/* ============================================================
   Ronin Calibrator — Precision Engineering Workstation Theme
   Machined Slate & Obsidian Palette | Zero Bloat | High Density
   ============================================================ */

:root {
    --bg-root: #08090d;
    --bg-header: #0e1118;
    --bg-surface: #121622;
    --bg-card: #161b2a;
    --bg-input: #1a2032;
    --bg-hover: #212940;
    --bg-active: #2a3452;
    --border: #232b3e;
    --border-light: #323e59;
    --border-subtle: #1c2333;

    --text-primary: #e8ecf4;
    --text-secondary: #94a3b8;
    --text-muted: #5e6f88;
    
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-dim: rgba(59, 130, 246, 0.12);
    --accent-border: rgba(59, 130, 246, 0.35);

    --success: #10b981;
    --success-dim: rgba(16, 185, 129, 0.12);
    --warning: #f59e0b;
    --warning-dim: rgba(245, 158, 11, 0.12);
    --danger: #ef4444;
    --danger-dim: rgba(239, 68, 68, 0.12);

    --diff-pos: #10b981;
    --diff-neg: #f43f5e;
    --diff-zero: #475569;

    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --header-h: 44px;
    --tab-strip-h: 34px;
    --toolbar-h: 36px;
    --statusbar-h: 24px;
    --sidebar-w: 270px;
    --inspector-w: 260px;
}

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

body {
    font-family: var(--font-ui);
    background: var(--bg-root);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    font-size: 12px;
    -webkit-font-smoothing: antialiased;
}

/* ===== APP SHELL ===== */
.app-shell {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* ===== TOP ENGINEERING HEADER ===== */
.header-bar {
    height: var(--header-h);
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px;
    flex-shrink: 0;
    z-index: 50;
    user-select: none;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-brand .brand-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.brand-badge svg {
    color: var(--accent);
}

.brand-ver {
    font-size: 9px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: var(--bg-input);
    padding: 1px 5px;
    border-radius: 3px;
    border: 1px solid var(--border);
}

/* Header Middle Metadata Strip */
.header-meta-strip {
    display: flex;
    align-items: center;
    gap: 8px;
}

.meta-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 8px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-secondary);
}

.meta-pill .pill-label {
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 9px;
    font-family: var(--font-ui);
    font-weight: 600;
}

.meta-pill.match-ok {
    border-color: rgba(16, 185, 129, 0.35);
    background: var(--success-dim);
    color: var(--success);
}

.meta-pill.match-warn {
    border-color: rgba(239, 68, 68, 0.35);
    background: var(--danger-dim);
    color: var(--danger);
}

.meta-pill.crc-ok {
    border-color: rgba(16, 185, 129, 0.35);
    color: var(--success);
}

.meta-pill.pill-warning {
    border-color: rgba(245, 158, 11, 0.45);
    background: rgba(245, 158, 11, 0.12);
    color: #f59e0b;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    font-family: var(--font-ui);
    font-size: 11px;
    font-weight: 500;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.12s ease;
    user-select: none;
    white-space: nowrap;
}

.btn:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.btn:active:not(:disabled) {
    background: var(--bg-active);
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-sm {
    padding: 2px 7px;
    font-size: 10px;
}

/* ===== 3-PANE WORKSPACE LAYOUT ===== */
.workstation-container {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: var(--bg-root);
}

/* Left Pane: Map Explorer Tree */
.explorer-pane {
    width: var(--sidebar-w);
    min-width: 220px;
    max-width: 380px;
    background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

.explorer-header {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--bg-header);
}

.explorer-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.explorer-search-input {
    width: 100%;
    padding: 5px 8px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 11px;
    outline: none;
    transition: border-color 0.15s;
}

.explorer-search-input:focus {
    border-color: var(--accent);
}

.explorer-search-input::placeholder {
    color: var(--text-muted);
}

.explorer-tree-wrap {
    flex: 1;
    overflow-y: auto;
    padding: 6px 0;
}

/* Tree Structure */
.tree-folder {
    margin-bottom: 2px;
}

.tree-folder-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 11px;
    color: var(--text-secondary);
    user-select: none;
    transition: background 0.1s;
}

.tree-folder-header:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tree-folder-icon {
    width: 12px;
    height: 12px;
    color: var(--text-muted);
    transition: transform 0.15s;
}

.tree-folder.open .tree-folder-icon {
    transform: rotate(90deg);
}

.tree-folder-count {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--text-muted);
    background: var(--bg-input);
    padding: 0 4px;
    border-radius: 3px;
}

.tree-folder-children {
    display: none;
    padding-left: 8px;
}

.tree-folder.open .tree-folder-children {
    display: block;
}

.tree-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px 4px 16px;
    cursor: pointer;
    font-size: 11px;
    color: var(--text-secondary);
    border-left: 2px solid transparent;
    user-select: none;
    transition: all 0.1s;
}

