:root {
  --bg: #050505; --grid: rgba(255, 255, 255, 0.045); --card: rgba(18, 18, 18, 0.86);
  --card2: #161616; --line: #262626; --line2: #333;
  --text: #f2f2f2; --dim: #9a9a9a; --faint: #5f5f5f;
  --green: #3ee43e; --green-d: #1f8a1f; --green-bg: rgba(62, 228, 62, 0.10);
  --amber: #ffbf3f; --amber-bg: rgba(255, 191, 63, 0.18); --blue: #7fb8ff;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
}
* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0; color: var(--text); font: 15px/1.55 var(--sans); background: var(--bg);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px),
                    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px; background-attachment: fixed;
}
code, pre, .mono { font-family: var(--mono); }
code { font-size: .9em; color: var(--green); }

/* hero */
.hero { display: grid; grid-template-columns: minmax(0, 520px) minmax(0, 1fr); gap: 32px; align-items: center;
  max-width: 1400px; margin: 0 auto; padding: 28px 24px 8px; }
.logo { width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--line); display: block; }
.kicker { margin: 0; color: var(--green); font: 600 12px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; }
.hero h1 { margin: 10px 0 10px; font-size: clamp(24px, 3vw, 36px); line-height: 1.12; letter-spacing: -.02em; font-weight: 700; }
.lede { margin: 0; color: var(--dim); max-width: 62ch; font-size: 16px; }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; gap: 16px; padding: 16px 16px 4px; } }

/* tool picker */
.tools { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 10px;
  max-width: 1400px; margin: 18px auto 0; padding: 0 24px; }
@media (max-width: 1100px) { .tools { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 560px) { .tools { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 0 16px; } }
.tool { text-align: left; background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 14px; color: var(--text); cursor: pointer; font: inherit;
  transition: border-color .15s ease, transform .15s ease, background-color .15s ease; }
.tool:hover { border-color: var(--line2); transform: translateY(-1px); }
.tool[aria-pressed="true"] { border-color: var(--green); background: linear-gradient(180deg, var(--green-bg), var(--card)); }
.tool .t { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; }
.tool .ico { font-family: var(--mono); color: var(--green); font-size: 13px; border: 1px solid var(--green-d);
  border-radius: 6px; padding: 0 6px; }
.tool .d { color: var(--dim); font-size: 12.5px; margin-top: 4px; line-height: 1.35; }

/* stats */
.statbar { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px;
  max-width: 1400px; margin: 14px auto 0; padding: 0 24px; }
@media (max-width: 860px) { .statbar { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 0 16px; } }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; }
.stat b { display: block; font: 700 22px/1.2 var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.stat b.ok { color: var(--green); }
.stat span { color: var(--dim); font-size: 12px; }

/* layout */
.grid { display: grid; grid-template-columns: minmax(300px, 0.85fr) minmax(0, 1.55fr); gap: 14px;
  max-width: 1400px; margin: 14px auto 0; padding: 0 24px; }
@media (max-width: 1000px) { .grid { grid-template-columns: 1fr; padding: 0 16px; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 16px; min-width: 0;
  backdrop-filter: blur(6px); }
.card-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.card-head h2 { margin: 0; font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--faint); }
.dot.live.on { background: var(--green); box-shadow: 0 0 10px var(--green); }
.isa { margin-left: auto; font: 600 12px var(--mono); color: var(--green); border: 1px solid var(--green-d);
  border-radius: 999px; padding: 2px 10px; }

/* chat */
.messages { display: flex; flex-direction: column; gap: 10px; max-height: 72vh; overflow: auto; padding-right: 4px; }
.msg { border-radius: 12px; padding: 10px 12px; max-width: 100%; transition: opacity .25s ease; }
.msg.future { opacity: .18; }
.msg .who { font: 600 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--faint); margin-bottom: 4px; }
.msg.user { background: #1d1d1d; border: 1px solid var(--line2); align-self: flex-end; max-width: 92%; }
.msg.qwen { background: transparent; border: 1px solid var(--line); }
.msg.qwen .body { white-space: pre-wrap; }
.call { background: #0c140c; border: 1px solid var(--green-d); }
.call .fn { font: 600 14px var(--mono); color: var(--green); }
.call .args { margin: 6px 0 0; font: 12.5px/1.5 var(--mono); color: var(--text); white-space: pre-wrap; word-break: break-word; }
.call .args .k { color: var(--dim); }
.resp { background: #0b0f17; border: 1px solid #23354f; }
.resp pre { margin: 6px 0 0; font: 13px/1.5 var(--mono); color: var(--blue); white-space: pre-wrap; word-break: break-word; }
.ran { display: inline-flex; align-items: center; gap: 6px; font: 500 11.5px var(--mono); color: var(--green);
  background: var(--green-bg); border-radius: 999px; padding: 2px 10px; }

