@font-face { font-family: "Chakra Petch"; font-weight: 600; font-display: swap; src: url(vendor/fonts/chakra-petch-latin-600-normal.woff2) format("woff2"); }
@font-face { font-family: "Public Sans"; font-weight: 400; font-display: swap; src: url(vendor/fonts/public-sans-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "Public Sans"; font-weight: 600; font-display: swap; src: url(vendor/fonts/public-sans-latin-600-normal.woff2) format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 400; font-display: swap; src: url(vendor/fonts/jetbrains-mono-latin-400-normal.woff2) format("woff2"); }

:root {
  --film: #EEF0EA;      /* drafting film */
  --sheet: #F8F9F5;     /* raised surfaces */
  --graphite: #1B2027;  /* ink */
  --lead: #5E6670;      /* secondary ink */
  --rule: #C9CDC4;      /* hairlines */
  --cobalt: #3B4CCA;    /* shielded */
  --cobalt-soft: #E3E6F8;
  --amber: #F2A900;     /* the bolt: Lightning only */
  --rust: #B4400E;      /* errors */
  --ok: #2E7D4F;
  --display: "Chakra Petch", "Arial Narrow", sans-serif;
  --body: "Public Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --film: #14171C; --sheet: #1C2027; --graphite: #E6E8E3; --lead: #9AA2AB; --rule: #2F353D;
    --cobalt: #8C98F2; --cobalt-soft: #232846; --amber: #F2B92A; --rust: #F08A5D; --ok: #6CC793;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --film: #14171C; --sheet: #1C2027; --graphite: #E6E8E3; --lead: #9AA2AB; --rule: #2F353D;
  --cobalt: #8C98F2; --cobalt-soft: #232846; --amber: #F2B92A; --rust: #F08A5D; --ok: #6CC793;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--film); color: var(--graphite);
  font: 400 16px/1.55 var(--body);
  /* a faint drafting grid */
  background-image: linear-gradient(var(--rule) 1px, transparent 1px), linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 48px 48px; background-position: -1px -1px;
  background-attachment: fixed;
}
body::before { content: ""; position: fixed; inset: 0; background: var(--film); opacity: .82; pointer-events: none; z-index: -1; }
a { color: var(--cobalt); }
:focus-visible { outline: 2px solid var(--cobalt); outline-offset: 2px; }
code, .mono { font-family: var(--mono); font-size: .86em; }

.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 14px clamp(16px, 4vw, 48px); border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--sheet) 80%, transparent); backdrop-filter: blur(6px); position: sticky; top: 0; z-index: 5; }
.mark { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--graphite); font: 600 20px/1 var(--display); letter-spacing: .04em; text-transform: uppercase; }
.mark svg { width: 28px; height: 28px; }
.mark-shield { fill: var(--cobalt); }
.mark-bolt { fill: var(--amber); }
.meter { display: flex; gap: 22px; margin: 0; flex-wrap: wrap; }
.meter div { display: flex; flex-direction: column; }
.meter dt { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--lead); }
.meter dd { margin: 0; font: 400 14px/1.3 var(--mono); }

main { max-width: 1120px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 48px); }

.thesis { padding: clamp(40px, 8vw, 88px) 0 28px; }
.thesis h1 { font: 600 clamp(28px, 4.4vw, 50px)/1.06 var(--display); letter-spacing: -.01em; margin: 0 0 18px; max-width: 24ch; }
.thesis h1 span { color: var(--cobalt); }
.lede { color: var(--lead); max-width: 62ch; margin: 0; }

.panel { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; margin: 24px 0 56px; box-shadow: 0 1px 0 var(--rule), 0 18px 40px -28px rgb(20 24 40 / .35); }
.switch { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--rule); }
.switch button { font: 600 15px/1 var(--display); letter-spacing: .05em; text-transform: uppercase; padding: 18px 12px; border: 0; background: transparent; color: var(--lead); cursor: pointer; position: relative; }
.switch button i { font-style: normal; color: var(--amber); }
.switch button[aria-selected="true"] { color: var(--graphite); }
.switch button[aria-selected="true"]::after { content: ""; position: absolute; left: 18%; right: 18%; bottom: -1px; height: 3px; background: var(--cobalt); border-radius: 3px 3px 0 0; }
.switch button + button { border-left: 1px solid var(--rule); }

.work { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); }
@media (max-width: 860px) { .work { grid-template-columns: 1fr; } .swap { border-left: 0 !important; border-top: 1px solid var(--rule); } }

.form { display: flex; flex-direction: column; padding: 28px; gap: 6px; min-width: 0; }
.form label { font-weight: 600; font-size: 14px; margin-top: 12px; }
.form label:first-child { margin-top: 0; }
.form label small { font-weight: 400; color: var(--lead); }
.form input, .form textarea {
  font: 400 14px/1.4 var(--mono); color: var(--graphite); background: var(--film);
  border: 1px solid var(--rule); border-radius: 8px; padding: 11px 12px; width: 100%; min-width: 0; resize: vertical;
}
.form input:focus, .form textarea:focus { border-color: var(--cobalt); outline: none; box-shadow: 0 0 0 3px var(--cobalt-soft); }
.unit { display: flex; align-items: stretch; }
.unit input { border-radius: 8px 0 0 8px; }
.unit > span { display: flex; align-items: center; padding: 0 12px; border: 1px solid var(--rule); border-left: 0; border-radius: 0 8px 8px 0; font: 400 14px var(--mono); color: var(--lead); background: var(--sheet); white-space: nowrap; }
.hint { margin: 2px 0 0; font-size: 13px; color: var(--lead); }
.go { margin-top: 18px; align-self: flex-start; font: 600 15px/1 var(--display); letter-spacing: .06em; text-transform: uppercase; color: #fff; background: var(--cobalt); border: 0; border-radius: 8px; padding: 14px 20px; cursor: pointer; }
.go:hover { filter: brightness(1.08); }
.go:disabled { opacity: .55; cursor: progress; }
.err { color: var(--rust); font-size: 14px; margin: 10px 0 0; }

