*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial;background:linear-gradient(135deg,#0f172a,#1e293b);min-height:100vh;display:grid;place-items:center;padding:20px}.login-shell{width:min(420px,100%)}.login-brand{text-align:center;color:white;margin-bottom:20px}.brand-logo{width:64px;height:64px;border-radius:18px;background:#2563eb;display:grid;place-items:center;margin:0 auto 12px;font-weight:800}.login-card{background:#fff;padding:28px;border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,.25)}label{display:grid;gap:7px;margin:14px 0;font-size:13px;font-weight:700}input{height:48px;border:1px solid #d1d5db;border-radius:11px;padding:0 13px}button{width:100%;height:50px;border:0;border-radius:11px;background:#2563eb;color:white;font-weight:800}.alert-error-page{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca;padding:12px;border-radius:10px}