.tm-image-to-base64-converter{container-type:inline-size}.itb-controls-inner{padding:var(--spacing-4);display:flex;flex-direction:column;gap:var(--spacing-3);height:100%}.itb-empty-hint{display:flex;align-items:center;justify-content:center;padding:var(--spacing-8) var(--spacing-4);font-size:14px;color:var(--color-text-2);text-align:center;min-height:120px}.itb-drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-1);min-height:200px;padding:var(--spacing-8) var(--spacing-6);border:2px dashed var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-2);text-align:center;cursor:pointer;transition:border-color .15s ease,background .15s ease}.itb-drop-zone:hover,.itb-drop-zone:focus-visible,.itb-drop-zone.itb-dragover{border-color:var(--color-accent);background:var(--color-accent-bg);outline:none}.itb-drop-zone:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}[data-theme=dark] .itb-drop-zone{background:var(--color-bg-3)}[data-theme=dark] .itb-drop-zone:hover,[data-theme=dark] .itb-drop-zone:focus-visible,[data-theme=dark] .itb-drop-zone.itb-dragover{background:var(--color-accent-bg)}.itb-file-input{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.itb-drop-icon{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;margin-bottom:var(--spacing-2);border-radius:50%;background:var(--color-accent-bg);color:var(--color-accent)}.itb-drop-title{font-size:15px;font-weight:600;color:var(--color-text-1)}.itb-accept-hint{margin-top:var(--spacing-2);font-size:12px;color:var(--color-text-2);font-family:var(--font-mono)}.itb-browse-btn{margin-top:var(--spacing-2);font-size:13px;font-weight:500;color:var(--color-accent);text-decoration:underline;cursor:pointer;pointer-events:none}.itb-error-msg{display:flex;align-items:center;gap:var(--spacing-2);padding:var(--spacing-2) var(--spacing-3);border-radius:var(--radius-md);background:var(--color-danger-soft);color:var(--color-danger-text);font-size:13px;font-weight:500}.itb-error-msg--inline{margin-top:var(--spacing-2)}.itb-skeleton-wrap{display:flex;flex-direction:column;gap:var(--spacing-3);padding:var(--spacing-6);animation:itb-pulse 1.4s ease-in-out infinite}@keyframes itb-pulse{0%,to{opacity:1}50%{opacity:.5}}@media(prefers-reduced-motion:reduce){.itb-skeleton-wrap{animation:none}}.itb-skeleton{border-radius:var(--radius-md);background:var(--color-border)}.itb-skeleton--thumb{width:64px;height:64px;border-radius:var(--radius-md)}.itb-skeleton--line{height:14px;width:100%}.itb-skeleton--short{width:60%}.itb-result-panel{display:flex;flex-direction:column;gap:0;animation:itb-fadeUp .18s ease-out both}@keyframes itb-fadeUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.itb-result-panel{animation:none}}.itb-preview-row{display:flex;align-items:flex-start;gap:var(--spacing-4);padding-bottom:var(--spacing-4);border-bottom:1px solid var(--color-border)}.itb-preview-thumb{width:64px;height:64px;flex-shrink:0;border-radius:var(--radius-md);border:1px solid var(--color-border);object-fit:cover;background:var(--color-bg-2)}.itb-meta-block{display:flex;flex-direction:column;gap:var(--spacing-1);min-width:0;flex:1}.itb-meta-filename{font-size:14px;font-weight:600;color:var(--color-text-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.itb-meta-pills{display:flex;flex-wrap:wrap;gap:var(--spacing-1)}.itb-meta-pill{font-size:11px;color:var(--color-text-2);background:var(--color-bg-2);border:1px solid var(--color-border);border-radius:4px;padding:2px 8px;font-family:var(--font-mono);white-space:nowrap}.itb-meta-pill--success{background:var(--color-success-soft);border-color:var(--color-success-border);color:var(--color-success-text)}.itb-trust-line{display:flex;align-items:center;justify-content:center;gap:var(--spacing-1);padding:var(--spacing-2) 0;font-size:12px;color:var(--color-text-2)}.itb-format-tabs-row{display:flex;flex-wrap:wrap;gap:4px;padding:var(--spacing-3) 0;border-bottom:1px solid var(--color-border)}.itb-fmt-tab{display:inline-flex;align-items:center;height:32px;padding:0 12px;border:1px solid var(--color-border);border-radius:6px;background:transparent;font-family:var(--font-mono);font-size:12px;font-weight:500;color:var(--color-text-2);cursor:pointer;transition:border-color .12s ease,background .12s ease,color .12s ease;white-space:nowrap}.itb-fmt-tab:hover{border-color:var(--color-text-2);color:var(--color-text-1)}.itb-fmt-tab:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.itb-fmt-tab.itb-active{background:var(--color-accent-bg);border-color:var(--color-accent-border, var(--color-accent));color:var(--color-accent);font-weight:600}.itb-fmt-tab:active{transform:scale(.97)}.itb-output-block{padding:var(--spacing-3) 0 