:root {
    --bg: #1a2233;
    --bg2: #1e2840;
    --bg3: #243050;
    --panel: #1c2538;
    --border: #2e3f5c;
    --accent: #4a8fd4;
    --accent2: #3a7bc8;
    --text: #c8d4e8;
    --text2: #8a9bb8;
    --text3: #5a6b88;
    --hover: #2a3a58;
    --select: #1e3a5f;
    --font-size: 12px;
    --font: 'Consolas', 'Courier New', monospace;
    --menuH: 28px;
    --resizer: 4px;
  }
  .light {
    --bg: #e8eaed;
    --bg2: #dddfe3;
    --bg3: #d2d5da;
    --panel: #e0e2e6;
    --border: #b0b5be;
    --accent: #2a6aaf;
    --accent2: #1f5a9f;
    --text: #1a1e28;
    --text2: #3a4458;
    --text3: #6a7888;
    --hover: #cdd0d5;
    --select: #b8d0ea;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; user-select: none; }
  body { background: var(--bg); color: var(--text); font-family: var(--font); font-size: var(--font-size); overflow: hidden; height: 100vh; display: flex; flex-direction: column; }

  /* MENU BAR */
  #menubar {
    height: var(--menuH);
    min-height: var(--menuH);
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 1px;
    padding: 0 4px;
    z-index: 1000;
  }
  .menu-btn {
    height: 22px;
    padding: 0 8px;
    background: transparent;
    border: none;
    color: var(--text);
    font-family: var(--font);
    font-size: var(--font-size);
    cursor: pointer;
    letter-spacing: 0.02em;
    border-radius: 2px;
    transition: background 0.1s;
  }
  .menu-btn:hover, .menu-btn.active { background: var(--hover); }
  .menu-spacer { flex: 1; }

  /* DARK MODE TOGGLE */
  #themeToggle {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-right: 4px;
  }
  #themeToggle span { font-size: 10px; color: var(--text2); }
  .toggle-switch {
    width: 32px; height: 16px;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 8px;
    position: relative;
    cursor: pointer;
    transition: background 0.2s;
  }
  .toggle-switch.on { background: var(--accent2); }
  .toggle-knob {
    width: 12px; height: 12px;
    background: var(--text2);
    border-radius: 50%;
    position: absolute;
    top: 1px; left: 1px;
    transition: left 0.2s, background 0.2s;
  }
  .toggle-switch.on .toggle-knob { left: 17px; background: #fff; }

  /* DROPDOWN MENUS */
  .dropdown {
    position: absolute;
    top: var(--menuH);
    background: var(--bg2);
    border: 1px solid var(--border);
    min-width: 160px;
    z-index: 2000;
    display: none;
    box-shadow: 4px 4px 12px rgba(0,0,0,0.4);
  }
  .dropdown.visible { display: block; }
  .dd-item {
    padding: 4px 16px 4px 10px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    color: var(--text);
  }
  .dd-item:hover { background: var(--hover); color: var(--accent); }
  .dd-sep { height: 1px; background: var(--border); margin: 2px 0; }
  .dd-kbd { color: var(--text3); font-size: 10px; }

  /* MAIN AREA */
  #main { flex: 1; display: flex; overflow: hidden; }

  /* PANELS */
  .side-panel {
    background: var(--panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
    position: relative;
  }
  #rightPanel { border-right: none; border-left: 1px solid var(--border); }
  .panel-header {
    height: 22px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 6px;
    gap: 4px;
    font-size: 10px;
    color: var(--text2);
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }
  .panel-title { flex: 1; }
  .close-btn {
    width: 14px; height: 14px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text2);
    cursor: pointer;
    font-size: 9px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 1px;
    line-height: 1;
    font-family: var(--font);
  }
  .close-btn:hover { background: var(--hover); color: var(--text); border-color: var(--accent); }
  .panel-content { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 4px; }
  .panel-hidden { display: none !important; }

  /* RESIZER */
  .resizer {
    width: var(--resizer);
    background: var(--border);
    cursor: col-resize;
    transition: background 0.1s;
    flex-shrink: 0;
  }
  .resizer:hover, .resizer.dragging { background: var(--accent); }
  .resizer-h {
    height: var(--resizer);
    width: 100%;
    cursor: row-resize;
    background: var(--border);
    flex-shrink: 0;
  }
  .resizer-h:hover, .resizer-h.dragging { background: var(--accent); }

  /* VIEWPORT */
  #viewportArea {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 100px;
  }
  #viewport {
    flex: 1;
    position: relative;
    overflow: hidden;
    cursor: default;
  }
  #viewport canvas { display: block; }
  #viewport.selecting { cursor: crosshair; }

  /* SELECTION BOX */
  #selBox {
    position: absolute;
    border: 1px solid var(--accent);
    background: rgba(74,143,212,0.08);
    pointer-events: none;
    display: none;
    z-index: 10;
  }

