:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg: #f8fafc;--card-bg: #ffffff;--text-main: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--error: #ef4444;--success: #22c55e;--radius: 8px;--shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg);color:var(--text-main);line-height:1.5}.container{max-width:1000px;margin:0 auto;padding:2rem}.card{background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);padding:2rem}h1{font-size:1.5rem;margin-bottom:1.5rem;color:var(--text-main)}.form-group{margin-bottom:1.5rem}label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.5rem;color:var(--text-muted)}input,select{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;outline:none;transition:border-color .2s}input:focus,select:focus{border-color:var(--primary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;font-size:1rem;font-weight:500;border-radius:var(--radius);border:none;cursor:pointer;transition:all .2s;gap:.5rem}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.presets{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:.75rem;margin-bottom:1.5rem}.preset-btn{padding:.75rem;border:1px solid var(--border);border-radius:var(--radius);background:var(--card-bg);cursor:pointer;text-align:center;font-size:.875rem;transition:all .2s}.preset-btn:hover{border-color:var(--primary);color:var(--primary)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:#fff;padding:2rem;border-radius:var(--radius);max-width:400px;width:100%}.modal-title{font-size:1.25rem;margin-bottom:1rem}.modal-footer{display:flex;justify-content:flex-end;gap:1rem;margin-top:2rem}.alert{padding:1rem;border-radius:var(--radius);margin-bottom:1.5rem;font-size:.875rem}.alert-success{background:#f0fdf4;color:var(--success);border:1px solid #dcfce7}.alert-error{background:#fef2f2;color:var(--error);border:1px solid #fee2e2}.nav{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.user-info{font-size:.875rem;color:var(--text-muted)}