* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #0f172a;
    color: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.welcome-container {
    text-align: center;
    padding: 2.5rem;
    border-radius: 12px;
    background-color: #1e293b;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #38bdf8;
}

p {
    font-size: 1.1rem;
    color: #94a3b8;
    margin-bottom: 1.5rem;
}

button {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: #0f172a;
    background-color: #38bdf8;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

button:hover {
    background-color: #0ea5e9;
}

#response-msg {
    margin-top: 1.5rem;
    font-weight: bold;
    color: #4ade80;
}

.hidden {
    display: none;
}