/* ============================================
   CoreDefender — Design System & Styles
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- CSS Variables --- */
:root {
  --bg-primary: #050a18;
  --bg-secondary: #0a1128;
  --bg-card: rgba(15, 25, 55, 0.6);
  --bg-glass: rgba(255,255,255,0.04);
  --text-primary: #e8ecf4;
  --text-secondary: #8a94a6;
  --accent: #00d4ff;
  --accent2: #00ff88;
  --accent-glow: rgba(0,212,255,0.3);
  --accent2-glow: rgba(0,255,136,0.2);
  --gradient-hero: linear-gradient(135deg, #050a18 0%, #0a1a3a 50%, #0d1f4a 100%);
  --gradient-accent: linear-gradient(135deg, #00d4ff, #00ff88);
  --gradient-btn: linear-gradient(135deg, #00d4ff 0%, #0090ff 100%);
  --border-color: rgba(255,255,255,0.06);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --transition: 0.3s cubic-bezier(.4,0,.2,1);
  --nav-height: 72px;
}

/* Light mode */
[data-theme="light"] {
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255,255,255,0.8);
  --bg-glass: rgba(255,255,255,0.6);
  --text-primary: #0a1128;
  --text-secondary: #5a6578;
  --border-color: rgba(0,0,0,0.08);
  --shadow: 0 8px 32px rgba(0,0,0,0.08);
  --gradient-hero: linear-gradient(135deg, #e8f0fe 0%, #f0f4f8 50%, #e0e8f5 100%);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; font-family: inherit; }

/* --- Utility --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; position: relative; }
.section-label {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 3px; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px; display: block;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; line-height: 1.15;
  margin-bottom: 20px;
}
.section-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; line-height: 1.7; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-header .section-subtitle { margin: 0 auto; }
.gradient-text { background: var(--gradient-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Glow dot */
.glow-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow); display: inline-block;
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 32px; border-radius: 60px; font-size: 0.95rem;
  font-weight: 600; transition: var(--transition); position: relative; overflow: hidden;
}
.btn-primary {
  background: var(--gradient-btn); color: #fff;
  box-shadow: 0 4px 24px rgba(0,150,255,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,150,255,0.5); }
.btn-secondary {
  background: var(--bg-glass); color: var(--text-primary);
  border: 1px solid var(--border-color); backdrop-filter: blur(12px);
}
.btn-secondary:hover { border-color: var(--accent); background: rgba(0,212,255,0.08); }
.btn-lg { padding: 18px 40px; font-size: 1.05rem; }

/* --- Navbar --- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height); display: flex; align-items: center;
  transition: var(--transition); padding: 0 24px;
}
.navbar.scrolled {
  background: rgba(5,10,24,0.85); backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
}
[data-theme="light"] .navbar.scrolled { background: rgba(255,255,255,0.85); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 800; }
.nav-logo svg { width: 36px; height: 36px; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); transition: var(--transition); }
.nav-links a:hover { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.theme-toggle {
  width: 40px; height: 40px; border-radius: 50%; background: var(--bg-glass);
  border: 1px solid var(--border-color); display: flex; align-items: center;
  justify-content: center; color: var(--text-secondary); transition: var(--transition);
  font-size: 1.1rem;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.mobile-toggle { display: none; background: none; color: var(--text-primary); font-size: 1.5rem; }

/* --- Hero --- */
.hero {
  min-height: 100vh; display: flex; align-items: center; position: relative;
  background: var(--gradient-hero); overflow: hidden; padding-top: var(--nav-height);
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 18px;
  border-radius: 60px; background: rgba(0,212,255,0.08); border: 1px solid rgba(0,212,255,0.2);
  font-size: 0.8rem; font-weight: 600; color: var(--accent); margin-bottom: 24px;
}
.hero h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 900; line-height: 1.08; margin-bottom: 24px; }
.hero p { font-size: 1.15rem; color: var(--text-secondary); max-width: 500px; margin-bottom: 36px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; }
.hero-stat h3 { font-size: 1.8rem; font-weight: 800; }
.hero-stat span { font-size: 0.8rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }

/* Hero Visual — Shield */
.hero-visual { display: flex; justify-content: center; align-items: center; position: relative; }
.shield-container { position: relative; width: 380px; height: 380px; }
.shield-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid rgba(0,212,255,0.15); animation: pulse-ring 3s ease-in-out infinite;
}
.shield-ring:nth-child(2) { inset: 24px; animation-delay: 0.5s; border-color: rgba(0,212,255,0.1); }
.shield-ring:nth-child(3) { inset: 48px; animation-delay: 1s; border-color: rgba(0,212,255,0.08); }
.shield-core {
  position: absolute; inset: 72px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.12) 0%, transparent 70%);
  display: flex; align-items: center; justify-content: center;
}
.shield-core svg { width: 100px; height: 100px; filter: drop-shadow(0 0 30px var(--accent-glow)); }
.orbit-dot {
  position: absolute; width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 16px var(--accent-glow);
}
.orbit-dot:nth-child(5) { top: 0; left: 50%; animation: orbit1 8s linear infinite; }
.orbit-dot:nth-child(6) { bottom: 20%; right: 0; animation: orbit2 10s linear infinite; }