.swap { border-left: 1px solid var(--rule); padding: 28px; min-width: 0; display: flex; flex-direction: column; gap: 18px; }
.swap-empty { margin: auto; text-align: center; color: var(--lead); max-width: 30ch; }
.swap-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.swap-kind { margin: 0; font: 600 14px/1 var(--display); letter-spacing: .08em; text-transform: uppercase; color: var(--lead); }
.swap-clock { margin: 0; font: 400 13px var(--mono); color: var(--lead); }

/* The wire: one switch per real state of the swap. */
.wire { list-style: none; margin: 0; padding: 0; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; position: relative; }
.wire::before { content: ""; position: absolute; top: 9px; left: 9px; right: 9px; height: 2px; background: var(--rule); }
.wire::after { content: ""; position: absolute; top: 9px; left: 9px; height: 2px; width: calc((100% - 18px) * var(--done, 0)); background: var(--cobalt); transition: width .6s ease; }
.wire.live::after { background: linear-gradient(90deg, var(--cobalt), var(--amber)); }
.wire li { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: flex-start; gap: 8px; font-size: 12px; color: var(--lead); padding-right: 6px; }
.wire li:last-child { align-items: flex-end; text-align: right; padding-right: 0; }
.wire li::before { content: ""; width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--rule); background: var(--sheet); }
.wire li.on { color: var(--graphite); }
.wire li.on::before { border-color: var(--cobalt); background: var(--cobalt); }
.wire li.now::before { border-color: var(--cobalt); background: var(--sheet); box-shadow: 0 0 0 4px var(--cobalt-soft); animation: pulse 1.6s ease-in-out infinite; }
.wire li.bolt.on::before { border-color: var(--amber); background: var(--amber); }
.wire li.bad::before { border-color: var(--rust); background: var(--rust); }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px transparent; } }

.swap-body { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 520px) { .swap-body { grid-template-columns: 1fr; } }
.qr { width: 196px; height: 196px; padding: 10px; background: #fff; border-radius: 10px; border: 1px solid var(--rule); }
.qr svg { width: 100%; height: 100%; display: block; }
.facts { margin: 0; display: grid; gap: 12px; min-width: 0; }
.facts dt { font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--lead); }
.facts dd { margin: 2px 0 0; overflow-wrap: anywhere; }
.big { font: 600 28px/1.1 var(--display); }
.big small { font: 400 14px var(--body); color: var(--lead); }
.copy { display: flex; gap: 8px; align-items: flex-start; }
.copy code { flex: 1; min-width: 0; overflow-wrap: anywhere; background: var(--film); border: 1px solid var(--rule); border-radius: 6px; padding: 6px 8px; max-height: 5.4em; overflow: auto; }
.copy button { font: 600 12px var(--body); border: 1px solid var(--rule); background: var(--sheet); color: var(--graphite); border-radius: 6px; padding: 6px 9px; cursor: pointer; }
.note { margin: 0; font-size: 14px; color: var(--lead); }
.note.ok { color: var(--ok); }
.note.bad { color: var(--rust); }
.btn-link { font: 600 13px var(--body); color: var(--cobalt); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; }

.lnaddr { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; align-items: start; padding: 8px 0 56px; border-top: 1px solid var(--rule); }
.lnaddr h2, .ledger h2 { font: 600 clamp(22px, 3vw, 30px)/1.15 var(--display); margin: 28px 0 10px; }
.lnaddr p { color: var(--lead); }
.lnaddr .form { padding: 28px 0 0; }
.claimed { margin-top: 14px; padding: 14px; background: var(--cobalt-soft); border-radius: 10px; }
.claimed p { margin: 0 0 8px; color: var(--graphite); }
@media (max-width: 860px) { .lnaddr { grid-template-columns: 1fr; gap: 0; } }

.ledger { border-top: 1px solid var(--rule); padding-bottom: 56px; }
.table-wrap { overflow-x: auto; margin-top: 18px; border: 1px solid var(--rule); border-radius: 12px; background: var(--sheet); }
table { border-collapse: collapse; width: 100%; min-width: 640px; font-size: 14px; }
th, td { text-align: left; vertical-align: top; padding: 12px 16px; border-bottom: 1px solid var(--rule); }
thead th { font: 600 12px var(--body); text-transform: uppercase; letter-spacing: .08em; color: var(--lead); }
tbody th { font-weight: 600; width: 22%; }
tbody tr:last-child > * { border-bottom: 0; }
tr.us { background: var(--cobalt-soft); }
.fine { font-size: 14px; color: var(--lead); max-width: 70ch; }

.foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 22px clamp(16px, 4vw, 48px); border-top: 1px solid var(--rule); font-size: 13px; color: var(--lead); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}