.container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        h1 {
            color: #2c3e50;
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
            background: linear-gradient(45deg, #667eea, #764ba2);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .subtitle {
            color: #666;
            font-size: 1.1rem;
        }

        .tabs {
            display: flex;
            justify-content: center;
            margin-bottom: 2rem;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 15px;
            padding: 10px;
            backdrop-filter: blur(10px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .tab {
            background: transparent;
            border: none;
            padding: 1rem 2rem;
            font-size: 1rem;
            cursor: pointer;
            border-radius: 10px;
            transition: all 0.3s ease;
            color: #666;
            font-weight: 500;
        }

        .tab.active {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .tab:hover:not(.active) {
            background: rgba(102, 126, 234, 0.1);
            transform: translateY(-1px);
        }

        .content {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            padding: 2rem;
            backdrop-filter: blur(10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }

        .concurso-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }

        .concurso-card {
            background: white;
            border-radius: 15px;
            padding: 1.5rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            border-left: 5px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .concurso-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(45deg, #667eea, #764ba2);
        }

        .concurso-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
        }

        .concurso-card.activo {
            border-left-color: #27ae60;
        }

        .concurso-card.finalizado {
            border-left-color: #95a5a6;
        }

        .concurso-header {
            display: flex;
            justify-content: between;
            align-items: flex-start;
            margin-bottom: 1rem;
        }

        .concurso-titulo {
            font-size: 1.3rem;
            font-weight: bold;
            color: #2c3e50;
            margin-bottom: 0.5rem;
        }

        .estado {
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .estado.activo {
            background: #27ae60;
            color: white;
        }

        .estado.finalizado {
            background: #95a5a6;
            color: white;
        }

        .concurso-info {
            margin: 1rem 0;
        }

        .info-item {
            display: flex;
            align-items: center;
            margin-bottom: 0.8rem;
            color: #666;
        }

        .info-item i {
            margin-right: 0.8rem;
            width: 20px;
            color: #667eea;
        }

        .concurso-descripcion {
            color: #666;
            margin: 1rem 0;
            line-height: 1.6;
        }

        .concurso-actions {
            display: flex;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .btn {
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 500;
            text-decoration: none;
            display: inline-block;
            text-align: center;
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }

        .btn-primary {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: #667eea;
            border: 2px solid #667eea;
        }

        .btn-secondary:hover {
            background: #667eea;
            color: white;
        }

        .filtros {
            display: flex;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
            align-items: center;
        }

        .filtro-grupo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .filtro-grupo label {
            font-weight: 500;
            color: #555;
        }

        select, input {
            padding: 0.5rem 1rem;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            font-size: 0.9rem;
            transition: border-color 0.3s ease;
        }

        select:focus, input:focus {
            outline: none;
            border-color: #667eea;
        }

        .empty-state {
            text-align: center;
            padding: 3rem 2rem;
            color: #666;
        }

        .empty-state i {
            font-size: 4rem;
            color: #ddd;
            margin-bottom: 1rem;
        }

        @media (max-width: 768px) {
            .tabs {
                flex-direction: column;
                gap: 0.5rem;
            }

            .tab {
                width: 100%;
                text-align: center;
            }

            .concurso-grid {
                grid-template-columns: 1fr;
            }

            .filtros {
                flex-direction: column;
                align-items: stretch;
            }

            h1 {
                font-size: 2rem;
            }
        }