:root {
  --bg: #07101a;
  --bg-soft: rgba(10, 19, 30, 0.82);
  --card: rgba(12, 24, 36, 0.88);
  --line: rgba(135, 202, 244, 0.14);
  --line-strong: rgba(135, 202, 244, 0.26);
  --text: #edf6fb;
  --muted: #9bb2c4;
  --accent: #8fd2ff;
  --accent-strong: #32a8d8;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.34);
  --radius: 28px;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(50, 168, 216, 0.18), transparent 28%),
    radial-gradient(circle at bottom right, rgba(0, 196, 179, 0.18), transparent 22%),
    linear-gradient(160deg, #040a10 0%, #08131d 36%, #07101a 100%);
  color: var(--text);
}

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

.shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 16px;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin: 16px auto 0;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(13, 26, 39, 0.96), rgba(6, 12, 19, 0.84));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.brand img {
  width: 132px;
  height: 74px;
  object-fit: contain;
}

.eyebrow {
  margin: 0 0 6px;
  color: #7fd9ff;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 11px;
  font-weight: 700;
}

.brand h1,
.hero-copy h2,
.section-head h2,
.plan-card h3 {
  margin: 0;
}

.brand-subtitle,
.muted {
  margin: 4px 0 0;
  color: var(--muted);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, #9fe4ff, #32a8d8);
  color: #041119;
  box-shadow: 0 12px 34px rgba(50, 168, 216, 0.24);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.1);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.9fr);
  gap: 26px;
  align-items: center;
  padding: 46px 0 24px;
}

.hero-copy,
.hero-card,
.section-card,
.plan-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(12, 24, 36, 0.92), rgba(7, 14, 22, 0.9));
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 42px;
}

.hero-copy h2 {
  font-size: clamp(38px, 6vw, 72px);
  line-height: 0.94;
  letter-spacing: -0.05em;
}

.hero-copy p {
  margin: 18px 0 0;
  color: #d4ebf7;
  font-size: 18px;
  line-height: 1.7;
  max-width: 720px;
}

.hero-card {
  padding: 28px;
}

.hero-card .preview {
  width: 100%;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, rgba(143, 210, 255, 0.1), rgba(11, 23, 34, 0.95));
}

.hero-card .preview img {
  display: block;
  width: 100%;
  height: auto;
}

.section {
  padding: 28px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 18px;
}

.section-head h2 {
  font-size: clamp(28px, 3vw, 42px);
  letter-spacing: -0.04em;
}

.grid-3,
.grid-4 {
  display: grid;
  gap: 18px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.section-card,
.plan-card {
  padding: 24px;
}

.section-card h3,
.plan-card h3 {
  font-size: 24px;
  letter-spacing: -0.03em;
}

.section-card p,
.plan-card p,
.plan-card li {
  color: var(--muted);
  line-height: 1.6;
}

.plan-card ul {
  margin: 16px 0 0;
  padding-left: 18px;
}

.footer {
  padding: 24px 0 46px;
  color: var(--muted);
}

@media (max-width: 1024px) {
  .hero,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .topbar,
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}