:root, [data-theme="dark"] {
  --bg: #0a0a0a;
  --panel: #141414;
  --line: #2e2e2e;
  --strong: #f2f2f2;
  --ink: #d4d4d4;
  --dim: #808080;
  --accent: #ffffff;
  --accent-ink: #000000;
  --code-bg: #000000;
  --code-ink: #e6e6e6;
  --shadow: #3a3a3a;
  --grid: rgba(255,255,255,.035);
}
[data-theme="light"] {
  --bg: #fafafa;
  --panel: #ffffff;
  --line: #d4d4d4;
  --strong: #0a0a0a;
  --ink: #2b2b2b;
  --dim: #777777;
  --accent: #000000;
  --accent-ink: #ffffff;
  --code-bg: #111111;
  --code-ink: #f0f0f0;
  --shadow: #c8c8c8;
  --grid: rgba(0,0,0,.045);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@supports not selector(::-webkit-scrollbar) {
  * { scrollbar-width: thin; scrollbar-color: #ffffff #000000; }
}
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: #000000; }
*::-webkit-scrollbar-thumb { background: #ffffff; border-radius: 0; border: 2px solid #000000; }
*::-webkit-scrollbar-thumb:hover { background: #d4d4d4; }
*::-webkit-scrollbar-corner { background: #000000; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "IBM Plex Mono", ui-monospace, monospace; font-size: 15px; line-height: 1.75;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 16px 16px;
  transition: background-color .15s steps(2), color .15s steps(2);
}
::selection { background: var(--accent); color: var(--accent-ink); }
a { color: var(--strong); text-underline-offset: 4px; }
a:hover { background: var(--accent); color: var(--accent-ink); }
h1, h2, h3, .px { font-family: "Press Start 2P", monospace; font-weight: normal; line-height: 1.6; color: var(--strong); }

.layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); min-height: 100vh; }
aside {
  position: sticky; top: 0; height: 100vh; overflow: auto; background: var(--panel);
  border-right: 3px solid var(--strong); padding: 24px 20px;
}
.art { font-family: "DejaVu Sans Mono", Consolas, Menlo, monospace; white-space: pre; line-height: 1; color: var(--strong); margin: 0; letter-spacing: 0; }
aside .art { font-size: 22px; margin-bottom: 10px; }
.hero .art { font-size: 56px; margin-bottom: 18px; text-shadow: 4px 4px 0 var(--shadow); }
.logo { font-size: 18px; margin: 0 0 6px; text-shadow: 3px 3px 0 var(--shadow); }
.ver { color: var(--dim); font-size: 13px; margin-bottom: 18px; }
.gh { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; font-size: 13px; text-decoration: none; color: var(--strong); }
.gh svg { flex: none; }
.toggle {
  width: 100%; font: inherit; font-size: 13px; cursor: pointer; margin-bottom: 20px;
  background: var(--bg); color: var(--strong); border: 2px solid var(--strong); padding: 6px 10px;
  box-shadow: 3px 3px 0 var(--shadow); text-align: left;
}
.toggle:hover { background: var(--accent); color: var(--accent-ink); }
.toggle:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--shadow); }
nav .grp { font-family: "Press Start 2P"; font-size: 9px; color: var(--dim); margin: 20px 0 6px; }
nav a { display: block; padding: 2px 8px; margin: 1px 0; text-decoration: none; color: var(--ink); border-left: 3px solid transparent; }
nav a::before { content: "> "; color: var(--dim); }
nav a:hover { background: var(--accent); color: var(--accent-ink); border-left-color: var(--accent); }
nav a:hover::before { color: var(--accent-ink); }

main { padding: 56px 56px 110px; max-width: 920px; min-width: 0; }
.hero h1 { font-size: 40px; margin: 0 0 18px; text-shadow: 4px 4px 0 var(--shadow); }
.hero p { font-size: 17px; margin: 0 0 22px; color: var(--strong); max-width: 600px; }
.blink { animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

section { margin-top: 64px; }
h2 { font-size: 16px; margin: 0 0 20px; padding-bottom: 12px; border-bottom: 3px dashed var(--line); }
h2::before { content: "■ "; }
h3 { font-size: 11px; color: var(--dim); margin: 26px 0 10px; }
p { margin: 10px 0; }
code { background: var(--accent); color: var(--accent-ink); padding: 0 6px; font-size: 13.5px; }
pre {
  background: var(--code-bg); color: var(--code-ink); border: 3px solid var(--strong);
  box-shadow: 6px 6px 0 var(--shadow); padding: 16px 18px; overflow: auto; margin: 16px 6px 24px 0;
  font-size: 13.5px; line-height: 1.65;
}
pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
pre .c { color: #7d7d7d; }

.box { background: var(--panel); border: 3px solid var(--strong); box-shadow: 6px 6px 0 var(--shadow); padding: 12px 18px; margin: 16px 6px 24px 0; }
.box b { color: var(--strong); }

table { width: calc(100% - 6px); border-collapse: collapse; background: var(--panel); border: 3px solid var(--strong); margin: 16px 0 24px; }
th, td { text-align: left; padding: 8px 12px; border: 1px solid var(--line); vertical-align: top; }
th { font-family: "Press Start 2P"; font-size: 9px; font-weight: normal; background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
td:first-child { white-space: nowrap; color: var(--strong); }

