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

body {
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #f8fafc;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 24px;
}

header {
    width: 100%;
    max-width: 800px;
    padding: 60px 30px;
    text-align: center;
    background: #1e293b;
    border-radius: 16px;
}

h1 {
    color: #38bdf8;
    font-size: 2.5rem;
    margin-bottom: 20px;
}

p {
    margin: 16px 0;
    line-height: 1.6;
}

.cta {
    display: inline-block;
    margin-top: 20px;
    padding: 14px 24px;
    background: #38bdf8;
    color: #0f172a;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
}

footer {
    margin-top: 30px;
    color: #94a3b8;
    text-align: center;
}

/* Day 3: Footer readability and responsive layout */
footer {
    width: 100%;
    max-width: 800px;
    margin: 24px auto 0;
    padding: 20px 24px;
    color: #e2e8f0;
    background: #1e293b;
    border: 1px solid #475569;
    border-radius: 12px;
    text-align: center;
    line-height: 1.7;
    overflow-wrap: anywhere;
}

footer p {
    margin: 8px 0;
}

@media (max-width: 600px) {
    body {
        padding: 16px;
        justify-content: flex-start;
    }

    header {
        padding: 36px 20px;
        border-radius: 12px;
    }

    h1 {
        font-size: clamp(1.7rem, 7vw, 2.5rem);
        line-height: 1.2;
    }

    .cta {
        max-width: 100%;
        padding: 12px 18px;
        overflow-wrap: anywhere;
    }

    footer {
        margin-top: 18px;
        padding: 16px 12px;
        font-size: 0.95rem;
    }
}