/* Pearl Swap — "collision chamber": deep-space navy, two particle streams
 * (PRL cyan vs BTC magenta) colliding at the core. Distinct from escrow's
 * forest-green and covenant's midnight-violet. */
:root {
  --bg: #04060d;
  --bg2: #070b16;
  --panel: #0a1020;
  --panel2: #0d1428;
  --line: #1e3a5f;
  --ink: #eef6ff;
  --muted: #8ba3c7;
  --cyan: #4de3ff;
  --cyan-hi: #aef3ff;
  --cyan-dim: #1e6f86;
  --magenta: #ff4dd2;
  --magenta-hi: #ffb3ea;
  --green: #6fe3a5;
  --red: #ff6b6b;
  --amber: #ffc857;
  --code: #05080f;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}
/* particle-collision streams: two opposing streak fields + pulsing core */
.streams { position: fixed; inset: 0; z-index: -1; overflow: hidden; background:
  radial-gradient(900px 480px at 50% 0%, rgba(77,227,255,.10) 0%, transparent 60%),
  radial-gradient(700px 420px at 50% 110%, rgba(255,77,210,.07) 0%, transparent 60%),
  var(--bg); }
.streams i { position: absolute; inset: -40%; display: block; }
.streams .s1 { background: repeating-linear-gradient(115deg,
  transparent 0 46px, rgba(77,227,255,.055) 46px 48px, transparent 48px 96px);
  animation: drift1 26s linear infinite; }
.streams .s2 { background: repeating-linear-gradient(65deg,
  transparent 0 58px, rgba(255,77,210,.05) 58px 60px, transparent 60px 118px);
  animation: drift2 34s linear infinite; }
.streams .core { inset: auto; left: 50%; top: -140px; width: 560px; height: 340px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(255,255,255,.10), rgba(77,227,255,.05) 45%, transparent 70%);
  animation: pulse 5s ease-in-out infinite; }
@keyframes drift1 { from { transform: translateX(-4%); } to { transform: translateX(4%); } }
@keyframes drift2 { from { transform: translateX(4%); } to { transform: translateX(-4%); } }
@keyframes pulse { 0%,100% { opacity: .55; } 50% { opacity: 1; } }

