info: #7aa7ff;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; color: var(--ink); background: var(--ground);
  font: 400 17px/1.6 var(--body);
  background-image:
    radial-gradient(1100px 700px at 78% -8%, var(--glow), transparent 65%),
    radial-gradient(var(--dot) 1px, transparent 1.2px);
  background-size: auto, 24px 24px;
  overflow-x: hidden;
  overflow-x: clip;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--arc); text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--arc); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--arc); color: var(--arc-ink); }

.skip { position: absolute; left: -999px; top: 8px; background: var(--arc); color: var(--arc-ink); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* ---------------------------------------------------------------- header */
.top {
  max-width: var(--max); margin: 0 auto; padding: 22px var(--gut);
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.mark { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; margin-right: auto; }
.mark svg { width: 30px; height: 30px; fill: none; }
.mark .ring { stroke: var(--line-2); stroke-width: 2; }
.mark .arc { stroke: var(--arc); stroke-width: 2.6; stroke-linecap: round; }
.mark .eye { fill: var(--arc); }
.mark span { font: 600 17px/1 var(--display); letter-spacing: .14em; text-transform: uppercase; }
.mark b, .foot b { color: var(--arc); font-weight: inherit; }
.top nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.top nav a { font: 600 12px/1 var(--display); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-2); text-decoration: none; padding: 9px 12px; border-radius: 999px; }
.top nav a:hover { color: var(--arc); }
.top nav .nav-cta { border: 1px solid var(--line-2); color: var(--arc); }
.top nav .nav-cta:hover { background: var(--arc); color: var(--arc-ink); }
@media (max-width: 720px) { .top nav a:not(.nav-cta) { display: none; } }

/* ---------------------------------------------------------------- shared */
main { max-width: var(--max); margin: 0 auto; padding: 0 var(--gut); }
section { padding: clamp(56px, 9vw, 112px) 0 0; }
.sec { display: flex; align-items: baseline; gap: 16px; margin: 0 0 28px; font: 700 clamp(28px, 4vw, 44px)/1.05 var(--display); letter-spacing: .01em; }
.sec span { font: 500 13px/1 var(--mono); color: var(--arc); letter-spacing: .1em; padding: 6px 8px; border: 1px solid var(--line-2); border-radius: 4px; transform: translateY(-6px); }
.intro { color: var(--ink-2); max-width: 62ch; margin: 0 0 18px; }
.fine { color: var(--ink-3); font: 400 12.5px/1.5 var(--mono); margin: 14px 0 0; }
.w-lbl { font: 600 11px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--s-arc); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 600 13px/1 var(--display); letter-spacing: .16em; text-transform: uppercase;
  padding: 15px 22px; border-radius: 6px; border: 1px solid var(--arc);
  background: var(--arc); color: var(--arc-ink); text-decoration: none; cursor: pointer;
  box-shadow: 0 0 0 0 var(--glow); transition: box-shadow .2s, transform .2s, background .2s, color .2s;
}
.btn:hover { box-shadow: 0 0 28px 2px var(--glow), 0 0 0 4px var(--glow); transform: translateY(-1px); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn.ghost:hover { color: var(--arc); border-color: var(--arc); }
.btn[disabled] { opacity: .6; cursor: progress; transform: none; }

/* glass panel with the wall's corner bracket */
.glass, .log, .term, .form {
  position: relative; border: 1px solid var(--line); border-radius: 10px;
}
.log::before, .term::before, .form::before {
  content: ""; position: absolute; top: -1px; left: -1px; width: 16px; height: 16px;
  border-top: 2px solid var(--arc); border-left: 2px solid var(--arc); border-radius: 10px 0 0 0; opacity: .8;
}

