:root {
  --black: #0d1117;
  --black-2: #161b22;
  --black-3: #1c2128;
  --border: #30363d;
  --green: #3fb950;
  --green-dark: #2ea043;
  --text: #e6edf3;
  --muted: #8b949e;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.5px;
}
.logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--green);
  color: var(--black);
  font-size: 18px;
}
.logo__text { color: var(--text); }
.nav { display: flex; gap: 28px; }
.nav__link {
  color: var(--muted);
  font-size: 15px;
  transition: color 0.2s;
}
.nav__link:hover { color: var(--green); }
.header__phone {
  color: var(--green);
  font-weight: 600;
  white-space: nowrap;
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(63, 185, 80, 0.12), transparent 50%),
    radial-gradient(ellipse at 80% 100%, rgba(63, 185, 80, 0.08), transparent 50%),
    var(--black);
}
.hero__inner { max-width: 760px; }
.hero__title {
  font-size: 44px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.accent { color: var(--green); }
.hero__subtitle {
  color: var(--muted);
  font-size: 18px;
  margin-bottom: 32px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 16px;
  transition: transform 0.15s, background 0.2s, border-color 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--green); color: var(--black); }
.btn--primary:hover { background: var(--green-dark); }
.btn--ghost { border: 1px solid var(--border); color: var(--text); }
.btn--ghost:hover { border-color: var(--green); color: var(--green); }

/* Sections */
.section { padding: 80px 0; }
.section--alt { background: var(--black-2); }
.section__title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}
.section__lead { color: var(--muted); font-size: 17px; margin-bottom: 40px; }

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.grid--three { grid-template-columns: repeat(3, 1fr); }

/* Cards */
.card {
  background: var(--black-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: var(--green); transform: translateY(-4px); }
.card__title { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.card__text { color: var(--muted); font-size: 14px; }

/* Promo */
.promo { padding: 0 0 80px; }
.promo__box {
  position: relative;
  overflow: hidden;
  padding: 48px;
  border: 1px solid var(--green);
  border-radius: 18px;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(63, 185, 80, 0.18), transparent 55%),
    radial-gradient(ellipse at 10% 100%, rgba(63, 185, 80, 0.10), transparent 50%),
    var(--black-2);
}
.promo__content { max-width: 640px; }
.promo__title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 14px;
}
.promo__text { color: var(--muted); font-size: 16px; margin-bottom: 24px; }
.promo__phone {
  display: inline-block;
  color: var(--green);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  transition: color 0.2s;
}
.promo__phone:hover { color: var(--green-dark); }

/* Features */
.feature { padding: 8px 0; }
.feature__num {
  font-size: 40px;
  font-weight: 800;
  color: var(--green);
  opacity: 0.5;
  margin-bottom: 8px;
}
.feature__title { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.feature__text { color: var(--muted); font-size: 15px; }

/* About */
.about {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}
.about__text p { color: var(--muted); margin-bottom: 16px; font-size: 16px; }
.about__facts { display: flex; flex-direction: column; gap: 20px; }
.fact {
  display: flex;
  flex-direction: column;
  padding: 20px;
  background: var(--black-2);
  border: 1px solid var(--border);
  border-radius: 14px;
}
.fact__value { font-size: 32px; font-weight: 800; color: var(--green); }
.fact__label { color: var(--muted); font-size: 14px; }

/* Contacts */
.contacts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.contacts__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px;
  background: var(--black-3);
  border: 1px solid var(--border);
  border-radius: 14px;
}
.contacts__label { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; }
.contacts__value { font-size: 17px; font-weight: 600; }
.contacts__link { color: var(--green); }
.contacts__link:hover { text-decoration: underline; }
.contacts__cta { font-size: 18px; }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}
.footer__phone { color: var(--green); font-weight: 600; }

/* Responsive */
@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .grid--three { grid-template-columns: 1fr; }
  .about { grid-template-columns: 1fr; }
  .hero__title { font-size: 34px; }
}
@media (max-width: 640px) {
  .nav { display: none; }
  .header__phone { font-size: 14px; }
  .grid { grid-template-columns: 1fr; }
  .contacts { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 56px; }
  .hero__title { font-size: 28px; }
  .section { padding: 56px 0; }
  .promo { padding: 0 0 56px; }
  .promo__box { padding: 32px 24px; }
  .promo__title { font-size: 22px; }
  .promo__phone { font-size: 22px; }
}