:root {
    --bg: #141516;
    --panel: #1d1f21;
    --panel-2: #272a2d;
    --panel-3: #31353a;
    --line: #3c4147;
    --line-strong: #565d65;
    --text: #f2f1ee;
    --muted: #c2c0bb;
    --dim: #898781;
    --red: #ef6673;
    --orange: #e99a55;
    --yellow: #e8c56a;
    --green: #5dcc8f;
    --cyan: #58bfc3;
    --blue: #709de6;
    --violet: #b18be8;
    --canvas: #1a1b1d;
    --surface-hover: #34383c;
}

button,
input,
select,
details,
.modal-card,
.modal-choice,
.upload-zone,
.object-row,
.stat-box,
.source-import,
.primary-mode,
.advanced-tools,
.context-toolbar,
.transform-gizmo,
.inspector-details { border-radius: 0 !important; }

.app {
    grid-template-columns: 238px minmax(420px, 1fr) 270px;
    grid-template-rows: 58px minmax(0, 1fr) 34px;
}

.header h1 { font-size: 17px; }
.header .subtitle { font-size: 11px; }
.header-action,
.info-toggle { font-size: 10px; border-color: var(--line); }

.left-panel,
.right-panel { padding: 0 0 12px; }

.rail-group {
    --group-accent: var(--muted);
    margin: 12px 10px 0;
    min-width: 0;
    overflow: hidden;
    background: #222426;
    border: 1px solid var(--line);
    box-shadow: inset 3px 0 0 var(--group-accent);
}

.rail-heading {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 35px;
    padding: 8px 10px 8px 13px;
    color: var(--text);
    background: #191b1d;
    border-bottom: 1px solid var(--line);
    font-size: 12px;
    font-weight: 850;
    letter-spacing: .8px;
    text-transform: uppercase;
}

.rail-heading span,
.panel-section,
.panel-label,
.grid-size-row { min-width: 0; }

.rail-heading i { color: var(--group-accent); font-size: 17px; }
.project-group { --group-accent: var(--blue); }
.canvas-group { --group-accent: var(--orange); }
.edit-group { --group-accent: var(--green); }
.scene-group { --group-accent: var(--red); }
.objects-group { --group-accent: var(--violet); }
.camera-group { --group-accent: var(--cyan); }
.display-group { --group-accent: var(--yellow); }

.panel-section {
    margin: 0;
    padding: 11px;
    border-bottom: 1px solid #34383d;
}

.rail-group > .panel-section:last-child { border-bottom: 0; }

.panel-label {
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .7px;
}

.panel-label i { color: var(--group-accent); font-size: 15px; }

.source-import {
    min-height: 60px;
    border: 1px solid var(--line);
}
.project-group .source-import:hover { border-color: var(--blue); }
.project-group .source-import > i { color: #101923; background: var(--blue); }
.source-import strong { font-size: 12px; font-weight: 850; }
.source-import small { font-size: 10px; line-height: 1.3; }

.grid-size-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
}
.grid-size-btn,
.pixel-size-btn,
.view-btn,
.toggle-btn,
.tool-action,
.context-btn,
.gizmo-mode,
.tool-jump {
    min-height: 34px;
    gap: 5px;
    border: 1px solid var(--line);
    font-size: 11px;
    font-weight: 750;
}

.grid-size-btn,
.pixel-size-btn,
.view-btn,
.toggle-btn {
    min-width: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.grid-size-btn i,
.pixel-size-btn i,
.view-btn i,
.toggle-btn i { font-size: 15px; }

.canvas-group .grid-size-btn.active { color: #2c1a09; background: var(--orange); border-color: var(--orange); }
.display-group .toggle-btn.active,
.display-group .pixel-size-btn.active { color: #2d260c; background: var(--yellow); border-color: var(--yellow); }
.camera-group .view-btn.active { color: #08282a; background: var(--cyan); border-color: var(--cyan); }

.control-caption { color: var(--muted); font-size: 11px; }
.color-input { width: 40px; height: 40px; border-color: var(--line-strong); }

.primary-mode {
    min-height: 74px;
    padding: 10px;
    background: #263331;
    border: 1px solid #46625f;
}
.primary-mode strong { color: var(--green); font-size: 12px; font-weight: 850; }
.primary-mode span { margin-top: 5px; color: var(--muted); font-size: 9px; line-height: 1.4; }

.advanced-tools { border-color: var(--line); }
.advanced-tools summary { min-height: 40px; color: var(--green); font-size: 10px; }
.edit-help { color: var(--dim); font-size: 9px; line-height: 1.5; }

#clear-btn { min-height: 38px; font-size: 11px; }

.context-toolbar { border-color: var(--line-strong); }
.context-toolbar { background: #242629; }
.transform-gizmo { background: #1c1e20; }
.gizmo-mode.active { color: #14241b; background: var(--green); border-color: var(--green); }
.context-btn.copy { color: var(--cyan); }
.context-btn.cut { color: var(--red); }
.context-btn.fill { color: var(--yellow); }

