:root{--primary: #6B9080;--primary-dark: #557a68;--bg: #f8f9fa;--surface: #ffffff;--text: #333;--text-light: #666;--border: #dee2e6;--danger: #dc3545;--success: #28a745;--warning: #ffc107;--info: #17a2b8;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.app{min-height:100vh;display:flex;flex-direction:column}.app-layout{display:flex;flex:1}.main-content{flex:1;padding:24px;max-width:1200px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;transition:all .15s}.btn:hover{opacity:.85}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-secondary{background:var(--border);color:var(--text)}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:4px 10px;font-size:13px}.btn-block{width:100%;justify-content:center}.file-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--surface);border-radius:var(--radius);margin-bottom:16px;box-shadow:var(--shadow)}.filename{font-weight:500;color:var(--text-light)}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}.divider{height:1px;background:var(--border);margin:16px 0}h2{font-size:18px;margin-bottom:12px;color:var(--primary-dark)}h3{font-size:15px;margin-bottom:8px}.alert{padding:10px 14px;border-radius:var(--radius);font-size:14px;margin-bottom:12px}.alert-info{background:#e8f4f8;color:#0c5460}.alert-success{background:#d4edda;color:#155724}.alert-warning{background:#fff3cd;color:#856404}.alert-error{background:#f8d7da;color:#721c24}input[type=number],select{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;background:#fff}label{display:block;font-size:13px;font-weight:500;margin-bottom:4px;color:var(--text-light)}@media (max-width: 768px){.app-layout{flex-direction:column}.main-content{padding:12px;max-width:100%}.btn{min-height:44px;padding:10px 16px}.btn-sm{min-height:36px;padding:6px 12px}.card{padding:14px}.file-bar{padding:8px 12px}h2{font-size:16px}}