*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0d0d0d;--surface: #1a1a1a;--surface-2: #242424;--border: #2e2e2e;--accent: #f97316;--accent-hover: #fb923c;--text: #e5e5e5;--text-muted: #737373;--text-dim: #525252;--success: #22c55e;--error: #ef4444;--warning: #eab308;--radius: 10px;--radius-sm: 6px}html,body,#root{height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.5}.app{min-height:100vh;display:flex;flex-direction:column}.app-header{padding:28px 32px 20px;border-bottom:1px solid var(--border)}.app-header h1{font-size:22px;font-weight:700;letter-spacing:-.5px;color:var(--text)}.subtitle{font-size:13px;color:var(--text-muted);margin-top:2px}.app-main{flex:1;max-width:1000px;width:100%;margin:0 auto;padding:32px 24px 64px;display:flex;flex-direction:column;gap:28px}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:80px 40px;text-align:center;cursor:pointer;transition:border-color .15s,background 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infinite}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.arrange-bottom{display:flex;align-items:flex-start;gap:16px}.generate-area{display:flex;flex-direction:column;align-items:center;gap:10px;align-self:stretch}.btn-generate{flex:1;width:160px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius);font-size:18px;font-weight:700;line-height:1.25;text-align:center;cursor:pointer;transition:background .15s,opacity .15s;min-height:120px}.btn-generate:hover:not(:disabled){background:var(--accent-hover)}.btn-generate:disabled{opacity:.35;cursor:not-allowed}.btn-generate-icon{font-size:28px;line-height:1}.action-hint{font-size:12px;color:var(--text-dim);text-align:center;max-width:120px}.btn-primary{display:inline-flex;align-items:center;justify-content:center;padding:10px 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