/* Sourced — modern dev tool. Light = ink on paper, dark = Vercel-black. */
:root, :root[data-theme="light"] {
  color-scheme: light;
  --paper: #ffffff;
  --ink: #171717;
  --dim: #666670;
  --faint: #9797a1;
  --line: #e5e5ea;
  --wash: #fafafa;
  --signal: #d4111e;
  --ok: #0f7b41;
  --code-str: #29426b;
  --shadow: 0 1px 2px rgba(0,0,0,.04);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0a0a0a;
  --ink: #ededed;
  --dim: #a1a1aa;
  --faint: #63636b;
  --line: #262629;
  --wash: #141416;
  --signal: #f04d58;
  --ok: #3dd68c;
  --code-str: #8cb4ff;
  --shadow: none;
}
:root {
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, "Segoe UI", Inter, Roboto, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.65;
  font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
  transition: background-color .15s ease, color .15s ease;
}
::selection { background: rgba(212, 17, 30, .18); }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* header */
.top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 0; border-bottom: 1px solid var(--line);
}
.brand { font-family: var(--mono); font-size: 14px; letter-spacing: .22em; font-weight: 700; }
.brand .dot { color: var(--signal); }
.brand a { color: inherit; text-decoration: none; }
.topright { display: flex; align-items: center; gap: 18px; }
.nav { display: flex; gap: 18px; font-family: var(--mono); font-size: 11px; letter-spacing: .14em; }
.nav a { color: var(--dim); text-decoration: none; padding-bottom: 3px; }
.nav a:hover { color: var(--ink); }
.nav a.here { color: var(--ink); border-bottom: 2px solid var(--signal); }

/* theme toggle */
.mode {
  width: 32px; height: 32px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--line); background: var(--paper); color: var(--dim);
  display: inline-flex; align-items: center; justify-content: center; padding: 0;
}
.mode:hover { color: var(--ink); border-color: var(--dim); }
.mode svg { width: 15px; height: 15px; }
.mode .sun { display: none; }
:root[data-theme="dark"] .mode .sun { display: block; }
:root[data-theme="dark"] .mode .moon { display: none; }

/* hero */
.hero { padding: 52px 0 36px; }
.hero h1 { font-size: clamp(28px, 4.6vw, 40px); line-height: 1.15; letter-spacing: -.02em; font-weight: 750; }
.hero .sub { margin-top: 14px; color: var(--dim); max-width: 72ch; }
.kicker {
  font-family: var(--mono); font-size: 11px; letter-spacing: .24em;
  color: var(--faint); text-transform: uppercase; margin-bottom: 14px;
}
.kicker::before { content: "\25CF  "; color: var(--signal); }
.meta {
  margin-top: 16px; font-family: var(--mono); font-size: 12px; color: var(--dim);
  display: flex; gap: 8px 22px; flex-wrap: wrap;
}
.meta strong { color: var(--ink); font-weight: 600; }

/* live pulse */
.live {
  margin-top: 18px; font-family: var(--mono); font-size: 12px; color: var(--dim);
  display: flex; align-items: baseline; gap: 9px; max-width: 100%;
}
.livedot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--signal);
  flex: none; align-self: center; animation: livepulse 1.6s ease-in-out infinite;
}
@keyframes livepulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(212, 17, 30, .35); }
  50% { opacity: .55; box-shadow: 0 0 0 5px rgba(212, 17, 30, 0); }
}

/* table of contents */
.toc {
  border: 1px solid var(--line); background: var(--wash); border-radius: 8px;
  padding: 16px 20px; font-family: var(--mono); font-size: 12.5px;
  columns: 2; column-gap: 32px;
}
.toc a { display: block; color: var(--dim); text-decoration: none; padding: 3px 0; }
.toc a:hover { color: var(--ink); }
.toc a::before { content: "\2192  "; color: var(--faint); }
@media (max-width: 640px) { .toc { columns: 1; } }

/* sections */
section { padding: 36px 0 8px; border-top: 1px solid var(--line); margin-top: 28px; }
section:first-of-type { border-top: 0; margin-top: 0; }
h2 { font-size: 21px; font-weight: 700; letter-spacing: -.01em; margin-bottom: 6px; }
h2 .no { color: var(--faint); font-family: var(--mono); font-size: 15px; font-weight: 400; margin-right: 10px; }
h3 { font-size: 16px; font-weight: 650; margin: 26px 0 8px; }
p { max-width: 76ch; }
p + p { margin-top: 10px; }
ul, ol { padding-left: 22px; max-width: 74ch; }
li { margin: 5px 0; }
.muted { color: var(--dim); }
.small { font-size: 13.5px; }
a { color: var(--ink); text-decoration-color: var(--faint); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--signal); }

