/* =========================================================
   PXLNet Connect — stylesheet
   Design: dark tech, restrained blue/purple accent, dot-network motif
   ========================================================= */

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

:root{
  /* color */
  --bg: #08080d;
  --bg-elevated: #101018;
  --bg-elevated-hover: #15151f;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --text-primary: #f4f4f7;
  --text-secondary: #a3a3b0;
  --text-tertiary: #6b6b78;
  --accent-blue: #7c93ff;
  --accent-purple: #b48bfa;
  --accent-gradient: linear-gradient(120deg, var(--accent-blue), var(--accent-purple));
  --accent-wash: rgba(124,147,255,0.08);
  --success: #6ee7b7;

  /* type */
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* layout */
  --page-max: 1120px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  color-scheme: dark;
}

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

html{
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img{ max-width: 100%; display: block; }

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

h1, h2, h3, h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.01em;
}

p{ margin: 0; }

ul{ margin: 0; padding: 0; list-style: none; }

button{ font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

::selection{ background: var(--accent-blue); color: #08080d; }

:focus-visible{
  outline: 2px solid var(--accent-blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.container{
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.visually-hidden{
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ---------- ambient background ---------- */

#network-canvas{
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

.bg-glow{
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(560px 420px at 12% 8%, rgba(124,147,255,0.12), transparent 60%),
    radial-gradient(480px 380px at 88% 30%, rgba(180,139,250,0.10), transparent 60%);
}

main, header, footer{ position: relative; z-index: 1; }

/* ---------- header ---------- */

.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8,8,13,0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 68px;
}

.brand{
  display: flex;
  align-items: center;
  flex: none;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--text-primary);
  white-space: nowrap;
}

.brand img{ width: 26px; height: 26px; }

.brand .beta-badge{
  margin-left: 2px;
}

.nav-links{
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex: none;
}

.nav-links a{
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color 0.15s ease;
}

.nav-links a:hover{ color: var(--text-primary); }

.header-actions{
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: none;
}

.nav-toggle{
  display: none;
  width: 38px; height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.nav-toggle svg{ width: 18px; height: 18px; }

/* ---------- buttons ---------- */

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, background 0.15s ease;
  border: 1px solid transparent;
}

.btn svg{ width: 16px; height: 16px; flex: none; }

.btn-primary{
  background: var(--accent-gradient);
  color: #0a0a10;
  font-weight: 600;
  box-shadow: 0 1px 0 rgba(255,255,255,0.25) inset, 0 8px 24px -12px rgba(124,147,255,0.65);
}

.btn-primary:hover{
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.3) inset, 0 12px 28px -10px rgba(124,147,255,0.75);
}

.btn-secondary{
  background: var(--bg-elevated);
  border-color: var(--border);
  color: var(--text-primary);
}

.btn-secondary:hover{
  border-color: var(--border-strong);
  background: var(--bg-elevated-hover);
  transform: translateY(-1px);
}

.btn-ghost{
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}

.btn-ghost:hover{
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.btn-sm{ padding: 9px 16px; font-size: 13.5px; }
.btn-block{ width: 100%; }

/* ---------- badge ---------- */

.badge{
  display: inline-flex;
  align-items: center;
  flex: none;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.03em;
  white-space: nowrap;
  border: 1px solid var(--border-strong);
  color: var(--accent-blue);
  background: var(--accent-wash);
}

.badge .dot{
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(124,147,255,0.18);
}

/* ---------- hero ---------- */

.hero{
  padding: var(--space-8) 0 var(--space-7);
}

.hero-inner{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-6);
  align-items: center;
}

.hero-logo{
  display: flex;
  align-items: center;
}

.hero-logo img{
  width: 88px;
  height: 88px;
  filter: drop-shadow(0 12px 30px rgba(124,147,255,0.22));
}

.hero-divider{
  width: 1px;
  align-self: stretch;
  background: linear-gradient(180deg, transparent, var(--border-strong), transparent);
  margin: 0 var(--space-5) 0 0;
}

