/* AntHocNet — the site's front page (#545): a city-builder for networks and
   ants. Day = light, night = dark; both are selected steps, never a flip. The
   ant / packet identity colours are the validated set (adjacent CVD dE >= 8.4
   in both modes) and every glyph also differs by shape. Chrome is a modern
   game HUD: floating cards, pill controls, the map as the hero. */
:root {
  color-scheme: light;
  --desk: #e9eef4;
  --desk-2: #dde5ee;
  --card: #ffffff;
  --card-2: #f5f7fa;
  --border: #d5dde7;
  --chrome-text: #0f172a;
  --well: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #3f4b5e;
  --text-muted: #556173;
  --accent: #2563eb;
  --on-accent: #ffffff;
  --accent-soft: #dbe7fd;
  --link: #1d4ed8;
  --rule: #e2e8f0;
  --elev: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.07);
  /* map */
  --sky-top: #b9dcf2;
  --sky: #e6f2fa;
  --grass-a: #8cc56b;
  --grass-b: #83bc62;
  --grass-edge: #6b5a3e;
  --slab-right: #8a7552;
  --road: #6f7377;
  --road-mark: #e9e2c4;
  --tree: #3f8f3a;
  --tree-dark: #2f7330;
  --trunk: #6b4a2b;
  --bldg-top: #e2ddd2;
  --bldg-left: #bdb5a5;
  --bldg-right: #9c9483;
  --window: #6c7f92;
  --window-lit: #ffe08a;
  --space: #060b1d;
  --star: #ffffff;
  --tower: #1f2937;
  --tower-dark: #8a8578;
  --phone: #1e293b;
  --phone-edge: #f8fafc;
  --screen: #38bdf8;
  --trail: #334155;
  --node-off: #9a978e;
  --beam: #30455c;
  --shadow: #000000;
  --panel: #2f3e66;
  --panel-blue: #3b6fb6;
  --ph: #1f5fbf;
  --text: #0b0b0b;
  --text2: #3a3936;
  --good: #0a8f0a;
  --critical: #c42f2f;
  /* ants & packets */
  --c-reactive: #eb6834;
  --c-backward: #2a78d6;
  --c-proactive: #1baf7a;
  --c-repair: #eda100;
  --c-data: #4a3aa7;
  --c-linkfail: #e34948;
  --c-hello: #f4f2ea;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --desk: #070d1a; --desk-2: #0c1527; --card: #101a2d; --card-2: #16223a; --border: #23324d;
    --chrome-text: #e6edf7; --well: #0d1628;
    --text-primary: #eef3fa; --text-secondary: #bcc7d8; --text-muted: #9aa8bd;
    --accent: #60a5fa; --on-accent: #08111f; --accent-soft: #1b2e52; --link: #93c5fd; --rule: #22304a;
    --elev: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35);
    --sky-top: #030712; --sky: #0e1a2b; --grass-a: #2c4a2a; --grass-b: #284526; --grass-edge: #2b2418; --slab-right: #3a3020;
    --road: #33363a; --road-mark: #8a8466; --tree: #2a5c2a; --tree-dark: #1f4a21; --trunk: #3e2c1a;
    --bldg-top: #4a4f58; --bldg-left: #353a42; --bldg-right: #2a2e35; --window: #20252c; --window-lit: #ffd56a;
    --space: #030611; --star: #dfe8ff; --tower: #e4e3dc; --tower-dark: #77746b; --node-off: #5a5955;
    --phone: #0b1220; --phone-edge: #94a3b8; --screen: #7dd3fc; --trail: #cbd5e1;
    --beam: #8fb4d9; --shadow: #000000; --panel: #1c2a4a; --panel-blue: #4a7fd0;
    --ph: #59a3ff; --text: #ffffff; --text2: #d2d1c8; --good: #3ccf3c; --critical: #f07070;
    --c-reactive: #d95926; --c-backward: #3987e5; --c-proactive: #199e70;
    --c-repair: #c98500; --c-data: #9085e9; --c-linkfail: #e66767; --c-hello: #c3c2b7;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --desk: #070d1a; --desk-2: #0c1527; --card: #101a2d; --card-2: #16223a; --border: #23324d;
  --chrome-text: #e6edf7; --well: #0d1628;
  --text-primary: #eef3fa; --text-secondary: #bcc7d8; --text-muted: #9aa8bd;
  --accent: #60a5fa; --on-accent: #08111f; --accent-soft: #1b2e52; --link: #93c5fd; --rule: #22304a;
  --elev: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35);
  --sky-top: #030712; --sky: #0e1a2b; --grass-a: #2c4a2a; --grass-b: #284526; --grass-edge: #2b2418; --slab-right: #3a3020;
  --road: #33363a; --road-mark: #8a8466; --tree: #2a5c2a; --tree-dark: #1f4a21; --trunk: #3e2c1a;
  --bldg-top: #4a4f58; --bldg-left: #353a42; --bldg-right: #2a2e35; --window: #20252c; --window-lit: #ffd56a;
  --space: #030611; --star: #dfe8ff; --tower: #e4e3dc; --tower-dark: #77746b; --node-off: #5a5955;
  --phone: #0b1220; --phone-edge: #94a3b8; --screen: #7dd3fc; --trail: #cbd5e1;
  --beam: #8fb4d9; --shadow: #000000; --panel: #1c2a4a; --panel-blue: #4a7fd0;
  --ph: #59a3ff; --text: #ffffff; --text2: #d2d1c8; --good: #3ccf3c; --critical: #f07070;
  --c-reactive: #d95926; --c-backward: #3987e5; --c-proactive: #199e70;
  --c-repair: #c98500; --c-data: #9085e9; --c-linkfail: #e66767; --c-hello: #c3c2b7;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: radial-gradient(1200px 600px at 50% -10%, var(--desk-2), var(--desk) 70%) fixed, var(--desk);
  color: var(--text-primary);
  font: 14px/1.5 var(--font);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-underline-offset: 2px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 8px; top: 8px; z-index: 10; background: var(--card); padding: 6px 10px; border-radius: 8px; }
.muted { color: var(--text-muted); }
.small { font-size: 0.86rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* --- controls -------------------------------------------------------------------- */
.bevel, select, input[type=number] {
  font: inherit; font-weight: 600; color: var(--chrome-text); background: var(--card-2);
  border: 1px solid var(--border); border-radius: 10px; padding: 4px 10px; min-height: 32px;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}
.bevel { cursor: pointer; }
.bevel:hover { border-color: var(--accent); }
.bevel:active { transform: translateY(1px); }
.bevel[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.bevel:disabled { opacity: 0.55; cursor: default; }
select, input[type=number] { background: var(--well); color: var(--text-primary); font-weight: 500; }
input[type=number] { width: 6.5em; }

