:root {
  --bg: #f5f6fb;
  --bg-2: #eceef8;
  --card: rgba(255, 255, 255, 0.72);
  --card-solid: #ffffff;
  --fg: #12131a;
  --muted: #5d6175;
  --line: rgba(18, 19, 40, 0.10);
  --blue: #2f6bff;
  --violet: #6a3df0;
  --amber: #ffb21e;
  --accent: #3b5cff;
  --accent-fg: #ffffff;
  --glow: rgba(70, 90, 255, 0.18);
  --code-bg: #0f1220;
  --ok: #1f9d55;
  --err: #d33a3a;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #07080f;
    --bg-2: #0d0f1c;
    --card: rgba(22, 24, 40, 0.66);
    --card-solid: #141627;
    --fg: #eef0ff;
    --muted: #9a9fbd;
    --line: rgba(160, 170, 255, 0.12);
    --accent: #5c7bff;
    --glow: rgba(92, 110, 255, 0.28);
    --code-bg: #0b0d18;
    --ok: #4ad38a;
    --err: #ff6b6b;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

/* фон: мягкое сияние в цветах иконки */
.aurora {
  position: fixed; inset: -20vh -10vw auto; height: 90vh; z-index: -1; pointer-events: none;
  background:
    radial-gradient(40% 50% at 30% 30%, var(--glow), transparent 70%),
    radial-gradient(35% 45% at 70% 20%, rgba(106, 61, 240, 0.16), transparent 70%),
    radial-gradient(25% 30% at 55% 55%, rgba(255, 178, 30, 0.07), transparent 70%);
  filter: blur(20px);
}

/* шапка */
.nav { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px; background: var(--card);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 10px var(--amber); }

/* кнопки */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer;
  border: 0; border-radius: 11px; padding: 12px 20px;
  background: linear-gradient(135deg, var(--blue), var(--violet)); color: var(--accent-fg);
  box-shadow: 0 8px 24px -8px rgba(80, 70, 255, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transition: transform .15s ease, box-shadow .15s ease, opacity .15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 30px -8px rgba(80, 70, 255, 0.7), inset 0 1px 0 rgba(255,255,255,.25); }
.btn:disabled { opacity: .6; cursor: default; transform: none; }
.btn.ghost { background: var(--card); color: var(--fg); border: 1px solid var(--line); box-shadow: none; }
.btn.small { padding: 8px 14px; font-size: 14px; border-radius: 9px; }

/* первый экран */
.hero { text-align: center; padding: 56px 0 40px; }
.hero-icon { width: 112px; height: 112px; filter: drop-shadow(0 18px 40px rgba(70, 80, 255, 0.45)); }
.hero h1 {
  font-size: clamp(38px, 6.4vw, 68px); line-height: 1.04; letter-spacing: -0.035em;
  margin: 26px auto 18px; max-width: 820px; font-weight: 800;
}
.hero h1 .bolt {
  background: linear-gradient(120deg, var(--blue), var(--violet) 55%, var(--amber));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--muted); max-width: 620px; margin: 0 auto 30px; }
.hero .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .fine { margin-top: 14px; font-size: 13px; color: var(--muted); }

/* разделы */
section { padding: 88px 0 0; }
.eyebrow { font-size: 13px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin: 0 0 10px; }
h2 { font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.025em; line-height: 1.12; margin: 0 0 14px; }
.sub { color: var(--muted); max-width: 600px; margin: 0 0 40px; font-size: 17px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.card .ic {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(47,107,255,.16), rgba(106,61,240,.16)); color: var(--accent);
}
.card .ic svg { width: 20px; height: 20px; }
.card h3 { margin: 0 0 6px; font-size: 17px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* каналы */
.channels { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 700px) { .channels { grid-template-columns: 1fr; } }
.channel h3 { display: flex; align-items: center; gap: 10px; }
.tag { font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; padding: 3px 8px; border-radius: 6px; }
.tag.stable { background: rgba(31, 157, 85, .14); color: var(--ok); }
.tag.nightly { background: rgba(106, 61, 240, .16); color: #8f6dff; }

/* форма */
.request {
  margin-top: 0; border-radius: 22px; padding: 48px; position: relative; overflow: hidden;
  background: var(--card); border: 1px solid var(--line);
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px;
}
.request::before {
  content: ""; position: absolute; inset: auto -20% -60% 40%; height: 120%; pointer-events: none;
  background: radial-gradient(closest-side, var(--glow), transparent); z-index: 0;
}
.request > * { position: relative; }
@media (max-width: 820px) { .request { grid-template-columns: 1fr; padding: 28px 20px; } }
form { display: grid; gap: 14px; }
label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
label span.opt { font-weight: 400; color: var(--muted); }
input, textarea {
  font: inherit; font-size: 15px; color: var(--fg); background: var(--card-solid);
  border: 1px solid var(--line); border-radius: 10px; padding: 11px 13px; width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
textarea { resize: vertical; min-height: 92px; }
input:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--glow); }
.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.msg { font-size: 14px; min-height: 1.4em; margin: 0; }
.msg.err { color: var(--err); }
.done { display: none; align-self: center; text-align: center; }
.done.show { display: block; }
.done .big { font-size: 44px; line-height: 1; margin-bottom: 12px; }
.done h3 { font-size: 22px; margin: 0 0 6px; }
.done p { color: var(--muted); margin: 0; }
.checklist { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 10px; color: var(--muted); font-size: 15px; }
.checklist li::before { content: "✓"; color: var(--ok); font-weight: 700; margin-right: 10px; }