0;display:flex;flex-direction:column;gap:var(--spacing-2)}.itb-output-label{display:block;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:var(--color-text-2)}.itb-pre-wrap{position:relative}.itb-output-pre{background:var(--color-code-bg, var(--color-bg-2));border:1px solid var(--color-code-border, var(--color-border));border-radius:var(--radius-md);padding:14px 44px 14px 14px;font-family:var(--font-mono);font-size:11px;color:var(--color-code-text, var(--color-text-1));line-height:1.6;max-height:160px;overflow-y:auto;white-space:pre-wrap;word-break:break-all;user-select:text;margin:0}.itb-output-pre:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.itb-output-pre span{display:block;animation:itb-xfade .1s ease}@keyframes itb-xfade{0%{opacity:0}to{opacity:1}}@media(prefers-reduced-motion:reduce){.itb-output-pre span{animation:none}}.itb-output-copy-btn{position:absolute;top:8px;right:8px;display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;background:var(--color-surface, var(--color-bg));border:1px solid var(--color-border);border-radius:6px;color:var(--color-text-2);cursor:pointer;transition:border-color .12s ease,color .12s ease,background .12s ease}.itb-output-copy-btn:hover{border-color:var(--color-accent);color:var(--color-accent)}.itb-output-copy-btn:active{transform:scale(.95)}.itb-output-copy-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.itb-output-copy-btn.itb-copied{color:var(--color-success-text);border-color:var(--color-success-border);background:var(--color-success-soft)}.itb-output-copy-btn.itb-error{color:var(--color-danger-text);border-color:var(--color-danger-border);background:var(--color-danger-soft)}.itb-output-size-note{font-size:12px;color:var(--color-text-2);margin:0}.itb-output-size-val{font-family:var(--font-mono);font-weight:600;color:var(--color-accent)}.itb-large-note{font-size:12px;color:var(--color-text-2);margin:0;padding:var(--spacing-2) var(--spacing-3);border-radius:var(--radius-md);background:var(--color-bg-2);border:1px solid var(--color-border)}.itb-action-row{display:flex;gap:var(--spacing-2);flex-wrap:wrap;padding-top:var(--spacing-3);border-top:1px solid var(--color-border);margin-top:var(--spacing-2)}.itb-reset-btn{display:inline-flex;align-items:center;gap:var(--spacing-2);height:36px;padding:0 var(--spacing-4);border:1px solid var(--color-border);border-radius:var(--radius-md);background:transparent;font-family:var(--font-sans, inherit);font-size:13px;font-weight:500;color:var(--color-text-2);cursor:pointer;transition:border-color .15s ease,color .15s ease}.itb-reset-btn:hover{border-color:var(--color-text-2);color:var(--color-text-1)}.itb-reset-btn:active{transform:scale(.97)}.itb-reset-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.itb-download-btn{display:inline-flex;align-items:center;gap:var(--spacing-2);height:36px;padding:0 var(--spacing-4);border:1px solid var(--color-accent-border, var(--color-accent));border-radius:var(--radius-md);background:transparent;font-family:var(--font-sans, inherit);font-size:13px;font-weight:500;color:var(--color-accent);cursor:pointer;transition:border-color .15s ease,color .15s ease,background .15s ease}.itb-download-btn:hover{background:var(--color-accent-bg)}.itb-download-btn:active{transform:scale(.97)}.itb-download-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.itb-copy-toast{position:fixed;bottom:32px;left:50%;transform:translate(-50%) translateY(0);background:var(--color-text-2);color:var(--color-on-dark-strong);padding:10px 18px;border-radius:8px;font-size:14px;font-weight:500;z-index:300;pointer-events:none;animation:itb-toast-in .15s ease-out forwards,itb-toast-out .2s ease-in 1.5s forwards}@keyframes itb-toast-in{0%{opacity:0;transform:translate(-50%) translateY(20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes itb-toast-out{0%{opacity:1}to{opacity:0}}@media(prefers-reduced-motion:reduce){.itb-copy-toast{animation:none;opacity:1}}@container (max-width: 480px){.itb-controls-inner{padding:var(--spacing-3)}.itb-drop-zone{padding:var(--spacing-6) var(--spacing-4)}.itb-format-tabs-row{gap:3px}.itb-fmt-tab{height:28px;padding:0 8px;font-size:11px}.itb-action-row{flex-direction:column}.itb-action-row .itb-reset-btn,.itb-action-row .itb-download-btn{width:100%;justify-content:center}.itb-output-copy-btn{width:44px;height:44px}.itb-output-pre{padding-right:56px}}@container (min-width: 720px){.itb-result-panel{display:grid;grid-template-columns:minmax(200px,320px) minmax(0,1fr);gap:var(--spacing-5);align-items:start}.itb-preview-thumb{width:100%;max-width:320px;height:auto;max-height:none;aspect-ratio:auto}.itb-output-pre{max-height:none;min-height:280px}}