.window {
  background: var(--card); color: var(--chrome-text);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--elev);
  min-width: 0; overflow: hidden;
}
.titlebar {
  color: var(--text-muted); font-weight: 700; font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.08em; padding: 10px 14px 4px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.window .body { color: var(--text-primary); padding: 4px 14px 12px; }
.window .body p { margin: 0 0 0.5rem; }

/* --- top bar ------------------------------------------------------------------------ */
.menubar {
  position: sticky; top: 0; z-index: 5;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; padding: 8px 16px;
  background: color-mix(in srgb, var(--card) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border); color: var(--chrome-text);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.05rem; color: var(--chrome-text); text-decoration: none; margin-right: auto; letter-spacing: -0.01em; }
.brand .sub { font-weight: 600; font-size: 0.8rem; color: var(--text-muted); padding: 2px 8px; border: 1px solid var(--border); border-radius: 999px; }
.logo { width: 28px; height: 28px; display: inline-block; border-radius: 8px; background:
  radial-gradient(circle at 26% 50%, var(--c-reactive) 0 3px, transparent 3.5px),
  radial-gradient(circle at 50% 50%, var(--c-reactive) 0 2.5px, transparent 3px),
  radial-gradient(circle at 74% 50%, var(--c-reactive) 0 3px, transparent 3.5px),
  linear-gradient(135deg, var(--grass-a), color-mix(in srgb, var(--grass-a) 60%, var(--accent))); }
.menu { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--text-secondary); }
.speeds { display: inline-flex; padding: 3px; gap: 2px; background: var(--card-2); border: 1px solid var(--border); border-radius: 12px; }
.speeds .bevel { min-width: 38px; padding: 3px 6px; border-color: transparent; background: transparent; }
.speeds .bevel[aria-pressed="true"] { background: var(--accent); }
.links { display: flex; gap: 14px; }
.links a { color: var(--text-secondary); text-decoration: none; font-weight: 600; }
.links a:hover { color: var(--accent); }