footer { padding: 72px 0 48px; color: var(--muted); font-size: 14px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* личная страница */
.invite { max-width: 720px; margin: 0 auto; padding: 32px 0 0; }
.invite h1 { font-size: clamp(32px, 5vw, 46px); letter-spacing: -0.03em; line-height: 1.1; margin: 18px 0 10px; }
.invite .lead { color: var(--muted); font-size: 18px; margin: 0 0 32px; }
.dl { display: flex; align-items: center; gap: 16px; }
.dl > div { flex: 1; min-width: 0; }
.dl .meta { color: var(--muted); font-size: 14px; overflow-wrap: anywhere; }
@media (max-width: 560px) { .dl { flex-direction: column; align-items: stretch; } }
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 32px 1fr; gap: 12px; align-items: start; }
.steps li::before {
  content: counter(step); width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  font-size: 13px; font-weight: 700; color: #fff; background: linear-gradient(135deg, var(--blue), var(--violet));
}
.key { display: flex; gap: 8px; margin-top: 10px; }
.key code {
  flex: 1; min-width: 0; font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; padding: 9px 12px;
  background: var(--card-solid); border: 1px solid var(--line); border-radius: 9px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.note { color: var(--muted); font-size: 14px; margin-top: 28px; }
.center { text-align: center; padding: 120px 0; }
.center p { color: var(--muted); }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .cursor { animation: none; }
  html { scroll-behavior: auto; }
}

/* ссылки в шапке */
.nav-links { display: flex; align-items: center; gap: 18px; font-size: 14px; font-weight: 600; }
.nav-links a:not(.btn) { color: var(--muted); text-decoration: none; }
.nav-links a:not(.btn):hover { color: var(--fg); }

/* три тезиса под окном */
.points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; padding-top: 40px; }
@media (max-width: 760px) { .points { grid-template-columns: 1fr; gap: 18px; } }
.point { display: grid; gap: 4px; }
.point b { font-size: 18px; letter-spacing: -0.01em; }
.point span { color: var(--muted); font-size: 15px; }

/* ввод ключа */
.keybox {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 16px 40px; align-items: center;
  padding: 32px 48px; border-radius: 22px; border: 1px dashed var(--line); background: transparent;
}
.keybox h2 { font-size: 24px; margin-bottom: 4px; }
.keybox form { display: flex; gap: 10px; }
.keybox input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.keybox .msg { grid-column: 2; }
@media (max-width: 820px) {
  .keybox { grid-template-columns: 1fr; padding: 24px 20px; }
  .keybox .msg { grid-column: 1; }
}
@media (max-width: 480px) { .keybox form { flex-direction: column; } }
#key { padding-top: 24px; }

/* закрытая страница */
.home-hero { text-align: center; padding: 40px 0 8px; }
.home-hero .pill { margin: 18px 0 0; }
.home-hero h1 { font-size: clamp(34px, 5.4vw, 54px); letter-spacing: -0.03em; line-height: 1.08; margin: 18px 0 12px; }
.home-hero .lead { color: var(--muted); font-size: 18px; max-width: 620px; margin: 0 auto; }
section.tight { padding-top: 40px; }
.dl { display: flex; flex-direction: column; justify-content: space-between; gap: 18px; }
.dl h3 { display: flex; align-items: center; gap: 10px; margin: 0 0 8px; }
.dl .meta { color: var(--muted); font-size: 14px; margin: 0; overflow-wrap: anywhere; }
.dl .build { margin-top: 10px; color: var(--fg); font-weight: 500; }
.dl .btn { align-self: flex-start; }
.card code { font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--bg-2); border-radius: 4px; padding: 0 4px; }
.feedback h3 { margin: 0 0 6px; }
.feedback p { margin: 0; color: var(--muted); }
.home-hero .hero-icon { display: block; margin: 0 auto; }
@media (max-width: 640px) { .nav-links a[href^="#"]:not(#signout) { display: none; } }

/* ченджлог */
.changelog { display: grid; gap: 14px; }
.release { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; }
.release header { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.release h3 { margin: 0; font-size: 16px; }
.release header .meta { margin-left: auto; color: var(--muted); font-size: 13px; }
.release ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 14px; display: grid; gap: 4px; }