/* ==========================================================================
   zoogvpn.best - Linear / Luxury Indigo Glassmorphism Design System
   Pure Native CSS - Ultra Performance - Minimalist Modern SaaS
   ========================================================================== */

:root {
  --bg-primary: #080915;
  --bg-secondary: #0d0f22;
  --bg-card: rgba(20, 23, 50, 0.65);
  --bg-card-hover: rgba(28, 33, 70, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.04);
  
  --border-glass: rgba(255, 255, 255, 0.1);
  --border-focus: rgba(99, 102, 241, 0.6);
  --border-highlight: rgba(139, 92, 246, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;
  --accent-violet: #a855f7;
  --accent-pink: #ec4899;
  --accent-emerald: #10b981;

  --gradient-linear: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --gradient-btn: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-btn-hover: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --gradient-spotlight: radial-gradient(circle at 50% -20%, rgba(99, 102, 241, 0.3) 0%, rgba(139, 92, 246, 0.1) 40%, transparent 75%);

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 16px 36px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 10px 30px rgba(99, 102, 241, 0.35);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --container-width: 1200px;
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  background-image: var(--gradient-spotlight);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  min-height: 100vh;
}

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Header & Floating Navigation (Linear Style)
   ========================================================================== */
.header-wrapper {
  position: sticky;
  top: 16px;
  z-index: 1000;
  padding: 0 20px;
}

.site-header {
  background: rgba(13, 15, 34, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.brand-prism-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--gradient-linear);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.45);
}

.brand-prism-icon svg {
  width: 18px;
  height: 18px;
  fill: #ffffff;
}

.domain-highlight {
  background: var(--gradient-linear);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: 6px 4px;
}

.nav-link:hover, .nav-link.active {
  color: #ffffff;
}

.nav-badge-hot {
  background: var(--gradient-linear);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  margin-left: 4px;
  vertical-align: top;
}

.btn-header-cta {
  background: var(--gradient-btn);
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 9px 22px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-glow);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-header-cta:hover {
  background: var(--gradient-btn-hover);
  transform: translateY(-1px);
  box-shadow: 0 12px 36px rgba(99, 102, 241, 0.5);
}

/* ==========================================================================
   Buttons & Core Components
   ========================================================================== */
.btn-primary-linear {
  background: var(--gradient-btn);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  padding: 14px 34px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-glow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-fast);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary-linear:hover {
  background: var(--gradient-btn-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(99, 102, 241, 0.55);
}

.btn-secondary-glass {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
  border: 1px solid var(--border-glass);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 13px 30px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-fast);
  backdrop-filter: blur(10px);
}

.btn-secondary-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* Eyebrow Floating Pill */
.eyebrow-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(99, 102, 241, 0.12);
  color: #a5b4fc;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(99, 102, 241, 0.3);
  margin-bottom: 20px;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-indigo);
  box-shadow: 0 0 10px var(--accent-indigo);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 850;
  color: #ffffff;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-bottom: 44px;
}

.section-header-center {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}
.section-header-center .section-desc {
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   Hero Section (Centered Minimalist Luxury Glass)
   ========================================================================== */
.hero-linear {
  padding: 90px 0 80px;
  text-align: center;
  position: relative;
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.18;
  letter-spacing: -0.035em;
  max-width: 920px;
  margin: 0 auto 24px;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

/* Interactive Latency Radar Telemetry Widget */
.hero-telemetry-panel {
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 30px;
  box-shadow: var(--shadow-card);
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: 24px;
}

.telemetry-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

.telemetry-status-badge {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.telemetry-node-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  text-align: left;
  transition: all var(--transition-normal);
}

.telemetry-node-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-highlight);
  transform: translateY(-2px);
}

.node-loc-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.node-type-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.node-latency-val {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--accent-emerald);
  line-height: 1;
}

.node-ping-bar {
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  margin-top: 10px;
  overflow: hidden;
}

.node-ping-fill {
  height: 100%;
  background: var(--gradient-btn);
  border-radius: 2px;
}

/* ==========================================================================
   Section: Feature Grid (Frosted Glass Bento Cards)
   ========================================================================== */
.section-linear-features {
  padding: 90px 0;
}

.linear-bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.bento-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.bento-icon-linear {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 22px;
  color: var(--accent-purple);
}

