/* Pass the Parcel. A sorting office at night: aubergine desk, paper-cream ink,
   and five envelope colours shared by every networking explainer. */
:root {
  color-scheme: dark;
  --bg: #1b1620; --desk: #221b29; --raise: #2c2434; --rule: #41364c;
  --ink: #f3ecdf; --soft: #cfc5d3; --muted: #a79cae; --bad: #ff8a80;
  --app: #f5a524; --sec: #a78bfa; --trans: #2dd4bf; --net: #60a5fa; --link: #4ade80; --phy: #94a3b8;
  --display: "Zilla Slab", Rockwell, "Roboto Slab", Georgia, serif;
  --body: "Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--ink); font: 16px/1.5 var(--body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
button, input { font: inherit; color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; border-radius: 4px; }
code { font: 0.92em var(--mono); background: var(--raise); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere; }
a { color: var(--ink); text-underline-offset: 3px; }

.app { height: 100vh; height: 100dvh; display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr) auto; }
.top { display: flex; align-items: baseline; gap: 14px; padding: 10px 20px; border-bottom: 1px solid var(--rule); flex-wrap: wrap; }
.brand { font: 700 24px/1.1 var(--display); margin: 0; letter-spacing: 0.005em; }
.tag { margin: 0; color: var(--muted); font-size: 15px; }

.main { display: grid; grid-template-columns: minmax(0, 1fr) 390px; min-height: 0; }
.stage { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }
.panel { border-left: 1px solid var(--rule); background: var(--desk); overflow-y: auto; padding: 18px 22px 24px; min-height: 0; }

/* controls */
.tools { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; padding: 10px 18px; border-bottom: 1px solid var(--rule); }
.btn { min-height: 40px; min-width: 40px; padding: 7px 14px; border: 1px solid var(--rule); background: var(--raise); border-radius: 8px; cursor: pointer; line-height: 1.2; }
.btn:hover:not(:disabled) { border-color: var(--muted); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn[aria-pressed="true"] { background: var(--ink); color: var(--bg); border-color: var(--ink); font-weight: 700; }
.btn.sq { padding: 7px 0; width: 44px; flex: none; }
.seg { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.seglab { color: var(--muted); font-size: 14px; margin-right: 2px; }
.slab { display: flex; flex-direction: column; gap: 2px; font-size: 14px; color: var(--soft); }
.slab.grow { flex: 1 1 180px; }
input[type="range"] { width: 100%; min-height: 40px; accent-color: var(--ink); margin: 0; }

/* the parcel */
.pwrap { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 12px 18px 14px; }
.parcel { max-width: 860px; margin: 0 auto; }
.env { --c: var(--link); border: 2px solid var(--c); border-radius: 10px 10px 8px 8px; padding: 0 9px 9px; margin-top: 2px;
  background: color-mix(in srgb, var(--c) 7%, var(--bg)); }
.env-eth { --c: var(--link); } .env-ip { --c: var(--net); } .env-tcp { --c: var(--trans); } .env-tls { --c: var(--sec); } .env-http { --c: var(--app); }
.env.fresh { animation: wrap 0.45s ease-out; }
@keyframes wrap { from { transform: scale(1.03); box-shadow: 0 0 0 6px color-mix(in srgb, var(--c) 40%, transparent); } to { transform: none; box-shadow: none; } }
.env.dead { border-style: dashed; border-color: var(--bad); background: color-mix(in srgb, var(--bad) 9%, var(--bg)); }
.env.dead .inner { opacity: 0.35; }
.deadnote { margin: 0 2px 6px; color: var(--bad); font-weight: 700; font-size: 14px; }
.tab { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 9px; width: 100%; min-height: 40px; padding: 6px 2px 4px; border: 0; background: none; text-align: left; cursor: pointer; color: var(--c); }
.tab .tw { font-size: 12px; width: 10px; }
.tab .nm { font: 700 18px/1.2 var(--display); }
.tab .num { font-size: 13px; color: var(--muted); }
.tab .sz { margin-left: auto; font: 13px var(--mono); color: var(--soft); }
.bd { font-size: 12.5px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--c); color: var(--ink); }
.bd-new { background: color-mix(in srgb, var(--c) 45%, transparent); font-weight: 700; }
.bd-edit { border-style: dashed; }
.bd-same { border-color: var(--rule); color: var(--muted); }
.sum { margin: 0 2px 7px; color: var(--soft); font-size: 14.5px; overflow-wrap: anywhere; }
.bytes { margin: 0 2px 6px; font: 13px/1.6 var(--mono); color: var(--muted); overflow-wrap: anywhere; }
.msg { font: 14.5px/1.55 var(--mono); padding: 2px 4px 2px; overflow-wrap: anywhere; }
.env.sealed { background: repeating-linear-gradient(135deg, color-mix(in srgb, var(--sec) 9%, var(--bg)) 0 8px, var(--bg) 8px 16px); border-color: color-mix(in srgb, var(--app) 45%, var(--bg)); }
.env.sealed .tab { color: color-mix(in srgb, var(--app) 60%, var(--muted)); }
.cells { display: flex; flex-wrap: wrap; gap: 5px; margin: 2px 0 9px; }
.cell { flex: 1 1 auto; min-width: 76px; min-height: 44px; padding: 5px 8px 6px; text-align: left; cursor: pointer; border-radius: 5px;
  border: 1px solid color-mix(in srgb, var(--c) 50%, transparent); background: color-mix(in srgb, var(--c) 13%, var(--bg)); }
.cell:hover { background: color-mix(in srgb, var(--c) 22%, var(--bg)); }
.cell .n { display: block; font-size: 12.5px; color: var(--c); line-height: 1.25; }
.cell .v { display: block; font: 14px/1.35 var(--mono); overflow-wrap: anywhere; }
.cell .h { display: block; font: 11.5px/1.3 var(--mono); color: var(--muted); white-space: pre-wrap; }
.cell .old { display: block; font: 12.5px/1.3 var(--mono); color: var(--muted); text-decoration: line-through; overflow-wrap: anywhere; }
.cell.chg { background: color-mix(in srgb, var(--c) 34%, var(--bg)); border-color: var(--c); }
.cell.sel { outline: 2px solid var(--ink); outline-offset: 1px; }
.signal { margin: 8px 2px 0; padding: 7px 12px; border: 2px dotted var(--phy); border-radius: 8px; color: var(--phy); font-size: 14.5px; }

