:root {
    /* Colors */
    --color-primary: #D9FF00; /* Neon Lime */
    --color-primary-dim: #b8d900;
    --color-bg: #0A0E0A; /* Forest Black */
    --color-bg-light: #181c18;
    --color-text: #FFFFFF;
    --color-text-muted: #A0A0A0;
    
    /* Typography */
    --font-main: 'Inter', sans-serif;
    --size-h1: 3.5rem;
    --size-sub: 1.125rem;
    --size-nav: 0.875rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    
    /* Borders & UI */
    --radius-btn: 100px;
    --radius-card: 24px;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

/* Background Noise Texture */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='https://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
}

/* Header */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.main-nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--size-nav);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.nav-link:hover {
    opacity: 1;
}

/* Hero Section */
.hero-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 var(--spacing-md) var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.hero-headline {
    font-size: var(--size-h1);
    font-weight: 800;
    line-height: 1.0;
    letter-spacing: -0.04em;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.text-highlight {
    color: var(--color-primary);
    text-shadow: 0 0 20px rgba(217, 255, 0, 0.3);
}

.hero-subheadline {
    font-size: var(--size-sub);
    color: var(--color-text-muted);
    max-width: 500px;
    margin-bottom: var(--spacing-lg);
}

/* Hero Image Area */
.hero-image-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto var(--spacing-lg);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.1);
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 1 / 1.1;
    object-fit: cover;
}

.glow-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(217, 255, 0, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    pointer-events: none;
    z-index: -1;
}

/* Service Details */
.service-details {
    margin-bottom: var(--spacing-lg);
    text-align: left;
    background: rgba(24, 28, 24, 0.6);
    padding: var(--spacing-md);
    border-radius: var(--radius-card);
    border: 1px solid rgba(255,255,255,0.05);
    backdrop-filter: blur(16px);
}

.feature-list {
    list-style: none;
    display: grid;
    gap: var(--spacing-sm);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.95rem;
    color: rgba(255,255,255,0.9);
}

.feature-list iconify-icon {
    color: var(--color-primary);
    font-size: 1.2rem;
}

/* Bottom Actions */
.hero-actions-container {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.price-tag {
    font-size: 0.8rem;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: 4px 12px;
    border-radius: 100px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-btn);
    border: none;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: transform 0.2s, filter 0.2s;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

.btn-primary {
    background-color: var(--color-primary);
    color: #000;
}

.btn-secondary {
    background-color: var(--color-bg-light);
    color: var(--color-text);
    border: 1px solid rgba(255,255,255,0.2);
}

.btn-icon {
    font-size: 1.2rem;
}

.contact-info {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.contact-info .highlight {
    color: var(--color-text);
    font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --size-h1: 2.25rem;
        --spacing-lg: 2.5rem;
    }
    
    .site-header {
        padding: var(--spacing-md);
    }
    
    .main-nav {
        display: none; /* Hide nav on mobile for simplicity/cleanliness per ref */
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-image-container {
        max-width: 100%;
    }
}

.price-tag .price-sub{display:inline-block;font-size:0.85em;opacity:0.85;letter-spacing:0.12em;}

.price-tag{display:flex;flex-direction:column;align-items:center;gap:0.35em;}
.price-tag .price-line{display:block;line-height:1.05;}
.price-tag .price-sub{font-size:0.85em;opacity:0.9;letter-spacing:0.14em;}

.price-tags{
  display:flex;
  justify-content:center;
  gap: 14px;
  margin-bottom: 18px;
}

.hero-section{position:relative; overflow:hidden;}
.bg-logo{
  position:absolute;
  right:-120px;
  top:50%;
  transform:translateY(-50%);
  width:min(520px, 65vw);
  opacity:0.10;
  filter: blur(0.2px);
  pointer-events:none;
  user-select:none;
  mix-blend-mode: screen;
}

.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:44px;height:44px;border-radius:999px;
  background: rgba(0,0,0,0.65);
  border: 1px solid rgba(255,255,255,0.18);
  display:flex;align-items:center;justify-content:center;
  box-shadow: 0 8px 30px rgba(0,0,0,0.45);
}
.brand-mark svg{display:block}

.brand-mark{
  width:44px;height:44px;border-radius:999px;
  overflow:hidden;
  background: rgba(0,0,0,0.65);
  border: 1px solid rgba(255,255,255,0.18);
  display:flex;align-items:center;justify-content:center;
  box-shadow: 0 8px 30px rgba(0,0,0,0.45);
}
.brand-logo{
  width:70%;
  height:70%;
  object-fit:contain;
  filter: grayscale(1) brightness(3);
}

/* --- logo fix: remove square + match dark background --- */
.brand-logo{
  width:72%;
  height:72%;
  object-fit:cover;
  border-radius:999px;
  background: transparent;
  filter: grayscale(1) brightness(5) contrast(1.2);
  mix-blend-mode: screen;
}

