body {
            margin: 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: #f0f2f5;
            font-family: sans-serif;
        }
        .wrapper {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .topbar {
            background: #2f4154;
            color: #fff;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .site-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            text-decoration: none;
            font-weight: bold;
            font-size: 18px;
        }
        .site-logo {
            height: 40px;
            width: auto;
        }
        .auth-block {
            display: flex;
            gap: 10px;
        }
        .btn {
            padding: 8px 16px;
            border-radius: 4px;
            text-decoration: none;
            color: #fff;
            font-size: 14px;
            background: #6f859e;
            transition: 0.2s;
        }
        .btn:hover {
            background: #526274;
        }
        .about-wrapper {
            flex: 1;
            padding: 40px 20px;
            display: flex;
            justify-content: center;
        }
        .about-box {
            background: #ffffff;
            max-width: 1100px;
            width: 100%;
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.06);
        }
        .about-title {
            text-align: center;
            color: #2f4154;
            font-size: 28px;
            margin: 0 0 10px;
        }
        .about-subtitle {
            text-align: center;
            color: #6f859e;
            font-size: 16px;
            line-height: 1.6;
            max-width: 800px;
            margin: 0 auto 35px;
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }
        .about-card {
            background: #f8f9fb;
            padding: 25px;
            border-radius: 8px;
            border: 1px solid #e2e7ec;
        }
        .about-card h3 {
            color: #2f4154;
            margin: 0 0 15px;
            font-size: 20px;
        }
        .about-card p {
            color: #6f859e;
            margin: 0 0 15px;
            line-height: 1.5;
        }
        .social-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        .social-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            background: #2f4154;
            color: #fff;
            text-decoration: none;
            border-radius: 6px;
            font-weight: 500;
            transition: background 0.2s;
        }
        .social-btn:hover {
            background: #6f859e;
        }
        .map-container iframe {
            width: 100%;
            height: 260px;
            border: none;
            border-radius: 8px;
            margin-top: 10px;
        }
        .back-link {
            display: block;
            text-align: center;
            margin: 25px auto 0;
            padding: 12px 28px;
            background: #2f4154;
            color: #fff;
            text-decoration: none;
            border-radius: 6px;
            font-weight: bold;
            width: fit-content;
            transition: background 0.2s;
        }
        .back-link:hover {
            background: #6f859e;
        }
        .site-footer {
            background: #2f4154;
            color: #ffffff;
            text-align: center;
            padding: 16px 20px;
            font-size: 14px;
            line-height: 1.5;
            margin-top: auto;
        }
        .site-footer p {
            margin: 0;
        }
        .site-footer .author {
            font-weight: 600;
            color: #e2e7ec;
        }
        @media (max-width: 768px) {
            .about-grid { grid-template-columns: 1fr; }
            .about-box { padding: 25px; }
        }