/* ============================================================
   TAC Viewer — Layout del app shell y viewport grid
   ============================================================ */

/* ── App shell grid ─────────────────────────────────────── */
#appShell {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr var(--meta-width);
    grid-template-rows: var(--toolbar-height) 1fr;
    grid-template-areas:
        "toolbar toolbar toolbar"
        "series  main    meta";
    height: calc(100vh - var(--statusbar-height));
    overflow: hidden;
    background: var(--bg-app);
}

/* Toolbar ocupa todo el ancho */
#toolbar      { grid-area: toolbar; }
#seriesPanel  { grid-area: series; }
#mainArea     { grid-area: main; position: relative; overflow: hidden; }
#metadataPanel { grid-area: meta; }

/* Estado colapsado del panel de metadata */
#metadataPanel.collapsed {
    width: 32px;
    min-width: 32px;
}
#appShell:has(#metadataPanel.collapsed) {
    grid-template-columns: var(--sidebar-width) 1fr 32px;
}

/* ── Viewport grid ──────────────────────────────────────── */
#viewportGrid {
    display: grid;
    width: 100%;
    height: 100%;
    gap: 2px;
    background: #111;
}

#viewportGrid[data-layout="1x1"] {
    grid-template: 1fr / 1fr;
}
#viewportGrid[data-layout="2x1"] {
    grid-template: 1fr / 1fr 1fr;
}
#viewportGrid[data-layout="2x2"] {
    grid-template: 1fr 1fr / 1fr 1fr;
}
#viewportGrid[data-layout="mpr"] {
    grid-template: 1fr 1fr / 3fr 2fr;
}
#viewportGrid[data-layout="mpr"] .viewport-cell:first-child {
    grid-row: 1 / 3;
}

/* ── Viewport cell ──────────────────────────────────────── */
.viewport-cell {
    position: relative;
    background: #000;
    overflow: hidden;
    cursor: crosshair;
    outline: 1.5px solid transparent;
    transition: outline-color var(--fast);
}
.viewport-cell.active {
    outline-color: var(--brand-accent);
}

/* El canvas WebGL llena la celda */
.viewport-cell canvas.gl-canvas {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    display: block;
}

/* Canvas TV (Total Variation) — entre GL y overlay, nunca intercepta eventos */
.viewport-cell canvas.tv-canvas {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    display: block;
    image-rendering: pixelated;
    pointer-events: none;
}

/* Canvas 2D de overlays — encima del WebGL */
.viewport-cell canvas.overlay-canvas {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    display: block;
    pointer-events: none; /* el WebGL canvas maneja eventos */
}

/* Label de viewport (ej. "Axial", "Coronal") */
.viewport-label-row {
    position: absolute; top: 6px; left: 50%;
    transform: translateX(-50%);
    display: flex; align-items: center; gap: 6px;
    pointer-events: none;
    z-index: 5;
}
.viewport-label {
    font-size: 10px; font-weight: 700; letter-spacing: 0.08em;
    color: var(--overlay-text); text-shadow: var(--overlay-shadow);
    opacity: 0.6;
    text-transform: uppercase;
    pointer-events: none;
}
.mpr-cine-btn {
    pointer-events: all;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 3px;
    color: var(--overlay-text);
    font-size: 9px; line-height: 1;
    padding: 2px 5px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.15s, background 0.15s;
}
.mpr-cine-btn:hover { opacity: 1; background: rgba(255,255,255,0.22); }
.mpr-mode-select {
    pointer-events: all;
    background: rgba(0,0,0,0.5);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 3px;
    color: var(--overlay-text);
    font-size: 9px; padding: 1px 2px;
    cursor: pointer; opacity: 0.7;
}
.mpr-mode-select:hover { opacity: 1; }
.mpr-mode-select option { background: #1e293b; color: #fff; }
.mpr-slab-row {
    position: absolute; top: 28px; left: 50%;
    transform: translateX(-50%);
    display: flex; align-items: center; gap: 4px;
    pointer-events: all; z-index: 5;
}
.mpr-slab-label { font-size: 9px; color: rgba(255,255,255,0.6); }
.mpr-slab-slider { width: 60px; height: 2px; cursor: pointer; opacity: 0.8; }
.mpr-slab-val { font-size: 9px; color: rgba(255,255,255,0.8); min-width: 12px; }

/* ── Status bar ──────────────────────────────────────────── */
#statusBar {
    height: var(--statusbar-height);
    background: var(--toolbar-bg);
    border-top: 1px solid var(--border);
    display: flex; align-items: center;
    padding: 0 12px; gap: 4px;
    font-size: 11px; color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    user-select: none;
}
#statusBar span { white-space: nowrap; }
.status-sep { color: var(--border-strong); }
.status-right-sep { margin-left: auto; }
.status-right { color: var(--text-tertiary); flex: 1; text-align: right; overflow: hidden; text-overflow: ellipsis; }

/* Cursores por herramienta activa */
body[data-tool="pan"]          .viewport-cell { cursor: grab; }
body[data-tool="pan"].dragging .viewport-cell { cursor: grabbing; }
body[data-tool="zoom"]         .viewport-cell { cursor: zoom-in; }
body[data-tool="windowing"]    .viewport-cell { cursor: col-resize; }
body[data-tool="distance"]     .viewport-cell { cursor: crosshair; }
body[data-tool="angle"]        .viewport-cell { cursor: crosshair; }
body[data-tool="ellipse"]      .viewport-cell { cursor: crosshair; }
body[data-tool="rectangle"]    .viewport-cell { cursor: crosshair; }
body[data-tool="probe"]        .viewport-cell { cursor: cell; }
body[data-tool="arrow"]        .viewport-cell { cursor: crosshair; }
body[data-tool="text"]         .viewport-cell { cursor: text; }
body[data-tool="pointer"]      .viewport-cell { cursor: default; }

/* ── Status bar cine controls ───────────────────────────── */
.status-cine {
    display: flex; align-items: center; gap: 2px;
    flex-shrink: 0;
}
.status-cine button {
    width: 22px; height: 22px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary); font-size: 10px;
    transition: all var(--fast);
}
.status-cine button:hover { background: var(--bg-secondary); color: var(--text-primary); }
#cinePlay { color: var(--brand-accent); }
#cinePlay:hover { background: rgba(120,218,171,0.15); }
#cinePlay.playing { color: var(--warning); }

#cineFps {
    height: 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 10px; padding: 0 4px;
    cursor: pointer; outline: none;
    appearance: none; -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='4'%3E%3Cpath d='M0 0l4 4 4-4z' fill='%23556677'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 4px center;
    padding-right: 16px;
}
#cineFps option { background: #1a2540; }