.hero-content{ max-width: 720px; min-width: 0; }

.eyebrow{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space-3);
}

.eyebrow-text{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.hero h1{
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  color: var(--text-primary);
}

.hero h1 .accent{
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle{
  margin-top: var(--space-3);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--text-secondary);
}

.hero-desc{
  margin-top: var(--space-3);
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
}

.hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.hero-protocols{
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-6);
}

.protocol-chip{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.protocol-chip svg{ width: 14px; height: 14px; color: var(--accent-blue); }

/* ---------- section shell ---------- */

section{
  padding: var(--space-7) 0;
  border-top: 1px solid var(--border);
}

.section-head{
  max-width: 640px;
  margin-bottom: var(--space-6);
}

.section-eyebrow{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: var(--space-2);
  display: block;
}

.section-head h2{
  font-size: clamp(1.7rem, 3vw, 2.2rem);
}

.section-head p{
  margin-top: var(--space-3);
  color: var(--text-secondary);
  font-size: 15.5px;
}

/* ---------- feature grid ---------- */

.feature-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.feature-grid > *{ min-width: 0; }

.feature-grid.cols-4{ grid-template-columns: repeat(4, 1fr); }

.feature-card{
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.feature-card:hover{
  transform: translateY(-3px);
  border-color: var(--border-strong);
  background: var(--bg-elevated-hover);
}

.feature-icon{
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-wash);
  border: 1px solid var(--border);
  margin-bottom: var(--space-4);
}

.feature-icon svg{
  width: 22px; height: 22px;
  color: var(--accent-blue);
}

.feature-card h3{
  font-size: 17px;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.feature-card p{
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ---------- subscription band ---------- */

.sub-band{
  border-top: 1px solid var(--border);
}

.sub-card{
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background:
    radial-gradient(600px 200px at 15% 0%, rgba(124,147,255,0.10), transparent 60%),
    radial-gradient(500px 220px at 90% 100%, rgba(180,139,250,0.10), transparent 60%),
    var(--bg-elevated);
  padding: var(--space-7) var(--space-6);
  text-align: center;
  overflow: hidden;
}

.sub-card::before{
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(120deg, rgba(124,147,255,0.35), transparent 40%, rgba(180,139,250,0.25));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.sub-card h2{
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  max-width: 620px;
  margin: 0 auto;
}

.sub-card p{
  margin: var(--space-4) auto 0;
  max-width: 560px;
  color: var(--text-secondary);
  font-size: 15.5px;
}

/* ---------- screenshots ---------- */

.screenshots-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.screenshot-frame{
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.screenshot-frame:hover{
  transform: translateY(-3px);
  border-color: var(--border-strong);
}

.screenshot-frame img{
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-frame figcaption{
  padding: var(--space-3) var(--space-3);
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  border-top: 1px solid var(--border);
}

.screenshot-placeholder{
  aspect-ratio: 9 / 18;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border-strong);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-2);
  color: var(--text-tertiary);
  padding: var(--space-4);
  text-align: center;
}

.screenshot-placeholder svg{ width: 28px; height: 28px; opacity: 0.6; }

.screenshot-placeholder span{ font-size: 13px; }

/* ---------- download ---------- */

.download-section .container{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-6);
  align-items: center;
}

.download-section .container > *{ min-width: 0; }

.download-panel{
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.download-panel .btn-primary{ margin-top: var(--space-4); }

.download-meta{
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.download-meta-item{
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.download-meta-item svg{ width: 15px; height: 15px; color: var(--accent-blue); }

.download-steps{
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.download-step{
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}

.download-step-index{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent-blue);
  flex: none;
  width: 22px;
}

.download-step p{ font-size: 13.5px; color: var(--text-secondary); flex: 1 1 auto; min-width: 0; }
.download-step strong{ color: var(--text-primary); font-weight: 500; display: block; margin-bottom: 2px; font-size: 14px; }

/* ---------- open source ---------- */

.oss-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: stretch;
}

.oss-grid > *{ min-width: 0; }

.oss-copy p{
  color: var(--text-secondary);
  font-size: 15.5px;
  margin-bottom: var(--space-3);
}