/* things under (or, with .xtop, above) the parcel */
.pwrap { display: flex; flex-direction: column; }
.pwrap > * { width: 100%; flex: none; }
.pwrap.xtop .extra { order: -1; margin: 0 auto 10px; }
.extra { max-width: 860px; margin: 10px auto 0; }
.cap { margin: 0 0 8px; color: var(--soft); font-size: 15px; }
.cap.big { font-size: 16.5px; color: var(--ink); min-height: 3em; }
.widget { border: 1px solid var(--rule); background: var(--desk); border-radius: 10px; padding: 12px 14px; }
.wt { margin: 0 0 8px; font-size: 15px; }
.fine { margin: 8px 0 0; font-size: 13.5px; color: var(--muted); }
.progs { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 5px; }
.progs li { display: flex; gap: 12px; padding: 7px 10px; border: 1px solid var(--rule); border-radius: 6px; color: var(--muted); }
.progs li.on { border-color: var(--trans); color: var(--ink); background: color-mix(in srgb, var(--trans) 14%, var(--bg)); }
.pp { font: 14px/1.6 var(--mono); flex: none; }
.wbar { display: flex; gap: 2px; height: 46px; }
.ws { flex: 1 1 0; min-width: 4px; border-radius: 4px; overflow: hidden; display: flex; align-items: center; justify-content: center; color: #16111a; font: 700 12.5px var(--body); white-space: nowrap; }
.ws span { padding: 0 4px; }
.c-eth { --c: var(--link); } .c-ip { --c: var(--net); } .c-tcp { --c: var(--trans); } .c-tls { --c: var(--sec); } .c-http { --c: var(--app); } .c-phy { --c: var(--phy); }
.ws { background: var(--c); }
.wsum { margin: 10px 0 8px; font-size: 15px; }
.pkts { display: flex; flex-wrap: wrap; gap: 3px; }
.pk { height: 18px; border: 2px solid var(--link); border-radius: 3px; background: color-mix(in srgb, var(--net) 40%, var(--bg)); }
.tally { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; margin: 0; }
.tally div { border: 1px solid var(--rule); border-radius: 8px; padding: 8px 10px; background: var(--desk); }
.tally dt { font-size: 13px; color: var(--muted); line-height: 1.3; }
.tally dd { margin: 2px 0 0; font: 700 24px/1.1 var(--display); }
.log { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.log li { border-left: 4px solid var(--c); padding: 5px 10px; background: var(--desk); border-radius: 0 6px 6px 0; font-size: 14.5px; }
.log li.bad { border-left-color: var(--bad); color: var(--bad); }
.osi { width: 100%; border-collapse: collapse; font-size: 14.5px; margin-top: 4px; }
.osi caption { text-align: left; color: var(--muted); font-size: 13.5px; padding-bottom: 4px; }
.osi th, .osi td { text-align: left; padding: 4px 8px; border-top: 1px solid var(--rule); font-weight: 400; }
.osi th { width: 2em; font: 700 16px var(--display); color: var(--c); }
.osi td:last-child { color: var(--c); }
.osi tr:nth-child(3) td:last-child, .osi tr:nth-child(4) td:last-child { font-style: italic; }

