/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  --ns-black: #080a0f;
  --ns-surface: #0d1117;
  --ns-surface-2: #161b25;
  --ns-border: #1e2736;
  --ns-white: #f0f4f8;
  --ns-muted: #6b7a96;
  --ns-cyan: #00d4ff;
  --ns-cyan-dim: #00d4ff22;
  --ns-cyan-glow: #00d4ff44;
  --ns-green: #00ff88;
  --ns-font: 'Space Grotesk', system-ui, sans-serif;
}

/* ===== BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--ns-font);
  background-color: var(--ns-black);
  color: var(--ns-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Tailwind color overrides via CSS vars */
.bg-ns-black { background-color: var(--ns-black); }
.bg-ns-surface { background-color: var(--ns-surface); }
.text-ns-white { color: var(--ns-white); }
.text-ns-muted { color: var(--ns-muted); }
.text-ns-cyan { color: var(--ns-cyan); }
.border-ns-border { border-color: var(--ns-border); }
.font-space { font-family: var(--ns-font); }

/* ===== GRADIENT TEXT ===== */
.gradient-text {
  background: linear-gradient(135deg, var(--ns-cyan) 0%, var(--ns-green) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ns-cyan);
  color: var(--ns-black);
  font-weight: 700;
  font-family: var(--ns-font);
  border-radius: 8px;
  padding: 10px 22px;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 2px solid var(--ns-cyan);
  letter-spacing: 0.01em;
  cursor: pointer;
}
.btn-primary:hover {
  background: transparent;
  color: var(--ns-cyan);
  box-shadow: 0 0 24px var(--ns-cyan-glow);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--ns-white);
  font-weight: 600;
  font-family: var(--ns-font);
  border-radius: 8px;
  padding: 10px 22px;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 2px solid var(--ns-border);
  cursor: pointer;
}
.btn-ghost:hover {
  border-color: var(--ns-cyan);
  color: var(--ns-cyan);
}

/* ===== NAVIGATION ===== */
#site-header {
  transition: background 0.3s ease;
}

.nav-link {
  color: var(--ns-muted);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--ns-white); }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 2px;
  background: var(--ns-cyan);
  border-radius: 2px;
}

.ham-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ns-white);
  border-radius: 2px;
  transition: all 0.3s ease;
}
#hamburger.open .ham-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#hamburger.open .ham-line:nth-child(2) { opacity: 0; }
#hamburger.open .ham-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: var(--ns-surface);
  border-top: 1px solid var(--ns-border);
}
.mobile-menu.open { max-height: 400px; }

.mobile-nav-link {
  display: block;
  padding: 12px 16px;
  color: var(--ns-muted);
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.2s;
  font-size: 0.95rem;
}
.mobile-nav-link:hover { color: var(--ns-white); background: var(--ns-surface-2); }

/* ===== HERO SECTION ===== */
.hero-section { background-color: var(--ns-black); }

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--ns-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--ns-border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 100%);
  opacity: 0.4;
}

.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, var(--ns-cyan-dim) 0%, transparent 70%);
  pointer-events: none;
}

/* ===== SHIELD VISUAL ===== */
.shield-visual {
  position: relative;
  width: 340px;
  height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shield-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--ns-cyan);
  animation: ringPulse 3s ease-in-out infinite;
}
.ring-1 { width: 100%; height: 100%; opacity: 0.08; animation-delay: 0s; }
.ring-2 { width: 72%; height: 72%; opacity: 0.15; animation-delay: 0.8s; }
.ring-3 { width: 44%; height: 44%; opacity: 0.25; animation-delay: 1.6s; }

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: inherit; }
  50% { transform: scale(1.04); opacity: 0.4; }
}

.shield-core {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  background: var(--ns-surface);
  border: 1px solid var(--ns-cyan-glow);
  border-radius: 50%;
  width: 140px;
  height: 140px;
  justify-content: center;
  box-shadow: 0 0 40px var(--ns-cyan-dim), inset 0 0 30px var(--ns-cyan-dim);
}

.shield-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--ns-cyan);
}

/* ===== SECTION HEADER ===== */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--ns-cyan-glow);
  background: var(--ns-cyan-dim);
  color: var(--ns-cyan);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
}

/* ===== FEATURE CARDS ===== */
.feature-card {
  background: var(--ns-surface);
  border: 1px solid var(--ns-border);
  border-radius: 16px;
  padding: 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--ns-cyan-dim) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}
.feature-card:hover { border-color: var(--ns-cyan); transform: translateY(-4px); box-shadow: 0 12px 40px var(--ns-cyan-dim); }
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--ns-cyan-dim);
  border: 1px solid var(--ns-cyan-glow);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ns-cyan);
  margin-bottom: 20px;
}

