/* =========================================================================
 * Material Panel — 材质光色对比
 * Internal component styling only; page geometry belongs to layout-final.css.
 * ========================================================================= */

.material-panel {
    margin: 0;
    padding: 15px;
    box-shadow: none;
    overflow-x: hidden;
    min-width: 0;
}

.material-panel-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 12px;
}

.material-panel-header h2,
.material-detail h3 {
    margin: 0;
    color: var(--text-primary);
}

.material-panel-header h2 { font-size: 16px; }
.material-panel-header p,
.material-detail p,
.material-panel-note {
    margin: 3px 0 0;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.5;
}

.material-reference,
.material-data-badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 5px 8px;
    border-radius: 7px;
    background: var(--surface-secondary);
    color: var(--text-secondary);
    font-size: 10px;
}

/* ---- Category Tabs ---- */

.material-category-tabs {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 10px 0 14px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.material-category-tabs::-webkit-scrollbar {
    display: none;
}

.category-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 7px 18px;
    border-radius: 999px;
    border: 1px solid rgba(42, 37, 30, 0.12);
    background: #f4f1eb;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 120ms ease, box-shadow 180ms ease;
    font-family: inherit;
}

.category-pill:hover {
    background: #eae4d9;
    color: var(--text-primary);
    border-color: rgba(42, 37, 30, 0.2);
}

.category-pill.is-selected {
    background: #2a251e;
    color: #ffffff;
    border-color: #2a251e;
    box-shadow: 0 2px 8px rgba(42, 37, 30, 0.22);
}

.material-optimization-bar {
    display: grid;
    grid-template-columns: auto auto auto auto minmax(180px, 1fr);
    align-items: center;
    gap: 8px;
    margin: -4px 0 12px;
    padding: 8px;
    border: 1px solid var(--divider);
    border-radius: 8px;
    background: var(--surface-secondary);
}

.material-optimization-bar label {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--text-secondary);
    font-size: 10px;
    white-space: nowrap;
}

.material-optimization-bar select,
.material-optimization-bar button {
    min-height: 34px;
    border: 1px solid var(--divider);
    border-radius: 6px;
    font: inherit;
}

.material-optimization-bar select {
    padding: 0 26px 0 9px;
    background: var(--surface);
    color: var(--text-primary);
}

.material-optimization-bar button {
    padding: 0 13px;
    background: var(--action);
    color: #fff;
    border-color: var(--action);
    font-size: 11px;
    font-weight: 650;
    cursor: pointer;
}

.material-optimization-bar button:disabled {
    cursor: progress;
    opacity: 0.58;
}

#material-optimization-status {
    min-width: 0;
    color: var(--text-secondary);
    font-size: 10px;
    line-height: 1.4;
}

#material-optimization-status[data-level="success"] { color: #248a3d; }
#material-optimization-status[data-level="warning"] { color: #9b6700; }
#material-optimization-status[data-level="error"] { color: #c9342c; }

.dining-light-bar {
    display: grid;
    grid-template-columns: repeat(5, minmax(150px, 1fr));
    align-items: center;
    gap: 10px;
    margin: -4px 0 10px;
    padding: 9px 10px;
    border: 1px solid rgba(177, 111, 24, 0.24);
    border-radius: 8px;
    background: rgba(177, 111, 24, 0.055);
}

.dining-light-bar label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 10px;
    white-space: nowrap;
}

.dining-light-bar select,
.dining-light-bar button {
    min-height: 34px;
    border: 1px solid var(--divider);
    border-radius: 6px;
    font: inherit;
}

.dining-light-bar select {
    min-width: 132px;
    padding: 0 26px 0 9px;
    background: var(--surface);
    color: var(--text-primary);
}

.dining-light-copy {
    grid-column: 1 / -1;
    display: flex;
    min-width: 0;
    flex-direction: column;
    gap: 2px;
}

.dining-light-copy strong {
    color: var(--text-primary);
    font-size: 10px;
    font-weight: 650;
}

.dining-light-copy span {
    color: var(--text-secondary);
    font-size: 10px;
    line-height: 1.4;
}

#dining-light-description[data-camera-proxy="true"] {
    color: #875a16;
}

.dining-light-bar button {
    padding: 0 13px;
    border-color: #815a27;
    background: #815a27;
    color: #fff;
    font-size: 11px;
    font-weight: 650;
    cursor: pointer;
    white-space: nowrap;
}

