/* Cascade Layers */
@layer reset, base, layout, components, utilities;

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

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
  }

  body {
    min-block-size: 100vh;
    text-rendering: optimizeSpeed;
    line-height: 1.5;
  }

  img, svg {
    display: block;
    max-inline-size: 100%;
    block-size: auto;
  }

  input, button {
    font: inherit;
  }

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

@layer base {
  :root {
    /* Fonts */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', Courier, monospace;

    /* Theme Palette */
    --bg-color: #06090e;
    --text-color: #f1f5f9;
    --text-muted: #64748b;
    
    --color-cyan: #06b6d4;
    --color-cyan-glow: rgba(6, 182, 212, 0.18);
    --color-green: #10b981;
    --color-purple: #8b5cf6;
    
    --card-bg: rgba(15, 23, 42, 0.45);
    --card-border: rgba(255, 255, 255, 0.06);
    --card-hover-border: rgba(6, 182, 212, 0.35);

    --radius-lg: 12px;
    --radius-md: 8px;
    --transition-smooth: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  }

  body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    overflow-x: hidden;
    position: relative;
  }

  /* Grid style visual background texture */
  body::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    inline-size: 100%;
    block-size: 100%;
    background-image: 
      linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center;
    z-index: -2;
    pointer-events: none;
  }

  /* Subtle cyan ambient highlight */
  body::after {
    content: "";
    position: absolute;
    top: -20vh;
    left: 20vw;
    inline-size: 60vw;
    block-size: 60vw;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
    filter: blur(80px);
    z-index: -1;
    pointer-events: none;
  }

  h1, h2, h3 {
    font-weight: 600;
    letter-spacing: -0.5px;
    color: var(--text-color);
  }

  /* Focus rings accessibility */
  :focus-visible {
    outline: 2px solid var(--color-cyan);
    outline-offset: 4px;
  }
}

@layer layout {
  .dashboard {
    max-inline-size: 1000px;
    margin-inline: auto;
    padding: clamp(1.5rem, 3vw, 3.5rem);
    min-block-size: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }

  .main-content {
    margin-block-end: 4rem;
  }
}

@layer components {
  /* Dashboard Header */
  .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
    padding-block-end: 1.5rem;
    margin-block-end: 2.5rem;
  }

  .logo {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-cyan);
    letter-spacing: -0.5px;
  }

  .status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    padding: 6px 12px;
    border-radius: 50px;
  }

  .status-dot {
    inline-size: 8px;
    block-size: 8px;
    border-radius: 50%;
    background-color: var(--color-green);
    box-shadow: 0 0 8px var(--color-green);
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; transform: scale(1.1); }
  }

  /* Intro Section */
  .intro {
    margin-block-end: 3rem;
  }

  .title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-block-end: 0.75rem;
    line-height: 1.2;
  }

  .desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-inline-size: 600px;
  }

  /* Filter Controls */
  .filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-block-end: 2rem;
  }

  .filter-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-smooth);
  }

  .filter-btn:hover {
    color: var(--text-color);
    border-color: rgba(255, 255, 255, 0.15);
  }

  .filter-btn.active {
    background: var(--color-cyan-glow);
    border-color: var(--color-cyan);
    color: var(--color-cyan);
  }

  /* Labs Grid & Cards */
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
  }

  .card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-block-size: 200px;
    transition: var(--transition-smooth);
    backdrop-filter: blur(12px);
  }

  .card:hover {
    border-color: var(--card-hover-border);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.04);
  }

  /* Fade out animation class for filtering */
  .card.hide {
    display: none;
  }

  .card-top {
    margin-block-end: 1.5rem;
  }

  .card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-block-end: 1rem;
  }

  .card-type {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-cyan);
    background: rgba(6, 182, 212, 0.08);
    padding: 3px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 500;
  }

  .card-node {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
  }

  .card-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-block-end: 0.5rem;
  }

  .card-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
  }

  .card-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-block-start: 1rem;
  }

  .card-tags {
    display: flex;
    gap: 6px;
  }

  .tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
  }

  .card-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition-smooth);
  }

  .card-link:hover {
    color: var(--color-cyan);
  }

  .card-link svg {
    transition: transform 0.2s ease;
  }

  .card-link:hover svg {
    transform: translateX(3px);
  }

  /* Footer Section */
  .footer {
    border-top: 1px solid var(--card-border);
    padding-block-start: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
  }

  .footer-links {
    display: flex;
    gap: 1.5rem;
  }

  .footer-link {
    transition: var(--transition-smooth);
  }

  .footer-link:hover {
    color: var(--text-color);
  }
}

@layer utilities {
  /* System status details */
  .sys-info {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    gap: 16px;
  }

  /* Prefers Reduced Motion override */
  @media (prefers-reduced-motion: reduce) {
    .status-dot {
      animation: none;
    }
    .card:hover {
      transform: none !important;
    }
    .card-link:hover svg {
      transform: none !important;
    }
  }
}