:root {
    --bg:        #0a0a0a;
    --bg1:       #111111;
    --bg2:       #161616;
    --bg3:       #1c1c1c;
    --border:    #242424;
    --border2:   #2e2e2e;
    --text:      #d8d8d8;
    --text2:     #888;
    --text3:     #444;
    --green:     #4ade80;
    --green-dim: #1a3a28;
    --green-bg:  #0f2018;
    --blue:      #60a5fa;
    --blue-dim:  #1a2a3a;
    --amber:     #fbbf24;
    --red:       #f87171;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'Syne', sans-serif;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }

  body {
    font-family: var(--mono);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
  }

  /* ── beta banner ── */
  #beta-bar {
    background: linear-gradient(90deg, var(--green-bg), #0a1f14, var(--green-bg));
    border-bottom: 1px solid var(--green-dim);
    padding: 8px 24px;
    text-align: center;
    font-size: 11px;
    color: var(--green);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    position: sticky;
    top: 0;
    z-index: 100;
    animation: pulse-bar 4s ease-in-out infinite;
  }
  @keyframes pulse-bar {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
  }
  #beta-bar .dot {
    display: inline-block;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--green);
    margin-right: 8px;
    vertical-align: middle;
    box-shadow: 0 0 8px var(--green);
    animation: blink 1.5s ease-in-out infinite;
  }
  @keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

  /* ── layout ── */
  .container { max-width: 900px; margin: 0 auto; padding: 0 28px; }

  /* ── header ── */
  header {
    padding: 72px 0 56px;
    border-bottom: 1px solid var(--border);
    position: relative;
  }
  header::before {
    content: '';
    position: absolute;
    top: -60px; left: -60px;
    width: 420px; height: 280px;
    background: radial-gradient(ellipse, rgba(74,222,128,0.07) 0%, transparent 65%);
    pointer-events: none;
    z-index: 0;
  }
  header > * { position: relative; z-index: 1; }
  .logo-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
  }
  .logo-mark {
    font-family: var(--sans);
    font-size: 28px;
    font-weight: 800;
    color: var(--green);
    letter-spacing: -1px;
  }
  .beta-pill {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--amber);
    background: rgba(251,191,36,0.1);
    border: 1px solid rgba(251,191,36,0.3);
    padding: 3px 10px;
    border-radius: 20px;
  }
  h1 {
    font-family: var(--sans);
    font-size: clamp(28px, 5vw, 44px);
    font-weight: 800;
    line-height: 1.1;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -1px;
  }
  h1 .accent { color: var(--green); }
  .tagline {
    font-size: 14px;
    color: var(--text2);
    max-width: 520px;
    line-height: 1.7;
    margin-bottom: 32px;
  }
  .cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
  .btn-primary {
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 500;
    padding: 11px 22px;
    background: var(--green);
    color: #000;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
    letter-spacing: 0.5px;
  }
  .btn-primary:hover { background: #6ee89a; transform: translateY(-1px); }
  .btn-ghost {
    font-family: var(--mono);
    font-size: 12px;
    padding: 11px 22px;
    background: transparent;
    color: var(--text2);
    border: 1px solid var(--border2);
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
  }
  .btn-ghost:hover { border-color: var(--green); color: var(--text); }

  /* ── sections ── */
  section { padding: 56px 0; border-bottom: 1px solid var(--border); }
  section:last-child { border-bottom: none; }
  .section-label {
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text3);
    margin-bottom: 20px;
  }
  h2 {
    font-family: var(--sans);
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
  }
  p { font-size: 13px; color: var(--text2); line-height: 1.8; margin-bottom: 12px; }
  p:last-child { margin-bottom: 0; }

  /* ── what is this ── */
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
    margin-top: 28px;
  }
  .feature-card {
    background: var(--bg1);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 20px;
    transition: border-color 0.15s;
  }
  .feature-card:hover { border-color: var(--border2); }
  .feature-icon { font-size: 20px; margin-bottom: 12px; }
  .feature-title { font-size: 13px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
  .feature-desc { font-size: 11px; color: var(--text2); line-height: 1.6; }

  /* ── endpoints ── */
  .endpoint-list { display: flex; flex-direction: column; gap: 10px; margin-top: 20px; }
  .endpoint {
    background: var(--bg1);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
  }
  .endpoint-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    cursor: pointer;
    user-select: none;
  }
  .endpoint-header:hover { background: var(--bg2); }
  .method {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 3px 8px;
    border-radius: 3px;
    flex-shrink: 0;
  }
  .get  { background: rgba(96,165,250,0.15); color: var(--blue); border: 1px solid rgba(96,165,250,0.3); }
  .post { background: rgba(74,222,128,0.15); color: var(--green); border: 1px solid rgba(74,222,128,0.3); }
  .endpoint-path {
    font-size: 12px;
    color: var(--text);
    flex: 1;
    font-family: var(--mono);
  }
  .endpoint-desc { font-size: 11px; color: var(--text3); }
  .endpoint-body {
    display: none;
    padding: 0 16px 16px;
    border-top: 1px solid var(--border);
  }
  .endpoint-body.open { display: block; }
  .param-table { width: 100%; border-collapse: collapse; margin-top: 12px; }
  .param-table th {
    text-align: left; font-size: 9px; letter-spacing: 1px; text-transform: uppercase;
    color: var(--text3); padding: 6px 8px; border-bottom: 1px solid var(--border); font-weight: 400;
  }
  .param-table td { font-size: 11px; padding: 7px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
  .param-table tr:last-child td { border-bottom: none; }
  .param-name { color: var(--blue); font-family: var(--mono); }
  .param-type { color: var(--text3); font-family: var(--mono); font-size: 10px; }
  .param-desc { color: var(--text2); }
  .param-req  { color: var(--amber); font-size: 9px; }
  .param-opt  { color: var(--text3); font-size: 9px; }