.object-header { margin-bottom: 9px; }
.objects-group .object-count { color: #20152e; background: var(--violet); }
.objects-group .object-toolbar .tool-action { color: var(--violet); }
.objects-group .object-row.active { background: #342947; border-color: var(--violet); }
.object-row { min-height: 50px; border-color: var(--line); }
.object-empty {
    padding: 11px;
    color: var(--muted);
    background: #25282b;
    border-color: var(--line-strong);
    font-size: 10px;
    line-height: 1.45;
}

.view-grid { gap: 5px; }
.view-btn { min-height: 36px; font-size: 10px; }
.toggle-row { gap: 5px; }
.toggle-btn { flex: 1; }

.slider-row label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--muted);
    font-size: 10px;
}
.slider-row label i { color: var(--yellow); font-size: 15px; }

.inspector-details { margin: 0; border-color: var(--line); }
.inspector-details summary { min-height: 38px; font-size: 10px; }
.stat-box { border-color: var(--line); }

.modal-choice,
.import-kind-btn,
.icon-btn { border-color: var(--line); }

.import-card { width: min(680px, calc(100vw - 28px)); }
.import-card .modal-body { max-height: min(76vh, 720px); overflow-y: auto; }
.texture-mode-tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}
.texture-mode {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 42px;
    padding: 7px;
    color: var(--muted);
    background: var(--panel-2);
    border: 1px solid var(--line);
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
    cursor: pointer;
}
.texture-mode i { color: var(--dim); font-size: 18px; }
.texture-mode:hover { color: var(--text); background: var(--surface-hover); border-color: var(--line-strong); }
.texture-mode.active { color: #121c17; background: var(--green); border-color: var(--green); }
.texture-mode.active i { color: #121c17; }
.texture-mode-panel {
    display: grid;
    gap: 8px;
    padding: 10px;
    background: #202224;
    border: 1px solid var(--line);
}
.texture-mode-panel[hidden] { display: none; }
.source-mode-head {
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 9px;
    align-items: center;
}
.source-mode-head > i { color: var(--orange); font-size: 23px; }
.source-mode-head strong,
.source-mode-head small { display: block; }
.source-mode-head strong { color: var(--text); font-size: 11px; text-transform: uppercase; }
.source-mode-head small { margin-top: 3px; color: var(--muted); font-size: 9px; line-height: 1.35; }
.face-upload-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.face-upload-grid .upload-zone { min-height: 76px; }
.single-face-row {
    display: grid;
    grid-template-columns: 1fr 180px;
    gap: 8px;
    align-items: center;
}
.single-face-row label { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 10px; font-weight: 750; }
.single-face-row label i { color: var(--blue); font-size: 17px; }
.single-face-row select { min-height: 36px; padding: 5px 8px; color: var(--text); background: var(--panel-2); border: 1px solid var(--line); }
.texture-import .upload-zone.dragging { background: #2e3832; border-color: var(--green); }
.texture-import .upload-zone.has-error { background: #382528; border-color: var(--red); }
.texture-import .upload-zone img { width: 48px; height: 48px; object-fit: contain; image-rendering: pixelated; }
.import-submit-row { margin-top: 2px; }
.overlay-action { color: var(--blue); }
.modal-status { min-height: 18px; padding: 2px 1px; font-size: 10px; }

@media (max-width: 900px) {
    .app {
        grid-template-columns: 190px minmax(260px, 1fr);
        grid-template-rows: 50px minmax(250px, 1fr) 194px 32px;
    }
    .left-panel { padding: 0 0 8px; }
    .right-panel {
        display: grid;
        grid-template-columns: minmax(220px, 1fr) minmax(220px, 1fr);
        gap: 8px;
        padding: 8px;
    }
    .right-panel > .rail-group { margin: 0; }
    .right-panel > .display-group { grid-column: 1 / -1; }
    .context-toolbar { max-width: calc(100vw - 275px); }
}

@media (max-width: 560px) {
    .app { grid-template-columns: 190px minmax(220px, 1fr); }
    .rail-group { margin: 8px 7px 0; }
    .rail-heading { min-height: 30px; padding: 6px 8px 6px 10px; font-size: 9px; }
    .rail-heading i { font-size: 15px; }
    .left-panel .panel-section { padding: 9px; }
    .left-panel .panel-label { font-size: 9px; }
    .source-import { grid-template-columns: 29px 1fr; padding: 7px; }
    .source-import > i { width: 29px; height: 29px; font-size: 17px; }
    .source-import strong { font-size: 10px; }
    .source-import small { font-size: 8px; }
    .grid-size-btn { min-width: 0; padding: 3px; }
    .primary-mode { min-height: 64px; padding: 8px; }
    .primary-mode strong { font-size: 10px; }
    .right-panel { grid-template-columns: 1fr 1fr; }
    .right-panel .rail-heading { font-size: 8px; }
    .right-panel .panel-section { padding: 7px; }
    .right-panel .view-grid { grid-template-columns: repeat(4, 1fr) !important; gap: 3px; }
    .view-btn { min-height: 27px; padding: 2px; font-size: 7px; }
    .view-btn i { font-size: 11px; }
    .object-row { min-height: 38px; }
    .texture-mode-tabs { grid-template-columns: repeat(2, 1fr); }
    .face-upload-grid { grid-template-columns: repeat(2, 1fr); }
    .single-face-row { grid-template-columns: 1fr; }
}