/* ==========================================================================
   SYMLEX VPN — CROSS-PLATFORM PROTOTYPE SHOWCASE
   Shared Design System & Verified Identity Stylesheet
   
   Presented & Verified by: ABIN S CHANDRAN
   Verification Token: ✓ VERIFIED PROTOTYPE
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@400;500;600;700;800&display=swap');

:root {
  /* Symlex Brand Color Tokens */
  --brand-blue: #027DF1;
  --brand-blue-hover: #0769C2;
  --brand-tint: #D6ECFF;
  --brand-light-tint: #F0F8FF;
  --brand-navy: #043563;
  --brand-deep-navy: #003580;
  
  /* Text & Surface Tokens */
  --text-primary: #0C0C0C;
  --text-heading: #141414;
  --text-secondary: #475467;
  --text-muted: #667085;
  --text-grey: #98A2B3;
  --text-on-dark: #FFFFFF;
  --text-on-dark-muted: #B8D4F0;

  /* Neutral Surfaces */
  --surface-page: #F8FAFC;
  --surface-card: #FFFFFF;
  --surface-alt: #F1F5F9;
  --surface-dark: #043563;
  --surface-deep: #021F3D;

  /* Borders & Dividers */
  --border-light: #E2E8F0;
  --border-card: #D0D5DD;
  --border-dark: #1A5A9A;
  --divider: #EAECF0;

  /* Semantic Status Tokens (Contrast-optimized) */
  --status-success: #067A12;
  --status-success-bg: #ECFDF3;
  --status-success-border: #A6F4C5;
  --status-error: #C62828;
  --status-error-bg: #FEECEB;
  --status-error-border: #FDA29B;
  --status-warning: #B54708;
  --status-warning-bg: #FEF0C7;
  --status-warning-border: #FEDF89;

  /* Radii & Shadows */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-btn: 10px;
  --radius-card: 16px;
  --radius-card-lg: 24px;
  --radius-pill: 9999px;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 8px -2px rgba(16, 24, 40, 0.1), 0 2px 4px -2px rgba(16, 24, 40, 0.06);
  --shadow-lg: 0 12px 24px -4px rgba(16, 24, 40, 0.12), 0 4px 6px -2px rgba(16, 24, 40, 0.05);
  --shadow-xl: 0 20px 32px -4px rgba(4, 53, 99, 0.2);

  /* Typography */
  --font-main: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  background-color: var(--surface-page);
  color: var(--text-primary);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==========================================================================
   VERIFIED PROTOTYPE IDENTITY BADGES (ABIN S CHANDRAN)
   ========================================================================== */
@keyframes nameBlink {
  0%, 100% {
    opacity: 1;
    filter: drop-shadow(0 0 10px rgba(2, 125, 241, 0.85)) drop-shadow(0 0 2px rgba(255, 255, 255, 0.9));
  }
  50% {
    opacity: 0.25;
    filter: none;
  }
}

@keyframes livePulseDot {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
    box-shadow: 0 0 8px #12B76A;
  }
  50% {
    transform: scale(0.7);
    opacity: 0.4;
    box-shadow: 0 0 2px #12B76A;
  }
}

.blinking-name {
  display: inline-block;
  white-space: nowrap;
  font-weight: 800;
  animation: nameBlink 1.4s ease-in-out infinite;
  letter-spacing: 0.2px;
}

.verified-badge-group {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(2, 125, 241, 0.08);
  border: 1px solid rgba(2, 125, 241, 0.35);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.verified-badge-group.dark {
  background: rgba(2, 125, 241, 0.18);
  border-color: rgba(214, 236, 255, 0.4);
  color: #FFFFFF;
}

.verified-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.5px;
  color: #027DF1;
  text-transform: uppercase;
  white-space: nowrap;
}

.verified-badge-group.dark .verified-tag {
  color: #D6ECFF;
}

.verified-presenter {
  font-weight: 600;
  color: var(--text-heading);
  border-left: 1px solid var(--border-light);
  padding-left: 10px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.verified-badge-group.dark .verified-presenter {
  color: #FFFFFF;
  border-left-color: rgba(255, 255, 255, 0.25);
}

.verified-presenter strong {
  color: #027DF1;
  font-weight: 800;
  display: inline-block;
  white-space: nowrap;
  animation: nameBlink 1.4s ease-in-out infinite;
}

.verified-badge-group.dark .verified-presenter strong {
  color: #60A5FA;
  animation: nameBlink 1.4s ease-in-out infinite;
}

