@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600&family=Outfit:wght@300;400;600;700&display=swap');

  :root {
    --bg: #0a0b0f;
    --panel: #12141a;
    --panel-border: #1e2130;
    --text: #c8ccd4;
    --text-dim: #6b7080;
    --accent: #00e5a0;
    --accent-dim: #00e5a022;
    --warn: #ff6b4a;
    --info: #4a9eff;
    --gold: #ffc04a;
  }

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

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
    user-select: none;
  }

  /* ── Top bar ── */
  #topbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    background: var(--panel);
    border-bottom: 1px solid var(--panel-border);
    flex-shrink: 0;
    flex-wrap: wrap;
    z-index: 10;
  }

  .logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 14px;
    color: var(--accent);
    letter-spacing: 1px;
    text-transform: uppercase;
    white-space: nowrap;
    padding-right: 8px;
    border-right: 1px solid var(--panel-border);
  }

  .tb-select, .tb-input {
    background: var(--bg);
    border: 1px solid var(--panel-border);
    color: var(--text);
    font-family: inherit;
    font-size: 11px;
    padding: 4px 8px;
    border-radius: 3px;
    outline: none;
  }
  .tb-select:focus, .tb-input:focus { border-color: var(--accent); }

  .tb-btn {
    background: transparent;
    border: 1px solid var(--panel-border);
    color: var(--text);
    font-family: inherit;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
  }
  .tb-btn:hover { border-color: var(--accent); color: var(--accent); }
  .tb-btn.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }

  .tb-sep {
    width: 1px;
    height: 20px;
    background: var(--panel-border);
    flex-shrink: 0;
  }

  .tb-label {
    font-size: 10px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  /* ── Main area ── */
  #main {
    display: flex;
    flex: 1;
    overflow: hidden;
  }

  #viewport {
    flex: 1;
    position: relative;
  }

  #viewport canvas {
    display: block;
    width: 100%;
    height: 100%;
  }

  /* ── Right panel ── */
  #panel {
    width: 300px;
    background: var(--panel);
    border-left: 1px solid var(--panel-border);
    overflow-y: auto;
    flex-shrink: 0;
    font-size: 11px;
  }

  .panel-section {
    border-bottom: 1px solid var(--panel-border);
    padding: 10px 12px;
  }

  .panel-title {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim);
    margin-bottom: 8px;
  }

  .panel-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2px 0;
  }

  .panel-key { color: var(--text-dim); }
  .panel-val { color: var(--text); text-align: right; }

  .pq-slider { width: 80px; height: 14px; accent-color: var(--accent); cursor: pointer; }
  .pq-label { min-width: 28px; font-size: 11px; text-align: right; }
  .pq-slider.changed { accent-color: var(--gold, #ffcc00); }

  .badge {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 600;
  }
  .badge-info { background: #4a9eff22; color: var(--info); }

  .zone-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 0;
    border-bottom: 1px solid var(--panel-border);
  }
  .zone-item:last-child { border-bottom: none; }

  .zone-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
  }

  .zone-info { flex: 1; min-width: 0; }
  .zone-info small { color: var(--text-dim); display: block; }

  .zone-del {
    background: none;
    border: none;
    color: var(--warn);
    cursor: pointer;
    font-size: 14px;
    padding: 0 4px;
  }

  .btn {
    background: var(--accent);
    color: var(--bg);
    border: none;
    font-family: inherit;
    font-size: 11px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 3px;
    cursor: pointer;
    width: 100%;
    margin-top: 6px;
  }
  .btn:hover { opacity: 0.9; }
  .btn-outline {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
  }
  .panel-select {
    width: 100%;
    padding: 4px 6px;
    background: var(--bg-panel);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 11px;
    font-family: inherit;
    cursor: pointer;
  }
  .panel-select:focus { border-color: var(--accent); outline: none; }

  .waypoint-list {
    max-height: 200px;
    overflow-y: auto;
    font-size: 10px;
  }
  .waypoint-list div {
    padding: 2px 0;
    cursor: pointer;
    border-bottom: 1px solid var(--panel-border);
  }
  .waypoint-list div:hover { color: var(--accent); }

  /* ── Status bar ── */
  #statusbar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 4px 12px;
    background: var(--panel);
    border-top: 1px solid var(--panel-border);
    font-size: 10px;
    color: var(--text-dim);
    flex-shrink: 0;
  }

  #statusbar .val { color: var(--text); }

  /* ── Tooltip ── */
  #tooltip {
    position: absolute;
    background: var(--panel);
    border: 1px solid var(--panel-border);
    padding: 4px 8px;
    font-size: 10px;
    border-radius: 3px;
    pointer-events: none;
    display: none;
    z-index: 100;
    max-width: 250px;
  }

  /* ── Color legend ── */
  #color-legend {
    position: absolute;
    bottom: 8px;
    left: 8px;
    background: rgba(20, 22, 28, 0.88);
    border: 1px solid var(--panel-border);
    border-radius: 4px;
    padding: 6px 10px;
    font-size: 10px;
    z-index: 90;
    pointer-events: none;
    line-height: 1.6;
  }
  #color-legend .legend-title {
    color: var(--text-dim);
    font-weight: 600;
    margin-bottom: 2px;
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  #color-legend .legend-row {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  #color-legend .legend-swatch {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
  }
  #color-legend .legend-label {
    color: var(--text);
  }

  /* ── Loading overlay ── */
  #loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--accent);
    font-family: 'Outfit', sans-serif;
    font-size: 16px;
    z-index: 50;
  }

  /* Scrollbar */
  ::-webkit-scrollbar { width: 6px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 3px; }
  ::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