.dining-light-bar button:disabled {
    cursor: progress;
    opacity: 0.58;
}

.material-preference-summary {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    margin: -5px 0 12px;
    padding: 7px 9px;
    border: 1px solid rgba(180, 140, 60, 0.22);
    border-radius: 7px;
    background: rgba(180, 140, 60, 0.06);
    color: var(--text-secondary);
    font-size: 10px;
}

#material-preference-source {
    flex: 0 0 auto;
    font-weight: 650;
    color: var(--text-primary);
}

#material-preference-targets {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#material-preference-open {
    flex: 0 0 auto;
    min-height: 28px;
    padding: 0 10px;
    border: 1px solid var(--divider);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text-primary);
    font: inherit;
    cursor: pointer;
}

/* ---- Material Selector Grid ---- */

.material-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 7px;
    margin-bottom: 12px;
}

.material-selector button {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    align-items: center;
    gap: 8px;
    min-width: 0;
    min-height: 58px;
    padding: 6px;
    border: 1px solid var(--divider);
    border-radius: 8px;
    background: var(--surface-secondary);
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.material-selector button:hover { border-color: rgba(0, 113, 227, 0.35); }
.material-selector button.is-selected {
    border-color: var(--action);
    background: var(--action-soft);
    box-shadow: inset 0 0 0 1px rgba(0, 113, 227, 0.12);
}

/* Engineering-approximation materials get a subtle dashed-left treatment */
.material-selector button.is-engineering {
    border-left-style: dashed;
    border-left-color: rgba(180, 140, 60, 0.45);
}

/* ---- Material Thumbnail (atlas-based) ---- */

.material-thumb {
    width: 44px;
    aspect-ratio: 1;
    border-radius: 6px;
    background-color: #ddd;
    background-image: var(--texture-url, none);
    background-position: var(--texture-x, 50%) var(--texture-y, 50%);
    background-size: var(--texture-size, cover);
    background-blend-mode: normal;
    background-repeat: no-repeat;
    filter: var(--appearance-filter, none);
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12);
    position: relative;
    overflow: hidden;
}

#material-panel .material-thumb::after {
    content: none;
}

/* Quality indicator dot inside thumbnail corner */
.material-thumb-quality {
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1.5px solid #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.18);
}
.material-thumb-quality--measured { background: #248a3d; }
.material-thumb-quality--engineering { background: #d4a017; }
.material-thumb-quality--user { background: #0071e3; }

.material-selector-copy,
.material-selector-copy strong,
.material-selector-copy small {
    display: block;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-selector-copy strong {
    font-size: 11px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.material-selector-copy small { margin-top: 4px; color: var(--text-secondary); font-size: 9px; }

/* Inline data-quality badge within selector item */
.selector-quality-tag {
    display: inline-block;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 8px;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.02em;
    flex-shrink: 0;
}
.selector-quality-tag--measured { background: #dcfce7; color: #166534; }
.selector-quality-tag--engineering { background: #fef3c7; color: #92400e; }
.selector-quality-tag--user { background: #dbeafe; color: #1e40af; }

/* ---- Material Detail ---- */

.material-detail {
    display: grid;
    grid-template-columns: minmax(150px, .8fr) minmax(300px, 1.8fr) minmax(260px, 1.55fr);
    gap: 10px;
    align-items: stretch;
}

.material-detail-copy,
.material-compare,
.material-metric {
    border-radius: 8px;
    background: var(--surface-secondary);
    min-width: 0;
    overflow: hidden;
}

.material-detail-copy {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 214px;
    padding: 14px;
}
.material-detail h3 { font-size: 15px; }
.material-detail-copy p { max-width: 26ch; }

.material-detail-copy .material-category {
    display: inline-flex;
    margin: 10px 5px 0 0;
    padding: 4px 7px;
    border-radius: 999px;
    background: rgba(0, 113, 227, 0.08);
    color: var(--action);
    font-size: 10px;
}

/* ---- Dual-Source Badges ---- */

.material-source-badges {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 10px;
    min-width: 0;
    overflow: hidden;
}

.source-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 10px;
    line-height: 1.4;
    background: var(--surface-secondary);
    border: 1px solid var(--divider);
    min-width: 0;
    overflow: hidden;
}

.source-badge__indicator {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}
.source-badge__indicator--measured { background: #248a3d; }
.source-badge__indicator--engineering { background: #d4a017; }
.source-badge__indicator--user { background: #0071e3; }

.source-badge__label {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    min-width: 4em;
}

.source-badge__value {
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.source-badge__value a {
    color: var(--action);
    text-decoration: none;
}
.source-badge__value a:hover { text-decoration: underline; }