/* --- stage ------------------------------------------------------------------------------ */
.desk {
  display: grid; grid-template-columns: 150px minmax(0, 1fr) 340px; gap: 14px; padding: 14px 16px;
  align-items: start;
}
.toolbox { position: sticky; top: 64px; }
.toolbox .tools { display: grid; grid-template-columns: 1fr; gap: 4px; padding: 4px 8px 8px; }
.toolbox .tools.small { grid-template-columns: repeat(3, 1fr); }
.toolbox .tools.small .bevel { padding: 3px 0; }
.tool { display: flex; align-items: center; gap: 8px; text-align: left; font-size: 0.84rem; padding: 6px 8px; }
.tool svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.tool kbd { margin-left: auto; font: 600 0.68rem var(--mono); opacity: 0.7; }
.overlays { display: grid; gap: 4px; padding: 2px 12px 12px; font-size: 0.84rem; color: var(--text-secondary); }
.overlays input, .filters input { accent-color: var(--accent); }
.mapwin { display: flex; flex-direction: column; }
.mapwin > .titlebar { position: absolute; z-index: 1; margin: 10px; padding: 4px 10px; border-radius: 999px;
  background: color-mix(in srgb, var(--card) 85%, transparent); color: var(--text-primary); letter-spacing: 0.04em;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); box-shadow: var(--elev); pointer-events: none; }
.mapwin { position: relative; }
.map { position: relative; height: min(72vh, 760px); min-height: 400px; background: var(--sky); outline-offset: -3px; }
#view { width: 100%; height: 100%; display: block; touch-action: none; }
.map[data-tool="build"] #view { cursor: crosshair; }
.map[data-tool="bulldoze"] #view { cursor: not-allowed; }
.map[data-tool="move"] #view { cursor: grab; }
.map[data-tool="flow"] #view { cursor: alias; }
.toast {
  position: absolute; left: 50%; top: 12px; transform: translateX(-50%); margin: 0; max-width: 90%;
  background: var(--card); color: var(--text-primary); padding: 7px 14px; font-weight: 600;
  border: 1px solid var(--border); border-radius: 999px; box-shadow: var(--elev);
}
.welcome {
  position: absolute; left: 14px; bottom: 14px; max-width: 380px; margin: 0; padding: 14px 16px 12px;
  background: color-mix(in srgb, var(--card) 92%, transparent); color: var(--text-primary);
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--elev);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.welcome h1 { font-size: 1.15rem; margin: 0 28px 6px 0; letter-spacing: -0.01em; }
.welcome p { margin: 0 0 10px; color: var(--text-secondary); }
.welcome .row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.welcome .primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.welcome .close { position: absolute; right: 8px; top: 8px; min-height: 28px; width: 28px; padding: 0; background: transparent; border-color: transparent; }
.status {
  display: flex; flex-wrap: wrap; gap: 6px; padding: 8px 10px 4px; font: 600 12.5px/1.3 var(--mono);
}
.status > span {
  background: var(--card-2); color: var(--text-primary); padding: 4px 10px; font-variant-numeric: tabular-nums;
  border: 1px solid var(--border); border-radius: 999px;
}
.health { display: inline-flex; align-items: center; gap: 8px; margin-left: auto; }
.meter { width: 80px; height: 8px; border-radius: 999px; overflow: hidden; background: color-mix(in srgb, var(--good) 20%, var(--card-2)); display: inline-block; }
.meter > span { display: block; height: 100%; width: 0; background: var(--good); border-radius: 999px; transition: width 0.3s; }
.ticker {
  display: flex; gap: 10px; align-items: center; margin: 4px 10px 10px; padding: 6px 12px;
  background: var(--card-2); color: var(--text-primary); font: 500 13px/1.35 var(--font);
  border: 1px solid var(--border); border-radius: 999px; overflow: hidden; white-space: nowrap;
}
.ticker .mast { display: inline-flex; align-items: center; gap: 6px; font-weight: 800; font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.ticker .mast::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--c-linkfail); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c-linkfail) 25%, transparent); }
#news { overflow: hidden; text-overflow: ellipsis; }

