:root {
  --bg: #0b0e14;
  --panel: #121826;
  --line: #223052;
  --text: #e8eefc;
  --muted: #a4b0c7;
  --accent: #7dd3fc;
  --good: #6ee7b7;
  --bad: #fca5a5;
  --warn: #fcd34d;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(125, 211, 252, 0.10), transparent 60%),
    radial-gradient(900px 500px at 10% 0%, rgba(110, 231, 183, 0.07), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.mono { font-family: var(--mono); }
.small { font-size: 0.85em; word-break: break-all; }
.muted { color: var(--muted); }
a { color: var(--accent); }
code { background: rgba(125, 211, 252, 0.10); padding: 0.1em 0.4em; border-radius: 6px; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; gap: 20px; padding: 12px 20px; }
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.brand span { color: var(--accent); font-size: 0.8em; letter-spacing: 0.1em; }
.nav { display: flex; gap: 14px; margin-left: auto; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.9rem; }
.nav a:hover { color: var(--accent); }
.conn { font-size: 0.8rem; color: var(--warn); white-space: nowrap; }
.conn.ok { color: var(--good); }

.hero { padding: 56px 0 28px; text-align: center; }
.hero h1 {
  font-size: 2.6rem; margin: 0 0 12px;
  background: linear-gradient(100deg, #e8eefc, #7dd3fc 60%, #6ee7b7);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { color: var(--muted); font-size: 1.1rem; max-width: 640px; margin: 0 auto; }
.hint {
  margin: 22px auto 0; max-width: 640px; text-align: left;
  background: rgba(252, 211, 77, 0.08); border: 1px solid rgba(252, 211, 77, 0.35);
  border-radius: 12px; padding: 12px 16px; font-size: 0.92rem; color: var(--text);
}
.hint.ok { background: rgba(110, 231, 183, 0.08); border-color: rgba(110, 231, 183, 0.35); }

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent), var(--panel);
  border: 1px solid var(--line); border-radius: 16px;
  padding: 24px; margin: 20px 0;
}
.card h2 { margin: 0 0 14px; font-size: 1.3rem; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.card-head h2 { margin: 0; }
.pill {
  font-size: 0.78rem; color: var(--accent);
  border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px;
  white-space: nowrap;
}

.field { display: block; margin: 14px 0; }
.label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
.input, select.input {
  width: 100%; background: #0d1320; border: 1px solid var(--line);
  color: var(--text); border-radius: 10px; padding: 11px 14px; font-size: 1rem;
}
.input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(125, 211, 252, 0.15); }
.input.invalid { border-color: var(--bad); }
.field-note { display: block; font-size: 0.8rem; color: var(--muted); margin-top: 5px; }
.field-note.bad { color: var(--bad); }
.field-note.good { color: var(--good); }

.btn {
  background: transparent; color: var(--text);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 18px; font-size: 0.95rem; cursor: pointer;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary {
  background: linear-gradient(100deg, #38bdf8, #34d399);
  border: none; color: #06121f; font-weight: 700; margin-top: 6px;
}
.btn.primary:hover { filter: brightness(1.1); color: #06121f; }
.btn:disabled { opacity: 0.5; cursor: wait; }

.err {
  color: var(--bad); background: rgba(252, 165, 165, 0.08);
  border: 1px solid rgba(252, 165, 165, 0.3); border-radius: 10px;
  padding: 10px 14px; margin-top: 12px; font-size: 0.9rem;
}
.result {
  margin-top: 16px; border: 1px solid var(--line); border-radius: 12px;
  padding: 16px; background: rgba(125, 211, 252, 0.05);
}
.result.success { border-color: rgba(110, 231, 183, 0.5); background: rgba(110, 231, 183, 0.06); }
.result.failure { border-color: rgba(252, 165, 165, 0.5); background: rgba(252, 165, 165, 0.06); }
.result h3 { margin: 0 0 8px; font-size: 1.05rem; }
.result p { margin: 0 0 10px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat {
  background: rgba(125, 211, 252, 0.05); border: 1px solid var(--line);
  border-radius: 10px; padding: 10px 14px;
  display: flex; flex-direction: column; gap: 2px;
}
.stat .label { font-size: 0.75rem; color: var(--muted); margin: 0; }
.stat .value { font-size: 1.05rem; font-weight: 600; }

.steps { margin: 0; padding-left: 22px; }
.steps li { margin: 8px 0; }
.code {
  background: #0d1320; border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; overflow-x: auto; font-family: var(--mono); font-size: 0.85rem;
}

.donate-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.donate-row code { flex: 1; min-width: 260px; }

.footer { border-top: 1px solid var(--line); margin-top: 40px; padding: 20px 0 32px; }
.footer-inner { display: flex; gap: 18px; flex-wrap: wrap; font-size: 0.85rem; color: var(--muted); }

@media (max-width: 640px) {
  .hero h1 { font-size: 2rem; }
  .topbar-inner { flex-wrap: wrap; }
  .nav { margin-left: 0; }
}

/* Keyboard focus: a visible ring in this app's accent on every interactive element (fleet focus-visible pass). */
:focus-visible { outline: 2px solid var(--accent); 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(--accent); border-radius: 8px; background: #0b0e14; color: var(--accent); 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; }
}

/* Touch targets (fleet WCAG 2.5.8 pass): standalone nav links measured 22-24px tall in the fleet probe — pad them past the 24px minimum. */
.nav a { padding: 4px 6px; }