/* S03 Binance Deposit — T2 howto skin. Not T1 cream serif. Not T3 full-sheet. Not Binance official. */
@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;600&display=swap");

:root {
  --ink: #0f172a;
  --paper: #f0f6ff;
  --pane: #ffffff;
  --line: #bfdbfe;
  --blue: #1d4ed8;
  --blue-2: #1e3a8a;
  --soft: #64748b;
  --rail: #dbeafe;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  display: grid;
  grid-template-columns: 15.5rem minmax(0, 1fr);
  min-height: 100vh;
}
img, svg, iframe, video { max-width: 100%; height: auto; }
a { color: var(--blue-2); text-underline-offset: 0.12em; }
a:hover { color: var(--blue); }

.rail-side {
  background: var(--blue-2);
  color: #e0e7ff;
  padding: 1.25rem 1rem 2rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}
.rail-logo {
  display: block;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
  margin-bottom: 1.15rem;
  line-height: 1.15;
}
.rail-logo .wm-bin {
  display: block;
  font-weight: 400;
  font-size: 0.95rem;
}
.rail-logo .wm-dep {
  display: block;
  font-weight: 700;
  font-size: 1.22rem;
  color: #fff;
}
.rail-logo small {
  display: block;
  font-weight: 400;
  opacity: 0.72;
  font-size: 0.7rem;
  margin-top: 0.35rem;
  letter-spacing: 0.04em;
}
.rail-nav { list-style: none; margin: 0; padding: 0; }
.rail-nav a {
  display: flex;
  align-items: center;
  min-height: 44px;
  color: #c7d2fe;
  text-decoration: none;
  padding: 0.45rem 0.55rem;
  border-left: 3px solid transparent;
  font-size: 0.92rem;
}
.rail-nav a:hover,
.rail-nav a.is-here {
  color: #fff;
  border-left-color: #93c5fd;
  background: rgba(255,255,255,0.06);
}

.rail-main {
  padding: 1.15rem 2rem 4rem;
  max-width: 48rem;
  min-width: 0;
}
.topbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.85rem;
}
.lang {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.15rem;
}
.lang a {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  min-height: 40px;
  padding: 0.2rem 0.35rem;
  text-decoration: none;
  color: var(--blue-2);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  border-radius: 4px;
}
.lang a:hover,
.lang a.is-here {
  background: var(--rail);
  color: var(--blue-2);
  font-weight: 600;
}

.dateline {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--soft);
  margin: 0 0 0.65rem;
}
.rail-kicker {
  font-family: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  color: var(--blue);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.35rem;
}
.rail-kicker b { font-weight: 700; color: var(--blue-2); }

h1, h2, h3 {
  font-family: "IBM Plex Sans", Arial, sans-serif;
  font-weight: 650;
  letter-spacing: -0.02em;
}
h1 { font-size: 1.7rem; margin: 0 0 0.55rem; line-height: 1.25; }
h1 .bin { font-weight: 500; }
h1 .dm { font-weight: 750; color: var(--blue-2); }
h2 { font-size: 1.2rem; margin: 1.8rem 0 0.45rem; }
h3 { font-size: 1.02rem; margin: 1.2rem 0 0.35rem; }
p { margin: 0 0 0.95rem; }

.byline {
  font-size: 0.88rem;
  color: var(--soft);
  margin: 0 0 1rem;
  padding: 0.55rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.byline strong { color: var(--ink); }

.rail-goal {
  background: var(--pane);
  border: 1px solid var(--line);
  padding: 0.9rem 1rem;
  margin: 0 0 1.1rem;
}
.rail-steps {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin: 0 0 1.2rem;
}
.rail-steps a {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  text-decoration: none;
  color: var(--blue-2);
  background: var(--rail);
  padding: 0.55rem 0.7rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
}
.rail-steps a:hover { background: #bfdbfe; }

.step {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0.7rem;
  margin: 0 0 1.15rem;
}
.step-n {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.92rem;
  font-weight: 600;
}
.step h3 { margin-top: 0.15rem; }

.exits {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0 0 1.6rem;
}
.exits a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.55rem 0.95rem;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  border-radius: 4px;
}
.exits a.ghost {
  background: var(--pane);
  color: var(--blue-2);
  border: 1px solid var(--line);
}
.exits a:hover { filter: brightness(1.05); }