.panels { display: flex; flex-direction: column; gap: 14px; }
.legend { list-style: none; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 4px 8px; font-size: 0.82rem; color: var(--text-secondary); }
.legend canvas { vertical-align: middle; margin-right: 6px; }

table.ph { width: 100%; border-collapse: collapse; font-size: 0.84rem; font-variant-numeric: tabular-nums; }
table.ph caption { text-align: left; color: var(--text-muted); font-size: 0.8rem; padding-bottom: 4px; }
table.ph th, table.ph td { text-align: right; padding: 4px; border-bottom: 1px solid var(--rule); }
table.ph th { color: var(--text-muted); font-weight: 600; font-size: 0.76rem; }
table.ph th:first-child, table.ph td:first-child { text-align: left; }
.bar { display: inline-block; height: 6px; border-radius: 3px; background: var(--ph); vertical-align: middle; }
.chip { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; background: var(--accent-soft); color: var(--text-primary); }

.logwin { margin: 0 16px 16px; }
.logwin .titlebar { justify-content: flex-start; padding-bottom: 8px; }
.logwin .titlebar .bevel { min-height: 26px; padding: 1px 10px; font-size: 0.78rem; text-transform: none; letter-spacing: 0; }
.filters { display: inline-flex; gap: 12px; font-weight: 500; margin-right: auto; text-transform: none; letter-spacing: 0; font-size: 0.82rem; color: var(--text-secondary); }
.log {
  list-style: none; margin: 0 8px 8px; padding: 8px 12px; height: 180px; overflow: auto; background: var(--well);
  border: 1px solid var(--rule); border-radius: 10px;
  font: 12px/1.6 var(--mono); color: var(--text-secondary);
}
.log li .sw { display: inline-block; width: 8px; height: 8px; margin-right: 6px; border-radius: 2px; }

/* missions */
.mission-goal { font-weight: 700; }
.stars { letter-spacing: 2px; color: #b07800; }
:root[data-theme="dark"] .stars { color: var(--c-repair); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .stars { color: var(--c-repair); } }
.progress { height: 8px; background: var(--card-2); margin: 6px 0; border-radius: 999px; overflow: hidden; border: 1px solid var(--rule); }
.progress > span { display: block; height: 100%; background: var(--accent); border-radius: 999px; transition: width 0.3s; }
.choices { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.missions { list-style: none; padding: 0; margin: 0 0 8px; display: grid; gap: 4px; }
.missions button { width: 100%; text-align: left; display: flex; justify-content: space-between; gap: 6px; font-weight: 500; }

/* --- how it works -------------------------------------------------------------------- */
.about { margin: 8px 16px 0; padding: 24px 4px 8px; }
.about h2 { font-size: 1.35rem; letter-spacing: -0.015em; margin: 0 0 4px; }
.about > p { color: var(--text-secondary); margin: 0 0 16px; max-width: 70ch; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.steps li { padding: 16px; }
.steps h3 { margin: 0 0 6px; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.steps h3 .dot { width: 12px; height: 12px; border-radius: 50%; flex: none; }
.steps p { margin: 0; color: var(--text-secondary); }
.foot { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 20px 20px 28px; color: var(--text-muted); font-size: 0.86rem; }
.foot a { color: var(--text-secondary); font-weight: 600; }

@media (max-width: 1100px) {
  .desk { grid-template-columns: 150px minmax(0, 1fr); }
  .panels { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
}
@media (max-width: 680px) {
  .desk { grid-template-columns: 1fr; padding: 8px; gap: 10px; }
  .mapwin { order: 1; }
  .toolbox { order: 2; position: static; }
  .panels { order: 3; }
  .toolbox .tools:not(.small) { grid-template-columns: repeat(5, 1fr); }
  .toolbox .tools:not(.small) .tool span, .tool kbd { display: none; }
  .tool { justify-content: center; }
  .overlays { grid-template-columns: 1fr 1fr; }
  .map { height: 58vh; min-height: 300px; }
  .links { display: none; }
  .menubar { padding: 6px 8px; gap: 6px 10px; }
  .health { margin-left: 0; }
  .logwin { margin: 0 8px 12px; }
  .welcome { left: 8px; right: 8px; bottom: 8px; max-width: none; }
  .about { margin: 0 8px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}