*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --bg:    #07091a; --bg2: #0c0f22; --bg3: #101428;
      --card:  #111527; --border: #1e2340;
      --cyan:  #00d4ff; --green: #00ff88; --red: #ff4466; --orange: #ffaa00;
      --text:  #e8ecf4; --muted: #8892aa;
      --font:  'Inter', system-ui, sans-serif;
      --display: 'Space Grotesk', system-ui, sans-serif;
      --sidebar: 320px;
    }
    html, body { height: 100%; overflow: hidden; font-family: var(--font); background: var(--bg); color: var(--text); }

    /* ── TOPBAR ── */
    #topbar {
      position: fixed; top: 0; left: 0; right: 0; z-index: 1001;
      height: 56px; background: rgba(7,9,26,0.97);
      border-bottom: 1px solid var(--border);
      display: flex; align-items: center; padding: 0 1.25rem; gap: 1rem;
    }
    .tb-logo { display: flex; align-items: center; gap: 0.5rem; text-decoration: none; }
    .tb-logo svg { flex-shrink: 0; }
    .tb-logo-text { font-family: var(--display); font-size: 1rem; font-weight: 700; color: #fff; }
    .tb-logo-text span { color: var(--cyan); }
    .tb-sep { width: 1px; height: 24px; background: var(--border); }
    .tb-title { font-size: 0.88rem; font-weight: 600; color: var(--muted); letter-spacing: 0.04em; }
    .tb-back { margin-left: auto; color: var(--muted); font-size: 0.82rem; text-decoration: none; display: flex; align-items: center; gap: 0.4rem; transition: color 0.2s; }
    .tb-back:hover { color: var(--cyan); }

    /* ── LAYOUT ── */
    #layout { display: flex; height: 100%; padding-top: 56px; }

    /* ── SIDEBAR ── */
    #sidebar {
      width: var(--sidebar); flex-shrink: 0;
      background: var(--bg2); border-right: 1px solid var(--border);
      overflow-y: auto; display: flex; flex-direction: column;
      scrollbar-width: thin; scrollbar-color: var(--border) transparent;
    }
    #sidebar::-webkit-scrollbar { width: 4px; }
    #sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

    .sb-section { padding: 1.25rem; border-bottom: 1px solid var(--border); }
    .sb-label { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.75rem; }

    /* MODE TABS */
    .mode-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem; }
    .mode-tab {
      padding: 0.55rem 0.5rem; border-radius: 7px; font-size: 0.8rem; font-weight: 600;
      border: 1.5px solid var(--border); background: var(--bg3); color: var(--muted);
      cursor: pointer; transition: all 0.2s; text-align: center;
    }
    .mode-tab.active { background: rgba(0,212,255,0.1); border-color: var(--cyan); color: var(--cyan); }
    .mode-tab:hover:not(.active) { border-color: #2e3555; color: var(--text); }

    /* PANEL PAGES */
    .panel { display: none; flex-direction: column; gap: 0.9rem; }
    .panel.active { display: flex; }

    /* CONTROLS */
    .ctrl-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
    .ctrl-group { display: flex; flex-direction: column; gap: 0.35rem; }
    .ctrl-group label { font-size: 0.7rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
    .ctrl-group input, .ctrl-group select {
      background: var(--bg3); border: 1.5px solid var(--border); border-radius: 7px;
      color: var(--text); font-family: var(--font); font-size: 0.85rem; padding: 0.45rem 0.7rem;
      outline: none; transition: border-color 0.2s;
    }
    .ctrl-group input:focus, .ctrl-group select:focus { border-color: var(--cyan); }
    .ctrl-group select { appearance: none; cursor: pointer; }
    .ctrl-group select option { background: var(--bg2); }

    /* BUTTONS */
    .btn { display: flex; align-items: center; justify-content: center; gap: 0.4rem;
      padding: 0.55rem 1rem; border-radius: 7px; font-size: 0.82rem; font-weight: 600;
      cursor: pointer; border: none; transition: all 0.2s; width: 100%; }
    .btn-cyan  { background: linear-gradient(135deg, var(--cyan), #0099cc); color: #000; }
    .btn-green { background: linear-gradient(135deg, var(--green), #00b360); color: #000; }
    .btn-ghost { background: transparent; border: 1.5px solid var(--border); color: var(--muted); }
    .btn-danger { background: rgba(255,68,102,0.1); border: 1.5px solid rgba(255,68,102,0.3); color: var(--red); }
    .btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,0.3); }
    .btn:disabled { opacity: 0.4; cursor: not-allowed; }
    .btn-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }

    /* STATS GRID */
    .stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
    .stat-box { background: var(--bg3); border: 1px solid var(--border); border-radius: 8px; padding: 0.75rem; }
    .stat-box .sv { font-family: var(--display); font-size: 1.3rem; font-weight: 700; color: var(--cyan); line-height: 1; }
    .stat-box .sl { font-size: 0.68rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; margin-top: 0.2rem; }
    .stat-box.green .sv { color: var(--green); }
    .stat-box.orange .sv { color: var(--orange); }

    /* WAYPOINT LIST */
    #wp-list { display: flex; flex-direction: column; gap: 0.4rem; max-height: 220px; overflow-y: auto;
      scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
    .wp-item {
      display: flex; align-items: center; gap: 0.6rem;
      background: var(--bg3); border: 1px solid var(--border); border-radius: 7px;
      padding: 0.5rem 0.75rem; font-size: 0.78rem; transition: border-color 0.2s;
    }
    .wp-item:hover { border-color: rgba(0,212,255,0.3); }
    .wp-num { width: 22px; height: 22px; border-radius: 50%; background: var(--cyan); color: #000;
      font-weight: 700; font-size: 0.68rem; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
    .wp-coords { flex: 1; color: var(--muted); font-size: 0.72rem; line-height: 1.4; }
    .wp-del { background: none; border: none; color: var(--red); cursor: pointer; opacity: 0.6; padding: 2px; font-size: 0.9rem; transition: opacity 0.2s; }
    .wp-del:hover { opacity: 1; }
    .wp-empty { color: var(--muted); font-size: 0.82rem; text-align: center; padding: 1.5rem 0; }

