/* ==========================================================================
   Nelaviro — публичный сайт
   Направление: «сайт-инструмент». Спокойная инженерная подача:
   плотная сетка, моноширинные детали, схема пути подключения.
   Без фреймворков, без внешних ресурсов, без JavaScript.
   ========================================================================== */

:root {
  --paper: #0b111d;
  --surface: #111927;
  --surface-2: #0e1624;

  --ink: #f4f8ff;
  --ink-2: #c5d1e1;
  --muted: #8fa0b8;
  --faint: #718198;

  --line: #1e2a3e;
  --line-2: #182337;
  --line-3: #30415e;

  --accent: #7fe8ff;
  --accent-deep: #b9f4ff;
  --accent-mid: #57a6ff;
  --accent-wash: rgba(87, 166, 255, 0.1);

  --ok: #65d89a;
  --warn: #ffb86b;

  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --r-sm: 8px;
  --r: 12px;
  --r-lg: 18px;
  --maxw: 70rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(75% 55% at 12% 8%, rgba(87, 166, 255, 0.13), transparent 72%),
    radial-gradient(60% 60% at 88% 20%, rgba(127, 232, 255, 0.07), transparent 72%),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  margin: 0 0 0.5em;
  color: var(--ink);
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: -0.025em;
}
h1 { font-size: clamp(2.1rem, 1.35rem + 3.1vw, 3.4rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(1.35rem, 1.15rem + 0.8vw, 1.7rem); }
h3 { font-size: 1.05rem; letter-spacing: -0.012em; }

p { margin: 0 0 1rem; }
p:last-child, ul:last-child, ol:last-child { margin-bottom: 0; }

a { color: var(--accent); text-underline-offset: 0.22em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-deep); }
strong { font-weight: 650; color: var(--ink); }
img, svg { max-width: 100%; }

/* ------------------------------------------------------- доступность --- */

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 30;
  background: var(--surface); color: var(--ink);
  padding: 0.85rem 1.25rem; border: 2px solid var(--accent);
  border-radius: 0 0 var(--r-sm) 0; font-weight: 600; text-decoration: none;
}
.skip-link:focus { left: 0; }
:focus-visible { outline: 3px solid var(--accent-mid); outline-offset: 3px; border-radius: 5px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* --------------------------------------------------------- раскладка --- */

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }
.page { padding: 2rem 0 3rem; }
.stack > * + * { margin-top: 3rem; }

/* ------------------------------------------------------------- шапка --- */

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(11, 17, 29, 0.88);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  backdrop-filter: saturate(150%) blur(10px);
}
.site-header > .container {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: 0.4rem 1.75rem; padding-top: 0.8rem; padding-bottom: 0.8rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  color: var(--ink); text-decoration: none; font-weight: 700; font-size: 1rem;
}
.brand:hover { color: var(--accent-deep); }
.brand img { width: 28px; height: 28px; flex: none; }
.brand span { letter-spacing: -0.01em; }

.site-nav { margin-left: auto; }
.site-nav ul {
  display: flex; flex-wrap: wrap; gap: 0.2rem 1.35rem;
  list-style: none; margin: 0; padding: 0; font-size: 0.95rem;
}
.site-nav a { position: relative; display: inline-block; padding: 0.3rem 0; color: var(--muted); text-decoration: none; }
.site-nav a:hover { color: var(--accent-deep); }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 650; }
.site-nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0.05rem;
  height: 2px; border-radius: 2px; background: var(--accent-mid);
}

/* ------------------------------------------------------- первый экран --- */

.hero {
  position: relative; overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 2.25rem 1.5rem;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px);
  background-size: 3rem 3rem;
  -webkit-mask-image: radial-gradient(70% 60% at 78% 10%, #000 0%, transparent 72%);
  mask-image: radial-gradient(70% 60% at 78% 10%, #000 0%, transparent 72%);
}
.hero > * { position: relative; }

.tagline {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.02em;
  color: var(--muted); background: var(--surface-2);
  border: 1px solid var(--line); border-radius: 999px; padding: 0.35rem 0.85rem;
  margin-bottom: 1.4rem;
}
.tagline .dot {
  width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--ok);
  box-shadow: 0 0 0 3px rgba(28, 127, 75, 0.14); flex: none;
}

.hero h1 { max-width: 17ch; }
.hero .lead { color: var(--ink-2); font-size: 1.12rem; max-width: 52ch; margin-top: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 0.85rem 1.4rem; margin-top: 1.9rem; }