/* ---------------------------------------------------------------- hero */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(28px, 5vw, 64px);
  align-items: center; padding-top: clamp(28px, 6vw, 72px); position: relative;
}
.hero::before {
  /* the wall's core orbit, faint, behind the log */
  content: ""; position: absolute; z-index: -1; right: -12%; top: 50%; width: min(760px, 90vw); aspect-ratio: 1;
  transform: translateY(-50%); border-radius: 50%;
  background:
    radial-gradient(circle, transparent 47%, var(--line) 47.3%, transparent 47.6%),
    radial-gradient(circle, transparent 34%, var(--line) 34.3%, transparent 34.6%),
    radial-gradient(circle, transparent 21%, var(--line) 21.3%, transparent 21.6%),
    radial-gradient(circle, var(--glow), transparent 60%);
  pointer-events: none;
}
.kicker { display: inline-flex; align-items: center; gap: 10px; font: 500 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px 8px 12px; margin: 0 0 26px; background: var(--panel); }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 0 var(--ok); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent); } 70%, 100% { box-shadow: 0 0 0 9px transparent; } }
h1 { margin: 0 0 24px; font: 700 clamp(46px, 7.2vw, 96px)/.94 var(--display); letter-spacing: -.01em; }
h1 em { font-style: normal; color: var(--arc); text-shadow: 0 0 44px var(--glow); }
.lede { font-size: clamp(17px, 1.5vw, 19px); color: var(--ink-2); max-width: 54ch; margin: 0 0 32px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* Jack's log */
.log {
  margin: 0; background: linear-gradient(180deg, var(--s-panel), var(--s-ground)); color: var(--s-ink); border-color: var(--s-line);
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .55), 0 0 0 1px rgba(0, 0, 0, .2);
  padding: 18px 18px 20px; font: 400 13.5px/1.55 var(--mono);
}
.log figcaption { display: flex; justify-content: space-between; align-items: center; padding-bottom: 14px; margin-bottom: 12px; border-bottom: 1px solid var(--s-line); }
.log .dim { color: var(--s-ink-3); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.log ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.log li { display: grid; grid-template-columns: 44px 46px minmax(0, 1fr); gap: 10px; align-items: baseline; opacity: 0; animation: line .45s ease-out forwards; }
.log li:nth-child(1) { animation-delay: .25s; } .log li:nth-child(2) { animation-delay: .7s; }
.log li:nth-child(3) { animation-delay: 1.15s; } .log li:nth-child(4) { animation-delay: 1.6s; }
.log li:nth-child(5) { animation-delay: 2.15s; } .log li:nth-child(6) { animation-delay: 2.9s; }
@keyframes line { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.log time { color: var(--s-ink-3); }
.log b { font-weight: 500; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.log span { color: var(--s-ink-2); }
.t-info { color: var(--s-info); } .t-ok { color: var(--s-ok); } .t-crit { color: var(--s-crit); } .t-arc { color: var(--s-arc); }
.log li:nth-child(5) span { color: var(--s-ink); }
.log .say { margin-top: 6px; padding-top: 12px; border-top: 1px dashed var(--s-line); }
.log .say span { color: var(--s-ink); font-family: var(--body); font-size: 15px; }
.caret { display: inline-block; width: 8px; height: 1.05em; margin-left: 4px; vertical-align: -2px; background: var(--s-arc); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .log li { opacity: 1; animation: none; }
  .caret, .pulse { animation: none; }
}

/* ---------------------------------------------------------------- what Jack does */
.four { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); counter-reset: d; }
.four li { padding: 26px 24px 8px 0; counter-increment: d; position: relative; }
.four li + li { padding-left: 24px; border-left: 1px solid var(--line); }
.four li::before { content: counter(d, decimal-leading-zero); display: block; font: 700 40px/1 var(--display); color: transparent; -webkit-text-stroke: 1.2px var(--arc); opacity: .55; margin-bottom: 18px; }
.four li:last-child::before { opacity: 1; -webkit-text-stroke: 0; color: var(--arc); text-shadow: 0 0 26px var(--glow); }
.four h3 { margin: 0 0 10px; font: 600 20px/1.2 var(--display); letter-spacing: .02em; }
.four p { margin: 0; color: var(--ink-2); font-size: 15.5px; }

