body {
    font-family: Arial, sans-serif;
    background: #f3f4f9;
}
.container {
    max-width: 1200px;
    width: 90%;
    margin: 30px auto;
    background: #fff;
    padding: 2em 2em 1.5em 2em;
    border-radius: 10px;
    box-shadow: 0 4px 16px #8881;
}
form {
    margin: 2em 0;
}
input, button {
    padding: 0.5em;
    margin: 0.5em 0;
    border-radius: 4px;
    border: 1px solid #bbb;
}
button {
    background: #1251b5;
    color: #fff;
    border: none;
    cursor: pointer;
}
button:hover {
    background: #0c3480;
}
pre {
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.98em;
}
.tooltip-i {
    display: inline-block;
    position: relative;
    cursor: pointer;
    margin-left: 0.4em;
    color: #1757aa;
}
.tooltip-i b {
    display: inline-block;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #eaf2fb;
    color: #1757aa;
    text-align: center;
    line-height: 17px;
    font-size: 15px;
    font-family: Arial, sans-serif;
    border: 1px solid #b3c9e9;
    font-weight: bold;
    transition: background 0.2s;
}
.tooltip-i b:hover {
    background: #d6e6fa;
}
.tooltip-text {
    display: none;
    position: absolute;
    left: 120%;
    top: 50%;
    transform: translateY(-50%);
    width: 320px;
    background: #fff;
    color: #1d2329;
    border: 1px solid #c9e3ff;
    border-radius: 8px;
    box-shadow: 0 2px 16px #a1b6e63a;
    padding: 14px 18px;
    font-size: 0.97em;
    z-index: 100;
    white-space: normal;
    text-align: left;
    pointer-events: none;
}
.tooltip-i:hover .tooltip-text,
.tooltip-i:focus-within .tooltip-text {
    display: block;
}
.tooltip-text a {
    color: #1757aa;
    text-decoration: underline;
}
.tooltip-text code {
    background: #eef2fa;
    border-radius: 4px;
    padding: 0 4px;
    font-size: 0.97em;
}