/* inspector */
.insp { border-top: 1px solid var(--rule); padding: 9px 18px; min-height: 64px; max-height: 190px; overflow-y: auto; background: var(--desk); }
.insp p { margin: 0 0 4px; max-width: 78ch; font-size: 15px; }
.hint { color: var(--muted); }
.ihead strong { font: 700 17px var(--display); margin-right: 12px; }
.ibytes { font: 13px var(--mono); color: var(--muted); white-space: pre-wrap; }
.rt { color: var(--soft); }
.verdict { padding: 6px 10px; border-radius: 6px; border-left: 4px solid var(--link); background: var(--raise); }
.verdict.bad { border-left-color: var(--bad); }

/* journey strip */
.journey { border-top: 1px solid var(--rule); padding: 6px 18px 8px; }
.strip { overflow: hidden; }
.strip svg { display: block; cursor: pointer; max-width: 100%; }
.capline { display: flex; flex-wrap: wrap; gap: 0 18px; align-items: baseline; }
.band { fill: color-mix(in srgb, var(--ink) 10%, transparent); stroke: color-mix(in srgb, var(--ink) 35%, transparent); }
.node { fill: var(--bg); stroke: var(--ink); stroke-width: 2; }
.nlab { font: 12.5px var(--body); fill: var(--soft); }
.lane { font: 700 12px var(--body); }
.hopctl { display: flex; gap: 8px; align-items: center; margin-top: 2px; }
.hopcap { margin: 2px 0 0; font-size: 14.5px; }
.legend { margin: 0; font-size: 13px; color: var(--muted); }

/* panel */
.step { margin: 0; color: var(--muted); font-size: 14px; }
.panel h2 { font: 700 30px/1.12 var(--display); margin: 2px 0 12px; }
.panel h3 { font: 700 16px/1.3 var(--body); margin: 18px 0 4px; color: var(--soft); }
.panel p { margin: 0 0 9px; max-width: 62ch; }
.panel ul { margin: 0; padding-left: 20px; }
.panel li { margin-bottom: 5px; }
.mix { border-left: 3px solid var(--app); padding-left: 12px; }
.mix h3 { margin-top: 0; }
.panel section.mix { margin-top: 18px; }
.start { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; width: 100%; min-height: 44px; margin: 6px 0 0; padding: 9px 12px; text-align: left;
  border: 1px solid var(--rule); background: var(--raise); border-radius: 8px; cursor: pointer; font-weight: 700; }
.start:hover { border-color: var(--muted); }
.start small { font-weight: 400; color: var(--muted); font-size: 13.5px; white-space: nowrap; }
.nextl a { font-weight: 700; }
.foot { margin-top: 22px; padding-top: 12px; border-top: 1px solid var(--rule); font-size: 14.5px; color: var(--muted); }
.foot p { margin: 0 0 4px; }
.foot a { display: inline-block; padding: 9px 2px; }

/* scene nav */
.nav { display: flex; gap: 10px; align-items: center; padding: 8px 14px; border-top: 1px solid var(--rule); background: var(--desk); }
.pills { flex: 1 1 auto; min-width: 0; display: flex; gap: 4px; list-style: none; margin: 0; padding: 3px; overflow-x: auto; scrollbar-width: thin; }
.pills li { flex: 0 0 auto; }
.pill { min-height: 40px; min-width: 40px; padding: 6px 8px; border: 1px solid transparent; background: none; border-radius: 8px; cursor: pointer; color: var(--muted); white-space: nowrap; font-size: 14px; }
.pill .pn { font: 700 15px var(--display); margin-right: 5px; }
.pill:hover { color: var(--ink); border-color: var(--rule); }
.pill[aria-current] { background: var(--ink); color: var(--bg); font-weight: 700; }

@media (max-width: 1100px) {
  .pill .pt { display: none; } .pill .pn { margin: 0; }
  .pill[aria-current] .pt { display: inline; margin-left: 6px; }
}
@media (max-width: 860px) {
  html, body { height: auto; }
  .app { display: block; height: auto; padding-bottom: 60px; }
  .main { display: block; }
  .top { padding: 9px 14px; gap: 2px 12px; }
  .brand { font-size: 21px; }
  .tools { padding: 8px 12px; }
  .pwrap { overflow: visible; padding: 10px 10px 12px; }
  .env { padding: 0 5px 6px; border-radius: 8px; }
  .tab .nm { font-size: 16.5px; }
  .cell { min-width: 64px; }
  .insp { padding: 9px 12px; max-height: none; }
  .journey { padding: 6px 10px 8px; }
  .panel { border-left: 0; border-top: 1px solid var(--rule); overflow: visible; padding: 16px 16px 24px; }
  .panel h2 { font-size: 26px; }
  .tally { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav { position: fixed; left: 0; right: 0; bottom: 0; padding: 6px 8px; gap: 6px; z-index: 5; }
  .nav .btn { padding: 7px 10px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}