/* machine */
.transport { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.btn { background: var(--card2); color: var(--text); border: 1px solid var(--line2); border-radius: 9px;
  padding: 7px 14px; font: 500 13px var(--sans); cursor: pointer; transition: border-color .15s, background-color .15s; }
.btn:hover { border-color: var(--green-d); }
.btn.primary { background: var(--green); color: #031103; border-color: var(--green); font-weight: 700; min-width: 96px; }
.btn.primary:hover { background: #5af05a; }
.speed { margin-left: auto; color: var(--dim); font-size: 13px; display: flex; gap: 8px; align-items: center; }
select { background: var(--card2); color: var(--text); border: 1px solid var(--line2); border-radius: 8px; padding: 5px 8px; font: inherit; }
.timeline { margin: 12px 0 8px; }
#timeline { width: 100%; height: 54px; display: block; border-radius: 9px; background: #0a0a0a; border: 1px solid var(--line); }
#scrub { width: 100%; margin: 8px 0 2px; accent-color: var(--green); }
.where { color: var(--dim); font: 12px var(--mono); font-variant-numeric: tabular-nums; }
.panes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 6px; }
@media (max-width: 760px) { .panes { grid-template-columns: 1fr; } }
.pane { background: #0b0b0b; border: 1px solid var(--line); border-radius: 11px; padding: 10px 12px; min-width: 0; }
.pane h3 { margin: 0 0 8px; font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--dim);
  display: flex; flex-wrap: wrap; gap: 8px; align-items: baseline; }
.pane h3 .sub { text-transform: none; letter-spacing: 0; font-weight: 400; color: var(--faint); font-size: 11.5px; }
.sw { display: inline-block; width: 9px; height: 9px; border-radius: 2px; vertical-align: -1px; }
.sw.hot { background: var(--amber); } .sw.old { background: var(--green-d); }
.pcv { font: 600 12px var(--mono); color: var(--amber); text-transform: none; letter-spacing: 0; }
.regs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2px 10px; font: 12px/1.6 var(--mono); }
.reg { display: flex; justify-content: space-between; gap: 6px; padding: 0 6px; border-radius: 5px; transition: background-color .3s; }
.reg i { font-style: normal; color: var(--faint); }
.reg span { color: var(--text); font-variant-numeric: tabular-nums; }
.reg span .z { color: #3a3a3a; }
.reg.hot { background: var(--amber-bg); }
.reg.hot span { color: var(--amber); }
.flags { display: flex; gap: 5px; margin-top: 8px; flex-wrap: wrap; }
.flag { font: 600 11px var(--mono); padding: 2px 7px; border-radius: 5px; border: 1px solid var(--line2); color: var(--faint); }
.flag.on { color: #031103; background: var(--green); border-color: var(--green); }
.code { list-style: none; margin: 0; padding: 0; font: 12px/1.65 var(--mono); }
.code li { display: flex; gap: 12px; padding: 0 6px; border-radius: 5px; white-space: nowrap; overflow: hidden; color: var(--dim); }
.code li .a { color: var(--faint); }
.code li.now { background: var(--amber-bg); color: var(--text); }
.code li.now .a { color: var(--amber); }
#ram { width: 100%; max-width: 300px; aspect-ratio: 1; image-rendering: pixelated; border-radius: 8px;
  background: #000; display: block; border: 1px solid var(--line); }
.console { margin: 0; background: #000; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
  min-height: 120px; max-height: 260px; overflow: auto; font: 13px/1.5 var(--mono); color: var(--green); white-space: pre-wrap; word-break: break-word; }