.route {
  margin-top: 2.5rem; padding-top: 1.9rem; border-top: 1px solid var(--line-2);
  display: grid; grid-template-columns: 1fr; gap: 1rem;
}
.route-title {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--faint); margin: 0;
}
.route-steps { display: grid; grid-template-columns: 1fr; gap: 0.9rem; margin: 0; padding: 0; list-style: none; }
.route-step {
  display: flex; align-items: flex-start; gap: 0.85rem;
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: var(--r); padding: 0.95rem 1.05rem;
}
.route-step .idx {
  font-family: var(--mono); font-size: 0.72rem; color: var(--accent);
  border: 1px solid var(--line-3); border-radius: 6px;
  padding: 0.1rem 0.4rem; flex: none; margin-top: 0.15rem;
}
.route-step b { display: block; font-weight: 650; font-size: 0.98rem; }
.route-step span { display: block; color: var(--muted); font-size: 0.9rem; line-height: 1.5; }

/* ------------------------------------------------------------ кнопки --- */

.button {
  display: inline-block; background: rgba(127, 232, 255, 0.06); color: var(--accent);
  border: 1px solid rgba(127, 232, 255, 0.55); border-radius: var(--r-sm);
  padding: 0.82rem 1.55rem; font-weight: 650; font-size: 1rem; text-decoration: none;
  transition: background-color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}
.button:hover { background: rgba(127, 232, 255, 0.12); border-color: var(--accent); color: var(--accent-deep); transform: translateY(-1px); }
.button-quiet { background: var(--surface); color: var(--ink); border: 1px solid var(--line-3); }
.button-quiet:hover { background: var(--surface-2); color: var(--accent-deep); border-color: var(--accent-mid); }
.link-quiet { color: var(--accent); font-weight: 550; }

/* --------------------------------------------------------- заголовки --- */

.sec-head { margin-bottom: 1.5rem; }
.sec-label {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 0.7rem;
}
.sec-head p { color: var(--muted); max-width: 58ch; margin: 0.4rem 0 0; }

/* ---------------------------------------------------------- карточки --- */

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1rem; margin: 0; padding: 0; list-style: none; }
.tile {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); padding: 1.5rem 1.4rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}
.tile:hover { border-color: var(--line-3); box-shadow: 0 16px 34px -26px rgba(16, 26, 30, 0.55); transform: translateY(-2px); }
.tile-mark { width: 28px; height: 28px; color: var(--accent-mid); margin-bottom: 1rem; }
.tile h3 { margin-bottom: 0.35rem; }
.tile p { color: var(--muted); font-size: 0.98rem; margin: 0; }

/* ------------------------------------------------------ полоса фактов --- */

.facts {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r); overflow: hidden; margin: 0; padding: 0;
}
.facts > div { padding: 1.25rem 1.4rem; border-top: 1px solid var(--line-2); }
.facts > div:first-child { border-top: none; }
.facts dt { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.13em; text-transform: uppercase; color: var(--faint); }
.facts dd { margin: 0.45rem 0 0; font-weight: 650; font-size: 1.02rem; color: var(--ink); }
.facts dd small { display: block; font-weight: 400; font-size: 0.88rem; color: var(--muted); margin-top: 0.2rem; }

/* --------------------------------------------------------- состояние --- */

.status {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.7rem 1.25rem;
  background: var(--surface); border: 1px solid var(--line);
  border-left: 3px solid var(--ok); border-radius: var(--r); padding: 1.15rem 1.4rem;
}
.status-state { display: inline-flex; align-items: center; gap: 0.6rem; font-weight: 650; white-space: nowrap; }
.status-dot { width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px rgba(28, 127, 75, 0.13); flex: none; }
.status p { color: var(--muted); font-size: 0.95rem; margin: 0; }

/* ------------------------------------------------------------ заметка --- */

.notice {
  background: var(--accent-wash); border: 1px solid var(--line-3);
  border-left: 3px solid var(--accent); border-radius: var(--r); padding: 1.5rem 1.6rem;
}
.notice h2 { margin-bottom: 0.45rem; }
.notice p { color: var(--ink-2); max-width: 70ch; }
.notice.warn { background: rgba(255, 184, 107, 0.08); border-left-color: var(--warn); }

