:root{font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0}#root{min-height:100vh;margin:0;padding:0;color:#0f172a;background:#f8fafc;font-family:Inter,Segoe UI,system-ui,-apple-system,sans-serif}.app{max-width:860px;margin:0 auto;padding:3.5rem 2rem 4rem;display:flex;flex-direction:column;gap:2.5rem}.app__header{background:#fff;padding:2.5rem;border-radius:20px;box-shadow:0 16px 40px #0f172a14}.app__header h1{margin:0 0 1rem;font-size:2.25rem;letter-spacing:-.02em}.app__summary{margin:0;line-height:1.7;color:#334155}.app__panel{background:#fff;padding:2rem 2.5rem;border-radius:18px;box-shadow:0 12px 30px #0f172a14}.app__panel h2{margin:0 0 .75rem;font-size:1.4rem}.app__hint{margin:0 0 1.5rem;color:#475569}.file-picker{display:flex;flex-direction:column;gap:.75rem;font-weight:600}.file-picker__label{color:#1e293b}.file-picker input[type=file]{padding:.55rem .7rem;border:1px solid #cbd5f5;border-radius:999px;background:#f8fafc}.file-picker input[type=file]::file-selector-button{margin-right:.85rem;padding:.75rem 1.6rem;border-radius:999px;border:none;background:#2563eb;color:#fff;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;box-shadow:0 12px 24px #2563eb40}.file-picker input[type=file]::file-selector-button:hover{background:#1d4ed8;transform:translateY(-1px)}.file-picker input[type=file]::file-selector-button:active{transform:translateY(0)}.file-picker input[type=file]::-webkit-file-upload-button{margin-right:.85rem;padding:.75rem 1.6rem;border-radius:999px;border:none;background:#2563eb;color:#fff;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;box-shadow:0 12px 24px #2563eb40}.file-picker input[type=file]::-webkit-file-upload-button:hover{background:#1d4ed8;transform:translateY(-1px)}.file-picker select{padding:.7rem;border:1px solid #cbd5f5;border-radius:12px;background:#f8fafc;color:#0f172a}.file-picker select:disabled{color:#64748b}.field-error{color:#b91c1c;font-weight:600;font-size:.95rem}.action-row{margin-top:1.5rem;display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.primary-button{padding:.75rem 1.6rem;border-radius:999px;border:none;background:#2563eb;color:#fff;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,background .2s ease;box-shadow:0 12px 24px #2563eb40}.primary-button:disabled{background:#94a3b8;cursor:not-allowed;box-shadow:none}.primary-button:not(:disabled):hover{background:#1d4ed8;transform:translateY(-1px)}.file-name{color:#475569;font-size:.95rem}.status-message{margin:1rem 0 0;color:#1e293b;font-weight:600}.progress-container{margin-top:1rem;display:flex;flex-direction:column;gap:.5rem}.progress-bar-wrapper{width:100%;height:12px;background:#e2e8f0;border-radius:999px;overflow:hidden;position:relative}.progress-bar-fill{height:100%;background:linear-gradient(90deg,#2563eb,#3b82f6);border-radius:999px;transition:width .3s ease;box-shadow:0 2px 8px #2563eb4d}.progress-text{color:#475569;font-size:.9rem;font-weight:500;text-align:center}.download-row{margin-top:1rem}.secondary-button{display:inline-block;padding:.7rem 1.4rem;border-radius:999px;border:1px solid #2563eb;background:#fff;color:#2563eb;font-weight:600;text-decoration:none;transition:background .2s ease,color .2s ease}.secondary-button:hover{background:#2563eb;color:#fff}