/* Top Navbar Verified Pill */
.nav-verified-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #ECFDF3;
  border: 1px solid var(--status-success-border);
  color: var(--status-success);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-verified-pill .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--status-success);
  box-shadow: 0 0 6px var(--status-success);
  animation: livePulseDot 1.4s infinite ease-in-out;
}

/* ==========================================================================
   GLOBAL NAVIGATION HEADER
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.nav-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-shield {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand-text-group {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.4px;
  color: var(--brand-navy);
  line-height: 1.15;
}

.brand-sub {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-grey);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--brand-blue);
  background: var(--brand-light-tint);
}

.nav-link.active {
  color: var(--brand-blue);
  background: var(--brand-tint);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* ==========================================================================
   BUTTONS & CONTROLS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease;
  line-height: 1.3;
}

.btn-primary {
  background: var(--brand-blue);
  color: #FFFFFF;
  border-color: var(--brand-blue);
  box-shadow: 0 2px 4px rgba(2, 125, 241, 0.25);
}

.btn-primary:hover {
  background: var(--brand-blue-hover);
  border-color: var(--brand-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(2, 125, 241, 0.35);
}

.btn-secondary {
  background: #FFFFFF;
  color: var(--text-heading);
  border-color: var(--border-card);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--surface-alt);
  color: var(--brand-blue);
  border-color: var(--brand-blue);
  transform: translateY(-1px);
}

.btn-navy {
  background: var(--brand-deep-navy);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-navy:hover {
  background: #064580;
  transform: translateY(-1px);
}

.btn-outline-white {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #FFFFFF;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 12.5px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 26px;
  font-size: 15.5px;
  border-radius: var(--radius-btn);
}

/* ==========================================================================
   CONTAINERS & SECTION ARCHITECTURE
   ========================================================================== */
.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--brand-blue);
  margin-bottom: 12px;
}

.eyebrow.dark {
  color: var(--brand-tint);
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.6px;
  color: var(--text-heading);
  margin-bottom: 16px;
}

.section-title.dark {
  color: #FFFFFF;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.section-subtitle.dark {
  color: var(--text-on-dark-muted);
}

/* ==========================================================================
   PLATFORM SHOWCASE CARDS (4 VISUALLY DISTINCT TILES)
   ========================================================================== */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 28px;
}

.platform-card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.platform-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(2, 125, 241, 0.4);
}

.platform-preview-stage {
  height: 220px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border-light);
}

.platform-preview-stage.android {
  background: linear-gradient(135deg, #F0F8FF 0%, #E8F4FD 100%);
}

.platform-preview-stage.ios {
  background: linear-gradient(135deg, #F8FAFC 0%, #EDF2F7 100%);
}

.platform-preview-stage.tv {
  background: radial-gradient(circle at 50% 40%, #064985 0%, #043563 100%);
}

.platform-preview-stage.macos {
  background: linear-gradient(135deg, #F1F5F9 0%, #E2E8F0 100%);
}

.platform-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.platform-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.platform-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-heading);
}

.platform-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--brand-blue);
  background: var(--brand-light-tint);
  border: 1px solid var(--brand-tint);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.platform-design-system {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.platform-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 20px;
  flex: 1;
}

.platform-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  padding-top: 16px;
  border-top: 1px solid var(--divider);
  margin-bottom: 20px;
}

.platform-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.platform-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ==========================================================================
   INTERACTIVE VALIDATION CHECKLIST COMPONENT
   ========================================================================== */
.checklist-card {
  background: var(--surface-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.checklist-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.checklist-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface-page);
  border: 1px solid var(--border-light);
}

.check-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

.check-status-badge.passed {
  background: var(--status-success-bg);
  color: var(--status-success);
  border: 1px solid var(--status-success-border);
}

.check-status-badge.simulated {
  background: var(--brand-light-tint);
  color: var(--brand-blue);
  border: 1px solid var(--brand-tint);
}

/* ==========================================================================
   GLOBAL FOOTER & PRESENTATION ATTESTATION
   ========================================================================== */
.site-footer {
  background: #021F3D;
  color: #FFFFFF;
  padding: 64px 0 36px;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand p {
  color: var(--text-on-dark-muted);
  font-size: 14px;
  line-height: 1.6;
  margin: 16px 0 20px;
  max-width: 380px;
}

.footer-heading {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--brand-tint);
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-on-dark-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-verification-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-card);
  padding: 20px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 32px;
  font-size: 13px;
  color: #7FAEDB;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom a {
  color: #B8D4F0;
  text-decoration: none;
}

/* ==========================================================================
   RESPONSIVE UTILITIES
   ========================================================================== */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .section-title {
    font-size: 28px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}