/* ═══════════════════════════════════════════════════════════════════════════════
   ProImage Render Tab — Photorealistic 3D Rendering
   ═══════════════════════════════════════════════════════════════════════════════ */

.render-container {
    display: grid;
    grid-template-columns: 300px 1fr 280px;
    grid-template-rows: auto 1fr auto;
    gap: 0;
    height: calc(100vh - 100px);
    background: var(--bg-primary);
}

/* ── Upload / Scene Panel (Left) ── */
.render-left {
    grid-row: 1 / 4;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 0;
}

.render-left .panel-section {
    border-bottom: 1px solid var(--border);
}

.render-left .panel-header {
    padding: 10px 14px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.render-left .panel-body {
    padding: 10px 14px;
}

/* ── Upload Zone ── */
.render-upload-zone {
    border: 2px dashed var(--border);
    border-radius: 10px;
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--bg-tertiary);
}

.render-upload-zone:hover,
.render-upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-subtle);
}

.render-upload-zone .upload-icon {
    font-size: 32px;
    opacity: 0.4;
    margin-bottom: 8px;
}

.render-upload-zone .upload-text {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.render-upload-zone .upload-text strong {
    color: var(--accent);
    display: block;
    font-size: 13px;
    margin-bottom: 4px;
}

.render-upload-zone .format-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
    margin-top: 8px;
}

.render-upload-zone .format-tag {
    font-size: 9px;
    padding: 2px 6px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ── File Info Card ── */
.render-file-info {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    display: none;
}

.render-file-info.visible {
    display: block;
}

.render-file-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    word-break: break-all;
}

.render-file-meta {
    font-size: 10px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.render-model-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin-top: 8px;
}

.render-stat {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 8px;
    text-align: center;
}

.render-stat-value {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    font-family: var(--font-mono);
}

.render-stat-label {
    font-size: 9px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 2px;
}

/* ── Setting Controls ── */
.render-setting {
    margin-bottom: 10px;
}

.render-setting label {
    display: block;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-bottom: 4px;
}

.render-setting select,
.render-setting input[type="number"],
.render-setting input[type="range"] {
    width: 100%;
    padding: 5px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 12px;
    font-family: var(--font);
}

.render-setting input[type="range"] {
    padding: 0;
    height: 6px;
    -webkit-appearance: none;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 3px;
    cursor: pointer;
}

.render-setting input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.render-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.render-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 0;
}

.render-checkbox input {
    accent-color: var(--accent);
}

/* ── HDRI Grid ── */
.hdri-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.hdri-card {
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s;
}

.hdri-card:hover {
    border-color: var(--text-muted);
}

.hdri-card.active {
    border-color: var(--accent);
    background: var(--accent-subtle);
}

.hdri-card .hdri-preview {
    width: 100%;
    height: 40px;
    border-radius: 4px;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.hdri-card .hdri-name {
    font-size: 9px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ── 3D Viewport (Center) ── */
.render-viewport {
    grid-column: 2;
    grid-row: 1 / 3;
    position: relative;
    background: #1a1d27;
    overflow: hidden;
}

.render-viewport canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

.render-viewport-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 5;
}

.render-viewport-overlay.hidden {
    display: none;
}

.viewport-placeholder {
    text-align: center;
    pointer-events: auto;
}

.viewport-placeholder .placeholder-icon {
    font-size: 48px;
    opacity: 0.15;
    margin-bottom: 12px;
}

.viewport-placeholder .placeholder-text {
    font-size: 14px;
    color: var(--text-muted);
    opacity: 0.5;
}

/* Viewport toolbar */
.viewport-toolbar {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    gap: 4px;
    z-index: 10;
}

.viewport-btn {
    padding: 5px 10px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 6px;
    background: rgba(0,0,0,0.6);
    color: #ccc;
    font-size: 10px;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: all 0.15s;
    font-family: var(--font);
}

.viewport-btn:hover {
    background: rgba(0,0,0,0.8);
    color: #fff;
    border-color: rgba(255,255,255,0.3);
}

.viewport-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* Viewport info */
.viewport-info {
    position: absolute;
    bottom: 10px;
    left: 10px;
    font-size: 10px;
    color: rgba(255,255,255,0.4);
    font-family: var(--font-mono);
    z-index: 10;
}

/* Render result overlay */
.render-result-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000;
    z-index: 20;
    display: none;
    align-items: center;
    justify-content: center;
}