/* ===== TESTIMONIALS ===== */
.proof-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 100%, var(--ns-cyan-dim), transparent);
  pointer-events: none;
}

.testimonial-card {
  background: var(--ns-surface);
  border: 1px solid var(--ns-border);
  border-radius: 16px;
  padding: 28px;
  transition: all 0.3s ease;
}
.testimonial-card:hover { border-color: var(--ns-border); transform: translateY(-2px); }
.testimonial-featured {
  border-color: var(--ns-cyan-glow);
  background: linear-gradient(135deg, var(--ns-surface) 0%, #0a1420 100%);
  box-shadow: 0 0 30px var(--ns-cyan-dim);
}

.stars { color: var(--ns-cyan); font-size: 14px; letter-spacing: 2px; }

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ns-cyan-dim);
  border: 1px solid var(--ns-cyan-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--ns-cyan);
  flex-shrink: 0;
}

.trust-bar {
  border: 1px solid var(--ns-border);
  border-radius: 16px;
  background: var(--ns-surface);
  padding: 24px;
}
.trust-item { text-align: center; padding: 12px; }

/* ===== CTA ===== */
.cta-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, var(--ns-cyan-dim) 0%, transparent 70%);
  pointer-events: none;
}

.cta-card {
  background: var(--ns-surface);
  border: 1px solid var(--ns-border);
  border-radius: 24px;
  padding: 64px 40px;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--ns-cyan), transparent);
}

/* ===== FOOTER ===== */
.footer-link {
  color: var(--ns-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--ns-cyan); }

/* ===== PRICING ===== */
.plan-card {
  background: var(--ns-surface);
  border: 1px solid var(--ns-border);
  border-radius: 20px;
  padding: 32px;
  position: relative;
  transition: all 0.3s ease;
}
.plan-card:hover { transform: translateY(-4px); }

.plan-featured {
  border-color: var(--ns-cyan);
  background: linear-gradient(160deg, #0d1a24 0%, var(--ns-surface) 100%);
  box-shadow: 0 0 50px var(--ns-cyan-dim);
}

.popular-badge {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ns-cyan);
  color: var(--ns-black);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 16px;
  border-radius: 0 0 10px 10px;
}

.plan-badge {
  display: inline-flex;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 6px;
  margin-bottom: 16px;
}
.free-badge { background: #1a2030; color: var(--ns-muted); border: 1px solid var(--ns-border); }
.pro-badge { background: var(--ns-cyan-dim); color: var(--ns-cyan); border: 1px solid var(--ns-cyan-glow); }
.biz-badge { background: #1a1a30; color: #a78bfa; border: 1px solid #3d2f7a; }

.plan-price { color: var(--ns-white); line-height: 1; }

.plan-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--ns-white);
}
.plan-feature.muted { color: var(--ns-muted); }
.check { color: var(--ns-cyan); font-size: 14px; flex-shrink: 0; }
.cross { color: var(--ns-muted); flex-shrink: 0; }

/* ===== BILLING TOGGLE ===== */
.billing-btn {
  cursor: pointer;
  transition: all 0.2s;
  color: var(--ns-muted);
  background: transparent;
  border: none;
  font-family: var(--ns-font);
}
.billing-btn.active {
  background: var(--ns-cyan);
  color: var(--ns-black);
  font-weight: 700;
}

/* ===== COMPARISON TABLE ===== */
.comparison-table {
  background: var(--ns-surface);
  border: 1px solid var(--ns-border);
  border-radius: 16px;
  overflow: hidden;
}
.comparison-table table { border-collapse: collapse; }
.table-row-hover:hover { background: var(--ns-surface-2); }

/* ===== FAQ ===== */
.faq-item {
  background: var(--ns-surface);
  border: 1px solid var(--ns-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item:has(.faq-answer.open) { border-color: var(--ns-cyan-glow); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--ns-white);
  font-family: var(--ns-font);
  font-size: 15px;
  font-weight: 500;
  gap: 12px;
}
.faq-question:hover { color: var(--ns-cyan); }

.faq-icon {
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--ns-muted);
}
.faq-answer.open + * .faq-icon,
.faq-question[data-open] .faq-icon { transform: rotate(180deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  color: var(--ns-muted);
  font-size: 14px;
  line-height: 1.7;
}
.faq-answer.open {
  max-height: 200px;
  padding: 0 24px 20px;
}

/* ===== UTILITY ANIMATIONS ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-fade-up { animation: fadeUp 0.6s ease forwards; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--ns-black); }
::-webkit-scrollbar-thumb { background: var(--ns-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ns-muted); }