:root{color-scheme:dark;--bg: #0f1117;--surface: #171a23;--surface-strong: #1f2430;--surface-soft: #252b38;--text: #f4f7fb;--muted: #a8b1c2;--faint: #6f7b8f;--line: #2d3443;--accent: #00d4aa;--accent-strong: #10f0c2;--accent-soft: rgba(0, 212, 170, .14);--danger: #ff6b6b;--warning: #f6b84b;--success: #45df8c;--radius: 8px;--shadow: 0 20px 60px rgba(0, 0, 0, .22);--font-ui: "DM Sans", "Sora", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace}:root[data-theme=light]{color-scheme:light;--bg: #f6f7fb;--surface: #ffffff;--surface-strong: #eef2f6;--surface-soft: #e5eaf0;--text: #121621;--muted: #566174;--faint: #758093;--line: #d9e0e8;--accent: #009e84;--accent-strong: #007f6b;--accent-soft: rgba(0, 158, 132, .12);--danger: #c93737;--warning: #a76800;--success: #098b50;--shadow: 0 18px 48px rgba(20, 29, 43, .12)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:linear-gradient(180deg,rgba(0,212,170,.08),transparent 280px),var(--bg);color:var(--text);font-family:var(--font-ui);letter-spacing:0}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,.dropzone:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.app-shell{width:min(1180px,calc(100% - 28px));margin:0 auto;padding:18px 0 40px}.app-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0 22px}.brand-block{display:flex;align-items:center;gap:12px;min-width:0}.brand-mark{display:grid;width:40px;height:40px;place-items:center;border:1px solid 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ease}.tab-button.is-active{background:var(--accent-soft);color:var(--accent-strong)}.tool-grid{display:grid;gap:18px;animation:slideUp .18s ease both}.tool-panel{display:grid;align-content:start;gap:18px;min-width:0;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:color-mix(in srgb,var(--surface) 94%,transparent);box-shadow:var(--shadow)}.field-group,.upload-control{display:grid;gap:8px}.field-header,.meter-row,.file-summary{display:flex;align-items:center;justify-content:space-between;gap:12px}.field-label{color:var(--text);font-size:.92rem;font-weight:700}.dropzone{position:relative;display:grid;min-height:260px;overflow:hidden;place-items:center;border:1px dashed var(--faint);border-radius:var(--radius);background:var(--surface-strong);color:var(--muted);cursor:pointer;transition:border-color .16s ease,background .16s ease,transform .16s ease}.dropzone:hover,.dropzone.is-dragging{border-color:var(--accent);background:var(--accent-soft)}.dropzone.has-preview{aspect-ratio:16 / 10;min-height:220px}.dropzone img{width:100%;height:100%;object-fit:contain;background:#0b0d12;animation:fadeIn .18s ease both}:root[data-theme=light] .dropzone img{background:#edf2f7}.dropzone-empty{display:grid;justify-items:center;gap:9px;padding:18px;text-align:center}.dropzone-empty span{color:var(--text);font-weight:700}.dropzone-empty small,.file-summary span,.field-note,.result-card span,.empty-state,.disclaimer{color:var(--muted);font-size:.88rem}.dropzone-overlay{position:absolute;inset:auto 12px 12px 12px;display:inline-flex;justify-content:center;padding:9px 12px;border-radius:6px;background:#0f1117c7;color:#fff;font-weight:700;opacity:0;transform:translateY(4px);transition:opacity .16s ease,transform .16s ease}.dropzone:hover .dropzone-overlay,.dropzone:focus .dropzone-overlay{opacity:1;transform:translateY(0)}.file-summary{min-height:46px;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-strong)}.file-summary div{display:grid;gap:3px;min-width:0}.file-summary strong{overflow:hidden;font-size:.92rem;text-overflow:ellipsis;white-space:nowrap}.message-box,.password-shell input{width:100%;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-strong);color:var(--text)}.message-box{min-height:220px;resize:vertical;padding:14px;line-height:1.55}.password-shell{display:grid;grid-template-columns:1fr auto;align-items:center;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-strong)}.password-shell input{min-width:0;height:44px;border:0;padding:0 12px;background:transparent}.icon-button{display:inline-grid;width:36px;height:36px;place-items:center;border-radius:6px;background:transparent;color:var(--muted)}.icon-button:hover{background:var(--surface-soft);color:var(--text)}.capacity-meter{display:grid;gap:8px}.meter-row{color:var(--muted);font-size:.88rem}.meter-track,.strength-track{height:9px;overflow:hidden;border-radius:999px;background:var(--surface-soft)}.meter-track span,.strength-track span{display:block;height:100%;border-radius:inherit;background:var(--accent);transition:width .16s ease,background .16s ease}.capacity-meter.is-over .meter-track 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