/* ---- Material Compare (side-by-side) ---- */

.material-compare {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 8px;
    min-height: 214px;
    padding: 10px;
}

.material-compare figure { min-width: 0; margin: 0; }
.material-compare figcaption {
    display: flex;
    justify-content: space-between;
    gap: 5px;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 9px;
}

/* Material appearance swatch — atlas texture with color blend */
.material-appearance {
    position: relative;
    min-height: 148px;
    overflow: hidden;
    border-radius: 7px;
    background-color: #ddd;
    background-image: var(--texture-url, none);
    background-position: var(--texture-x, 50%) var(--texture-y, 50%);
    background-size: var(--texture-size, cover);
    background-blend-mode: normal;
    background-repeat: no-repeat;
    filter: var(--appearance-filter, none);
    box-shadow: inset 0 0 0 1px rgb(0 0 0 / 10%);
}

/* Do not show an invented food texture when no reliable local photo exists. */
.dining-panel .material-thumb.is-placeholder,
.dining-panel .material-appearance.is-placeholder {
    background: repeating-linear-gradient(135deg, #f1f2f4 0, #f1f2f4 10px, #e6e8eb 10px, #e6e8eb 20px);
}

.dining-panel .material-thumb.is-placeholder::after,
.dining-panel .material-appearance.is-placeholder::after {
    content: '暂无实拍图';
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: #6b7280;
    font-size: 11px;
    font-weight: 600;
    text-align: center;
}

.dining-panel .material-thumb.is-placeholder::after {
    font-size: 8px;
}

#material-panel .material-appearance::after {
    content: none;
}

.material-compare-arrow { color: var(--text-secondary); font-size: 16px; }

/* ---- Metrics Grid ---- */

.material-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.material-metric {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
    min-height: 103px;
    padding: 12px;
}

.material-metric span,
.material-metric small { display: block; }
.material-metric span { color: var(--text-secondary); font-size: 10px; }
.material-metric strong {
    display: block;
    margin: 4px 0 2px;
    color: var(--text-primary);
    font-size: 19px;
    font-variant-numeric: tabular-nums;
}
.material-metric small { color: var(--text-secondary); font-size: 9px; line-height: 1.35; }
.material-metric[data-level="low"] strong { color: var(--health); }
.material-metric[data-level="medium"] strong { color: #a86b00; }
.material-metric[data-level="high"] strong { color: #c9342c; }

/* ---- Reflectance Chart ---- */

.material-reflectance {
    display: grid;
    grid-template-columns: minmax(160px, .45fr) minmax(0, 2.55fr);
    gap: 12px;
    align-items: center;
    margin-top: 10px;
    padding: 12px;
    border-radius: 8px;
    background: var(--surface-secondary);
    min-width: 0;
    overflow: hidden;
}

.material-reflectance > div:first-child {
    min-width: 0;
    overflow: hidden;
}

.material-reflectance h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* Reflectance source quality tag next to chart title */
.reflectance-source-tag {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.02em;
}
.reflectance-source-tag--measured { background: #dcfce7; color: #166534; }
.reflectance-source-tag--engineering { background: #fef3c7; color: #92400e; }
.reflectance-source-tag--user { background: #dbeafe; color: #1e40af; }

.material-reflectance p {
    margin: 4px 0 0;
    color: var(--text-secondary);
    font-size: 10px;
    line-height: 1.45;
}

.material-reflectance small {
    display: block;
    margin-top: 7px;
    color: var(--text-secondary);
    font-size: 9px;
    line-height: 1.4;
}

#material-reflectance-canvas {
    display: block;
    width: 100%;
    height: 150px;
}

/* ---- Footer ---- */

.material-panel-footer {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    margin-top: 12px;
}

/* ---- Import Material Button ---- */

.import-material-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 100%;
    min-height: 58px;
    padding: 6px;
    border: 1px dashed var(--divider);
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
}
.import-material-btn:hover {
    border-color: var(--action);
    background: var(--action-soft);
    color: var(--action);
}

/* ---- Preference and upload dialogs ---- */

.material-preference-overlay,
.material-upload-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.35);
    backdrop-filter: blur(4px);
}
.material-preference-overlay[hidden],
.material-upload-overlay[hidden] {
    display: none;
}

.material-preference-dialog {
    width: min(620px, calc(100vw - 32px));
    max-height: 90vh;
    overflow-y: auto;
    padding: 22px;
    border-radius: 14px;
    background: var(--surface);
    box-shadow: 0 8px 40px rgba(0,0,0,0.18);
}