  /* BOTTOM PANEL */
  #bottomContainer { display: flex; flex-direction: column; }
  #bottomPanel {
    background: var(--panel);
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }
  #bottomPanel .panel-content { font-size: 10px; color: var(--text2); }

  /* STATUS BAR */
  #statusbar {
    height: 18px;
    background: var(--bg2);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 8px;
    font-size: 10px;
    color: var(--text3);
    gap: 16px;
  }
  .status-item { display: flex; gap: 4px; }
  .status-label { color: var(--text3); }
  .status-val { color: var(--text2); }

  /* TREE VIEW (left panel) */
  .tree-item {
    padding: 2px 4px 2px 12px;
    cursor: pointer;
    border-radius: 1px;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size);
    color: var(--text);
  }
  .tree-item:hover { background: var(--hover); }
  .tree-item.selected { background: var(--select); color: var(--accent); }
  .tree-icon { color: var(--text3); width: 12px; text-align: center; font-size: 10px; }

  /* PROPERTIES (right panel) */
  .prop-group { margin-bottom: 6px; }
  .prop-label { font-size: 9px; color: var(--text3); text-transform: uppercase; letter-spacing: 0.05em; padding: 3px 4px 1px; }
  .prop-row { display: flex; align-items: center; padding: 2px 4px; gap: 4px; }
  .prop-name { flex: 1; color: var(--text2); font-size: var(--font-size); }
  .prop-val {
    flex: 1.5;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font);
    font-size: var(--font-size);
    padding: 1px 4px;
    border-radius: 1px;
    width: 0;
  }
  .prop-val:focus { outline: none; border-color: var(--accent); }

  /* CONTEXT MENU */
  #ctxMenu {
    position: fixed;
    background: var(--bg2);
    border: 1px solid var(--border);
    min-width: 160px;
    z-index: 9999;
    display: none;
    box-shadow: 4px 4px 12px rgba(0,0,0,0.5);
  }
  #ctxMenu.visible { display: block; }
  .ctx-item {
    padding: 4px 16px 4px 10px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    color: var(--text);
    font-size: var(--font-size);
    font-family: var(--font);
  }
  .ctx-item:hover { background: var(--hover); color: var(--accent); }
  .ctx-sep { height: 1px; background: var(--border); margin: 2px 0; }
  .ctx-disabled { opacity: 0.4; pointer-events: none; }

  /* MODAL / SETTINGS */
  #modalOverlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: 5000;
    display: none;
    align-items: center;
    justify-content: center;
  }
  #modalOverlay.visible { display: flex; }
  .modal {
    background: var(--bg2);
    border: 1px solid var(--border);
    width: 420px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 8px 8px 24px rgba(0,0,0,0.6);
  }
  .modal-header {
    height: 28px;
    background: var(--bg3);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 8px;
    gap: 4px;
    font-size: 11px;
    letter-spacing: 0.05em;
  }
  .modal-title { flex: 1; }
  .modal-close {
    background: transparent; border: 1px solid var(--border);
    color: var(--text2); cursor: pointer;
    width: 16px; height: 16px; font-size: 10px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 1px; font-family: var(--font);
  }
  .modal-close:hover { background: var(--hover); border-color: var(--accent); color: var(--text); }
  .modal-body { flex: 1; overflow-y: auto; padding: 10px; }
  .modal-footer {
    height: 34px; border-top: 1px solid var(--border);
    display: flex; align-items: center; justify-content: flex-end;
    padding: 0 8px; gap: 4px;
  }
  .btn {
    padding: 3px 12px;
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font);
    font-size: var(--font-size);
    cursor: pointer;
    border-radius: 1px;
    transition: background 0.1s;
  }
  .btn:hover { background: var(--hover); border-color: var(--accent); }
  .btn.primary { background: var(--accent2); border-color: var(--accent); color: #fff; }
  .btn.primary:hover { background: var(--accent); }

  /* Settings form */
  .settings-group { margin-bottom: 12px; }
  .settings-group-title { font-size: 10px; color: var(--text3); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px; padding-bottom: 3px; border-bottom: 1px solid var(--border); }
  .settings-row { display: flex; align-items: center; margin-bottom: 5px; gap: 8px; }
  .settings-label { flex: 1; font-size: var(--font-size); color: var(--text2); }
  .settings-input {
    background: var(--bg); border: 1px solid var(--border);
    color: var(--text); font-family: var(--font); font-size: var(--font-size);
    padding: 2px 6px; border-radius: 1px; width: 120px;
  }
  .settings-input:focus { outline: none; border-color: var(--accent); }
  input[type="color"].settings-input { padding: 0; height: 22px; width: 44px; cursor: pointer; }