/* ---------------------------------------------------------------- walls */
.shot { margin: 0; }
.frame {
  border-radius: 12px; overflow: hidden; border: 1px solid var(--line-2); background: #03070c;
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, .6), 0 0 0 6px var(--ground-2), 0 0 0 7px var(--line);
}
.frame.light { background: #f6f5f2; }
.shot figcaption { margin-top: 18px; color: var(--ink-2); font-size: 15px; }
.shot figcaption b { display: inline-block; margin-right: 10px; font: 600 12px/1 var(--display); letter-spacing: .18em; text-transform: uppercase; color: var(--arc); }
.wide { margin: 34px 0 44px; }
.pair .frame { aspect-ratio: 16 / 10; }
.pair .frame img { width: 100%; height: 100%; object-fit: cover; object-position: top left; }
.pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(20px, 3vw, 36px); align-items: start; }

/* ---------------------------------------------------------------- how */
.how-grid, .agents-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
.steps { list-style: none; margin: 0; padding: 0; counter-reset: s; display: grid; gap: 22px; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 42px minmax(0, 1fr); column-gap: 14px; color: var(--ink-2); }
.steps li::before { content: counter(s); grid-row: span 2; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-2); color: var(--arc); font: 600 15px/1 var(--display); }
.steps b { color: var(--ink); font-weight: 600; display: block; }

.term {
  background: var(--s-ground); color: var(--s-ink); border-color: var(--s-line);
  font: 400 13.5px/1.6 var(--mono); padding: 22px; box-shadow: 0 30px 80px -34px rgba(0, 0, 0, .55);
}
.term p { margin: 0 0 12px; }
.cmd { color: var(--s-ink); overflow-wrap: anywhere; padding-bottom: 18px; border-bottom: 1px solid var(--s-line); }
.ps { color: var(--s-arc); margin-right: 8px; user-select: none; }
.wire { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 12px; margin: 26px 0 22px; }
.node { font: 600 12px/1 var(--display); letter-spacing: .14em; text-transform: uppercase; padding: 10px 12px; border: 1px solid var(--s-line); border-radius: 6px; color: var(--s-ink-2); white-space: nowrap; }
.node.jack { color: var(--s-ground); background: var(--s-arc); border-color: var(--s-arc); box-shadow: 0 0 22px rgba(79, 216, 240, .35); }
.line { position: relative; height: 34px; display: grid; align-items: end; justify-items: center; }
.line i { position: absolute; left: 0; right: 0; top: 50%; height: 2px; background: repeating-linear-gradient(90deg, var(--s-arc) 0 8px, transparent 8px 14px); background-size: 28px 2px; animation: flow 1.2s linear infinite; opacity: .8; }
.line i::after { content: ""; position: absolute; right: -2px; top: -4px; border: 5px solid transparent; border-left: 7px solid var(--s-arc); border-right: 0; }
.line em { font-style: normal; font-size: 11px; color: var(--s-ink-3); letter-spacing: .06em; transform: translateY(16px); white-space: nowrap; }
@keyframes flow { to { background-position: 28px 0; } }
@media (prefers-reduced-motion: reduce) { .line i { animation: none; } }
.facts { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.facts li { font-size: 12px; color: var(--s-ok); border: 1px solid color-mix(in srgb, var(--s-ok) 35%, transparent); background: color-mix(in srgb, var(--s-ok) 7%, transparent); padding: 5px 9px; border-radius: 4px; }
.facts li::before { content: "✓ "; }

/* ---------------------------------------------------------------- agents */
.chat p { color: var(--s-ink-2); }
.chat .you { color: var(--s-ink); font-size: 14.5px; }
.chat .tool { color: var(--s-arc); font-size: 12px; letter-spacing: .04em; margin-bottom: 6px; }
.chat .tool::before { content: "⏺ "; color: var(--s-ok); }
.chat .tool span { color: var(--s-ink-3); margin-left: 6px; }
.chat p:last-child { margin: 0; color: var(--s-ink); }