.material-preference-dialog__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.material-preference-dialog__header h2 {
    margin: 0 0 4px;
    color: var(--text-primary);
    font-size: 18px;
}

.material-preference-dialog__header p,
.material-preference-help {
    margin: 0;
    color: var(--text-secondary);
    font-size: 11px;
    line-height: 1.5;
}

#material-preference-cancel {
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: 50%;
    background: var(--surface-secondary);
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
}

.material-preference-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.material-preference-form label {
    display: grid;
    gap: 5px;
    color: var(--text-primary);
    font-size: 11px;
    font-weight: 600;
}

.material-preference-form input {
    width: 100%;
    min-height: 36px;
    padding: 6px 9px;
    box-sizing: border-box;
    border: 1px solid var(--divider);
    border-radius: 7px;
    background: var(--surface-secondary);
    color: var(--text-primary);
    font: inherit;
}

.material-preference-error {
    margin: 10px 0 0;
    color: #c9342c;
    font-size: 11px;
}

.material-preference-help { margin-top: 12px; }

.material-preference-dialog__actions {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-top: 18px;
}

.material-preference-dialog__actions button {
    min-height: 36px;
    padding: 0 14px;
    border: 1px solid var(--divider);
    border-radius: 7px;
    background: var(--surface-secondary);
    color: var(--text-primary);
    font: inherit;
    cursor: pointer;
}

#material-preference-save {
    margin-left: auto;
    border-color: var(--action);
    background: var(--action);
    color: #fff;
}

.material-upload-dialog {
    width: min(520px, calc(100vw - 48px));
    max-height: 90vh;
    overflow-y: auto;
    padding: 24px;
    border-radius: 14px;
    background: var(--surface);
    box-shadow: 0 8px 40px rgba(0,0,0,0.18);
}

.material-upload-dialog h2 {
    margin: 0 0 6px;
    font-size: 18px;
    color: var(--text-primary);
}

.material-upload-dialog p {
    margin: 0 0 18px;
    font-size: 12px;
    color: var(--text-secondary);
}

.upload-field {
    margin-bottom: 16px;
}
.upload-field label {
    display: block;
    margin-bottom: 4px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}
.upload-field input[type="text"],
.upload-field select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--divider);
    border-radius: 7px;
    font-size: 13px;
    font-family: inherit;
    background: var(--surface-secondary);
    color: var(--text-primary);
    box-sizing: border-box;
}

.upload-drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 28px 16px;
    border: 2px dashed var(--divider);
    border-radius: 10px;
    background: var(--surface-secondary);
    cursor: pointer;
    transition: border-color 180ms ease, background 180ms ease;
    text-align: center;
}
.upload-drop-zone:hover,
.upload-drop-zone.is-dragover {
    border-color: var(--action);
    background: var(--action-soft);
}
.upload-drop-zone span { font-size: 12px; color: var(--text-secondary); }
.upload-drop-zone strong { color: var(--action); }

.upload-preview {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    padding: 8px;
    border-radius: 7px;
    background: var(--surface-secondary);
    font-size: 11px;
    color: var(--text-secondary);
}
.upload-preview img {
    width: 40px;
    height: 40px;
    border-radius: 5px;
    object-fit: cover;
}

.upload-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 20px;
}

.upload-dialog-actions button {
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background 180ms ease, box-shadow 180ms ease;
}
.upload-dialog-cancel {
    border: 1px solid var(--divider);
    background: var(--surface-secondary);
    color: var(--text-primary);
}
.upload-dialog-cancel:hover { background: #ececf0; }
.upload-dialog-submit {
    border: none;
    background: var(--action);
    color: #fff;
}
.upload-dialog-submit:hover {
    background: #0077ed;
    box-shadow: 0 2px 8px rgba(0, 113, 227, 0.3);
}
.upload-dialog-submit:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* ---- User Material Delete Button ---- */

.material-delete-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-left: auto;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    transition: background 120ms ease, color 120ms ease;
}
.material-delete-btn:hover {
    background: rgba(201, 52, 44, 0.1);
    color: #c9342c;
}

/* ---- Panel Note ---- */
.material-panel-note {
    margin-top: 10px;
    padding: 8px 10px;
    border-radius: 6px;
    background: rgba(180, 140, 60, 0.07);
    color: var(--text-secondary);
    font-size: 10px;
    line-height: 1.5;
}

.material-result-summary {
    display: grid;
    grid-template-columns: minmax(230px, .9fr) minmax(0, 1.8fr);
    gap: 10px;
    align-items: stretch;
    margin: 10px 0 12px;
    padding: 10px 12px;
    border: 1px solid rgba(84, 69, 48, .14);
    border-radius: 10px;
    background: rgba(255, 255, 255, .58);
}

