:root{--thumb-purple:#5540a7;--thumb-ink:#29213d;--thumb-muted:#716980;--thumb-line:#e3ddef}.thumbnail-app{background:#f8f7fb;color:var(--thumb-ink);font-size:16px}.thumb-nav{display:flex;align-items:center;justify-content:space-between;padding:22px max(24px,calc((100vw - 1280px)/2));border-bottom:1px solid var(--thumb-line);background:#fff}.thumb-brand{font-size:25px;font-weight:800;text-decoration:none;letter-spacing:-1px;color:var(--thumb-ink)}.thumb-brand span{font-size:12px;font-weight:650;letter-spacing:0;background:#eee9f8;padding:5px 9px;border-radius:7px;margin-left:10px;color:var(--thumb-purple)}.thumb-nav nav{display:flex;gap:22px;font-size:14px}.thumb-nav a{color:var(--thumb-ink)}.thumb-main{width:min(1280px,calc(100% - 48px));margin:42px auto 60px}.thumb-intro,.thumb-editor-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.thumb-intro h1{font-size:clamp(36px,4.1vw,58px);line-height:1.12;letter-spacing:-2px;margin:12px 0}.thumb-intro p{font-size:17px;color:var(--thumb-muted)}.thumb-overline{font-size:11px!important;font-weight:750;letter-spacing:.14em;color:var(--thumb-purple)!important}.thumb-quota{font-size:12px;background:#eaf0bf;padding:11px 15px;border-radius:22px;white-space:nowrap}.thumb-main h2{font-size:25px;letter-spacing:-.6px;line-height:1.25}.thumb-main h3{font-size:16px}.thumb-main .btn{font-size:15px;min-height:46px}.thumb-main [hidden]{display:none!important}.thumb-create,.thumb-editor,.thumb-history{background:#fff;border:1px solid var(--thumb-line);border-radius:18px;padding:28px;margin:26px 0}.thumb-create-heading{display:flex;gap:14px;align-items:flex-start;margin-bottom:24px}.thumb-create-heading h2{margin:0 0 5px}.thumb-create-heading p{margin:0;color:var(--thumb-muted);font-size:14px}.thumb-step{background:#eee9f8;color:var(--thumb-purple);font-weight:750;padding:9px 12px;border-radius:10px}.thumb-main fieldset{border:0;padding:0;margin:0}.thumb-input-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:20px 0}.thumb-main label{display:block;font-size:14px;font-weight:650;margin-bottom:8px}.thumb-main label span{font-size:12px;color:var(--thumb-muted);font-weight:400}.thumb-main input:not([type=checkbox]),.thumb-main textarea,.thumb-main select{width:100%;min-height:46px;background:#fcfbfe;border:1px solid #dcd4e9;border-radius:9px;padding:11px 13px;font:inherit;font-size:15px;color:var(--thumb-ink)}.thumb-main textarea+label,.thumb-main input+label,.thumb-main select+label{margin-top:18px}.thumb-link-row{display:flex;gap:8px}.thumb-link-row .btn{white-space:nowrap}.thumb-generate-row,.thumb-export{display:flex;justify-content:space-between;align-items:center;gap:24px;border-top:1px solid var(--thumb-line);padding-top:20px;margin-top:22px}.thumb-generate-row p,.thumb-export p{font-size:12px;color:var(--thumb-muted);max-width:650px}.thumb-generate-row .btn{flex-shrink:0}.thumb-small{font-size:12px;color:var(--thumb-muted);line-height:1.6}.thumb-signin{background:#eee9f8;border:1px solid #d8cdec;border-radius:16px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 26px;margin-top:24px}.thumb-signin h2{font-size:21px;margin:0}.thumb-signin p{font-size:14px;max-width:650px;color:var(--thumb-muted)}.thumb-signin a{flex-shrink:0}#studio-status:not(:empty){padding:14px 18px;border-radius:10px;border:1px solid #e5c98d;background:#fff8e8;font-size:14px;margin:20px 0}.thumb-progress{text-align:center;padding:40px;background:#eee9f8;border-radius:16px}.thumb-progress p{font-size:14px;color:var(--thumb-muted)}.thumb-spinner{width:30px;height:30px;border:3px solid #d5cae8;border-top-color:var(--thumb-purple);border-radius:50%;animation:thumb-spin 1.2s linear infinite;margin:0 auto 18px}@keyframes thumb-spin{to{transform:rotate(360deg)}}.thumb-editor-heading{margin-bottom:22px}.thumb-editor-heading h2{margin:4px 0}#save-status{font-size:12px;color:var(--thumb-muted)}.thumb-editor-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px}.thumb-controls{border-right:1px solid var(--thumb-line);padding-right:22px}.thumb-add{display:flex;gap:7px;margin-bottom:20px}.thumb-add