html, body {
    min-height: 100vh;
    margin: 0;
    padding: 0;
    font-family: 'Nunito', Arial, sans-serif;
    background: #151b24;
    color: #f0f3fa;
}
body {
    min-height: 100vh;
}
.site-wrapper {
    max-width: 1400px;
    min-height: 98vh;
    margin: 48px auto 54px auto;
    background: #202837;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(20,32,55,0.22);
    padding-bottom: 32px;
    display: flex;
    flex-direction: column;
}
header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 48px 48px 16px 48px;
    background: #232941;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 1.5px 18px #10182a50;
}
.site-title {
    text-align: center;
    font-size: 2.4em;
    color: #fff;
    font-weight: 900;
    letter-spacing: 0.01em;
    margin: 0 0 12px 0;
    width: 100%;
}
nav {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 24px 0 12px 0;
}
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 54px;
    font-weight: 600;
    font-size: 1.15em;
}
nav li {
    display: flex;
}
nav a {
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    border-radius: 2px;
    color: #c2e1ff;
    transition: color 0.2s, border-bottom 0.2s, background-color 0.2s;
    display: inline-block;
}
nav a:hover,
nav a:focus {
    color: #fff;
    border-bottom: 2px solid #285be7;
    background: #171e2c;
}
.guide-content {
    background: #212a3c;
    border-radius: 16px;
    max-width: 1100px;
    margin: 60px auto 0 auto;
    box-shadow: 0 6px 32px #131b3032;
    min-height: 520px;
    padding: 60px 68px 48px 68px;
    font-size: 1.19em;
    line-height: 1.75;
    color: #f1f6ff;
    letter-spacing: 0.01em;
    word-break: break-word;
}
.guide-content h1, .guide-content h2, .guide-content h3 {
    color: #aabeff;
    font-weight: 900;
    letter-spacing: 0.012em;
    line-height: 1.25;
    margin-top: 52px;
    margin-bottom: 0.7em;
}
.guide-content h1 {
    text-align: center;
    font-size: 2.45em;
    margin-top: 0;
}
.guide-content h2 {
    font-size: 1.37em;
    margin-top: 2.4em;
}
.guide-content h3 {
    font-size: 1.21em;
    margin-top: 2em;
}
.guide-content p {
    color: #e4ecfa;
    font-size: 1.07em;
    margin: 0.65em 0;
}
.guide-content ul, .guide-content ol {
    color: #d0e2ff;
    font-size: 1.08em;
    padding-left: 2em;
    margin: 1.1em 0;
}
.guide-content blockquote {
    background: #283753;
    border-left: 5px solid #65a4ff;
    color: #c7d1eb;
    margin: 1.7em 0;
    padding: 20px 24px 18px 28px;
    font-size: 1.12em;
    border-radius: 12px;
}
.guide-content code, .guide-content pre {
    background: #181e28;
    color: #f2ffb9;
    border-radius: 8px;
    font-size: 0.97em;
    padding: 2px 6px;
}
.guide-content pre {
    display: block;
    padding: 16px 16px 16px 18px;
    margin: 18px 0;
    width: 100%;
    overflow-x: auto;
    background: #161c28;
    color: #dbe9ff;
    font-size: 0.98em;
    border-radius: 10px;
}
.guide-content img {
    display: block;
    max-width: 90%;
    margin: 34px auto;
    border-radius: 13px;
    box-shadow: 0 2px 18px #00000027;
}
a {
    color: #72b0ff;
    text-decoration: underline;
}
a:hover {
    color: #fffda8;
}
@media (max-width: 1300px) {
    .guide-content {
        padding: 38px 3vw 34px 3vw;
        max-width: 97vw;
    }
}
@media (max-width: 900px) {
    .site-wrapper {
        margin: 12px 1vw 10px 1vw;
    }
    header {
        padding: 20px 3vw 10px 3vw;
    }
    .site-title {
        font-size: 1.35em;
    }
    nav {
        padding: 7px 2vw 12px 2vw;
    }
    nav ul {
        gap: 12px;
        flex-wrap: wrap;
    }
    .guide-content {
        padding: 14px 2vw 18px 2vw;
        margin: 10vw 0 0 0;
        min-height: 220px;
    }
}