:root{--primary:#2563eb;--primary-hover:#1d4ed8;--secondary:#64748b;--bg-app:#f8fafc;--bg-card:#fff;--text-main:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--error:#ef4444;--success:#22c55e;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-app);color:var(--text-main);font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}.btn{align-items:center;border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;display:inline-flex;font-size:.875rem;font-weight:500;gap:.5rem;justify-content:center;padding:.625rem 1.25rem;transition:all .2s}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover);box-shadow:var(--shadow);transform:translateY(-1px)}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:1.5rem}.input-group{margin-bottom:1.25rem}.input-group label{color:var(--text-main);display:block;font-size:.875rem;font-weight:500;margin-bottom:.5rem}.input-group input{border:1px solid var(--border);border-radius:var(--radius-md);font-size:1rem;outline:none;padding:.75rem;transition:border-color .2s;width:100%}.input-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.text-center{text-align:center}.mt-4{margin-top:1rem}.mt-8{margin-top:2rem}.mb-4{margin-bottom:1rem}.mb-8{margin-bottom:2rem}