.topbar {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
  padding: 1rem 1.5rem; border-bottom: 2px solid var(--cyan-dim);
  background: linear-gradient(180deg, rgba(13,20,40,.92), rgba(4,6,13,.92));
  position: sticky; top: 0; z-index: 10; backdrop-filter: blur(6px);
}
.brand { display: flex; gap: .8rem; align-items: center; }
.brand .seal { width: 42px; height: 42px; }
.brand h1 { margin: 0; font-size: 1.5rem; letter-spacing: .02em; color: var(--cyan-hi); }
.brand h1::after { content: " ⇄"; color: var(--magenta); }
.tagline { margin: 0; color: var(--muted); font-size: .9rem; }
.steps { display: flex; gap: .4rem; flex-wrap: wrap; }
.steps button {
  background: transparent; border: 1px solid var(--line); color: var(--muted);
  padding: .45rem .8rem; border-radius: 999px; cursor: pointer; font-size: .85rem;
}
.steps button.active { border-color: var(--cyan); color: var(--cyan-hi); background: #0e2233; }
.steps button.done { border-color: var(--green); color: var(--green); }
main { max-width: 1000px; margin: 0 auto; padding: 1.5rem; }
.limits {
  border: 1px solid var(--amber); border-radius: 12px; padding: 1rem 1.3rem;
  background: rgba(255,200,87,.06); margin-bottom: 1rem;
}
.limits h2 { margin: 0 0 .5rem; font-size: 1rem; color: var(--amber); }
.limits ul { margin: 0; padding-left: 1.2rem; color: var(--muted); font-size: .88rem; }
.limits li { margin: .25rem 0; }
.limits strong { color: var(--ink); }
.config-strip {
  display: flex; gap: 1rem; align-items: end; flex-wrap: wrap;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: .8rem 1.2rem; margin-bottom: 1rem;
}
.config-strip .wide { flex: 1; min-width: 240px; }
.panel { display: none; background: rgba(10,16,32,.92); border: 1px solid var(--line);
  border-radius: 14px; padding: 1.6rem; margin-bottom: 1.5rem;
  box-shadow: 0 8px 30px rgba(0,0,0,.45), inset 0 0 60px rgba(77,227,255,.03); }
.panel.active { display: block; }
.panel h2 { margin-top: 0; color: var(--cyan-hi); }
.panel h3 { color: var(--cyan); margin: 1.4rem 0 .6rem; }
.panel h4 { color: var(--magenta-hi); margin: 1rem 0 .4rem; font-size: .95rem; }
.lede { color: var(--muted); max-width: 72ch; }
.lede strong { color: var(--ink); }
code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; margin: 1rem 0; }
.form-grid .wide { grid-column: 1 / -1; }
label { display: flex; flex-direction: column; gap: .35rem; font-size: .9rem; color: var(--muted); }
label.confirm { flex-direction: row; align-items: flex-start; gap: .6rem; margin: .8rem 0;
  color: var(--amber); font-size: .9rem; }
label.confirm input { width: auto; margin-top: .2rem; accent-color: var(--amber); }
label.check { flex-direction: row; align-items: flex-start; gap: .6rem; border: 1px solid var(--line); border-radius: 8px; padding: .7rem .8rem; color: var(--ink); line-height: 1.5; cursor: pointer; }
label.check input { width: auto; margin-top: .15rem; }
label.check code { word-break: break-all; }
input, select, textarea {
  background: var(--code); border: 1px solid var(--line); color: var(--ink);
  border-radius: 8px; padding: .6rem .7rem; font-size: .95rem; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--cyan-dim); border-color: var(--cyan); }
input[readonly], textarea[readonly] { color: var(--muted); }
textarea { font-family: ui-monospace, Menlo, Consolas, monospace; resize: vertical; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.btn {
  border: 1px solid var(--cyan-dim); background: #0e2233; color: var(--cyan-hi);
  padding: .55rem 1.1rem; border-radius: 8px; cursor: pointer; font-size: .92rem;
}
.btn:hover:not(:disabled) { border-color: var(--cyan); background: #123048; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: linear-gradient(180deg, #5ee9ff, #1e9fc4); color: #03202b;
  border-color: var(--cyan-hi); font-weight: 600; }
.btn.primary:hover:not(:disabled) { background: linear-gradient(180deg, #7ff0ff, #27b3da); }
.btn.ghost { background: transparent; color: var(--muted); border-color: var(--line); }
.btn.ghost:hover:not(:disabled) { color: var(--ink); border-color: var(--cyan-dim); }
.error { background: #3a1d22; border: 1px solid #7a3a44; color: #f2b1a5;
  padding: .7rem 1rem; border-radius: 8px; margin: .8rem 0; }
.ok { background: #123a26; border: 1px solid #3f7a54; color: #a9e6b4;
  padding: .7rem 1rem; border-radius: 8px; margin: .8rem 0; }
.danger { background: rgba(255,107,107,.08); border: 1px solid #7a3a44; color: #ffb3ab;
  padding: .7rem 1rem; border-radius: 8px; margin: .8rem 0; font-size: .9rem; }
.warn { background: rgba(255,200,87,.08); border: 1px solid #8a6a30; color: var(--amber);
  padding: .7rem 1rem; border-radius: 8px; margin: .8rem 0; font-size: .9rem; }
.hint { color: var(--muted); font-size: .85rem; }
.addr-row { display: flex; gap: 1.2rem; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; }
.addr { font-size: 1.02rem; color: var(--cyan-hi); word-break: break-all; }
.addr.small { font-size: .8rem; }
.qr-wrap { margin: 1rem 0; }
.qr-wrap > div { display: inline-block; background: #fff; border-radius: 8px; padding: 6px; }
table.keys { width: 100%; border-collapse: collapse; margin: .8rem 0; font-size: .85rem; }
table.keys th, table.keys td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--line); }
table.keys th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; }
table.keys td code { font-size: .75rem; color: #cfe9ff; word-break: break-all; }
table.keys tr.selected td { background: #0e2233; }
.asm { display: block; background: var(--code); border: 1px solid var(--line); border-radius: 8px;
  padding: .7rem .9rem; font-size: .82rem; color: #cfe9ff; word-break: break-all; white-space: pre-wrap; }
details summary { cursor: pointer; color: var(--muted); font-size: .9rem; }
.summary { background: var(--code); border: 1px solid var(--line); border-radius: 10px;
  padding: 1rem 1.2rem; margin: .8rem 0; font-size: .88rem; }
.summary .krow { display: grid; grid-template-columns: 150px 1fr; gap: .8rem; padding: .2rem 0; }
.summary .krow dt { color: var(--muted); }
.summary .krow dd { margin: 0; word-break: break-all; }
.summary .krow dd code { font-size: .78rem; color: #cfe9ff; }
.summary .state-claimed { color: var(--green); font-weight: 700; }
.summary .state-refunded { color: var(--amber); font-weight: 700; }
.summary .state-locked { color: var(--cyan-hi); font-weight: 700; }
.summary .state-awaiting { color: var(--muted); font-weight: 700; }
.balance { font-size: 1rem; color: var(--cyan-hi); font-weight: 600; }
.claim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.claim-grid > div { background: var(--panel2); border: 1px solid var(--line);
  border-radius: 10px; padding: 1.1rem; }
.claim-grid > div:first-child { border-color: var(--cyan-dim); }
.claim-grid > div:last-child { border-color: #6b2f5e; }
.claim-grid h3 { margin-top: 0; }
.steps-list { background: var(--code); border: 1px solid var(--line); border-radius: 10px;
  padding: 1rem 1.2rem; margin: .8rem 0; font-size: .88rem; color: var(--muted); }
.steps-list p { margin: .45rem 0; }
.steps-list code { color: #cfe9ff; font-size: .78rem; word-break: break-all; }
footer { max-width: 1000px; margin: 0 auto; padding: 1.5rem; color: var(--muted);
  font-size: .85rem; text-align: center; }
footer a { color: var(--cyan-hi); }
footer .donate code { font-size: .75rem; color: var(--cyan-hi); word-break: break-all; }
@media (max-width: 760px) {
  .form-grid { grid-template-columns: 1fr; }
  .summary .krow { grid-template-columns: 1fr; }
  .claim-grid { grid-template-columns: 1fr; }
  .topbar { position: static; }
}

/* Keyboard focus: a visible ring in this app's accent on every interactive element (fleet focus-visible pass). */
:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }

/* Skip link: the first Tab stop on the page — parked off-screen until keyboard focus reveals it (fleet skip-link pass). */
.skip-link { position: absolute; left: 12px; top: -64px; z-index: 1000; padding: 10px 16px; border: 2px solid var(--amber); border-radius: 8px; background: #0b0e14; color: var(--amber); font-weight: 700; text-decoration: none; transition: top .15s ease; }
.skip-link:focus-visible { top: 12px; }
main:focus { outline: none; }

/* Reduced motion: when the OS asks for reduced motion, animations and transitions finish near-instantly and scrolling is not smoothed (fleet reduced-motion pass). Near-zero durations — not animation: none — so fade-ins still land on their end state and no content can be stranded invisible. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}