  /* ── Desktop: hide mobile-only elements, show touch help table only on touch ── */
  .mobile-only { display: none !important; }
  .touch-controls { display: none; }

  /* ── Toast notification ── */
  .toast {
    position: fixed;
    top: 50px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--panel);
    border: 1px solid var(--accent);
    color: var(--text);
    font-family: inherit;
    font-size: 12px;
    padding: 8px 16px;
    border-radius: 6px;
    z-index: 500;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
  }
  .toast.visible { opacity: 1; }

  /* ══════════════════════════════════════════════════════
     MOBILE RESPONSIVE — touch devices OR narrow viewports
     Uses (pointer: coarse) to catch landscape phones too
     ══════════════════════════════════════════════════════ */
  @media (max-width: 768px), (pointer: coarse), (max-width:950px) and (max-height:500px) {

    /* Show mobile-only elements */
    .mobile-only { display: block !important; }
    button.mobile-only { display: inline-flex !important; }

    /* Use dvh for full viewport on mobile browsers (address bar) */
    body { height: 100dvh; }

    /* ── Topbar: compact ── */
    #topbar {
      flex-wrap: nowrap;
      gap: 6px;
      padding: 6px 8px;
      overflow: hidden;
      z-index: 30;
    }
    /* Hide most toolbar items on mobile — only show logo, map select, hamburger */
    #topbar > .tb-label,
    #topbar > .tb-sep,
    #topbar > .tb-btn:not(#btnMenu),
    #topbar > #coordInput,
    #topbar > #locationSelect,
    #topbar > #flySpeedGroup,
    #topbar > #visualDistGroup,
    #topbar > #timeSlider,
    #topbar > #timeLabel {
      display: none !important;
    }
    #topbar .logo {
      font-size: 12px;
      padding-right: 6px;
      border-right: none;
    }
    #topbar #mapSelect {
      flex: 1;
      min-width: 0;
      font-size: 13px;
      padding: 6px 8px;
    }
    #btnMenu {
      min-width: 36px;
      min-height: 36px;
      font-size: 18px;
      display: inline-flex !important;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    /* ── Mobile slide-down menu ── */
    #mobileMenu {
      position: fixed;
      top: 48px;
      left: 0;
      right: 0;
      background: var(--panel);
      border-bottom: 1px solid var(--panel-border);
      z-index: 25;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
    }
    #mobileMenu.open {
      max-height: 80vh;
      overflow-y: auto;
    }
    .mm-group {
      padding: 8px 12px;
      border-bottom: 1px solid var(--panel-border);
    }
    .mm-group:last-child { border-bottom: none; }
    .mm-label {
      font-family: 'Outfit', sans-serif;
      font-size: 10px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: var(--text-dim);
      margin-bottom: 6px;
    }
    .mm-row {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      align-items: center;
    }
    .mm-row .tb-btn,
    .mm-row .mm-btn {
      display: inline-flex !important;
      min-height: 36px;
      padding: 6px 14px;
      font-size: 12px;
      align-items: center;
      justify-content: center;
      border-radius: 18px;
    }
    .mm-row input[type="range"] {
      height: 36px;
      flex: 1;
      min-width: 80px;
    }
    .mm-row .tb-select, .mm-row .tb-input {
      flex: 1;
      min-width: 0;
      font-size: 13px;
      padding: 8px 10px;
      min-height: 36px;
    }

    /* ── Mobile menu backdrop ── */
    #mobileMenuBackdrop {
      display: none !important;
      position: fixed;
      inset: 0;
      top: 48px;
      background: rgba(0, 0, 0, 0.5);
      z-index: 24;
    }
    #mobileMenuBackdrop.open { display: block !important; }

    /* ── Status bar: hidden ── */
    #statusbar { display: none; }

    /* ── Main area: fill viewport ── */
    #main { flex: 1; position: relative; }

    /* ── Prevent page reload, zoom, and text selection ── */
    html, body {
      touch-action: none;
      overscroll-behavior: none;
      -webkit-user-select: none;
      user-select: none;
      -webkit-touch-callout: none;
    }

    #viewport {
      position: absolute;
      inset: 0;
    }
    #viewport canvas { touch-action: none; }

    /* ── Right panel: slide-in drawer from right ── */
    #panel {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      width: 280px;
      z-index: 60;
      transform: translateX(100%);
      transition: transform 0.3s ease;
      border-left: 1px solid var(--panel-border);
    }
    #panel.panel-open {
      transform: translateX(0);
    }

    /* ── Panel backdrop (tap outside to close) ── */
    #panelBackdrop {
      display: none !important;
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.5);
      z-index: 55;
    }
    #panelBackdrop.open { display: block !important; }

    /* ── Panel toggle button (floating gear) ── */
    .panel-toggle-btn {
      display: flex !important;
      position: absolute;
      bottom: 16px;
      right: 16px;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--panel);
      border: 1px solid var(--panel-border);
      color: var(--text);
      font-size: 20px;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      z-index: 20;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
    }
    .panel-toggle-btn:active { background: var(--accent); color: var(--bg); }

    /* ── Touch targets: bigger buttons in panels ── */
    .panel-section .btn {
      min-height: 44px;
      font-size: 13px;
    }
    .panel-select {
      min-height: 44px;
      font-size: 13px;
      padding: 8px 10px;
    }

    /* ── Help overlay: show touch, hide desktop ── */
    .desktop-controls { display: none; }
    .touch-controls { display: table; }
    #help-overlay {
      min-width: 0;
      width: calc(100vw - 40px);
      max-width: 320px;
    }
  }