  /* ── code block ── */
  .code-block {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 14px 16px;
    font-size: 11px;
    color: var(--green);
    overflow-x: auto;
    margin-top: 12px;
    white-space: pre;
    line-height: 1.6;
  }
  .code-block .dim  { color: var(--text3); }
  .code-block .key  { color: var(--blue); }
  .code-block .val  { color: var(--amber); }
  .code-block .str  { color: var(--green); }

  /* ── auth section ── */
  .auth-box {
    background: var(--bg1);
    border: 1px solid var(--border);
    border-left: 3px solid var(--green);
    border-radius: 6px;
    padding: 20px 24px;
    margin-top: 20px;
  }
  .auth-box .auth-title { font-size: 12px; color: var(--green); margin-bottom: 8px; font-weight: 500; }
  .auth-box p { font-size: 12px; }

  /* ── access section ── */
  .access-box {
    background: var(--green-bg);
    border: 1px solid var(--green-dim);
    border-radius: 8px;
    padding: 32px;
    margin-top: 24px;
    text-align: center;
  }
  .access-box .early-tag {
    display: inline-block;
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--amber);
    background: rgba(251,191,36,0.1);
    border: 1px solid rgba(251,191,36,0.3);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 16px;
  }
  .access-box h3 {
    font-family: var(--sans);
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
  }
  .access-box p { font-size: 13px; color: #6a8a6a; margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }
  .access-box .btn-primary { font-size: 13px; padding: 13px 28px; }
  .access-note { font-size: 10px; color: var(--text3); margin-top: 14px; }

  /* ── base url notice ── */
  .notice {
    background: var(--blue-dim);
    border: 1px solid rgba(96,165,250,0.2);
    border-radius: 6px;
    padding: 12px 16px;
    font-size: 11px;
    color: var(--blue);
    margin-bottom: 20px;
  }

  /* ── footer ── */
  footer {
    padding: 32px 0;
    font-size: 11px;
    color: var(--text3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
  }
  footer a { color: var(--text3); text-decoration: none; }
  footer a:hover { color: var(--text2); }

  /* ── TOC sidebar — hidden on mobile, shown on wide screens ── */
  .toc { display: none; }

  @media (min-width: 1100px) {
    .page-wrap {
      display: flex;
      gap: 48px;
      align-items: flex-start;
      max-width: 1160px;
      margin: 0 auto;
      padding: 0 28px;
    }
    .toc {
      display: block;
      width: 180px;
      flex-shrink: 0;
      position: sticky;
      top: 60px;
      padding-top: 56px;
    }
    .toc-title { font-size: 9px; letter-spacing: 2px; text-transform: uppercase; color: var(--text3); margin-bottom: 12px; }
    .toc a { display: block; font-size: 11px; color: var(--text3); text-decoration: none; padding: 4px 0; transition: color 0.1s; }
    .toc a:hover { color: var(--text2); }
    .toc a.active { color: var(--green); }
    .toc-divider { height: 1px; background: var(--border); margin: 8px 0; }
    .main-content { flex: 1; min-width: 0; }
    .container { max-width: 100%; padding: 0; }
  }

/* ── mobile ── */
@media (max-width: 640px) {
  #beta-bar { font-size: 10px; padding: 7px 12px; letter-spacing: 0.8px; }
  header { padding: 40px 0 36px; }
  .logo-mark { font-size: 22px; }
  h1 { font-size: 26px; letter-spacing: -0.5px; }
  .tagline { font-size: 13px; }
  .cta-row { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-ghost { text-align: center; padding: 13px 16px; font-size: 13px; }
  section { padding: 36px 0; }
  h2 { font-size: 18px; }
  .feature-grid { grid-template-columns: 1fr; gap: 8px; }
  .feature-card { padding: 16px; }
  .endpoint-path { font-size: 11px; word-break: break-all; }
  .endpoint-desc { display: none; }
  .code-block { font-size: 10px; padding: 12px; }
  .param-table { font-size: 10px; }
  .param-table th { font-size: 8px; }
  .access-box { padding: 24px 18px; }
  .access-box h3 { font-size: 17px; }
  .access-box p { font-size: 12px; }
  footer { flex-direction: column; gap: 6px; text-align: center; }
  .notice { font-size: 10px; }
  .container { padding: 0 18px; }
  .auth-box { padding: 16px 18px; }
}

@media (max-width: 400px) {
  h1 { font-size: 22px; }
  .logo-mark { font-size: 20px; }
  .beta-pill { font-size: 9px; padding: 2px 8px; }
  .endpoint-path { font-size: 10px; }
}