/* how it works */
.how { max-width: 1400px; margin: 22px auto 40px; padding: 0 24px; }
.how h2 { font-size: 20px; letter-spacing: -.01em; margin: 0 0 12px; }
.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } .how { padding: 0 16px; } }
.steps li { counter-increment: s; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; color: var(--dim); font-size: 14px; }
.steps li::before { content: "0" counter(s); display: block; font: 700 13px var(--mono); color: var(--green); margin-bottom: 6px; }
.steps li b { color: var(--text); display: block; margin-bottom: 4px; }
.note, .credit { color: var(--dim); font-size: 13.5px; max-width: 100ch; }
.credit a { color: var(--green); }

/* the animated banner (banner.html: the recorded C-compiler run) */
.banner { max-width: 1400px; margin: 0 auto; padding: 18px 24px 0; }
.banner iframe { display: block; width: 100%; aspect-ratio: 16 / 5; border: 1px solid var(--line); border-radius: 16px; background: #050505; }
.hero { grid-template-columns: 1fr; padding-top: 18px; }
@media (max-width: 860px) { .banner { padding: 12px 16px 0; } }

/* v2 memory section (memory.js, data/memory.json) */
.mem { max-width: 1400px; margin: 28px auto 0; padding: 0 24px; }
.mem h2 { font-size: 22px; letter-spacing: -.01em; margin: 6px 0 8px; }
.memtabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 12px; }
.memtab { background: var(--card); color: var(--text); border: 1px solid var(--line); border-radius: 10px;
  padding: 9px 14px; font: 600 14px var(--sans); cursor: pointer; }
.memtab:hover { border-color: var(--line2); }
.memtab[aria-selected="true"] { border-color: var(--green); color: var(--green); background: var(--green-bg); }
.memgrid { display: grid; grid-template-columns: minmax(260px, 0.55fr) minmax(0, 1.45fr); gap: 14px; }
@media (max-width: 980px) { .memgrid { grid-template-columns: 1fr; } }
.memops { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.memops li { border: 1px solid var(--line); border-radius: 9px; padding: 8px 10px; cursor: pointer;
  font: 12.5px/1.45 var(--mono); color: var(--dim); }
.memops li b { color: var(--text); font-weight: 600; }
.memops li.done { color: var(--text); }
.memops li.now { border-color: var(--amber); background: var(--amber-bg); color: var(--text); }
#mem-cells { width: 100%; height: auto; display: block; background: #050505; border: 1px solid var(--line);
  border-radius: 10px; image-rendering: pixelated; }
.sub2 { margin-left: auto; color: var(--dim); font-size: 12px; }
.sw.w { background: var(--amber); } .sw.r { background: var(--blue); }
.memresult { margin-top: 10px; }
.memresult .label { font: 600 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.memresult pre { margin: 6px 0 0; background: #000; border: 1px solid var(--line); border-radius: 9px;
  padding: 10px 12px; font: 13px/1.5 var(--mono); color: var(--blue); white-space: pre-wrap; min-height: 22px; }
.vbtext { font: 15px/1.9 var(--mono); background: #000; border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; white-space: pre-wrap; }
.vbtext span { border-radius: 3px; }
.picgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-top: 10px; }
.pic { background: #0b0b0b; border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.pic img { width: 100%; aspect-ratio: 1; image-rendering: pixelated; border-radius: 6px; display: block; }
.pic .meta { margin-top: 8px; font: 11px/1.5 var(--mono); color: var(--dim); }
.pic .ok { color: var(--green); font-weight: 700; }
.arops { display: flex; gap: 6px; margin: 10px 0; flex-wrap: wrap; }
.artable-wrap { overflow-x: auto; }
.artable { width: 100%; border-collapse: collapse; font: 12.5px/1.5 var(--mono); }
.artable th { text-align: left; color: var(--dim); font-weight: 600; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.artable td { padding: 6px 8px; border-bottom: 1px solid #151515; vertical-align: top; word-break: break-all; }
.artable .yes { color: var(--green); } .artable .no { color: #ff6b6b; }
@media (max-width: 560px) { .mem { padding: 0 16px; } }
.chatcols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 10px; }
@media (max-width: 900px) { .chatcols { grid-template-columns: 1fr; } }
.chath { margin: 0 0 8px; font: 600 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.chatcols .messages { max-height: none; }
.resp.bypy { background: #140f06; border-color: #4f3c1c; }
.resp.bypy pre { color: var(--amber); }