button{flex:1;min-width:0;background:#f5f1fb;border:1px solid var(--thumb-line);border-radius:9px;padding:12px 5px;font-size:23px;color:var(--thumb-purple);cursor:pointer}.thumb-add button span{display:block;font-size:11px;margin-top:3px}.thumb-property-row{display:flex;gap:12px;margin:15px 0}.thumb-property-row>div{flex:1;min-width:0}.thumb-main input[type=color]{padding:4px;height:46px}.thumb-checkbox{display:flex!important;align-items:center;gap:7px;font-size:12px!important}.thumb-button-row{display:flex;gap:7px}.thumb-button-row button,.thumb-canvas-bottom button,#layer-list button,.thumb-element-picker button{border:1px solid var(--thumb-line);background:#fff;border-radius:7px;padding:8px 10px;color:var(--thumb-ink);font-size:12px;cursor:pointer}.thumb-element-picker{margin:15px 0}.thumb-element-picker p{font-size:12px}.thumb-element-picker>div{display:flex;flex-wrap:wrap;gap:6px}.thumb-element-picker button{font-size:22px}.thumb-artboard-wrap{min-width:0}.thumb-artboard{aspect-ratio:16/9;background:#eee9f8;box-shadow:0 8px 30px #30214510;border-radius:7px;overflow:hidden}#thumbnail-canvas{display:block;width:100%;height:100%;touch-action:none;outline-offset:4px;cursor:default}.thumb-canvas-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:12px;color:var(--thumb-muted);font-size:11px}#layer-list{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}#layer-list button[aria-pressed=true]{background:#eee9f8;border-color:var(--thumb-purple)}.thumb-export>div{display:flex;gap:10px;flex-shrink:0}.thumb-history>div:first-child{margin-bottom:20px}.thumb-history h2{margin:5px 0}#thumbnail-history{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.thumb-history-card{border:1px solid var(--thumb-line);border-radius:10px;padding:0;overflow:hidden;background:white;text-align:left;cursor:pointer;color:var(--thumb-ink)}.thumb-history-card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}.thumb-history-card span{display:block;padding:10px;font-size:13px}.thumb-footnote{font-size:12px;line-height:1.7;color:var(--thumb-muted);max-width:850px}#reference-preview{display:flex;gap:10px;align-items:center;margin-top:12px}#reference-image{width:120px;border-radius:7px}#reference-preview button{border:0;background:none;font-size:12px;color:var(--thumb-purple);cursor:pointer}.thumb-main button:disabled{opacity:.5;cursor:not-allowed}.thumb-main button:focus-visible,.thumb-main a:focus-visible{outline:3px solid #9ca83c;outline-offset:3px}@media(max-width:900px){.thumb-intro{display:block}.thumb-quota{display:inline-block}.thumb-editor-grid{grid-template-columns:180px minmax(0,1fr)}.thumb-controls{padding-right:15px}.thumb-generate-row,.thumb-export{align-items:flex-start;flex-direction:column}.thumb-generate-row p{margin-top:0}#thumbnail-history{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:600px){.thumb-nav{padding:16px}.thumb-brand{font-size:21px}.thumb-brand span{display:none}.thumb-nav nav{font-size:12px;gap:13px}.thumb-nav nav a:first-child{display:none}.thumb-main{width:calc(100% - 28px);margin-top:26px}.thumb-intro h1{font-size:35px;letter-spacing:-1.3px}.thumb-intro p{font-size:15px}.thumb-create,.thumb-editor,.thumb-history{padding:18px;border-radius:13px}.thumb-input-row{grid-template-columns:1fr;gap:18px}.thumb-signin{display:block;padding:20px}.thumb-link-row{flex-wrap:wrap}.thumb-link-row input{flex:1;min-width:0}.thumb-editor-grid{display:flex;flex-direction:column-reverse;gap:18px}.thumb-controls{border-right:0;border-top:1px solid var(--thumb-line);padding-top:15px;padding-right:0}.thumb-add{max-width:300px}.thumb-export>div{width:100%;flex-wrap:wrap}.thumb-export .btn{flex:1;font-size:13px;padding-inline:12px}.thumb-editor-heading{align-items:flex-start}.thumb-editor-heading h2{font-size:21px}.thumb-property-row{max-width:300px}#thumbnail-history{grid-template-columns:repeat(2,minmax(0,1fr))}.thumb-main .btn{max-width:100%}}@media(prefers-reduced-motion:reduce){.thumb-spinner{animation:none}}