:root {
  --bg: #0b0e14;
  --bg2: #11151f;
  --card: #151a26;
  --line: #232a3b;
  --text: #e8ecf4;
  --muted: #93a0b8;
  --accent: #4f8cff;
  --accent2: #7c5cff;
  --ok: #3ecf8e;
  --warn: #f5b04a;
  --err: #f5646c;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, .mono { font-family: "Cascadia Code", Consolas, monospace; }
code { background: var(--bg2); border: 1px solid var(--line); border-radius: 4px; padding: 1px 6px; font-size: .9em; }
pre { background: var(--bg2); border: 1px solid var(--line); border-radius: 8px; padding: 14px; overflow-x: auto; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 18px; }
.page { padding: 36px 0 60px; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 10px; }
h2 { font-size: 24px; margin: 36px 0 12px; }
h3 { font-size: 18px; margin: 22px 0 8px; }
.lead { color: var(--muted); font-size: 17px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* header */
header.site {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11,14,20,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
header.site .wrap { display: flex; align-items: center; gap: 18px; height: 58px; }
.logo { font-weight: 800; font-size: 20px; letter-spacing: .3px; color: var(--text); }
.logo span { color: var(--accent); }
.logo:hover { text-decoration: none; }
nav.main { display: flex; gap: 4px; flex-wrap: wrap; margin-left: auto; }
nav.main a { color: var(--muted); padding: 8px 10px; border-radius: 8px; font-size: 14px; }
nav.main a:hover { color: var(--text); text-decoration: none; background: var(--bg2); }
.btn {
  display: inline-block; border: 1px solid var(--line); background: var(--card); color: var(--text);
  padding: 9px 18px; border-radius: 10px; cursor: pointer; font-size: 15px; text-decoration: none !important;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); border: none; color: #fff; font-weight: 600; }
.btn.danger { border-color: rgba(245,100,108,.5); color: var(--err); }
.btn.small { padding: 5px 12px; font-size: 13px; border-radius: 8px; }

/* cards, forms, tables */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; margin: 16px 0; }
.grid { display: grid; gap: 16px; }
.grid.c2 { grid-template-columns: 1fr 1fr; }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) { .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; } }
label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
input, select, textarea {
  width: 100%; background: var(--bg2); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font-size: 15px;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
.tblwrap { overflow-x: auto; }
table.r { width: 100%; border-collapse: collapse; font-size: 14px; }
table.r th, table.r td { border-bottom: 1px solid var(--line); padding: 9px 10px; text-align: left; vertical-align: top; }
table.r th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
table.r tr:last-child td { border-bottom: none; }

/* hero */
.hero { padding: 70px 0 40px; text-align: center; }
.hero h1 { font-size: 40px; }
.hero .lead { max-width: 640px; margin: 0 auto; }
.badge { display: inline-block; border: 1px solid var(--line); background: var(--bg2); color: var(--muted); border-radius: 99px; padding: 4px 14px; font-size: 13px; margin-bottom: 18px; }
.badge b { color: var(--ok); }

/* result / alerts */
.alert { border-radius: 10px; padding: 12px 14px; font-size: 14px; margin: 12px 0; }
.alert.ok { background: rgba(62,207,142,.1); border: 1px solid rgba(62,207,142,.35); color: var(--ok); }
.alert.err { background: rgba(245,100,108,.1); border: 1px solid rgba(245,100,108,.35); color: var(--err); }
.alert.info { background: rgba(79,140,255,.1); border: 1px solid rgba(79,140,255,.35); color: var(--accent); }
.tag { display: inline-block; border-radius: 6px; padding: 2px 8px; font-size: 12px; border: 1px solid var(--line); color: var(--muted); }
.tag.ok { color: var(--ok); border-color: rgba(62,207,142,.4); }
.tag.warn { color: var(--warn); border-color: rgba(245,176,74,.4); }
.tag.err { color: var(--err); border-color: rgba(245,100,108,.4); }
.rowline { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.copybtn { margin-left: 8px; }
kbd { background: var(--bg2); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; padding: 1px 7px; font-size: 12px; }

details { border: 1px solid var(--line); border-radius: 12px; background: var(--card); padding: 14px 16px; margin: 10px 0; }
details summary { cursor: pointer; font-weight: 600; }
details .a { margin-top: 10px; color: var(--text); }

/* footer */
footer.site { border-top: 1px solid var(--line); margin-top: 60px; padding: 26px 0; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
footer.site nav { display: flex; gap: 16px; flex-wrap: wrap; }
footer.site a { color: var(--muted); }

.tabs { display: flex; gap: 8px; margin: 14px 0; flex-wrap: wrap; }
.tabs button { background: var(--bg2); border: 1px solid var(--line); color: var(--muted); padding: 8px 16px; border-radius: 99px; cursor: pointer; font-size: 14px; }
.tabs button.on { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; border-color: transparent; }

/* плавающая кнопка Telegram (поддержка / оформление покупки) */
.tg-fab {
  position: fixed; right: 20px; bottom: 20px; z-index: 50;
  width: 56px; height: 56px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #2aabee, #229ED9);
  box-shadow: 0 6px 20px rgba(34,158,217,.45);
  text-decoration: none !important;
  transition: transform .15s ease, box-shadow .15s ease;
}
.tg-fab:hover { transform: scale(1.07); box-shadow: 0 8px 26px rgba(34,158,217,.6); }
.tg-fab svg { width: 28px; height: 28px; fill: #fff; }
.tg-fab .tg-tip {
  position: absolute; right: 66px; top: 50%; transform: translateY(-50%);
  background: var(--card); border: 1px solid var(--line); color: var(--text);
  font-size: 13px; white-space: nowrap; padding: 7px 12px; border-radius: 8px;
  opacity: 0; pointer-events: none; transition: opacity .15s ease;
}
.tg-fab:hover .tg-tip { opacity: 1; }
@media (max-width: 860px) {
  .tg-fab { width: 50px; height: 50px; right: 14px; bottom: 14px; }
  .tg-fab svg { width: 24px; height: 24px; }
  .tg-fab .tg-tip { display: none; }
}