/* --- clean logo badge (PNG with transparency) --- */
.brand-mark{
  width:44px;
  height:44px;
  border-radius:999px;
  overflow:hidden;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.18);
  display:flex;
  align-items:center;
  justify-content:center;
}

.brand-logo{
  width:72%;
  height:72%;
  object-fit:contain;
  border-radius:0;
  filter:none;
  mix-blend-mode:normal;
}

/* prevent image hover/drag UI overlays */
.hero-image{
  -webkit-user-drag: none;
  user-select: none;
  -webkit-user-select: none;
  pointer-events: none;
}

/* Tube flow effect: animated highlight masked by the hero image */
.hero-image-container{
  position: relative;
  overflow: hidden;
}

.hero-image{
  display: block;
  width: 100%;
  height: auto;
}

/* layer that animates, but is masked by the image itself */
.hero-image-container::after{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;

  /* moving highlight */
  background:
    linear-gradient(110deg,
      rgba(0,0,0,0) 0%,
      rgba(0,255,170,0.0) 35%,
      rgba(0,255,170,0.85) 50%,
      rgba(0,255,170,0.0) 65%,
      rgba(0,0,0,0) 100%);
  background-size: 220% 220%;
  animation: tubeFlow 2.4s linear infinite;

  mix-blend-mode: screen;
  opacity: .9;
  filter: blur(0.6px);

  /* mask by the same image so effect shows mainly on bright areas (tubes) */
  -webkit-mask-image: url("server_node_hero.png");
  -webkit-mask-size: cover;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;

          mask-image: url("server_node_hero.png");
          mask-size: cover;
          mask-repeat: no-repeat;
          mask-position: center;
}

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

@media (prefers-reduced-motion: reduce){
  .hero-image-container::after{ animation: none; }
}

/* Language switch (EN/RU) */
.lang-switch{
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 9999;
  display: inline-flex;
  gap: 10px;
  padding: 10px;
  border-radius: 999px;
  background: rgba(0,0,0,.35);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.12);
}

.lang-link{
  text-decoration: none;
  border: 1px solid rgba(255,255,255,.22);
  color: rgba(255,255,255,.9);
  border-radius: 999px;
  padding: 8px 12px;
  font: inherit;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.lang-link.is-active{
  background: rgba(255,255,255,.14);
  border-color: rgba(255,255,255,.35);
}

.lang-link:visited{
  color: rgba(255,255,255,.9);
}

/* RU subtitle alignment tweak */
.hero-subheadline{
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  max-width: 62ch;
}

/* RU subtitle centering fix */
html[lang="ru"] .hero-content{
  text-align: center;
}

html[lang="ru"] .hero-subheadline{
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* Disable old tubeFlow overlay (replace with calmer effects below) */
.hero-image-container::after{
  content: none !important;
  animation: none !important;
  background: none !important;
  -webkit-mask-image: none !important;
          mask-image: none !important;
}

/* Calm neon breathing on the hero image */
.hero-image{
  animation: heroNeonBreathe 7.5s ease-in-out infinite;
  will-change: filter;
}

@keyframes heroNeonBreathe{
  0%,100% { filter: brightness(1) saturate(1) drop-shadow(0 0 0 rgba(0,255,160,0)); }
  50%     { filter: brightness(1.30) saturate(1.90) drop-shadow(0 0 46px rgba(0,255,160,.55)) drop-shadow(0 0 110px rgba(0,255,160,.95)); }
}

/* Rare soft impulse sweep (very subtle) */
.hero-image-container::before{
  content: "";
  position: absolute;
  inset: -25%;
  pointer-events: none;

  background: radial-gradient(
    circle at 30% 40%,
    rgba(0,255,160,.55),
    rgba(0,255,160,0) 55%
  );

  mix-blend-mode: screen;
  opacity: 0;
  filter: blur(16px);
  transform: translate3d(-18%, 0, 0);

  animation: heroImpulse 6s ease-in-out infinite;
}

@keyframes heroImpulse{
  0%   { opacity: 0;   transform: translate3d(-22%, 0, 0); }
  12%  { opacity: .95; }
  22%  { opacity: 0;   transform: translate3d(22%, 0, 0); }
  100% { opacity: 0;   transform: translate3d(22%, 0, 0); }
}

@media (prefers-reduced-motion: reduce){
  .hero-image{ animation: none; }
  .hero-image-container::before{ animation: none; opacity: 0; }
}

/* Ensure overlays can render correctly */
.hero-image-container{
  position: relative !important;
  overflow: hidden !important;
}

.hero-image{
  position: relative;
  z-index: 1;
}

.hero-image-container::before{
  z-index: 2;
}