.material-result-summary[hidden] { display: none; }

.material-result-summary-copy {
    display: grid;
    align-content: center;
    gap: 3px;
    min-width: 0;
}

.material-result-summary-copy strong {
    color: var(--text-primary);
    font-size: 12px;
}

.material-result-summary-copy span {
    overflow: hidden;
    color: var(--text-secondary);
    font-size: 10px;
    line-height: 1.35;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-result-metrics {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 6px;
    min-width: 0;
}

.material-result-metric {
    display: grid;
    align-content: center;
    gap: 1px;
    min-width: 0;
    padding: 6px 7px;
    border-radius: 7px;
    background: rgba(42, 37, 30, .045);
}

.material-result-metric span,
.material-result-metric small {
    overflow: hidden;
    color: var(--text-secondary);
    font-size: 9px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-result-metric strong {
    overflow: hidden;
    color: var(--text-primary);
    font-size: 12px;
    font-variant-numeric: tabular-nums;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-technical-details {
    margin-top: 12px;
    overflow: hidden;
    border: 1px solid var(--divider);
    border-radius: 9px;
    background: var(--surface-secondary);
}

.material-technical-details[hidden] { display: none; }

.material-technical-details > summary {
    min-height: 36px;
    padding: 9px 11px;
    color: var(--text-secondary);
    font-size: 10px;
    cursor: pointer;
}

.material-technical-details[open] > summary {
    border-bottom: 1px solid var(--divider);
}

.material-technical-details .optimization-comparison {
    margin: 0;
    padding: 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
}

.optimization-comparison {
    margin: 12px 0 16px;
    padding: 14px;
    border: 1px solid rgba(84, 69, 48, .14);
    border-radius: 12px;
    background: rgba(255, 255, 255, .52);
}

.optimization-comparison[hidden] { display: none; }

.optimization-comparison-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.optimization-comparison-header div {
    display: grid;
    gap: 3px;
}

.optimization-comparison-header span,
.dining-optimization-status {
    color: var(--text-secondary);
    font-size: 11px;
}

.optimization-comparison canvas {
    display: block;
    width: 100%;
    height: 220px;
    border-radius: 8px;
    background: rgba(250, 248, 243, .78);
}

.optimization-comparison-metrics,
.optimization-comparison-channels {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    margin-top: 10px;
}

.optimization-metric-row,
.optimization-channel-row {
    display: grid;
    gap: 3px;
    min-width: 0;
    padding: 9px 10px;
    border-radius: 8px;
    background: rgba(42, 37, 30, .045);
}

.optimization-metric-row span,
.optimization-channel-row span,
.optimization-metric-row small,
.optimization-channel-row small {
    color: var(--text-secondary);
    font-size: 10px;
}

.optimization-metric-row strong,
.optimization-channel-row strong {
    font-size: 12px;
    overflow-wrap: anywhere;
}

.dining-panel { min-width: 0; }
.dining-optimization-status { display: block; margin: 0 0 10px; }
.dining-optimization-status[data-level="success"],
.dining-optimization-status[data-tone="success"] { color: #248a3d; }
.dining-optimization-status[data-level="warning"],
.dining-optimization-status[data-tone="warning"] { color: #9b6700; }
.dining-optimization-status[data-level="error"],
.dining-optimization-status[data-tone="error"] { color: #c9342c; }

.dining-food-tools {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin: 12px 0 10px;
    padding: 10px 12px;
    border: 1px solid var(--divider);
    border-radius: 9px;
    background: var(--surface-secondary);
}
.dining-food-tools > div { display: grid; gap: 3px; min-width: 0; }
.dining-food-tools strong { font-size: 12px; color: var(--text-primary); }
.dining-food-tools span { font-size: 10px; color: var(--text-secondary); line-height: 1.45; }
.dining-food-tools button {
    flex: 0 0 auto;
    min-height: 34px;
    padding: 0 13px;
    border: 1px solid var(--action);
    border-radius: 7px;
    background: var(--action);
    color: #fff;
    font: inherit;
    cursor: pointer;
}