  /* LOG (bottom panel) */
  .log-line { padding: 1px 4px; border-bottom: 1px solid var(--border); font-size: var(--font-size); }
  .log-info { color: var(--text2); }
  .log-warn { color: #c8a84a; }
  .log-err  { color: #c84a4a; }

  /* Scrollbar */
  ::-webkit-scrollbar { width: 6px; height: 6px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
  ::-webkit-scrollbar-thumb:hover { background: var(--text3); }

  /* OVERVIEW FLOATING WINDOW */
  #overviewWin {
    position: absolute;
    top: 8px; right: 8px;
    width: 220px; height: 180px;
    min-width: 120px; min-height: 100px;
    background: var(--panel);
    border: 1px solid var(--border);
    box-shadow: 4px 4px 14px rgba(0,0,0,0.5);
    display: flex; flex-direction: column;
    z-index: 100;
    overflow: hidden;
  }
  #overviewWin.ov-hidden { display: none; }
  #overviewHeader {
    height: 20px; min-height: 20px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center;
    padding: 0 4px; gap: 4px;
    cursor: move;
    font-size: 9px; letter-spacing: 0.06em; color: var(--text3);
  }
  #overviewTitle { flex: 1; }
  #overviewCanvas { flex: 1; width: 100%; display: block; }
  #overviewResize {
    position: absolute; bottom: 0; left: 0;
    width: 100%; height: 4px;
    cursor: ns-resize;
    background: transparent;
  }
  #overviewResize::after {
    content: '';
    position: absolute; bottom: 0; right: 0;
    width: 10px; height: 10px;
    cursor: nwse-resize;
    border-right: 2px solid var(--border);
    border-bottom: 2px solid var(--border);
  }

  /* Viewport overlays */
  #viewportLabel {
    position: absolute; top: 4px; left: 6px;
    font-size: 10px; color: var(--text3); pointer-events: none; letter-spacing: 0.05em;
  }
  #camInfo {
    position: absolute; bottom: 4px; right: 6px;
    font-size: 9px; color: var(--text3); pointer-events: none; text-align: right;
  }
  /* HELP WINDOW */
  #helpOverlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 6000;
    display: none;
    align-items: flex-start;
    justify-content: flex-end;
    padding: 40px 24px 24px;
  }
  #helpOverlay.visible { display: flex; }
  #helpWin {
    background: var(--bg2);
    border: 1px solid var(--border);
    width: 520px;
    height: 72vh;
    min-width: 300px;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    box-shadow: 8px 8px 28px rgba(0,0,0,0.7);
    position: relative;
  }
  #helpHeader {
    height: 28px;
    background: var(--bg3);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 8px;
    gap: 6px;
    cursor: move;
    font-size: 10px;
    letter-spacing: 0.06em;
    color: var(--text2);
  }
  #helpTitle { flex: 1; }
  #helpFrame {
    flex: 1;
    width: 100%;
    border: none;
    background: var(--bg);
  }
  /* resize handles */
  #helpResizeH {
    position: absolute; bottom: 0; left: 0; right: 10px;
    height: 5px; cursor: s-resize; background: transparent;
  }
  #helpResizeV {
    position: absolute; top: 0; right: 0; bottom: 10px;
    width: 5px; cursor: e-resize; background: transparent;
  }
  #helpResizeC {
    position: absolute; bottom: 0; right: 0;
    width: 12px; height: 12px; cursor: se-resize;
    border-right: 2px solid var(--border);
    border-bottom: 2px solid var(--border);
  }
  /* CONSOLE SPLIT */
  #bottomPanel { display: flex; flex-direction: column; }
  #consoleHeader {
    height: 22px; min-height: 22px;
    background: var(--bg2); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; padding: 0 4px; gap: 3px;
    font-size: 10px; color: var(--text2); letter-spacing: 0.04em; flex-shrink: 0;
  }
  #consoleHeader .panel-title { flex: 1; text-transform: uppercase; font-size: 10px; }
  .con-btn {
    height: 16px; padding: 0 6px; background: var(--bg3);
    border: 1px solid var(--border); color: var(--text2);
    font-family: var(--font); font-size: 9px; cursor: pointer;
    border-radius: 1px; letter-spacing: 0.03em;
  }
  .con-btn:hover { background: var(--hover); color: var(--text); border-color: var(--accent); }
  .con-btn.active { border-color: var(--accent); color: var(--accent); }
  .con-sep { width:1px;height:14px;background:var(--border);margin:0 4px;flex-shrink:0;align-self:center; }
  #consoleOutput {
    flex: 1; overflow-y: auto; overflow-x: hidden; min-height: 30px;
  }
  #consoleResizeInner {
    height: 4px; background: var(--border); cursor: ns-resize; flex-shrink: 0;
  }
  #consoleResizeInner:hover { background: var(--accent); }
  #consoleInputArea {
    display: flex; flex-direction: column; flex-shrink: 0;
    border-top: 1px solid var(--border); min-height: 52px;
  }
  #consoleInputHeader {
    height: 18px; background: var(--bg3); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; padding: 0 6px; gap: 4px;
    font-size: 9px; color: var(--text3); letter-spacing: 0.04em; flex-shrink: 0;
  }
  #consoleInputHeader span { flex:1; }
  #consoleInput {
    flex: 1; background: var(--bg); color: var(--text);
    font-family: var(--font); font-size: 11px;
    border: none; outline: none; padding: 4px 6px;
    resize: none; min-height: 34px;
  }
  #consoleInput::placeholder { color: var(--text3); }
  /* SECTION GIZMO tooltip */
  #gizmoTooltip {
    position: absolute; background: var(--bg2); border: 1px solid var(--accent);
    color: var(--accent); font-family: var(--font); font-size: 10px;
    padding: 2px 6px; pointer-events: none; z-index: 50; display: none;
    white-space: nowrap; border-radius: 1px;
  }
  /* PYTHON OUTPUT CLASSES (used inside bottom panel py tab) */
  .py-out    { color: var(--text2); padding: 1px 0; white-space: pre-wrap; }
  .py-err    { color: #c84a4a; white-space: pre-wrap; }
  .py-cmd    { color: #f0c060; padding: 2px 0; white-space: pre-wrap; border-top: 1px solid var(--border); margin-top:2px; }
  .py-result { color: #7ac87a; white-space: pre-wrap; }


