:root {
    --bg: #0a0a0a;
    --surface: #111111;
    --surface2: #1a1a1a;
    --border: #242424;
    --accent: #e8ff47;
    --accent2: #ff6b35;
    --text: #e8e4dc;
    --text-dim: #888880;
    --text-dimmer: #444440;
    --mono: 'DM Mono', monospace;
    --sans: 'Syne', sans-serif;
  }

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

  html { font-size: 16px; scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--mono);
    font-weight: 300;
    line-height: 1.75;
    min-height: 100vh;
    overflow-x: hidden;
  }

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,0,0,0.08) 2px,
      rgba(0,0,0,0.08) 4px
    );
    pointer-events: none;
    z-index: 100;
  }

  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2.5rem;
    background: rgba(10,10,10,0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
  }

  .logo {
    font-family: var(--sans);
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    color: var(--accent);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.15em;
  }
  .logo span { color: var(--text-dim); font-weight: 400; }

  .wrapper {
    max-width: 780px;
    margin: 0 auto;
    padding: 7rem 2rem 5rem;
  }

  .article-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
  }

  .tag {
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--bg);
    background: var(--accent);
    padding: 0.25em 0.75em;
    font-family: var(--mono);
    font-weight: 500;
  }

  .tag-outline {
    background: transparent;
    color: var(--accent2);
    border: 1px solid var(--accent2);
  }

  .meta-time {
    font-size: 0.72rem;
    color: var(--text-dimmer);
    letter-spacing: 0.05em;
  }

  h1 {
    font-family: var(--sans);
    font-weight: 800;
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 1.5rem;
  }

  h1 em {
    font-style: normal;
    color: var(--accent);
  }

  .perex {
    font-size: 1.05rem;
    color: var(--text-dim);
    line-height: 1.7;
    margin-bottom: 3rem;
    border-left: 2px solid var(--accent);
    padding-left: 1.25rem;
  }

  .divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 2.5rem 0;
    color: var(--text-dimmer);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
  }
  .divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
  }

  .article-body p {
    font-size: 0.97rem;
    line-height: 1.85;
    color: var(--text);
    margin-bottom: 1.5rem;
  }

  .article-body p strong {
    color: var(--accent);
    font-weight: 500;
  }

  .callout {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    padding: 1.5rem 1.75rem;
    margin: 2.5rem 0;
    position: relative;
  }

  .callout-label {
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.75rem;
  }

  .callout p {
    margin: 0 !important;
    font-size: 0.92rem !important;
    color: var(--text-dim) !important;
  }

  .signal-chain {
    display: flex;
    align-items: center;
    gap: 0;
    margin: 2.5rem 0;
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }

  .chain-block {
    background: var(--surface2);
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    text-align: center;
    min-width: 110px;
    flex-shrink: 0;
  }

  .chain-block .chain-label {
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dimmer);
    margin-bottom: 0.3rem;
  }

  .chain-block .chain-val {
    font-family: var(--sans);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent);
  }

  .chain-block.danger .chain-val { color: var(--accent2); }
  .chain-block.ok .chain-val { color: #4dff91; }

  .chain-arrow {
    color: var(--text-dimmer);
    font-size: 1.2rem;
    padding: 0 0.25rem;
    flex-shrink: 0;
  }

  .db-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.82rem;
  }

  .db-table th {
    text-align: left;
    padding: 0.5rem 1rem;
    font-size: 0.62rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-dimmer);
    border-bottom: 1px solid var(--border);
  }

  .db-table td {
    padding: 0.6rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    color: var(--text-dim);
  }

  .db-table td:first-child {
    color: var(--text);
    font-weight: 500;
  }

  .db-table tr:hover td { background: var(--surface); }

  .tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    margin: 2.5rem 0;
  }

  .tip-item {
    background: var(--surface);
    padding: 1.25rem;
  }

  .tip-num {
    font-family: var(--sans);
    font-weight: 800;
    font-size: 2rem;
    color: var(--text-dimmer);
    line-height: 1;
    margin-bottom: 0.5rem;
    letter-spacing: -0.04em;
  }

  .tip-text {
    font-size: 0.82rem;
    color: var(--text-dim);
    line-height: 1.5;
  }

  .tip-text strong { color: var(--accent); font-weight: 500; }

  h2 {
    font-family: var(--sans);
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
    color: var(--text);
    margin: 3rem 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  h2::before {
    content: '';
    display: block;
    width: 8px;
    height: 8px;
    background: var(--accent);
    flex-shrink: 0;
  }

  footer {
    border-top: 1px solid var(--border);
    padding: 2rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .footer-logo {
    font-family: var(--sans);
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--accent);
  }

  .footer-note {
    font-size: 0.7rem;
    color: var(--text-dimmer);
    letter-spacing: 0.05em;
  }

  .lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.72rem;
    color: var(--text-dim);
    letter-spacing: 0.08em;
    border: 1px solid var(--border);
    padding: 0.4em 0.9em;
    transition: all 0.2s;
  }
  .lang-switch:hover {
    border-color: var(--accent);
    color: var(--accent);
  }

  .waveform-deco {
    display: flex;
    align-items: center;
    gap: 3px;
    margin: 2rem 0;
  }
  .wave-bar {
    width: 3px;
    background: var(--accent);
    opacity: 0.3;
    animation: pulse-bar 1.4s ease-in-out infinite;
    border-radius: 1px;
  }
  .wave-bar:nth-child(1)  { height: 8px;  animation-delay: 0s; }
  .wave-bar:nth-child(2)  { height: 18px; animation-delay: 0.1s; }
  .wave-bar:nth-child(3)  { height: 30px; animation-delay: 0.2s; opacity: 0.5; }
  .wave-bar:nth-child(4)  { height: 20px; animation-delay: 0.3s; }
  .wave-bar:nth-child(5)  { height: 38px; animation-delay: 0.4s; opacity: 0.6; }
  .wave-bar:nth-child(6)  { height: 26px; animation-delay: 0.5s; }
  .wave-bar:nth-child(7)  { height: 42px; animation-delay: 0.6s; opacity: 0.7; }
  .wave-bar:nth-child(8)  { height: 28px; animation-delay: 0.7s; }
  .wave-bar:nth-child(9)  { height: 36px; animation-delay: 0.8s; opacity: 0.5; }
  .wave-bar:nth-child(10) { height: 18px; animation-delay: 0.9s; }
  .wave-bar:nth-child(11) { height: 10px; animation-delay: 1s; }
  .wave-bar:nth-child(12) { height: 22px; animation-delay: 1.1s; }
  .wave-bar.red { background: var(--accent2); }

  @keyframes pulse-bar {
    0%, 100% { opacity: 0.25; transform: scaleY(0.85); }
    50% { opacity: 0.7; transform: scaleY(1); }
  }

  @media (max-width: 600px) {
    nav { padding: 1rem 1.25rem; }
    .wrapper { padding: 5.5rem 1.25rem 3rem; }
    footer { padding: 1.5rem 1.25rem; }
  }