.dining-food-selector-item { position: relative; min-width: 0; }
.dining-food-selector-item > button:first-child { width: 100%; height: 100%; }
.dining-food-selector-item > button.is-inactive {
    opacity: .48;
    filter: saturate(.65);
}
.dining-food-selector-item > button.is-inactive:hover,
.dining-food-selector-item > button.is-inactive.is-selected {
    opacity: .82;
}
.dining-food-selector-item > button.is-inactive .material-selector-copy small { color: #8a6b35; }
.dining-material-selector .dining-food-delete {
    position: absolute;
    top: 4px;
    right: 4px;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    min-height: 20px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: rgba(20, 20, 20, .68);
    color: #fff;
    font-size: 15px;
    line-height: 1;
}

.dining-food-upload-dialog h3 { margin: 0 0 4px; font-size: 18px; }
.dining-food-upload-dialog .upload-dialog-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 16px;
}
.dining-food-upload-dialog .upload-dialog-header p { margin: 0; }
#dining-food-upload-cancel {
    width: 30px;
    height: 30px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--surface-secondary);
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
}
.dining-food-upload-dialog .upload-field {
    display: grid;
    gap: 6px;
    margin-bottom: 14px;
    color: var(--text-primary);
    font-size: 11px;
    font-weight: 600;
}
.dining-food-upload-dialog .upload-field small {
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 400;
    line-height: 1.45;
}
.dining-food-upload-dialog input[type="text"],
.dining-food-upload-dialog input[type="file"],
.dining-food-upload-dialog select {
    width: 100%;
    box-sizing: border-box;
    padding: 8px 10px;
    border: 1px solid var(--divider);
    border-radius: 7px;
    background: var(--surface-secondary);
    color: var(--text-primary);
    font: inherit;
}
.dining-food-photo-preview {
    min-height: 180px;
    margin-bottom: 12px;
    border-radius: 9px;
    background-position: center;
    background-size: cover;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,.1);
}
.dining-food-upload-dialog .upload-error { margin: 0 0 10px; color: #c9342c; }
#dining-food-upload-submit {
    border-color: var(--action);
    background: var(--action);
    color: #fff;
}
#dining-food-upload-submit:disabled { opacity: .45; cursor: not-allowed; }
.dining-optimization-status[data-level="success"] { color: #248a3d; }
.dining-optimization-status[data-level="warning"] { color: #9b6700; }
.dining-optimization-status[data-level="error"] { color: #c9342c; }

.dining-material-detail {
    display: grid;
    grid-template-columns: minmax(180px, .7fr) minmax(0, 2fr);
    gap: 14px;
    margin-top: 14px;
}

.dining-compare {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.dining-compare figure {
    display: grid;
    grid-template-rows: minmax(150px, 1fr) auto;
    min-width: 0;
    min-height: 190px;
    margin: 0;
}

.dining-material-metrics {
    grid-column: 1 / -1;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* Dining workflow: inputs first, computed validation second. */
.dining-workflow-step {
    margin-top: 12px;
    padding: 14px;
    border: 1px solid var(--divider);
    border-radius: 10px;
    background: var(--surface-secondary);
}

.dining-step-heading {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
}

.dining-step-heading > span {
    display: grid;
    place-items: center;
    flex: 0 0 24px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--action);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
}

.dining-step-heading > div { display: grid; gap: 3px; min-width: 0; }
.dining-step-heading h3 { margin: 0; font-size: 13px; }
.dining-step-heading p { margin: 0; color: var(--text-secondary); font-size: 10px; line-height: 1.5; }
.dining-step-heading--action button {
    margin-left: auto;
    min-height: 32px;
    padding: 0 12px;
    border: 1px solid var(--action);
    border-radius: 7px;
    background: transparent;
    color: var(--action);
    font: inherit;
    cursor: pointer;
}

.dining-workflow-step .dining-light-bar { margin: 0; }
.dining-execute-step {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 6px 16px;
}
.dining-execute-step .dining-step-heading { margin: 0; }
.dining-execute-step #dining-light-apply {
    min-width: 180px;
    min-height: 38px;
    border: 0;
    border-radius: 8px;
    background: var(--action);
    color: #fff;
    font: inherit;
    font-weight: 650;
    cursor: pointer;
}
.dining-execute-step .dining-optimization-status { grid-column: 1 / -1; margin: 0 0 0 34px; }
.dining-results { display: grid; gap: 12px; margin-top: 12px; }