.render-result-overlay.visible {
    display: flex;
}

.render-result-overlay img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.render-result-close {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 6px 12px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 6px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    cursor: pointer;
    font-size: 11px;
    z-index: 21;
}

/* ── Render Bar (Bottom) ── */
.render-bar {
    grid-column: 2;
    grid-row: 3;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.render-bar .render-progress {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    display: none;
}

.render-bar .render-progress.visible {
    display: block;
}

.render-bar .render-progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.3s;
    width: 0%;
}

.render-status-text {
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    min-width: 200px;
}

/* ── Settings Panel (Right) ── */
.render-right {
    grid-row: 1 / 4;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    overflow-y: auto;
}

.render-right .panel-section {
    border-bottom: 1px solid var(--border);
}

.render-right .panel-header {
    padding: 10px 14px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    user-select: none;
}

.render-right .panel-body {
    padding: 10px 14px;
}

/* ── Quality Preset Cards ── */
.quality-presets {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.quality-card {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
    background: var(--bg-primary);
}

.quality-card:hover {
    border-color: var(--text-muted);
}

.quality-card.active {
    border-color: var(--accent);
    background: var(--accent-subtle);
}

.quality-card .qc-radio {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--border);
    flex-shrink: 0;
}

.quality-card.active .qc-radio {
    border-color: var(--accent);
    background: var(--accent);
    box-shadow: inset 0 0 0 3px var(--bg-primary);
}

.quality-card .qc-info {
    flex: 1;
    min-width: 0;
}

.quality-card .qc-name {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-primary);
}

.quality-card .qc-desc {
    font-size: 9px;
    color: var(--text-muted);
    margin-top: 1px;
}

/* ── Render Button ── */
.render-btn-primary {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font);
    letter-spacing: 0.3px;
}

.render-btn-primary:hover {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.render-btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.render-btn-secondary {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
}

.render-btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ── Loading Spinner ── */
.render-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: render-spin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
}

@keyframes render-spin {
    to { transform: rotate(360deg); }
}

/* ── Resolution Presets ── */
.resolution-presets {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    margin-top: 6px;
}

.res-btn {
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-muted);
    font-size: 9px;
    font-family: var(--font-mono);
    cursor: pointer;
    text-align: center;
}

.res-btn:hover, .res-btn.active {
    border-color: var(--accent);
    color: var(--accent);
}

/* ── Light Item ── */
.light-item {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 8px;
    margin-bottom: 4px;
    cursor: pointer;
    transition: all 0.15s;
}
.light-item:hover { border-color: var(--text-muted); }
.light-item.selected { border-color: var(--accent); background: var(--accent-subtle); }
.light-item input[type="range"] {
    -webkit-appearance: none; height: 4px; background: var(--bg-tertiary);
    border: none; border-radius: 2px; cursor: pointer; width: 100%;
}
.light-item input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); cursor: pointer;
}

/* ── Material Editor ── */
.mat-edit-row {
    margin-bottom: 6px;
}
.mat-edit-row label {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 10px; font-weight: 600; color: var(--text-secondary);
    text-transform: uppercase; letter-spacing: 0.3px; margin-bottom: 3px;
}
.mat-edit-row label span { color: var(--accent); font-family: var(--font-mono); font-size: 10px; }
.mat-edit-row input[type="color"] {
    width: 100%; height: 24px; border: 1px solid var(--border); border-radius: 4px;
    background: var(--bg-primary); cursor: pointer; padding: 2px;
}
.mat-edit-row input[type="range"] {
    width: 100%; -webkit-appearance: none; height: 5px; background: var(--bg-tertiary);
    border: none; border-radius: 3px; cursor: pointer;
}
.mat-edit-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); cursor: pointer;
}

/* ── Responsive ── */
@media (max-width: 1100px) {
    .render-container {
        grid-template-columns: 260px 1fr 240px;
    }
}

@media (max-width: 900px) {
    .render-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto 400px auto auto auto;
        height: auto;
    }
    .render-left { grid-row: 1; border-right: none; border-bottom: 1px solid var(--border); }
    .render-viewport { grid-column: 1; grid-row: 2; min-height: 400px; }
    .render-bar { grid-column: 1; grid-row: 3; }
    .render-right { grid-row: 4; border-left: none; border-top: 1px solid var(--border); }
}