:root{
    --bg: #101214;
    --bg-soft: #0d0f10;
    --bg-panel: #16191c;
    --bg-panel-2: #1b1f22;
    --border: rgba(255,255,255,0.08);
    --border-strong: rgba(255,255,255,0.16);
    --text: #eef1f0;
    --muted: #8a938f;
    --accent: #6fbf9b;
    --accent-soft: rgba(111,191,155,0.16);
    --accent-secondary: #7a93a8;
    --danger: #e08585;
    --radius: 14px;
    --radius-sm: 9px;
    --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  }

  *{ box-sizing: border-box; }
  html,body{ margin:0; padding:0; }

  body{
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    min-height: 100vh;
    display:flex;
    flex-direction:column;
  }

  @media (prefers-reduced-motion: reduce){
    *{ animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  }

  /* ---------- header ---------- */
  header{
    position: relative;
    display:flex; align-items:center; justify-content:space-between;
    padding: 16px 22px;
    gap: 12px; flex-wrap: wrap;
  }
  header::after{
    content:"";
    position:absolute; left:0; right:0; bottom:0; height:1px;
    background: linear-gradient(to right, transparent, var(--border-strong) 20%, var(--border-strong) 80%, transparent);
  }
  .brand{
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.01em;
    display:flex; align-items:center; gap:9px;
  }
  .brand .titik{
    width:8px; height:8px; border-radius:50%;
    background: var(--muted);
    transition: background .35s ease, box-shadow .35s ease;
  }
  .brand .titik.aktif{ background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

  .kontrol{ display:flex; gap:8px; }
  button{
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px 16px;
    cursor: pointer;
    transition: border-color .15s ease, background .15s ease, transform .15s ease;
  }
  button:hover{ border-color: var(--border-strong); background: rgba(255,255,255,0.04); transform: translateY(-1px); }
  button:focus-visible{ outline: 2px solid var(--accent); outline-offset: 2px; }
  button.utama{
    background: var(--accent);
    color: #0b1a14;
    border-color: var(--accent);
    font-weight: 600;
  }
  button.utama:hover{ background: #83cbaa; border-color: #83cbaa; }
  button.bahaya{ border-color: rgba(224,133,133,0.4); color: var(--danger); }
  button.bahaya:hover{ border-color: var(--danger); background: rgba(224,133,133,0.1); }
  button:disabled{ opacity:0.4; cursor: not-allowed; transform:none; }

  /* ---------- gerbang / start screen ---------- */
  .gerbang{
    position: relative;
    flex: 1;
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    text-align:center; padding: 48px 20px; gap: 16px;
    max-width: 620px; margin: 0 auto;
    isolation: isolate;
  }
  .gerbang::before{
    content:"";
    position:absolute; top: 8%; left:50%; transform: translateX(-50%);
    width: 460px; height: 460px; max-width: 90vw;
    background: radial-gradient(circle, var(--accent-soft) 0%, transparent 68%);
    z-index:-1;
    pointer-events:none;
  }
  .gerbang .label-kecil{
    font-family: var(--font-mono); color: var(--accent); font-size: 12px;
    letter-spacing: 0.08em; text-transform: uppercase;
  }
  .gerbang h1{
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(26px, 4.6vw, 38px);
    line-height: 1.25;
    letter-spacing: -0.01em;
    margin: 0;
  }
  .gerbang p{ color: var(--muted); font-size: 15px; line-height: 1.65; margin:0; max-width: 460px; }
  .status-kecil{ font-family: var(--font-mono); font-size: 13px; min-height: 18px; color: var(--muted); }
  .status-kecil.galat{ color: var(--danger); }

  .tersembunyi{ display:none !important; }

  /* ---------- panel utama ---------- */
  main.panel-utama{
    flex:1;
    display:flex; gap: 18px; padding: 8px 18px 18px;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content:center;
  }
  .panel{
    position:relative;
    flex: 1 1 420px;
    max-width: 640px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
  }
  .panel::before{
    content:"";
    display:block;
    height: 2px;
    background: linear-gradient(to right, var(--accent-soft), transparent 70%);
  }
  .panel-label{
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 12px 14px 0 14px;
  }
  .kanvas-wrap{
    position: relative;
    margin: 10px;
    background: #000;
    border-radius: var(--radius-sm);
    overflow: hidden;
    line-height:0;
  }
  .kanvas-wrap canvas{ width: 100%; height:auto; display:block; background:#000; }

  /* ---------- footer ---------- */
  footer{
    display:flex; align-items:center; justify-content:center; gap:10px;
    padding: 10px 20px 20px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
    flex-wrap: wrap;
    text-align:center;
  }
  footer .pemisah{ opacity:0.5; }

  /* ---------- panel debug (info deteksi) ---------- */
  .panel-debug{
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.7;
    color: var(--muted);
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin: 0 18px 14px;
    padding: 12px 14px;
    white-space: pre-wrap;
  }
  .panel-debug b{ color: var(--accent); font-weight:600; }

  /* ---------- modal bantuan ---------- */
  .modal{
    position: fixed; inset:0; z-index: 50;
    background: rgba(8,10,11,0.7);
    display:flex; align-items:center; justify-content:center;
    padding: 20px;
  }
  .modal-isi{
    background: var(--bg-panel-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 26px;
    max-width: 460px; width:100%;
    max-height: 80vh; overflow:auto;
  }
  .modal-isi h2{
    font-family: var(--font-display); font-weight:700;
    font-size: 18px; margin: 0 0 16px 0; letter-spacing: -0.01em;
  }
  .modal-isi ul{ list-style:none; margin:0 0 20px 0; padding:0; display:flex; flex-direction:column; gap:10px; }
  .modal-isi li{
    font-size: 14px; line-height:1.5; color: var(--text);
    border-left: 2px solid var(--accent-soft); padding-left: 12px;
  }
  .modal-isi li b{ color: var(--accent); font-weight:600; }

  @media (max-width: 720px){
    main.panel-utama{ flex-direction: column; align-items: stretch; }
    .panel{ max-width: none; }
  }