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

        body {
            font-family: Verdana, Arial, Helvetica, sans-serif;
            font-size: 14px;
            line-height: 1.6;
            color: #333;
            background: #fff;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .header {
            background: linear-gradient(135deg, #57a7a4 0%, #006f9b 100%);
            color: white;
            padding: 2rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .logo-area {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1rem;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }

        .nav-tabs {
            display: flex;
            gap: 2px;
            margin-top: 1rem;
        }

        .nav-tab {
            background: rgba(255,255,255,0.1);
            color: white;
            padding: 0.75rem 2rem;
            text-decoration: none;
            border-radius: 5px 5px 0 0;
            font-size: 0.9rem;
            transition: background 0.3s;
        }

        .nav-tab:hover {
            background: rgba(255,255,255,0.2);
        }

        .nav-tab.research {
            background: #57a7a4;
        }

        .nav-tab.education {
            background: #d37f1f;
        }

        .nav-tab.hesa {
            background: #eab80b;
        }

        .toolbar {
            background: #c4c5c6;
            padding: 0.5rem 0;
            font-size: 0.8rem;
        }

        .toolbar-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .toolbar-links {
            display: flex;
            gap: 1rem;
        }

        .toolbar-links a {
            color: #333;
            text-decoration: none;
        }

        .toolbar-links a:hover {
            text-decoration: underline;
        }

        .main-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
            flex: 1;
            display: grid;
            grid-template-columns: 1fr 250px;
            gap: 2rem;
        }

        .content-area {
            background: white;
        }

        h1 {
            color: #57a7a4;
            font-size: 1.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }

        article {
            margin-bottom: 2rem;
        }

        article p {
            margin-bottom: 1rem;
            text-align: justify;
        }

        article h2 {
            color: #006f9b;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.75rem 0;
        }

        article h3 {
            color: #333;
            font-size: 1.1rem;
            margin: 1rem 0 0.5rem 0;
        }

        .transition-section {
            background: #f8f8f8;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 2rem;
            border-left: 4px solid #57a7a4;
        }

        .links-section {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .links-section h3 {
            color: #57a7a4;
            font-size: 1.2rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #57a7a4;
        }

        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.5rem;
            margin-bottom: 2rem;
        }

        .links-section li {
            padding: 0.5rem 0;
        }

        .links-section a {
            color: #006f9b;
            text-decoration: none;
            display: block;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s;
            border-left: 3px solid transparent;
        }

        .links-section a:hover {
            background: #f0f8ff;
            border-left-color: #57a7a4;
            transform: translateX(5px);
        }

        .sidebar {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            height: fit-content;
        }

        .sidebar-section {
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e0e0e0;
        }

        .sidebar-section:last-child {
            border-bottom: none;
        }

        .sidebar h3 {
            color: #57a7a4;
            font-size: 1rem;
            margin-bottom: 0.75rem;
        }

        .sidebar-links {
            list-style: none;
        }

        .sidebar-links li {
            margin-bottom: 0.5rem;
        }

        .sidebar-links a {
            color: #006f9b;
            text-decoration: none;
            font-size: 0.9rem;
        }

        .sidebar-links a:hover {
            text-decoration: underline;
        }

        .footer {
            background: #c4c5c6;
            padding: 2rem 0 1rem;
            margin-top: auto;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            text-align: center;
        }

        .footer-tabs {
            display: flex;
            justify-content: center;
            gap: 2px;
            margin-bottom: 1rem;
        }

        .footer-tab {
            padding: 0.75rem 2rem;
            text-decoration: none;
            color: white;
            font-size: 0.9rem;
        }

        .footer-tab.research {
            background: #57a7a4;
        }

        .footer-tab.education {
            background: #d37f1f;
        }

        .footer-tab.hesa {
            background: #eab80b;
        }

        .footer-links {
            font-size: 0.8rem;
            color: #333;
        }

        .footer-links a {
            color: #333;
            text-decoration: none;
            font-weight: bold;
        }

        .footer-links a:hover {
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            .main-container {
                grid-template-columns: 1fr;
                padding: 1rem;
            }

            .header-content,
            .toolbar-content,
            .footer-content {
                padding: 0 1rem;
            }

            .logo-area {
                flex-direction: column;
                text-align: center;
            }

            .nav-tabs {
                justify-content: center;
                flex-wrap: wrap;
            }

            .nav-tab {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }

            .toolbar-content {
                flex-direction: column;
                gap: 0.5rem;
            }

            .toolbar-links {
                flex-wrap: wrap;
                justify-content: center;
            }

            .links-section ul {
                grid-template-columns: 1fr;
            }

            .footer-tabs {
                flex-direction: column;
                align-items: center;
            }

            h1 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 480px) {
            .nav-tab {
                padding: 0.4rem 0.8rem;
                font-size: 0.7rem;
            }

            .main-container {
                padding: 0.5rem;
            }

            .transition-section,
            .links-section,
            .sidebar {
                padding: 1rem;
            }

            h1 {
                font-size: 1.3rem;
            }
        }