/* AviaRadar — лендинг. Ноль внешних зависимостей: CSP разрешает только 'self'. */

:root {
  --bg: #0b1220;
  --bg-soft: #111c31;
  --panel: rgba(255, 255, 255, 0.04);
  --line: rgba(255, 255, 255, 0.1);
  --text: #e8edf6;
  --muted: #93a3bd;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --radius: 14px;
  --maxw: 1080px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f9fc;
    --bg-soft: #ffffff;
    --panel: #ffffff;
    --line: rgba(15, 30, 55, 0.12);
    --text: #10192b;
    --muted: #55637d;
    --accent: #0284c7;
    --accent-strong: #0369a1;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }
em { font-style: normal; color: var(--accent); }

/* --- шапка --- */
.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.6;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
}
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); }
.nav-links .btn { color: #04121f; }

/* --- кнопки --- */
.btn {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: #04121f;
  font-weight: 650;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { background: var(--accent-strong); text-decoration: none; transform: translateY(-1px); }
.btn-sm { padding: 9px 16px; font-size: 14px; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { background: var(--panel); }

/* --- герой --- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 72px 20px 40px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(30px, 4.6vw, 50px);
  margin: 0 0 20px;
}

.lead {
  font-size: clamp(16px, 1.6vw, 18px);
  color: var(--muted);
  max-width: 56ch;
  margin: 0 0 28px;
}

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.fineprint { font-size: 13px; color: var(--muted); margin-top: 14px; }

/* --- радар --- */
.hero-visual { display: flex; justify-content: center; }

.radar {
  position: relative;
  width: min(320px, 78vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, var(--bg-soft), transparent 72%);
  border: 1px solid var(--line);
  overflow: hidden;
}

.radar .ring {
  position: absolute;
  inset: 0;
  margin: auto;
  border: 1px solid var(--line);
  border-radius: 50%;
}
.radar .ring:nth-of-type(1) { width: 33%; height: 33%; }
.radar .ring:nth-of-type(2) { width: 63%; height: 63%; }
.radar .ring:nth-of-type(3) { width: 90%; height: 90%; }

.radar .sweep {
  position: absolute;
  inset: 0;
  background: conic-gradient(from 0deg, transparent 0deg, transparent 300deg, rgba(56, 189, 248, 0.35) 358deg, transparent 360deg);
  animation: sweep 4s linear infinite;
}

.radar .blip {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: blink 4s ease-in-out infinite;
}
.blip-1 { top: 30%; left: 62%; animation-delay: 0.4s; }
.blip-2 { top: 61%; left: 37%; animation-delay: 1.9s; }
.blip-3 { top: 46%; left: 74%; animation-delay: 3.1s; }

@keyframes sweep { to { transform: rotate(360deg); } }
@keyframes blink { 0%, 70%, 100% { opacity: 0.15; } 80% { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  .radar .sweep, .radar .blip { animation: none; }
  .radar .blip { opacity: 0.9; }
}

/* --- секции --- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 20px;
  border-top: 1px solid var(--line);
}

.section h2 { font-size: clamp(23px, 2.8vw, 31px); margin: 0 0 8px; }
.section-sub { color: var(--muted); margin: 0 0 28px; max-width: 62ch; }

/* --- шаги --- */
.steps {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.steps li { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.steps h3 { font-size: 18px; margin: 12px 0 8px; }
.steps p { color: var(--muted); margin: 0; font-size: 15px; }

.step-n {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent);
  color: #04121f;
  font-weight: 700;
  font-size: 14px;
}

/* --- карточки --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 28px;
}
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card h3 { font-size: 17px; margin: 0 0 10px; }
.card p { color: var(--muted); margin: 0; font-size: 15px; }

/* --- маршруты --- */
.routes {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.routes li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 15px;
  font-size: 14px;
  color: var(--muted);
  background: var(--panel);
}

/* --- тарифы --- */
.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 28px;
}
.plan {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
}
.plan-pro { border-color: var(--accent); }
.plan h3 { margin: 0; font-size: 15px; letter-spacing: 0.1em; color: var(--muted); }
.plan .price { font-size: 34px; font-weight: 700; margin: 8px 0 20px; }
.plan .price span { font-size: 15px; font-weight: 400; color: var(--muted); }
.plan ul { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 10px; font-size: 15px; }
.plan li { padding-left: 24px; position: relative; color: var(--muted); }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
.plan li strong { color: var(--text); }
.plan .btn { margin-top: auto; text-align: center; }
.plan .fineprint { text-align: center; margin-bottom: 0; }

/* --- честный блок --- */
.section-honest p { color: var(--muted); max-width: 72ch; margin: 12px 0 0; }

/* --- подвал --- */
.footer { border-top: 1px solid var(--line); margin-top: 40px; background: var(--bg-soft); }
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: 36px 20px; }
.footer p { margin: 0 0 12px; }
.footer .fineprint { max-width: 78ch; }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 18px; font-size: 14px; }
.footer-links a { color: var(--muted); }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 44px; gap: 36px; }
  .hero-visual { order: -1; }
  .nav-links { gap: 14px; font-size: 14px; }
}