/* Menu container */
.menu-container {
    display: flex;
    justify-content: center;
    gap: 10px;       /* spacing between buttons */
    margin-top: 20px;
}

/* Menu buttons same size as login buttons */
.menu-button {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #555555; /* dark grey default */
    color: #ffffff;
    border: none;
    border-radius: 2px;
    text-decoration: none;
    cursor: pointer;
}
.menu-button:hover {
    background-color: #444444;
}



/* LIGHT MODE (default) */
body {
    background-color: #ffffff;
    color: #000000;
}

/* DARK MODE */
.dark-mode body {
    background-color: #1e1e2e;
    color: #ffffff;
}

/* buttons light mode */
.menu-button {
    background-color: #555555;
    color: white;
}

/* buttons dark mode */
.dark-mode .menu-button {
    background-color: #33334d;
}
.toggle-switch {
    width: 50px;
    height: 25px;
    background: #ccc;
    border-radius: 20px;
    position: relative;
    cursor: pointer;
}

.toggle-knob {
    width: 23px;
    height: 23px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 1px;
    left: 1px;
    transition: left 0.25s;
}

.toggle-switch.on .toggle-knob {
    left: 26px;
}
/* LIGHT (default) */
body, #viewer-container {
    background-color: #ffffff;
    color: #000000;
}

/* DARK */
.dark-mode body, .dark-mode #viewer-container {
    background-color: #1e1e2e;
    color: #ffffff;
}

/* Restore light text in dark mode for panels and main areas */
.dark-mode #viewport,
.dark-mode #bottomPanel,
.dark-mode #consoleOutput,
.dark-mode .panel-content,
.dark-mode .prop-val,
.dark-mode #helpFrame {
    color: #ffffff; /* white text */
}

.dark-mode .dd-item,
.dark-mode .ctx-item,
.dark-mode .tree-item,
.dark-mode #statusbar,
.dark-mode #overviewWin,
.dark-mode #modalOverlay,
.dark-mode #projectModal,
.dark-mode #helpOverlay {
    color: #ffffff;
}

/* Optional: keep secondary text slightly lighter for contrast */
.dark-mode .text2, 
.dark-mode .status-val, 
.dark-mode .prop-name, 
.dark-mode .prop-label {
    color: #c8d4e8; /* same as var(--text) */
}



/* IFC loader / log text bright in dark mode */
.dark-mode #consoleOutput,
.dark-mode #bottomPanel,
.dark-mode #viewport,
.dark-mode #statusbar,
.dark-mode #viewportLabel,
.dark-mode #camInfo {
    color: #ffffff !important; /* white-on-dark backgrounds */
}

.dark-mode .log-line,
.dark-mode .py-out,
.dark-mode .py-err,
.dark-mode .py-cmd,
.dark-mode .py-result {
    color: #ffffff !important; 
}

/* Keep secondary/muted text slightly gray */
.dark-mode .log-info,
.dark-mode .status-val,
.dark-mode .prop-name,
.dark-mode .prop-label {
    color: #c8d4e8 !important; 
}

/* ── text1 fix: match --text per theme class, not media query ───────── */
:root        { --text1: #c8d4e8; }  /* dark (default) */
.light       { --text1: #1a1e28; }  /* light theme */