.tag { font-family: "Press Start 2P"; font-size: 8px; padding: 3px 6px; border: 2px solid var(--strong); background: var(--accent); color: var(--accent-ink); }
.tag.p { background: transparent; color: var(--strong); }
.tag.g { background: transparent; color: var(--dim); border-color: var(--dim); }

footer { margin-top: 80px; color: var(--dim); border-top: 3px dashed var(--line); padding-top: 16px; font-size: 13px; }

.menu-btn { display: none; }

@media (max-width: 800px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  aside { position: sticky; top: 0; z-index: 10; height: auto; max-height: 100vh; border-right: 0; border-bottom: 3px solid var(--strong); }
  .menu-btn {
    display: flex; flex-direction: column; justify-content: center; gap: 5px;
    position: absolute; top: 20px; right: 20px; width: 44px; height: 40px; padding: 0 9px; cursor: pointer;
    background: var(--bg); border: 2px solid var(--strong); box-shadow: 3px 3px 0 var(--shadow);
  }
  .menu-btn span { display: block; height: 3px; background: var(--strong); transition: transform .15s steps(3), opacity .15s steps(2); }
  .menu-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--shadow); }
  aside.open .menu-btn span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  aside.open .menu-btn span:nth-child(2) { opacity: 0; }
  aside.open .menu-btn span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
  nav { display: none; }
  aside.open nav { display: block; }
  aside:not(.open) .toggle { margin-bottom: 0; }
  aside:not(.open) .ver { margin-bottom: 12px; }
  main { padding: 28px 20px 64px; }
  .hero h1 { font-size: 26px; }
}

.sr { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.demo {
  --t-ink: #e6e6e6; --t-dim: #7d7d7d; --t-cyan: #33e3fa; --t-green: #3fb950; --t-yellow: #e3b341; --t-box: #282828; --t-side: #181818;
  background: #000; color: var(--t-ink); border: 3px solid var(--strong); box-shadow: 6px 6px 0 var(--shadow);
  margin: 16px 6px 24px 0; max-width: 820px;
}
.demo-bar { display: flex; justify-content: space-between; align-items: center; padding: 4px 10px; border-bottom: 2px solid #2e2e2e; color: var(--t-dim); font-size: 12px; }
.demo-bar button {
  font: inherit; font-size: 11px; cursor: pointer; background: transparent; color: var(--t-ink);
  border: 1px solid #555; padding: 0 8px;
}
.demo-bar button:hover { background: var(--t-ink); color: #000; }
.demo-screen { display: grid; grid-template-columns: minmax(0, 1fr) 200px; height: 430px; font-size: 12.5px; line-height: 1.5; }
.demo-chat { display: flex; flex-direction: column; padding: 10px 12px 10px; min-width: 0; min-height: 0; }
.demo-log { flex: 1; min-height: 0; display: flex; flex-direction: column; justify-content: flex-end; overflow: hidden; }
.demo-log .ln { white-space: pre-wrap; overflow-wrap: anywhere; min-height: 1.5em; }
.demo-log .blk::before { content: "▌ "; color: var(--c); }
.demo-log .u { --c: var(--t-cyan); }
.demo-log .k { --c: var(--t-green); }
.demo-log .hd { font-weight: 600; }
.demo-log .hd.u { color: var(--t-cyan); }
.demo-log .hd.k { color: var(--t-green); }
.demo-log .dim { color: var(--t-dim); }
.demo-status { min-height: 1.5em; color: var(--t-dim); }
.demo-suggest, .demo-choice { border: 1px solid var(--t-cyan); padding: 2px 8px; margin: 4px 0; }
.demo-choice { border-color: var(--t-yellow); }
.demo-suggest .row, .demo-choice .row { display: flex; flex-wrap: wrap; gap: 0 12px; padding: 0 4px; }
.demo-suggest .row span:first-child { min-width: 9ch; }
.demo-suggest .row span:last-child { color: var(--t-dim); }
.demo-suggest .row.on, .demo-choice .row.on { background: var(--t-ink); color: #000; }
.demo-suggest .row.on span:last-child { color: #333; }
.demo-choice .ttl { color: var(--t-yellow); }
.demo-choice .hint { color: var(--t-dim); }
.demo-prompt { background: var(--t-box); border-left: 4px solid var(--t-cyan); padding: 6px 12px; margin-top: 6px; }
.demo-input-row { min-height: 3em; overflow-wrap: anywhere; }
#demo-input:empty::before { content: "Message..."; color: var(--t-dim); }
.demo-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0 12px; color: var(--t-dim); }
.demo .cursor { display: inline-block; width: .6em; height: 1.1em; background: var(--t-ink); vertical-align: text-bottom; margin-left: 1px; animation: blink 1s steps(2) infinite; }
.demo-side { background: var(--t-side); padding: 10px 12px; overflow: hidden; font-size: 12px; }
.demo-side .art { font-size: 12px; line-height: 1.1; color: var(--t-ink); text-shadow: none; margin-bottom: 14px; }
.demo-side .side-h { color: var(--t-dim); margin: 14px 0 4px; }
.demo-side .side-dim { color: var(--t-dim); }
.demo-side .side-row { display: flex; justify-content: space-between; gap: 8px; }
.demo-side .side-row span:first-child { color: var(--t-dim); }

@media (max-width: 800px) {
  .demo-screen { grid-template-columns: 1fr; height: 380px; font-size: 11.5px; }
  .demo-side { display: none; }
}