html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

    .orcid-icon {
      width: 20px;
      height: 20px;
      margin-right: 8px;
    }
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background-color: #f8f9fa;
            padding-top: 70px;
            display: flex;
            flex-direction: column;
            min-height: 100vh;

        }
        main {
          flex: 1 0 auto; /* takes remaining space before footer */
        }

        .navbar {
            background-color: var(--primary-color);
            padding: 1rem 0;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        
        .navbar-brand {
            font-weight: 600;
            font-size: 1.5rem;
            color: white !important;
        }
        
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 4rem 0;
            margin-bottom: 3rem;
        }
        
        .btn-orcid {
            background-color: #a6ce39;
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .btn-orcid:hover {
            background-color: #8fb82e;
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }
        
        .project-card {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
            transition: all 0.3s;
        }
        
        .project-card:hover {
            box-shadow: 0 4px 16px rgba(0,0,0,0.12);
            transform: translateY(-2px);
        }
        
        .badge-area {
            background-color: var(--secondary-color);
            color: white;
        }
        
        .badge-status {
            background-color: #95a5a6;
            color: white;
        }
        
        .project-links a {
            color: var(--secondary-color);
            text-decoration: none;
            margin-right: 1rem;
            font-size: 0.9rem;
        }
        
        .project-links a:hover {
            text-decoration: underline;
        }
        
        .btn-contact {
            background-color: var(--accent-color);
            color: white;
            border: none;
        }
        
        .btn-contact:hover {
            background-color: #c0392b;
            color: white;
        }
        
        .upload-section {
            background: white;
            border-radius: 8px;
            padding: 2rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }
        
        .hidden {
            display: none;
        }

        footer {
            flex-shrink: 0;
        }

        .iconred, .iconred:hover, .iconred:active, .iconred:focus {
            color: lightcoral;
        }

        .icongreen, .icongreen:hover, .icongreen:active, .icongreen:focus {
            color: limegreen;
        }