html {
    box-sizing: border-box;
}
*, *:before, *:after {
    box-sizing: inherit;
}
body {
    background: #f5f5f5;
    color: #333;
    font-family: 'Segoe UI', 'Roboto', Arial, sans-serif;
    min-height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100vw;
    height: 100vh;
}
.container {
    text-align: center;
    padding: 2.5rem 2rem;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    max-width: 1000px;
    width: 90%;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    /* height: 100%; */
}
h1 {
    font-size: 2.3rem;
    margin-bottom: 1.2rem;
    word-break: break-word;
}
p {
    font-size: 1.15rem;
    color: #888;
    margin-bottom: 0;
}
a.button {
    color: #fff;
    background: #667eea;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.2s;
    display: inline-block;
    margin-top: 1.5rem;
    font-size: 1rem;
}
a.button:hover {
    background: #5a67d8;
}
@media (max-width: 600px) {
    body {
        min-height: 100vh;
        height: 100vh;
        width: 100vw;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .container {
        padding: 1.5rem 5vw;
        margin: 0;
        max-width: 98vw;
        border-radius: 12px;
        box-shadow: 0 4px 16px 0 rgba(31, 38, 135, 0.05);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        /* height: 100%; */
    }
    h1 {
        font-size: 1.4rem;
    }
    p {
        font-size: 1rem;
    }
    a.button {
        width: 100%;
        padding: 0.9rem 0;
        font-size: 1.05rem;
    }
}