.oss-copy p:last-of-type{ margin-bottom: var(--space-5); }

.oss-actions{
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.oss-links{
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.link-card{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
}

.link-card:hover{
  border-color: var(--border-strong);
  background: var(--bg-elevated-hover);
  transform: translateX(2px);
}

.link-card-text strong{
  display: block;
  font-size: 14.5px;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 2px;
}

.link-card-text span{
  font-size: 13px;
  color: var(--text-tertiary);
}

.link-card-arrow{
  flex: none;
  width: 32px; height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: transform 0.15s ease, color 0.15s ease;
}

.link-card:hover .link-card-arrow{
  transform: translate(2px, -2px);
  color: var(--accent-blue);
}

.link-card-arrow svg{ width: 14px; height: 14px; }

/* ---------- resources ---------- */

.resources-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

/* ---------- footer ---------- */

.site-footer{
  border-top: 1px solid var(--border);
  padding: var(--space-6) 0 var(--space-5);
}

.footer-top{
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-6);
  padding-bottom: var(--space-5);
}

.footer-brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
}

.footer-brand img{ width: 22px; height: 22px; }

.footer-tagline{
  margin-top: var(--space-2);
  font-size: 13.5px;
  color: var(--text-tertiary);
  max-width: 300px;
}

.footer-links{
  display: flex;
  gap: var(--space-7);
}

.footer-col h4{
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.footer-col ul{
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a{
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.footer-col a:hover{ color: var(--text-primary); }

.footer-bottom{
  border-top: 1px solid var(--border);
  padding-top: var(--space-4);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-bottom p{
  font-size: 12.5px;
  color: var(--text-tertiary);
}

.footer-disclaimer{
  max-width: 640px;
}

/* ---------- reveal-on-scroll ---------- */

.reveal{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible{
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce){
  .reveal{ opacity: 1; transform: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 1340px){
  .nav-links{ display: none; }
  .nav-toggle{ display: flex; }
  .header-actions .btn-secondary{ display: none; }

  .hero-inner{ grid-template-columns: 1fr; }
  .hero-divider{ display: none; }
  .hero-logo img{ width: 64px; height: 64px; }

  .feature-grid, .feature-grid.cols-4{ grid-template-columns: repeat(2, 1fr); }
  .screenshots-grid{ grid-template-columns: repeat(2, 1fr); }
  .resources-grid{ grid-template-columns: 1fr; }
  .oss-grid{ grid-template-columns: 1fr; }
  .download-section .container{ grid-template-columns: 1fr; }

  .footer-top{ flex-direction: column; gap: var(--space-5); }
  .footer-links{ gap: var(--space-6); }
}

@media (max-width: 560px){
  .feature-grid, .feature-grid.cols-4{ grid-template-columns: 1fr; }
  .screenshots-grid{ grid-template-columns: 1fr; }
  .footer-links{ flex-wrap: wrap; gap: var(--space-5); }
  .hero{ padding: var(--space-6) 0 var(--space-6); }
  section{ padding: var(--space-6) 0; }
  .sub-card{ padding: var(--space-6) var(--space-4); }

  /* the primary CTA is already full-width at the top of the mobile drawer,
     so drop it from the header bar to give brand + toggle room to breathe */
  .header-actions .btn-primary{ display: none; }
  .brand span{ font-size: 15px; }
  .brand .beta-badge{ display: none; }

  /* long button labels can exceed very narrow screens (~320-360px) when
     kept on one line — let them wrap instead of pushing the page wide */
  .btn{ white-space: normal; text-align: center; max-width: 100%; }
}

/* ---------- mobile nav drawer ---------- */

.mobile-nav{
  position: fixed;
  inset: 68px 0 0 0;
  z-index: 40;
  background: #0a0a10;
  border-top: 1px solid var(--border);
  padding: var(--space-5) var(--space-4);
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  overflow-y: auto;
}

.mobile-nav.is-open{ display: flex; }

.mobile-nav a:not(.btn){
  padding: 14px var(--space-2);
  font-size: 16px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.mobile-nav .btn{ margin-top: var(--space-4); }