/* Particle BG canvas */
#particles-canvas { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero .container { position: relative; z-index: 1; }

/* --- Features --- */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 36px 28px;
  transition: var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-accent); opacity: 0; transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(0,212,255,0.2); box-shadow: var(--shadow); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: rgba(0,212,255,0.08); display: flex; align-items: center;
  justify-content: center; margin-bottom: 20px; color: var(--accent); font-size: 1.4rem;
}
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }

/* --- Product Showcase --- */
.showcase-wrapper { position: relative; border-radius: var(--radius); overflow: hidden; }
.showcase-mockup {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 24px; backdrop-filter: blur(10px);
}
.mockup-topbar { display: flex; align-items: center; gap: 8px; margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border-color); }
.mockup-dot { width: 12px; height: 12px; border-radius: 50%; }
.mockup-dot:nth-child(1) { background: #ff5f57; }
.mockup-dot:nth-child(2) { background: #ffbd2e; }
.mockup-dot:nth-child(3) { background: #28ca42; }
.mockup-body { display: grid; grid-template-columns: 200px 1fr; gap: 24px; min-height: 360px; }
.mockup-sidebar { display: flex; flex-direction: column; gap: 4px; }
.mockup-sidebar-item {
  display: flex; align-items: center; gap: 12px; padding: 12px 16px;
  border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 500;
  color: var(--text-secondary); transition: var(--transition); cursor: default;
}
.mockup-sidebar-item.active { background: rgba(0,212,255,0.1); color: var(--accent); }
.mockup-main { display: flex; flex-direction: column; align-items: center; justify-content: center; }

/* Scan animation */
.scan-circle {
  width: 180px; height: 180px; border-radius: 50%; position: relative;
  display: flex; align-items: center; justify-content: center; margin-bottom: 24px;
}
.scan-circle svg { width: 180px; height: 180px; position: absolute; transform: rotate(-90deg); }
.scan-circle circle {
  fill: none; stroke-width: 4; stroke-linecap: round;
}
.scan-track { stroke: var(--border-color); }
.scan-progress { stroke: var(--accent); stroke-dasharray: 502; stroke-dashoffset: 502; transition: stroke-dashoffset 2s ease; }
.scan-circle.animating .scan-progress { stroke-dashoffset: 0; }
.scan-percent { font-size: 2.4rem; font-weight: 800; z-index: 1; }
.scan-label { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 20px; }
.scan-stats { display: flex; gap: 40px; }
.scan-stat { text-align: center; }
.scan-stat-val { font-size: 1.4rem; font-weight: 700; color: var(--accent); }
.scan-stat-label { font-size: 0.75rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }

/* --- Why Choose --- */
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.why-list { display: flex; flex-direction: column; gap: 24px; }
.why-item {
  display: flex; gap: 16px; padding: 20px; border-radius: var(--radius-sm);
  background: var(--bg-glass); border: 1px solid var(--border-color); transition: var(--transition);
}
.why-item:hover { border-color: rgba(0,212,255,0.2); }
.why-icon {
  min-width: 44px; height: 44px; border-radius: 12px;
  background: rgba(0,212,255,0.1); display: flex; align-items: center;
  justify-content: center; color: var(--accent); font-size: 1.2rem;
}
.why-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.why-item p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6; }

/* Comparison table */
.comparison-table { width: 100%; border-collapse: collapse; border-radius: var(--radius); overflow: hidden; }
.comparison-table th, .comparison-table td {
  padding: 14px 18px; text-align: center; font-size: 0.88rem; border-bottom: 1px solid var(--border-color);
}
.comparison-table th { background: rgba(0,212,255,0.06); font-weight: 700; font-size: 0.85rem; }
.comparison-table th:first-child, .comparison-table td:first-child { text-align: left; }
.comparison-table tr:last-child td { border-bottom: none; }
.check { color: var(--accent2); font-weight: 700; }
.cross { color: #ff5f57; font-weight: 700; }
.highlight-col { background: rgba(0,212,255,0.04); }

/* --- Download --- */
.download-section { background: var(--bg-secondary); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.download-card {
  max-width: 700px; margin: 0 auto; text-align: center;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 48px 40px; backdrop-filter: blur(10px);
}
.download-card .btn { margin-top: 24px; }
.download-meta { display: flex; justify-content: center; gap: 32px; margin-top: 24px; flex-wrap: wrap; }
.download-meta span { font-size: 0.8rem; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.verified-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 18px;
  border-radius: 60px; background: rgba(0,255,136,0.08); border: 1px solid rgba(0,255,136,0.2);
  color: var(--accent2); font-size: 0.8rem; font-weight: 600; margin-top: 20px;
}

