*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;min-height:100vh}#root{min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column;transition:background .8s ease}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 2rem;background:#0003;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.app-title{font-size:1.5rem;font-weight:700;color:#fff}.header-user{display:flex;align-items:center;gap:1rem}.user-name{color:#ffffffe6;font-size:.9rem}.logout-button{background:#fff3;border:1px solid rgba(255,255,255,.4);color:#fff;padding:.4rem 1rem;border-radius:6px;cursor:pointer;font-size:.85rem;transition:background .2s ease}.logout-button:hover{background:#ffffff4d}.main-content{flex:1;display:flex;flex-direction:column;align-items:center;padding:2rem;gap:2rem}.random-city-button{background:#ffffff40;border:2px solid rgba(255,255,255,.6);color:#fff;padding:.8rem 2rem;border-radius:50px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .2s ease;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.random-city-button:hover:not(:disabled){background:#ffffff59;transform:translateY(-2px);box-shadow:0 4px 15px #0003}.random-city-button:disabled{opacity:.7;cursor:not-allowed}.error-message{background:#e74c3c33;border:1px solid rgba(231,76,60,.5);color:#fff;padding:1rem 1.5rem;border-radius:10px;max-width:500px;text-align:center}.welcome-message{color:#fffc;font-size:1.1rem;text-align:center}.weather-display{background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:2rem;max-width:600px;width:100%}.weather-header{text-align:center;margin-bottom:1.5rem}.weather-emoji{font-size:3rem;display:block;margin-bottom:.5rem}.city-name{font-size:1.8rem;font-weight:700;margin-bottom:.3rem}.condition{font-size:1rem;opacity:.85}.weather-main{text-align:center;margin-bottom:1.5rem}.temperature{display:flex;flex-direction:column;align-items:center;gap:.3rem}.temp-value{font-size:4rem;font-weight:700;line-height:1}.feels-like{font-size:.95rem;opacity:.8}.weather-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.weather-item{display:flex;flex-direction:column;background:#ffffff1a;border-radius:10px;padding:.8rem 1rem;gap:.3rem}.weather-item .label{font-size:.8rem;opacity:.75}.weather-item .value{font-size:1.1rem;font-weight:600}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2)}.login-card{background:#fff;border-radius:20px;padding:3rem;max-width:400px;width:90%;text-align:center;box-shadow:0 20px 60px #0000004d}.login-card h1{font-size:2rem;margin-bottom:1rem;color:#333}.login-card p{color:#666;margin-bottom:2rem;line-height:1.6}.login-button{background:#0078d4;color:#fff;border:none;padding:.8rem 2rem;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s ease;width:100%}.login-button:hover{background:#006cbf}