/* -------------------------------------------------------- содержимое --- */

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 1.6rem 1.5rem; }
.panel p, .panel li { color: var(--ink-2); }
.panel + .panel { margin-top: 1rem; }

.lede-page { color: var(--ink-2); font-size: 1.12rem; max-width: 58ch; margin: 0 0 2.5rem; }
.meta { font-family: var(--mono); color: var(--faint); font-size: 0.85rem; margin: 0 0 2.5rem; }

/* --------------------------------------------------- шаги и перечни --- */

.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; }
.steps li { position: relative; padding-left: 3rem; padding-bottom: 1.3rem; color: var(--ink-2); }
.steps li:last-child { padding-bottom: 0; }
.steps li::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 0.05rem;
  font-family: var(--mono); font-size: 0.8rem; color: var(--accent);
  border: 1px solid var(--line-3); border-radius: 6px; padding: 0.15rem 0.4rem;
  background: var(--surface-2);
}
.steps li::after {
  content: ""; position: absolute; left: 1.15rem; top: 2.1rem; bottom: 0.2rem;
  width: 1px; background: var(--line-3);
}
.steps li:last-child::after { display: none; }

.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.checks li { position: relative; padding-left: 1.55rem; color: var(--ink-2); }
.checks li::before {
  content: ""; position: absolute; left: 0.1rem; top: 0.7em;
  width: 0.4rem; height: 0.4rem; border-radius: 50%; background: var(--accent-mid);
}

/* ---------------------------------------------------------------- FAQ --- */

.faq { display: grid; gap: 0.8rem; }
.faq-item { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 1.25rem 1.35rem; transition: border-color 0.18s ease; }
.faq-item:hover { border-color: var(--line-3); }
.faq-item h3 { margin-bottom: 0.3rem; }
.faq-item p { color: var(--muted); font-size: 0.98rem; margin: 0; }

/* --------------------------------------------------------------- CTA --- */

.cta { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 2rem 1.6rem; display: grid; gap: 1.2rem; }
.cta h2 { margin-bottom: 0.3rem; }
.cta p { color: var(--muted); max-width: 52ch; margin: 0; }

/* ------------------------------------------------------------- подвал --- */

.site-footer { background: var(--surface); border-top: 1px solid var(--line); margin-top: 4rem; padding: 2.5rem 0; color: var(--muted); font-size: 0.94rem; }
.footer-top { display: flex; flex-wrap: wrap; gap: 1.5rem 3rem; align-items: flex-start; }
.footer-brand { color: var(--ink); font-weight: 650; margin: 0 0 0.35rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.3rem 1.4rem; list-style: none; margin: 0; padding: 0; }
.footer-note { margin: 1.75rem 0 0; padding-top: 1.25rem; border-top: 1px solid var(--line-2); font-family: var(--mono); font-size: 0.8rem; color: var(--faint); }

/* ------------------------------------------------------------- экраны --- */

@media (min-width: 46rem) {
  .page { padding: 3rem 0 4rem; }
  .hero { padding: 3.25rem 3rem; }
  .route { grid-template-columns: auto 1fr; gap: 2rem; align-items: start; }
  .route-steps { grid-template-columns: repeat(3, 1fr); gap: 0.85rem; }
  .panel { padding: 2rem 2.2rem; }
  .cta { grid-template-columns: 1fr auto; align-items: center; padding: 2.25rem 2.5rem; }
  .facts > div { border-top: none; border-left: 1px solid var(--line-2); }
  .facts > div:first-child { border-left: none; }
}

@media (max-width: 30rem) {
  .site-nav { margin-left: 0; width: 100%; }
  .hero { padding: 1.75rem 1.25rem; }
  .hero-actions .button { width: 100%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* --------------------------------------------------- карточка ссылки --- */

.linkcard {
  background: linear-gradient(180deg, var(--surface-2), #0b1320);
  border: 1px solid var(--line);
  border-radius: var(--r); padding: 1.3rem 1.4rem;
}
.linkcard-label {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--faint); margin: 0 0 0.8rem;
}
.linkcard-line {
  display: flex; align-items: center; gap: 0.45rem; flex-wrap: wrap;
  font-family: var(--mono); font-size: 0.95rem; color: var(--ink-2); word-break: break-word;
}
.linkcard-host { font-weight: 600; color: var(--ink); }
.linkcard-mask {
  display: inline-flex; gap: 0.3rem; align-items: center;
  padding: 0.3rem 0.7rem; border-radius: 999px;
  background: var(--accent-wash); border: 1px solid var(--line-3);
}
.linkcard-mask i { width: 5px; height: 5px; border-radius: 50%; background: var(--accent-mid); display: block; }
.linkcard-note {
  margin: 1rem 0 0; padding-top: 0.9rem; border-top: 1px solid var(--line-2);
  font-size: 0.9rem; color: var(--muted);
}