.tree-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tree-item.active {
    background: var(--bg-active);
    color: var(--text-primary);
    border-left-color: var(--accent);
    font-weight: 500;
}

.tree-item-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-item-badge {
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--text-muted);
}

.tree-item-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    display: none;
}

.tree-item.changed .tree-item-dot {
    display: block;
}

/* Center Pane: Multi-Tab Table Workspace */
.center-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-root);
}

/* Multi-Tab Strip */
.tab-strip {
    height: var(--tab-strip-h);
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: flex-end;
    padding: 0 6px;
    overflow-x: auto;
    flex-shrink: 0;
    gap: 2px;
}

.tab-chip {
    height: 28px;
    padding: 0 10px;
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    transition: all 0.1s;
    max-width: 180px;
}

.tab-chip:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tab-chip.active {
    background: var(--bg-card);
    border-color: var(--border-light);
    color: var(--text-primary);
    font-weight: 600;
}

.tab-chip-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tab-chip-close {
    width: 14px;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
    color: var(--text-muted);
    font-size: 11px;
}

.tab-chip-close:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-primary);
}

/* Active Workspace Body */
.workspace-active-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Workstation Toolbar */
.workstation-toolbar {
    height: var(--toolbar-h);
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    flex-shrink: 0;
    gap: 8px;
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.view-mode-toggle {
    display: flex;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px;
}

.view-mode-btn {
    padding: 2px 8px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.1s;
}

.view-mode-btn.active {
    background: var(--accent);
    color: #fff;
    font-weight: 600;
}

.math-tool-group {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0 6px;
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.math-input {
    width: 50px;
    padding: 2px 4px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 11px;
    text-align: right;
    outline: none;
}

.math-input:focus {
    border-color: var(--accent);
}

/* Table Area */
.table-scroll-area {
    flex: 1;
    overflow: auto;
    padding: 12px;
    background: var(--bg-root);
}

.pro-table {
    border-collapse: collapse;
    font-family: var(--font-mono);
    font-size: 11px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.pro-table th, .pro-table td {
    padding: 4px 7px;
    text-align: right;
    border: 1px solid var(--border);
    min-width: 46px;
    white-space: nowrap;
}

.pro-table th {
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 10px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.pro-table th:first-child {
    left: 0;
    z-index: 20;
}

.pro-table .row-header {
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 10px;
    position: sticky;
    left: 0;
    z-index: 5;
    text-align: left;
}

.pro-table td.cell-data {
    cursor: pointer;
    user-select: none;
    transition: background 0.08s;
}

.pro-table td.cell-data:hover {
    outline: 1px solid var(--accent);
    outline-offset: -1px;
}

.pro-table td.cell-data.selected {
    outline: 2px solid var(--accent) !important;
    outline-offset: -2px;
    background: rgba(59, 130, 246, 0.28) !important;
    color: #ffffff !important;
    font-weight: 700;
}

.pro-table td.cell-data.changed {
    position: relative;
}

.pro-table td.cell-data.changed::after {
    content: '';
    position: absolute;
    top: 1px;
    right: 1px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
}

/* Delta Diff Mode Colors */
.pro-table td.diff-pos {
    background: rgba(16, 185, 129, 0.15) !important;
    color: var(--diff-pos) !important;
    font-weight: 600;
}

.pro-table td.diff-neg {
    background: rgba(244, 63, 94, 0.15) !important;
    color: var(--diff-neg) !important;
    font-weight: 600;
}

.pro-table td.diff-zero {
    color: var(--text-muted) !important;
}

/* Table Heatmap Gradient */
.pro-table td.cell-cold {
    background: rgba(30, 58, 138, 0.35);
    color: #93c5fd;
}

.pro-table td.cell-cool {
    background: rgba(14, 116, 144, 0.30);
    color: #67e8f9;
}

.pro-table td.cell-neutral {
    background: rgba(5, 150, 105, 0.25);
    color: #a7f3d0;
}

.pro-table td.cell-warm {
    background: rgba(217, 119, 6, 0.32);
    color: #fde68a;
}

.pro-table td.cell-hot {
    background: rgba(220, 38, 38, 0.40);
    color: #fecaca;
    font-weight: 600;
}

/* 3D Wireframe Canvas Container */
.surface-view-container {
    flex: 1;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: var(--bg-root);
}

.surface-canvas {
    flex: 1;
    width: 100%;
    min-height: 0;
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

/* Right Pane: Map Inspector & Stats Drawer */
.inspector-pane {
    width: var(--inspector-w);
    min-width: 220px;
    background: var(--bg-surface);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
    padding: 10px;
    gap: 12px;
}

.inspector-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 10px;
}

.inspector-card-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.inspector-field {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    font-size: 11px;
}

