:root {
      --bg: #040719;
      --bg-card: #0b1024;
      --bg-soft: #141a34;
      --accent: #5b8bff;
      --accent-soft: #a855f7;
      --accent-strong: #22d3ee;
      --text-main: #f9fafb;
      --text-muted: #a5acc7;
      --border: #1f2544;
      --success: #22c55e;
    }

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

    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: radial-gradient(circle at top, #111632 0, #040719 55%);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--accent);
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

    .page {
      max-width: 1080px;
      margin: 0 auto;
      padding: 1.5rem 1.25rem 2.5rem;
    }

    @media (min-width: 768px) {
      .page {
        padding: 2.5rem 1.5rem 3.5rem;
      }
    }

    /* HERO */
    .hero {
      border-radius: 1.5rem;
      padding: 2rem 1.5rem 2.2rem;
      background:
        radial-gradient(circle at top left, rgba(91, 139, 255, 0.35), transparent 55%),
        radial-gradient(circle at top right, rgba(168, 85, 247, 0.3), transparent 55%),
        linear-gradient(135deg, #050819, #101633);
      border: 1px solid rgba(91, 139, 255, 0.6);
      box-shadow: 0 32px 90px rgba(0, 0, 0, 0.78);
      display: grid;
      gap: 1.75rem;
    }

    @media (min-width: 900px) {
      .hero {
        grid-template-columns: 1.6fr 1.1fr;
      }
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.55rem;
      padding: 0.25rem 0.9rem 0.25rem 0.4rem;
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(148, 163, 184, 0.7);
      font-size: 0.75rem;
      color: var(--accent);
      margin-bottom: 0.9rem;
    }

    .hero-dot {
      width: 0.55rem;
      height: 0.55rem;
      border-radius: 999px;
      background: var(--success);
      box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.25);
    }

    .hero h1 {
      font-size: 1.9rem;
      margin-bottom: 0.6rem;
      letter-spacing: 0.02em;
    }

    @media (min-width: 768px) {
      .hero h1 {
        font-size: 2.2rem;
      }
    }

    .hero-lead {
      color: var(--text-muted);
      font-size: 0.98rem;
      max-width: 40rem;
      margin-bottom: 1.3rem;
    }

    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 0.65rem;
      margin-bottom: 1.5rem;
      font-size: 0.78rem;
    }

    .hero-meta span {
      padding: 0.25rem 0.75rem;
      border-radius: 999px;
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid rgba(148, 163, 184, 0.55);
      color: var(--text-muted);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 0.8rem;
      align-items: center;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.4rem;
      padding: 0.7rem 1.4rem;
      border-radius: 999px;
      border: none;
      background: linear-gradient(135deg, var(--accent-strong), var(--accent-soft));
      color: #020617;
      font-size: 0.9rem;
      font-weight: 600;
      cursor: pointer;
      box-shadow: 0 18px 48px rgba(91, 139, 255, 0.8);
      text-decoration: none;
      transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
      white-space: nowrap;
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 24px 60px rgba(91, 139, 255, 0.9);
      filter: brightness(1.04);
      text-decoration: none;
    }

    .btn-secondary {
      font-size: 0.85rem;
      color: var(--text-muted);
      border-bottom: 1px dashed rgba(148, 163, 184, 0.8);
    }

    .hero-device {
      border-radius: 1.3rem;
      background:
        radial-gradient(circle at top, rgba(91, 139, 255, 0.25), transparent 60%),
        var(--bg-card);
      border: 1px solid rgba(91, 139, 255, 0.5);
      padding: 1rem;
    }

    .hero-device h2 {
      font-size: 0.9rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      color: var(--text-muted);
      margin-bottom: 0.4rem;
    }

    .hero-device-title {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 0.4rem;
    }

    .hero-device p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 0.8rem;
    }

    .hero-device-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
      margin-bottom: 0.8rem;
    }

    .tag {
      font-size: 0.75rem;
      padding: 0.15rem 0.6rem;
      border-radius: 999px;
      border: 1px solid rgba(148, 163, 184, 0.5);
      background: rgba(15, 23, 42, 0.9);
    }