/* cards & tables */
.card { border: 1px solid var(--line); border-radius: 8px; padding: 16px 20px; background: var(--paper); box-shadow: var(--shadow); }
.card.accent { border-left: 3px solid var(--signal); }
.tablebox { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; margin: 14px 0; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 14px; border-top: 1px solid var(--line); vertical-align: top; }
thead th, tr:first-child th { border-top: 0; }
th { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; color: var(--faint); text-transform: uppercase; background: var(--wash); font-weight: 600; }
td:first-child { font-family: var(--mono); font-size: 13px; white-space: nowrap; }
td .req { color: var(--signal); font-size: 11px; font-family: var(--mono); }
td .opt { color: var(--faint); font-size: 11px; font-family: var(--mono); }

/* code */
pre {
  background: var(--wash); border: 1px solid var(--line); border-radius: 8px;
  padding: 16px 18px; overflow-x: auto; font-family: var(--mono);
  font-size: 13px; line-height: 1.6; margin: 14px 0; position: relative;
}
code { font-family: var(--mono); font-size: .9em; background: var(--wash); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
pre code { background: none; border: 0; padding: 0; }
pre .c { color: var(--faint); } pre .k { font-weight: 700; } pre .s { color: var(--code-str); }
.copy {
  position: absolute; top: 8px; right: 8px; cursor: pointer;
  border: 1px solid var(--line); background: var(--paper); color: var(--dim);
  border-radius: 6px; font-family: var(--mono); font-size: 10px; letter-spacing: .1em;
  padding: 4px 9px; opacity: 0; transition: opacity .12s ease;
}
pre:hover .copy { opacity: 1; }
.copy:hover { color: var(--ink); border-color: var(--dim); }
.copy.done { color: var(--ok); border-color: var(--ok); opacity: 1; }

/* code tabs */
.tabs { display: flex; gap: 2px; margin: 18px 0 0; border: 1px solid var(--line); border-bottom: 0; border-radius: 8px 8px 0 0; background: var(--wash); padding: 6px 6px 0; width: fit-content; }
.tabs button {
  border: 0; background: transparent; color: var(--dim); cursor: pointer;
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em; font-weight: 600;
  padding: 7px 16px; border-radius: 6px 6px 0 0;
}
.tabs button.on { background: var(--paper); color: var(--ink); border: 1px solid var(--line); border-bottom-color: var(--paper); margin-bottom: -1px; }
.tabpanes > pre { margin-top: 0; border-top-left-radius: 0; }
.tabpanes > pre:not(.on) { display: none; }

/* interactive */
textarea, input[type=text] {
  width: 100%; background: var(--paper); color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px; padding: 13px 15px;
  font-family: var(--mono); font-size: 13px; line-height: 1.6; resize: vertical;
}
textarea:focus, input:focus { outline: none; border-color: var(--dim); }
.btn {
  display: inline-block; background: var(--ink); color: var(--paper); border: 1px solid var(--ink); cursor: pointer;
  font-family: var(--mono); font-size: 12px; letter-spacing: .16em; font-weight: 700;
  padding: 12px 24px; border-radius: 7px; text-decoration: none;
}
.btn:hover { opacity: .85; }
.btn.ghost { background: var(--paper); border: 1px solid var(--line); color: var(--ink); }
.btn.ghost:hover { opacity: 1; border-color: var(--dim); }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin: 14px 0; }

/* verdict rows */
.v { border-top: 1px solid var(--line); padding: 12px 2px; }
.v:first-child { border-top: 0; }
.v .t { font-weight: 600; font-size: 14.5px; }
.v .m { font-family: var(--mono); font-size: 12px; color: var(--dim); margin-top: 3px; }

/* badges */
.badge {
  display: inline-block; font-family: var(--mono); font-size: 10px; letter-spacing: .12em;
  padding: 2px 8px; border-radius: 5px; border: 1px solid var(--line); color: var(--dim);
  margin-left: 8px; vertical-align: 2px; font-weight: 700;
}
.badge.confirmed { border-color: var(--signal); color: var(--signal); }
.badge.breaking { background: var(--signal); border-color: var(--signal); color: #fff; }
.badge.developing { border-color: var(--ink); color: var(--ink); }
.badge.ok { border-color: var(--ok); color: var(--ok); }
.badge.fail { background: var(--signal); border-color: var(--signal); color: #fff; }

/* callouts */
.note {
  border-left: 3px solid var(--ink); background: var(--wash);
  padding: 12px 16px; border-radius: 0 8px 8px 0; margin: 14px 0; font-size: 14px; max-width: 76ch;
}
.note.warn { border-left-color: var(--signal); }

/* footer */
footer {
  border-top: 1px solid var(--line); margin-top: 48px; padding: 24px 0 44px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; color: var(--faint);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
footer a { color: var(--dim); text-decoration: none; }
footer a:hover { color: var(--ink); }

@media (max-width: 640px) {
  .hero { padding: 36px 0 28px; }
  body { font-size: 15px; }
  .topright { gap: 12px; }
  .nav { gap: 12px; }
}