:root {
  --bg: #1d2633;
  --bg-2: #18202b;
  --card: #2c384a;
  --card-2: #34425a;
  --line: rgba(255, 255, 255, 0.08);
  --cyan: #36c5f0;
  --teal: #3ddabf;
  --green: #44eb99;
  --text: #ffffff;
  --text-2: #9aa6b8;
  --accent: linear-gradient(135deg, var(--cyan), var(--teal), var(--green));
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  font: 16px/1.6 "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(54, 197, 240, 0.16), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(68, 235, 153, 0.09), transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: rgba(255, 255, 255, 0.07); padding: 1px 6px; border-radius: 6px; font-size: 0.9em; }

.muted { color: var(--text-2); }
.small { font-size: 0.88rem; }
.center { text-align: center; }
.hidden { display: none !important; }

/* Шапка */
.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px clamp(16px, 5vw, 64px);
  background: rgba(29, 38, 51, 0.82); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand b { background: var(--accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.logo {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: var(--accent); color: var(--bg); font-weight: 900; font-size: 15px;
}
nav { display: flex; gap: 22px; }
nav a { color: var(--text-2); font-weight: 500; font-size: 0.95rem; }
nav a:hover { color: var(--text); text-decoration: none; }

main { padding: 0 clamp(16px, 5vw, 64px); }

/* Первый экран */
.hero {
  max-width: 1180px; margin: 0 auto; padding: clamp(40px, 8vw, 96px) 0 40px;
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 48px; align-items: center;
}
.eyebrow {
  display: inline-block; padding: 5px 12px; border-radius: 999px;
  background: rgba(61, 218, 191, 0.12); color: var(--teal); font-size: 0.85rem; font-weight: 600;
}
h1 { font-size: clamp(2.1rem, 4.6vw, 3.6rem); line-height: 1.08; margin: 18px 0; letter-spacing: -0.02em; }
.grad { background: var(--accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 1.12rem; color: #c9d2de; max-width: 560px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0 14px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 22px; border-radius: 14px;
  font-weight: 700; border: 1px solid transparent; cursor: pointer; font-size: 1rem;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: #102027; box-shadow: 0 10px 30px rgba(61, 218, 191, 0.25); }
.btn.ghost { color: var(--text); border-color: var(--line); background: rgba(255, 255, 255, 0.03); }
.btn.small { padding: 9px 14px; font-size: 0.92rem; border-radius: 11px; }
.btn.alt { background: var(--card-2); color: var(--text); }

.hero-art { position: relative; height: 440px; }
.hero-art .w { position: absolute; border-radius: 26px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45); }
.w1 { width: 58%; top: 0; right: 4%; transform: rotate(3deg); }
.w2 { width: 50%; top: 32%; left: 0; transform: rotate(-4deg); }
.w3 { width: 52%; bottom: 2%; right: 0; transform: rotate(-2deg); }
.w4 { display: none; }

/* Разделы */
.section { max-width: 1180px; margin: 0 auto; padding: 56px 0; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); text-align: center; margin: 0 0 10px; letter-spacing: -0.01em; }
h3 { margin: 6px 0 6px; font-size: 1.15rem; }

.card {
  background: linear-gradient(180deg, rgba(52, 66, 90, 0.55), rgba(44, 56, 74, 0.55));
  border: 1px solid var(--line); border-radius: 22px; padding: 22px;
}

.grid { display: grid; gap: 18px; margin-top: 28px; }
.features { grid-template-columns: repeat(3, 1fr); }
.features p { color: var(--text-2); margin: 0; }
.ic {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 14px;
  background: rgba(61, 218, 191, 0.12); font-size: 22px;
}

.platforms { grid-template-columns: repeat(3, 1fr); }
.platform { display: flex; flex-direction: column; gap: 16px; transition: border-color 0.2s, box-shadow 0.2s; }
.platform.recommended { border-color: rgba(61, 218, 191, 0.6); box-shadow: 0 0 0 4px rgba(61, 218, 191, 0.08); }
.platform.recommended::before {
  content: "Для вашего устройства"; align-self: flex-start; font-size: 0.78rem; font-weight: 700;
  color: var(--bg); background: var(--accent); padding: 3px 10px; border-radius: 999px;
}
.pf-head { display: flex; align-items: center; gap: 14px; }
.pf-head h3 { margin: 0; }
.pf-icon {
  display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px;
  background: var(--card-2); font-size: 24px; flex: none;
}
.version {
  margin-left: auto; padding: 4px 10px; border-radius: 999px; font-size: 0.82rem; font-weight: 700;
  background: rgba(68, 235, 153, 0.12); color: var(--green); white-space: nowrap;
}
.buttons { display: flex; flex-wrap: wrap; gap: 10px; }
.more { margin-top: auto; font-weight: 600; font-size: 0.95rem; }

/* Установка */
.tabs { display: flex; justify-content: center; gap: 8px; margin: 22px 0 18px; flex-wrap: wrap; }
.tab {
  padding: 9px 18px; border-radius: 999px; border: 1px solid var(--line); background: transparent;
  color: var(--text-2); font: inherit; font-weight: 600; cursor: pointer;
}
.tab.active { background: var(--accent); color: var(--bg); border-color: transparent; }
.panel { max-width: 820px; margin: 0 auto; }
.panel ol { margin: 0 0 12px; padding-left: 22px; }
.panel li { margin: 8px 0; }

/* Вопросы */
.faq { max-width: 820px; margin: 24px auto 0; display: grid; gap: 12px; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 1.05rem; }
.faq p { color: var(--text-2); margin: 12px 0 0; }

footer {
  margin-top: 40px; padding: 36px clamp(16px, 5vw, 64px); text-align: center;
  border-top: 1px solid var(--line); background: var(--bg-2);
}
.small-brand { justify-content: center; margin-bottom: 8px; }
.small-brand .logo { width: 28px; height: 28px; font-size: 12px; border-radius: 8px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero-art { height: 320px; }
  .features, .platforms { grid-template-columns: minmax(0, 1fr); }
  nav { display: none; }
}