/* ---------------------------------------------------------------- join */
.join { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; padding-bottom: clamp(64px, 9vw, 120px); }
.big { font: 700 clamp(30px, 4vw, 46px)/1.05 var(--display); margin: 0 0 18px; color: var(--arc); }
.form { background: var(--panel); padding: clamp(20px, 3vw, 30px); display: grid; gap: 8px; box-shadow: 0 30px 80px -40px rgba(0, 0, 0, .35); }
.form label { font: 600 12px/1 var(--display); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-2); margin-top: 10px; }
.form label:first-child { margin-top: 0; }
.opt { color: var(--ink-3); letter-spacing: .08em; font-weight: 500; margin-left: 6px; }
.form input, .form textarea {
  font: 400 16px/1.4 var(--body); color: var(--ink); background: var(--ground); border: 1px solid var(--line);
  border-radius: 6px; padding: 13px 14px; width: 100%; transition: border-color .15s, box-shadow .15s;
}
.form textarea { resize: vertical; min-height: 90px; }
.form input::placeholder, .form textarea::placeholder { color: var(--ink-3); }
.form input:focus, .form textarea:focus { outline: none; border-color: var(--arc); box-shadow: 0 0 0 4px var(--glow); }
.form input[aria-invalid="true"] { border-color: var(--crit); }
.form .btn { margin-top: 16px; width: 100%; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.status { margin: 6px 0 0; min-height: 1.4em; font-size: 15px; }
.status.ok { color: var(--ok); }
.status.err { color: var(--crit); }
.privacy { margin: 6px 0 0; color: var(--ink-3); font-size: 13px; line-height: 1.5; }
.form.done .btn, .form.done input, .form.done textarea, .form.done label { display: none; }
.form.done .status { font: 600 22px/1.3 var(--display); }

/* ---------------------------------------------------------------- footer */
.foot {
  max-width: var(--max); margin: 0 auto; padding: 26px var(--gut) 40px; border-top: 1px solid var(--line);
  display: flex; gap: 10px 24px; align-items: center; flex-wrap: wrap; color: var(--ink-3); font-size: 14px;
}
.foot > span:first-child { font: 600 14px/1 var(--display); letter-spacing: .14em; text-transform: uppercase; color: var(--ink); }
.foot nav { margin-left: auto; display: flex; gap: 18px; }
.foot nav a { color: var(--ink-2); text-decoration: none; }
.foot nav a:hover { color: var(--arc); }

/* ---------------------------------------------------------------- narrow */
/* The orbit behind the hero must not widen the page. */
@media (max-width: 1320px) { .hero { overflow-x: clip; } }
@media (max-width: 960px) {
  .hero, .how-grid, .agents-grid, .join { grid-template-columns: minmax(0, 1fr); }
  .hero::before { right: -40%; top: 72%; }
  .four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .four li:nth-child(3) { padding-left: 0; border-left: 0; }
  .four li:nth-child(n+3) { border-top: 1px solid var(--line); margin-top: 18px; }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .top { padding-top: 16px; padding-bottom: 16px; gap: 12px; }
  .mark span { font-size: 14px; letter-spacing: .1em; }
  .mark svg { width: 26px; height: 26px; }
  .top nav .nav-cta { padding: 9px 10px; letter-spacing: .12em; }
  .kicker { font-size: 11px; letter-spacing: .08em; padding: 7px 12px 7px 10px; }
  .four { grid-template-columns: minmax(0, 1fr); }
  .four li, .four li + li { padding: 22px 0 6px; border-left: 0; }
  .four li + li { border-top: 1px solid var(--line); margin-top: 0; }
  .four li { display: grid; grid-template-columns: 54px minmax(0, 1fr); column-gap: 8px; }
  .four li::before { grid-row: span 2; font-size: 30px; margin: 0; }
  .pair { grid-template-columns: minmax(0, 1fr); }
  .log { font-size: 12.5px; padding: 14px; }
  .log li { grid-template-columns: 40px 40px minmax(0, 1fr); gap: 8px; }
  .log .say span { font-size: 14px; }
  .sec { gap: 12px; }
  .wire { grid-template-columns: minmax(0, 1fr); justify-items: start; gap: 8px; }
  .line { width: 2px; height: 46px; justify-items: start; margin-left: 20px; }
  .line i { top: 0; bottom: 0; left: 0; width: 2px; height: auto; right: auto; background: repeating-linear-gradient(180deg, var(--s-arc) 0 8px, transparent 8px 14px); }
  .line i::after { right: auto; left: -4px; top: auto; bottom: -2px; border: 5px solid transparent; border-top: 7px solid var(--s-arc); border-bottom: 0; }
  .line em { transform: none; position: absolute; left: 16px; top: 50%; translate: 0 -50%; }
  .foot nav { margin-left: 0; }
}