:root {
    --color-primary: #00f5d4;
    --color-secondary: #9b5de5;
    --color-dark: #0f172a;
    --color-darker: #020617;
    --color-light: #f8fafc;
    --color-gray: #64748b;
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --shadow-glow: 0 0 20px rgba(0,245,212,0.3);
    --border-radius: 12px;
  }
  
  /* Global Reset + Background */
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  html, body {
    height: 100%;
    font-family: 'Inter', sans-serif;
    background-color: var(--color-darker) !important;
    background-image: none !important;
    color: var(--color-light);
    scroll-behavior: smooth;
  }
  
  /* Grid background overlay */
  .grid-bg {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(0,245,212,0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,245,212,0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    opacity: 0.5;
    z-index: 0;
  }
  
  /* Back button */
  .back-main {
    position: fixed;
    top: 1rem;
    left: 1rem;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-light);
    background: rgba(15,23,42,0.3);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--border-radius);
    backdrop-filter: blur(8px);
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.4);
    transition: background 0.3s ease, box-shadow 0.3s ease;
    z-index: 10;
  }
  .back-main::before {
    content: '← ';
    color: var(--color-light);
  }
  .back-main:hover {
    background: #358F4F;
    color: var(--color-light);
    box-shadow: 0 6px 14px rgba(53, 143, 79, 0.263);
  }
  
  /* Hero Section */
  .hero {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
    overflow: hidden;
    background-color: var(--color-darker);
    background-image:
      radial-gradient(ellipse at top, var(--color-dark), transparent 70%),
      radial-gradient(ellipse at bottom, var(--color-darker), transparent 70%);
  }
  .hero-bg {
    position: absolute; inset: 0;
    background:
      radial-gradient(circle at 30% 20%, rgba(155,93,229,0.15), transparent 40%),
      radial-gradient(circle at 70% 60%, rgba(0,245,212,0.15), transparent 40%);
    pointer-events: none;
    z-index: 0;
  }
  .hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 0 1rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s forwards ease-out;
  }
  @keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
  }
  .hero-logo {
    display: block;
    margin: 0 auto;
    width: 50vw;
    max-width: 450px;
    height: auto;
    filter: drop-shadow(0 0 12px rgba(0,245,212,0.5));
    animation: pulse 3s infinite alternate;
  }
  @keyframes pulse {
    0% { filter: drop-shadow(0 0 8px rgba(0,245,212,0.3)); }
    100% { filter: drop-shadow(0 0 18px rgba(0,245,212,0.7)); }
  }
  
  /* Tagline Pill */
  .tagline {
    font-family: 'Space Mono', monospace;
    font-size: 1.25rem;
    color: limegreen;
    display: inline-block;
    padding: 1rem 1.75rem;
    z-index: 2;
  }
  
  /* Explore More Button */
  .explore-more {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-light);
    text-decoration: none;
    font-weight: 500;
    z-index: 2;
  }
  .explore-more span {
    margin-bottom: 0.75rem;
    font-size: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }
  .explore-more .arrow-down {
    width: 0;
    height: 0;
    border-left: 12px solid transparent;
    border-right: 12px solid transparent;
    border-top: 16px solid var(--color-primary);
    animation: floatArrow 1.5s ease-in-out infinite;
  }
  @keyframes floatArrow {
    0%,100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
  }

  .explore-more span:hover {
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    transition: background 0.3s;
  }
  
  /* Labs Grid Section */
  .labs-section {
    padding: 5rem 2rem;
    background: var(--color-dark);
    position: relative;
    overflow: hidden;
  }
  .labs-section .grid-bg {
    position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(0,245,212,0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,245,212,0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
    pointer-events: none;
  }
  .section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
    z-index: 1;
  }
  .labs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px,1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
  }
  .labs-card {
    background: rgba(255,255,255,0.03);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--border-radius);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
    transition: transform 0.4s;
  }
  .labs-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0,245,212,0.3);
    box-shadow: var(--shadow-glow);
  }
  .labs-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.1), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
  }
  .labs-card:hover::before { opacity: 1; }
  .labs-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    text-shadow: 0 0 10px rgba(0,245,212,0.5);
  }
  .labs-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-primary);
  }
  .labs-card p {
    flex-grow: 1;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    color: rgba(248,250,252,0.8);
  }
  .card-footer { margin-top: auto; }
  .status {
    display: inline-block;
    padding: 0.35rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
  }
  .status.live { background: rgba(16,185,129,0.2); color: #10b981; border: 1px solid rgba(16,185,129,0.3); }
  .status.beta { background: rgba(249,115,22,0.2); color: #f97316; border: 1px solid rgba(249,115,22,0.3); }
  .status.soon { background: rgba(148,163,184,0.2); color: #94a3b8; border: 1px solid rgba(148,163,184,0.3); }
  .labs-card a {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    position: relative;
    padding: 0.5rem 0;
    transition: transform 0.2s;
  }
  .labs-card a::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 1px;
    bottom: 0;
    left: 0;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s;
  }
  .labs-card a:hover::after { transform: scaleX(1); transform-origin: bottom left; }
  
  /* Footer */
footer {
  padding: 1rem;
  text-align: center;
  font-size: 0.9rem;
  background: var(--color-darker);
  color: var(--color-light);
}
footer a {
  color: var(--color-light);
  text-decoration: none;
  margin: 0 0.5rem;
  font-weight: 400;
  transition: font-weight 0.2s ease;
}
footer a:hover {
  font-weight: 700;
}
footer p {
    margin: 1rem 0; /* match greater spacing from main site */
  }
  
/* Hero logo responsive */
.hero-logo {
    display: block;
    margin: 0 auto;
    /* fluid width with desktop cap */
    width: 50vw;
    max-width: 450px;
    height: auto;
    filter: drop-shadow(0 0 12px rgba(0,245,212,0.5));
    animation: pulse 3s infinite alternate;
  }
  @media (max-width: 768px) {
    .hero-logo {
      width: 80vw;
      max-width: none;
      margin: 0 auto;
    }
  }
  }
  @media (max-width: 480px) {
    .hero-logo {
      width: 95vw;
      max-width: none;
      margin: 0 auto;
    }
  }