body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #2c3e50;
    color: white;
    overflow: hidden;
}

#app {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

section {
    width: 100%;
    max-width: 500px;
    text-align: center;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 { font-size: 3rem; text-shadow: 2px 4px #000; margin-bottom: 30px; }

input {
    padding: 12px;
    width: 80%;
    border-radius: 8px;
    border: none;
    margin-bottom: 10px;
    font-size: 1rem;
}

button {
    padding: 12px 25px;
    font-size: 1.1rem;
    cursor: pointer;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 8px;
    margin: 10px;
    transition: 0.3s;
    width: 85%;
}

button:hover { background: #2ecc71; transform: scale(1.05); }
button.secondary { background: #34495e; }