    /* CURSOR HINT */
    #cursor-hint { padding: 0.6rem 1rem; margin: 0 1.25rem 0.5rem;
      background: rgba(0,212,255,0.06); border: 1px solid rgba(0,212,255,0.15);
      border-radius: 7px; font-size: 0.78rem; color: var(--cyan); text-align: center; }

    /* SPRAY STATUS BADGE */
    .status-badge { display: inline-flex; align-items: center; gap: 0.4rem;
      padding: 0.3rem 0.75rem; border-radius: 50px; font-size: 0.72rem; font-weight: 600; }
    .status-idle  { background: rgba(136,146,170,0.1); border: 1px solid rgba(136,146,170,0.2); color: var(--muted); }
    .status-ready { background: rgba(0,255,136,0.1); border: 1px solid rgba(0,255,136,0.2); color: var(--green); }
    .status-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

    /* ── MAP ── */
    #map { flex: 1; z-index: 1; }

    /* Leaflet overrides */
    .leaflet-container { background: #0c0f22; font-family: var(--font); }
    .leaflet-popup-content-wrapper { background: var(--card); border: 1px solid var(--border); border-radius: 10px; color: var(--text); box-shadow: 0 8px 32px rgba(0,0,0,0.6); }
    .leaflet-popup-tip { background: var(--card); }
    .leaflet-popup-content { margin: 12px 16px; font-size: 0.82rem; line-height: 1.6; }
    .leaflet-popup-content b { color: var(--cyan); }
    .leaflet-control-zoom a { background: var(--card) !important; color: var(--text) !important; border-color: var(--border) !important; }
    .leaflet-control-zoom a:hover { background: var(--bg3) !important; color: var(--cyan) !important; }

    /* WAYPOINT ICON */
    .wp-icon-inner { width: 30px; height: 30px; border-radius: 50% 50% 50% 0; transform: rotate(-45deg);
      display: flex; align-items: center; justify-content: center;
      background: var(--cyan); border: 2px solid #fff;
      font-size: 0.65rem; font-weight: 800; color: #000; box-shadow: 0 2px 8px rgba(0,212,255,0.5); }
    .wp-icon-inner span { transform: rotate(45deg); }
    .wp-icon-start { background: var(--green) !important; box-shadow: 0 2px 8px rgba(0,255,136,0.5) !important; }
    .wp-icon-end   { background: var(--red) !important;   box-shadow: 0 2px 8px rgba(255,68,102,0.5) !important; }

    /* FIELD VERTEX ICON */
    .fv-icon { width: 12px; height: 12px; border-radius: 50%; background: var(--orange); border: 2px solid #fff; }

    /* MAP OVERLAY HINT */
    #map-hint {
      position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
      z-index: 800; background: rgba(7,9,26,0.92); border: 1px solid var(--border);
      border-radius: 8px; padding: 0.5rem 1rem; font-size: 0.78rem; color: var(--muted);
      pointer-events: none; white-space: nowrap; backdrop-filter: blur(8px);
    }

    /* EXPORT TOAST */
    #toast {
      position: fixed; bottom: 2rem; right: 2rem; z-index: 9999;
      background: var(--card); border: 1px solid var(--green); border-radius: 10px;
      padding: 0.75rem 1.25rem; font-size: 0.85rem; color: var(--green);
      display: flex; align-items: center; gap: 0.5rem;
      transform: translateY(100px); opacity: 0; transition: all 0.3s;
    }
    #toast.show { transform: translateY(0); opacity: 1; }

    /* ── MOBILE ── */
    #mob-menu-btn-wp{display:none;}
    #mob-overlay-wp{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:498;backdrop-filter:blur(2px);}

    @media(max-width:768px){
      :root{--sidebar:85vw;}
      #layout{padding-top:0;position:relative;}
      #map{position:fixed!important;inset:0;height:100vh!important;width:100vw!important;z-index:1;}
      #sidebar{
        position:fixed;top:56px;left:0;bottom:0;
        width:var(--sidebar);max-width:320px;
        transform:translateX(-100%);
        transition:transform .3s ease;
        z-index:500;overflow-y:auto;
        border-right:1px solid var(--border);
        padding-bottom:env(safe-area-inset-bottom);
      }
      #sidebar.mob-open{transform:translateX(0);}
      #mob-overlay-wp{display:block;opacity:0;pointer-events:none;transition:opacity .3s;}
      #mob-overlay-wp.show{opacity:1;pointer-events:auto;}
      #mob-menu-btn-wp{
        display:flex;align-items:center;justify-content:center;
        position:fixed;top:68px;left:12px;z-index:600;
        width:42px;height:42px;border-radius:10px;
        background:rgba(7,9,26,.88);border:1px solid rgba(0,212,255,.35);
        color:#00d4ff;font-size:1.2rem;cursor:pointer;
        backdrop-filter:blur(8px);box-shadow:0 2px 12px rgba(0,0,0,.5);
      }
      .btn{min-height:40px;}
      #toast{bottom:80px;}
    }
    @media(max-width:420px){:root{--sidebar:92vw;}}