.inspector-field .field-lbl {
    color: var(--text-muted);
}

.inspector-field .field-val {
    font-family: var(--font-mono);
    color: var(--text-primary);
}

/* Empty State / Welcome Screen */
.empty-workspace-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    text-align: center;
    padding: 30px;
}

.empty-workspace-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    opacity: 0.3;
}

/* Persistent Statusbar */
.workstation-statusbar {
    height: var(--statusbar-h);
    background: var(--bg-header);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    flex-shrink: 0;
    user-select: none;
}

/* Cell edit input */
.cell-edit-input {
    width: 100%;
    border: none;
    background: var(--bg-input);
    color: #ffffff;
    font-family: var(--font-mono);
    font-size: 11px;
    text-align: right;
    outline: none;
    padding: 1px 2px;
}

/* Toast notifications */
#toast {
    position: fixed;
    bottom: 30px;
    right: 20px;
    padding: 8px 14px;
    border-radius: 4px;
    font-size: 11px;
    font-family: var(--font-ui);
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.5);
    z-index: 9999;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.2s ease;
    pointer-events: none;
}

#toast.show {
    opacity: 1;
    transform: translateY(0);
}

#toast.info    { background: var(--bg-surface); border: 1px solid var(--border); color: var(--text-primary); }
#toast.success { background: #064e3b; border: 1px solid #059669; color: #a7f3d0; }
#toast.warning { background: #78350f; border: 1px solid #d97706; color: #fde68a; }
#toast.error   { background: #7f1d1d; border: 1px solid #dc2626; color: #fecaca; }

/* Modal Backdrop */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-dialog {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.6);
    overflow: hidden;
}

.modal-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    font-size: 13px;
}

.modal-body {
    padding: 16px;
    max-height: 70vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    background: var(--bg-header);
}


/* ===== Map description card (inspector pane) ===== */
.map-desc-card .inspector-card-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}
.map-desc-badge {
    font-size: 9px;
    letter-spacing: 0.06em;
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    cursor: help;
}
.map-desc-badge.conf-v { color: #4cd964; border-color: #4cd964; }
.map-desc-badge.conf-i { color: #ffb84d; border-color: #ffb84d; }
.map-desc-badge.conf-u { color: #ff6b6b; border-color: #ff6b6b; }
.map-desc-name {
    font-weight: 600;
    font-size: 12px;
    margin: 6px 0 4px;
    color: var(--text-primary);
    word-break: break-word;
}
.map-desc-text {
    margin: 0;
    font-size: 12px;
    line-height: 1.45;
    color: var(--text-secondary);
}
.map-desc-tip {
    margin-top: 8px;
    padding: 6px 8px;
    font-size: 11px;
    line-height: 1.4;
    border-left: 2px solid #ffb84d;
    background: rgba(255, 184, 77, 0.08);
    color: var(--text-secondary);
}
.map-desc-tip[hidden] { display: none; }


/* ===== Pinned / favourite maps ===== */
.tree-item-star {
    font-size: 13px;
    line-height: 1;
    color: var(--text-muted);
    opacity: 0;
    padding: 0 2px;
    cursor: pointer;
    transition: opacity 0.1s, color 0.1s;
}
.tree-item:hover .tree-item-star,
.tree-item-star:focus,
.tree-item-star.pinned { opacity: 1; }
.tree-item-star:hover { color: #ffb84d; }
.tree-item-star.pinned { color: #ffb84d; }
.pinned-folder > .tree-folder-header { color: #ffb84d; }
@media (hover: none) { .tree-item-star { opacity: 0.6; } .tree-item-star.pinned { opacity: 1; } }


/* ===== Editable axis headers ===== */
.pro-table th.axis-editable,
.pro-table td.row-header.axis-editable { cursor: cell; }
.pro-table th.axis-editable:hover,
.pro-table td.row-header.axis-editable:hover { background: var(--bg-hover); color: var(--text-primary); }
.pro-table th.axis-changed,
.pro-table td.row-header.axis-changed { color: var(--accent); box-shadow: inset 0 -2px 0 var(--accent); }
.pro-table th.editing, .pro-table td.row-header.editing { padding: 0; }
.pro-table th .cell-edit-input, .pro-table td.row-header .cell-edit-input { min-width: 56px; text-align: center; }


/* ===== 3D surface toolbar ===== */
.surface-toolbar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 8px;
    font-size: 10px;
    font-family: var(--font-mono);
    color: var(--text-muted);
}
.surface-presets { display: flex; gap: 4px; }
.surface-preset-btn {
    font: inherit;
    padding: 3px 9px;
    border: 1px solid var(--border-light);
    border-radius: 3px;
    background: var(--bg-surface);
    color: var(--text-secondary);
    cursor: pointer;
}
.surface-preset-btn:hover { background: var(--bg-hover); color: var(--text-primary); }