:root {
  --nf-bg: #f8fafc;
  --nf-surface: #ffffff;
  --nf-primary: #1e293b;
  --nf-accent: #8b5cf6;
  --nf-accent-light: #ede9fe;
  --nf-secondary: #0ea5e9;
  --nf-secondary-light: #e0f2fe;
  --nf-red: #ef4444;
  --nf-text: #334155;
  --nf-text-light: #64748b;
  --nf-border: #e2e8f0;
  --nf-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
  --nf-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --nf-radius: 20px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--nf-bg);
  color: var(--nf-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Utils */
.nf-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.nf-section { padding: 100px 0; }
.nf-section-alt { background-color: var(--nf-surface); }
.nf-title-wrap { text-align: center; margin-bottom: 60px; max-width: 800px; margin-left: auto; margin-right: auto; }
.nf-h2 { font-size: 36px; color: var(--nf-primary); margin-bottom: 16px; font-weight: 800; letter-spacing: -0.02em; }
.nf-p { font-size: 18px; color: var(--nf-text-light); }

/* Buttons */
.nf-btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 28px; font-size: 16px; font-weight: 600;
  border-radius: 12px; border: none; cursor: pointer; transition: all 0.3s ease;
  text-decoration: none;
}
.nf-btn-primary {
  background: var(--nf-accent); color: #fff;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.3);
}
.nf-btn-primary:hover { background: #7c3aed; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4); }
.nf-btn-outline {
  background: transparent; color: var(--nf-primary);
  border: 2px solid var(--nf-border);
}
.nf-btn-outline:hover { border-color: var(--nf-primary); background: var(--nf-primary); color: #fff; }

/* Navbar */
.nf-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nf-border); height: 70px;
}
.nf-nav-inner {
  display: flex; justify-content: space-between; align-items: center; height: 100%;
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
}
.nf-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 22px; color: var(--nf-primary); }
.nf-nav-menu { display: flex; gap: 8px; }
.nf-nav-link {
  text-decoration: none; color: var(--nf-text-light); font-weight: 600; font-size: 15px;
  padding: 8px 16px; border-radius: 8px; transition: all 0.2s;
}
.nf-nav-link:hover { color: var(--nf-primary); background: var(--nf-bg); }
.nf-nav-link.active { color: var(--nf-accent); background: var(--nf-accent-light); }
.nf-nav-toggle { display: none; background: none; border: none; color: var(--nf-primary); font-size: 24px; cursor: pointer; }

/* Hero */
.nf-hero {
  padding: 160px 0 100px; text-align: center;
  background: radial-gradient(circle at top, #ede9fe 0%, var(--nf-bg) 70%);
}
.nf-hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: #fff;
  padding: 6px 16px; border-radius: 30px; font-size: 14px; font-weight: 600;
  color: var(--nf-accent); box-shadow: 0 2px 10px rgba(0,0,0,0.05); margin-bottom: 24px;
}
.nf-hero-h1 { font-size: 56px; font-weight: 800; color: var(--nf-primary); line-height: 1.15; margin-bottom: 24px; letter-spacing: -0.03em; }
.nf-hero-h1 span { color: var(--nf-accent); }
.nf-hero-p { font-size: 20px; color: var(--nf-text-light); max-width: 700px; margin: 0 auto 40px; }
.nf-hero-actions { display: flex; gap: 16px; justify-content: center; margin-bottom: 60px; }
.nf-stats-grid { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; }
.nf-stat-item { background: #fff; padding: 24px 32px; border-radius: var(--nf-radius); box-shadow: var(--nf-shadow); min-width: 200px; }
.nf-stat-val { font-size: 32px; font-weight: 800; color: var(--nf-primary); margin-bottom: 4px; }
.nf-stat-lbl { font-size: 14px; color: var(--nf-text-light); font-weight: 600; }

/* Features */
.nf-feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 80px; }
.nf-feat-card {
  background: var(--nf-surface); padding: 32px; border-radius: var(--nf-radius);
  box-shadow: var(--nf-shadow); transition: transform 0.3s;
}
.nf-feat-card:hover { transform: translateY(-5px); box-shadow: var(--nf-shadow-hover); }
.nf-feat-ico {
  width: 56px; height: 56px; border-radius: 16px; display: flex; align-items: center; justify-content: center;
  background: var(--nf-accent-light); color: var(--nf-accent); margin-bottom: 20px;
}
.nf-feat-h3 { font-size: 20px; color: var(--nf-primary); margin-bottom: 12px; font-weight: 700; }
.nf-feat-desc { font-size: 15px; color: var(--nf-text-light); }

.nf-deep-row { display: flex; align-items: center; gap: 60px; margin-bottom: 80px; }
.nf-deep-row.rev { flex-direction: row-reverse; }
.nf-deep-content { flex: 1; }
.nf-deep-h3 { font-size: 32px; font-weight: 800; color: var(--nf-primary); margin-bottom: 20px; }
.nf-deep-p { font-size: 17px; color: var(--nf-text-light); margin-bottom: 20px; }
.nf-deep-visual { flex: 1; background: var(--nf-secondary-light); border-radius: var(--nf-radius); padding: 40px; display: flex; justify-content: center; align-items: center; }

