:root {
  --bg: #0d0b1f;
  --bg-soft: #151131;
  --card: rgba(255, 255, 255, 0.08);
  --card-strong: rgba(255, 255, 255, 0.12);
  --text: #f4f7ff;
  --muted: #b8bfd8;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --accent-3: #ff4ecd;
  --accent-4: #ffc857;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --radius: 22px;
  --radius-sm: 16px;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(139, 92, 246, 0.24), transparent 34%),
    radial-gradient(circle at top right, rgba(34, 211, 238, 0.18), transparent 28%),
    linear-gradient(180deg, #0b0918 0%, #100d25 50%, #0b0918 100%);
  line-height: 1.7;
}

img {
  display: block;
  max-width: 100%;
  border-radius: var(--radius);
}

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

.wrap {
  width: min(calc(100% - 32px), var(--max));
  margin-inline: auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(10, 9, 24, 0.7);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 62px;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.02em;
  color: #fff;
}

.mini-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.mini-nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.mini-nav a:hover {
  color: #fff;
}

.article {
  padding: 22px 0 70px;
}

.hero {
  display: grid;
  gap: 26px;
  align-items: center;
  padding-top: 20px;
}

.hero-copy,
.hero-media,
.card,
.table-card,
.card-soft,
.highlight,
.toc,
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 24px;
  border-radius: var(--radius);
}

.eyebrow {
  display: inline-block;
  padding: 7px 12px;
  margin-bottom: 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.24), rgba(34, 211, 238, 0.2));
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0 0 14px;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.45rem, 2.8vw, 2.2rem);
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.1rem;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

.lead {
  font-size: 1.06rem;
  color: #e7ebfb;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.2s ease;
}

.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-3));
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid var(--line);
}

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

.hero-media {
  overflow: hidden;
  border-radius: var(--radius);
}

.quick-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.card {
  padding: 18px;
  border-radius: var(--radius-sm);
}

.label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.88rem;
}

.card strong {
  font-size: 1rem;
}

.toc,
.section,
.highlight {
  margin-top: 22px;
  border-radius: var(--radius);
}

.toc {
  padding: 22px;
}

.toc ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.toc li + li {
  margin-top: 8px;
}

.toc a:hover {
  color: #fff;
}

.section {
  padding: 24px;
}

.section-grid {
  display: grid;
  gap: 20px;
}

.section-media {
  margin: 0;
}

.table-card {
  margin: 18px 0;
  padding: 10px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  color: var(--text);
}

th,
td {
  padding: 14px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

th {
  color: #fff;
}

.pros-cons {
  display: grid;
  gap: 14px;
}

.card-soft {
  padding: 20px;
  border-radius: var(--radius-sm);
}

.card-soft ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.keywords span {
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.18), rgba(34, 211, 238, 0.16));
  border: 1px solid var(--line);
  color: #fff;
  font-size: 0.92rem;
}

.highlight {
  padding: 24px;
  background:
    linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(255, 78, 205, 0.14)),
    var(--card);
}

.faq {
  display: grid;
  gap: 12px;
}

.faq details {
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  color: #fff;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq p {
  margin: 12px 0 0;
}

@media (min-width: 768px) {
  .hero {
    grid-template-columns: 1.08fr 0.92fr;
  }

  .section-grid {
    grid-template-columns: 1fr 0.95fr;
    align-items: center;
  }

  .section-grid.reverse {
    grid-template-columns: 0.95fr 1fr;
  }

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

  .pros-cons {
    grid-template-columns: 1fr 1fr;
  }

  .hero-copy,
  .section,
  .toc,
  .highlight {
    padding: 30px;
  }
}

@media (max-width: 767px) {
  .mini-nav {
    display: none;
  }

  .topbar-inner {
    min-height: 56px;
  }

  .article {
    padding-top: 12px;
  }

  h1 {
    font-size: 2rem;
  }

  .hero-copy,
  .section,
  .toc,
  .highlight {
    padding: 20px;
  }

  .btn {
    width: 100%;
  }
}