/* ===== Базовые стили и переменные ===== */
:root {
  --bg: #0a0e1a;
  --bg-2: #0e1526;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-2: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);
  --vk-blue: #0077ff;
  --vk-cyan: #00e5ff;
  --vk-purple: #8b5cff;
  --gradient: linear-gradient(90deg, #0077ff, #00e5ff);
  --gradient-2: linear-gradient(135deg, #0077ff 0%, #8b5cff 100%);
  --text: #eaf2ff;
  --muted: #9fb0c9;
  --radius: 22px;
  --shadow: 0 20px 60px rgba(0, 119, 255, 0.22);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Segoe UI", -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
h1, h2, h3, h4 { font-family: "Unbounded", "Inter", sans-serif; font-weight: 600; line-height: 1.3; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
section { padding: 90px 6vw; }
.wrap { max-width: 1200px; margin: 0 auto; }

/* ===== Заголовки секций ===== */
.sec-head { text-align: center; max-width: 800px; margin: 0 auto 60px; }
.sec-head .tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--vk-cyan);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.sec-head h2 { font-size: clamp(26px, 4vw, 44px); margin-bottom: 14px; }
.sec-head p { color: var(--muted); font-size: clamp(15px, 1.6vw, 18px); }

.grad-text { background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.grad-text-violet { background: var(--gradient-2); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.glow { filter: drop-shadow(0 0 12px rgba(0, 229, 255, 0.55)); }


/* ===== Header ===== */
header {
  position: fixed;
  top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(10, 14, 26, 0.7);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.nav { max-width: 1200px; margin: 0 auto; padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-family: "Unbounded", sans-serif; font-weight: 700; font-size: 20px; }
.logo-mark { width: 40px; height: 40px; border-radius: 12px; background: var(--gradient); display: grid; place-items: center; font-size: 20px; box-shadow: 0 0 18px rgba(0, 229, 255, 0.5); }
.nav-links { display: flex; gap: 8px; }
.nav-links a { padding: 9px 18px; border-radius: 100px; font-weight: 500; font-size: 15px; color: var(--muted); transition: color 0.25s, background 0.25s; }
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.active { color: #fff; background: var(--gradient-2); box-shadow: var(--shadow); }

.burger { display: none; cursor: pointer; background: none; border: none; flex-direction: column; gap: 6px; padding: 6px; }
.burger span { width: 26px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.3s; }
.burger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ===== Кнопки ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 16px;
  border: none;
  cursor: pointer;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s, color 0.25s;
}
.btn-primary { background: var(--gradient); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 26px 70px rgba(0, 229, 255, 0.35); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--vk-cyan); color: var(--vk-cyan); transform: translateY(-3px); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 6vw 80px;
  overflow: hidden;
}
.blob { position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.45; pointer-events: none; }
.hero .blob-1 { width: 520px; height: 520px; top: -140px; left: -140px; background: var(--vk-blue); }
.hero .blob-2 { width: 560px; height: 560px; bottom: -180px; right: -160px; background: var(--vk-purple); }
.hero .blob-3 { width: 380px; height: 380px; top: 30%; left: 55%; background: var(--vk-cyan); opacity: 0.28; }
.hero-content { position: relative; z-index: 2; max-width: 900px; }
.hero .tag-line { font-size: 15px; letter-spacing: 3px; color: var(--vk-cyan); text-transform: uppercase; margin-bottom: 26px; }
.hero h1 { font-size: clamp(32px, 6vw, 70px); margin-bottom: 28px; }
.hero p.lead { font-size: clamp(16px, 2vw, 21px); color: var(--muted); margin-bottom: 44px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Сетки карточек ===== */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 26px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.35s, box-shadow 0.35s, background 0.35s;
}
.card:hover { transform: translateY(-8px); background: var(--surface-2); box-shadow: var(--shadow); }
.card .icon { font-size: 40px; margin-bottom: 18px; display: block; }
.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { color: var(--muted); font-size: 15px; }
.card ul.feature-list { margin-top: 14px; }
.card ul.feature-list li { display: flex; gap: 10px; font-size: 14.5px; color: var(--muted); margin-top: 8px; align-items: flex-start; }
.card ul.feature-list li::before { content: "✓"; color: var(--vk-cyan); font-weight: 700; }


