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

body {
    text-align: center;
    font-family: "Manrope", Arial, Helvetica, sans-serif;
    background: #f2f2f6;
    color: #111111;
    padding-bottom: 40px;
}

header {
    width: min(96%, 1200px);
    margin: 14px auto 0;
    padding: 22px 16px;
    border-radius: 0 0 22px 22px;
    background:
        linear-gradient(140deg, rgba(24, 92, 191, 0.95), rgba(74, 163, 255, 0.88)),
        linear-gradient(90deg, #1f6fe5, #4aa3ff);
    color: white;
    font-size: 2rem;
    font-weight: 800;
    box-shadow: 0 18px 45px rgba(31, 111, 229, 0.2);
}

h1 {
    margin: 40px;
    color: #000000;
    line-height: 50px !important;
    font-size: 37px !important;
}

a {
    text-decoration: none;
    color: white;
}

.back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    min-width: 100px;
    min-height: 50px;
    margin: 0;
    padding: 14px 24px;
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.98rem;
    font-weight: 700;
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 1000;
    transition: 0.2s ease;
}

footer {
    width: min(96%, 1200px);
    margin-top: 32px;
    margin-left: auto;
    margin-right: auto;
    background:
        linear-gradient(140deg, rgba(24, 92, 191, 0.95), rgba(74, 163, 255, 0.88)),
        linear-gradient(90deg, #1f6fe5, #4aa3ff);
    color: white;
    padding: 18px 12px;
    font-size: 1rem;
    border-radius: 22px 22px 0 0;
    box-shadow: 0 -8px 30px rgba(31, 111, 229, 0.14);
}

@media (max-width: 900px) {
    .btn-container {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    header {
        font-size: 1.7rem;
    }

    h1 {
        width: 92%;
        margin-bottom: 28px;
        font-size: 1.65rem;
    }

    .btn-container {
        width: 92%;
        grid-template-columns: 1fr;
    }

    .back {
        right: 16px;
        bottom: 16px;
        min-width: 150px;
        min-height: 54px;
        padding: 12px 20px;
    }
}