/* --- Testimonials --- */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 32px 24px; transition: var(--transition);
}
.testimonial-card:hover { border-color: rgba(0,212,255,0.2); transform: translateY(-2px); }
.testimonial-stars { color: #ffbd2e; margin-bottom: 16px; font-size: 0.9rem; letter-spacing: 2px; }
.testimonial-card blockquote { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 40px; height: 40px; border-radius: 50%; background: var(--gradient-accent);
  display: flex; align-items: center; justify-content: center; font-weight: 700;
  font-size: 0.85rem; color: #050a18;
}
.testimonial-name { font-size: 0.88rem; font-weight: 600; }
.testimonial-role { font-size: 0.75rem; color: var(--text-secondary); }

/* --- Pricing --- */
.pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 800px; margin: 0 auto; }
.pricing-card {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius); padding: 40px 32px; position: relative; transition: var(--transition);
}
.pricing-card.featured { border-color: var(--accent); box-shadow: 0 0 40px rgba(0,212,255,0.1); }
.pricing-card.featured::before {
  content: 'COMING SOON'; position: absolute; top: 16px; right: 16px;
  background: var(--gradient-accent); color: #050a18; padding: 4px 14px;
  border-radius: 60px; font-size: 0.7rem; font-weight: 800;
}
.pricing-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.pricing-card .price { font-size: 2.8rem; font-weight: 900; margin-bottom: 4px; }
.pricing-card .price-sub { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 28px; }
.pricing-features { display: flex; flex-direction: column; gap: 12px; margin-bottom: 32px; }
.pricing-features li { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--text-secondary); }
.pricing-features li::before { content: '✓'; color: var(--accent2); font-weight: 700; }

/* --- FAQ --- */
.faq-list { max-width: 740px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: var(--radius-sm); overflow: hidden; transition: var(--transition);
}
.faq-item.active { border-color: rgba(0,212,255,0.2); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 20px 24px; background: none; color: var(--text-primary);
  font-size: 0.95rem; font-weight: 600; text-align: left; transition: var(--transition);
}
.faq-question span { transition: var(--transition); color: var(--text-secondary); }
.faq-item.active .faq-question span { transform: rotate(45deg); color: var(--accent); }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; }
.faq-item.active .faq-answer { max-height: 200px; padding: 0 24px 20px; }
.faq-answer p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* --- Footer --- */
.footer { background: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-brand p { color: var(--text-secondary); font-size: 0.88rem; margin-top: 16px; line-height: 1.7; max-width: 300px; }
.footer h4 { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 0.88rem; color: var(--text-secondary); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 32px; border-top: 1px solid var(--border-color);
}
.footer-bottom p { font-size: 0.8rem; color: var(--text-secondary); }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  width: 36px; height: 36px; border-radius: 50%; background: var(--bg-glass);
  border: 1px solid var(--border-color); display: flex; align-items: center;
  justify-content: center; color: var(--text-secondary); transition: var(--transition);
  font-size: 0.9rem;
}
.footer-socials a:hover { border-color: var(--accent); color: var(--accent); }

/* --- Animations --- */
@keyframes pulse-ring { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.04); } }
@keyframes orbit1 { 0% { transform: rotate(0deg) translateX(190px) rotate(0deg); } 100% { transform: rotate(360deg) translateX(190px) rotate(-360deg); } }
@keyframes orbit2 { 0% { transform: rotate(0deg) translateX(150px) rotate(0deg); } 100% { transform: rotate(-360deg) translateX(150px) rotate(360deg); } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Mobile nav overlay */
.mobile-nav {
  position: fixed; inset: 0; background: rgba(5,10,24,0.97); z-index: 999;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 24px; opacity: 0; pointer-events: none; transition: var(--transition);
}
.mobile-nav.open { opacity: 1; pointer-events: all; }
.mobile-nav a { font-size: 1.3rem; font-weight: 600; color: var(--text-primary); }
.mobile-nav-close { position: absolute; top: 20px; right: 24px; background: none; color: var(--text-primary); font-size: 1.8rem; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero p { margin: 0 auto 36px; }
  .hero-buttons { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .features-grid, .testimonials-grid, .pricing-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; align-items: center; }
  .shield-container { width: 280px; height: 280px; }
  .mockup-body { grid-template-columns: 1fr; }
  .mockup-sidebar { flex-direction: row; overflow-x: auto; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .download-card { padding: 32px 20px; }
  .comparison-table { font-size: 0.8rem; }
  .comparison-table th, .comparison-table td { padding: 10px 8px; }
}