/* ===== Timeline (шаги) ===== */
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--vk-blue), var(--vk-cyan), var(--vk-purple), transparent);
}
.t-item { position: relative; padding: 0 0 40px 76px; }
.t-item::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--vk-cyan);
  box-shadow: 0 0 0 6px rgba(0, 229, 255, 0.15), 0 0 20px rgba(0, 229, 255, 0.6);
}
.t-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.t-card:hover { transform: translateX(8px); box-shadow: var(--shadow); }
.t-item h3 { font-size: 20px; margin-bottom: 8px; color: #fff; }
.t-item .num { color: var(--vk-cyan); font-size: 14px; font-weight: 700; letter-spacing: 2px; }
.t-item p { color: var(--muted); font-size: 15px; }

/* ===== Счётчики ===== */
.stats { display: flex; flex-wrap: wrap; justify-content: center; gap: 40px; max-width: 1100px; margin: 0 auto; }
.stat { text-align: center; flex: 1 1 200px; }
.stat .value { display: block; font-family: "Unbounded", sans-serif; font-size: clamp(34px, 5vw, 60px); font-weight: 700; background: var(--gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat .label { color: var(--muted); font-size: 15px; }

/* ===== Советы ===== */
.tip {
  display: flex;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--vk-cyan);
  border-radius: 16px;
  padding: 20px 24px;
  margin: 0 auto 18px;
  max-width: 900px;
}
.tip .tip-ic { font-size: 26px; flex-shrink: 0; }
.tip h4 { font-size: 17px; margin-bottom: 6px; }
.tip p { color: var(--muted); font-size: 15px; }

/* ===== CTA-блок ===== */
.cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(0, 119, 255, 0.18), rgba(139, 92, 255, 0.18));
  border: 1px solid var(--border);
  border-radius: 30px;
  padding: 60px 30px;
}
.cta h2 { font-size: clamp(24px, 3.6vw, 40px); margin-bottom: 16px; }
.cta p { color: var(--muted); max-width: 640px; margin: 0 auto 30px; }

/* ===== Hero подстраниц ===== */
.page-hero {
  position: relative;
  padding: 170px 6vw 70px;
  text-align: center;
  overflow: hidden;
}
.page-hero h1 { font-size: clamp(28px, 5vw, 54px); margin-bottom: 18px; }
.page-hero p { color: var(--muted); font-size: clamp(15px, 1.8vw, 19px); max-width: 760px; margin: 0 auto; }
.page-hero .blob-1 { width: 420px; height: 420px; }
.page-hero .blob-2 { width: 460px; height: 460px; }

/* ===== Анимации появления ===== */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.2s; }
.reveal-d3 { transition-delay: 0.3s; }

/* ===== Footer ===== */
footer {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding: 60px 6vw 40px;
  background: linear-gradient(to bottom, transparent, rgba(0, 119, 255, 0.07));
}
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 36px; max-width: 1200px; margin: 0 auto; }
.footer-grid h4 { font-size: 17px; margin-bottom: 16px; }
.footer-grid a { display: block; color: var(--muted); font-size: 15px; padding: 5px 0; transition: color 0.2s; }
.footer-grid a:hover { color: var(--vk-cyan); }
.footer-bottom { text-align: center; margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255, 255, 255, 0.06); color: var(--muted); font-size: 14px; }

/* ===== Мобильные ===== */
@media (max-width: 768px) {
  section { padding: 70px 5vw; }
  .nav-links {
    position: fixed;
    top: 78px;
    right: 0;
    width: 260px;
    height: 220px;
    flex-direction: column;
    gap: 6px;
    padding: 16px 16px 24px;
    background: rgba(10, 14, 26, 0.96);
    border-left: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    border-radius: 0 0 0 22px;
    transform: translateX(110%);
    opacity: 0;
    transition: transform 0.35s ease, opacity 0.35s ease;
  }
  .nav-links.open { transform: translateX(0); opacity: 1; }
  .nav-links a { text-align: right; }
  .burger { display: flex; }
  .timeline::before { left: 18px; }
  .t-item { padding-left: 54px; }
  .t-item::before { left: 12px; }
  .hero { min-height: auto; padding-top: 150px; }
}