/* Platforms */
.nf-plat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.nf-plat-card {
  background: var(--nf-bg); border-radius: var(--nf-radius); padding: 32px 24px; text-align: center;
  border: 1px solid var(--nf-border); transition: all 0.3s;
}
.nf-plat-card.featured { background: var(--nf-surface); border-color: var(--nf-accent); box-shadow: 0 10px 30px rgba(139, 92, 246, 0.1); position: relative; }
.nf-plat-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--nf-accent); color: #fff; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.nf-plat-ico { color: var(--nf-primary); margin-bottom: 16px; }
.nf-plat-name { font-size: 20px; font-weight: 700; color: var(--nf-primary); margin-bottom: 8px; }
.nf-plat-req { font-size: 13px; color: var(--nf-text-light); margin-bottom: 20px; }

/* Reviews */
.nf-rev-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.nf-rev-card { background: var(--nf-bg); padding: 30px; border-radius: var(--nf-radius); }
.nf-rev-stars { color: #f59e0b; margin-bottom: 16px; display: flex; gap: 4px; }
.nf-rev-text { font-size: 16px; color: var(--nf-primary); font-style: italic; margin-bottom: 20px; }
.nf-rev-user { display: flex; align-items: center; gap: 12px; }
.nf-rev-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--nf-accent-light); color: var(--nf-accent); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.nf-rev-name { font-weight: 600; color: var(--nf-primary); font-size: 15px; }

/* Security */
.nf-sec-items { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 60px; }
.nf-sec-item { text-align: center; }
.nf-sec-ico { width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%; background: #dcfce7; color: #0d9488; display: flex; align-items: center; justify-content: center; }
.nf-sec-h4 { font-size: 18px; font-weight: 700; color: var(--nf-primary); margin-bottom: 8px; }
.nf-cmp-wrap { background: var(--nf-bg); border-radius: var(--nf-radius); overflow: hidden; border: 1px solid var(--nf-border); }
.nf-cmp-table { width: 100%; border-collapse: collapse; text-align: center; }
.nf-cmp-table th, .nf-cmp-table td { padding: 16px; border-bottom: 1px solid var(--nf-border); }
.nf-cmp-table th { background: var(--nf-surface); font-weight: 700; color: var(--nf-primary); }
.nf-cmp-table th:first-child, .nf-cmp-table td:first-child { text-align: left; padding-left: 24px; }
.nf-cmp-hl { background: var(--nf-accent-light); color: var(--nf-accent); font-weight: 700; }

/* Versions */
.nf-ver-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.nf-ver-card { background: var(--nf-surface); border-radius: var(--nf-radius); padding: 40px; box-shadow: var(--nf-shadow); text-align: center; border: 1px solid transparent; }
.nf-ver-card.featured { border-color: var(--nf-accent); transform: scale(1.05); }
.nf-ver-name { font-size: 24px; font-weight: 800; color: var(--nf-primary); margin-bottom: 16px; }
.nf-ver-price { font-size: 48px; font-weight: 800; color: var(--nf-primary); margin-bottom: 24px; }
.nf-ver-price span { font-size: 16px; color: var(--nf-text-light); font-weight: 400; }
.nf-ver-list { list-style: none; margin-bottom: 32px; text-align: left; }
.nf-ver-list li { margin-bottom: 12px; display: flex; align-items: center; gap: 8px; color: var(--nf-text); font-size: 15px; }

/* FAQ */
.nf-faq-list { max-width: 800px; margin: 0 auto; }
.nf-faq-item { background: var(--nf-surface); border-radius: 12px; margin-bottom: 16px; border: 1px solid var(--nf-border); overflow: hidden; }
.nf-faq-q { padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; font-weight: 700; color: var(--nf-primary); cursor: pointer; user-select: none; }
.nf-faq-chevron { transition: transform 0.3s; color: var(--nf-text-light); }
.nf-faq-a { max-height: 0; transition: max-height 0.3s ease; }
.nf-faq-a-inner { padding: 0 24px 20px; color: var(--nf-text-light); }
.nf-faq-item.open .nf-faq-chevron { transform: rotate(180deg); }
.nf-faq-item.open .nf-faq-a { max-height: 200px; }

/* Footer */
.nf-footer { background: var(--nf-primary); color: rgba(255,255,255,0.7); padding: 40px 0; text-align: center; font-size: 14px; }
.nf-footer-sec { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 16px; color: #dcfce7; }

/* Keyframes */
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Responsive */
@media(max-width: 1024px) {
  .nf-feat-grid, .nf-plat-grid, .nf-rev-grid, .nf-ver-grid, .nf-sec-items { grid-template-columns: repeat(2, 1fr); }
  .nf-ver-card.featured { transform: scale(1); }
}
@media(max-width: 768px) {
  .nf-nav-toggle { display: block; }
  .nf-nav-menu { display: none; position: absolute; top: 70px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; box-shadow: 0 10px 20px rgba(0,0,0,0.1); border-top: 1px solid var(--nf-border); }
  .nf-nav-menu.show { display: flex; }
  .nf-hero-h1 { font-size: 40px; }
  .nf-deep-row, .nf-deep-row.rev { flex-direction: column; text-align: center; }
  .nf-stats-grid { flex-direction: column; gap: 20px; }
  .nf-feat-grid, .nf-plat-grid, .nf-rev-grid, .nf-ver-grid, .nf-sec-items { grid-template-columns: 1fr; }
}