:root{
  --bg: #0f1221;
  --card: #171a2b;
  --text: #e9ecf8;
  --muted: #b8bdd6;
  --accent: #7aa2ff;
  --table-border: #2a2f49;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  background: radial-gradient(1200px 600px at 60% -10%, rgba(122,162,255,.12), transparent 60%), var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Sidebar (left margin with links) */
.side-nav{
  position: fixed;
  inset: 0 auto 0 0;
  width: 240px;
  padding: 24px 16px;
  background: linear-gradient(180deg, #0e1120 0%, #0b0e1a 100%);
  border-right: 1px solid #11142a;
}
.side-nav__inner{
  position: sticky;
  top: 24px;
}
.nav-list{
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.nav-list a{
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  background: #14182a;
  border: 1px solid #161a2f;
  box-shadow: var(--shadow);
}
.nav-list a[aria-current="page"]{
  outline: 2px solid var(--accent);
}

/* Main content layout */
.content{
  margin-left: 260px; /* space for sidebar */
  padding: 36px 24px 80px;
  max-width: 1100px;
}

/* Header */
.header{
  margin-bottom: 18px;
}
.app-name{
  margin: 0 0 6px;
  font-size: clamp(28px, 4vw, 48px);
  letter-spacing: 0.3px;
}
.tagline{
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

/* Hero image */
.hero{
  margin: 22px 0 28px;
  background: var(--card);
  border: 1px solid #1c2040;
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero__image{
  width: 100%;
  height: auto;
  display: block;
}

/* Sections */
.description, .features{
  background: var(--card);
  border: 1px solid #1c2040;
  padding: 22px;
  border-radius: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.description h2, .features h2{
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.4rem;
}

/* Table */
.table-wrap{
  overflow: auto;
  border-radius: 12px;
}
.feature-table{
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}
.feature-table th, .feature-table td{
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--table-border);
}
.feature-table thead th{
  background: #1a1e36;
  position: sticky;
  top: 0;
  z-index: 1;
}
.feature-table tbody tr:hover{
  background: #141a31;
}

/* Footer */
.footer{
  text-align: center;
  color: var(--muted);
  margin-top: 22px;
}
.footer a{ color: var(--accent); text-decoration: none; }
.smallprint{ opacity: .8; font-size: .9rem; }

/* Responsive */
@media (max-width: 900px){
  .side-nav{ width: 200px; }
  .content{ margin-left: 220px; }
}
@media (max-width: 720px){
  .side-nav{
    position: static;
    width: 100%;
    border-right: 0;
    border-bottom: 1px solid #11142a;
  }
  .content{ margin-left: 0; padding-top: 20px; }
}

/* effect */
.neon-border {
  position: relative;
  display: inline-block;
  padding: 6px 12px;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  background: #111; /* dark base for contrast */
  overflow: hidden;
}

/* Moving neon border */
.neon-border::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(90deg, 
    #ff00ff, #00ffff, #ff00ff, #ffff00, #ff0000, #00ff00, #0000ff, #ff00ff);
  background-size: 400% 400%;
  border-radius: inherit;
  z-index: -1;
  animation: neonFlow 6s linear infinite;
}

/* Blur for glow effect */
.neon-border::after {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  background: inherit;
  border-radius: inherit;
  filter: blur(10px);
  z-index: -2;
  animation: neonFlow 6s linear infinite;
}

@keyframes neonFlow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.install-btn {
  display: flex;
  align-items: center;
  background: #4285f4; /* Google Chrome blue */
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.3s ease;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.install-btn:hover {
  background: #3367d6;
}