.sources {
  background: var(--pane);
  border: 1px solid var(--line);
  padding: 0.95rem 1rem 1.05rem;
  margin: 0 0 1.5rem;
}
.sources h2 { margin-top: 0; }
.sources .lead { color: var(--soft); font-size: 0.92rem; }
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0.4rem 0 0.2rem; }
table {
  width: 100%;
  min-width: 28rem;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 0.35rem 0 0.6rem;
}
th, td { border: 1px solid var(--line); padding: 0.5rem 0.55rem; text-align: left; }
th { background: var(--rail); }
.ph { color: var(--soft); font-style: italic; }

.diag {
  background: var(--pane);
  border: 1px dashed var(--blue);
  padding: 0.8rem;
  margin: 0.8rem 0 1.1rem;
}
.diag svg { display: block; width: 100%; height: auto; }

.rail-fail {
  border-left: 4px solid var(--blue);
  padding: 0.15rem 0 0.15rem 0.8rem;
  margin: 0.7rem 0 1rem;
}
.teaser {
  background: var(--pane);
  border: 1px solid var(--line);
  padding: 0.85rem 1rem;
  margin: 0 0 0.85rem;
}
.teaser h2 { margin-top: 0; }

.rail-who {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.4rem 0;
  font-size: 0.9rem;
  color: var(--soft);
}
.ik-stub {
  width: 52px;
  height: 34px;
  background: var(--blue-2);
  color: #e0e7ff;
  position: relative;
  border-radius: 2px;
  display: grid;
  place-items: center;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  flex-shrink: 0;
  box-shadow: 0 1px 0 rgba(15,23,42,0.18);
}
.ik-stub::before,
.ik-stub::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  background: var(--paper);
}
.ik-stub::before { top: 5px; left: 6px; }
.ik-stub::after { bottom: 5px; right: 9px; }

.rail-foot {
  margin-top: 2.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  color: var(--soft);
}
.rail-foot a { color: var(--blue-2); }
.rail-foot nav { margin: 0.45rem 0; }
.rail-foot nav a {
  display: inline-block;
  min-height: 36px;
  padding: 0.35rem 0.1rem;
}

.first-screen { margin-bottom: 0.4rem; }

.named-rails { margin: 0 0 1rem; }
.named-rails > h2 { margin: 0 0 0.35rem; font-size: 1.05rem; }
.named-rails > .note { color: var(--soft); font-size: 0.86rem; margin: 0 0 0.55rem; }
.named-rails-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}
.named-rails article {
  background: var(--pane);
  border: 1px solid var(--line);
  padding: 0.65rem 0.75rem;
  min-width: 0;
}
.named-rails article h3 { margin: 0 0 0.2rem; font-size: 0.95rem; }
.named-rails .ui { font-size: 0.76rem; color: var(--soft); margin: 0 0 0.25rem; }
.named-rails .fig { font-size: 0.84rem; margin: 0 0 0.3rem; }
.named-rails .src { margin: 0; }
.named-rails .src a { font-size: 0.78rem; }


@media (max-width: 760px) {
  body { grid-template-columns: 1fr; }
  .rail-side {
    position: static;
    height: auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem 0.8rem;
    padding: 0.75rem 0.9rem 0.85rem;
  }
  .rail-logo { margin: 0 0.4rem 0 0; }
  .rail-nav {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    gap: 0.15rem;
  }
  .rail-nav li { list-style: none; }
  .rail-nav a {
    border-left: none;
    border-bottom: 3px solid transparent;
    padding: 0.55rem 0.7rem;
  }
  .rail-nav a:hover,
  .rail-nav a.is-here {
    border-left-color: transparent;
    border-bottom-color: #93c5fd;
  }
  .rail-main { padding: 1rem 1rem 3rem; }
  h1 { font-size: 1.42rem; }

  .first-screen h1 { font-size: 1.28rem; margin-bottom: 0.35rem; }
  .first-screen .byline { margin: 0 0 0.5rem; padding: 0.3rem 0; }
  .first-screen .rail-goal { padding: 0.5rem 0.65rem; margin-bottom: 0.55rem; }
  .first-screen .rail-goal p { margin: 0; font-size: 0.9rem; }
  .named-rails { margin-bottom: 0.55rem; }
  .named-rails > h2 { font-size: 0.95rem; }
  .named-rails > .note { font-size: 0.78rem; margin-bottom: 0.4rem; }
  .named-rails-grid { gap: 0.4rem; }
  .named-rails article { padding: 0.45rem 0.5rem; }
  .named-rails .ui { display: none; }
  .named-rails .fig { margin-bottom: 0.15rem; font-size: 0.78rem; }
  .first-screen .rail-steps { margin-bottom: 0.5rem; }
  .first-screen .exits { margin-bottom: 0.35rem; }
}