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svg{flex:none;margin-block-start:var(--space-thumb-3xs)}.thumbnail-field-status--error{color:var(--color-thumb-error)}.thumbnail-field-status--success{color:var(--color-thumb-success)}.thumbnail-field-row{gap:var(--space-thumb-md);grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-width:0;display:grid}.thumbnail-field-row .thumbnail-field{margin:0}.thumbnail-field-row .thumbnail-field--short{grid-template-columns:minmax(0,.45fr)}.thumbnail-button,.thumbnail-icon-button,.thumbnail-quality-button,.thumbnail-segmented-control button,.thumbnail-vision-control button,.thumbnail-file-button,.thumbnail-variant-row button,.youtube-preview-card{font-family:var(--font-thumb-body)}.thumbnail-button{justify-content:center;align-items:center;gap:var(--space-thumb-xs);min-height:48px;padding:var(--space-thumb-sm) var(--space-thumb-md);border:var(--rule-thumb) solid 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svg,.thumbnail-inspection-bar>p svg{flex:none;margin-block-start:var(--space-thumb-3xs)}.thumbnail-result-intro{justify-content:space-between;align-items:flex-start;gap:var(--space-thumb-lg);display:flex}.thumbnail-result-intro h2{max-width:30ch;font-size:var(--text-thumb-xl);overflow-wrap:anywhere;margin-block-start:var(--space-thumb-2xs)}.thumbnail-micro-label{color:var(--color-thumb-accent);font-family:var(--font-thumb-mono);font-size:var(--text-thumb-xs);letter-spacing:.08em;text-transform:uppercase;font-weight:700}.thumbnail-text-link{align-items:center;gap:var(--space-thumb-xs);min-height:44px;color:var(--color-thumb-accent);font-size:var(--text-thumb-sm);text-underline-offset:var(--space-thumb-2xs);white-space:nowrap;flex:none;font-weight:700;text-decoration:underline;display:inline-flex}.thumbnail-primary-figure{margin:var(--space-thumb-lg) 0 0}.thumbnail-primary-figure img{aspect-ratio:16/9;background:var(--color-thumb-paper-muted);object-fit:contain;width:100%;height:auto;display:block}.thumbnail-primary-figure figcaption{justify-content:space-between;align-items:center;gap:var(--space-thumb-md);padding-block:var(--space-thumb-sm);border-block-end:var(--rule-thumb) solid var(--color-thumb-rule);color:var(--color-thumb-ink-muted);font-family:var(--font-thumb-mono);font-size:var(--text-thumb-xs);font-variant-numeric:tabular-nums;display:flex}.thumbnail-primary-figure figcaption strong{color:var(--color-thumb-ink)}.thumbnail-quality-list{gap:var(--space-thumb-xs);grid-template-columns:repeat(auto-fit,minmax(7.5rem,1fr));margin-block-start:var(--space-thumb-md);display:grid}.thumbnail-quality-button{min-height:58px;padding:var(--space-thumb-xs) var(--space-thumb-sm);border:var(--rule-thumb) solid var(--color-thumb-rule);border-radius:var(--radius-thumb-small);background:var(--color-thumb-paper);color:var(--color-thumb-ink);cursor:pointer;text-align:start;transition:background-color var(--dur-thumb-short) var(--ease-thumb-out), border-color var(--dur-thumb-short) var(--ease-thumb-out), transform var(--dur-thumb-micro) var(--ease-thumb-out)}.thumbnail-quality-button[aria-pressed=true]{border-color:var(--color-thumb-accent);background:var(--color-thumb-accent-soft)}.thumbnail-quality-button span,.thumbnail-quality-button small{white-space:nowrap;display:block}.thumbnail-quality-button span{font-size:var(--text-thumb-sm);font-weight:700}.thumbnail-quality-button 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var(--space-thumb-md);border:var(--rule-thumb) solid var(--color-thumb-rule-strong);border-radius:var(--radius-thumb-control);background:var(--color-thumb-paper);color:var(--color-thumb-ink);cursor:pointer;font-size:var(--text-thumb-sm);white-space:nowrap;transition:background-color var(--dur-thumb-short) var(--ease-thumb-out), transform