:root{--bg: #f5f7fa;--bg-card: #ffffff;--text: #1a1a2e;--text-muted: #6b7280;--primary: #4f46e5;--primary-hover: #4338ca;--danger: #ef4444;--danger-hover: #dc2626;--border: #e5e7eb;--radius: 8px}*{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:1.6}.container{max-width:800px;margin:0 auto;padding:2rem 1rem}.navbar{background:var(--bg-card);border-bottom:1px solid var(--border);padding:.75rem 2rem;display:flex;justify-content:space-between;align-items:center}.nav-brand{font-weight:700;font-size:1.2rem;color:var(--primary);text-decoration:none}.nav-right{display:flex;gap:1rem;align-items:center}.nav-link{color:var(--text-muted);text-decoration:none;font-size:.9rem}.nav-link:hover{color:var(--primary)}.btn-link{background:none;border:none;cursor:pointer;font-size:.9rem}.btn{display:inline-block;padding:.6rem 1.2rem;border:none;border-radius:var(--radius);cursor:pointer;font-size:.95rem;font-weight:500;transition:background .15s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:var(--danger-hover)}.btn-sm{padding:.35rem .7rem;font-size:.85rem}input,select{padding:.6rem .8rem;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem;width:100%}input:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1rem}.error-msg{color:var(--danger);font-size:.9rem;margin-top:.5rem}