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

body {
    background: #f0f4f8;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    line-height: 1.7;
    color: #3a3a3a;
    padding: 2rem 1rem;
}

::selection {
    background-color: #0274be;
    color: #ffffff;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 20px 35px -12px rgba(27, 128, 243, 0.12);
    overflow: hidden;
    padding: 2.5rem 2.5rem 3rem;
}

.site-header {
    background: linear-gradient(135deg, #1b80f3 0%, #0274be 100%);
    margin: -2.5rem -2.5rem 2rem;
    padding: 1.75rem 2.5rem;
    color: #ffffff;
}

.site-header .back-link {
    display: inline-block;
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.site-header .back-link:hover {
    color: #ffffff;
}

h1 {
    font-size: 2.1rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.3;
}

h2 {
    font-size: 1.6rem;
    margin: 2rem 0 1rem;
    color: #3a3a3a;
    border-bottom: 2px solid #efefef;
    padding-bottom: 0.45rem;
}

p {
    margin-bottom: 1rem;
    font-size: 1rem;
    color: #3a3a3a;
}

a {
    color: #0274be;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid rgba(2, 116, 190, 0.35);
}

a:hover,
a:focus {
    color: #3a3a3a;
    border-bottom-color: #3a3a3a;
}

ul,
ol {
    margin: 0.75rem 0 1.25rem 1.75rem;
}

li {
    margin: 0.5rem 0;
    color: #3a3a3a;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

th {
    background-color: #1b80f3;
    color: #ffffff;
    padding: 12px 14px;
    font-weight: 600;
    text-align: left;
}

td {
    border: 1px solid #efefef;
    padding: 11px 14px;
    background-color: #fff;
    color: #3a3a3a;
    vertical-align: top;
}

tr:nth-child(even) td {
    background-color: #f8fbff;
}

footer {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: #808285;
    border-top: 1px solid #efefef;
}

@media (max-width: 767px) {
    body {
        padding: 1rem 0.75rem;
    }

    .container {
        padding: 1.5rem 1.25rem 2rem;
        border-radius: 8px;
    }

    .site-header {
        margin: -1.5rem -1.25rem 1.5rem;
        padding: 1.5rem 1.25rem;
    }

    h1 {
        font-size: 1.6rem;
    }

    h2 {
        font-size: 1.35rem;
    }

    table,
    th,
    td {
        font-size: 0.88rem;
    }
}