var(--dur-thumb-micro) var(--ease-thumb-out);font-weight:700;display:inline-flex}.thumbnail-file-button:active{transform:translateY(1px)}.thumbnail-file-button input{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.thumbnail-upload-block>p{min-height:1.5em;margin:var(--space-thumb-xs) 0 0;color:var(--color-thumb-ink-muted);font-size:var(--text-thumb-xs);line-height:1.5}.thumbnail-source-form .thumbnail-button{width:100%;margin-block-start:var(--space-thumb-xs)}.thumbnail-variant-list{gap:var(--space-thumb-xs);display:grid}.thumbnail-variant-row{align-items:center;gap:var(--space-thumb-xs);border-block-start:var(--rule-thumb) solid var(--color-thumb-rule);min-width:0;grid-template-columns:minmax(0,1fr) auto;padding-block-start:var(--space-thumb-xs);display:grid}.thumbnail-variant-row>button:first-child{align-items:center;gap:var(--space-thumb-sm);min-width:0;min-height:58px;padding:var(--space-thumb-xs);border:var(--rule-thumb) solid transparent;border-radius:var(--radius-thumb-small);color:var(--color-thumb-ink);cursor:pointer;text-align:start;transition:background-color var(--dur-thumb-short) var(--ease-thumb-out), border-color var(--dur-thumb-short) var(--ease-thumb-out), transform var(--dur-thumb-micro) var(--ease-thumb-out);background:0 0;grid-template-columns:5rem minmax(0,1fr);display:grid}.thumbnail-variant-row--selected>button:first-child{border-color:var(--color-thumb-accent);background:var(--color-thumb-accent-soft)}.thumbnail-variant-row img{aspect-ratio:16/9;object-fit:cover;width:5rem;display:block}.thumbnail-variant-row strong,.thumbnail-variant-row small{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.thumbnail-variant-row strong{font-size:var(--text-thumb-sm)}.thumbnail-variant-row small{color:var(--color-thumb-ink-muted);font-family:var(--font-thumb-mono);font-size:var(--text-thumb-xs);font-variant-numeric:tabular-nums}.thumbnail-icon-button{border:var(--rule-thumb) solid var(--color-thumb-rule);border-radius:var(--radius-thumb-control);background:var(--color-thumb-paper);width:44px;height:44px;color:var(--color-thumb-ink-muted);cursor:pointer;transition:background-color var(--dur-thumb-short) var(--ease-thumb-out), color var(--dur-thumb-short) var(--ease-thumb-out), transform var(--dur-thumb-micro) var(--ease-thumb-out);place-items:center;display:inline-grid}.thumbnail-preview-toolbar{justify-content:space-between;align-items:center;gap:var(--space-thumb-md);margin-block-end:var(--space-thumb-md);display:flex}.thumbnail-segmented-control,.thumbnail-vision-control,.thumbnail-toolbar-actions{align-items:center;gap:var(--space-thumb-2xs);display:flex}.thumbnail-segmented-control,.thumbnail-vision-control{flex-wrap:wrap}.thumbnail-segmented-control button,.thumbnail-vision-control button{min-height:44px;padding:var(--space-thumb-xs) var(--space-thumb-sm);border:var(--rule-thumb) solid transparent;border-radius:var(--radius-thumb-pill);color:var(--color-thumb-ink-muted);cursor:pointer;font-size:var(--text-thumb-xs);white-space:nowrap;transition:background-color var(--dur-thumb-short) var(--ease-thumb-out), color var(--dur-thumb-short) var(--ease-thumb-out), transform var(--dur-thumb-micro) var(--ease-thumb-out);background:0 0;font-weight:700}.thumbnail-segmented-control button[aria-pressed=true],.thumbnail-vision-control button[aria-pressed=true]{background:var(--color-thumb-accent-soft);color:var(--color-thumb-accent-strong)}.thumbnail-preview-canvas{min-height:30rem;padding:clamp(var(--space-thumb-md), 3vw, var(--space-thumb-xl));background:var(--color-thumb-paper-muted);color:var(--color-thumb-ink);transition:opacity var(--dur-thumb-short) var(--ease-thumb-in-out)}.thumbnail-preview-canvas--dark{background:var(--color-thumb-dark-canvas);color:var(--color-thumb-dark-ink)}.thumbnail-preview-grid{align-items:start;gap:var(--space-thumb-lg);grid-template-columns:repeat(auto-fit,minmax(min(17rem,100%),1fr));min-width:0;display:grid}.thumbnail-preview-canvas--search .thumbnail-preview-grid,.thumbnail-preview-canvas--sidebar .thumbnail-preview-grid,.thumbnail-preview-canvas--mobile .thumbnail-preview-grid{grid-template-columns:minmax(0,1fr)}.youtube-preview-card{border:var(--rule-thumb) solid transparent;border-radius:var(--radius-thumb-small);outline-offset:1px;min-width:0;color:var(--color-thumb-ink);cursor:pointer;text-align:start;transition:background-color var(--dur-thumb-short) var(--ease-thumb-out), border-color var(--dur-thumb-short) var(--ease-thumb-out), opacity var(--dur-thumb-short) var(--ease-thumb-out), transform var(--dur-thumb-micro) var(--ease-thumb-out);background:0 0;outline:2px solid #0000;padding:0;display:grid;position:relative;overflow:clip}.youtube-preview-card[aria-pressed=true]{border-color:var(--color-thumb-accent);outline-color:var(--color-thumb-paper)}.youtube-preview-card--dark{background:var(--color-thumb-dark-paper);color:var(--color-thumb-dark-ink)}.youtube-preview-card__image{aspect-ratio:16/9;background:var(--color-thumb-paper-strong);min-width:0;display:block;position:relative;overflow:clip}.youtube-preview-card__image img{object-fit:cover;width:100%;height:100%;transition:opacity var(--dur-thumb-short) var(--ease-thumb-in-out), transform var(--dur-thumb-short) var(--ease-thumb-in-out);display:block}.youtube-preview-card--grayscale .youtube-preview-card__image img{filter:grayscale()}.youtube-preview-card--blur .youtube-preview-card__image img{filter:blur(5px);transform:scale(1.03)}.youtube-preview-card__duration{right:var(--space-thumb-xs);bottom:var(--space-thumb-xs);padding:var(--space-thumb-3xs) var(--space-thumb-2xs);border-radius:var(--radius-thumb-small);background:var(--color-thumb-scrim);color:var(--color-thumb-dark-ink);font-family:var(--font-thumb-mono);font-size:var(--text-thumb-xs);font-variant-numeric:tabular-nums;line-height:1.25;position:absolute}.youtube-preview-card__copy{gap:var(--space-thumb-3xs);min-width:0;padding:var(--space-thumb-sm) var(--space-thumb-xs) var(--space-thumb-md);display:grid}.youtube-preview-card__copy strong{min-width:0;color:inherit;font-size:var(--text-thumb-base);overflow-wrap:anywhere;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-weight:700;line-height:1.35;display:-webkit-box;overflow:hidden}.youtube-preview-card__copy span,.youtube-preview-card__copy small{color:var(--color-thumb-ink-muted);font-size:var(--text-thumb-xs);line-height:1.4}.youtube-preview-card--dark .youtube-preview-card__copy span,.youtube-preview-card--dark .youtube-preview-card__copy small{color:var(--color-thumb-dark-muted)}.youtube-preview-card__variant{top:var(--space-thumb-xs);left:var(--space-thumb-xs);padding:var(--space-thumb-2xs) var(--space-thumb-xs);border-radius:var(--radius-thumb-pill);background:var(--color-thumb-paper);color:var(--color-thumb-ink);font-family:var(--font-thumb-mono);font-size:var(--text-thumb-xs);white-space:nowrap;font-weight:700;line-height:1.3;position:absolute}.youtube-preview-card--search,.youtube-preview-card--sidebar{grid-template-columns:minmax(7.5rem,38%) minmax(0,1fr);align-items:start}.youtube-preview-card--search .youtube-preview-card__copy,.youtube-preview-card--sidebar .youtube-preview-card__copy{padding-block-start:var(--space-thumb-xs)}.youtube-preview-card--sidebar{grid-template-columns:minmax(7.5rem,42%) minmax(0,1fr);max-width:34rem}.youtube-preview-card--sidebar .youtube-preview-card__copy strong{font-size:var(--text-thumb-sm)}.youtube-preview-card--mobile{width:min(100%,25rem)}.thumbnail-empty-state--stage{min-height:25rem}.thumbnail-inspection-bar{justify-content:space-between;align-items:center;gap:var(--space-thumb-md);padding-block:var(--space-thumb-md);border-block-end:var(--rule-thumb) solid