body {
    background: linear-gradient(135deg, #232526 0%, #414345 100%);
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    min-height: 100vh;
    padding-top: 32px;
}

.container {
    max-width: 700px;
    margin: 40px auto;
    background: rgba(34, 34, 34, 0.95);
    border-radius: 24px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    padding: 32px 24px 40px 24px;
}

header {
    text-align: center;
    margin-bottom: 24px;
}

h1 {
    color: #fff;
    font-size: 2.5rem;
    margin: 0 0 16px 0;
    letter-spacing: 2px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 18px;
    margin-bottom: 8px;
}

.item {
    background: #181818;
    border-radius: 50%;
    padding: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.2s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.item:hover {
    background: #333;
    transform: translateY(-3px) scale(1.08);
}

.item img {
    width: 28px;
    height: 28px;
}

.featured {
    margin: 24px 0 32px 0;
    text-align: center;
}

iframe {
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.18);
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    display: block;
}

.useful-sites {
    margin-top: 24px;
}

.useful-sites h2 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 18px;
    text-align: center;
    letter-spacing: 1px;
}

.sites-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.site-card {
    background: linear-gradient(120deg, #232526 60%, #414345 100%);
    border-radius: 16px;
    padding: 20px 24px;
    color: #fff;
    text-decoration: none;
    box-shadow: 0 2px 8px rgba(0,0,0,0.13);
    transition: box-shadow 0.2s, transform 0.2s, background 0.2s;
    display: flex;
    align-items: center;
    gap: 18px;
}

.site-card:hover {
    box-shadow: 0 6px 24px rgba(255,215,0,0.18);
    background: linear-gradient(120deg, #414345 60%, #ffd700 100%);
    color: #232526;
    transform: translateY(-2px) scale(1.03);
}

.site-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #232526;
    border-radius: 12px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.10);
    margin-right: 8px;
}

.site-icon img {
    width: 32px;
    height: 32px;
    display: block;
}

.site-info {
    flex: 1;
    min-width: 0;
}

.site-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 6px;
    color: inherit;
}

.site-desc {
    font-size: 1rem;
    color: #e0e0e0;
    word-break: break-word;
}

.site-url {
    display: block;
    font-size: 0.95em;
    color: #ffd700;
    margin-top: 2px;
    font-weight: 500;
}

@media (max-width: 600px) {
    .container {
        padding: 12px 2vw 24px 2vw;
    }
    h1 {
        font-size: 2rem;
    }
    .site-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 14px 10px;
        gap: 10px;
    }
    .site-icon {
        margin-right: 0;
        margin-bottom: 6px;
    }
    .site-title {
        font-size: 1.05rem;
    }
    .site-desc {
        font-size: 0.97rem;
    }
    body {
        padding-top: 18px;
    }
}