.dining-food-validation {
    display: grid;
    grid-template-columns: minmax(220px, .75fr) minmax(0, 2fr);
    gap: 14px;
    padding: 14px;
    border: 1px solid var(--divider);
    border-radius: 10px;
    background: var(--surface-primary, #fff);
}
.dining-food-identity-card { display: grid; gap: 10px; align-content: start; min-width: 0; }
.dining-food-identity-card .material-detail-copy { min-height: 0; padding: 0; background: transparent; }
.dining-food-identity-card figure { display: grid; gap: 6px; min-width: 0; margin: 0; }
.dining-food-identity-card .material-appearance { min-height: 190px; border-radius: 9px; filter: none; }
.dining-food-identity-card figcaption { color: var(--text-secondary); font-size: 9px; line-height: 1.4; }
.dining-color-validation { display: grid; gap: 10px; min-width: 0; align-content: start; }
.dining-validation-heading > div { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.dining-validation-heading strong { font-size: 12px; }
.dining-validation-heading span { color: var(--text-secondary); font-size: 9px; }
.dining-swatch-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.dining-swatch-item { display: grid; gap: 5px; min-width: 0; }
.dining-color-swatch {
    display: flex;
    align-items: flex-end;
    min-height: 112px;
    padding: 9px;
    box-sizing: border-box;
    border: 1px solid rgba(0, 0, 0, .1);
    border-radius: 8px;
    background: rgb(218, 218, 218);
    color: rgba(0, 0, 0, .72);
    font-size: 10px;
    font-weight: 700;
    text-shadow: 0 1px 1px rgba(255, 255, 255, .45);
}
.dining-swatch-item small { color: var(--text-secondary); font-size: 9px; font-variant-numeric: tabular-nums; }
.dining-food-validation .dining-material-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
    min-height: 0;
}
.dining-food-validation .dining-material-metrics > span {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 8px;
    min-width: 0;
    padding: 8px 9px;
    border-radius: 7px;
    background: rgba(42, 37, 30, .045);
}
.dining-food-validation .dining-material-metrics small { color: var(--text-secondary); font-size: 9px; }
.dining-food-validation .dining-material-metrics strong { font-size: 11px; font-variant-numeric: tabular-nums; }

/* Compact image-first dining result. */
.dining-result-strip {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 9px;
    background: rgba(145, 94, 26, .08);
}
.dining-result-strip strong { flex: 0 0 auto; font-size: 12px; }
.dining-result-strip span { color: var(--text-secondary); font-size: 10px; }
.dining-result-strip .dining-baseline-summary {
    margin-left: auto;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}
.dining-food-validation {
    grid-template-columns: minmax(150px, .48fr) minmax(0, 2fr);
    align-items: start;
    padding: 12px;
}
.dining-validation-title { display: grid; gap: 6px; min-width: 0; }
.dining-validation-title h3 { margin: 3px 0 0; font-size: 16px; }
.dining-validation-title p { margin: 0; color: var(--text-secondary); font-size: 10px; line-height: 1.45; }
.dining-validation-title small { color: var(--text-secondary); font-size: 9px; line-height: 1.45; }
.dining-photo-compare { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.dining-photo-compare figure { display: grid; gap: 5px; min-width: 0; margin: 0; }
.dining-food-preview { display: block; width: 100%; height: auto; aspect-ratio: 21 / 13; border-radius: 8px; background: #d8d8d8; }
.dining-photo-compare figcaption { display: flex; justify-content: space-between; gap: 8px; font-size: 9px; }
.dining-photo-compare figcaption span { color: var(--text-secondary); }
.dining-food-validation > .dining-material-metrics { grid-column: 2; margin-top: 0; }
.dining-technical-details {
    border: 1px solid var(--divider);
    border-radius: 9px;
    background: var(--surface-secondary);
}
.dining-technical-details > summary { padding: 10px 12px; color: var(--text-secondary); font-size: 10px; cursor: pointer; }
.dining-technical-details[open] > summary { border-bottom: 1px solid var(--divider); }
.dining-technical-details .optimization-comparison,
.dining-technical-details .material-reflectance { margin: 10px; }

@media (min-width: 1181px) {
    .dining-workflow-step { padding: 11px 12px; }
    .dining-step-heading { margin-bottom: 8px; }
    .dining-material-selector { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 681px) and (max-width: 1180px) {
    .dining-workflow-step { padding: 11px 12px; }
    .dining-step-heading { margin-bottom: 8px; }
    .dining-light-bar { grid-template-columns: repeat(3, minmax(150px, 1fr)); }
    .dining-material-selector { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

#dining-target-summary {
    color: var(--text-secondary);
    font-size: 10px;
}

