:root {
  --ink: #0f1b2d;
  --ink-2: #3b4a5f;
  --muted: #6b7a90;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-2: #f6f8fb;
  --navy: #0b1f3a;
  --accent: #0f9d6b;
  --accent-ink: #076b48;
  --l0: #8a94a6;
  --l1: #2f6fdf;
  --l2: #0e8f9a;
  --l3: #0f9d6b;
  --warn: #b45309;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); background: var(--bg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--l1); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }
.mono, code, pre { font-family: var(--mono); }
code { background: var(--bg-2); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; font-size: .9em; }
pre {
  background: #0d1726; color: #dbe7f7; border-radius: var(--radius); padding: 16px 18px;
  overflow: auto; font-size: 13.5px; line-height: 1.55; margin: 0;
}
pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }

header.site { background: var(--navy); color: #fff; }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 16px; }
.brand { color: #fff; font-weight: 700; letter-spacing: .2px; display: flex; align-items: center; gap: 10px; }
.brand:hover { text-decoration: none; }
.brand svg { width: 26px; height: 26px; }
nav.top { display: flex; gap: 22px; flex-wrap: wrap; }
nav.top a { color: #c9d6ea; font-size: 15px; }
nav.top a:hover, nav.top a[aria-current="page"] { color: #fff; text-decoration: none; }

.hero { background: linear-gradient(180deg, var(--navy) 0%, #12325c 100%); color: #fff; padding: 56px 0 64px; }
.hero h1 { font-size: clamp(30px, 4.6vw, 48px); line-height: 1.12; margin: 0 0 14px; letter-spacing: -.5px; }
.hero p.lead { font-size: 19px; color: #c9d6ea; max-width: 720px; margin: 0 0 26px; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block; border: 0; border-radius: 8px; padding: 11px 18px; font: inherit; font-weight: 600;
  cursor: pointer; background: var(--accent); color: #fff; text-decoration: none; line-height: 1.3;
}
.btn:hover { background: var(--accent-ink); text-decoration: none; }
.btn.ghost { background: transparent; color: #fff; box-shadow: inset 0 0 0 1.5px #5d7aa3; }
.btn.ghost:hover { background: rgba(255,255,255,.08); }
.btn.light { background: #fff; color: var(--ink); box-shadow: inset 0 0 0 1.5px var(--line); }
.btn.light:hover { background: var(--bg-2); }
.btn[disabled] { opacity: .6; cursor: wait; }

section { padding: 52px 0; }
section.alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 { font-size: 28px; line-height: 1.2; margin: 0 0 10px; letter-spacing: -.3px; }
h3 { font-size: 19px; margin: 24px 0 8px; }
.sub { color: var(--ink-2); margin: 0 0 24px; max-width: 760px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 860px) { .grid2, .grid3, .grid4 { grid-template-columns: 1fr; } nav.top { gap: 14px; } }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card h3 { margin-top: 0; }
.label { font-size: 12px; text-transform: uppercase; letter-spacing: .8px; color: var(--muted); font-weight: 700; margin: 0 0 8px; }

.lvl { display: inline-block; font-size: 12.5px; font-weight: 700; border-radius: 999px; padding: 2px 10px; color: #fff; white-space: nowrap; }
.lvl0 { background: var(--l0); } .lvl1 { background: var(--l1); } .lvl2 { background: var(--l2); } .lvl3 { background: var(--l3); }
.levels .card { border-top: 4px solid var(--l0); }
.levels .card.l1 { border-top-color: var(--l1); } .levels .card.l2 { border-top-color: var(--l2); } .levels .card.l3 { border-top-color: var(--l3); }

.search { display: flex; gap: 10px; max-width: 640px; }
.search input, .field input, .field select {
  flex: 1; font: inherit; padding: 11px 14px; border: 1.5px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); min-width: 0;
}
.search input:focus, .field input:focus { outline: none; border-color: var(--l1); }
.hero .search input { border-color: transparent; }
.answer { margin-top: 18px; max-width: 760px; }
.answer .card { color: var(--ink); }
.answer .meaning { font-size: 17px; margin: 8px 0 0; }
.answer .matches { margin: 10px 0 0; padding-left: 18px; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-weight: 600; font-size: 14px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.row .field { flex: 1; min-width: 200px; }
.msg { margin-top: 12px; padding: 12px 14px; border-radius: 8px; background: var(--bg-2); border: 1px solid var(--line); }
.msg.ok { background: #ecfdf5; border-color: #a7f3d0; }
.msg.err { background: #fef2f2; border-color: #fecaca; }
.msg:empty { display: none; }

table.reg { width: 100%; border-collapse: collapse; font-size: 14.5px; }
table.reg th { text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); border-bottom: 2px solid var(--line); padding: 8px 10px; }
table.reg td { border-bottom: 1px solid var(--line); padding: 12px 10px; vertical-align: top; }
table.reg td.meaning { color: var(--ink-2); max-width: 380px; }
table.reg tr:target { background: #fffbe6; }
@media (max-width: 860px) {
  table.reg thead { display: none; }
  table.reg tr { display: block; border-bottom: 1px solid var(--line); padding: 10px 0; }
  table.reg td { display: block; border: 0; padding: 3px 0; }
}
.filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 18px; }
.filters button { font: inherit; font-size: 14px; border: 1.5px solid var(--line); background: #fff; border-radius: 999px; padding: 5px 13px; cursor: pointer; }
.filters button[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: #fff; }

.stats { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 30px; color: #c9d6ea; font-size: 14px; }
.stats b { display: block; font-size: 26px; color: #fff; }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps > li { counter-increment: s; position: relative; padding-left: 46px; margin-bottom: 26px; }
.steps > li::before {
  content: counter(s); position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius: 50%;
  background: var(--navy); color: #fff; font-weight: 700; display: grid; place-items: center; font-size: 15px;
}
.price { font-size: 38px; font-weight: 800; margin: 6px 0 2px; }
.price small { font-size: 16px; font-weight: 500; color: var(--muted); }
.plan ul { padding-left: 18px; margin: 14px 0 20px; }
.plan.featured { border: 2px solid var(--accent); box-shadow: 0 6px 24px rgba(15, 157, 107, .12); }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.tabs button { font: inherit; font-size: 14px; border: 1.5px solid var(--line); background: #fff; border-radius: 7px; padding: 6px 12px; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--navy); color: #fff; border-color: var(--navy); }
.copy { position: relative; }
.copy button.cp {
  position: absolute; top: 8px; right: 8px; font: 12px/1 system-ui, sans-serif; padding: 6px 9px; border-radius: 6px;
  border: 1px solid #33496a; background: #18283f; color: #c9d6ea; cursor: pointer;
}
.toc { columns: 2; margin: 0 0 10px; padding-left: 18px; }
@media (max-width: 860px) { .toc { columns: 1; } }
.doc h2 { margin-top: 44px; padding-top: 10px; border-top: 1px solid var(--line); }
.doc h2:first-of-type { border-top: 0; margin-top: 0; }
.doc table { border-collapse: collapse; width: 100%; font-size: 14.5px; margin: 10px 0 18px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { background: var(--bg-2); }
.keybox { font-family: var(--mono); font-size: 15px; word-break: break-all; background: #0d1726; color: #7ff0c2; padding: 14px 16px; border-radius: 8px; }

footer.site { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
footer.site a { color: var(--ink-2); }