/* R-POW Gateway: indigo ink on cool paper, amber for Lightning, green for the node. System fonts (strict CSP). */
:root {
  --paper: #eef1f6; --sheet: #fff; --ink: #18213a; --muted: #5b6480; --line: #d3d9e6;
  --volt: #e8a317; --volt-soft: #fbefd2; --node: #1f7a55; --ok: #217a4b; --ok-soft: #dcf0e4; --bad: #c03a31; --bad-soft: #f8e0dd; --focus: #2c5bd6;
  --display: "Avenir Next", "Segoe UI Variable Display", "Helvetica Neue", system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) { :root {
  --paper: #0f1424; --sheet: #171e33; --ink: #e6e9f2; --muted: #9aa3bb; --line: #2c3654;
  --volt: #f2b737; --volt-soft: #3a2e12; --node: #4fc28d; --ok: #5cc48c; --ok-soft: #173326; --bad: #ef7d74; --bad-soft: #3d1d1b; --focus: #7d9ef2; color-scheme: dark; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.55 var(--body); min-height: 100vh; display: flex; flex-direction: column; }
[hidden] { display: none !important; }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; margin: 0; text-wrap: balance; }
h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: 1.25rem; font-weight: 700; }
h3 { font-size: 1rem; }
p { margin: 0; }
.top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 20px; background: var(--sheet); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font: 800 1.15rem var(--display); color: var(--ink); text-decoration: none; }
.brand .thin { font-weight: 500; color: var(--muted); }
.mark { width: 26px; height: 26px; border-radius: 7px; background: linear-gradient(135deg, var(--volt), #c47c06); position: relative; }
.mark::after { content: ""; position: absolute; inset: 6px 9px; background: var(--sheet); clip-path: polygon(60% 0, 10% 58%, 45% 58%, 30% 100%, 90% 38%, 55% 38%); }
.who { display: flex; gap: 12px; align-items: center; color: var(--muted); }
.wrap { width: 100%; max-width: 1040px; margin: 0 auto; padding-inline: 20px; padding-block: 36px 48px; flex: 1; }
#v-auth { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 32px; align-items: start; }
@media (max-width: 760px) { #v-auth { grid-template-columns: 1fr; } }
.intro { display: grid; gap: 16px; }
.intro > p { color: var(--muted); font-size: 1.08rem; max-width: 52ch; }
.how { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 10px; counter-reset: s; }
.how li { counter-increment: s; display: grid; grid-template-columns: 34px 1fr; column-gap: 12px; align-items: center; }
.how li::before { content: counter(s); grid-row: span 2; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--volt-soft); color: var(--ink); font-weight: 700; }
.how span { color: var(--muted); font-size: 0.92rem; }
.card { background: var(--sheet); border: 1px solid var(--line); border-radius: 14px; padding: 20px; display: grid; gap: 12px; align-content: start; min-width: 0; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); }
.tabs button { flex: 1; border: 0; background: none; padding: 10px; font: 600 0.95rem var(--body); color: var(--muted); cursor: pointer; border-bottom: 3px solid transparent; }
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--volt); }
form { display: grid; gap: 8px; }
label { font-weight: 600; font-size: 0.9rem; }
input, textarea { width: 100%; font: inherit; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; min-width: 0; }
textarea { font: 0.78rem/1.5 var(--mono); resize: none; word-break: break-all; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
button { font: 600 0.95rem var(--body); border-radius: 9px; padding: 10px 16px; cursor: pointer; border: 1px solid transparent; }
button:disabled { opacity: .55; cursor: default; }
.primary { background: var(--ink); color: var(--paper); }
.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.danger { background: var(--bad-soft); color: var(--bad); border-color: var(--bad); white-space: nowrap; }
.link { background: none; border: 0; padding: 0; color: var(--focus); text-decoration: underline; }
.hint, .small { font-size: 0.85rem; color: var(--muted); }
.muted { color: var(--muted); }
.err { color: var(--bad); font-size: 0.92rem; min-height: 1.2em; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row input { flex: 1 1 220px; }
.between { justify-content: space-between; }
.status { margin-bottom: 18px; padding: 12px 16px; border-radius: 12px; font-weight: 600; }
.status.ok { background: var(--ok-soft); color: var(--ok); }
.status.wait { background: var(--volt-soft); color: var(--ink); }
.status.bad { background: var(--bad-soft); color: var(--bad); }
.payrow { display: flex; gap: 20px; flex-wrap: wrap; align-items: flex-start; }
#qr { background: #fff; border-radius: 12px; padding: 8px; max-width: 100%; height: auto; }
.paybox { flex: 1 1 260px; display: grid; gap: 8px; min-width: 0; }
.waiting { display: flex; gap: 8px; align-items: center; color: var(--muted); }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--volt); animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) { .dot { animation: none; } }
.grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr); gap: 18px; }
.grid .span { grid-column: 1 / -1; }
@media (max-width: 760px) { .grid { grid-template-columns: 1fr; } }
.files { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.files button { width: 100%; text-align: left; background: var(--paper); border: 1px solid var(--line); color: var(--ink); display: grid; gap: 2px; }
.files button[aria-current="true"] { border-color: var(--ink); }
.files small { color: var(--muted); font-weight: 500; }
.doc { margin: 0; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 14px; font: 0.88rem/1.6 var(--mono); white-space: pre-wrap; word-break: break-word; min-height: 220px; overflow: auto; }
.restricted { border-top: 1px dashed var(--line); padding-top: 12px; display: grid; gap: 8px; }
.foot { text-align: center; color: var(--muted); font-size: 0.82rem; padding: 18px 20px 28px; }
.brand { white-space: nowrap; }
.who span { max-width: 14ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (max-width: 520px) { .brand .thin { display: none; } .top { padding-inline: 16px; } .wrap { padding-inline: 16px; } }