.split { display: grid; gap: 1rem; }

/* ------------------------------------------------------ помощь v3 --- */

.help-main {
  width: min(100%, 74rem);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 70px) clamp(16px, 4vw, 48px) clamp(54px, 8vw, 96px);
}

.help-hero {
  max-width: 48rem;
  margin-bottom: clamp(34px, 5vw, 60px);
}

.help-back,
.help-inline-link {
  display: inline-flex;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
}

.help-back { margin-bottom: 28px; }
.help-back:hover,
.help-inline-link:hover { color: var(--accent); }

.help-kicker {
  margin: 0 0 9px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.help-hero h1 {
  max-width: 16ch;
  margin: 0;
  font-size: clamp(2rem, 1.35rem + 2.7vw, 3.6rem);
}

.help-lead {
  max-width: 62ch;
  margin: 18px 0 0;
  color: var(--ink-2);
  font-size: clamp(1rem, 0.93rem + 0.28vw, 1.16rem);
  line-height: 1.7;
}

.help-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(17, 25, 39, 0.74);
  padding: clamp(22px, 3vw, 34px);
}

.help-card-primary {
  scroll-margin-top: 18px;
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(127, 232, 255, 0.07), transparent 65%),
    rgba(17, 25, 39, 0.8);
  border-color: rgba(127, 232, 255, 0.2);
}

.help-card-head { max-width: 48rem; }
.help-card-head h2,
.help-warning h2 { margin: 0; }
.help-card-head > p:last-child {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.help-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.help-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(11, 17, 29, 0.5);
}

.help-step-index {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.55;
}

.help-steps h3 { margin: 0 0 5px; font-size: 1rem; }
.help-steps p { margin: 0; color: var(--muted); font-size: 0.93rem; line-height: 1.58; }

.help-private {
  margin: 18px 0 0;
  color: var(--faint);
  font-size: 0.86rem;
}

.help-test-link {
  display: inline-flex;
  margin-top: 20px;
  padding: 10px 14px;
  border: 1px solid rgba(127, 232, 255, 0.42);
  border-radius: 10px;
  background: rgba(127, 232, 255, 0.055);
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}
.help-test-link:hover { border-color: var(--accent); color: var(--accent-deep); }

.help-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.help-section-gap { margin-top: 14px; }

.help-checks {
  display: grid;
  gap: 10px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}

.help-checks li {
  position: relative;
  padding-left: 22px;
  color: var(--ink-2);
  font-size: 0.94rem;
}

.help-checks li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 0.68em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-mid);
  box-shadow: 0 0 0 4px rgba(87, 166, 255, 0.1);
}

.help-facts { margin: 22px 0 0; padding: 0; list-style: none; }
.help-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-2);
}
.help-facts li:last-child { border-bottom: 0; }
.help-facts span { color: var(--faint); font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; }
.help-facts strong { color: var(--ink-2); font-size: 0.9rem; text-align: right; }
.help-muted { margin: 18px 0 0; color: var(--muted); font-size: 0.9rem; }

.help-warning {
  display: grid;
  grid-template-columns: minmax(15rem, 0.65fr) 1fr;
  align-items: start;
  gap: 24px;
  margin-top: 14px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid rgba(255, 184, 107, 0.22);
  border-radius: 18px;
  background: rgba(255, 184, 107, 0.055);
}
.help-warning .help-kicker { color: var(--warn); }
.help-warning p:last-child { margin: 0; color: var(--muted); line-height: 1.65; }

@media (max-width: 700px) {
  .help-main { padding-top: 28px; }
  .help-back { margin-bottom: 22px; }
  .help-steps,
  .help-grid,
  .help-warning { grid-template-columns: 1fr; }
  .help-facts li { align-items: flex-start; flex-direction: column; gap: 3px; }
  .help-facts strong { text-align: left; }
}
@media (min-width: 46rem) {
  .split { grid-template-columns: 1.25fr 0.75fr; gap: 1.25rem; align-items: start; }
}