    .hero-device-note {
      font-size: 0.8rem;
      color: var(--accent-strong);
      border-top: 1px dashed rgba(148, 163, 184, 0.4);
      padding-top: 0.7rem;
    }

    /* LAYOUT */
    .layout {
      display: grid;
      gap: 2rem;
      margin-top: 2.5rem;
    }

    @media (min-width: 960px) {
      .layout {
        grid-template-columns: minmax(0, 3fr) minmax(0, 1.5fr);
      }
    }

    .article-card {
      background: rgba(9, 13, 30, 0.96);
      border-radius: 1.3rem;
      border: 1px solid var(--border);
      padding: 1.6rem 1.3rem 1.9rem;
    }

    @media (min-width: 768px) {
      .article-card {
        padding: 2rem 1.9rem 2.3rem;
      }
    }

    .article-card h2 {
      font-size: 1.25rem;
      margin: 1.4rem 0 0.6rem;
    }

    .article-card h3 {
      font-size: 1.02rem;
      margin: 1.2rem 0 0.4rem;
    }

    .article-card h4 {
      font-size: 0.95rem;
      margin: 0.8rem 0 0.25rem;
    }

    .article-card p {
      font-size: 0.96rem;
      color: var(--text-muted);
      margin-bottom: 0.9rem;
    }

    .article-card ul,
    .article-card ol {
      margin: 0.3rem 0 0.9rem 1.2rem;
      font-size: 0.94rem;
      color: var(--text-muted);
    }

    .article-card li {
      margin-bottom: 0.35rem;
    }

    .callout {
      border-radius: 0.9rem;
      background: rgba(20, 24, 52, 0.96);
      border: 1px solid rgba(91, 139, 255, 0.55);
      padding: 0.85rem 0.95rem;
      font-size: 0.88rem;
      color: var(--text-muted);
      margin: 1rem 0 1.2rem;
    }

    .callout span {
      color: var(--accent-strong);
      font-weight: 500;
    }

    /* SIDEBAR */
    .sidebar {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }

    .sidebar-block {
      background: var(--bg-card);
      border-radius: 1.1rem;
      border: 1px solid var(--border);
      padding: 1.1rem 1rem;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .sidebar-block h3 {
      font-size: 0.98rem;
      margin-bottom: 0.5rem;
      color: var(--text-main);
    }

    .keyword-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 0.35rem;
    }

    .keyword-pill {
      padding: 0.2rem 0.6rem;
      border-radius: 999px;
      border: 1px solid rgba(148, 163, 184, 0.55);
      font-size: 0.78rem;
    }

    .steps {
      list-style: none;
      margin-left: 0;
    }

    .steps li {
      position: relative;
      padding-left: 1.3rem;
      margin-bottom: 0.45rem;
    }

    .steps li::before {
      content: "•";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--accent-strong);
    }

    /* CTA */
    .cta {
      margin-top: 2.3rem;
      border-radius: 1.3rem;
      background:
        radial-gradient(circle at top left, rgba(88, 101, 242, 0.25), transparent 55%),
        radial-gradient(circle at bottom right, rgba(168, 85, 247, 0.25), transparent 55%),
        var(--bg-soft);
      border: 1px solid rgba(91, 139, 255, 0.7);
      padding: 1.6rem 1.3rem 1.7rem;
    }

    .cta-eyebrow {
      font-size: 0.78rem;
      text-transform: uppercase;
      letter-spacing: 0.16em;
      color: var(--accent-strong);
      margin-bottom: 0.35rem;
    }

    .cta h2 {
      font-size: 1.2rem;
      margin-bottom: 0.4rem;
    }

    .cta p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 0.9rem;
    }

    .cta-benefits {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 0.5rem;
      font-size: 0.84rem;
      margin-bottom: 1.1rem;
      color: var(--text-muted);
    }

    .cta-benefits span::before {
      content: "✓ ";
      color: var(--success);
      margin-right: 0.05rem;
    }

    @media (max-width: 640px) {
      .cta-benefits {
        grid-template-columns: 1fr;
      }
    }

    .cta-note {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-top: 0.4rem;
    }

    footer {
      margin-top: 2.4rem;
      font-size: 0.78rem;
      color: #6b7280;
      text-align: center;
    }