.bento-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 12px;
}

.bento-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex-grow: 1;
}

/* ==========================================================================
   Section: Pricing (Luxury Glass Cards)
   ========================================================================== */
.section-linear-pricing {
  padding: 95px 0;
  position: relative;
}

.pricing-linear-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.price-card-glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 42px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.price-card-glass:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-card);
}

.price-card-glass.featured {
  background: rgba(30, 27, 75, 0.75);
  border: 1px solid rgba(168, 85, 247, 0.5);
  box-shadow: 0 20px 50px rgba(99, 102, 241, 0.25);
  transform: scale(1.02);
  z-index: 2;
}

.featured-pill-top {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-linear);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 14px rgba(168, 85, 247, 0.4);
  white-space: nowrap;
}

.price-tier-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.price-tier-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.price-tag-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 12px;
}

.price-currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: #ffffff;
}

.price-val {
  font-size: 3.2rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.price-billing-sub {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: 24px;
}

.price-features-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.price-features-col li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-primary);
}

.price-check-dot {
  color: var(--accent-purple);
  font-weight: 800;
}

.btn-price-action {
  width: 100%;
  padding: 13px;
  border-radius: var(--radius-full);
  font-size: 0.98rem;
  font-weight: 700;
  text-align: center;
  transition: var(--transition-fast);
  display: inline-block;
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid var(--border-glass);
}
.btn-price-action:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.price-card-glass.featured .btn-price-action {
  background: var(--gradient-btn);
  border: none;
  box-shadow: var(--shadow-glow);
}
.price-card-glass.featured .btn-price-action:hover {
  background: var(--gradient-btn-hover);
  transform: translateY(-2px);
}

/* ==========================================================================
   Section: FAQ (Glass Accordion)
   ========================================================================== */
.section-linear-faq {
  padding: 85px 0;
}

.faq-glass-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-glass-item {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-glass-item:hover {
  border-color: var(--border-highlight);
}

.faq-glass-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-glass-question::after {
  content: "→";
  font-size: 1.2rem;
  color: var(--accent-indigo);
  transition: transform 0.25s;
}

.faq-glass-item[open] .faq-glass-question::after {
  transform: rotate(90deg);
  color: var(--accent-purple);
}

.faq-glass-answer {
  padding: 0 24px 22px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ==========================================================================
   Footer (Strictly 4 Links Opening in New Tab)
   ========================================================================== */
.site-footer-linear {
  background: rgba(8, 9, 21, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 30px;
  margin-top: 80px;
  font-size: 0.9rem;
}

.footer-top-linear {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border-glass);
}

.footer-nav-4 {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.footer-nav-4 a {
  color: var(--text-secondary);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.footer-nav-4 a:hover {
  color: #ffffff;
}

.footer-bottom-linear {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Subpages Common Hero & Prose
   ========================================================================== */
.subpage-linear-banner {
  padding: 80px 0 50px;
  text-align: center;
  border-bottom: 1px solid var(--border-glass);
}

.subpage-linear-banner h1 {
  font-size: 2.5rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 12px;
}

.subpage-linear-banner p {
  font-size: 1.08rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.subpage-linear-content {
  padding: 60px 0 90px;
}

.article-glass-prose {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-primary);
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
}

.article-glass-prose h2 {
  font-size: 1.55rem;
  font-weight: 800;
  color: #ffffff;
  margin: 36px 0 16px;
}

.article-glass-prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin: 24px 0 12px;
}

.article-glass-prose p {
  margin-bottom: 18px;
  color: var(--text-secondary);
}

.article-glass-prose ul {
  list-style: disc;
  margin: 16px 0 24px 24px;
  color: var(--text-secondary);
}

.article-glass-prose li {
  margin-bottom: 8px;
}

.article-glass-prose strong {
  color: #ffffff;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.7rem;
  }
  .telemetry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .linear-bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-linear-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }
  .price-card-glass.featured {
    transform: none;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .hero-title {
    font-size: 2.1rem;
  }
  .telemetry-grid {
    grid-template-columns: 1fr;
  }
  .linear-bento-grid {
    grid-template-columns: 1fr;
  }
  .footer-top-linear, .footer-bottom-linear {
    flex-direction: column;
    align-items: flex-start;
  }
}