:root {
  --bg-start: #17181d;
  --bg-end: #242733;
  --card: rgba(16, 18, 24, 0.85);
  --card-border: rgba(255, 255, 255, 0.12);
  --text: #ffffff;
  --muted: rgba(255, 255, 255, 0.78);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Montserrat", "Segoe UI", sans-serif;
  color: var(--text);
}

body {
  background:
    radial-gradient(circle at 20% 20%, rgba(95, 130, 255, 0.22), transparent 45%),
    radial-gradient(circle at 80% 10%, rgba(40, 207, 255, 0.2), transparent 40%),
    linear-gradient(160deg, var(--bg-start), var(--bg-end));
}

.offer-page {
  min-height: calc(100vh - 54px);
  display: block;
  padding: 24px 16px 40px;
}

.offer-card {
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 28px 24px;
  border: 1px solid var(--card-border);
  border-radius: 24px;
  background: var(--card);
  backdrop-filter: blur(8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.offer-header {
  text-align: center;
  margin-bottom: 24px;
}

.logo {
  width: clamp(84px, 16vw, 148px);
  height: auto;
  margin-bottom: 14px;
}

.logo-link {
  display: inline-block;
  border-radius: 14px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.logo-link:hover {
  transform: translateY(-2px);
  opacity: 0.92;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 2vw, 18px);
}

.offer-content {
  line-height: 1.7;
  font-size: clamp(16px, 2vw, 18px);
}

.offer-content h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3vw, 30px);
}

.offer-content h3 {
  margin: 28px 0 10px;
  font-size: clamp(20px, 2.5vw, 26px);
  line-height: 1.25;
}

.offer-content p {
  margin: 0 0 12px;
}

.offer-content ul {
  margin: 0 0 14px;
  padding-left: 22px;
}

.offer-content li {
  margin: 0 0 6px;
}

.offer-content .dash-list {
  list-style: none;
  padding-left: 0;
}

.offer-content .dash-list li {
  position: relative;
  padding-left: 18px;
}

.offer-content .dash-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--muted);
}

.lead {
  margin: 0 0 14px;
  font-weight: 600;
  color: var(--muted);
}

.site-footer {
  text-align: center;
  padding: 14px 12px 20px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.92);
}

@media (max-width: 640px) {
  .offer-page {
    padding: 16px 12px 30px;
  }

  .offer-card {
    border-radius: 18px;
    padding: 20px 16px;
  }
}