var(--color-thumb-rule);display:flex}.thumbnail-inspection-bar>p{margin:0}.thumbnail-checks{gap:var(--space-thumb-xl);min-width:0;grid-template-columns:minmax(0,4fr) minmax(0,6fr);padding-block-start:var(--space-thumb-xl);display:grid}.thumbnail-checks h2{font-size:var(--text-thumb-lg);margin-block-start:var(--space-thumb-xs)}.thumbnail-check-list{min-width:0;display:grid}.thumbnail-check{align-items:start;gap:var(--space-thumb-sm);min-width:0;padding-block:var(--space-thumb-md);border-block-start:var(--rule-thumb) solid var(--color-thumb-rule);grid-template-columns:auto minmax(0,1fr);display:grid}.thumbnail-check>svg{margin-block-start:var(--space-thumb-3xs)}.thumbnail-check--pass>svg{color:var(--color-thumb-success)}.thumbnail-check--review>svg{color:var(--color-thumb-warning)}.thumbnail-check--fail>svg{color:var(--color-thumb-error)}.thumbnail-check strong{color:var(--color-thumb-ink);font-size:var(--text-thumb-sm)}.thumbnail-check p{margin:var(--space-thumb-2xs) 0 0;color:var(--color-thumb-ink-muted);font-size:var(--text-thumb-xs);line-height:1.55}@media (hover:hover) and (pointer:fine){.thumbnail-button--primary:hover{background:var(--color-thumb-accent-strong);transform:translateY(-1px)}.thumbnail-button--secondary:hover,.thumbnail-file-button:hover,.thumbnail-icon-button:hover,.thumbnail-quality-button:hover,.thumbnail-variant-row>button:first-child:hover{background:var(--color-thumb-paper-muted)}.thumbnail-segmented-control button:hover,.thumbnail-vision-control button:hover{color:var(--color-thumb-accent-strong)}.youtube-preview-card:hover{border-color:var(--color-thumb-rule-strong)}}@media (max-width:68rem){.thumbnail-preview-workbench{grid-template-columns:minmax(16rem,4fr) minmax(0,7fr)}.thumbnail-preview-toolbar,.thumbnail-inspection-bar,.thumbnail-checks{grid-template-columns:minmax(0,1fr);align-items:stretch}.thumbnail-preview-toolbar,.thumbnail-inspection-bar{flex-direction:column}.thumbnail-toolbar-actions{align-self:flex-start}}@media (max-width:54rem){.thumbnail-workbench,.thumbnail-preview-workbench{grid-template-columns:minmax(0,1fr)}.thumbnail-control-panel,.thumbnail-preview-controls{border-inline-end:0;border-block-end:var(--rule-thumb) solid var(--color-thumb-rule)}.thumbnail-preview-grid{grid-template-columns:repeat(auto-fit,minmax(min(15rem,100%),1fr))}}@media (max-width:40rem){.thumbnail-control-panel,.thumbnail-preview-controls,.thumbnail-result-panel,.thumbnail-preview-stage{padding:var(--space-thumb-md)}.thumbnail-field-row{grid-template-columns:minmax(0,1fr)}.thumbnail-result-intro,.thumbnail-preview-toolbar,.thumbnail-inspection-bar{flex-direction:column;align-items:stretch}.thumbnail-text-link,.thumbnail-toolbar-actions{align-self:flex-start}.thumbnail-result-actions,.thumbnail-toolbar-actions{grid-template-columns:minmax(0,1fr);width:100%;display:grid}.thumbnail-result-actions .thumbnail-button,.thumbnail-toolbar-actions .thumbnail-button{width:100%}.thumbnail-segmented-control,.thumbnail-vision-control{grid-template-columns:repeat(2,minmax(0,1fr));width:100%;display:grid}.thumbnail-segmented-control button,.thumbnail-vision-control button{min-width:0;padding-inline:var(--space-thumb-xs)}.thumbnail-preview-canvas{min-height:22rem;padding:var(--space-thumb-sm)}.youtube-preview-card--search,.youtube-preview-card--sidebar{grid-template-columns:minmax(6.75rem,42%) minmax(0,1fr)}}@media (prefers-reduced-motion:reduce){.thumbnail-button,.thumbnail-icon-button,.thumbnail-quality-button,.thumbnail-segmented-control button,.thumbnail-vision-control button,.thumbnail-file-button,.thumbnail-variant-row button,.youtube-preview-card,.youtube-preview-card__image img,.thumbnail-preview-canvas{transition-duration:var(--dur-thumb-micro)}}