/* ---- Responsive ---- */

@media (max-width: 1280px) {
    .material-result-summary { grid-template-columns: 1fr; }
    .material-result-summary-copy { grid-template-columns: auto minmax(0, 1fr); }
    .material-result-summary-copy strong { grid-column: 1 / -1; }
    .material-result-metrics { grid-template-columns: repeat(5, minmax(90px, 1fr)); }
    .material-selector { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .material-detail { grid-template-columns: minmax(180px, .8fr) minmax(320px, 1.5fr); }
    .material-metrics { grid-column: 1 / -1; grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .material-detail-copy,
    .material-compare { min-height: 200px; }
    .material-metric { min-height: 86px; }
}

@media (max-width: 1180px) {
    .material-detail { grid-template-columns: 1fr; }
    .material-metrics { grid-column: auto; }
    .material-detail-copy { min-height: 0; }
}

@media (max-width: 680px) {
    .material-result-summary { padding: 9px; }
    .material-result-summary-copy { grid-template-columns: 1fr; }
    .material-result-summary-copy strong { grid-column: auto; }
    .material-result-summary-copy span { white-space: normal; }
    .material-result-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .material-result-metric:last-child { grid-column: 1 / -1; }
    .dining-result-strip { flex-wrap: wrap; }
    .dining-result-strip .dining-baseline-summary { flex-basis: 100%; margin-left: 0; }
    .material-panel-header { align-items: flex-start; flex-direction: column; gap: 8px; }
    .optimization-comparison-metrics,
    .optimization-comparison-channels { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .optimization-comparison canvas { height: 190px; }
    .dining-material-detail { grid-template-columns: 1fr; }
    .dining-compare { grid-template-columns: 1fr; }
    .dining-step-heading--action { flex-wrap: wrap; }
    .dining-step-heading--action button { width: 100%; margin-left: 34px; }
    .dining-execute-step { grid-template-columns: 1fr; }
    .dining-execute-step #dining-light-apply { width: 100%; min-width: 0; }
    .dining-execute-step .dining-optimization-status { grid-column: auto; margin-left: 0; }
    .dining-food-validation { grid-template-columns: 1fr; }
    .dining-validation-title { grid-column: 1; }
    .dining-photo-compare { grid-template-columns: 1fr; }
    .dining-food-validation > .dining-material-metrics { grid-column: 1; }
    .dining-swatch-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .dining-color-swatch { min-height: 84px; padding: 7px; }
    .dining-food-validation .dining-material-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .dining-material-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .material-optimization-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .material-optimization-bar label { justify-content: space-between; }
    .material-optimization-bar button,
    #material-optimization-status { grid-column: 1 / -1; }
    .dining-light-bar { grid-template-columns: 1fr; }
    .dining-light-bar label { justify-content: space-between; }
    .dining-light-bar button { width: 100%; }
    .dining-food-tools { align-items: stretch; flex-direction: column; }
    .dining-food-tools button { width: 100%; }
    .material-selector { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .material-compare { grid-template-columns: 1fr; }
    .material-compare-arrow { display: none; }
    .material-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .material-metric { min-height: 92px; }
    .material-reflectance { grid-template-columns: 1fr; }
}

/* Scheme A material verification layout. */
.material-detail {
    display: grid;
    grid-template-columns: minmax(180px, .75fr) minmax(180px, 1fr) minmax(180px, 1fr) minmax(170px, .7fr);
    gap: 14px;
    align-items: stretch;
}

.material-detail-copy,
.material-compare figure,
.material-metrics {
    min-width: 0;
    min-height: 190px;
}

.material-detail > .material-compare {
    display: contents;
}

.material-compare-arrow {
    display: none;
}

.material-compare figure {
    display: grid;
    grid-template-rows: minmax(150px, 1fr) auto;
    margin: 0;
}

.material-appearance {
    width: 100%;
    height: 100%;
    min-height: 150px;
}

.material-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.material-reflectance {
    display: block;
    margin-top: 14px;
    padding: 0;
}

.material-reflectance > summary {
    min-height: 34px;
    padding: 8px 10px;
    cursor: pointer;
    color: var(--text-secondary);
}

.material-reflectance:not([open]) > :not(summary) {
    display: none;
}

.material-reflectance[open] {
    display: grid;
    grid-template-columns: minmax(160px, .35fr) minmax(0, 1fr);
    gap: 14px;
    padding: 10px;
}

@media (max-width: 1200px) {
    .material-detail {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .material-metrics { min-height: 0; }
}

@media (max-width: 720px) {
    .material-detail { grid-template-columns: 1fr; }
    .material-detail-copy,
    .material-compare figure,
    .material-metrics { min-height: 0; }
    .material-reflectance[open] { grid-template-columns: 1fr; }
}

@media print {
    .material-selector { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}