:root {
  --bg: #0b0f14;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #4f9cff;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.container {
  max-width: 1100px;
  padding: 16px;
  margin: auto;
}

header {
  position: sticky;
  top: 0;
  background: rgba(11,15,20,.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  z-index: 10;
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 26px;
  border-radius: 14px;
  background: linear-gradient(135deg, #5aa9ff, #5f6bff);
  color: #050b18;
  font-weight: 700;
  text-decoration: none;
  font-size: 16px;
}

.btn-main {
  font-size: 17px;
  padding: 16px 32px;
}

.hero {
  padding: 34px 0;
}

.card {
  background: linear-gradient(180deg, #121a2a, #0f1626);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  line-height: 1.15;
  margin: 0 0 14px;
}

h2 {
  margin-top: 0;
}

.subtitle {
  color: var(--muted);
  font-size: 16px;
  max-width: 780px;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.feature {
  background: rgba(255,255,255,.04);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 14px;
}

.cta {
  margin-top: 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.phone {
  font-size: 20px;
  font-weight: 700;
}

.phone span {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  margin-top: 2px;
}

.photos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.photos img {
  width: 100%;
  border-radius: 14px;
}

.faq details {
  background: rgba(255,255,255,.04);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq summary {
  font-weight: 600;
  cursor: pointer;
}

footer {
  color: var(--muted);
  font-size: 13px;
  padding: 40px 0 90px;
}

.sticky {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(11,15,20,.96);
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 12px;
}

.sticky .btn {
  width: 100%;
}

@media (min-width: 900px) {
  .features {
    grid-template-columns: repeat(4, 1fr);
  }
  .photos {
    grid-template-columns: repeat(4, 1fr);
  }
  .sticky {
    display: none;
  }
}