/* HeyLingo: спокойная рабочая вёрстка, один акцентный цвет, светлая и тёмная тема */
:root {
  --bg: #f6f7f9; --card: #ffffff; --ink: #14181f; --muted: #5d6673; --line: #dfe3e8;
  --accent: #0b8f7f; --accent-ink: #ffffff; --accent-soft: #e2f4f1; --mask: #b4232c; --code: #eef1f4;
  --warn-bg: #fff6e0; --warn-ink: #7a5300; --ok: #1d7a46;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "Courier New", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216; --card: #171b21; --ink: #e7eaee; --muted: #9aa4b1; --line: #2a3039;
    --accent: #2cc2ae; --accent-ink: #062621; --accent-soft: #123430; --mask: #ff7b84; --code: #1f252d;
    --warn-bg: #3a2c0c; --warn-ink: #f2c66b; --ok: #5cc98a;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 var(--sans); }
a { color: var(--accent); }
.wrap { max-width: 64rem; margin: 0 auto; padding: 0 max(16px, 4vw); }
header.top { border-bottom: 1px solid var(--line); background: var(--card); }
header.top .wrap { display: flex; align-items: center; gap: 1.5rem; height: 3.5rem; flex-wrap: wrap; }
.brand { font-weight: 800; font-size: 1.15rem; color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.brand span { color: var(--accent); }
nav { display: flex; gap: 1.1rem; margin-left: auto; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
nav a:hover, nav a.on { color: var(--ink); }
main { padding: 2.5rem 0 4rem; }
h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); line-height: 1.1; margin: 0 0 .75rem; letter-spacing: -.02em; }
h2 { font-size: 1.35rem; margin: 2.5rem 0 .75rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 .5rem; }
p { margin: 0 0 1rem; max-width: 65ch; }
.lead { font-size: 1.15rem; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 1.25rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.btn { display: inline-flex; align-items: center; gap: .4rem; background: var(--accent); color: var(--accent-ink);
  border: 0; border-radius: 8px; padding: .6rem 1rem; font: 600 .95rem var(--sans); cursor: pointer; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.danger { background: var(--mask); color: #fff; }
.btn:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
label { display: grid; gap: .3rem; font-size: .9rem; color: var(--muted); }
input, select, textarea { font: 1rem var(--sans); color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: .55rem .7rem; width: 100%; }
textarea { min-height: 6rem; resize: vertical; }
.row { display: flex; gap: .75rem; flex-wrap: wrap; align-items: end; }
.row > * { flex: 1 1 10rem; }
.row > .btn { flex: 0 0 auto; }
code, pre { font-family: var(--mono); font-size: .88rem; }
code { background: var(--code); padding: .1em .35em; border-radius: 4px; }
pre { background: var(--code); padding: 1rem; border-radius: 10px; overflow-x: auto; margin: 0 0 1rem; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
.scroll { overflow-x: auto; }
th, td { text-align: left; padding: .55rem .6rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }
.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
.muted { color: var(--muted); }
.pill { display: inline-block; font-size: .75rem; font-weight: 600; padding: .1rem .5rem; border-radius: 99px;
  background: var(--accent-soft); color: var(--accent); }
.pill.off { background: var(--code); color: var(--muted); }
.notice { background: var(--warn-bg); color: var(--warn-ink); border-radius: 10px; padding: .9rem 1rem; margin: 0 0 1rem; }
.secret { font: 600 1rem var(--mono); background: var(--code); padding: .7rem .9rem; border-radius: 8px;
  word-break: break-all; user-select: all; }
.stat { display: grid; gap: .1rem; }
.stat b { font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: .85rem; }
.bars { display: flex; align-items: end; gap: 4px; height: 7rem; padding-top: .5rem; }
.bars div { flex: 1; background: var(--accent); border-radius: 3px 3px 0 0; min-height: 2px; position: relative; }
.bars div:hover::after { content: attr(data-tip); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: var(--bg); font-size: .75rem; padding: .15rem .4rem; border-radius: 4px; white-space: nowrap; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; padding: 1.5rem 0; }
@media (max-width: 40rem) { nav { margin-left: 0; } header.top .wrap { height: auto; padding-block: .6rem; } }